1 files changed, 120 insertions, 0 deletions
diff --git a/src/rpmvercmp.c b/src/rpmvercmp.c
new file mode 100644
index 00000000..de4aefe2
--- /dev/null
+++ b/src/rpmvercmp.c
@@ -0,0 +1,120 @@
+/*
+ *  pacman
+ * 
+ *  Copyright (c) 2002 by Judd Vinet <jvinet@zeroflux.org>
+ * 
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
+ *  USA.
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+
+/* this function was taken from rpm 4.0.4 and rewritten */
+
+int rpmvercmp(const char *a, const char *b)
+{
+	char *str1, *str2;
+	char *one, *two;
+	char *rel1 = NULL, *rel2 = NULL;
+	char oldch1, oldch2;
+	int is1num, is2num;
+	int rc;
+
+	if(!strcmp(a,b)) {
+		return(0);
+	}
+
+	str1 = strdup(a);
+	str2 = strdup(b);
+
+	/* 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(*one)) one++;
+		while(*two && !isalnum(*two)) two++;
+
+		str1 = one;
+		str2 = two;
+
+		/* find the next segment for each string */
+		if(isdigit(*str1)) {
+			is1num = 1;
+			while(*str1 && isdigit(*str1)) str1++;
+		} else {
+			is1num = 0;
+			while(*str1 && isalpha(*str1)) str1++;
+		}
+		if(isdigit(*str2)) {
+			is2num = 1;
+			while(*str2 && isdigit(*str2)) str2++;
+		} else {
+			is2num = 0;
+			while(*str2 && isalpha(*str2)) str2++;
+		}
+
+		oldch1 = *str1;
+		*str1 = '\0';
+		oldch2 = *str2;
+		*str2 = '\0';
+
+		/* see if we ran out of segments on one string */
+		if(one == str1 && two != str2) {
+			return(is2num ? -1 : 1);
+		}
+		if(one != str1 && two == str2) {
+			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);
+
+		*str1 = oldch1;
+		*str2 = oldch2;
+		one = str1;
+		two = str2;
+	}
+
+	if((!*one) && (!*two)) {
+		/* compare release numbers */
+		if(rel1 && rel2) return(rpmvercmp(rel1, rel2));
+		return(0);
+	}
+
+	return(*one ? 1 : -1);
+}
+
+/* vim: set ts=2 sw=2 noet: */