void-packages/utils/xbps-cmpver.c
pancake 7d8701190d Fixes for cmpver..use strrchr and control last char
- should make util-linux work now

--HG--
extra : convert_revision : 3a02003c06ba3b84d2b8df6acef790765a7750f3
2008-10-29 17:51:29 +01:00

85 lines
1.7 KiB
C

/*
* Compare package and version strings
* @ 2008
* Author: pancake <youterm.com>
*/
#include <stdio.h>
#include <string.h>
static int chkchr(const char *ch)
{
if (*ch>='0' && *ch<='9')
return *ch-'0';
if (ch[1]=='\0') {
if (*ch>='a'&&*ch<='z'){
return *ch-'a';
}
}
switch(*ch) {
case 'a': if (ch[1]=='l')
return 0xa;
return -1;
case 'b': return 0xb;
case 'r': return 0xc;
}
return -1;
}
static int ver2int(const char *a0, int *pow, int mpow)
{
int r,ret = 0;
int pos = 0;
const char *a = a0+strlen(a0)-1;
for(*pow=0;a>=a0;a=a-1) {
if (*a=='.') {
*pow=*pow+1;
} else {
r = chkchr(a);
if (r != -1)
ret+=((r+1)*((*pow)+1))<<pos++;
}
if (mpow>0 && *pow > mpow)
break;
}
return ret;
}
int chkver(const char *a0, const char *a1)
{
int p0,p1;
int v0 = ver2int(a0, &p0, 0);
int v1 = ver2int(a1, &p1, p0);
return v1-v0;
}
int chkpkg(const char *a0, const char *b0)
{
char *a = strrchr(a0, '-');
char *b = strrchr(b0, '-');
if (a == NULL || b== NULL) {
fprintf(stderr, "Invalid package names\n");
return 0;
}
return chkver(a+1, b+1);
}
#if UNIT_TEST
printf("1.2 2.2 = %d\n", chkver("1.2", "2.2"));
printf("1.0 10.3 = %d\n", chkver("1.0", "10.3"));
printf("1.0 1.0 = %d\n", chkver("1.0", "1.0"));
printf("1.0 1.2 = %d\n", chkver("1.0", "1.2"));
printf("1.0.1 1.0.2 = %d\n", chkver("1.0.1", "1.0.2"));
printf("1.0beta 1.0rc1 = %d\n", chkver("1.0beta", "1.0rc1"));
#endif
int main(int argc, char **argv)
{
if (argc<3) {
printf("Usage: ./xbps-cmpver [old] [new]\n");
printf(" ./xbpks-cmpver foo-1.2 foo-2.2 # $? = 1\n");
printf(" ./xbpks-cmpver foo-1.2 foo-1.2 # $? = 0\n");
return 1;
}
return (chkpkg(argv[1], argv[2]) > 0)?1:0;
}