80 lines
1.5 KiB
C
80 lines
1.5 KiB
C
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/*
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* Compare package and version strings
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*
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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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static int chkchr(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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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 chkver(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 chkpkg(const char *a0, const char *b0)
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{
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char *a = strchr(a0, '-');
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char *b = strchr(b0, '-');
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if (a == NULL || b== NULL) {
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eprintf("Invalid package names\n");
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return 0;
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}
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return chkver(a+1, b+1);
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}
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#if UNIT_TEST
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int main(int argc, char **argv)
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{
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if (argc>2) {
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printf("%s %s = %d\n",
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argv[1], argv[2],
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chkver(argv[1], argv[2]));
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} else {
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printf("1.2 2.2 = %d\n", chkver("1.2", "2.2"));
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printf("1.0 10.3 = %d\n", chkver("1.0", "10.3"));
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printf("1.0 1.0 = %d\n", chkver("1.0", "1.0"));
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printf("1.0 1.2 = %d\n", chkver("1.0", "1.2"));
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printf("1.0.1 1.0.2 = %d\n", chkver("1.0.1", "1.0.2"));
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printf("1.0beta 1.0rc1 = %d\n", chkver("1.0beta", "1.0rc1"));
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}
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}
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#endif
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