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-rw-r--r--lib/libalpm/rpmvercmp.c237
1 files changed, 237 insertions, 0 deletions
diff --git a/lib/libalpm/rpmvercmp.c b/lib/libalpm/rpmvercmp.c
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+++ b/lib/libalpm/rpmvercmp.c
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+/*
+ * rpmvercmp.c
+ *
+ * Copyright (c) 2002-2005 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 "config.h"
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+/* pacman */
+#include "rpmvercmp.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);
+}
+
+#ifndef HAVE_STRVERSCMP
+
+/* GNU's strverscmp() function, taken from glibc 2.3.2 sources
+ */
+
+/* Compare strings while treating digits characters numerically.
+ Copyright (C) 1997, 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Jean-François Bignolles <bignolle@ecoledoc.ibp.fr>, 1997.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* states: S_N: normal, S_I: comparing integral part, S_F: comparing
+ fractionnal parts, S_Z: idem but with leading Zeroes only */
+#define S_N 0x0
+#define S_I 0x4
+#define S_F 0x8
+#define S_Z 0xC
+
+/* result_type: CMP: return diff; LEN: compare using len_diff/diff */
+#define CMP 2
+#define LEN 3
+
+
+/* Compare S1 and S2 as strings holding indices/version numbers,
+ returning less than, equal to or greater than zero if S1 is less than,
+ equal to or greater than S2 (for more info, see the texinfo doc).
+*/
+
+int strverscmp (s1, s2)
+ const char *s1;
+ const char *s2;
+{
+ const unsigned char *p1 = (const unsigned char *) s1;
+ const unsigned char *p2 = (const unsigned char *) s2;
+ unsigned char c1, c2;
+ int state;
+ int diff;
+
+ /* Symbol(s) 0 [1-9] others (padding)
+ Transition (10) 0 (01) d (00) x (11) - */
+ static const unsigned int next_state[] =
+ {
+ /* state x d 0 - */
+ /* S_N */ S_N, S_I, S_Z, S_N,
+ /* S_I */ S_N, S_I, S_I, S_I,
+ /* S_F */ S_N, S_F, S_F, S_F,
+ /* S_Z */ S_N, S_F, S_Z, S_Z
+ };
+
+ static const int result_type[] =
+ {
+ /* state x/x x/d x/0 x/- d/x d/d d/0 d/-
+ 0/x 0/d 0/0 0/- -/x -/d -/0 -/- */
+
+ /* S_N */ CMP, CMP, CMP, CMP, CMP, LEN, CMP, CMP,
+ CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
+ /* S_I */ CMP, -1, -1, CMP, +1, LEN, LEN, CMP,
+ +1, LEN, LEN, CMP, CMP, CMP, CMP, CMP,
+ /* S_F */ CMP, CMP, CMP, CMP, CMP, LEN, CMP, CMP,
+ CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
+ /* S_Z */ CMP, +1, +1, CMP, -1, CMP, CMP, CMP,
+ -1, CMP, CMP, CMP
+ };
+
+ if (p1 == p2)
+ return 0;
+
+ c1 = *p1++;
+ c2 = *p2++;
+ /* Hint: '0' is a digit too. */
+ state = S_N | ((c1 == '0') + (isdigit (c1) != 0));
+
+ while ((diff = c1 - c2) == 0 && c1 != '\0')
+ {
+ state = next_state[state];
+ c1 = *p1++;
+ c2 = *p2++;
+ state |= (c1 == '0') + (isdigit (c1) != 0);
+ }
+
+ state = result_type[state << 2 | (((c2 == '0') + (isdigit (c2) != 0)))];
+
+ switch (state)
+ {
+ case CMP:
+ return diff;
+
+ case LEN:
+ while (isdigit (*p1++))
+ if (!isdigit (*p2++))
+ return 1;
+
+ return isdigit (*p2) ? -1 : diff;
+
+ default:
+ return state;
+ }
+}
+
+#endif
+
+/* vim: set ts=2 sw=2 noet: */
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