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fix dirname to handle input of form "foo/" correctly

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also optimized a bit.
This commit is contained in:
Rich Felker
2012-09-26 00:56:07 -04:00
parent 82dc1e2e78
commit 507faa63cb
1 changed files with 5 additions and 6 deletions
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11
src/misc/dirname.c
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@ -4,12 +4,11 @@
char *dirname(char *s)
{
size_t i;
if (!s || !*s || !strchr(s, '/')) return ".";
if (!s || !*s) return ".";
i = strlen(s)-1;
for (; i&&s[i]=='/'; i--);
for (; i&&s[i-1]!='/'; i--);
for (; i&&s[i-1]=='/'; i--);
if (!i && *s=='/') i++;
s[i] = 0;
for (; s[i]=='/'; i--) if (!i) return "/";
for (; s[i]!='/'; i--) if (!i) return ".";
for (; s[i]=='/'; i--) if (!i) return "/";
s[i+1] = 0;
return s;
}