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implement non-stub strverscmp

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patch by Isaac Dunham.
This commit is contained in:
Rich Felker
2013-02-26 01:36:47 -05:00
parent d1eae83a59
commit 4853c1f7f7
1 changed files with 35 additions and 2 deletions
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37
src/string/strverscmp.c
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@ -1,7 +1,40 @@
#define _GNU_SOURCE
#include <ctype.h>
#include <string.h> #include <string.h>
#include <sys/types.h>
int strverscmp(const char *l, const char *r) int strverscmp(const char *l, const char *r)
{ {
/* FIXME */ int haszero=1;
return strcmp(l, r); while (*l==*r) {
if (!*l) return 0;
if (*l=='0') {
if (haszero==1) {
haszero=0;
}
} else if (isdigit(*l)) {
if (haszero==1) {
haszero=2;
}
} else {
haszero=1;
}
l++; r++;
}
if (haszero==1 && (*l=='0' || *r=='0')) {
haszero=0;
}
if ((isdigit(*l) && isdigit(*r) ) && haszero) {
size_t lenl=0, lenr=0;
while (isdigit(l[lenl]) ) lenl++;
while (isdigit(r[lenr]) ) lenr++;
if (lenl==lenr) {
return (*l - *r);
} else {
return (lenl - lenr);
}
} else {
return (*l - *r);
}
} }