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// Used for "../configure.ac".
#include <ctype.h>
#include <stdlib.h>
static int version_cmp (const char *v1, const char *v2)
{
const char *s1 = v1, *s2 = v2;
while (*s1 && *s2) {
if (isdigit (*s1) && isdigit (*s2)) {
char buf1[10], buf2[10];
int n1 = 0, n2 = 0;
while (isdigit (*s1)) {
if (n1 < 9) buf1[n1++] = *s1;
s1++;
}
while (isdigit (*s2)) {
if (n2 < 9) buf2[n2++] = *s2;
s2++;
}
buf1[n1] = buf2[n2] = 0;
int c = atoi (buf1) - atoi (buf2);
if (c != 0)
return c;
} else {
if (*s1 != *s2)
return *s1 - *s2;
s1++;
s2++;
}
}
return *s1 - *s2;
}
#include <stdio.h>
int main (int argc, char *argv[])
{
printf ("%d, %d, %d %d\n",
version_cmp ("0.1", "0.001"),
version_cmp ("0.1", "0.002"),
version_cmp ("0.1a", "0.1"),
version_cmp ("2.38.0", "2.38.1"));
return 0;
}
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