Initial revision

1 files changed, 1493 insertions, 0 deletions

diff --git a/etc.c b/etc.c
new file mode 100644
index 0000000..8603142
--- /dev/null
+++ b/etc.c
@@ -0,0 +1,1493 @@
+/* $Id: etc.c,v 1.1 2001/11/08 05:14:33 a-ito Exp $ */
+#include "fm.h"
+#include <pwd.h>
+#include "myctype.h"
+#include "html.h"
+#include "local.h"
+#include "hash.h"
+#include "terms.h"
+
+#ifdef GETCWD
+#include <unistd.h>
+#include <sys/param.h>
+#endif				/* GETCWD */
+
+#include <sys/types.h>
+#include <time.h>
+#include <sys/wait.h>
+
+#ifdef	__WATT32__
+#define	read(a,b,c)	read_s(a,b,c)
+#define	close(x)	close_s(x)
+#endif				/* __WATT32__ */
+
+#ifndef STRCASECMP
+int
+strcasecmp(char *s1, char *s2)
+{
+    int x;
+    while (*s1) {
+	x = tolower(*s1) - tolower(*s2);
+	if (x != 0)
+	    break;
+	s1++;
+	s2++;
+    }
+    if (x != 0)
+	return x;
+    return -tolower(*s2);
+}
+
+int
+strncasecmp(char *s1, char *s2, int n)
+{
+    int x;
+    while (*s1 && n) {
+	x = tolower(*s1) - tolower(*s2);
+	if (x != 0)
+	    break;
+	s1++;
+	s2++;
+	n--;
+    }
+    if (x != 0)
+	return x;
+    return 0;
+}
+#endif				/* not STRCASECMP */
+
+int
+arg_is(char *str, char *tag)
+{
+    while (*tag) {
+	if (tolower(*tag) != tolower(*str))
+	    return 0;
+	tag++;
+	str++;
+    }
+    while (*str && (*str == ' ' || *str == '\t'))
+	str++;
+    return (*str == '=');
+}
+
+int
+columnSkip(Buffer * buf, int offset)
+{
+    int i, maxColumn;
+    int column = buf->currentColumn + offset;
+    int nlines = LASTLINE + 1;
+    Line *l;
+
+    maxColumn = 0;
+    for (i = 0, l = buf->topLine;
+	 i < nlines && l != NULL;
+	 i++, l = l->next) {
+	if (l->width < 0)
+	    l->width = COLPOS(l, l->len);
+	if (l->width - 1 > maxColumn)
+	    maxColumn = l->width - 1;
+    }
+    maxColumn -= COLS - 1;
+    if (column < maxColumn)
+	maxColumn = column;
+    if (maxColumn < 0)
+	maxColumn = 0;
+
+    if (buf->currentColumn == maxColumn)
+	return 0;
+    buf->currentColumn = maxColumn;
+    return 1;
+}
+
+int
+columnPos(Line * line, int column)
+{
+    int i;
+
+    for (i = 1; i < line->len; i++) {
+	if (COLPOS(line, i) > column) {
+#ifdef JP_CHARSET
+	    if (CharType(line->propBuf[i - 1]) == PC_KANJI2)
+		return i - 2;
+#endif
+	    return i - 1;
+	}
+    }
+    return i - 1;
+}
+
+Line *
+lineSkip(Buffer * buf, Line * line, int offset, int last)
+{
+    int i;
+    Line *l;
+
+    l = currentLineSkip(buf, line, offset, last);
+    for (i = (LASTLINE - 1) - (buf->lastLine->linenumber - l->linenumber);
+	i > 0 && l->prev != NULL;
+	i--, l = l->prev);
+    return l;
+}
+
+Line *
+currentLineSkip(Buffer * buf, Line * line, int offset, int last)
+{
+    int i, n;
+    Line *l = line;
+
+    if (buf->pagerSource && !(buf->bufferprop & BP_CLOSE)) {
+	n = line->linenumber + offset + LASTLINE;
+	if (buf->lastLine->linenumber < n)
+	    getNextPage(buf, n - buf->lastLine->linenumber);
+	while ((last || (buf->lastLine->linenumber < n)) &&
+	       (getNextPage(buf, 1) != NULL));
+	if (last)
+	    l = buf->lastLine;
+    }
+
+    if (offset == 0)
+	return l;
+    if (offset > 0)
+	for (i = 0; i < offset && l->next != NULL; i++, l = l->next);
+    else
+	for (i = 0; i < -offset && l->prev != NULL; i++, l = l->prev);
+    return l;
+}
+
+#define MAX_CMD_LEN 128
+
+static int
+get_cmd(Hash_si * hash,
+	char **s,
+	char *args,
+	char termchar,
+	int defaultcmd,
+	int allow_space,
+	int *status)
+{
+    char cmdstr[MAX_CMD_LEN];
+    char *p = cmdstr;
+    char *save = *s;
+    int cmd;
+    if (status)
+	*status = 0;
+    (*s)++;
+    /* first character */
+    if (IS_ALNUM(**s) || **s == '_' || **s == '/')
+	*(p++) = tolower(*((*s)++));
+    else
+	return defaultcmd;
+    if (p[-1] == '/')
+	SKIP_BLANKS(*s);
+    while ((IS_ALNUM(**s) || **s == '_') &&
+	   p - cmdstr < MAX_CMD_LEN) {
+	*(p++) = tolower(*((*s)++));
+    }
+    if (p - cmdstr == MAX_CMD_LEN) {
+	/* buffer overflow: perhaps caused by bad HTML source */
+	*s = save + 1;
+	if (status)
+	    *status = -1;
+	return defaultcmd;
+    }
+    *p = '\0';
+
+    /* hash search */
+    cmd = getHash_si(hash, cmdstr, defaultcmd);
+    if (args != NULL) {
+	p = args;
+	while (**s == ' ' || **s == '\t')
+	    (*s)++;
+	while (**s && **s != '\n' && **s != '\r' && **s != termchar) {
+	    *(p++) = *((*s)++);
+	}
+	*p = '\0';
+    }
+    else if (allow_space) {
+	while (**s && **s != termchar)
+	    (*s)++;
+    }
+    if (**s == termchar)
+	(*s)++;
+    else if (status)
+	*status = -1;
+    return cmd;
+}
+
+int
+gethtmlcmd(char **s, int *status)
+{
+    extern Hash_si tagtable;
+    return get_cmd(&tagtable, s, NULL, '>', HTML_UNKNOWN, TRUE, status);
+}
+
+static char *
+searchAnchorArg(char **arg)
+{
+    char *p;
+    if (**arg == '"') {
+	(*arg)++;
+	p = *arg;
+	while (*p && *p != '"')
+	    p++;
+    }
+    else {
+	p = *arg;
+	while (*p && *p != '>' && *p != ' ' && *p != ',' &&
+	       *p != '\t' && *p != '\n')
+	    p++;
+    }
+    return p;
+}
+
+char *
+getAnchor(char *arg, char **arg_return)
+{
+    char *p;
+    char buf[LINELEN];
+
+    if (arg_is(arg, "name")) {
+	arg += 4;
+	while (*arg && (*arg == ' ' || *arg == '\t'))
+	    arg++;
+	if (*arg != '=')
+	    return NULL;
+	arg++;
+	while (*arg && (*arg == ' ' || *arg == '\t'))
+	    arg++;
+	p = searchAnchorArg(&arg);
+	buf[0] = '#';
+	strncpy(&buf[1], arg, p - arg);
+	if (arg_return)
+	    *arg_return = p;
+	return allocStr(buf, p - arg + 1);
+    }
+    while (*arg && *arg != '=')
+	arg++;
+    if (*arg == '\0')
+	return NULL;
+    arg++;
+    while (*arg && (*arg == ' ' || *arg == '\t'))
+	arg++;
+    p = searchAnchorArg(&arg);
+    if (arg_return)
+	*arg_return = p;
+    if (p == arg)
+	return allocStr(" ", 1);
+    return allocStr(arg, p - arg);
+}
+
+#ifdef ANSI_COLOR
+static int
+parse_ansi_color(char **str, Lineprop *effect, Linecolor *color)
+{
+    char *p = *str, *q;
+    Lineprop e = *effect;
+    Linecolor c = *color;
+    int i;
+
+    if (*p != ESC_CODE || *(p+1) != '[')
+	return 0;
+    p += 2;
+    for (q = p; IS_DIGIT(*q) || *q == ';'; q++)
+	;
+    if (*q != 'm')
+	return 0;
+    *str = q + 1;
+    while (1) {
+	if (*p == 'm') {
+	    e = PE_NORMAL;
+	    c = 0;
+	    break;
+	}
+	if (IS_DIGIT(*p)) {
+	    q = p;
+	    for (p++; IS_DIGIT(*p); p++)
+		;
+	    i = atoi(allocStr(q, p - q));
+	    switch (i) {
+	    case 0:
+		e = PE_NORMAL;
+		c = 0;
+		break;
+	    case 1:
+	    case 5:
+		e = PE_BOLD;
+		break;
+	    case 4:
+		e = PE_UNDER;
+		break;
+	    case 7:
+		e = PE_STAND;
+		break;
+	    case 100:	/* for EWS4800 kterm */
+		c = 0;
+		break;
+	    case 39:
+		c &= 0xf0;
+		break;
+	    case 49:
+		c &= 0x0f;
+		break;
+	    default:
+		if (i >= 30 && i <= 37)
+		    c = (c & 0xf0) | (i - 30) | 0x08;
+		else if (i >= 40 && i <= 47)
+		    c = (c & 0x0f) | ((i - 40) << 4) | 0x80;
+		break;
+	    }
+	    if (*p == 'm')
+		break;
+	} else {
+	    e = PE_NORMAL;
+	    c = 0;
+	    break;
+	}
+	p++;	/* *p == ';' */
+    }
+    *effect = e;
+    *color = c;
+    return 1;
+}
+#endif
+
+/* 
+ * Check character type
+ */
+
+Str
+checkType(Str s, Lineprop * oprop,
+#ifdef ANSI_COLOR
+	  Linecolor * ocolor, int * check_color,
+#endif
+	  int len)
+{
+    Lineprop mode;
+    Lineprop effect = PE_NORMAL;
+    Lineprop *prop = oprop;
+    char *str = s->ptr, *endp = &s->ptr[s->length], *bs = NULL;
+#ifdef ANSI_COLOR
+    Lineprop ceffect = PE_NORMAL;
+    Linecolor cmode = 0;
+    Linecolor *color = NULL;
+    char *es = NULL;
+#endif
+    int do_copy = FALSE;
+    int size = (len < s->length) ? len : s->length;
+
+#ifdef ANSI_COLOR
+    if (check_color)
+	*check_color = FALSE;
+#endif
+    if (ShowEffect) {
+	bs = memchr(str, '\b', s->length);
+#ifdef ANSI_COLOR
+	if (ocolor) {
+	    es = memchr(str, ESC_CODE, s->length);
+	    if (es)
+		color = ocolor;
+	}
+#endif
+	if (s->length > size || (bs != NULL)
+#ifdef ANSI_COLOR
+	    || (es != NULL)
+#endif
+	    ) {
+	    s = Strnew_size(size);
+	    do_copy = TRUE;
+	}
+    }
+
+    while (str < endp) {
+	if (prop - oprop >= len)
+	    break;
+	if (bs != NULL) {
+	    if (str == bs - 2 && !strncmp(str, "__\b\b", 4)) {
+		str += 4;
+		effect = PE_UNDER;
+		if (str < endp)
+		    bs = memchr(str, '\b', endp - str);
+		continue;
+	    }
+	    else if (str == bs - 1 && *str == '_') {
+		str += 2;
+		effect = PE_UNDER;
+		if (str < endp)
+		    bs = memchr(str, '\b', endp - str);
+		continue;
+	    }
+	    else if (str == bs) {
+		if (*(str + 1) == '_') {
+#ifdef JP_CHARSET
+		    if (s->length > 1 && CharType(*(prop - 2)) == PC_KANJI1) {
+			str += 2;
+			*(prop - 1) |= PE_UNDER;
+			*(prop - 2) |= PE_UNDER;
+		    }
+		    else
+#endif				/* JP_CHARSET */
+		    if (s->length > 0) {
+			str += 2;
+			*(prop - 1) |= PE_UNDER;
+		    }
+		    else {
+			str++;
+		    }
+		}
+		else if (!strncmp(str + 1, "\b__", 3)) {
+#ifdef JP_CHARSET
+		    if (s->length > 1 && CharType(*(prop - 2)) == PC_KANJI1) {
+			str += 4;
+			*(prop - 1) |= PE_UNDER;
+			*(prop - 2) |= PE_UNDER;
+		    }
+		    else
+#endif				/* JP_CHARSET */
+		    if (s->length > 0) {
+			str += 3;
+			*(prop - 1) |= PE_UNDER;
+		    }
+		    else {
+			str += 2;
+		    }
+		}
+		else if (*(str + 1) == '\b') {
+#ifdef JP_CHARSET
+		    if (s->length > 1 && CharType(*(prop - 2)) == PC_KANJI1) {
+			if (str + 4 <= endp &&
+			    !strncmp(str - 2, str + 2, 2)) {
+			    *(prop - 1) |= PE_BOLD;
+			    *(prop - 2) |= PE_BOLD;
+			    str += 4;
+			}
+			else {
+			    Strshrink(s, 2);
+			    prop -= 2;
+			    str += 2;
+			}
+		    }
+		    else
+#endif				/* JP_CHARSET */
+		    if (s->length > 0) {
+			if (str + 3 <= endp &&
+			    *(str - 1) == *(str + 2)) {
+			    *(prop - 1) |= PE_BOLD;
+			    str += 3;
+			}
+			else {
+			    Strshrink(s, 1);
+			    prop--;
+			    str += 2;
+			}
+		    }
+		    else {
+			str += 2;
+		    }
+		}
+		else {
+#ifdef JP_CHARSET
+		    if (s->length > 1 && CharType(*(prop - 2)) == PC_KANJI1) {
+			if (str + 3 <= endp &&
+			    !strncmp(str - 2, str + 1, 2)) {
+			    *(prop - 1) |= PE_BOLD;
+			    *(prop - 2) |= PE_BOLD;
+			    str += 3;
+			}
+			else {
+			    Strshrink(s, 2);
+			    prop -= 2;
+			    str++;
+			}
+		    }
+		    else
+#endif				/* JP_CHARSET */
+		    if (s->length > 0) {
+			if (str + 2 <= endp &&
+			    *(str - 1) == *(str + 1)) {
+			    *(prop - 1) |= PE_BOLD;
+			    str += 2;
+			}
+			else {
+			    Strshrink(s, 1);
+			    prop--;
+			    str++;
+			}
+		    }
+		    else {
+			str++;
+		    }
+		}
+		if (str < endp)
+		    bs = memchr(str, '\b', endp - str);
+		continue;
+	    }
+#ifdef ANSI_COLOR
+	    else if (str > bs)
+		bs = memchr(str, '\b', endp - str);
+#endif
+	}
+#ifdef ANSI_COLOR
+	if (es != NULL) {
+	    if (str == es) {
+		int ok = parse_ansi_color(&str, &ceffect, &cmode);
+		if (str < endp)
+		    es = memchr(str, ESC_CODE, endp - str);
+		if (ok) {
+		    if (cmode)
+			*check_color = TRUE;
+		    continue;
+		}
+	    }
+	    else if (str > es)
+		es = memchr(str, ESC_CODE, endp - str);
+	}
+#endif
+
+	mode = get_mctype(str);
+#ifdef ANSI_COLOR
+	effect |= ceffect;
+#endif
+#ifdef JP_CHARSET
+	if (mode == PC_KANJI) {
+	    prop[0] = (effect | PC_KANJI1);
+	    prop[1] = (effect | PC_KANJI2);
+	    if (do_copy) {
+		Strcat_char(s, str[0]);
+		Strcat_char(s, str[1]);
+	    }
+	    prop += 2;
+	    str += 2;
+#ifdef ANSI_COLOR
+	    if (color) {
+		color[0] = cmode;
+		color[1] = cmode;
+		color += 2;
+	    }
+#endif
+	}
+	else
+#endif				/* JP_CHARSET */
+	{
+	    *prop = (effect | mode);
+	    if (do_copy)
+		Strcat_char(s, *str);
+	    prop++;
+	    str++;
+#ifdef ANSI_COLOR
+	    if (color) {
+		*color = cmode;
+		color++;
+	    }
+#endif
+	}
+	effect = PE_NORMAL;
+    }
+    return s;
+}
+
+int
+calcPosition(char *l, Lineprop *pr, int len, int pos, int bpos, int mode)
+{
+    static short realColumn[LINELEN + 1];
+    static char *prevl = NULL;
+    int i, j;
+
+    if (l == NULL || len == 0)
+	return bpos;
+    if (l == prevl && mode == CP_AUTO) {
+        if (pos <= len)
+	    return realColumn[pos];
+    }
+    prevl = l;
+    j = bpos;
+    for (i = 0;; i++) {
+	realColumn[i] = j;
+        if (i == len)
+            break;
+	if (l[i] == '\t' && pr[i] == PC_CTRL)
+	    j = (j + Tabstop) / Tabstop * Tabstop;
+#ifndef KANJI_SYMBOLS
+	else if (pr[i] & PC_RULE)
+	    j++;
+#endif
+	else if (IS_UNPRINTABLE_ASCII(l[i], pr[i]))
+	    j = j + 4;
+	else if (IS_UNPRINTABLE_CONTROL(l[i], pr[i]))
+	    j = j + 2;
+	else
+	    j++;
+    }
+    if (pos >= i)
+	return j;
+    return realColumn[pos];
+}
+
+char *
+lastFileName(char *path)
+{
+    char *p, *q;
+
+    p = q = path;
+    while (*p != '\0') {
+	if (*p == '/')
+	    q = p + 1;
+	p++;
+    }
+
+    return allocStr(q, 0);
+}
+
+#ifdef NOBCOPY
+void
+bcopy(void *src, void *dest, int len)
+{
+    int i;
+    if (src == dest)
+	return;
+    if (src < dest) {
+	for (i = len - 1; i >= 0; i--)
+	    dest[i] = src[i];
+    }
+    else {			/* src > dest */
+	for (i = 0; i < len; i++)
+	    dest[i] = src[i];
+    }
+}
+
+void
+bzero(void *ptr, int len)
+{
+    int i;
+    for (i = 0; i < len; i++)
+	*(ptr++) = 0;
+}
+#endif				/* NOBCOPY */
+
+char *
+mybasename(char *s)
+{
+    char *p = s;
+    while (*p)
+	p++;
+    while (s <= p && *p != '/')
+	p--;
+    if (*p == '/')
+	p++;
+    else
+	p = s;
+    return allocStr(p, 0);
+}
+
+char *
+mydirname(char *s)
+{
+    char *p = s;
+    while (*p)
+	p++;
+    if (s != p)
+	p--;
+    while (s != p && *p == '/')
+	p--;
+    while (s != p && *p != '/')
+	p--;
+    if (*p != '/')
+	return ".";
+    while (s != p && *p == '/')
+	p--;
+    return allocStr(s, strlen(s) - strlen(p) + 1);
+}
+
+#ifndef STRERROR
+char *
+strerror(int errno)
+{
+    extern char *sys_errlist[];
+    return sys_errlist[errno];
+}
+#endif				/* not STRERROR */
+
+#ifndef SYS_ERRLIST
+char **sys_errlist;
+
+prepare_sys_errlist()
+{
+    int i, n;
+
+    i = 1;
+    while (strerror(i) != NULL)
+	i++;
+    n = i;
+    sys_errlist = New_N(char *, n);
+    sys_errlist[0] = "";
+    for (i = 1; i < n; i++)
+	sys_errlist[i] = strerror(i);
+}
+#endif				/* not SYS_ERRLIST */
+
+int
+next_status(char c, int *status)
+{
+    switch (*status) {
+    case R_ST_NORMAL:
+	if (c == '<') {
+	    *status = R_ST_TAG0;
+	    return 0;
+	}
+	else if (c == '&') {
+	    *status = R_ST_AMP;
+	    return 1;
+	}
+	else
+	    return 1;
+	break;
+    case R_ST_TAG0:
+	if (c == '!') {
+	    *status = R_ST_CMNT1;
+	    return 0;
+	}
+	*status = R_ST_TAG;
+	/* continues to next case */
+    case R_ST_TAG:
+	if (c == '>')
+	    *status = R_ST_NORMAL;
+	else if (c == '=')
+	    *status = R_ST_EQL;
+	return 0;
+    case R_ST_EQL:
+	if (c == '"')
+	    *status = R_ST_DQUOTE;
+	else if (c == '\'')
+	    *status = R_ST_QUOTE;
+	else if (IS_SPACE(c))
+	    *status = R_ST_EQL;
+	else if (c == '>')
+	    *status = R_ST_NORMAL;
+	else
+	    *status = R_ST_TAG;
+	return 0;
+    case R_ST_QUOTE:
+	if (c == '\'')
+	    *status = R_ST_TAG;
+	return 0;
+    case R_ST_DQUOTE:
+	if (c == '"')
+	    *status = R_ST_TAG;
+	return 0;
+    case R_ST_AMP:
+	if (c == ';') {
+	    *status = R_ST_NORMAL;
+	    return 0;
+	}
+	else if (c != '#' && !IS_ALNUM(c) && c != '_') {
+	    /* something's wrong! */
+	    *status = R_ST_NORMAL;
+	    return 0;
+	}
+	else
+	    return 0;
+    case R_ST_CMNT1:
+	switch (c) {
+	case '-':
+	    *status = R_ST_CMNT2;
+	    break;
+	case '>':
+	    *status = R_ST_NORMAL;
+	    break;
+	default:
+	    *status = R_ST_IRRTAG;
+	}
+	return 0;
+    case R_ST_CMNT2:
+	switch (c) {
+	case '-':
+	    *status = R_ST_CMNT;
+	    break;
+	case '>':
+	    *status = R_ST_NORMAL;
+	    break;
+	default:
+	    *status = R_ST_IRRTAG;
+	}
+	return 0;
+    case R_ST_CMNT:
+	if (c == '-')
+	    *status = R_ST_NCMNT1;
+	return 0;
+    case R_ST_NCMNT1:
+	if (c == '-')
+	    *status = R_ST_NCMNT2;
+	else
+	    *status = R_ST_CMNT;
+	return 0;
+    case R_ST_NCMNT2:
+	switch (c) {
+	case '>':
+	    *status = R_ST_NORMAL;
+	    break;
+	case '-':
+	    *status = R_ST_NCMNT2;
+	    break;
+	default:
+	    if (IS_SPACE(c))
+		*status = R_ST_NCMNT3;
+	    else
+		*status = R_ST_CMNT;
+	    break;
+	}
+	break;
+    case R_ST_NCMNT3:
+	switch (c) {
+	case '>':
+	    *status = R_ST_NORMAL;
+	    break;
+	case '-':
+	    *status = R_ST_NCMNT1;
+	    break;
+	default:
+	    if (IS_SPACE(c))
+		*status = R_ST_NCMNT3;
+	    else
+		*status = R_ST_CMNT;
+	    break;
+	}
+	return 0;
+    case R_ST_IRRTAG:
+	if (c == '>')
+	    *status = R_ST_NORMAL;
+	return 0;
+    }
+    /* notreached */
+    return 0;
+}
+
+int
+read_token(Str buf, char **instr, int *status, int pre, int append)
+{
+    char *p;
+    int prev_status;
+
+    if (!append)
+	Strclear(buf);
+    if (**instr == '\0')
+	return 0;
+    for (p = *instr; *p; p++) {
+	prev_status = *status;
+	next_status(*p, status);
+	switch (*status) {
+	case R_ST_NORMAL:
+	    if (prev_status == R_ST_AMP && *p != ';') {
+		p--;
+		break;
+	    }
+	    if (prev_status == R_ST_NCMNT2 || prev_status == R_ST_NCMNT3 ||
+		prev_status == R_ST_IRRTAG || prev_status == R_ST_CMNT1) {
+		if (prev_status == R_ST_CMNT1 && !append)
+		    Strclear(buf);
+		p++;
+		goto proc_end;
+	    }
+	    Strcat_char(buf, (!pre && IS_SPACE(*p)) ? ' ' : *p);
+	    if (ST_IS_REAL_TAG(prev_status)) {
+		*instr = p + 1;
+		if (buf->length < 2 ||
+		    buf->ptr[buf->length - 2] != '<' ||
+		    buf->ptr[buf->length - 1] != '>')
+		    return 1;
+		Strshrink(buf, 2);
+	    }
+	    break;
+	case R_ST_TAG0:
+	case R_ST_TAG:
+	    if (prev_status == R_ST_NORMAL && p != *instr) {
+		*instr = p;
+		*status = prev_status;
+		return 1;
+	    }
+	    if (*status == R_ST_TAG0 &&
+		!REALLY_THE_BEGINNING_OF_A_TAG(p)) {
+		/* it seems that this '<' is not a beginning of a tag */
+		Strcat_charp(buf, "&lt;");
+		*status = R_ST_NORMAL;
+	    }
+	    else
+		Strcat_char(buf, *p);
+	    break;
+	case R_ST_EQL:
+	case R_ST_QUOTE:
+	case R_ST_DQUOTE:
+	case R_ST_AMP:
+	    Strcat_char(buf, *p);
+	    break;
+	case R_ST_CMNT:
+	case R_ST_IRRTAG:
+	    if (!append)
+		Strclear(buf);
+	    break;
+	case R_ST_CMNT1:
+	case R_ST_CMNT2:
+	case R_ST_NCMNT1:
+	case R_ST_NCMNT2:
+	case R_ST_NCMNT3:
+	    /* do nothing */
+	    break;
+	}
+    }
+  proc_end:
+    *instr = p;
+    return 1;
+}
+
+Str
+correct_irrtag(int status)
+{
+    char c;
+    Str tmp = Strnew();
+
+    while (status != R_ST_NORMAL) {
+	switch (status) {
+	case R_ST_CMNT:		/* required "-->" */
+	case R_ST_NCMNT1:	/* required "->" */
+	    c = '-';
+	    break;
+	case R_ST_NCMNT2:
+	case R_ST_NCMNT3:
+	case R_ST_IRRTAG:
+	case R_ST_CMNT1:
+	case R_ST_CMNT2:
+	case R_ST_TAG:
+	case R_ST_TAG0:
+	case R_ST_EQL:		/* required ">" */
+	    c = '>';
+	    break;
+	case R_ST_QUOTE:
+	    c = '\'';
+	    break;
+	case R_ST_DQUOTE:
+	    c = '"';
+	    break;
+	case R_ST_AMP:
+	    c = ';';
+	    break;
+	default:
+	    return tmp;
+	}
+	next_status(c, &status);
+	Strcat_char(tmp, c);
+    }
+    return tmp;
+}
+
+/* authentication */
+struct auth_cookie *
+find_auth(char *host, char *realm)
+{
+    struct auth_cookie *p;
+
+    for (p = Auth_cookie; p != NULL; p = p->next) {
+	if (!Strcasecmp_charp(p->host, host) &&
+	    !Strcasecmp_charp(p->realm, realm))
+	    return p;
+    }
+    return NULL;
+}
+
+Str
+find_auth_cookie(char *host, char *realm)
+{
+    struct auth_cookie *p = find_auth(host, realm);
+    if (p)
+	return p->cookie;
+    return NULL;
+}
+
+void
+add_auth_cookie(char *host, char *realm, Str cookie)
+{
+    struct auth_cookie *p;
+
+    p = find_auth(host, realm);
+    if (p) {
+	p->cookie = cookie;
+	return;
+    }
+    p = New(struct auth_cookie);
+    p->host = Strnew_charp(host);
+    p->realm = Strnew_charp(realm);
+    p->cookie = cookie;
+    p->next = Auth_cookie;
+    Auth_cookie = p;
+}
+
+/* get last modified time */
+char *
+last_modified(Buffer * buf)
+{
+    TextListItem *ti;
+    struct stat st;
+
+    if (buf->document_header) {
+	for (ti = buf->document_header->first; ti; ti = ti->next) {
+	    if (strncasecmp(ti->ptr, "Last-modified: ", 15) == 0) {
+		return ti->ptr + 15;
+	    }
+	}
+	return "unknown";
+    }
+    else if (buf->currentURL.scheme == SCM_LOCAL) {
+	if (stat(buf->currentURL.file, &st) < 0)
+	    return "unknown";
+	return ctime(&st.st_mtime);
+    }
+    return "unknown";
+}
+
+static char roman_num1[] =
+{
+    'i', 'x', 'c', 'm', '*',
+};
+static char roman_num5[] =
+{
+    'v', 'l', 'd', '*',
+};
+
+static Str
+romanNum2(int l, int n)
+{
+    Str s = Strnew();
+
+    switch (n) {
+    case 1:
+    case 2:
+    case 3:
+	for (; n > 0; n--)
+	    Strcat_char(s, roman_num1[l]);
+	break;
+    case 4:
+	Strcat_char(s, roman_num1[l]);
+	Strcat_char(s, roman_num5[l]);
+	break;
+    case 5:
+    case 6:
+    case 7:
+    case 8:
+	Strcat_char(s, roman_num5[l]);
+	for (n -= 5; n > 0; n--)
+	    Strcat_char(s, roman_num1[l]);
+	break;
+    case 9:
+	Strcat_char(s, roman_num1[l]);
+	Strcat_char(s, roman_num1[l + 1]);
+	break;
+    }
+    return s;
+}
+
+Str
+romanNumeral(int n)
+{
+    Str r = Strnew();
+
+    if (n <= 0)
+	return r;
+    if (n >= 4000) {
+	Strcat_charp(r, "**");
+	return r;
+    }
+    Strcat(r, romanNum2(3, n / 1000));
+    Strcat(r, romanNum2(2, (n % 1000) / 100));
+    Strcat(r, romanNum2(1, (n % 100) / 10));
+    Strcat(r, romanNum2(0, n % 10));
+
+    return r;
+}
+
+Str
+romanAlphabet(int n)
+{
+    Str r = Strnew();
+    int l;
+    char buf[14];
+
+    if (n <= 0)
+	return r;
+
+    l = 0;
+    while (n) {
+	buf[l++] = 'a' + (n - 1) % 26;
+	n = (n - 1) / 26;
+    }
+    l--;
+    for (; l >= 0; l--)
+	Strcat_char(r, buf[l]);
+
+    return r;
+}
+
+Str
+quoteShell(char *string)
+{
+    Str str = Strnew();
+
+    while (*string != '\0') {
+	if (!IS_ALNUM(*string) && *string != '_' && *string != '.' &&
+	    *string != ':' && *string != '/')
+	    Strcat_char(str, '\\');
+	Strcat_char(str, *(string++));
+    }
+    return str;
+}
+
+void
+mySystem(char *command, int background)
+{
+#ifdef __EMX__ /* jsawa */
+    if (background){
+	Str cmd = Strnew_charp("start /f ");
+	Strcat_charp(cmd, command);
+	system(cmd->ptr);
+    }else
+	system(command);
+#else
+    Str cmd = Strnew_charp(command);
+    if (background)
+	cmd = Sprintf("(%s) >/dev/null 2>&1 &", cmd->ptr);
+    system(cmd->ptr);
+#endif
+}
+
+char *
+expandName(char *name)
+{
+    Str userName = NULL;
+    char *p;
+    struct passwd *passent, *getpwnam(const char *);
+    Str extpath = Strnew();
+
+    p = name;
+    if (*p == '/' && *(p + 1) == '~' && IS_ALPHA(*(p + 2))) {
+	if (personal_document_root != NULL) {
+	    userName = Strnew();
+	    p += 2;
+	    while (IS_ALNUM(*p) || *p == '_' || *p == '-')
+		Strcat_char(userName, *(p++));
+	    passent = getpwnam(userName->ptr);
+	    if (passent == NULL) {
+		p = name;
+		goto rest;
+	    }
+	    Strcat_charp(extpath, passent->pw_dir);
+	    Strcat_char(extpath, '/');
+	    Strcat_charp(extpath, personal_document_root);
+	    if (Strcmp_charp(extpath, "/") == 0 && *p == '/')
+		p++;
+	}
+    }
+    else
+	p = expandPath(p);
+  rest:
+    Strcat_charp(extpath, p);
+    return extpath->ptr;
+}
+
+static char *tmpf_base[MAX_TMPF_TYPE] =
+{
+    "tmp", "src", "frame", "cache" 
+};
+static unsigned int tmpf_seq[MAX_TMPF_TYPE];
+    
+Str
+tmpfname(int type, char *ext)
+{
+    Str tmpf;
+    tmpf = Sprintf("%s/w3m%s%d-%d%s",
+		   rc_dir,
+		   tmpf_base[type],
+		   (int) getpid(),
+		   tmpf_seq[type]++,
+		   (ext)? ext : ""
+		   );
+    return tmpf;
+}
+
+#ifdef USE_COOKIE
+static char *monthtbl[] =
+{
+    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+};
+
+static int
+get_day(char **s)
+{
+    Str tmp = Strnew();
+    int day;
+    char *ss = *s;
+
+    if (!**s)
+	return -1;
+
+    while (**s && IS_DIGIT(**s))
+	Strcat_char(tmp, *((*s)++));
+
+    day = atoi(tmp->ptr);
+
+    if (day < 1 || day > 31) {
+	*s = ss;
+	return -1;
+    }
+    return day;
+}
+
+static int
+get_month(char **s)
+{
+    Str tmp = Strnew();
+    int mon;
+    char *ss = *s;
+
+    if (!**s)
+	return -1;
+
+    while (**s && IS_DIGIT(**s))
+	Strcat_char(tmp, *((*s)++));
+    if (tmp->length > 0) {
+	mon = atoi(tmp->ptr);
+    }
+    else {
+	while (**s && IS_ALPHA(**s))
+	    Strcat_char(tmp, *((*s)++));
+	for (mon = 1; mon <= 12; mon++) {
+	    if (strncmp(tmp->ptr, monthtbl[mon - 1], 3) == 0)
+		break;
+	}
+    }
+    if (mon < 1 || mon > 12) {
+	*s = ss;
+	return -1;
+    }
+    return mon;
+}
+
+static int
+get_year(char **s)
+{
+    Str tmp = Strnew();
+    int year;
+    char *ss = *s;
+
+    if (!**s)
+	return -1;
+
+    while (**s && IS_DIGIT(**s))
+	Strcat_char(tmp, *((*s)++));
+    if (tmp->length != 2 && tmp->length != 4) {
+	*s = ss;
+	return -1;
+    }
+
+    year = atoi(tmp->ptr);
+    if (tmp->length == 2) {
+	if (year >= 70)
+	    year += 1900;
+	else
+	    year += 2000;
+    }
+    return year;
+}
+
+static int
+get_time(char **s, int *hour, int *min, int *sec)
+{
+    Str tmp = Strnew();
+    char *ss = *s;
+
+    if (!**s)
+	return -1;
+
+    while (**s && IS_DIGIT(**s))
+	Strcat_char(tmp, *((*s)++));
+    if (**s != ':') {
+	*s = ss;
+	return -1;
+    }
+    *hour = atoi(tmp->ptr);
+
+    (*s)++;
+    Strclear(tmp);
+    while (**s && IS_DIGIT(**s))
+	Strcat_char(tmp, *((*s)++));
+    if (**s != ':') {
+	*s = ss;
+	return -1;
+    }
+    *min = atoi(tmp->ptr);
+
+    (*s)++;
+    Strclear(tmp);
+    while (**s && IS_DIGIT(**s))
+	Strcat_char(tmp, *((*s)++));
+    *sec = atoi(tmp->ptr);
+
+    if (*hour < 0 || *hour >= 24 ||
+	*min < 0 || *min >= 60 ||
+	*sec < 0 || *sec >= 60) {
+	*s = ss;
+	return -1;
+    }
+    return 0;
+}
+
+/* RFC 1123 or RFC 850 or ANSI C asctime() format string -> time_t */
+time_t
+mymktime(char *timestr)
+{
+    char *s;
+    int day, mon, year, hour, min, sec;
+
+    if (!(timestr && *timestr))
+	return -1;
+    s = timestr;
+
+#ifdef DEBUG
+    fprintf(stderr, "mktime: %s\n", timestr);
+#endif				/* DEBUG */
+
+    while (*s && IS_ALPHA(*s))
+	s++;
+    while (*s && !IS_ALNUM(*s))
+	s++;
+
+    if (IS_DIGIT(*s)) {
+	/* RFC 1123 or RFC 850 format */
+	if ((day = get_day(&s)) == -1)
+	    return -1;
+
+	while (*s && !IS_ALNUM(*s))
+	    s++;
+	if ((mon = get_month(&s)) == -1)
+	    return -1;
+
+	while (*s && !IS_DIGIT(*s))
+	    s++;
+	if ((year = get_year(&s)) == -1)
+	    return -1;
+
+	while (*s && !IS_DIGIT(*s))
+	    s++;
+	if (!*s) {
+	    hour = 0;
+	    min = 0;
+	    sec = 0;
+	}
+	else if (get_time(&s, &hour, &min, &sec) == -1) {
+	    return -1;
+	}
+    }
+    else {
+	/* ANSI C asctime() format. */
+	while (*s && !IS_ALNUM(*s))
+	    s++;
+	if ((mon = get_month(&s)) == -1)
+	    return -1;
+
+	while (*s && !IS_DIGIT(*s))
+	    s++;
+	if ((day = get_day(&s)) == -1)
+	    return -1;
+
+	while (*s && !IS_DIGIT(*s))
+	    s++;
+	if (get_time(&s, &hour, &min, &sec) == -1)
+	    return -1;
+
+	while (*s && !IS_DIGIT(*s))
+	    s++;
+	if ((year = get_year(&s)) == -1)
+	    return -1;
+    }
+#ifdef DEBUG
+    fprintf(stderr, "year=%d month=%d day=%d hour:min:sec=%d:%d:%d\n",
+	    year, mon, day, hour, min, sec);
+#endif				/* DEBUG */
+
+    mon -= 3;
+    if (mon < 0) {
+	mon += 12;
+	year--;
+    }
+    day += (year - 1968) * 1461 / 4;
+    day += ((((mon * 153) + 2) / 5) - 672);
+    return (time_t) ((day * 60 * 60 * 24) +
+		     (hour * 60 * 60) +
+		     (min * 60) +
+		     sec);
+}
+
+#ifdef INET6
+#include <sys/socket.h>
+#endif				/* INET6 */
+#include <netdb.h>
+char *
+FQDN(char *host)
+{
+    char *p;
+#ifndef INET6
+    struct hostent *entry;
+#else				/* INET6 */
+    int *af;
+#endif				/* INET6 */
+
+    if (host == NULL)
+	return NULL;
+
+    if (strcasecmp(host, "localhost") == 0)
+	return host;
+
+    for (p = host; *p && *p != '.'; p++);
+
+    if (*p == '.')
+	return host;
+
+#ifndef INET6
+    if (!(entry = gethostbyname(host)))
+	return NULL;
+
+    return allocStr(entry->h_name, 0);
+#else				/* INET6 */
+    for (af = ai_family_order_table[DNS_order];; af++) {
+	int error;
+	struct addrinfo hints;
+	struct addrinfo *res, *res0;
+	char *namebuf;
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = *af;
+	hints.ai_socktype = SOCK_STREAM;
+	error = getaddrinfo(host, NULL, &hints, &res0);
+	if (error) {
+	    if (*af == PF_UNSPEC) {
+		/* all done */
+		break;
+	    }
+	    /* try next address family */
+	    continue;
+	}
+	for (res = res0; res != NULL; res = res->ai_next) {
+	    if (res->ai_canonname) {
+		/* found */
+		namebuf = strdup(res->ai_canonname);
+		freeaddrinfo(res0);
+		return namebuf;
+	    }
+	}
+	freeaddrinfo(res0);
+	if (*af == PF_UNSPEC) {
+	    break;
+	}
+    }
+    /* all failed */
+    return NULL;
+#endif				/* INET6 */
+}
+
+#endif				/* USE_COOKIE */