Anonymous

/* this function was taken from rpm 4.0.4 and rewritten */int _alpm_versioncmp(const char *a, const char *b){	char str1[64], str2[64];	char *ptr1, *ptr2;	char *one, *two;	char *rel1 = NULL, *rel2 = NULL;	char oldch1, oldch2;	int is1num, is2num;	int rc;	ALPM_LOG_FUNC;	if(!strcmp(a,b)) {		return(0);	}	strncpy(str1, a, 64);	str1[63] = 0;	strncpy(str2, b, 64);	str2[63] = 0;	/* lose the release number */	for(one = str1; *one && *one != '-'; one++);	if(one) {		*one = '\0';		rel1 = ++one;	}	for(two = str2; *two && *two != '-'; two++);	if(two) {		*two = '\0';		rel2 = ++two;	}	one = str1;	two = str2;	while(*one || *two) {		while(*one && !isalnum((int)*one)) one++;		while(*two && !isalnum((int)*two)) two++;		ptr1 = one;		ptr2 = two;		/* find the next segment for each string */		if(isdigit((int)*ptr1)) {			is1num = 1;			while(*ptr1 && isdigit((int)*ptr1)) ptr1++;		} else {			is1num = 0;			while(*ptr1 && isalpha((int)*ptr1)) ptr1++;		}		if(isdigit((int)*ptr2)) {			is2num = 1;			while(*ptr2 && isdigit((int)*ptr2)) ptr2++;		} else {			is2num = 0;			while(*ptr2 && isalpha((int)*ptr2)) ptr2++;		}		oldch1 = *ptr1;		*ptr1 = '\0';		oldch2 = *ptr2;		*ptr2 = '\0';		/* see if we ran out of segments on one string */		if(one == ptr1 && two != ptr2) {			return(is2num ? -1 : 1);		}		if(one != ptr1 && two == ptr2) {			return(is1num ? 1 : -1);		}		/* see if we have a type mismatch (ie, one is alpha and one is digits) */		if(is1num && !is2num) return(1);		if(!is1num && is2num) return(-1);		if(is1num) while(*one == '0') one++;		if(is2num) while(*two == '0') two++;		rc = strverscmp(one, two);		if(rc) return(rc);		*ptr1 = oldch1;		*ptr2 = oldch2;		one = ptr1;		two = ptr2;	}	if((!*one) && (!*two)) {		/* compare release numbers */		if(rel1 && rel2 && strlen(rel1) && strlen(rel2)) return(_alpm_versioncmp(rel1, rel2));		return(0);	}	return(*one ? 1 : -1);}