diogo/yap-6.3
Archived
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

regexp core-dump (obs from Ryszard Szopa)

Browse Source 
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@2163 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
This commit is contained in:
vsc
2008-03-25 11:54:08 +00:00
parent fa73e89807
commit 84c15fda0b
3 changed files with 35 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
library/regex/regexp.c
View File

@@ -88,12 +88,13 @@ static int regexp(void)
char *buf, *sbuf;
regex_t reg;
int out;
long int nmatch = YAP_IntOfTerm(YAP_ARG7);
size_t nmatch;
regmatch_t *pmatch;
long int tout;
int yap_flags = YAP_IntOfTerm(YAP_ARG5);
int regcomp_flags = REG_EXTENDED;
if ((buf = (char *)YAP_AllocSpaceFromYap(buflen)) == NULL) {
/* early exit */
return(FALSE);
@@ -106,8 +107,15 @@ static int regexp(void)
if (yap_flags & 1)
regcomp_flags |= REG_ICASE;
/* cool, now I have my string in the buffer, let's have some fun */
if (yap_regcomp(&reg,buf, regcomp_flags) != 0)
if (yap_regcomp(&reg,buf, regcomp_flags) != 0) {
YAP_FreeSpaceFromYap(buf);
return(FALSE);
}
if (YAP_IsVarTerm(YAP_ARG7)) {
nmatch = reg.re_nsub;
} else {
nmatch = YAP_IntOfTerm(YAP_ARG7);
}
if ((sbuf = (char *)YAP_AllocSpaceFromYap(sbuflen)) == NULL) {
/* early exit */
yap_regfree(&reg);
@@ -121,36 +129,37 @@ static int regexp(void)
YAP_FreeSpaceFromYap(sbuf);
return(FALSE);
}
pmatch = YAP_AllocSpaceFromYap(sizeof(regmatch_t)*nmatch);
out = yap_regexec(&reg,sbuf,(int)nmatch,pmatch,0);
pmatch = YAP_AllocSpaceFromYap(sizeof(regmatch_t)*(nmatch+1));
out = yap_regexec(&reg,sbuf,nmatch+1,pmatch,0);
if (out == 0) {
/* match succeed, let's fill the match in */
long int i;
YAP_Term TNil = YAP_MkAtomTerm(YAP_LookupAtom("[]"));
YAP_Functor FDiff = YAP_MkFunctor(YAP_LookupAtom("-"),2);
tout = YAP_ARG6;
for (i = 0; i < nmatch; i++) {
tout = TNil;
for (i = nmatch-1; i >= 0; --i) {
int j;
YAP_Term t = TNil;
if (pmatch[i].rm_so == -1) break;
if (yap_flags & 2) {
YAP_Term to[2];
to[0] = YAP_MkIntTerm(pmatch[i].rm_so);
to[1] = YAP_MkIntTerm(pmatch[i].rm_eo);
t = YAP_MkApplTerm(FDiff,2,to);
} else {
for (j = pmatch[i].rm_eo-1; j >= pmatch[i].rm_so; j--) {
t = YAP_MkPairTerm(YAP_MkIntTerm(sbuf[j]),t);
if (pmatch[i].rm_so != -1) {
if (yap_flags & 2) {
YAP_Term to[2];
to[0] = YAP_MkIntTerm(pmatch[i].rm_so);
to[1] = YAP_MkIntTerm(pmatch[i].rm_eo);
t = YAP_MkApplTerm(FDiff,2,to);
} else {
for (j = pmatch[i].rm_eo-1; j >= pmatch[i].rm_so; j--) {
t = YAP_MkPairTerm(YAP_MkIntTerm(sbuf[j]),t);
}
}
tout = YAP_MkPairTerm(t,tout);
}
YAP_Unify(t,YAP_HeadOfTerm(tout));
tout = YAP_TailOfTerm(tout);
}
out = !YAP_Unify(tout, YAP_ARG6);
}
else if (out != REG_NOMATCH) {
return(FALSE);
out = 0;
}
yap_regfree(&reg);
YAP_FreeSpaceFromYap(buf);