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Allow expressions like "expr 'ABC' : '^.*$' to work as is done in other

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expr implementations.
This commit is contained in:
J.T. Conklin 1993-10-04 21:58:53 +00:00
parent 20c7f60367
commit 4a13ab7c12
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=539
1 changed files with 3 additions and 9 deletions
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12
bin/expr/expr.y
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@ -495,26 +495,20 @@ struct val *a, *b;
char errbuf[256];
int eval;
struct val *v;
char *newpat;
/* coerce to both arguments to strings */
to_string(a);
to_string(b);
/* patterns are anchored to the beginning of the line */
newpat = malloc (strlen (b->u.s) + 2);
strcpy (newpat, "^");
strcat (newpat, b->u.s);
/* compile regular expression */
if ((eval = regcomp (&rp, newpat, 0)) != 0) {
if ((eval = regcomp (&rp, b->u.s, 0)) != 0) {
regerror (eval, &rp, errbuf, sizeof(errbuf));
errx (2, "%s", errbuf);
}
free (newpat);
/* compare string against pattern */
if (regexec(&rp, a->u.s, 2, rm, 0) == 0) {
/* remember that patterns are anchored to the beginning of the line */
if (regexec(&rp, a->u.s, 2, rm, 0) == 0 && rm[0].rm_so == 0) {
if (rm[1].rm_so >= 0) {
*(a->u.s + rm[1].rm_eo) = '\0';
v = make_str (a->u.s + rm[1].rm_so);