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-rw-r--r--regex.c59
1 files changed, 34 insertions, 25 deletions
diff --git a/regex.c b/regex.c
index 04bf302..aefa0a0 100644
--- a/regex.c
+++ b/regex.c
@@ -1,4 +1,4 @@
-/* $Id: regex.c,v 1.7 2002/01/10 04:55:07 ukai Exp $ */
+/* $Id: regex.c,v 1.8 2002/01/10 15:39:21 ukai Exp $ */
/*
* regex: Regular expression pattern match library
*
@@ -66,7 +66,7 @@ static Regex DefaultRegex;
#define CompiledRegex DefaultRegex.re
#define Cstorage DefaultRegex.storage
-static int regmatch(regexchar *, char *, int, char **);
+static int regmatch(regexchar *, char *, char *, int, char **);
static int regmatch1(regexchar *, longchar);
static int matchWhich(longchar *, longchar);
@@ -261,7 +261,7 @@ RegexMatch(Regex *re, char *str, int len, int firstp)
if (str == NULL)
return 0;
- if (len == 0)
+ if (len < 0)
len = strlen(str);
re->position = NULL;
ep = str + len;
@@ -269,7 +269,7 @@ RegexMatch(Regex *re, char *str, int len, int firstp)
lpos = NULL;
re->lposition = NULL;
for (r = re; r != NULL; r = r->alt_regex) {
- switch (regmatch(r->re, p, firstp && (p == str), &lpos)) {
+ switch (regmatch(r->re, p, ep, firstp && (p == str), &lpos)) {
case 1: /* matched */
re->position = p;
if (re->lposition == NULL || re->lposition < lpos)
@@ -341,11 +341,13 @@ struct MatchingContext2 {
#define YIELD(retval,context,lnum) (context)->label = lnum; return (retval); label##lnum:
-static int regmatch_iter(struct MatchingContext1 *, regexchar *, char *, int);
+static int regmatch_iter(struct MatchingContext1 *,
+ regexchar *, char *, char *, int);
static int
regmatch_sub_anytime(struct MatchingContext2 *c, Regex *regex,
- regexchar * pat2, char *str, int iter_limit, int firstp)
+ regexchar * pat2,
+ char *str, char *end_p, int iter_limit, int firstp)
{
switch (c->label) {
case 1:
@@ -364,7 +366,7 @@ regmatch_sub_anytime(struct MatchingContext2 *c, Regex *regex,
c->firstp = firstp;
for (;;) {
c->ctx->label = 0;
- while (regmatch_iter(c->ctx, c->regex->re, c->str, c->firstp)) {
+ while (regmatch_iter(c->ctx, c->regex->re, c->str, end_p, c->firstp)) {
c->n_any = c->ctx->lastpos - c->str;
if (c->n_any <= 0)
continue;
@@ -373,7 +375,7 @@ regmatch_sub_anytime(struct MatchingContext2 *c, Regex *regex,
c->lastpos = c->str + c->n_any;
YIELD(1, c, 1);
}
- else if (regmatch(pat2, c->str + c->n_any,
+ else if (regmatch(pat2, c->str + c->n_any, end_p,
c->firstp, &c->lastpos) == 1) {
YIELD(1, c, 2);
}
@@ -381,8 +383,8 @@ regmatch_sub_anytime(struct MatchingContext2 *c, Regex *regex,
continue;
c->ctx2->label = 0;
while (regmatch_sub_anytime(c->ctx2, regex, pat2,
- c->str + c->n_any, iter_limit - 1,
- c->firstp)) {
+ c->str + c->n_any, end_p,
+ iter_limit - 1, c->firstp)) {
c->lastpos = c->ctx2->lastpos;
YIELD(1, c, 3);
@@ -397,7 +399,7 @@ regmatch_sub_anytime(struct MatchingContext2 *c, Regex *regex,
static int
regmatch_iter(struct MatchingContext1 *c,
- regexchar * re, char *str, int firstp)
+ regexchar * re, char *str, char *end_p, int firstp)
{
switch (c->label) {
case 1:
@@ -418,10 +420,11 @@ regmatch_iter(struct MatchingContext1 *c,
if (RE_MODE(re) == RE_ENDMARK)
return 0;
c->re = re;
- c->end_p = str + strlen(str);
c->firstp = firstp;
c->str = str;
+ c->end_p = end_p;
c->sub_ctx = NULL;
+ c->lastpos = NULL;
while (RE_MODE(c->re) != RE_ENDMARK) {
if (c->re->mode & (RE_ANYTIME | RE_OPT)) {
if (c->re->mode & RE_ANYTIME)
@@ -441,6 +444,7 @@ regmatch_iter(struct MatchingContext1 *c,
c->re->p.sub,
c->re + 1,
c->str + c->n_any,
+ c->end_p,
c->iter_limit,
c->firstp)) {
c->n_any = c->ctx2->lastpos - c->str;
@@ -480,7 +484,7 @@ regmatch_iter(struct MatchingContext1 *c,
c->lastpos = c->str + c->n_any;
YIELD(1, c, 2);
}
- else if (regmatch(c->re + 1, c->str + c->n_any,
+ else if (regmatch(c->re + 1, c->str + c->n_any, c->end_p,
c->firstp, &c->lastpos) == 1) {
YIELD(1, c, 3);
}
@@ -488,8 +492,6 @@ regmatch_iter(struct MatchingContext1 *c,
return 0;
}
/* regexp other than pat*, pat+ and pat? */
- if (c->str >= c->end_p)
- return 0;
switch (RE_MODE(c->re)) {
case RE_BEGIN:
if (!c->firstp)
@@ -497,9 +499,15 @@ regmatch_iter(struct MatchingContext1 *c,
c->re++;
break;
case RE_END:
- c->lastpos = c->str;
- c->re++;
- YIELD((c->str >= c->end_p), c, 4);
+ if (c->str >= c->end_p) {
+ c->lastpos = c->str;
+ c->re++;
+ YIELD(1, c, 4);
+ }
+ else {
+ c->lastpos = NULL;
+ return 0;
+ }
break;
case RE_SUBREGEX:
if (c->sub_ctx == NULL) {
@@ -509,14 +517,14 @@ regmatch_iter(struct MatchingContext1 *c,
for (;;) {
c->sub_ctx->label = 0;
while (regmatch_iter(c->sub_ctx, c->sub_regex->re,
- c->str, c->firstp)) {
+ c->str, c->end_p, c->firstp)) {
if (c->sub_ctx->lastpos != c->str)
c->firstp = 0;
if (RE_MODE(c->re + 1) == RE_ENDMARK) {
c->lastpos = c->sub_ctx->lastpos;
YIELD(1, c, 5);
}
- else if (regmatch(c->re + 1, c->sub_ctx->lastpos,
+ else if (regmatch(c->re + 1, c->sub_ctx->lastpos, c->end_p,
c->firstp, &c->lastpos) == 1) {
YIELD(1, c, 6);
}
@@ -557,14 +565,14 @@ regmatch_iter(struct MatchingContext1 *c,
}
static int
-regmatch(regexchar * re, char *str, int firstp, char **lastpos)
+regmatch(regexchar * re, char *str, char *end_p, int firstp, char **lastpos)
{
struct MatchingContext1 contx;
*lastpos = NULL;
contx.label = 0;
- while (regmatch_iter(&contx, re, str, firstp)) {
+ while (regmatch_iter(&contx, re, str, end_p, firstp)) {
#ifdef REGEX_DEBUG
char *p;
if (verbose) {
@@ -756,14 +764,15 @@ main(int argc, char **argv)
printf("Error on regexp /%s/: %s\n", buf, msg);
exit(1);
}
- if (RegexMatch(re, buf2, 0, 1)) {
- printf("/%s/\t%s\t", buf, buf2);
+ if (RegexMatch(re, buf2, -1, 1)) {
+ printf("/%s/\t\"%s\"\t\"", buf, buf2);
MatchedPosition(re, &fpos, &epos);
while (fpos < epos)
putchar(*(fpos++));
+ putchar('"');
}
else
- printf("/%s/\t%s\tno_match", buf, buf2);
+ printf("/%s/\t\"%s\"\tno_match", buf, buf2);
putchar('\n');
}
/* notreatched */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 14:32:28 +0000