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-rw-r--r--gc/cord/README31
-rwxr-xr-xgc/cord/SCOPTIONS.amiga14
-rw-r--r--gc/cord/SMakefile.amiga20
-rw-r--r--gc/cord/cord.h327
-rw-r--r--gc/cord/cordbscs.c915
-rw-r--r--gc/cord/cordprnt.c390
-rw-r--r--gc/cord/cordtest.c228
-rw-r--r--gc/cord/cordxtra.c621
-rw-r--r--gc/cord/de.c603
-rw-r--r--gc/cord/de_cmds.h33
-rwxr-xr-xgc/cord/de_win.ICObin0 -> 766 bytes
-rw-r--r--gc/cord/de_win.RC78
-rw-r--r--gc/cord/de_win.c366
-rw-r--r--gc/cord/de_win.h103
-rw-r--r--gc/cord/ec.h70
-rw-r--r--gc/cord/gc.h754
-rw-r--r--gc/cord/private/cord_pos.h118
17 files changed, 4671 insertions, 0 deletions
diff --git a/gc/cord/README b/gc/cord/README
new file mode 100644
index 0000000..6210145
--- /dev/null
+++ b/gc/cord/README
@@ -0,0 +1,31 @@
+Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
+
+THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+
+Permission is hereby granted to use or copy this program
+for any purpose, provided the above notices are retained on all copies.
+Permission to modify the code and to distribute modified code is granted,
+provided the above notices are retained, and a notice that the code was
+modified is included with the above copyright notice.
+
+Please send bug reports to Hans-J. Boehm (boehm@sgi.com).
+
+This is a string packages that uses a tree-based representation.
+See cord.h for a description of the functions provided. Ec.h describes
+"extensible cords", which are essentially output streams that write
+to a cord. These allow for efficient construction of cords without
+requiring a bound on the size of a cord.
+
+de.c is a very dumb text editor that illustrates the use of cords.
+It maintains a list of file versions. Each version is simply a
+cord representing the file contents. Nonetheless, standard
+editing operations are efficient, even on very large files.
+(Its 3 line "user manual" can be obtained by invoking it without
+arguments. Note that ^R^N and ^R^P move the cursor by
+almost a screen. It does not understand tabs, which will show
+up as highlighred "I"s. Use the UNIX "expand" program first.)
+To build the editor, type "make cord/de" in the gc directory.
+
+This package assumes an ANSI C compiler such as gcc. It will
+not compile with an old-style K&R compiler.
diff --git a/gc/cord/SCOPTIONS.amiga b/gc/cord/SCOPTIONS.amiga
new file mode 100755
index 0000000..2a09197
--- /dev/null
+++ b/gc/cord/SCOPTIONS.amiga
@@ -0,0 +1,14 @@
+MATH=STANDARD
+CPU=68030
+NOSTACKCHECK
+OPTIMIZE
+VERBOSE
+NOVERSION
+NOICONS
+OPTIMIZERTIME
+INCLUDEDIR=/
+DEFINE AMIGA
+LIBRARY=cord.lib
+LIBRARY=/gc.lib
+IGNORE=100
+IGNORE=161
diff --git a/gc/cord/SMakefile.amiga b/gc/cord/SMakefile.amiga
new file mode 100644
index 0000000..5aef131
--- /dev/null
+++ b/gc/cord/SMakefile.amiga
@@ -0,0 +1,20 @@
+# Makefile for cord.lib
+# Michel Schinz 1994/07/20
+
+OBJS = cordbscs.o cordprnt.o cordxtra.o
+
+all: cord.lib cordtest
+
+cordbscs.o: cordbscs.c
+cordprnt.o: cordprnt.c
+cordxtra.o: cordxtra.c
+cordtest.o: cordtest.c
+
+cord.lib: $(OBJS)
+ oml cord.lib r $(OBJS)
+
+cordtest: cordtest.o cord.lib
+ sc cordtest.o link
+
+clean:
+ delete cord.lib cordtest \#?.o \#?.lnk
diff --git a/gc/cord/cord.h b/gc/cord/cord.h
new file mode 100644
index 0000000..584112f
--- /dev/null
+++ b/gc/cord/cord.h
@@ -0,0 +1,327 @@
+/*
+ * Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ * Author: Hans-J. Boehm (boehm@parc.xerox.com)
+ */
+/* Boehm, October 5, 1995 4:20 pm PDT */
+
+/*
+ * Cords are immutable character strings. A number of operations
+ * on long cords are much more efficient than their strings.h counterpart.
+ * In particular, concatenation takes constant time independent of the length
+ * of the arguments. (Cords are represented as trees, with internal
+ * nodes representing concatenation and leaves consisting of either C
+ * strings or a functional description of the string.)
+ *
+ * The following are reasonable applications of cords. They would perform
+ * unacceptably if C strings were used:
+ * - A compiler that produces assembly language output by repeatedly
+ * concatenating instructions onto a cord representing the output file.
+ * - A text editor that converts the input file to a cord, and then
+ * performs editing operations by producing a new cord representing
+ * the file after echa character change (and keeping the old ones in an
+ * edit history)
+ *
+ * For optimal performance, cords should be built by
+ * concatenating short sections.
+ * This interface is designed for maximum compatibility with C strings.
+ * ASCII NUL characters may be embedded in cords using CORD_from_fn.
+ * This is handled correctly, but CORD_to_char_star will produce a string
+ * with embedded NULs when given such a cord.
+ *
+ * This interface is fairly big, largely for performance reasons.
+ * The most basic constants and functions:
+ *
+ * CORD - the type fo a cord;
+ * CORD_EMPTY - empty cord;
+ * CORD_len(cord) - length of a cord;
+ * CORD_cat(cord1,cord2) - concatenation of two cords;
+ * CORD_substr(cord, start, len) - substring (or subcord);
+ * CORD_pos i; CORD_FOR(i, cord) { ... CORD_pos_fetch(i) ... } -
+ * examine each character in a cord. CORD_pos_fetch(i) is the char.
+ * CORD_fetch(int i) - Retrieve i'th character (slowly).
+ * CORD_cmp(cord1, cord2) - compare two cords.
+ * CORD_from_file(FILE * f) - turn a read-only file into a cord.
+ * CORD_to_char_star(cord) - convert to C string.
+ * (Non-NULL C constant strings are cords.)
+ * CORD_printf (etc.) - cord version of printf. Use %r for cords.
+ */
+# ifndef CORD_H
+
+# define CORD_H
+# include <stddef.h>
+# include <stdio.h>
+/* Cords have type const char *. This is cheating quite a bit, and not */
+/* 100% portable. But it means that nonempty character string */
+/* constants may be used as cords directly, provided the string is */
+/* never modified in place. The empty cord is represented by, and */
+/* can be written as, 0. */
+
+typedef const char * CORD;
+
+/* An empty cord is always represented as nil */
+# define CORD_EMPTY 0
+
+/* Is a nonempty cord represented as a C string? */
+#define CORD_IS_STRING(s) (*(s) != '\0')
+
+/* Concatenate two cords. If the arguments are C strings, they may */
+/* not be subsequently altered. */
+CORD CORD_cat(CORD x, CORD y);
+
+/* Concatenate a cord and a C string with known length. Except for the */
+/* empty string case, this is a special case of CORD_cat. Since the */
+/* length is known, it can be faster. */
+/* The string y is shared with the resulting CORD. Hence it should */
+/* not be altered by the caller. */
+CORD CORD_cat_char_star(CORD x, const char * y, size_t leny);
+
+/* Compute the length of a cord */
+size_t CORD_len(CORD x);
+
+/* Cords may be represented by functions defining the ith character */
+typedef char (* CORD_fn)(size_t i, void * client_data);
+
+/* Turn a functional description into a cord. */
+CORD CORD_from_fn(CORD_fn fn, void * client_data, size_t len);
+
+/* Return the substring (subcord really) of x with length at most n, */
+/* starting at position i. (The initial character has position 0.) */
+CORD CORD_substr(CORD x, size_t i, size_t n);
+
+/* Return the argument, but rebalanced to allow more efficient */
+/* character retrieval, substring operations, and comparisons. */
+/* This is useful only for cords that were built using repeated */
+/* concatenation. Guarantees log time access to the result, unless */
+/* x was obtained through a large number of repeated substring ops */
+/* or the embedded functional descriptions take longer to evaluate. */
+/* May reallocate significant parts of the cord. The argument is not */
+/* modified; only the result is balanced. */
+CORD CORD_balance(CORD x);
+
+/* The following traverse a cord by applying a function to each */
+/* character. This is occasionally appropriate, especially where */
+/* speed is crucial. But, since C doesn't have nested functions, */
+/* clients of this sort of traversal are clumsy to write. Consider */
+/* the functions that operate on cord positions instead. */
+
+/* Function to iteratively apply to individual characters in cord. */
+typedef int (* CORD_iter_fn)(char c, void * client_data);
+
+/* Function to apply to substrings of a cord. Each substring is a */
+/* a C character string, not a general cord. */
+typedef int (* CORD_batched_iter_fn)(const char * s, void * client_data);
+# define CORD_NO_FN ((CORD_batched_iter_fn)0)
+
+/* Apply f1 to each character in the cord, in ascending order, */
+/* starting at position i. If */
+/* f2 is not CORD_NO_FN, then multiple calls to f1 may be replaced by */
+/* a single call to f2. The parameter f2 is provided only to allow */
+/* some optimization by the client. This terminates when the right */
+/* end of this string is reached, or when f1 or f2 return != 0. In the */
+/* latter case CORD_iter returns != 0. Otherwise it returns 0. */
+/* The specified value of i must be < CORD_len(x). */
+int CORD_iter5(CORD x, size_t i, CORD_iter_fn f1,
+ CORD_batched_iter_fn f2, void * client_data);
+
+/* A simpler version that starts at 0, and without f2: */
+int CORD_iter(CORD x, CORD_iter_fn f1, void * client_data);
+# define CORD_iter(x, f1, cd) CORD_iter5(x, 0, f1, CORD_NO_FN, cd)
+
+/* Similar to CORD_iter5, but end-to-beginning. No provisions for */
+/* CORD_batched_iter_fn. */
+int CORD_riter4(CORD x, size_t i, CORD_iter_fn f1, void * client_data);
+
+/* A simpler version that starts at the end: */
+int CORD_riter(CORD x, CORD_iter_fn f1, void * client_data);
+
+/* Functions that operate on cord positions. The easy way to traverse */
+/* cords. A cord position is logically a pair consisting of a cord */
+/* and an index into that cord. But it is much faster to retrieve a */
+/* charcter based on a position than on an index. Unfortunately, */
+/* positions are big (order of a few 100 bytes), so allocate them with */
+/* caution. */
+/* Things in cord_pos.h should be treated as opaque, except as */
+/* described below. Also note that */
+/* CORD_pos_fetch, CORD_next and CORD_prev have both macro and function */
+/* definitions. The former may evaluate their argument more than once. */
+# include "private/cord_pos.h"
+
+/*
+ Visible definitions from above:
+
+ typedef <OPAQUE but fairly big> CORD_pos[1];
+
+ * Extract the cord from a position:
+ CORD CORD_pos_to_cord(CORD_pos p);
+
+ * Extract the current index from a position:
+ size_t CORD_pos_to_index(CORD_pos p);
+
+ * Fetch the character located at the given position:
+ char CORD_pos_fetch(CORD_pos p);
+
+ * Initialize the position to refer to the given cord and index.
+ * Note that this is the most expensive function on positions:
+ void CORD_set_pos(CORD_pos p, CORD x, size_t i);
+
+ * Advance the position to the next character.
+ * P must be initialized and valid.
+ * Invalidates p if past end:
+ void CORD_next(CORD_pos p);
+
+ * Move the position to the preceding character.
+ * P must be initialized and valid.
+ * Invalidates p if past beginning:
+ void CORD_prev(CORD_pos p);
+
+ * Is the position valid, i.e. inside the cord?
+ int CORD_pos_valid(CORD_pos p);
+*/
+# define CORD_FOR(pos, cord) \
+ for (CORD_set_pos(pos, cord, 0); CORD_pos_valid(pos); CORD_next(pos))
+
+
+/* An out of memory handler to call. May be supplied by client. */
+/* Must not return. */
+extern void (* CORD_oom_fn)(void);
+
+/* Dump the representation of x to stdout in an implementation defined */
+/* manner. Intended for debugging only. */
+void CORD_dump(CORD x);
+
+/* The following could easily be implemented by the client. They are */
+/* provided in cordxtra.c for convenience. */
+
+/* Concatenate a character to the end of a cord. */
+CORD CORD_cat_char(CORD x, char c);
+
+/* Concatenate n cords. */
+CORD CORD_catn(int n, /* CORD */ ...);
+
+/* Return the character in CORD_substr(x, i, 1) */
+char CORD_fetch(CORD x, size_t i);
+
+/* Return < 0, 0, or > 0, depending on whether x < y, x = y, x > y */
+int CORD_cmp(CORD x, CORD y);
+
+/* A generalization that takes both starting positions for the */
+/* comparison, and a limit on the number of characters to be compared. */
+int CORD_ncmp(CORD x, size_t x_start, CORD y, size_t y_start, size_t len);
+
+/* Find the first occurrence of s in x at position start or later. */
+/* Return the position of the first character of s in x, or */
+/* CORD_NOT_FOUND if there is none. */
+size_t CORD_str(CORD x, size_t start, CORD s);
+
+/* Return a cord consisting of i copies of (possibly NUL) c. Dangerous */
+/* in conjunction with CORD_to_char_star. */
+/* The resulting representation takes constant space, independent of i. */
+CORD CORD_chars(char c, size_t i);
+# define CORD_nul(i) CORD_chars('\0', (i))
+
+/* Turn a file into cord. The file must be seekable. Its contents */
+/* must remain constant. The file may be accessed as an immediate */
+/* result of this call and/or as a result of subsequent accesses to */
+/* the cord. Short files are likely to be immediately read, but */
+/* long files are likely to be read on demand, possibly relying on */
+/* stdio for buffering. */
+/* We must have exclusive access to the descriptor f, i.e. we may */
+/* read it at any time, and expect the file pointer to be */
+/* where we left it. Normally this should be invoked as */
+/* CORD_from_file(fopen(...)) */
+/* CORD_from_file arranges to close the file descriptor when it is no */
+/* longer needed (e.g. when the result becomes inaccessible). */
+/* The file f must be such that ftell reflects the actual character */
+/* position in the file, i.e. the number of characters that can be */
+/* or were read with fread. On UNIX systems this is always true. On */
+/* MS Windows systems, f must be opened in binary mode. */
+CORD CORD_from_file(FILE * f);
+
+/* Equivalent to the above, except that the entire file will be read */
+/* and the file pointer will be closed immediately. */
+/* The binary mode restriction from above does not apply. */
+CORD CORD_from_file_eager(FILE * f);
+
+/* Equivalent to the above, except that the file will be read on demand.*/
+/* The binary mode restriction applies. */
+CORD CORD_from_file_lazy(FILE * f);
+
+/* Turn a cord into a C string. The result shares no structure with */
+/* x, and is thus modifiable. */
+char * CORD_to_char_star(CORD x);
+
+/* Turn a C string into a CORD. The C string is copied, and so may */
+/* subsequently be modified. */
+CORD CORD_from_char_star(const char *s);
+
+/* Identical to the above, but the result may share structure with */
+/* the argument and is thus not modifiable. */
+const char * CORD_to_const_char_star(CORD x);
+
+/* Write a cord to a file, starting at the current position. No */
+/* trailing NULs are newlines are added. */
+/* Returns EOF if a write error occurs, 1 otherwise. */
+int CORD_put(CORD x, FILE * f);
+
+/* "Not found" result for the following two functions. */
+# define CORD_NOT_FOUND ((size_t)(-1))
+
+/* A vague analog of strchr. Returns the position (an integer, not */
+/* a pointer) of the first occurrence of (char) c inside x at position */
+/* i or later. The value i must be < CORD_len(x). */
+size_t CORD_chr(CORD x, size_t i, int c);
+
+/* A vague analog of strrchr. Returns index of the last occurrence */
+/* of (char) c inside x at position i or earlier. The value i */
+/* must be < CORD_len(x). */
+size_t CORD_rchr(CORD x, size_t i, int c);
+
+
+/* The following are also not primitive, but are implemented in */
+/* cordprnt.c. They provide functionality similar to the ANSI C */
+/* functions with corresponding names, but with the following */
+/* additions and changes: */
+/* 1. A %r conversion specification specifies a CORD argument. Field */
+/* width, precision, etc. have the same semantics as for %s. */
+/* (Note that %c,%C, and %S were already taken.) */
+/* 2. The format string is represented as a CORD. */
+/* 3. CORD_sprintf and CORD_vsprintf assign the result through the 1st */ /* argument. Unlike their ANSI C versions, there is no need to guess */
+/* the correct buffer size. */
+/* 4. Most of the conversions are implement through the native */
+/* vsprintf. Hence they are usually no faster, and */
+/* idiosyncracies of the native printf are preserved. However, */
+/* CORD arguments to CORD_sprintf and CORD_vsprintf are NOT copied; */
+/* the result shares the original structure. This may make them */
+/* very efficient in some unusual applications. */
+/* The format string is copied. */
+/* All functions return the number of characters generated or -1 on */
+/* error. This complies with the ANSI standard, but is inconsistent */
+/* with some older implementations of sprintf. */
+
+/* The implementation of these is probably less portable than the rest */
+/* of this package. */
+
+#ifndef CORD_NO_IO
+
+#include <stdarg.h>
+
+int CORD_sprintf(CORD * out, CORD format, ...);
+int CORD_vsprintf(CORD * out, CORD format, va_list args);
+int CORD_fprintf(FILE * f, CORD format, ...);
+int CORD_vfprintf(FILE * f, CORD format, va_list args);
+int CORD_printf(CORD format, ...);
+int CORD_vprintf(CORD format, va_list args);
+
+#endif /* CORD_NO_IO */
+
+# endif /* CORD_H */
diff --git a/gc/cord/cordbscs.c b/gc/cord/cordbscs.c
new file mode 100644
index 0000000..9fc894d
--- /dev/null
+++ b/gc/cord/cordbscs.c
@@ -0,0 +1,915 @@
+/*
+ * Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ * Author: Hans-J. Boehm (boehm@parc.xerox.com)
+ */
+/* Boehm, October 3, 1994 5:19 pm PDT */
+# include "gc.h"
+# include "cord.h"
+# include <stdlib.h>
+# include <stdio.h>
+# include <string.h>
+
+/* An implementation of the cord primitives. These are the only */
+/* Functions that understand the representation. We perform only */
+/* minimal checks on arguments to these functions. Out of bounds */
+/* arguments to the iteration functions may result in client functions */
+/* invoked on garbage data. In most cases, client functions should be */
+/* programmed defensively enough that this does not result in memory */
+/* smashes. */
+
+typedef void (* oom_fn)(void);
+
+oom_fn CORD_oom_fn = (oom_fn) 0;
+
+# define OUT_OF_MEMORY { if (CORD_oom_fn != (oom_fn) 0) (*CORD_oom_fn)(); \
+ ABORT("Out of memory\n"); }
+# define ABORT(msg) { fprintf(stderr, "%s\n", msg); abort(); }
+
+typedef unsigned long word;
+
+typedef union {
+ struct Concatenation {
+ char null;
+ char header;
+ char depth; /* concatenation nesting depth. */
+ unsigned char left_len;
+ /* Length of left child if it is sufficiently */
+ /* short; 0 otherwise. */
+# define MAX_LEFT_LEN 255
+ word len;
+ CORD left; /* length(left) > 0 */
+ CORD right; /* length(right) > 0 */
+ } concatenation;
+ struct Function {
+ char null;
+ char header;
+ char depth; /* always 0 */
+ char left_len; /* always 0 */
+ word len;
+ CORD_fn fn;
+ void * client_data;
+ } function;
+ struct Generic {
+ char null;
+ char header;
+ char depth;
+ char left_len;
+ word len;
+ } generic;
+ char string[1];
+} CordRep;
+
+# define CONCAT_HDR 1
+
+# define FN_HDR 4
+# define SUBSTR_HDR 6
+ /* Substring nodes are a special case of function nodes. */
+ /* The client_data field is known to point to a substr_args */
+ /* structure, and the function is either CORD_apply_access_fn */
+ /* or CORD_index_access_fn. */
+
+/* The following may be applied only to function and concatenation nodes: */
+#define IS_CONCATENATION(s) (((CordRep *)s)->generic.header == CONCAT_HDR)
+
+#define IS_FUNCTION(s) ((((CordRep *)s)->generic.header & FN_HDR) != 0)
+
+#define IS_SUBSTR(s) (((CordRep *)s)->generic.header == SUBSTR_HDR)
+
+#define LEN(s) (((CordRep *)s) -> generic.len)
+#define DEPTH(s) (((CordRep *)s) -> generic.depth)
+#define GEN_LEN(s) (CORD_IS_STRING(s) ? strlen(s) : LEN(s))
+
+#define LEFT_LEN(c) ((c) -> left_len != 0? \
+ (c) -> left_len \
+ : (CORD_IS_STRING((c) -> left) ? \
+ (c) -> len - GEN_LEN((c) -> right) \
+ : LEN((c) -> left)))
+
+#define SHORT_LIMIT (sizeof(CordRep) - 1)
+ /* Cords shorter than this are C strings */
+
+
+/* Dump the internal representation of x to stdout, with initial */
+/* indentation level n. */
+void CORD_dump_inner(CORD x, unsigned n)
+{
+ register size_t i;
+
+ for (i = 0; i < (size_t)n; i++) {
+ fputs(" ", stdout);
+ }
+ if (x == 0) {
+ fputs("NIL\n", stdout);
+ } else if (CORD_IS_STRING(x)) {
+ for (i = 0; i <= SHORT_LIMIT; i++) {
+ if (x[i] == '\0') break;
+ putchar(x[i]);
+ }
+ if (x[i] != '\0') fputs("...", stdout);
+ putchar('\n');
+ } else if (IS_CONCATENATION(x)) {
+ register struct Concatenation * conc =
+ &(((CordRep *)x) -> concatenation);
+ printf("Concatenation: %p (len: %d, depth: %d)\n",
+ x, (int)(conc -> len), (int)(conc -> depth));
+ CORD_dump_inner(conc -> left, n+1);
+ CORD_dump_inner(conc -> right, n+1);
+ } else /* function */{
+ register struct Function * func =
+ &(((CordRep *)x) -> function);
+ if (IS_SUBSTR(x)) printf("(Substring) ");
+ printf("Function: %p (len: %d): ", x, (int)(func -> len));
+ for (i = 0; i < 20 && i < func -> len; i++) {
+ putchar((*(func -> fn))(i, func -> client_data));
+ }
+ if (i < func -> len) fputs("...", stdout);
+ putchar('\n');
+ }
+}
+
+/* Dump the internal representation of x to stdout */
+void CORD_dump(CORD x)
+{
+ CORD_dump_inner(x, 0);
+ fflush(stdout);
+}
+
+CORD CORD_cat_char_star(CORD x, const char * y, size_t leny)
+{
+ register size_t result_len;
+ register size_t lenx;
+ register int depth;
+
+ if (x == CORD_EMPTY) return(y);
+ if (leny == 0) return(x);
+ if (CORD_IS_STRING(x)) {
+ lenx = strlen(x);
+ result_len = lenx + leny;
+ if (result_len <= SHORT_LIMIT) {
+ register char * result = GC_MALLOC_ATOMIC(result_len+1);
+
+ if (result == 0) OUT_OF_MEMORY;
+ memcpy(result, x, lenx);
+ memcpy(result + lenx, y, leny);
+ result[result_len] = '\0';
+ return((CORD) result);
+ } else {
+ depth = 1;
+ }
+ } else {
+ register CORD right;
+ register CORD left;
+ register char * new_right;
+ register size_t right_len;
+
+ lenx = LEN(x);
+
+ if (leny <= SHORT_LIMIT/2
+ && IS_CONCATENATION(x)
+ && CORD_IS_STRING(right = ((CordRep *)x) -> concatenation.right)) {
+ /* Merge y into right part of x. */
+ if (!CORD_IS_STRING(left = ((CordRep *)x) -> concatenation.left)) {
+ right_len = lenx - LEN(left);
+ } else if (((CordRep *)x) -> concatenation.left_len != 0) {
+ right_len = lenx - ((CordRep *)x) -> concatenation.left_len;
+ } else {
+ right_len = strlen(right);
+ }
+ result_len = right_len + leny; /* length of new_right */
+ if (result_len <= SHORT_LIMIT) {
+ new_right = GC_MALLOC_ATOMIC(result_len + 1);
+ memcpy(new_right, right, right_len);
+ memcpy(new_right + right_len, y, leny);
+ new_right[result_len] = '\0';
+ y = new_right;
+ leny = result_len;
+ x = left;
+ lenx -= right_len;
+ /* Now fall through to concatenate the two pieces: */
+ }
+ if (CORD_IS_STRING(x)) {
+ depth = 1;
+ } else {
+ depth = DEPTH(x) + 1;
+ }
+ } else {
+ depth = DEPTH(x) + 1;
+ }
+ result_len = lenx + leny;
+ }
+ {
+ /* The general case; lenx, result_len is known: */
+ register struct Concatenation * result;
+
+ result = GC_NEW(struct Concatenation);
+ if (result == 0) OUT_OF_MEMORY;
+ result->header = CONCAT_HDR;
+ result->depth = depth;
+ if (lenx <= MAX_LEFT_LEN) result->left_len = lenx;
+ result->len = result_len;
+ result->left = x;
+ result->right = y;
+ if (depth > MAX_DEPTH) {
+ return(CORD_balance((CORD)result));
+ } else {
+ return((CORD) result);
+ }
+ }
+}
+
+
+CORD CORD_cat(CORD x, CORD y)
+{
+ register size_t result_len;
+ register int depth;
+ register size_t lenx;
+
+ if (x == CORD_EMPTY) return(y);
+ if (y == CORD_EMPTY) return(x);
+ if (CORD_IS_STRING(y)) {
+ return(CORD_cat_char_star(x, y, strlen(y)));
+ } else if (CORD_IS_STRING(x)) {
+ lenx = strlen(x);
+ depth = DEPTH(y) + 1;
+ } else {
+ register int depthy = DEPTH(y);
+
+ lenx = LEN(x);
+ depth = DEPTH(x) + 1;
+ if (depthy >= depth) depth = depthy + 1;
+ }
+ result_len = lenx + LEN(y);
+ {
+ register struct Concatenation * result;
+
+ result = GC_NEW(struct Concatenation);
+ if (result == 0) OUT_OF_MEMORY;
+ result->header = CONCAT_HDR;
+ result->depth = depth;
+ if (lenx <= MAX_LEFT_LEN) result->left_len = lenx;
+ result->len = result_len;
+ result->left = x;
+ result->right = y;
+ return((CORD) result);
+ }
+}
+
+
+
+CORD CORD_from_fn(CORD_fn fn, void * client_data, size_t len)
+{
+ if (len <= 0) return(0);
+ if (len <= SHORT_LIMIT) {
+ register char * result;
+ register size_t i;
+ char buf[SHORT_LIMIT+1];
+ register char c;
+
+ for (i = 0; i < len; i++) {
+ c = (*fn)(i, client_data);
+ if (c == '\0') goto gen_case;
+ buf[i] = c;
+ }
+ buf[i] = '\0';
+ result = GC_MALLOC_ATOMIC(len+1);
+ if (result == 0) OUT_OF_MEMORY;
+ strcpy(result, buf);
+ result[len] = '\0';
+ return((CORD) result);
+ }
+ gen_case:
+ {
+ register struct Function * result;
+
+ result = GC_NEW(struct Function);
+ if (result == 0) OUT_OF_MEMORY;
+ result->header = FN_HDR;
+ /* depth is already 0 */
+ result->len = len;
+ result->fn = fn;
+ result->client_data = client_data;
+ return((CORD) result);
+ }
+}
+
+size_t CORD_len(CORD x)
+{
+ if (x == 0) {
+ return(0);
+ } else {
+ return(GEN_LEN(x));
+ }
+}
+
+struct substr_args {
+ CordRep * sa_cord;
+ size_t sa_index;
+};
+
+char CORD_index_access_fn(size_t i, void * client_data)
+{
+ register struct substr_args *descr = (struct substr_args *)client_data;
+
+ return(((char *)(descr->sa_cord))[i + descr->sa_index]);
+}
+
+char CORD_apply_access_fn(size_t i, void * client_data)
+{
+ register struct substr_args *descr = (struct substr_args *)client_data;
+ register struct Function * fn_cord = &(descr->sa_cord->function);
+
+ return((*(fn_cord->fn))(i + descr->sa_index, fn_cord->client_data));
+}
+
+/* A version of CORD_substr that simply returns a function node, thus */
+/* postponing its work. The fourth argument is a function that may */
+/* be used for efficient access to the ith character. */
+/* Assumes i >= 0 and i + n < length(x). */
+CORD CORD_substr_closure(CORD x, size_t i, size_t n, CORD_fn f)
+{
+ register struct substr_args * sa = GC_NEW(struct substr_args);
+ CORD result;
+
+ if (sa == 0) OUT_OF_MEMORY;
+ sa->sa_cord = (CordRep *)x;
+ sa->sa_index = i;
+ result = CORD_from_fn(f, (void *)sa, n);
+ ((CordRep *)result) -> function.header = SUBSTR_HDR;
+ return (result);
+}
+
+# define SUBSTR_LIMIT (10 * SHORT_LIMIT)
+ /* Substrings of function nodes and flat strings shorter than */
+ /* this are flat strings. Othewise we use a functional */
+ /* representation, which is significantly slower to access. */
+
+/* A version of CORD_substr that assumes i >= 0, n > 0, and i + n < length(x).*/
+CORD CORD_substr_checked(CORD x, size_t i, size_t n)
+{
+ if (CORD_IS_STRING(x)) {
+ if (n > SUBSTR_LIMIT) {
+ return(CORD_substr_closure(x, i, n, CORD_index_access_fn));
+ } else {
+ register char * result = GC_MALLOC_ATOMIC(n+1);
+
+ if (result == 0) OUT_OF_MEMORY;
+ strncpy(result, x+i, n);
+ result[n] = '\0';
+ return(result);
+ }
+ } else if (IS_CONCATENATION(x)) {
+ register struct Concatenation * conc
+ = &(((CordRep *)x) -> concatenation);
+ register size_t left_len;
+ register size_t right_len;
+
+ left_len = LEFT_LEN(conc);
+ right_len = conc -> len - left_len;
+ if (i >= left_len) {
+ if (n == right_len) return(conc -> right);
+ return(CORD_substr_checked(conc -> right, i - left_len, n));
+ } else if (i+n <= left_len) {
+ if (n == left_len) return(conc -> left);
+ return(CORD_substr_checked(conc -> left, i, n));
+ } else {
+ /* Need at least one character from each side. */
+ register CORD left_part;
+ register CORD right_part;
+ register size_t left_part_len = left_len - i;
+
+ if (i == 0) {
+ left_part = conc -> left;
+ } else {
+ left_part = CORD_substr_checked(conc -> left, i, left_part_len);
+ }
+ if (i + n == right_len + left_len) {
+ right_part = conc -> right;
+ } else {
+ right_part = CORD_substr_checked(conc -> right, 0,
+ n - left_part_len);
+ }
+ return(CORD_cat(left_part, right_part));
+ }
+ } else /* function */ {
+ if (n > SUBSTR_LIMIT) {
+ if (IS_SUBSTR(x)) {
+ /* Avoid nesting substring nodes. */
+ register struct Function * f = &(((CordRep *)x) -> function);
+ register struct substr_args *descr =
+ (struct substr_args *)(f -> client_data);
+
+ return(CORD_substr_closure((CORD)descr->sa_cord,
+ i + descr->sa_index,
+ n, f -> fn));
+ } else {
+ return(CORD_substr_closure(x, i, n, CORD_apply_access_fn));
+ }
+ } else {
+ char * result;
+ register struct Function * f = &(((CordRep *)x) -> function);
+ char buf[SUBSTR_LIMIT+1];
+ register char * p = buf;
+ register char c;
+ register int j;
+ register int lim = i + n;
+
+ for (j = i; j < lim; j++) {
+ c = (*(f -> fn))(j, f -> client_data);
+ if (c == '\0') {
+ return(CORD_substr_closure(x, i, n, CORD_apply_access_fn));
+ }
+ *p++ = c;
+ }
+ *p = '\0';
+ result = GC_MALLOC_ATOMIC(n+1);
+ if (result == 0) OUT_OF_MEMORY;
+ strcpy(result, buf);
+ return(result);
+ }
+ }
+}
+
+CORD CORD_substr(CORD x, size_t i, size_t n)
+{
+ register size_t len = CORD_len(x);
+
+ if (i >= len || n <= 0) return(0);
+ /* n < 0 is impossible in a correct C implementation, but */
+ /* quite possible under SunOS 4.X. */
+ if (i + n > len) n = len - i;
+# ifndef __STDC__
+ if (i < 0) ABORT("CORD_substr: second arg. negative");
+ /* Possible only if both client and C implementation are buggy. */
+ /* But empirically this happens frequently. */
+# endif
+ return(CORD_substr_checked(x, i, n));
+}
+
+/* See cord.h for definition. We assume i is in range. */
+int CORD_iter5(CORD x, size_t i, CORD_iter_fn f1,
+ CORD_batched_iter_fn f2, void * client_data)
+{
+ if (x == 0) return(0);
+ if (CORD_IS_STRING(x)) {
+ register const char *p = x+i;
+
+ if (*p == '\0') ABORT("2nd arg to CORD_iter5 too big");
+ if (f2 != CORD_NO_FN) {
+ return((*f2)(p, client_data));
+ } else {
+ while (*p) {
+ if ((*f1)(*p, client_data)) return(1);
+ p++;
+ }
+ return(0);
+ }
+ } else if (IS_CONCATENATION(x)) {
+ register struct Concatenation * conc
+ = &(((CordRep *)x) -> concatenation);
+
+
+ if (i > 0) {
+ register size_t left_len = LEFT_LEN(conc);
+
+ if (i >= left_len) {
+ return(CORD_iter5(conc -> right, i - left_len, f1, f2,
+ client_data));
+ }
+ }
+ if (CORD_iter5(conc -> left, i, f1, f2, client_data)) {
+ return(1);
+ }
+ return(CORD_iter5(conc -> right, 0, f1, f2, client_data));
+ } else /* function */ {
+ register struct Function * f = &(((CordRep *)x) -> function);
+ register size_t j;
+ register size_t lim = f -> len;
+
+ for (j = i; j < lim; j++) {
+ if ((*f1)((*(f -> fn))(j, f -> client_data), client_data)) {
+ return(1);
+ }
+ }
+ return(0);
+ }
+}
+
+#undef CORD_iter
+int CORD_iter(CORD x, CORD_iter_fn f1, void * client_data)
+{
+ return(CORD_iter5(x, 0, f1, CORD_NO_FN, client_data));
+}
+
+int CORD_riter4(CORD x, size_t i, CORD_iter_fn f1, void * client_data)
+{
+ if (x == 0) return(0);
+ if (CORD_IS_STRING(x)) {
+ register const char *p = x + i;
+ register char c;
+
+ for(;;) {
+ c = *p;
+ if (c == '\0') ABORT("2nd arg to CORD_riter4 too big");
+ if ((*f1)(c, client_data)) return(1);
+ if (p == x) break;
+ p--;
+ }
+ return(0);
+ } else if (IS_CONCATENATION(x)) {
+ register struct Concatenation * conc
+ = &(((CordRep *)x) -> concatenation);
+ register CORD left_part = conc -> left;
+ register size_t left_len;
+
+ left_len = LEFT_LEN(conc);
+ if (i >= left_len) {
+ if (CORD_riter4(conc -> right, i - left_len, f1, client_data)) {
+ return(1);
+ }
+ return(CORD_riter4(left_part, left_len - 1, f1, client_data));
+ } else {
+ return(CORD_riter4(left_part, i, f1, client_data));
+ }
+ } else /* function */ {
+ register struct Function * f = &(((CordRep *)x) -> function);
+ register size_t j;
+
+ for (j = i; ; j--) {
+ if ((*f1)((*(f -> fn))(j, f -> client_data), client_data)) {
+ return(1);
+ }
+ if (j == 0) return(0);
+ }
+ }
+}
+
+int CORD_riter(CORD x, CORD_iter_fn f1, void * client_data)
+{
+ return(CORD_riter4(x, CORD_len(x) - 1, f1, client_data));
+}
+
+/*
+ * The following functions are concerned with balancing cords.
+ * Strategy:
+ * Scan the cord from left to right, keeping the cord scanned so far
+ * as a forest of balanced trees of exponentialy decreasing length.
+ * When a new subtree needs to be added to the forest, we concatenate all
+ * shorter ones to the new tree in the appropriate order, and then insert
+ * the result into the forest.
+ * Crucial invariants:
+ * 1. The concatenation of the forest (in decreasing order) with the
+ * unscanned part of the rope is equal to the rope being balanced.
+ * 2. All trees in the forest are balanced.
+ * 3. forest[i] has depth at most i.
+ */
+
+typedef struct {
+ CORD c;
+ size_t len; /* Actual length of c */
+} ForestElement;
+
+static size_t min_len [ MAX_DEPTH ];
+
+static int min_len_init = 0;
+
+int CORD_max_len;
+
+typedef ForestElement Forest [ MAX_DEPTH ];
+ /* forest[i].len >= fib(i+1) */
+ /* The string is the concatenation */
+ /* of the forest in order of DECREASING */
+ /* indices. */
+
+void CORD_init_min_len()
+{
+ register int i;
+ register size_t last, previous, current;
+
+ min_len[0] = previous = 1;
+ min_len[1] = last = 2;
+ for (i = 2; i < MAX_DEPTH; i++) {
+ current = last + previous;
+ if (current < last) /* overflow */ current = last;
+ min_len[i] = current;
+ previous = last;
+ last = current;
+ }
+ CORD_max_len = last - 1;
+ min_len_init = 1;
+}
+
+
+void CORD_init_forest(ForestElement * forest, size_t max_len)
+{
+ register int i;
+
+ for (i = 0; i < MAX_DEPTH; i++) {
+ forest[i].c = 0;
+ if (min_len[i] > max_len) return;
+ }
+ ABORT("Cord too long");
+}
+
+/* Add a leaf to the appropriate level in the forest, cleaning */
+/* out lower levels as necessary. */
+/* Also works if x is a balanced tree of concatenations; however */
+/* in this case an extra concatenation node may be inserted above x; */
+/* This node should not be counted in the statement of the invariants. */
+void CORD_add_forest(ForestElement * forest, CORD x, size_t len)
+{
+ register int i = 0;
+ register CORD sum = CORD_EMPTY;
+ register size_t sum_len = 0;
+
+ while (len > min_len[i + 1]) {
+ if (forest[i].c != 0) {
+ sum = CORD_cat(forest[i].c, sum);
+ sum_len += forest[i].len;
+ forest[i].c = 0;
+ }
+ i++;
+ }
+ /* Sum has depth at most 1 greter than what would be required */
+ /* for balance. */
+ sum = CORD_cat(sum, x);
+ sum_len += len;
+ /* If x was a leaf, then sum is now balanced. To see this */
+ /* consider the two cases in which forest[i-1] either is or is */
+ /* not empty. */
+ while (sum_len >= min_len[i]) {
+ if (forest[i].c != 0) {
+ sum = CORD_cat(forest[i].c, sum);
+ sum_len += forest[i].len;
+ /* This is again balanced, since sum was balanced, and has */
+ /* allowable depth that differs from i by at most 1. */
+ forest[i].c = 0;
+ }
+ i++;
+ }
+ i--;
+ forest[i].c = sum;
+ forest[i].len = sum_len;
+}
+
+CORD CORD_concat_forest(ForestElement * forest, size_t expected_len)
+{
+ register int i = 0;
+ CORD sum = 0;
+ size_t sum_len = 0;
+
+ while (sum_len != expected_len) {
+ if (forest[i].c != 0) {
+ sum = CORD_cat(forest[i].c, sum);
+ sum_len += forest[i].len;
+ }
+ i++;
+ }
+ return(sum);
+}
+
+/* Insert the frontier of x into forest. Balanced subtrees are */
+/* treated as leaves. This potentially adds one to the depth */
+/* of the final tree. */
+void CORD_balance_insert(CORD x, size_t len, ForestElement * forest)
+{
+ register int depth;
+
+ if (CORD_IS_STRING(x)) {
+ CORD_add_forest(forest, x, len);
+ } else if (IS_CONCATENATION(x)
+ && ((depth = DEPTH(x)) >= MAX_DEPTH
+ || len < min_len[depth])) {
+ register struct Concatenation * conc
+ = &(((CordRep *)x) -> concatenation);
+ size_t left_len = LEFT_LEN(conc);
+
+ CORD_balance_insert(conc -> left, left_len, forest);
+ CORD_balance_insert(conc -> right, len - left_len, forest);
+ } else /* function or balanced */ {
+ CORD_add_forest(forest, x, len);
+ }
+}
+
+
+CORD CORD_balance(CORD x)
+{
+ Forest forest;
+ register size_t len;
+
+ if (x == 0) return(0);
+ if (CORD_IS_STRING(x)) return(x);
+ if (!min_len_init) CORD_init_min_len();
+ len = LEN(x);
+ CORD_init_forest(forest, len);
+ CORD_balance_insert(x, len, forest);
+ return(CORD_concat_forest(forest, len));
+}
+
+
+/* Position primitives */
+
+/* Private routines to deal with the hard cases only: */
+
+/* P contains a prefix of the path to cur_pos. Extend it to a full */
+/* path and set up leaf info. */
+/* Return 0 if past the end of cord, 1 o.w. */
+void CORD__extend_path(register CORD_pos p)
+{
+ register struct CORD_pe * current_pe = &(p[0].path[p[0].path_len]);
+ register CORD top = current_pe -> pe_cord;
+ register size_t pos = p[0].cur_pos;
+ register size_t top_pos = current_pe -> pe_start_pos;
+ register size_t top_len = GEN_LEN(top);
+
+ /* Fill in the rest of the path. */
+ while(!CORD_IS_STRING(top) && IS_CONCATENATION(top)) {
+ register struct Concatenation * conc =
+ &(((CordRep *)top) -> concatenation);
+ register size_t left_len;
+
+ left_len = LEFT_LEN(conc);
+ current_pe++;
+ if (pos >= top_pos + left_len) {
+ current_pe -> pe_cord = top = conc -> right;
+ current_pe -> pe_start_pos = top_pos = top_pos + left_len;
+ top_len -= left_len;
+ } else {
+ current_pe -> pe_cord = top = conc -> left;
+ current_pe -> pe_start_pos = top_pos;
+ top_len = left_len;
+ }
+ p[0].path_len++;
+ }
+ /* Fill in leaf description for fast access. */
+ if (CORD_IS_STRING(top)) {
+ p[0].cur_leaf = top;
+ p[0].cur_start = top_pos;
+ p[0].cur_end = top_pos + top_len;
+ } else {
+ p[0].cur_end = 0;
+ }
+ if (pos >= top_pos + top_len) p[0].path_len = CORD_POS_INVALID;
+}
+
+char CORD__pos_fetch(register CORD_pos p)
+{
+ /* Leaf is a function node */
+ struct CORD_pe * pe = &((p)[0].path[(p)[0].path_len]);
+ CORD leaf = pe -> pe_cord;
+ register struct Function * f = &(((CordRep *)leaf) -> function);
+
+ if (!IS_FUNCTION(leaf)) ABORT("CORD_pos_fetch: bad leaf");
+ return ((*(f -> fn))(p[0].cur_pos - pe -> pe_start_pos, f -> client_data));
+}
+
+void CORD__next(register CORD_pos p)
+{
+ register size_t cur_pos = p[0].cur_pos + 1;
+ register struct CORD_pe * current_pe = &((p)[0].path[(p)[0].path_len]);
+ register CORD leaf = current_pe -> pe_cord;
+
+ /* Leaf is not a string or we're at end of leaf */
+ p[0].cur_pos = cur_pos;
+ if (!CORD_IS_STRING(leaf)) {
+ /* Function leaf */
+ register struct Function * f = &(((CordRep *)leaf) -> function);
+ register size_t start_pos = current_pe -> pe_start_pos;
+ register size_t end_pos = start_pos + f -> len;
+
+ if (cur_pos < end_pos) {
+ /* Fill cache and return. */
+ register size_t i;
+ register size_t limit = cur_pos + FUNCTION_BUF_SZ;
+ register CORD_fn fn = f -> fn;
+ register void * client_data = f -> client_data;
+
+ if (limit > end_pos) {
+ limit = end_pos;
+ }
+ for (i = cur_pos; i < limit; i++) {
+ p[0].function_buf[i - cur_pos] =
+ (*fn)(i - start_pos, client_data);
+ }
+ p[0].cur_start = cur_pos;
+ p[0].cur_leaf = p[0].function_buf;
+ p[0].cur_end = limit;
+ return;
+ }
+ }
+ /* End of leaf */
+ /* Pop the stack until we find two concatenation nodes with the */
+ /* same start position: this implies we were in left part. */
+ {
+ while (p[0].path_len > 0
+ && current_pe[0].pe_start_pos != current_pe[-1].pe_start_pos) {
+ p[0].path_len--;
+ current_pe--;
+ }
+ if (p[0].path_len == 0) {
+ p[0].path_len = CORD_POS_INVALID;
+ return;
+ }
+ }
+ p[0].path_len--;
+ CORD__extend_path(p);
+}
+
+void CORD__prev(register CORD_pos p)
+{
+ register struct CORD_pe * pe = &(p[0].path[p[0].path_len]);
+
+ if (p[0].cur_pos == 0) {
+ p[0].path_len = CORD_POS_INVALID;
+ return;
+ }
+ p[0].cur_pos--;
+ if (p[0].cur_pos >= pe -> pe_start_pos) return;
+
+ /* Beginning of leaf */
+
+ /* Pop the stack until we find two concatenation nodes with the */
+ /* different start position: this implies we were in right part. */
+ {
+ register struct CORD_pe * current_pe = &((p)[0].path[(p)[0].path_len]);
+
+ while (p[0].path_len > 0
+ && current_pe[0].pe_start_pos == current_pe[-1].pe_start_pos) {
+ p[0].path_len--;
+ current_pe--;
+ }
+ }
+ p[0].path_len--;
+ CORD__extend_path(p);
+}
+
+#undef CORD_pos_fetch
+#undef CORD_next
+#undef CORD_prev
+#undef CORD_pos_to_index
+#undef CORD_pos_to_cord
+#undef CORD_pos_valid
+
+char CORD_pos_fetch(register CORD_pos p)
+{
+ if (p[0].cur_start <= p[0].cur_pos && p[0].cur_pos < p[0].cur_end) {
+ return(p[0].cur_leaf[p[0].cur_pos - p[0].cur_start]);
+ } else {
+ return(CORD__pos_fetch(p));
+ }
+}
+
+void CORD_next(CORD_pos p)
+{
+ if (p[0].cur_pos < p[0].cur_end - 1) {
+ p[0].cur_pos++;
+ } else {
+ CORD__next(p);
+ }
+}
+
+void CORD_prev(CORD_pos p)
+{
+ if (p[0].cur_end != 0 && p[0].cur_pos > p[0].cur_start) {
+ p[0].cur_pos--;
+ } else {
+ CORD__prev(p);
+ }
+}
+
+size_t CORD_pos_to_index(CORD_pos p)
+{
+ return(p[0].cur_pos);
+}
+
+CORD CORD_pos_to_cord(CORD_pos p)
+{
+ return(p[0].path[0].pe_cord);
+}
+
+int CORD_pos_valid(CORD_pos p)
+{
+ return(p[0].path_len != CORD_POS_INVALID);
+}
+
+void CORD_set_pos(CORD_pos p, CORD x, size_t i)
+{
+ if (x == CORD_EMPTY) {
+ p[0].path_len = CORD_POS_INVALID;
+ return;
+ }
+ p[0].path[0].pe_cord = x;
+ p[0].path[0].pe_start_pos = 0;
+ p[0].path_len = 0;
+ p[0].cur_pos = i;
+ CORD__extend_path(p);
+}
diff --git a/gc/cord/cordprnt.c b/gc/cord/cordprnt.c
new file mode 100644
index 0000000..9c8cc87
--- /dev/null
+++ b/gc/cord/cordprnt.c
@@ -0,0 +1,390 @@
+/*
+ * Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+/* An sprintf implementation that understands cords. This is probably */
+/* not terribly portable. It assumes an ANSI stdarg.h. It further */
+/* assumes that I can make copies of va_list variables, and read */
+/* arguments repeatedly by applyting va_arg to the copies. This */
+/* could be avoided at some performance cost. */
+/* We also assume that unsigned and signed integers of various kinds */
+/* have the same sizes, and can be cast back and forth. */
+/* We assume that void * and char * have the same size. */
+/* All this cruft is needed because we want to rely on the underlying */
+/* sprintf implementation whenever possible. */
+/* Boehm, September 21, 1995 6:00 pm PDT */
+
+#include "cord.h"
+#include "ec.h"
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include "gc.h"
+
+#define CONV_SPEC_LEN 50 /* Maximum length of a single */
+ /* conversion specification. */
+#define CONV_RESULT_LEN 50 /* Maximum length of any */
+ /* conversion with default */
+ /* width and prec. */
+
+
+static int ec_len(CORD_ec x)
+{
+ return(CORD_len(x[0].ec_cord) + (x[0].ec_bufptr - x[0].ec_buf));
+}
+
+/* Possible nonumeric precision values. */
+# define NONE -1
+# define VARIABLE -2
+/* Copy the conversion specification from CORD_pos into the buffer buf */
+/* Return negative on error. */
+/* Source initially points one past the leading %. */
+/* It is left pointing at the conversion type. */
+/* Assign field width and precision to *width and *prec. */
+/* If width or prec is *, VARIABLE is assigned. */
+/* Set *left to 1 if left adjustment flag is present. */
+/* Set *long_arg to 1 if long flag ('l' or 'L') is present, or to */
+/* -1 if 'h' is present. */
+static int extract_conv_spec(CORD_pos source, char *buf,
+ int * width, int *prec, int *left, int * long_arg)
+{
+ register int result = 0;
+ register int current_number = 0;
+ register int saw_period = 0;
+ register int saw_number;
+ register int chars_so_far = 0;
+ register char current;
+
+ *width = NONE;
+ buf[chars_so_far++] = '%';
+ while(CORD_pos_valid(source)) {
+ if (chars_so_far >= CONV_SPEC_LEN) return(-1);
+ current = CORD_pos_fetch(source);
+ buf[chars_so_far++] = current;
+ switch(current) {
+ case '*':
+ saw_number = 1;
+ current_number = VARIABLE;
+ break;
+ case '0':
+ if (!saw_number) {
+ /* Zero fill flag; ignore */
+ break;
+ } /* otherwise fall through: */
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ saw_number = 1;
+ current_number *= 10;
+ current_number += current - '0';
+ break;
+ case '.':
+ saw_period = 1;
+ if(saw_number) {
+ *width = current_number;
+ saw_number = 0;
+ }
+ current_number = 0;
+ break;
+ case 'l':
+ case 'L':
+ *long_arg = 1;
+ current_number = 0;
+ break;
+ case 'h':
+ *long_arg = -1;
+ current_number = 0;
+ break;
+ case ' ':
+ case '+':
+ case '#':
+ current_number = 0;
+ break;
+ case '-':
+ *left = 1;
+ current_number = 0;
+ break;
+ case 'd':
+ case 'i':
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ case 'f':
+ case 'e':
+ case 'E':
+ case 'g':
+ case 'G':
+ case 'c':
+ case 'C':
+ case 's':
+ case 'S':
+ case 'p':
+ case 'n':
+ case 'r':
+ goto done;
+ default:
+ return(-1);
+ }
+ CORD_next(source);
+ }
+ return(-1);
+ done:
+ if (saw_number) {
+ if (saw_period) {
+ *prec = current_number;
+ } else {
+ *prec = NONE;
+ *width = current_number;
+ }
+ } else {
+ *prec = NONE;
+ }
+ buf[chars_so_far] = '\0';
+ return(result);
+}
+
+int CORD_vsprintf(CORD * out, CORD format, va_list args)
+{
+ CORD_ec result;
+ register int count;
+ register char current;
+ CORD_pos pos;
+ char conv_spec[CONV_SPEC_LEN + 1];
+
+ CORD_ec_init(result);
+ for (CORD_set_pos(pos, format, 0); CORD_pos_valid(pos); CORD_next(pos)) {
+ current = CORD_pos_fetch(pos);
+ if (current == '%') {
+ CORD_next(pos);
+ if (!CORD_pos_valid(pos)) return(-1);
+ current = CORD_pos_fetch(pos);
+ if (current == '%') {
+ CORD_ec_append(result, current);
+ } else {
+ int width, prec;
+ int left_adj = 0;
+ int long_arg = 0;
+ CORD arg;
+ size_t len;
+
+ if (extract_conv_spec(pos, conv_spec,
+ &width, &prec,
+ &left_adj, &long_arg) < 0) {
+ return(-1);
+ }
+ current = CORD_pos_fetch(pos);
+ switch(current) {
+ case 'n':
+ /* Assign length to next arg */
+ if (long_arg == 0) {
+ int * pos_ptr;
+ pos_ptr = va_arg(args, int *);
+ *pos_ptr = ec_len(result);
+ } else if (long_arg > 0) {
+ long * pos_ptr;
+ pos_ptr = va_arg(args, long *);
+ *pos_ptr = ec_len(result);
+ } else {
+ short * pos_ptr;
+ pos_ptr = va_arg(args, short *);
+ *pos_ptr = ec_len(result);
+ }
+ goto done;
+ case 'r':
+ /* Append cord and any padding */
+ if (width == VARIABLE) width = va_arg(args, int);
+ if (prec == VARIABLE) prec = va_arg(args, int);
+ arg = va_arg(args, CORD);
+ len = CORD_len(arg);
+ if (prec != NONE && len > prec) {
+ if (prec < 0) return(-1);
+ arg = CORD_substr(arg, 0, prec);
+ len = prec;
+ }
+ if (width != NONE && len < width) {
+ char * blanks = GC_MALLOC_ATOMIC(width-len+1);
+
+ memset(blanks, ' ', width-len);
+ blanks[width-len] = '\0';
+ if (left_adj) {
+ arg = CORD_cat(arg, blanks);
+ } else {
+ arg = CORD_cat(blanks, arg);
+ }
+ }
+ CORD_ec_append_cord(result, arg);
+ goto done;
+ case 'c':
+ if (width == NONE && prec == NONE) {
+ register char c;
+
+ c = va_arg(args, char);
+ CORD_ec_append(result, c);
+ goto done;
+ }
+ break;
+ case 's':
+ if (width == NONE && prec == NONE) {
+ char * str = va_arg(args, char *);
+ register char c;
+
+ while (c = *str++) {
+ CORD_ec_append(result, c);
+ }
+ goto done;
+ }
+ break;
+ default:
+ break;
+ }
+ /* Use standard sprintf to perform conversion */
+ {
+ register char * buf;
+ va_list vsprintf_args = args;
+ /* The above does not appear to be sanctioned */
+ /* by the ANSI C standard. */
+ int max_size = 0;
+ int res;
+
+ if (width == VARIABLE) width = va_arg(args, int);
+ if (prec == VARIABLE) prec = va_arg(args, int);
+ if (width != NONE) max_size = width;
+ if (prec != NONE && prec > max_size) max_size = prec;
+ max_size += CONV_RESULT_LEN;
+ if (max_size >= CORD_BUFSZ) {
+ buf = GC_MALLOC_ATOMIC(max_size + 1);
+ } else {
+ if (CORD_BUFSZ - (result[0].ec_bufptr-result[0].ec_buf)
+ < max_size) {
+ CORD_ec_flush_buf(result);
+ }
+ buf = result[0].ec_bufptr;
+ }
+ switch(current) {
+ case 'd':
+ case 'i':
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ case 'c':
+ if (long_arg <= 0) {
+ (void) va_arg(args, int);
+ } else if (long_arg > 0) {
+ (void) va_arg(args, long);
+ }
+ break;
+ case 's':
+ case 'p':
+ (void) va_arg(args, char *);
+ break;
+ case 'f':
+ case 'e':
+ case 'E':
+ case 'g':
+ case 'G':
+ (void) va_arg(args, double);
+ break;
+ default:
+ return(-1);
+ }
+ res = vsprintf(buf, conv_spec, vsprintf_args);
+ len = (size_t)res;
+ if ((char *)(GC_word)res == buf) {
+ /* old style vsprintf */
+ len = strlen(buf);
+ } else if (res < 0) {
+ return(-1);
+ }
+ if (buf != result[0].ec_bufptr) {
+ register char c;
+
+ while (c = *buf++) {
+ CORD_ec_append(result, c);
+ }
+ } else {
+ result[0].ec_bufptr = buf + len;
+ }
+ }
+ done:;
+ }
+ } else {
+ CORD_ec_append(result, current);
+ }
+ }
+ count = ec_len(result);
+ *out = CORD_balance(CORD_ec_to_cord(result));
+ return(count);
+}
+
+int CORD_sprintf(CORD * out, CORD format, ...)
+{
+ va_list args;
+ int result;
+
+ va_start(args, format);
+ result = CORD_vsprintf(out, format, args);
+ va_end(args);
+ return(result);
+}
+
+int CORD_fprintf(FILE * f, CORD format, ...)
+{
+ va_list args;
+ int result;
+ CORD out;
+
+ va_start(args, format);
+ result = CORD_vsprintf(&out, format, args);
+ va_end(args);
+ if (result > 0) CORD_put(out, f);
+ return(result);
+}
+
+int CORD_vfprintf(FILE * f, CORD format, va_list args)
+{
+ int result;
+ CORD out;
+
+ result = CORD_vsprintf(&out, format, args);
+ if (result > 0) CORD_put(out, f);
+ return(result);
+}
+
+int CORD_printf(CORD format, ...)
+{
+ va_list args;
+ int result;
+ CORD out;
+
+ va_start(args, format);
+ result = CORD_vsprintf(&out, format, args);
+ va_end(args);
+ if (result > 0) CORD_put(out, stdout);
+ return(result);
+}
+
+int CORD_vprintf(CORD format, va_list args)
+{
+ int result;
+ CORD out;
+
+ result = CORD_vsprintf(&out, format, args);
+ if (result > 0) CORD_put(out, stdout);
+ return(result);
+}
diff --git a/gc/cord/cordtest.c b/gc/cord/cordtest.c
new file mode 100644
index 0000000..d11d7dd
--- /dev/null
+++ b/gc/cord/cordtest.c
@@ -0,0 +1,228 @@
+/*
+ * Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+/* Boehm, August 24, 1994 11:58 am PDT */
+# include "cord.h"
+# include <string.h>
+# include <stdio.h>
+/* This is a very incomplete test of the cord package. It knows about */
+/* a few internals of the package (e.g. when C strings are returned) */
+/* that real clients shouldn't rely on. */
+
+# define ABORT(string) \
+{ int x = 0; fprintf(stderr, "FAILED: %s\n", string); x = 1 / x; abort(); }
+
+int count;
+
+int test_fn(char c, void * client_data)
+{
+ if (client_data != (void *)13) ABORT("bad client data");
+ if (count < 64*1024+1) {
+ if ((count & 1) == 0) {
+ if (c != 'b') ABORT("bad char");
+ } else {
+ if (c != 'a') ABORT("bad char");
+ }
+ count++;
+ return(0);
+ } else {
+ if (c != 'c') ABORT("bad char");
+ count++;
+ return(1);
+ }
+}
+
+char id_cord_fn(size_t i, void * client_data)
+{
+ return((char)i);
+}
+
+void test_basics()
+{
+ CORD x = CORD_from_char_star("ab");
+ register int i;
+ char c;
+ CORD y;
+ CORD_pos p;
+
+ x = CORD_cat(x,x);
+ if (!CORD_IS_STRING(x)) ABORT("short cord should usually be a string");
+ if (strcmp(x, "abab") != 0) ABORT("bad CORD_cat result");
+
+ for (i = 1; i < 16; i++) {
+ x = CORD_cat(x,x);
+ }
+ x = CORD_cat(x,"c");
+ if (CORD_len(x) != 128*1024+1) ABORT("bad length");
+
+ count = 0;
+ if (CORD_iter5(x, 64*1024-1, test_fn, CORD_NO_FN, (void *)13) == 0) {
+ ABORT("CORD_iter5 failed");
+ }
+ if (count != 64*1024 + 2) ABORT("CORD_iter5 failed");
+
+ count = 0;
+ CORD_set_pos(p, x, 64*1024-1);
+ while(CORD_pos_valid(p)) {
+ (void) test_fn(CORD_pos_fetch(p), (void *)13);
+ CORD_next(p);
+ }
+ if (count != 64*1024 + 2) ABORT("Position based iteration failed");
+
+ y = CORD_substr(x, 1023, 5);
+ if (!CORD_IS_STRING(y)) ABORT("short cord should usually be a string");
+ if (strcmp(y, "babab") != 0) ABORT("bad CORD_substr result");
+
+ y = CORD_substr(x, 1024, 8);
+ if (!CORD_IS_STRING(y)) ABORT("short cord should usually be a string");
+ if (strcmp(y, "abababab") != 0) ABORT("bad CORD_substr result");
+
+ y = CORD_substr(x, 128*1024-1, 8);
+ if (!CORD_IS_STRING(y)) ABORT("short cord should usually be a string");
+ if (strcmp(y, "bc") != 0) ABORT("bad CORD_substr result");
+
+ x = CORD_balance(x);
+ if (CORD_len(x) != 128*1024+1) ABORT("bad length");
+
+ count = 0;
+ if (CORD_iter5(x, 64*1024-1, test_fn, CORD_NO_FN, (void *)13) == 0) {
+ ABORT("CORD_iter5 failed");
+ }
+ if (count != 64*1024 + 2) ABORT("CORD_iter5 failed");
+
+ y = CORD_substr(x, 1023, 5);
+ if (!CORD_IS_STRING(y)) ABORT("short cord should usually be a string");
+ if (strcmp(y, "babab") != 0) ABORT("bad CORD_substr result");
+ y = CORD_from_fn(id_cord_fn, 0, 13);
+ i = 0;
+ CORD_set_pos(p, y, i);
+ while(CORD_pos_valid(p)) {
+ c = CORD_pos_fetch(p);
+ if(c != i) ABORT("Traversal of function node failed");
+ CORD_next(p); i++;
+ }
+ if (i != 13) ABORT("Bad apparent length for function node");
+}
+
+void test_extras()
+{
+# if defined(__OS2__)
+# define FNAME1 "tmp1"
+# define FNAME2 "tmp2"
+# elif defined(AMIGA)
+# define FNAME1 "T:tmp1"
+# define FNAME2 "T:tmp2"
+# else
+# define FNAME1 "/tmp/cord_test"
+# define FNAME2 "/tmp/cord_test2"
+# endif
+ register int i;
+ CORD y = "abcdefghijklmnopqrstuvwxyz0123456789";
+ CORD x = "{}";
+ CORD w, z;
+ FILE *f;
+ FILE *f1a, *f1b, *f2;
+
+ w = CORD_cat(CORD_cat(y,y),y);
+ z = CORD_catn(3,y,y,y);
+ if (CORD_cmp(w,z) != 0) ABORT("CORD_catn comparison wrong");
+ for (i = 1; i < 100; i++) {
+ x = CORD_cat(x, y);
+ }
+ z = CORD_balance(x);
+ if (CORD_cmp(x,z) != 0) ABORT("balanced string comparison wrong");
+ if (CORD_cmp(x,CORD_cat(z, CORD_nul(13))) >= 0) ABORT("comparison 2");
+ if (CORD_cmp(CORD_cat(x, CORD_nul(13)), z) <= 0) ABORT("comparison 3");
+ if (CORD_cmp(x,CORD_cat(z, "13")) >= 0) ABORT("comparison 4");
+ if ((f = fopen(FNAME1, "w")) == 0) ABORT("open failed");
+ if (CORD_put(z,f) == EOF) ABORT("CORD_put failed");
+ if (fclose(f) == EOF) ABORT("fclose failed");
+ w = CORD_from_file(f1a = fopen(FNAME1, "rb"));
+ if (CORD_len(w) != CORD_len(z)) ABORT("file length wrong");
+ if (CORD_cmp(w,z) != 0) ABORT("file comparison wrong");
+ if (CORD_cmp(CORD_substr(w, 50*36+2, 36), y) != 0)
+ ABORT("file substr wrong");
+ z = CORD_from_file_lazy(f1b = fopen(FNAME1, "rb"));
+ if (CORD_cmp(w,z) != 0) ABORT("File conversions differ");
+ if (CORD_chr(w, 0, '9') != 37) ABORT("CORD_chr failed 1");
+ if (CORD_chr(w, 3, 'a') != 38) ABORT("CORD_chr failed 2");
+ if (CORD_rchr(w, CORD_len(w) - 1, '}') != 1) ABORT("CORD_rchr failed");
+ x = y;
+ for (i = 1; i < 14; i++) {
+ x = CORD_cat(x,x);
+ }
+ if ((f = fopen(FNAME2, "w")) == 0) ABORT("2nd open failed");
+ if (CORD_put(x,f) == EOF) ABORT("CORD_put failed");
+ if (fclose(f) == EOF) ABORT("fclose failed");
+ w = CORD_from_file(f2 = fopen(FNAME2, "rb"));
+ if (CORD_len(w) != CORD_len(x)) ABORT("file length wrong");
+ if (CORD_cmp(w,x) != 0) ABORT("file comparison wrong");
+ if (CORD_cmp(CORD_substr(w, 1000*36, 36), y) != 0)
+ ABORT("file substr wrong");
+ if (strcmp(CORD_to_char_star(CORD_substr(w, 1000*36, 36)), y) != 0)
+ ABORT("char * file substr wrong");
+ if (strcmp(CORD_substr(w, 1000*36, 2), "ab") != 0)
+ ABORT("short file substr wrong");
+ if (CORD_str(x,1,"9a") != 35) ABORT("CORD_str failed 1");
+ if (CORD_str(x,0,"9abcdefghijk") != 35) ABORT("CORD_str failed 2");
+ if (CORD_str(x,0,"9abcdefghijx") != CORD_NOT_FOUND)
+ ABORT("CORD_str failed 3");
+ if (CORD_str(x,0,"9>") != CORD_NOT_FOUND) ABORT("CORD_str failed 4");
+ if (remove(FNAME1) != 0) {
+ /* On some systems, e.g. OS2, this may fail if f1 is still open. */
+ if ((fclose(f1a) == EOF) & (fclose(f1b) == EOF))
+ ABORT("fclose(f1) failed");
+ if (remove(FNAME1) != 0) ABORT("remove 1 failed");
+ }
+ if (remove(FNAME2) != 0) {
+ if (fclose(f2) == EOF) ABORT("fclose(f2) failed");
+ if (remove(FNAME2) != 0) ABORT("remove 2 failed");
+ }
+}
+
+void test_printf()
+{
+ CORD result;
+ char result2[200];
+ long l;
+ short s;
+ CORD x;
+
+ if (CORD_sprintf(&result, "%7.2f%ln", 3.14159F, &l) != 7)
+ ABORT("CORD_sprintf failed 1");
+ if (CORD_cmp(result, " 3.14") != 0)ABORT("CORD_sprintf goofed 1");
+ if (l != 7) ABORT("CORD_sprintf goofed 2");
+ if (CORD_sprintf(&result, "%-7.2s%hn%c%s", "abcd", &s, 'x', "yz") != 10)
+ ABORT("CORD_sprintf failed 2");
+ if (CORD_cmp(result, "ab xyz") != 0)ABORT("CORD_sprintf goofed 3");
+ if (s != 7) ABORT("CORD_sprintf goofed 4");
+ x = "abcdefghij";
+ x = CORD_cat(x,x);
+ x = CORD_cat(x,x);
+ x = CORD_cat(x,x);
+ if (CORD_sprintf(&result, "->%-120.78r!\n", x) != 124)
+ ABORT("CORD_sprintf failed 3");
+ (void) sprintf(result2, "->%-120.78s!\n", CORD_to_char_star(x));
+ if (CORD_cmp(result, result2) != 0)ABORT("CORD_sprintf goofed 5");
+}
+
+main()
+{
+# ifdef THINK_C
+ printf("cordtest:\n");
+# endif
+ test_basics();
+ test_extras();
+ test_printf();
+ CORD_fprintf(stderr, "SUCCEEDED\n");
+ return(0);
+}
diff --git a/gc/cord/cordxtra.c b/gc/cord/cordxtra.c
new file mode 100644
index 0000000..a5be10d
--- /dev/null
+++ b/gc/cord/cordxtra.c
@@ -0,0 +1,621 @@
+/*
+ * Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ * Author: Hans-J. Boehm (boehm@parc.xerox.com)
+ */
+/*
+ * These are functions on cords that do not need to understand their
+ * implementation. They serve also serve as example client code for
+ * cord_basics.
+ */
+/* Boehm, December 8, 1995 1:53 pm PST */
+# include <stdio.h>
+# include <string.h>
+# include <stdlib.h>
+# include <stdarg.h>
+# include "cord.h"
+# include "ec.h"
+# define I_HIDE_POINTERS /* So we get access to allocation lock. */
+ /* We use this for lazy file reading, */
+ /* so that we remain independent */
+ /* of the threads primitives. */
+# include "gc.h"
+
+/* For now we assume that pointer reads and writes are atomic, */
+/* i.e. another thread always sees the state before or after */
+/* a write. This might be false on a Motorola M68K with */
+/* pointers that are not 32-bit aligned. But there probably */
+/* aren't too many threads packages running on those. */
+# define ATOMIC_WRITE(x,y) (x) = (y)
+# define ATOMIC_READ(x) (*(x))
+
+/* The standard says these are in stdio.h, but they aren't always: */
+# ifndef SEEK_SET
+# define SEEK_SET 0
+# endif
+# ifndef SEEK_END
+# define SEEK_END 2
+# endif
+
+# define BUFSZ 2048 /* Size of stack allocated buffers when */
+ /* we want large buffers. */
+
+typedef void (* oom_fn)(void);
+
+# define OUT_OF_MEMORY { if (CORD_oom_fn != (oom_fn) 0) (*CORD_oom_fn)(); \
+ ABORT("Out of memory\n"); }
+# define ABORT(msg) { fprintf(stderr, "%s\n", msg); abort(); }
+
+CORD CORD_cat_char(CORD x, char c)
+{
+ register char * string;
+
+ if (c == '\0') return(CORD_cat(x, CORD_nul(1)));
+ string = GC_MALLOC_ATOMIC(2);
+ if (string == 0) OUT_OF_MEMORY;
+ string[0] = c;
+ string[1] = '\0';
+ return(CORD_cat_char_star(x, string, 1));
+}
+
+CORD CORD_catn(int nargs, ...)
+{
+ register CORD result = CORD_EMPTY;
+ va_list args;
+ register int i;
+
+ va_start(args, nargs);
+ for (i = 0; i < nargs; i++) {
+ register CORD next = va_arg(args, CORD);
+ result = CORD_cat(result, next);
+ }
+ va_end(args);
+ return(result);
+}
+
+typedef struct {
+ size_t len;
+ size_t count;
+ char * buf;
+} CORD_fill_data;
+
+int CORD_fill_proc(char c, void * client_data)
+{
+ register CORD_fill_data * d = (CORD_fill_data *)client_data;
+ register size_t count = d -> count;
+
+ (d -> buf)[count] = c;
+ d -> count = ++count;
+ if (count >= d -> len) {
+ return(1);
+ } else {
+ return(0);
+ }
+}
+
+int CORD_batched_fill_proc(const char * s, void * client_data)
+{
+ register CORD_fill_data * d = (CORD_fill_data *)client_data;
+ register size_t count = d -> count;
+ register size_t max = d -> len;
+ register char * buf = d -> buf;
+ register const char * t = s;
+
+ while((buf[count] = *t++) != '\0') {
+ count++;
+ if (count >= max) {
+ d -> count = count;
+ return(1);
+ }
+ }
+ d -> count = count;
+ return(0);
+}
+
+/* Fill buf with len characters starting at i. */
+/* Assumes len characters are available. */
+void CORD_fill_buf(CORD x, size_t i, size_t len, char * buf)
+{
+ CORD_fill_data fd;
+
+ fd.len = len;
+ fd.buf = buf;
+ fd.count = 0;
+ (void)CORD_iter5(x, i, CORD_fill_proc, CORD_batched_fill_proc, &fd);
+}
+
+int CORD_cmp(CORD x, CORD y)
+{
+ CORD_pos xpos;
+ CORD_pos ypos;
+ register size_t avail, yavail;
+
+ if (y == CORD_EMPTY) return(x != CORD_EMPTY);
+ if (x == CORD_EMPTY) return(-1);
+ if (CORD_IS_STRING(y) && CORD_IS_STRING(x)) return(strcmp(x,y));
+ CORD_set_pos(xpos, x, 0);
+ CORD_set_pos(ypos, y, 0);
+ for(;;) {
+ if (!CORD_pos_valid(xpos)) {
+ if (CORD_pos_valid(ypos)) {
+ return(-1);
+ } else {
+ return(0);
+ }
+ }
+ if (!CORD_pos_valid(ypos)) {
+ return(1);
+ }
+ if ((avail = CORD_pos_chars_left(xpos)) <= 0
+ || (yavail = CORD_pos_chars_left(ypos)) <= 0) {
+ register char xcurrent = CORD_pos_fetch(xpos);
+ register char ycurrent = CORD_pos_fetch(ypos);
+ if (xcurrent != ycurrent) return(xcurrent - ycurrent);
+ CORD_next(xpos);
+ CORD_next(ypos);
+ } else {
+ /* process as many characters as we can */
+ register int result;
+
+ if (avail > yavail) avail = yavail;
+ result = strncmp(CORD_pos_cur_char_addr(xpos),
+ CORD_pos_cur_char_addr(ypos), avail);
+ if (result != 0) return(result);
+ CORD_pos_advance(xpos, avail);
+ CORD_pos_advance(ypos, avail);
+ }
+ }
+}
+
+int CORD_ncmp(CORD x, size_t x_start, CORD y, size_t y_start, size_t len)
+{
+ CORD_pos xpos;
+ CORD_pos ypos;
+ register size_t count;
+ register long avail, yavail;
+
+ CORD_set_pos(xpos, x, x_start);
+ CORD_set_pos(ypos, y, y_start);
+ for(count = 0; count < len;) {
+ if (!CORD_pos_valid(xpos)) {
+ if (CORD_pos_valid(ypos)) {
+ return(-1);
+ } else {
+ return(0);
+ }
+ }
+ if (!CORD_pos_valid(ypos)) {
+ return(1);
+ }
+ if ((avail = CORD_pos_chars_left(xpos)) <= 0
+ || (yavail = CORD_pos_chars_left(ypos)) <= 0) {
+ register char xcurrent = CORD_pos_fetch(xpos);
+ register char ycurrent = CORD_pos_fetch(ypos);
+ if (xcurrent != ycurrent) return(xcurrent - ycurrent);
+ CORD_next(xpos);
+ CORD_next(ypos);
+ count++;
+ } else {
+ /* process as many characters as we can */
+ register int result;
+
+ if (avail > yavail) avail = yavail;
+ count += avail;
+ if (count > len) avail -= (count - len);
+ result = strncmp(CORD_pos_cur_char_addr(xpos),
+ CORD_pos_cur_char_addr(ypos), (size_t)avail);
+ if (result != 0) return(result);
+ CORD_pos_advance(xpos, (size_t)avail);
+ CORD_pos_advance(ypos, (size_t)avail);
+ }
+ }
+ return(0);
+}
+
+char * CORD_to_char_star(CORD x)
+{
+ register size_t len = CORD_len(x);
+ char * result = GC_MALLOC_ATOMIC(len + 1);
+
+ if (result == 0) OUT_OF_MEMORY;
+ CORD_fill_buf(x, 0, len, result);
+ result[len] = '\0';
+ return(result);
+}
+
+CORD CORD_from_char_star(const char *s)
+{
+ char * result;
+ size_t len = strlen(s);
+
+ if (0 == len) return(CORD_EMPTY);
+ result = GC_MALLOC_ATOMIC(len + 1);
+ if (result == 0) OUT_OF_MEMORY;
+ memcpy(result, s, len+1);
+ return(result);
+}
+
+const char * CORD_to_const_char_star(CORD x)
+{
+ if (x == 0) return("");
+ if (CORD_IS_STRING(x)) return((const char *)x);
+ return(CORD_to_char_star(x));
+}
+
+char CORD_fetch(CORD x, size_t i)
+{
+ CORD_pos xpos;
+
+ CORD_set_pos(xpos, x, i);
+ if (!CORD_pos_valid(xpos)) ABORT("bad index?");
+ return(CORD_pos_fetch(xpos));
+}
+
+
+int CORD_put_proc(char c, void * client_data)
+{
+ register FILE * f = (FILE *)client_data;
+
+ return(putc(c, f) == EOF);
+}
+
+int CORD_batched_put_proc(const char * s, void * client_data)
+{
+ register FILE * f = (FILE *)client_data;
+
+ return(fputs(s, f) == EOF);
+}
+
+
+int CORD_put(CORD x, FILE * f)
+{
+ if (CORD_iter5(x, 0, CORD_put_proc, CORD_batched_put_proc, f)) {
+ return(EOF);
+ } else {
+ return(1);
+ }
+}
+
+typedef struct {
+ size_t pos; /* Current position in the cord */
+ char target; /* Character we're looking for */
+} chr_data;
+
+int CORD_chr_proc(char c, void * client_data)
+{
+ register chr_data * d = (chr_data *)client_data;
+
+ if (c == d -> target) return(1);
+ (d -> pos) ++;
+ return(0);
+}
+
+int CORD_rchr_proc(char c, void * client_data)
+{
+ register chr_data * d = (chr_data *)client_data;
+
+ if (c == d -> target) return(1);
+ (d -> pos) --;
+ return(0);
+}
+
+int CORD_batched_chr_proc(const char *s, void * client_data)
+{
+ register chr_data * d = (chr_data *)client_data;
+ register char * occ = strchr(s, d -> target);
+
+ if (occ == 0) {
+ d -> pos += strlen(s);
+ return(0);
+ } else {
+ d -> pos += occ - s;
+ return(1);
+ }
+}
+
+size_t CORD_chr(CORD x, size_t i, int c)
+{
+ chr_data d;
+
+ d.pos = i;
+ d.target = c;
+ if (CORD_iter5(x, i, CORD_chr_proc, CORD_batched_chr_proc, &d)) {
+ return(d.pos);
+ } else {
+ return(CORD_NOT_FOUND);
+ }
+}
+
+size_t CORD_rchr(CORD x, size_t i, int c)
+{
+ chr_data d;
+
+ d.pos = i;
+ d.target = c;
+ if (CORD_riter4(x, i, CORD_rchr_proc, &d)) {
+ return(d.pos);
+ } else {
+ return(CORD_NOT_FOUND);
+ }
+}
+
+/* Find the first occurrence of s in x at position start or later. */
+/* This uses an asymptotically poor algorithm, which should typically */
+/* perform acceptably. We compare the first few characters directly, */
+/* and call CORD_ncmp whenever there is a partial match. */
+/* This has the advantage that we allocate very little, or not at all. */
+/* It's very fast if there are few close misses. */
+size_t CORD_str(CORD x, size_t start, CORD s)
+{
+ CORD_pos xpos;
+ size_t xlen = CORD_len(x);
+ size_t slen;
+ register size_t start_len;
+ const char * s_start;
+ unsigned long s_buf = 0; /* The first few characters of s */
+ unsigned long x_buf = 0; /* Start of candidate substring. */
+ /* Initialized only to make compilers */
+ /* happy. */
+ unsigned long mask = 0;
+ register size_t i;
+ register size_t match_pos;
+
+ if (s == CORD_EMPTY) return(start);
+ if (CORD_IS_STRING(s)) {
+ s_start = s;
+ slen = strlen(s);
+ } else {
+ s_start = CORD_to_char_star(CORD_substr(s, 0, sizeof(unsigned long)));
+ slen = CORD_len(s);
+ }
+ if (xlen < start || xlen - start < slen) return(CORD_NOT_FOUND);
+ start_len = slen;
+ if (start_len > sizeof(unsigned long)) start_len = sizeof(unsigned long);
+ CORD_set_pos(xpos, x, start);
+ for (i = 0; i < start_len; i++) {
+ mask <<= 8;
+ mask |= 0xff;
+ s_buf <<= 8;
+ s_buf |= s_start[i];
+ x_buf <<= 8;
+ x_buf |= CORD_pos_fetch(xpos);
+ CORD_next(xpos);
+ }
+ for (match_pos = start; ; match_pos++) {
+ if ((x_buf & mask) == s_buf) {
+ if (slen == start_len ||
+ CORD_ncmp(x, match_pos + start_len,
+ s, start_len, slen - start_len) == 0) {
+ return(match_pos);
+ }
+ }
+ if ( match_pos == xlen - slen ) {
+ return(CORD_NOT_FOUND);
+ }
+ x_buf <<= 8;
+ x_buf |= CORD_pos_fetch(xpos);
+ CORD_next(xpos);
+ }
+}
+
+void CORD_ec_flush_buf(CORD_ec x)
+{
+ register size_t len = x[0].ec_bufptr - x[0].ec_buf;
+ char * s;
+
+ if (len == 0) return;
+ s = GC_MALLOC_ATOMIC(len+1);
+ memcpy(s, x[0].ec_buf, len);
+ s[len] = '\0';
+ x[0].ec_cord = CORD_cat_char_star(x[0].ec_cord, s, len);
+ x[0].ec_bufptr = x[0].ec_buf;
+}
+
+void CORD_ec_append_cord(CORD_ec x, CORD s)
+{
+ CORD_ec_flush_buf(x);
+ x[0].ec_cord = CORD_cat(x[0].ec_cord, s);
+}
+
+/*ARGSUSED*/
+char CORD_nul_func(size_t i, void * client_data)
+{
+ return((char)(unsigned long)client_data);
+}
+
+
+CORD CORD_chars(char c, size_t i)
+{
+ return(CORD_from_fn(CORD_nul_func, (void *)(unsigned long)c, i));
+}
+
+CORD CORD_from_file_eager(FILE * f)
+{
+ register int c;
+ CORD_ec ecord;
+
+ CORD_ec_init(ecord);
+ for(;;) {
+ c = getc(f);
+ if (c == 0) {
+ /* Append the right number of NULs */
+ /* Note that any string of NULs is rpresented in 4 words, */
+ /* independent of its length. */
+ register size_t count = 1;
+
+ CORD_ec_flush_buf(ecord);
+ while ((c = getc(f)) == 0) count++;
+ ecord[0].ec_cord = CORD_cat(ecord[0].ec_cord, CORD_nul(count));
+ }
+ if (c == EOF) break;
+ CORD_ec_append(ecord, c);
+ }
+ (void) fclose(f);
+ return(CORD_balance(CORD_ec_to_cord(ecord)));
+}
+
+/* The state maintained for a lazily read file consists primarily */
+/* of a large direct-mapped cache of previously read values. */
+/* We could rely more on stdio buffering. That would have 2 */
+/* disadvantages: */
+/* 1) Empirically, not all fseek implementations preserve the */
+/* buffer whenever they could. */
+/* 2) It would fail if 2 different sections of a long cord */
+/* were being read alternately. */
+/* We do use the stdio buffer for read ahead. */
+/* To guarantee thread safety in the presence of atomic pointer */
+/* writes, cache lines are always replaced, and never modified in */
+/* place. */
+
+# define LOG_CACHE_SZ 14
+# define CACHE_SZ (1 << LOG_CACHE_SZ)
+# define LOG_LINE_SZ 9
+# define LINE_SZ (1 << LOG_LINE_SZ)
+
+typedef struct {
+ size_t tag;
+ char data[LINE_SZ];
+ /* data[i%LINE_SZ] = ith char in file if tag = i/LINE_SZ */
+} cache_line;
+
+typedef struct {
+ FILE * lf_file;
+ size_t lf_current; /* Current file pointer value */
+ cache_line * volatile lf_cache[CACHE_SZ/LINE_SZ];
+} lf_state;
+
+# define MOD_CACHE_SZ(n) ((n) & (CACHE_SZ - 1))
+# define DIV_CACHE_SZ(n) ((n) >> LOG_CACHE_SZ)
+# define MOD_LINE_SZ(n) ((n) & (LINE_SZ - 1))
+# define DIV_LINE_SZ(n) ((n) >> LOG_LINE_SZ)
+# define LINE_START(n) ((n) & ~(LINE_SZ - 1))
+
+typedef struct {
+ lf_state * state;
+ size_t file_pos; /* Position of needed character. */
+ cache_line * new_cache;
+} refill_data;
+
+/* Executed with allocation lock. */
+static char refill_cache(client_data)
+refill_data * client_data;
+{
+ register lf_state * state = client_data -> state;
+ register size_t file_pos = client_data -> file_pos;
+ FILE *f = state -> lf_file;
+ size_t line_start = LINE_START(file_pos);
+ size_t line_no = DIV_LINE_SZ(MOD_CACHE_SZ(file_pos));
+ cache_line * new_cache = client_data -> new_cache;
+
+ if (line_start != state -> lf_current
+ && fseek(f, line_start, SEEK_SET) != 0) {
+ ABORT("fseek failed");
+ }
+ if (fread(new_cache -> data, sizeof(char), LINE_SZ, f)
+ <= file_pos - line_start) {
+ ABORT("fread failed");
+ }
+ new_cache -> tag = DIV_LINE_SZ(file_pos);
+ /* Store barrier goes here. */
+ ATOMIC_WRITE(state -> lf_cache[line_no], new_cache);
+ state -> lf_current = line_start + LINE_SZ;
+ return(new_cache->data[MOD_LINE_SZ(file_pos)]);
+}
+
+char CORD_lf_func(size_t i, void * client_data)
+{
+ register lf_state * state = (lf_state *)client_data;
+ register cache_line * volatile * cl_addr =
+ &(state -> lf_cache[DIV_LINE_SZ(MOD_CACHE_SZ(i))]);
+ register cache_line * cl = (cache_line *)ATOMIC_READ(cl_addr);
+
+ if (cl == 0 || cl -> tag != DIV_LINE_SZ(i)) {
+ /* Cache miss */
+ refill_data rd;
+
+ rd.state = state;
+ rd.file_pos = i;
+ rd.new_cache = GC_NEW_ATOMIC(cache_line);
+ if (rd.new_cache == 0) OUT_OF_MEMORY;
+ return((char)(GC_word)
+ GC_call_with_alloc_lock((GC_fn_type) refill_cache, &rd));
+ }
+ return(cl -> data[MOD_LINE_SZ(i)]);
+}
+
+/*ARGSUSED*/
+void CORD_lf_close_proc(void * obj, void * client_data)
+{
+ if (fclose(((lf_state *)obj) -> lf_file) != 0) {
+ ABORT("CORD_lf_close_proc: fclose failed");
+ }
+}
+
+CORD CORD_from_file_lazy_inner(FILE * f, size_t len)
+{
+ register lf_state * state = GC_NEW(lf_state);
+ register int i;
+
+ if (state == 0) OUT_OF_MEMORY;
+ if (len != 0) {
+ /* Dummy read to force buffer allocation. */
+ /* This greatly increases the probability */
+ /* of avoiding deadlock if buffer allocation */
+ /* is redirected to GC_malloc and the */
+ /* world is multithreaded. */
+ char buf[1];
+
+ (void) fread(buf, 1, 1, f);
+ rewind(f);
+ }
+ state -> lf_file = f;
+ for (i = 0; i < CACHE_SZ/LINE_SZ; i++) {
+ state -> lf_cache[i] = 0;
+ }
+ state -> lf_current = 0;
+ GC_REGISTER_FINALIZER(state, CORD_lf_close_proc, 0, 0, 0);
+ return(CORD_from_fn(CORD_lf_func, state, len));
+}
+
+CORD CORD_from_file_lazy(FILE * f)
+{
+ register long len;
+
+ if (fseek(f, 0l, SEEK_END) != 0) {
+ ABORT("Bad fd argument - fseek failed");
+ }
+ if ((len = ftell(f)) < 0) {
+ ABORT("Bad fd argument - ftell failed");
+ }
+ rewind(f);
+ return(CORD_from_file_lazy_inner(f, (size_t)len));
+}
+
+# define LAZY_THRESHOLD (128*1024 + 1)
+
+CORD CORD_from_file(FILE * f)
+{
+ register long len;
+
+ if (fseek(f, 0l, SEEK_END) != 0) {
+ ABORT("Bad fd argument - fseek failed");
+ }
+ if ((len = ftell(f)) < 0) {
+ ABORT("Bad fd argument - ftell failed");
+ }
+ rewind(f);
+ if (len < LAZY_THRESHOLD) {
+ return(CORD_from_file_eager(f));
+ } else {
+ return(CORD_from_file_lazy_inner(f, (size_t)len));
+ }
+}
diff --git a/gc/cord/de.c b/gc/cord/de.c
new file mode 100644
index 0000000..fda7142
--- /dev/null
+++ b/gc/cord/de.c
@@ -0,0 +1,603 @@
+/*
+ * Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ * Author: Hans-J. Boehm (boehm@parc.xerox.com)
+ */
+/*
+ * A really simple-minded text editor based on cords.
+ * Things it does right:
+ * No size bounds.
+ * Inbounded undo.
+ * Shouldn't crash no matter what file you invoke it on (e.g. /vmunix)
+ * (Make sure /vmunix is not writable before you try this.)
+ * Scrolls horizontally.
+ * Things it does wrong:
+ * It doesn't handle tabs reasonably (use "expand" first).
+ * The command set is MUCH too small.
+ * The redisplay algorithm doesn't let curses do the scrolling.
+ * The rule for moving the window over the file is suboptimal.
+ */
+/* Boehm, February 6, 1995 12:27 pm PST */
+
+/* Boehm, May 19, 1994 2:20 pm PDT */
+#include <stdio.h>
+#include "gc.h"
+#include "cord.h"
+
+#ifdef THINK_C
+#define MACINTOSH
+#include <ctype.h>
+#endif
+
+#if defined(__BORLANDC__) && !defined(WIN32)
+ /* If this is DOS or win16, we'll fail anyway. */
+ /* Might as well assume win32. */
+# define WIN32
+#endif
+
+#if defined(WIN32)
+# include <windows.h>
+# include "de_win.h"
+#elif defined(MACINTOSH)
+# include <console.h>
+/* curses emulation. */
+# define initscr()
+# define endwin()
+# define nonl()
+# define noecho() csetmode(C_NOECHO, stdout)
+# define cbreak() csetmode(C_CBREAK, stdout)
+# define refresh()
+# define addch(c) putchar(c)
+# define standout() cinverse(1, stdout)
+# define standend() cinverse(0, stdout)
+# define move(line,col) cgotoxy(col + 1, line + 1, stdout)
+# define clrtoeol() ccleol(stdout)
+# define de_error(s) { fprintf(stderr, s); getchar(); }
+# define LINES 25
+# define COLS 80
+#else
+# include <curses.h>
+# define de_error(s) { fprintf(stderr, s); sleep(2); }
+#endif
+#include "de_cmds.h"
+
+/* List of line number to position mappings, in descending order. */
+/* There may be holes. */
+typedef struct LineMapRep {
+ int line;
+ size_t pos;
+ struct LineMapRep * previous;
+} * line_map;
+
+/* List of file versions, one per edit operation */
+typedef struct HistoryRep {
+ CORD file_contents;
+ struct HistoryRep * previous;
+ line_map map; /* Invalid for first record "now" */
+} * history;
+
+history now = 0;
+CORD current; /* == now -> file_contents. */
+size_t current_len; /* Current file length. */
+line_map current_map = 0; /* Current line no. to pos. map */
+size_t current_map_size = 0; /* Number of current_map entries. */
+ /* Not always accurate, but reset */
+ /* by prune_map. */
+# define MAX_MAP_SIZE 3000
+
+/* Current display position */
+int dis_line = 0;
+int dis_col = 0;
+
+# define ALL -1
+# define NONE - 2
+int need_redisplay = 0; /* Line that needs to be redisplayed. */
+
+
+/* Current cursor position. Always within file. */
+int line = 0;
+int col = 0;
+size_t file_pos = 0; /* Character position corresponding to cursor. */
+
+/* Invalidate line map for lines > i */
+void invalidate_map(int i)
+{
+ while(current_map -> line > i) {
+ current_map = current_map -> previous;
+ current_map_size--;
+ }
+}
+
+/* Reduce the number of map entries to save space for huge files. */
+/* This also affects maps in histories. */
+void prune_map()
+{
+ line_map map = current_map;
+ int start_line = map -> line;
+
+ current_map_size = 0;
+ for(; map != 0; map = map -> previous) {
+ current_map_size++;
+ if (map -> line < start_line - LINES && map -> previous != 0) {
+ map -> previous = map -> previous -> previous;
+ }
+ }
+}
+/* Add mapping entry */
+void add_map(int line, size_t pos)
+{
+ line_map new_map = GC_NEW(struct LineMapRep);
+
+ if (current_map_size >= MAX_MAP_SIZE) prune_map();
+ new_map -> line = line;
+ new_map -> pos = pos;
+ new_map -> previous = current_map;
+ current_map = new_map;
+ current_map_size++;
+}
+
+
+
+/* Return position of column *c of ith line in */
+/* current file. Adjust *c to be within the line.*/
+/* A 0 pointer is taken as 0 column. */
+/* Returns CORD_NOT_FOUND if i is too big. */
+/* Assumes i > dis_line. */
+size_t line_pos(int i, int *c)
+{
+ int j;
+ size_t cur;
+ size_t next;
+ line_map map = current_map;
+
+ while (map -> line > i) map = map -> previous;
+ if (map -> line < i - 2) /* rebuild */ invalidate_map(i);
+ for (j = map -> line, cur = map -> pos; j < i;) {
+ cur = CORD_chr(current, cur, '\n');
+ if (cur == current_len-1) return(CORD_NOT_FOUND);
+ cur++;
+ if (++j > current_map -> line) add_map(j, cur);
+ }
+ if (c != 0) {
+ next = CORD_chr(current, cur, '\n');
+ if (next == CORD_NOT_FOUND) next = current_len - 1;
+ if (next < cur + *c) {
+ *c = next - cur;
+ }
+ cur += *c;
+ }
+ return(cur);
+}
+
+void add_hist(CORD s)
+{
+ history new_file = GC_NEW(struct HistoryRep);
+
+ new_file -> file_contents = current = s;
+ current_len = CORD_len(s);
+ new_file -> previous = now;
+ if (now != 0) now -> map = current_map;
+ now = new_file;
+}
+
+void del_hist(void)
+{
+ now = now -> previous;
+ current = now -> file_contents;
+ current_map = now -> map;
+ current_len = CORD_len(current);
+}
+
+/* Current screen_contents; a dynamically allocated array of CORDs */
+CORD * screen = 0;
+int screen_size = 0;
+
+# ifndef WIN32
+/* Replace a line in the curses stdscr. All control characters are */
+/* displayed as upper case characters in standout mode. This isn't */
+/* terribly appropriate for tabs. */
+void replace_line(int i, CORD s)
+{
+ register int c;
+ CORD_pos p;
+ size_t len = CORD_len(s);
+
+ if (screen == 0 || LINES > screen_size) {
+ screen_size = LINES;
+ screen = (CORD *)GC_MALLOC(screen_size * sizeof(CORD));
+ }
+# if !defined(MACINTOSH)
+ /* A gross workaround for an apparent curses bug: */
+ if (i == LINES-1 && len == COLS) {
+ s = CORD_substr(s, 0, CORD_len(s) - 1);
+ }
+# endif
+ if (CORD_cmp(screen[i], s) != 0) {
+ move(i, 0); clrtoeol(); move(i,0);
+
+ CORD_FOR (p, s) {
+ c = CORD_pos_fetch(p) & 0x7f;
+ if (iscntrl(c)) {
+ standout(); addch(c + 0x40); standend();
+ } else {
+ addch(c);
+ }
+ }
+ screen[i] = s;
+ }
+}
+#else
+# define replace_line(i,s) invalidate_line(i)
+#endif
+
+/* Return up to COLS characters of the line of s starting at pos, */
+/* returning only characters after the given column. */
+CORD retrieve_line(CORD s, size_t pos, unsigned column)
+{
+ CORD candidate = CORD_substr(s, pos, column + COLS);
+ /* avoids scanning very long lines */
+ int eol = CORD_chr(candidate, 0, '\n');
+ int len;
+
+ if (eol == CORD_NOT_FOUND) eol = CORD_len(candidate);
+ len = (int)eol - (int)column;
+ if (len < 0) len = 0;
+ return(CORD_substr(s, pos + column, len));
+}
+
+# ifdef WIN32
+# define refresh();
+
+ CORD retrieve_screen_line(int i)
+ {
+ register size_t pos;
+
+ invalidate_map(dis_line + LINES); /* Prune search */
+ pos = line_pos(dis_line + i, 0);
+ if (pos == CORD_NOT_FOUND) return(CORD_EMPTY);
+ return(retrieve_line(current, pos, dis_col));
+ }
+# endif
+
+/* Display the visible section of the current file */
+void redisplay(void)
+{
+ register int i;
+
+ invalidate_map(dis_line + LINES); /* Prune search */
+ for (i = 0; i < LINES; i++) {
+ if (need_redisplay == ALL || need_redisplay == i) {
+ register size_t pos = line_pos(dis_line + i, 0);
+
+ if (pos == CORD_NOT_FOUND) break;
+ replace_line(i, retrieve_line(current, pos, dis_col));
+ if (need_redisplay == i) goto done;
+ }
+ }
+ for (; i < LINES; i++) replace_line(i, CORD_EMPTY);
+done:
+ refresh();
+ need_redisplay = NONE;
+}
+
+int dis_granularity;
+
+/* Update dis_line, dis_col, and dis_pos to make cursor visible. */
+/* Assumes line, col, dis_line, dis_pos are in bounds. */
+void normalize_display()
+{
+ int old_line = dis_line;
+ int old_col = dis_col;
+
+ dis_granularity = 1;
+ if (LINES > 15 && COLS > 15) dis_granularity = 2;
+ while (dis_line > line) dis_line -= dis_granularity;
+ while (dis_col > col) dis_col -= dis_granularity;
+ while (line >= dis_line + LINES) dis_line += dis_granularity;
+ while (col >= dis_col + COLS) dis_col += dis_granularity;
+ if (old_line != dis_line || old_col != dis_col) {
+ need_redisplay = ALL;
+ }
+}
+
+# if defined(WIN32)
+# elif defined(MACINTOSH)
+# define move_cursor(x,y) cgotoxy(x + 1, y + 1, stdout)
+# else
+# define move_cursor(x,y) move(y,x)
+# endif
+
+/* Adjust display so that cursor is visible; move cursor into position */
+/* Update screen if necessary. */
+void fix_cursor(void)
+{
+ normalize_display();
+ if (need_redisplay != NONE) redisplay();
+ move_cursor(col - dis_col, line - dis_line);
+ refresh();
+# ifndef WIN32
+ fflush(stdout);
+# endif
+}
+
+/* Make sure line, col, and dis_pos are somewhere inside file. */
+/* Recompute file_pos. Assumes dis_pos is accurate or past eof */
+void fix_pos()
+{
+ int my_col = col;
+
+ if ((size_t)line > current_len) line = current_len;
+ file_pos = line_pos(line, &my_col);
+ if (file_pos == CORD_NOT_FOUND) {
+ for (line = current_map -> line, file_pos = current_map -> pos;
+ file_pos < current_len;
+ line++, file_pos = CORD_chr(current, file_pos, '\n') + 1);
+ line--;
+ file_pos = line_pos(line, &col);
+ } else {
+ col = my_col;
+ }
+}
+
+#if defined(WIN32)
+# define beep() Beep(1000 /* Hz */, 300 /* msecs */)
+#elif defined(MACINTOSH)
+# define beep() SysBeep(1)
+#else
+/*
+ * beep() is part of some curses packages and not others.
+ * We try to match the type of the builtin one, if any.
+ */
+#ifdef __STDC__
+ int beep(void)
+#else
+ int beep()
+#endif
+{
+ putc('\007', stderr);
+ return(0);
+}
+#endif
+
+# define NO_PREFIX -1
+# define BARE_PREFIX -2
+int repeat_count = NO_PREFIX; /* Current command prefix. */
+
+int locate_mode = 0; /* Currently between 2 ^Ls */
+CORD locate_string = CORD_EMPTY; /* Current search string. */
+
+char * arg_file_name;
+
+#ifdef WIN32
+/* Change the current position to whatever is currently displayed at */
+/* the given SCREEN coordinates. */
+void set_position(int c, int l)
+{
+ line = l + dis_line;
+ col = c + dis_col;
+ fix_pos();
+ move_cursor(col - dis_col, line - dis_line);
+}
+#endif /* WIN32 */
+
+/* Perform the command associated with character c. C may be an */
+/* integer > 256 denoting a windows command, one of the above control */
+/* characters, or another ASCII character to be used as either a */
+/* character to be inserted, a repeat count, or a search string, */
+/* depending on the current state. */
+void do_command(int c)
+{
+ int i;
+ int need_fix_pos;
+ FILE * out;
+
+ if ( c == '\r') c = '\n';
+ if (locate_mode) {
+ size_t new_pos;
+
+ if (c == LOCATE) {
+ locate_mode = 0;
+ locate_string = CORD_EMPTY;
+ return;
+ }
+ locate_string = CORD_cat_char(locate_string, (char)c);
+ new_pos = CORD_str(current, file_pos - CORD_len(locate_string) + 1,
+ locate_string);
+ if (new_pos != CORD_NOT_FOUND) {
+ need_redisplay = ALL;
+ new_pos += CORD_len(locate_string);
+ for (;;) {
+ file_pos = line_pos(line + 1, 0);
+ if (file_pos > new_pos) break;
+ line++;
+ }
+ col = new_pos - line_pos(line, 0);
+ file_pos = new_pos;
+ fix_cursor();
+ } else {
+ locate_string = CORD_substr(locate_string, 0,
+ CORD_len(locate_string) - 1);
+ beep();
+ }
+ return;
+ }
+ if (c == REPEAT) {
+ repeat_count = BARE_PREFIX; return;
+ } else if (c < 0x100 && isdigit(c)){
+ if (repeat_count == BARE_PREFIX) {
+ repeat_count = c - '0'; return;
+ } else if (repeat_count != NO_PREFIX) {
+ repeat_count = 10 * repeat_count + c - '0'; return;
+ }
+ }
+ if (repeat_count == NO_PREFIX) repeat_count = 1;
+ if (repeat_count == BARE_PREFIX && (c == UP || c == DOWN)) {
+ repeat_count = LINES - dis_granularity;
+ }
+ if (repeat_count == BARE_PREFIX) repeat_count = 8;
+ need_fix_pos = 0;
+ for (i = 0; i < repeat_count; i++) {
+ switch(c) {
+ case LOCATE:
+ locate_mode = 1;
+ break;
+ case TOP:
+ line = col = file_pos = 0;
+ break;
+ case UP:
+ if (line != 0) {
+ line--;
+ need_fix_pos = 1;
+ }
+ break;
+ case DOWN:
+ line++;
+ need_fix_pos = 1;
+ break;
+ case LEFT:
+ if (col != 0) {
+ col--; file_pos--;
+ }
+ break;
+ case RIGHT:
+ if (CORD_fetch(current, file_pos) == '\n') break;
+ col++; file_pos++;
+ break;
+ case UNDO:
+ del_hist();
+ need_redisplay = ALL; need_fix_pos = 1;
+ break;
+ case BS:
+ if (col == 0) {
+ beep();
+ break;
+ }
+ col--; file_pos--;
+ /* fall through: */
+ case DEL:
+ if (file_pos == current_len-1) break;
+ /* Can't delete trailing newline */
+ if (CORD_fetch(current, file_pos) == '\n') {
+ need_redisplay = ALL; need_fix_pos = 1;
+ } else {
+ need_redisplay = line - dis_line;
+ }
+ add_hist(CORD_cat(
+ CORD_substr(current, 0, file_pos),
+ CORD_substr(current, file_pos+1, current_len)));
+ invalidate_map(line);
+ break;
+ case WRITE:
+ {
+ CORD name = CORD_cat(CORD_from_char_star(arg_file_name),
+ ".new");
+
+ if ((out = fopen(CORD_to_const_char_star(name), "wb")) == NULL
+ || CORD_put(current, out) == EOF) {
+ de_error("Write failed\n");
+ need_redisplay = ALL;
+ } else {
+ fclose(out);
+ }
+ }
+ break;
+ default:
+ {
+ CORD left_part = CORD_substr(current, 0, file_pos);
+ CORD right_part = CORD_substr(current, file_pos, current_len);
+
+ add_hist(CORD_cat(CORD_cat_char(left_part, (char)c),
+ right_part));
+ invalidate_map(line);
+ if (c == '\n') {
+ col = 0; line++; file_pos++;
+ need_redisplay = ALL;
+ } else {
+ col++; file_pos++;
+ need_redisplay = line - dis_line;
+ }
+ break;
+ }
+ }
+ }
+ if (need_fix_pos) fix_pos();
+ fix_cursor();
+ repeat_count = NO_PREFIX;
+}
+
+/* OS independent initialization */
+
+void generic_init(void)
+{
+ FILE * f;
+ CORD initial;
+
+ if ((f = fopen(arg_file_name, "rb")) == NULL) {
+ initial = "\n";
+ } else {
+ initial = CORD_from_file(f);
+ if (initial == CORD_EMPTY
+ || CORD_fetch(initial, CORD_len(initial)-1) != '\n') {
+ initial = CORD_cat(initial, "\n");
+ }
+ }
+ add_map(0,0);
+ add_hist(initial);
+ now -> map = current_map;
+ now -> previous = now; /* Can't back up further: beginning of the world */
+ need_redisplay = ALL;
+ fix_cursor();
+}
+
+#ifndef WIN32
+
+main(argc, argv)
+int argc;
+char ** argv;
+{
+ int c;
+
+#if defined(MACINTOSH)
+ console_options.title = "\pDumb Editor";
+ cshow(stdout);
+ GC_init();
+ argc = ccommand(&argv);
+#endif
+
+ if (argc != 2) goto usage;
+ arg_file_name = argv[1];
+ setvbuf(stdout, GC_MALLOC_ATOMIC(8192), _IOFBF, 8192);
+ initscr();
+ noecho(); nonl(); cbreak();
+ generic_init();
+ while ((c = getchar()) != QUIT) {
+ if (c == EOF) break;
+ do_command(c);
+ }
+done:
+ move(LINES-1, 0);
+ clrtoeol();
+ refresh();
+ nl();
+ echo();
+ endwin();
+ exit(0);
+usage:
+ fprintf(stderr, "Usage: %s file\n", argv[0]);
+ fprintf(stderr, "Cursor keys: ^B(left) ^F(right) ^P(up) ^N(down)\n");
+ fprintf(stderr, "Undo: ^U Write to <file>.new: ^W");
+ fprintf(stderr, "Quit:^D Repeat count: ^R[n]\n");
+ fprintf(stderr, "Top: ^T Locate (search, find): ^L text ^L\n");
+ exit(1);
+}
+
+#endif /* !WIN32 */
diff --git a/gc/cord/de_cmds.h b/gc/cord/de_cmds.h
new file mode 100644
index 0000000..f42ddcf
--- /dev/null
+++ b/gc/cord/de_cmds.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+/* Boehm, May 19, 1994 2:24 pm PDT */
+
+#ifndef DE_CMDS_H
+
+# define DE_CMDS_H
+
+# define UP 16 /* ^P */
+# define DOWN 14 /* ^N */
+# define LEFT 2 /* ^B */
+# define RIGHT 6 /* ^F */
+# define DEL 127 /* ^? */
+# define BS 8 /* ^H */
+# define UNDO 21 /* ^U */
+# define WRITE 23 /* ^W */
+# define QUIT 4 /* ^D */
+# define REPEAT 18 /* ^R */
+# define LOCATE 12 /* ^L */
+# define TOP 20 /* ^T */
+
+#endif
+
diff --git a/gc/cord/de_win.ICO b/gc/cord/de_win.ICO
new file mode 100755
index 0000000..b20ac3e
--- /dev/null
+++ b/gc/cord/de_win.ICO
Binary files differ
diff --git a/gc/cord/de_win.RC b/gc/cord/de_win.RC
new file mode 100644
index 0000000..554a300
--- /dev/null
+++ b/gc/cord/de_win.RC
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to copy this garbage collector for any purpose,
+ * provided the above notices are retained on all copies.
+ */
+/* Boehm, May 13, 1994 9:50 am PDT */
+
+#include "windows.h"
+#include "de_cmds.h"
+#include "de_win.h"
+
+
+
+ABOUTBOX DIALOG 19, 21, 163, 47
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "About Demonstration Text Editor"
+BEGIN
+ ICON "DE", -1, 8, 8, 13, 13, WS_CHILD | WS_VISIBLE
+ LTEXT "Demonstration Text Editor", -1, 44, 8, 118, 8, WS_CHILD | WS_VISIBLE | WS_GROUP
+ LTEXT "Version 4.1", -1, 44, 16, 60, 8, WS_CHILD | WS_VISIBLE | WS_GROUP
+ PUSHBUTTON "OK", IDOK, 118, 27, 24, 14, WS_CHILD | WS_VISIBLE | WS_TABSTOP
+END
+
+
+DE MENU
+BEGIN
+ POPUP "&File"
+ BEGIN
+ MENUITEM "&Save\t^W", IDM_FILESAVE
+ MENUITEM "E&xit\t^D", IDM_FILEEXIT
+ END
+
+ POPUP "&Edit"
+ BEGIN
+ MENUITEM "Page &Down\t^R^N", IDM_EDITPDOWN
+ MENUITEM "Page &Up\t^R^P", IDM_EDITPUP
+ MENUITEM "U&ndo\t^U", IDM_EDITUNDO
+ MENUITEM "&Locate\t^L ... ^L", IDM_EDITLOCATE
+ MENUITEM "D&own\t^N", IDM_EDITDOWN
+ MENUITEM "U&p\t^P", IDM_EDITUP
+ MENUITEM "Le&ft\t^B", IDM_EDITLEFT
+ MENUITEM "&Right\t^F", IDM_EDITRIGHT
+ MENUITEM "Delete &Backward\tBS", IDM_EDITBS
+ MENUITEM "Delete F&orward\tDEL", IDM_EDITDEL
+ MENUITEM "&Top\t^T", IDM_EDITTOP
+ END
+
+ POPUP "&Help"
+ BEGIN
+ MENUITEM "&Contents", IDM_HELPCONTENTS
+ MENUITEM "&About...", IDM_HELPABOUT
+ END
+
+ MENUITEM "Page_&Down", IDM_EDITPDOWN
+ MENUITEM "Page_&Up", IDM_EDITPUP
+END
+
+
+DE ACCELERATORS
+BEGIN
+ "^R", IDM_EDITREPEAT
+ "^N", IDM_EDITDOWN
+ "^P", IDM_EDITUP
+ "^L", IDM_EDITLOCATE
+ "^B", IDM_EDITLEFT
+ "^F", IDM_EDITRIGHT
+ "^T", IDM_EDITTOP
+ VK_DELETE, IDM_EDITDEL, VIRTKEY
+ VK_BACK, IDM_EDITBS, VIRTKEY
+END
+
+
+DE ICON cord\de_win.ICO
+
diff --git a/gc/cord/de_win.c b/gc/cord/de_win.c
new file mode 100644
index 0000000..fedbfbe
--- /dev/null
+++ b/gc/cord/de_win.c
@@ -0,0 +1,366 @@
+/*
+ * Copyright (c) 1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+/* Boehm, February 6, 1995 12:29 pm PST */
+
+/*
+ * The MS Windows specific part of de.
+ * This started as the generic Windows application template
+ * made available by Rob Haack (rhaack@polaris.unm.edu), but
+ * significant parts didn't survive to the final version.
+ *
+ * This was written by a nonexpert windows programmer.
+ */
+
+
+#include "windows.h"
+#include "gc.h"
+#include "cord.h"
+#include "de_cmds.h"
+#include "de_win.h"
+
+int LINES = 0;
+int COLS = 0;
+
+char szAppName[] = "DE";
+char FullAppName[] = "Demonstration Editor";
+
+HWND hwnd;
+
+void de_error(char *s)
+{
+ MessageBox( hwnd, (LPSTR) s,
+ (LPSTR) FullAppName,
+ MB_ICONINFORMATION | MB_OK );
+ InvalidateRect(hwnd, NULL, TRUE);
+}
+
+int APIENTRY WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
+ LPSTR command_line, int nCmdShow)
+{
+ MSG msg;
+ WNDCLASS wndclass;
+ HANDLE hAccel;
+
+ if (!hPrevInstance)
+ {
+ wndclass.style = CS_HREDRAW | CS_VREDRAW;
+ wndclass.lpfnWndProc = WndProc;
+ wndclass.cbClsExtra = 0;
+ wndclass.cbWndExtra = DLGWINDOWEXTRA;
+ wndclass.hInstance = hInstance;
+ wndclass.hIcon = LoadIcon (hInstance, szAppName);
+ wndclass.hCursor = LoadCursor (NULL, IDC_ARROW);
+ wndclass.hbrBackground = GetStockObject(WHITE_BRUSH);
+ wndclass.lpszMenuName = "DE";
+ wndclass.lpszClassName = szAppName;
+
+ if (RegisterClass (&wndclass) == 0) {
+ char buf[50];
+
+ sprintf(buf, "RegisterClass: error code: 0x%X", GetLastError());
+ de_error(buf);
+ return(0);
+ }
+ }
+
+ /* Empirically, the command line does not include the command name ...
+ if (command_line != 0) {
+ while (isspace(*command_line)) command_line++;
+ while (*command_line != 0 && !isspace(*command_line)) command_line++;
+ while (isspace(*command_line)) command_line++;
+ } */
+
+ if (command_line == 0 || *command_line == 0) {
+ de_error("File name argument required");
+ return( 0 );
+ } else {
+ char *p = command_line;
+
+ while (*p != 0 && !isspace(*p)) p++;
+ arg_file_name = CORD_to_char_star(
+ CORD_substr(command_line, 0, p - command_line));
+ }
+
+ hwnd = CreateWindow (szAppName,
+ FullAppName,
+ WS_OVERLAPPEDWINDOW | WS_CAPTION, /* Window style */
+ CW_USEDEFAULT, 0, /* default pos. */
+ CW_USEDEFAULT, 0, /* default width, height */
+ NULL, /* No parent */
+ NULL, /* Window class menu */
+ hInstance, NULL);
+ if (hwnd == NULL) {
+ char buf[50];
+
+ sprintf(buf, "CreateWindow: error code: 0x%X", GetLastError());
+ de_error(buf);
+ return(0);
+ }
+
+ ShowWindow (hwnd, nCmdShow);
+
+ hAccel = LoadAccelerators( hInstance, szAppName );
+
+ while (GetMessage (&msg, NULL, 0, 0))
+ {
+ if( !TranslateAccelerator( hwnd, hAccel, &msg ) )
+ {
+ TranslateMessage (&msg);
+ DispatchMessage (&msg);
+ }
+ }
+ return msg.wParam;
+}
+
+/* Return the argument with all control characters replaced by blanks. */
+char * plain_chars(char * text, size_t len)
+{
+ char * result = GC_MALLOC_ATOMIC(len + 1);
+ register size_t i;
+
+ for (i = 0; i < len; i++) {
+ if (iscntrl(text[i])) {
+ result[i] = ' ';
+ } else {
+ result[i] = text[i];
+ }
+ }
+ result[len] = '\0';
+ return(result);
+}
+
+/* Return the argument with all non-control-characters replaced by */
+/* blank, and all control characters c replaced by c + 32. */
+char * control_chars(char * text, size_t len)
+{
+ char * result = GC_MALLOC_ATOMIC(len + 1);
+ register size_t i;
+
+ for (i = 0; i < len; i++) {
+ if (iscntrl(text[i])) {
+ result[i] = text[i] + 0x40;
+ } else {
+ result[i] = ' ';
+ }
+ }
+ result[len] = '\0';
+ return(result);
+}
+
+int char_width;
+int char_height;
+
+void get_line_rect(int line, int win_width, RECT * rectp)
+{
+ rectp -> top = line * char_height;
+ rectp -> bottom = rectp->top + char_height;
+ rectp -> left = 0;
+ rectp -> right = win_width;
+}
+
+int caret_visible = 0; /* Caret is currently visible. */
+
+int screen_was_painted = 0;/* Screen has been painted at least once. */
+
+void update_cursor(void);
+
+LRESULT CALLBACK WndProc (HWND hwnd, UINT message,
+ WPARAM wParam, LPARAM lParam)
+{
+ static FARPROC lpfnAboutBox;
+ static HANDLE hInstance;
+ HDC dc;
+ PAINTSTRUCT ps;
+ RECT client_area;
+ RECT this_line;
+ RECT dummy;
+ TEXTMETRIC tm;
+ register int i;
+ int id;
+
+ switch (message)
+ {
+ case WM_CREATE:
+ hInstance = ( (LPCREATESTRUCT) lParam)->hInstance;
+ lpfnAboutBox = MakeProcInstance( (FARPROC) AboutBox, hInstance );
+ dc = GetDC(hwnd);
+ SelectObject(dc, GetStockObject(SYSTEM_FIXED_FONT));
+ GetTextMetrics(dc, &tm);
+ ReleaseDC(hwnd, dc);
+ char_width = tm.tmAveCharWidth;
+ char_height = tm.tmHeight + tm.tmExternalLeading;
+ GetClientRect(hwnd, &client_area);
+ COLS = (client_area.right - client_area.left)/char_width;
+ LINES = (client_area.bottom - client_area.top)/char_height;
+ generic_init();
+ return(0);
+
+ case WM_CHAR:
+ if (wParam == QUIT) {
+ SendMessage( hwnd, WM_CLOSE, 0, 0L );
+ } else {
+ do_command(wParam);
+ }
+ return(0);
+
+ case WM_SETFOCUS:
+ CreateCaret(hwnd, NULL, char_width, char_height);
+ ShowCaret(hwnd);
+ caret_visible = 1;
+ update_cursor();
+ return(0);
+
+ case WM_KILLFOCUS:
+ HideCaret(hwnd);
+ DestroyCaret();
+ caret_visible = 0;
+ return(0);
+
+ case WM_LBUTTONUP:
+ {
+ unsigned xpos = LOWORD(lParam); /* From left */
+ unsigned ypos = HIWORD(lParam); /* from top */
+
+ set_position( xpos/char_width, ypos/char_height );
+ return(0);
+ }
+
+ case WM_COMMAND:
+ id = LOWORD(wParam);
+ if (id & EDIT_CMD_FLAG) {
+ if (id & REPEAT_FLAG) do_command(REPEAT);
+ do_command(CHAR_CMD(id));
+ return( 0 );
+ } else {
+ switch(id) {
+ case IDM_FILEEXIT:
+ SendMessage( hwnd, WM_CLOSE, 0, 0L );
+ return( 0 );
+
+ case IDM_HELPABOUT:
+ if( DialogBox( hInstance, "ABOUTBOX",
+ hwnd, lpfnAboutBox ) );
+ InvalidateRect( hwnd, NULL, TRUE );
+ return( 0 );
+ case IDM_HELPCONTENTS:
+ de_error(
+ "Cursor keys: ^B(left) ^F(right) ^P(up) ^N(down)\n"
+ "Undo: ^U Write: ^W Quit:^D Repeat count: ^R[n]\n"
+ "Top: ^T Locate (search, find): ^L text ^L\n");
+ return( 0 );
+ }
+ }
+ break;
+
+ case WM_CLOSE:
+ DestroyWindow( hwnd );
+ return 0;
+
+ case WM_DESTROY:
+ PostQuitMessage (0);
+ GC_win32_free_heap();
+ return 0;
+
+ case WM_PAINT:
+ dc = BeginPaint(hwnd, &ps);
+ GetClientRect(hwnd, &client_area);
+ COLS = (client_area.right - client_area.left)/char_width;
+ LINES = (client_area.bottom - client_area.top)/char_height;
+ SelectObject(dc, GetStockObject(SYSTEM_FIXED_FONT));
+ for (i = 0; i < LINES; i++) {
+ get_line_rect(i, client_area.right, &this_line);
+ if (IntersectRect(&dummy, &this_line, &ps.rcPaint)) {
+ CORD raw_line = retrieve_screen_line(i);
+ size_t len = CORD_len(raw_line);
+ char * text = CORD_to_char_star(raw_line);
+ /* May contain embedded NULLs */
+ char * plain = plain_chars(text, len);
+ char * blanks = CORD_to_char_star(CORD_chars(' ',
+ COLS - len));
+ char * control = control_chars(text, len);
+# define RED RGB(255,0,0)
+
+ SetBkMode(dc, OPAQUE);
+ SetTextColor(dc, GetSysColor(COLOR_WINDOWTEXT));
+
+ TextOut(dc, this_line.left, this_line.top,
+ plain, len);
+ TextOut(dc, this_line.left + len * char_width, this_line.top,
+ blanks, COLS - len);
+ SetBkMode(dc, TRANSPARENT);
+ SetTextColor(dc, RED);
+ TextOut(dc, this_line.left, this_line.top,
+ control, strlen(control));
+ }
+ }
+ EndPaint(hwnd, &ps);
+ screen_was_painted = 1;
+ return 0;
+ }
+ return DefWindowProc (hwnd, message, wParam, lParam);
+}
+
+int last_col;
+int last_line;
+
+void move_cursor(int c, int l)
+{
+ last_col = c;
+ last_line = l;
+
+ if (caret_visible) update_cursor();
+}
+
+void update_cursor(void)
+{
+ SetCaretPos(last_col * char_width, last_line * char_height);
+ ShowCaret(hwnd);
+}
+
+void invalidate_line(int i)
+{
+ RECT line;
+
+ if (!screen_was_painted) return;
+ /* Invalidating a rectangle before painting seems result in a */
+ /* major performance problem. */
+ get_line_rect(i, COLS*char_width, &line);
+ InvalidateRect(hwnd, &line, FALSE);
+}
+
+LRESULT CALLBACK AboutBox( HWND hDlg, UINT message,
+ WPARAM wParam, LPARAM lParam )
+{
+ switch( message )
+ {
+ case WM_INITDIALOG:
+ SetFocus( GetDlgItem( hDlg, IDOK ) );
+ break;
+
+ case WM_COMMAND:
+ switch( wParam )
+ {
+ case IDOK:
+ EndDialog( hDlg, TRUE );
+ break;
+ }
+ break;
+
+ case WM_CLOSE:
+ EndDialog( hDlg, TRUE );
+ return TRUE;
+
+ }
+ return FALSE;
+}
+
diff --git a/gc/cord/de_win.h b/gc/cord/de_win.h
new file mode 100644
index 0000000..57a47b4
--- /dev/null
+++ b/gc/cord/de_win.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+/* Boehm, May 19, 1994 2:25 pm PDT */
+
+/* cord.h, de_cmds.h, and windows.h should be included before this. */
+
+
+# define OTHER_FLAG 0x100
+# define EDIT_CMD_FLAG 0x200
+# define REPEAT_FLAG 0x400
+
+# define CHAR_CMD(i) ((i) & 0xff)
+
+/* MENU: DE */
+#define IDM_FILESAVE (EDIT_CMD_FLAG + WRITE)
+#define IDM_FILEEXIT (OTHER_FLAG + 1)
+#define IDM_HELPABOUT (OTHER_FLAG + 2)
+#define IDM_HELPCONTENTS (OTHER_FLAG + 3)
+
+#define IDM_EDITPDOWN (REPEAT_FLAG + EDIT_CMD_FLAG + DOWN)
+#define IDM_EDITPUP (REPEAT_FLAG + EDIT_CMD_FLAG + UP)
+#define IDM_EDITUNDO (EDIT_CMD_FLAG + UNDO)
+#define IDM_EDITLOCATE (EDIT_CMD_FLAG + LOCATE)
+#define IDM_EDITDOWN (EDIT_CMD_FLAG + DOWN)
+#define IDM_EDITUP (EDIT_CMD_FLAG + UP)
+#define IDM_EDITLEFT (EDIT_CMD_FLAG + LEFT)
+#define IDM_EDITRIGHT (EDIT_CMD_FLAG + RIGHT)
+#define IDM_EDITBS (EDIT_CMD_FLAG + BS)
+#define IDM_EDITDEL (EDIT_CMD_FLAG + DEL)
+#define IDM_EDITREPEAT (EDIT_CMD_FLAG + REPEAT)
+#define IDM_EDITTOP (EDIT_CMD_FLAG + TOP)
+
+
+
+
+/* Windows UI stuff */
+
+LRESULT CALLBACK WndProc (HWND hwnd, UINT message,
+ UINT wParam, LONG lParam);
+
+LRESULT CALLBACK AboutBox( HWND hDlg, UINT message,
+ UINT wParam, LONG lParam );
+
+
+/* Screen dimensions. Maintained by de_win.c. */
+extern int LINES;
+extern int COLS;
+
+/* File being edited. */
+extern char * arg_file_name;
+
+/* Current display position in file. Maintained by de.c */
+extern int dis_line;
+extern int dis_col;
+
+/* Current cursor position in file. */
+extern int line;
+extern int col;
+
+/*
+ * Calls from de_win.c to de.c
+ */
+
+CORD retrieve_screen_line(int i);
+ /* Get the contents of i'th screen line. */
+ /* Relies on COLS. */
+
+void set_position(int x, int y);
+ /* Set column, row. Upper left of window = (0,0). */
+
+void do_command(int);
+ /* Execute an editor command. */
+ /* Agument is a command character or one */
+ /* of the IDM_ commands. */
+
+void generic_init(void);
+ /* OS independent initialization */
+
+
+/*
+ * Calls from de.c to de_win.c
+ */
+
+void move_cursor(int column, int line);
+ /* Physically move the cursor on the display, */
+ /* so that it appears at */
+ /* (column, line). */
+
+void invalidate_line(int line);
+ /* Invalidate line i on the screen. */
+
+void de_error(char *s);
+ /* Display error message. */ \ No newline at end of file
diff --git a/gc/cord/ec.h b/gc/cord/ec.h
new file mode 100644
index 0000000..c829b83
--- /dev/null
+++ b/gc/cord/ec.h
@@ -0,0 +1,70 @@
+# ifndef EC_H
+# define EC_H
+
+# ifndef CORD_H
+# include "cord.h"
+# endif
+
+/* Extensible cords are strings that may be destructively appended to. */
+/* They allow fast construction of cords from characters that are */
+/* being read from a stream. */
+/*
+ * A client might look like:
+ *
+ * {
+ * CORD_ec x;
+ * CORD result;
+ * char c;
+ * FILE *f;
+ *
+ * ...
+ * CORD_ec_init(x);
+ * while(...) {
+ * c = getc(f);
+ * ...
+ * CORD_ec_append(x, c);
+ * }
+ * result = CORD_balance(CORD_ec_to_cord(x));
+ *
+ * If a C string is desired as the final result, the call to CORD_balance
+ * may be replaced by a call to CORD_to_char_star.
+ */
+
+# ifndef CORD_BUFSZ
+# define CORD_BUFSZ 128
+# endif
+
+typedef struct CORD_ec_struct {
+ CORD ec_cord;
+ char * ec_bufptr;
+ char ec_buf[CORD_BUFSZ+1];
+} CORD_ec[1];
+
+/* This structure represents the concatenation of ec_cord with */
+/* ec_buf[0 ... (ec_bufptr-ec_buf-1)] */
+
+/* Flush the buffer part of the extended chord into ec_cord. */
+/* Note that this is almost the only real function, and it is */
+/* implemented in 6 lines in cordxtra.c */
+void CORD_ec_flush_buf(CORD_ec x);
+
+/* Convert an extensible cord to a cord. */
+# define CORD_ec_to_cord(x) (CORD_ec_flush_buf(x), (x)[0].ec_cord)
+
+/* Initialize an extensible cord. */
+# define CORD_ec_init(x) ((x)[0].ec_cord = 0, (x)[0].ec_bufptr = (x)[0].ec_buf)
+
+/* Append a character to an extensible cord. */
+# define CORD_ec_append(x, c) \
+ { \
+ if ((x)[0].ec_bufptr == (x)[0].ec_buf + CORD_BUFSZ) { \
+ CORD_ec_flush_buf(x); \
+ } \
+ *((x)[0].ec_bufptr)++ = (c); \
+ }
+
+/* Append a cord to an extensible cord. Structure remains shared with */
+/* original. */
+void CORD_ec_append_cord(CORD_ec x, CORD s);
+
+# endif /* EC_H */
diff --git a/gc/cord/gc.h b/gc/cord/gc.h
new file mode 100644
index 0000000..3061409
--- /dev/null
+++ b/gc/cord/gc.h
@@ -0,0 +1,754 @@
+/*
+ * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
+ * Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved.
+ * Copyright 1996 by Silicon Graphics. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+
+/*
+ * Note that this defines a large number of tuning hooks, which can
+ * safely be ignored in nearly all cases. For normal use it suffices
+ * to call only GC_MALLOC and perhaps GC_REALLOC.
+ * For better performance, also look at GC_MALLOC_ATOMIC, and
+ * GC_enable_incremental. If you need an action to be performed
+ * immediately before an object is collected, look at GC_register_finalizer.
+ * If you are using Solaris threads, look at the end of this file.
+ * Everything else is best ignored unless you encounter performance
+ * problems.
+ */
+
+#ifndef _GC_H
+
+# define _GC_H
+# define __GC
+# include <stddef.h>
+
+#if defined(__CYGWIN32__) && defined(GC_USE_DLL)
+#include "libgc_globals.h"
+#endif
+
+#if defined(_MSC_VER) && defined(_DLL)
+# ifdef GC_BUILD
+# define GC_API __declspec(dllexport)
+# else
+# define GC_API __declspec(dllimport)
+# endif
+#endif
+
+#if defined(__WATCOMC__) && defined(GC_DLL)
+# ifdef GC_BUILD
+# define GC_API extern __declspec(dllexport)
+# else
+# define GC_API extern __declspec(dllimport)
+# endif
+#endif
+
+#ifndef GC_API
+#define GC_API extern
+#endif
+
+# if defined(__STDC__) || defined(__cplusplus)
+# define GC_PROTO(args) args
+ typedef void * GC_PTR;
+# else
+# define GC_PROTO(args) ()
+ typedef char * GC_PTR;
+# endif
+
+# ifdef __cplusplus
+ extern "C" {
+# endif
+
+
+/* Define word and signed_word to be unsigned and signed types of the */
+/* size as char * or void *. There seems to be no way to do this */
+/* even semi-portably. The following is probably no better/worse */
+/* than almost anything else. */
+/* The ANSI standard suggests that size_t and ptr_diff_t might be */
+/* better choices. But those appear to have incorrect definitions */
+/* on may systems. Notably "typedef int size_t" seems to be both */
+/* frequent and WRONG. */
+typedef unsigned long GC_word;
+typedef long GC_signed_word;
+
+/* Public read-only variables */
+
+GC_API GC_word GC_gc_no;/* Counter incremented per collection. */
+ /* Includes empty GCs at startup. */
+
+
+/* Public R/W variables */
+
+GC_API GC_PTR (*GC_oom_fn) GC_PROTO((size_t bytes_requested));
+ /* When there is insufficient memory to satisfy */
+ /* an allocation request, we return */
+ /* (*GC_oom_fn)(). By default this just */
+ /* returns 0. */
+ /* If it returns, it must return 0 or a valid */
+ /* pointer to a previously allocated heap */
+ /* object. */
+
+GC_API int GC_find_leak;
+ /* Do not actually garbage collect, but simply */
+ /* report inaccessible memory that was not */
+ /* deallocated with GC_free. Initial value */
+ /* is determined by FIND_LEAK macro. */
+
+GC_API int GC_quiet; /* Disable statistics output. Only matters if */
+ /* collector has been compiled with statistics */
+ /* enabled. This involves a performance cost, */
+ /* and is thus not the default. */
+
+GC_API int GC_finalize_on_demand;
+ /* If nonzero, finalizers will only be run in */
+ /* response to an eplit GC_invoke_finalizers */
+ /* call. The default is determined by whether */
+ /* the FINALIZE_ON_DEMAND macro is defined */
+ /* when the collector is built. */
+
+GC_API int GC_java_finalization;
+ /* Mark objects reachable from finalizable */
+ /* objects in a separate postpass. This makes */
+ /* it a bit safer to use non-topologically- */
+ /* ordered finalization. Default value is */
+ /* determined by JAVA_FINALIZATION macro. */
+
+GC_API int GC_dont_gc; /* Dont collect unless explicitly requested, e.g. */
+ /* because it's not safe. */
+
+GC_API int GC_dont_expand;
+ /* Dont expand heap unless explicitly requested */
+ /* or forced to. */
+
+GC_API int GC_full_freq; /* Number of partial collections between */
+ /* full collections. Matters only if */
+ /* GC_incremental is set. */
+
+GC_API GC_word GC_non_gc_bytes;
+ /* Bytes not considered candidates for collection. */
+ /* Used only to control scheduling of collections. */
+
+GC_API GC_word GC_free_space_divisor;
+ /* We try to make sure that we allocate at */
+ /* least N/GC_free_space_divisor bytes between */
+ /* collections, where N is the heap size plus */
+ /* a rough estimate of the root set size. */
+ /* Initially, GC_free_space_divisor = 4. */
+ /* Increasing its value will use less space */
+ /* but more collection time. Decreasing it */
+ /* will appreciably decrease collection time */
+ /* at the expense of space. */
+ /* GC_free_space_divisor = 1 will effectively */
+ /* disable collections. */
+
+GC_API GC_word GC_max_retries;
+ /* The maximum number of GCs attempted before */
+ /* reporting out of memory after heap */
+ /* expansion fails. Initially 0. */
+
+
+GC_API char *GC_stackbottom; /* Cool end of user stack. */
+ /* May be set in the client prior to */
+ /* calling any GC_ routines. This */
+ /* avoids some overhead, and */
+ /* potentially some signals that can */
+ /* confuse debuggers. Otherwise the */
+ /* collector attempts to set it */
+ /* automatically. */
+ /* For multithreaded code, this is the */
+ /* cold end of the stack for the */
+ /* primordial thread. */
+
+/* Public procedures */
+/*
+ * general purpose allocation routines, with roughly malloc calling conv.
+ * The atomic versions promise that no relevant pointers are contained
+ * in the object. The nonatomic versions guarantee that the new object
+ * is cleared. GC_malloc_stubborn promises that no changes to the object
+ * will occur after GC_end_stubborn_change has been called on the
+ * result of GC_malloc_stubborn. GC_malloc_uncollectable allocates an object
+ * that is scanned for pointers to collectable objects, but is not itself
+ * collectable. GC_malloc_uncollectable and GC_free called on the resulting
+ * object implicitly update GC_non_gc_bytes appropriately.
+ */
+GC_API GC_PTR GC_malloc GC_PROTO((size_t size_in_bytes));
+GC_API GC_PTR GC_malloc_atomic GC_PROTO((size_t size_in_bytes));
+GC_API GC_PTR GC_malloc_uncollectable GC_PROTO((size_t size_in_bytes));
+GC_API GC_PTR GC_malloc_stubborn GC_PROTO((size_t size_in_bytes));
+
+/* The following is only defined if the library has been suitably */
+/* compiled: */
+GC_API GC_PTR GC_malloc_atomic_uncollectable GC_PROTO((size_t size_in_bytes));
+
+/* Explicitly deallocate an object. Dangerous if used incorrectly. */
+/* Requires a pointer to the base of an object. */
+/* If the argument is stubborn, it should not be changeable when freed. */
+/* An object should not be enable for finalization when it is */
+/* explicitly deallocated. */
+/* GC_free(0) is a no-op, as required by ANSI C for free. */
+GC_API void GC_free GC_PROTO((GC_PTR object_addr));
+
+/*
+ * Stubborn objects may be changed only if the collector is explicitly informed.
+ * The collector is implicitly informed of coming change when such
+ * an object is first allocated. The following routines inform the
+ * collector that an object will no longer be changed, or that it will
+ * once again be changed. Only nonNIL pointer stores into the object
+ * are considered to be changes. The argument to GC_end_stubborn_change
+ * must be exacly the value returned by GC_malloc_stubborn or passed to
+ * GC_change_stubborn. (In the second case it may be an interior pointer
+ * within 512 bytes of the beginning of the objects.)
+ * There is a performance penalty for allowing more than
+ * one stubborn object to be changed at once, but it is acceptable to
+ * do so. The same applies to dropping stubborn objects that are still
+ * changeable.
+ */
+GC_API void GC_change_stubborn GC_PROTO((GC_PTR));
+GC_API void GC_end_stubborn_change GC_PROTO((GC_PTR));
+
+/* Return a pointer to the base (lowest address) of an object given */
+/* a pointer to a location within the object. */
+/* Return 0 if displaced_pointer doesn't point to within a valid */
+/* object. */
+GC_API GC_PTR GC_base GC_PROTO((GC_PTR displaced_pointer));
+
+/* Given a pointer to the base of an object, return its size in bytes. */
+/* The returned size may be slightly larger than what was originally */
+/* requested. */
+GC_API size_t GC_size GC_PROTO((GC_PTR object_addr));
+
+/* For compatibility with C library. This is occasionally faster than */
+/* a malloc followed by a bcopy. But if you rely on that, either here */
+/* or with the standard C library, your code is broken. In my */
+/* opinion, it shouldn't have been invented, but now we're stuck. -HB */
+/* The resulting object has the same kind as the original. */
+/* If the argument is stubborn, the result will have changes enabled. */
+/* It is an error to have changes enabled for the original object. */
+/* Follows ANSI comventions for NULL old_object. */
+GC_API GC_PTR GC_realloc
+ GC_PROTO((GC_PTR old_object, size_t new_size_in_bytes));
+
+/* Explicitly increase the heap size. */
+/* Returns 0 on failure, 1 on success. */
+GC_API int GC_expand_hp GC_PROTO((size_t number_of_bytes));
+
+/* Limit the heap size to n bytes. Useful when you're debugging, */
+/* especially on systems that don't handle running out of memory well. */
+/* n == 0 ==> unbounded. This is the default. */
+GC_API void GC_set_max_heap_size GC_PROTO((GC_word n));
+
+/* Inform the collector that a certain section of statically allocated */
+/* memory contains no pointers to garbage collected memory. Thus it */
+/* need not be scanned. This is sometimes important if the application */
+/* maps large read/write files into the address space, which could be */
+/* mistaken for dynamic library data segments on some systems. */
+GC_API void GC_exclude_static_roots GC_PROTO((GC_PTR start, GC_PTR finish));
+
+/* Clear the set of root segments. Wizards only. */
+GC_API void GC_clear_roots GC_PROTO((void));
+
+/* Add a root segment. Wizards only. */
+GC_API void GC_add_roots GC_PROTO((char * low_address,
+ char * high_address_plus_1));
+
+/* Add a displacement to the set of those considered valid by the */
+/* collector. GC_register_displacement(n) means that if p was returned */
+/* by GC_malloc, then (char *)p + n will be considered to be a valid */
+/* pointer to n. N must be small and less than the size of p. */
+/* (All pointers to the interior of objects from the stack are */
+/* considered valid in any case. This applies to heap objects and */
+/* static data.) */
+/* Preferably, this should be called before any other GC procedures. */
+/* Calling it later adds to the probability of excess memory */
+/* retention. */
+/* This is a no-op if the collector was compiled with recognition of */
+/* arbitrary interior pointers enabled, which is now the default. */
+GC_API void GC_register_displacement GC_PROTO((GC_word n));
+
+/* The following version should be used if any debugging allocation is */
+/* being done. */
+GC_API void GC_debug_register_displacement GC_PROTO((GC_word n));
+
+/* Explicitly trigger a full, world-stop collection. */
+GC_API void GC_gcollect GC_PROTO((void));
+
+/* Trigger a full world-stopped collection. Abort the collection if */
+/* and when stop_func returns a nonzero value. Stop_func will be */
+/* called frequently, and should be reasonably fast. This works even */
+/* if virtual dirty bits, and hence incremental collection is not */
+/* available for this architecture. Collections can be aborted faster */
+/* than normal pause times for incremental collection. However, */
+/* aborted collections do no useful work; the next collection needs */
+/* to start from the beginning. */
+/* Return 0 if the collection was aborted, 1 if it succeeded. */
+typedef int (* GC_stop_func) GC_PROTO((void));
+GC_API int GC_try_to_collect GC_PROTO((GC_stop_func stop_func));
+
+/* Return the number of bytes in the heap. Excludes collector private */
+/* data structures. Includes empty blocks and fragmentation loss. */
+/* Includes some pages that were allocated but never written. */
+GC_API size_t GC_get_heap_size GC_PROTO((void));
+
+/* Return the number of bytes allocated since the last collection. */
+GC_API size_t GC_get_bytes_since_gc GC_PROTO((void));
+
+/* Enable incremental/generational collection. */
+/* Not advisable unless dirty bits are */
+/* available or most heap objects are */
+/* pointerfree(atomic) or immutable. */
+/* Don't use in leak finding mode. */
+/* Ignored if GC_dont_gc is true. */
+GC_API void GC_enable_incremental GC_PROTO((void));
+
+/* Perform some garbage collection work, if appropriate. */
+/* Return 0 if there is no more work to be done. */
+/* Typically performs an amount of work corresponding roughly */
+/* to marking from one page. May do more work if further */
+/* progress requires it, e.g. if incremental collection is */
+/* disabled. It is reasonable to call this in a wait loop */
+/* until it returns 0. */
+GC_API int GC_collect_a_little GC_PROTO((void));
+
+/* Allocate an object of size lb bytes. The client guarantees that */
+/* as long as the object is live, it will be referenced by a pointer */
+/* that points to somewhere within the first 256 bytes of the object. */
+/* (This should normally be declared volatile to prevent the compiler */
+/* from invalidating this assertion.) This routine is only useful */
+/* if a large array is being allocated. It reduces the chance of */
+/* accidentally retaining such an array as a result of scanning an */
+/* integer that happens to be an address inside the array. (Actually, */
+/* it reduces the chance of the allocator not finding space for such */
+/* an array, since it will try hard to avoid introducing such a false */
+/* reference.) On a SunOS 4.X or MS Windows system this is recommended */
+/* for arrays likely to be larger than 100K or so. For other systems, */
+/* or if the collector is not configured to recognize all interior */
+/* pointers, the threshold is normally much higher. */
+GC_API GC_PTR GC_malloc_ignore_off_page GC_PROTO((size_t lb));
+GC_API GC_PTR GC_malloc_atomic_ignore_off_page GC_PROTO((size_t lb));
+
+#if defined(__sgi) && !defined(__GNUC__) && _COMPILER_VERSION >= 720
+# define GC_ADD_CALLER
+# define GC_RETURN_ADDR (GC_word)__return_address
+#endif
+
+#ifdef GC_ADD_CALLER
+# define GC_EXTRAS GC_RETURN_ADDR, __FILE__, __LINE__
+# define GC_EXTRA_PARAMS GC_word ra, char * descr_string, int descr_int
+#else
+# define GC_EXTRAS __FILE__, __LINE__
+# define GC_EXTRA_PARAMS char * descr_string, int descr_int
+#endif
+
+/* Debugging (annotated) allocation. GC_gcollect will check */
+/* objects allocated in this way for overwrites, etc. */
+GC_API GC_PTR GC_debug_malloc
+ GC_PROTO((size_t size_in_bytes, GC_EXTRA_PARAMS));
+GC_API GC_PTR GC_debug_malloc_atomic
+ GC_PROTO((size_t size_in_bytes, GC_EXTRA_PARAMS));
+GC_API GC_PTR GC_debug_malloc_uncollectable
+ GC_PROTO((size_t size_in_bytes, GC_EXTRA_PARAMS));
+GC_API GC_PTR GC_debug_malloc_stubborn
+ GC_PROTO((size_t size_in_bytes, GC_EXTRA_PARAMS));
+GC_API void GC_debug_free GC_PROTO((GC_PTR object_addr));
+GC_API GC_PTR GC_debug_realloc
+ GC_PROTO((GC_PTR old_object, size_t new_size_in_bytes,
+ GC_EXTRA_PARAMS));
+
+GC_API void GC_debug_change_stubborn GC_PROTO((GC_PTR));
+GC_API void GC_debug_end_stubborn_change GC_PROTO((GC_PTR));
+# ifdef GC_DEBUG
+# define GC_MALLOC(sz) GC_debug_malloc(sz, GC_EXTRAS)
+# define GC_MALLOC_ATOMIC(sz) GC_debug_malloc_atomic(sz, GC_EXTRAS)
+# define GC_MALLOC_UNCOLLECTABLE(sz) GC_debug_malloc_uncollectable(sz, \
+ GC_EXTRAS)
+# define GC_REALLOC(old, sz) GC_debug_realloc(old, sz, GC_EXTRAS)
+# define GC_FREE(p) GC_debug_free(p)
+# define GC_REGISTER_FINALIZER(p, f, d, of, od) \
+ GC_debug_register_finalizer(p, f, d, of, od)
+# define GC_REGISTER_FINALIZER_IGNORE_SELF(p, f, d, of, od) \
+ GC_debug_register_finalizer_ignore_self(p, f, d, of, od)
+# define GC_MALLOC_STUBBORN(sz) GC_debug_malloc_stubborn(sz, GC_EXTRAS);
+# define GC_CHANGE_STUBBORN(p) GC_debug_change_stubborn(p)
+# define GC_END_STUBBORN_CHANGE(p) GC_debug_end_stubborn_change(p)
+# define GC_GENERAL_REGISTER_DISAPPEARING_LINK(link, obj) \
+ GC_general_register_disappearing_link(link, GC_base(obj))
+# define GC_REGISTER_DISPLACEMENT(n) GC_debug_register_displacement(n)
+# else
+# define GC_MALLOC(sz) GC_malloc(sz)
+# define GC_MALLOC_ATOMIC(sz) GC_malloc_atomic(sz)
+# define GC_MALLOC_UNCOLLECTABLE(sz) GC_malloc_uncollectable(sz)
+# define GC_REALLOC(old, sz) GC_realloc(old, sz)
+# define GC_FREE(p) GC_free(p)
+# define GC_REGISTER_FINALIZER(p, f, d, of, od) \
+ GC_register_finalizer(p, f, d, of, od)
+# define GC_REGISTER_FINALIZER_IGNORE_SELF(p, f, d, of, od) \
+ GC_register_finalizer_ignore_self(p, f, d, of, od)
+# define GC_MALLOC_STUBBORN(sz) GC_malloc_stubborn(sz)
+# define GC_CHANGE_STUBBORN(p) GC_change_stubborn(p)
+# define GC_END_STUBBORN_CHANGE(p) GC_end_stubborn_change(p)
+# define GC_GENERAL_REGISTER_DISAPPEARING_LINK(link, obj) \
+ GC_general_register_disappearing_link(link, obj)
+# define GC_REGISTER_DISPLACEMENT(n) GC_register_displacement(n)
+# endif
+/* The following are included because they are often convenient, and */
+/* reduce the chance for a misspecifed size argument. But calls may */
+/* expand to something syntactically incorrect if t is a complicated */
+/* type expression. */
+# define GC_NEW(t) (t *)GC_MALLOC(sizeof (t))
+# define GC_NEW_ATOMIC(t) (t *)GC_MALLOC_ATOMIC(sizeof (t))
+# define GC_NEW_STUBBORN(t) (t *)GC_MALLOC_STUBBORN(sizeof (t))
+# define GC_NEW_UNCOLLECTABLE(t) (t *)GC_MALLOC_UNCOLLECTABLE(sizeof (t))
+
+/* Finalization. Some of these primitives are grossly unsafe. */
+/* The idea is to make them both cheap, and sufficient to build */
+/* a safer layer, closer to PCedar finalization. */
+/* The interface represents my conclusions from a long discussion */
+/* with Alan Demers, Dan Greene, Carl Hauser, Barry Hayes, */
+/* Christian Jacobi, and Russ Atkinson. It's not perfect, and */
+/* probably nobody else agrees with it. Hans-J. Boehm 3/13/92 */
+typedef void (*GC_finalization_proc)
+ GC_PROTO((GC_PTR obj, GC_PTR client_data));
+
+GC_API void GC_register_finalizer
+ GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
+ GC_finalization_proc *ofn, GC_PTR *ocd));
+GC_API void GC_debug_register_finalizer
+ GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
+ GC_finalization_proc *ofn, GC_PTR *ocd));
+ /* When obj is no longer accessible, invoke */
+ /* (*fn)(obj, cd). If a and b are inaccessible, and */
+ /* a points to b (after disappearing links have been */
+ /* made to disappear), then only a will be */
+ /* finalized. (If this does not create any new */
+ /* pointers to b, then b will be finalized after the */
+ /* next collection.) Any finalizable object that */
+ /* is reachable from itself by following one or more */
+ /* pointers will not be finalized (or collected). */
+ /* Thus cycles involving finalizable objects should */
+ /* be avoided, or broken by disappearing links. */
+ /* All but the last finalizer registered for an object */
+ /* is ignored. */
+ /* Finalization may be removed by passing 0 as fn. */
+ /* Finalizers are implicitly unregistered just before */
+ /* they are invoked. */
+ /* The old finalizer and client data are stored in */
+ /* *ofn and *ocd. */
+ /* Fn is never invoked on an accessible object, */
+ /* provided hidden pointers are converted to real */
+ /* pointers only if the allocation lock is held, and */
+ /* such conversions are not performed by finalization */
+ /* routines. */
+ /* If GC_register_finalizer is aborted as a result of */
+ /* a signal, the object may be left with no */
+ /* finalization, even if neither the old nor new */
+ /* finalizer were NULL. */
+ /* Obj should be the nonNULL starting address of an */
+ /* object allocated by GC_malloc or friends. */
+ /* Note that any garbage collectable object referenced */
+ /* by cd will be considered accessible until the */
+ /* finalizer is invoked. */
+
+/* Another versions of the above follow. It ignores */
+/* self-cycles, i.e. pointers from a finalizable object to */
+/* itself. There is a stylistic argument that this is wrong, */
+/* but it's unavoidable for C++, since the compiler may */
+/* silently introduce these. It's also benign in that specific */
+/* case. */
+GC_API void GC_register_finalizer_ignore_self
+ GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
+ GC_finalization_proc *ofn, GC_PTR *ocd));
+GC_API void GC_debug_register_finalizer_ignore_self
+ GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
+ GC_finalization_proc *ofn, GC_PTR *ocd));
+
+/* The following routine may be used to break cycles between */
+/* finalizable objects, thus causing cyclic finalizable */
+/* objects to be finalized in the correct order. Standard */
+/* use involves calling GC_register_disappearing_link(&p), */
+/* where p is a pointer that is not followed by finalization */
+/* code, and should not be considered in determining */
+/* finalization order. */
+GC_API int GC_register_disappearing_link GC_PROTO((GC_PTR * /* link */));
+ /* Link should point to a field of a heap allocated */
+ /* object obj. *link will be cleared when obj is */
+ /* found to be inaccessible. This happens BEFORE any */
+ /* finalization code is invoked, and BEFORE any */
+ /* decisions about finalization order are made. */
+ /* This is useful in telling the finalizer that */
+ /* some pointers are not essential for proper */
+ /* finalization. This may avoid finalization cycles. */
+ /* Note that obj may be resurrected by another */
+ /* finalizer, and thus the clearing of *link may */
+ /* be visible to non-finalization code. */
+ /* There's an argument that an arbitrary action should */
+ /* be allowed here, instead of just clearing a pointer. */
+ /* But this causes problems if that action alters, or */
+ /* examines connectivity. */
+ /* Returns 1 if link was already registered, 0 */
+ /* otherwise. */
+ /* Only exists for backward compatibility. See below: */
+
+GC_API int GC_general_register_disappearing_link
+ GC_PROTO((GC_PTR * /* link */, GC_PTR obj));
+ /* A slight generalization of the above. *link is */
+ /* cleared when obj first becomes inaccessible. This */
+ /* can be used to implement weak pointers easily and */
+ /* safely. Typically link will point to a location */
+ /* holding a disguised pointer to obj. (A pointer */
+ /* inside an "atomic" object is effectively */
+ /* disguised.) In this way soft */
+ /* pointers are broken before any object */
+ /* reachable from them are finalized. Each link */
+ /* May be registered only once, i.e. with one obj */
+ /* value. This was added after a long email discussion */
+ /* with John Ellis. */
+ /* Obj must be a pointer to the first word of an object */
+ /* we allocated. It is unsafe to explicitly deallocate */
+ /* the object containing link. Explicitly deallocating */
+ /* obj may or may not cause link to eventually be */
+ /* cleared. */
+GC_API int GC_unregister_disappearing_link GC_PROTO((GC_PTR * /* link */));
+ /* Returns 0 if link was not actually registered. */
+ /* Undoes a registration by either of the above two */
+ /* routines. */
+
+/* Auxiliary fns to make finalization work correctly with displaced */
+/* pointers introduced by the debugging allocators. */
+GC_API GC_PTR GC_make_closure GC_PROTO((GC_finalization_proc fn, GC_PTR data));
+GC_API void GC_debug_invoke_finalizer GC_PROTO((GC_PTR obj, GC_PTR data));
+
+GC_API int GC_invoke_finalizers GC_PROTO((void));
+ /* Run finalizers for all objects that are ready to */
+ /* be finalized. Return the number of finalizers */
+ /* that were run. Normally this is also called */
+ /* implicitly during some allocations. If */
+ /* GC-finalize_on_demand is nonzero, it must be called */
+ /* explicitly. */
+
+/* GC_set_warn_proc can be used to redirect or filter warning messages. */
+/* p may not be a NULL pointer. */
+typedef void (*GC_warn_proc) GC_PROTO((char *msg, GC_word arg));
+GC_API GC_warn_proc GC_set_warn_proc GC_PROTO((GC_warn_proc p));
+ /* Returns old warning procedure. */
+
+/* The following is intended to be used by a higher level */
+/* (e.g. cedar-like) finalization facility. It is expected */
+/* that finalization code will arrange for hidden pointers to */
+/* disappear. Otherwise objects can be accessed after they */
+/* have been collected. */
+/* Note that putting pointers in atomic objects or in */
+/* nonpointer slots of "typed" objects is equivalent to */
+/* disguising them in this way, and may have other advantages. */
+# if defined(I_HIDE_POINTERS) || defined(GC_I_HIDE_POINTERS)
+ typedef GC_word GC_hidden_pointer;
+# define HIDE_POINTER(p) (~(GC_hidden_pointer)(p))
+# define REVEAL_POINTER(p) ((GC_PTR)(HIDE_POINTER(p)))
+ /* Converting a hidden pointer to a real pointer requires verifying */
+ /* that the object still exists. This involves acquiring the */
+ /* allocator lock to avoid a race with the collector. */
+# endif /* I_HIDE_POINTERS */
+
+typedef GC_PTR (*GC_fn_type) GC_PROTO((GC_PTR client_data));
+GC_API GC_PTR GC_call_with_alloc_lock
+ GC_PROTO((GC_fn_type fn, GC_PTR client_data));
+
+/* Check that p and q point to the same object. */
+/* Fail conspicuously if they don't. */
+/* Returns the first argument. */
+/* Succeeds if neither p nor q points to the heap. */
+/* May succeed if both p and q point to between heap objects. */
+GC_API GC_PTR GC_same_obj GC_PROTO((GC_PTR p, GC_PTR q));
+
+/* Checked pointer pre- and post- increment operations. Note that */
+/* the second argument is in units of bytes, not multiples of the */
+/* object size. This should either be invoked from a macro, or the */
+/* call should be automatically generated. */
+GC_API GC_PTR GC_pre_incr GC_PROTO((GC_PTR *p, size_t how_much));
+GC_API GC_PTR GC_post_incr GC_PROTO((GC_PTR *p, size_t how_much));
+
+/* Check that p is visible */
+/* to the collector as a possibly pointer containing location. */
+/* If it isn't fail conspicuously. */
+/* Returns the argument in all cases. May erroneously succeed */
+/* in hard cases. (This is intended for debugging use with */
+/* untyped allocations. The idea is that it should be possible, though */
+/* slow, to add such a call to all indirect pointer stores.) */
+/* Currently useless for multithreaded worlds. */
+GC_API GC_PTR GC_is_visible GC_PROTO((GC_PTR p));
+
+/* Check that if p is a pointer to a heap page, then it points to */
+/* a valid displacement within a heap object. */
+/* Fail conspicuously if this property does not hold. */
+/* Uninteresting with ALL_INTERIOR_POINTERS. */
+/* Always returns its argument. */
+GC_API GC_PTR GC_is_valid_displacement GC_PROTO((GC_PTR p));
+
+/* Safer, but slow, pointer addition. Probably useful mainly with */
+/* a preprocessor. Useful only for heap pointers. */
+#ifdef GC_DEBUG
+# define GC_PTR_ADD3(x, n, type_of_result) \
+ ((type_of_result)GC_same_obj((x)+(n), (x)))
+# define GC_PRE_INCR3(x, n, type_of_result) \
+ ((type_of_result)GC_pre_incr(&(x), (n)*sizeof(*x))
+# define GC_POST_INCR2(x, type_of_result) \
+ ((type_of_result)GC_post_incr(&(x), sizeof(*x))
+# ifdef __GNUC__
+# define GC_PTR_ADD(x, n) \
+ GC_PTR_ADD3(x, n, typeof(x))
+# define GC_PRE_INCR(x, n) \
+ GC_PRE_INCR3(x, n, typeof(x))
+# define GC_POST_INCR(x, n) \
+ GC_POST_INCR3(x, typeof(x))
+# else
+ /* We can't do this right without typeof, which ANSI */
+ /* decided was not sufficiently useful. Repeatedly */
+ /* mentioning the arguments seems too dangerous to be */
+ /* useful. So does not casting the result. */
+# define GC_PTR_ADD(x, n) ((x)+(n))
+# endif
+#else /* !GC_DEBUG */
+# define GC_PTR_ADD3(x, n, type_of_result) ((x)+(n))
+# define GC_PTR_ADD(x, n) ((x)+(n))
+# define GC_PRE_INCR3(x, n, type_of_result) ((x) += (n))
+# define GC_PRE_INCR(x, n) ((x) += (n))
+# define GC_POST_INCR2(x, n, type_of_result) ((x)++)
+# define GC_POST_INCR(x, n) ((x)++)
+#endif
+
+/* Safer assignment of a pointer to a nonstack location. */
+#ifdef GC_DEBUG
+# ifdef __STDC__
+# define GC_PTR_STORE(p, q) \
+ (*(void **)GC_is_visible(p) = GC_is_valid_displacement(q))
+# else
+# define GC_PTR_STORE(p, q) \
+ (*(char **)GC_is_visible(p) = GC_is_valid_displacement(q))
+# endif
+#else /* !GC_DEBUG */
+# define GC_PTR_STORE(p, q) *((p) = (q))
+#endif
+
+/* Fynctions called to report pointer checking errors */
+GC_API void (*GC_same_obj_print_proc) GC_PROTO((GC_PTR p, GC_PTR q));
+
+GC_API void (*GC_is_valid_displacement_print_proc)
+ GC_PROTO((GC_PTR p));
+
+GC_API void (*GC_is_visible_print_proc)
+ GC_PROTO((GC_PTR p));
+
+#if defined(_SOLARIS_PTHREADS) && !defined(SOLARIS_THREADS)
+# define SOLARIS_THREADS
+#endif
+
+#ifdef SOLARIS_THREADS
+/* We need to intercept calls to many of the threads primitives, so */
+/* that we can locate thread stacks and stop the world. */
+/* Note also that the collector cannot see thread specific data. */
+/* Thread specific data should generally consist of pointers to */
+/* uncollectable objects, which are deallocated using the destructor */
+/* facility in thr_keycreate. */
+# include <thread.h>
+# include <signal.h>
+ int GC_thr_create(void *stack_base, size_t stack_size,
+ void *(*start_routine)(void *), void *arg, long flags,
+ thread_t *new_thread);
+ int GC_thr_join(thread_t wait_for, thread_t *departed, void **status);
+ int GC_thr_suspend(thread_t target_thread);
+ int GC_thr_continue(thread_t target_thread);
+ void * GC_dlopen(const char *path, int mode);
+
+# ifdef _SOLARIS_PTHREADS
+# include <pthread.h>
+ extern int GC_pthread_create(pthread_t *new_thread,
+ const pthread_attr_t *attr,
+ void * (*thread_execp)(void *), void *arg);
+ extern int GC_pthread_join(pthread_t wait_for, void **status);
+
+# undef thread_t
+
+# define pthread_join GC_pthread_join
+# define pthread_create GC_pthread_create
+#endif
+
+# define thr_create GC_thr_create
+# define thr_join GC_thr_join
+# define thr_suspend GC_thr_suspend
+# define thr_continue GC_thr_continue
+# define dlopen GC_dlopen
+
+# endif /* SOLARIS_THREADS */
+
+
+#if defined(IRIX_THREADS) || defined(LINUX_THREADS)
+/* We treat these similarly. */
+# include <pthread.h>
+# include <signal.h>
+
+ int GC_pthread_create(pthread_t *new_thread,
+ const pthread_attr_t *attr,
+ void *(*start_routine)(void *), void *arg);
+ int GC_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset);
+ int GC_pthread_join(pthread_t thread, void **retval);
+
+# define pthread_create GC_pthread_create
+# define pthread_sigmask GC_pthread_sigmask
+# define pthread_join GC_pthread_join
+
+#endif /* IRIX_THREADS || LINUX_THREADS */
+
+# if defined(PCR) || defined(SOLARIS_THREADS) || defined(WIN32_THREADS) || \
+ defined(IRIX_THREADS) || defined(LINUX_THREADS) || \
+ defined(IRIX_JDK_THREADS)
+ /* Any flavor of threads except SRC_M3. */
+/* This returns a list of objects, linked through their first */
+/* word. Its use can greatly reduce lock contention problems, since */
+/* the allocation lock can be acquired and released many fewer times. */
+/* lb must be large enough to hold the pointer field. */
+GC_PTR GC_malloc_many(size_t lb);
+#define GC_NEXT(p) (*(GC_PTR *)(p)) /* Retrieve the next element */
+ /* in returned list. */
+extern void GC_thr_init(); /* Needed for Solaris/X86 */
+
+#endif /* THREADS && !SRC_M3 */
+
+/*
+ * If you are planning on putting
+ * the collector in a SunOS 5 dynamic library, you need to call GC_INIT()
+ * from the statically loaded program section.
+ * This circumvents a Solaris 2.X (X<=4) linker bug.
+ */
+#if defined(sparc) || defined(__sparc)
+# define GC_INIT() { extern end, etext; \
+ GC_noop(&end, &etext); }
+#else
+# if defined(__CYGWIN32__) && defined(GC_USE_DLL)
+ /*
+ * Similarly gnu-win32 DLLs need explicit initialization
+ */
+# define GC_INIT() { GC_add_roots(DATASTART, DATAEND); }
+# else
+# define GC_INIT()
+# endif
+#endif
+
+#if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
+ || defined(_WIN32)
+ /* win32S may not free all resources on process exit. */
+ /* This explicitly deallocates the heap. */
+ GC_API void GC_win32_free_heap ();
+#endif
+
+#ifdef __cplusplus
+ } /* end of extern "C" */
+#endif
+
+#endif /* _GC_H */
diff --git a/gc/cord/private/cord_pos.h b/gc/cord/private/cord_pos.h
new file mode 100644
index 0000000..d2b24bb
--- /dev/null
+++ b/gc/cord/private/cord_pos.h
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+/* Boehm, May 19, 1994 2:23 pm PDT */
+# ifndef CORD_POSITION_H
+
+/* The representation of CORD_position. This is private to the */
+/* implementation, but the size is known to clients. Also */
+/* the implementation of some exported macros relies on it. */
+/* Don't use anything defined here and not in cord.h. */
+
+# define MAX_DEPTH 48
+ /* The maximum depth of a balanced cord + 1. */
+ /* We don't let cords get deeper than MAX_DEPTH. */
+
+struct CORD_pe {
+ CORD pe_cord;
+ size_t pe_start_pos;
+};
+
+/* A structure describing an entry on the path from the root */
+/* to current position. */
+typedef struct CORD_Pos {
+ size_t cur_pos;
+ int path_len;
+# define CORD_POS_INVALID (0x55555555)
+ /* path_len == INVALID <==> position invalid */
+ const char *cur_leaf; /* Current leaf, if it is a string. */
+ /* If the current leaf is a function, */
+ /* then this may point to function_buf */
+ /* containing the next few characters. */
+ /* Always points to a valid string */
+ /* containing the current character */
+ /* unless cur_end is 0. */
+ size_t cur_start; /* Start position of cur_leaf */
+ size_t cur_end; /* Ending position of cur_leaf */
+ /* 0 if cur_leaf is invalid. */
+ struct CORD_pe path[MAX_DEPTH + 1];
+ /* path[path_len] is the leaf corresponding to cur_pos */
+ /* path[0].pe_cord is the cord we point to. */
+# define FUNCTION_BUF_SZ 8
+ char function_buf[FUNCTION_BUF_SZ]; /* Space for next few chars */
+ /* from function node. */
+} CORD_pos[1];
+
+/* Extract the cord from a position: */
+CORD CORD_pos_to_cord(CORD_pos p);
+
+/* Extract the current index from a position: */
+size_t CORD_pos_to_index(CORD_pos p);
+
+/* Fetch the character located at the given position: */
+char CORD_pos_fetch(CORD_pos p);
+
+/* Initialize the position to refer to the give cord and index. */
+/* Note that this is the most expensive function on positions: */
+void CORD_set_pos(CORD_pos p, CORD x, size_t i);
+
+/* Advance the position to the next character. */
+/* P must be initialized and valid. */
+/* Invalidates p if past end: */
+void CORD_next(CORD_pos p);
+
+/* Move the position to the preceding character. */
+/* P must be initialized and valid. */
+/* Invalidates p if past beginning: */
+void CORD_prev(CORD_pos p);
+
+/* Is the position valid, i.e. inside the cord? */
+int CORD_pos_valid(CORD_pos p);
+
+char CORD__pos_fetch(CORD_pos);
+void CORD__next(CORD_pos);
+void CORD__prev(CORD_pos);
+
+#define CORD_pos_fetch(p) \
+ (((p)[0].cur_end != 0)? \
+ (p)[0].cur_leaf[(p)[0].cur_pos - (p)[0].cur_start] \
+ : CORD__pos_fetch(p))
+
+#define CORD_next(p) \
+ (((p)[0].cur_pos + 1 < (p)[0].cur_end)? \
+ (p)[0].cur_pos++ \
+ : (CORD__next(p), 0))
+
+#define CORD_prev(p) \
+ (((p)[0].cur_end != 0 && (p)[0].cur_pos > (p)[0].cur_start)? \
+ (p)[0].cur_pos-- \
+ : (CORD__prev(p), 0))
+
+#define CORD_pos_to_index(p) ((p)[0].cur_pos)
+
+#define CORD_pos_to_cord(p) ((p)[0].path[0].pe_cord)
+
+#define CORD_pos_valid(p) ((p)[0].path_len != CORD_POS_INVALID)
+
+/* Some grubby stuff for performance-critical friends: */
+#define CORD_pos_chars_left(p) ((long)((p)[0].cur_end) - (long)((p)[0].cur_pos))
+ /* Number of characters in cache. <= 0 ==> none */
+
+#define CORD_pos_advance(p,n) ((p)[0].cur_pos += (n) - 1, CORD_next(p))
+ /* Advance position by n characters */
+ /* 0 < n < CORD_pos_chars_left(p) */
+
+#define CORD_pos_cur_char_addr(p) \
+ (p)[0].cur_leaf + ((p)[0].cur_pos - (p)[0].cur_start)
+ /* address of current character in cache. */
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 05:45:32 +0000