67 lines
1.1 KiB
C
67 lines
1.1 KiB
C
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/*
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* Compare package and version strings
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* @ 2008
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* Author: pancake <youterm.com>
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*/
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#include <stdio.h>
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#include <string.h>
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#include <xbps_api.h>
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static int chkchr(const char *ch)
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{
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if (*ch>='0' && *ch<='9')
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return *ch-'0';
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if (ch[1]=='\0') {
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if (*ch>='a'&&*ch<='z'){
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return *ch-'a';
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}
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}
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switch(*ch) {
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case 'a': if (ch[1]=='l')
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return 0xa;
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return -1;
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case 'b': return 0xb;
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case 'r': return 0xc;
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}
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return -1;
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}
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static int ver2int(const char *a0, int *pow, int mpow)
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{
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int r,ret = 0;
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int pos = 0;
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const char *a = a0+strlen(a0)-1;
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for(*pow=0;a>=a0;a=a-1) {
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if (*a=='.') {
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*pow=*pow+1;
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} else {
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r = chkchr(a);
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if (r != -1)
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ret+=((r+1)*((*pow)+1))<<pos++;
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}
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if (mpow>0 && *pow > mpow)
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break;
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}
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return ret;
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}
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int
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xbps_cmpver_versions(const char *a0, const char *a1)
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{
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int p0,p1;
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int v0 = ver2int(a0, &p0, 0);
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int v1 = ver2int(a1, &p1, p0);
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return v1-v0;
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}
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int
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xbps_cmpver_packages(const char *a0, const char *b0)
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{
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char *a = strrchr(a0, '-');
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char *b = strrchr(b0, '-');
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assert(a != NULL || b != NULL);
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return xbps_cmpver_versions(a+1, b+1);
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}
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