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authorMichael Vogt <michael.vogt@ubuntu.com>2011-11-10 16:32:52 +0100
committerMichael Vogt <michael.vogt@ubuntu.com>2011-11-10 16:32:52 +0100
commit71ecaad29d8066a494f516efc5efd80860653fe2 (patch)
treeb0769df88e2b6496f23e3d899aeb1c240a3488d9 /test/interactive-helper/rpmver.cc
parenta865ed25fa54514224cf4d6f83dd9cf48b7ed02b (diff)
parent37adedc9d0b66eeae7efb88aebd08dfbc6e06f77 (diff)
merged from http://bzr.debian.org/bzr/apt/apt/debian-experimental2
Diffstat (limited to 'test/interactive-helper/rpmver.cc')
-rw-r--r--test/interactive-helper/rpmver.cc117
1 files changed, 117 insertions, 0 deletions
diff --git a/test/interactive-helper/rpmver.cc b/test/interactive-helper/rpmver.cc
new file mode 100644
index 000000000..9fc807de8
--- /dev/null
+++ b/test/interactive-helper/rpmver.cc
@@ -0,0 +1,117 @@
+#include <apt-pkg/debversion.h>
+#include <rpm/rpmio.h>
+#include <rpm/misc.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#define xisdigit(x) isdigit(x)
+#define xisalpha(x) isalpha(x)
+#define xisalnum(x) (isdigit(x) || isalpha(x))
+
+using namespace std;
+
+int rpmvercmp(const char * a, const char * b)
+{
+ char oldch1, oldch2;
+ char * str1, * str2;
+ char * one, * two;
+ int rc;
+ int isnum;
+
+ /* easy comparison to see if versions are identical */
+ if (!strcmp(a, b)) return 0;
+
+ str1 = (char *)alloca(strlen(a) + 1);
+ str2 = (char *)alloca(strlen(b) + 1);
+
+ strcpy(str1, a);
+ strcpy(str2, b);
+
+ one = str1;
+ two = str2;
+
+ /* loop through each version segment of str1 and str2 and compare them */
+ while (*one && *two) {
+ while (*one && !xisalnum(*one)) one++;
+ while (*two && !xisalnum(*two)) two++;
+
+ str1 = one;
+ str2 = two;
+
+ /* grab first completely alpha or completely numeric segment */
+ /* leave one and two pointing to the start of the alpha or numeric */
+ /* segment and walk str1 and str2 to end of segment */
+ if (xisdigit(*str1)) {
+ while (*str1 && xisdigit(*str1)) str1++;
+ while (*str2 && xisdigit(*str2)) str2++;
+ isnum = 1;
+ } else {
+ while (*str1 && xisalpha(*str1)) str1++;
+ while (*str2 && xisalpha(*str2)) str2++;
+ isnum = 0;
+ }
+
+ /* save character at the end of the alpha or numeric segment */
+ /* so that they can be restored after the comparison */
+ oldch1 = *str1;
+ *str1 = '\0';
+ oldch2 = *str2;
+ *str2 = '\0';
+
+ /* take care of the case where the two version segments are */
+ /* different types: one numeric, the other alpha (i.e. empty) */
+ if (one == str1) return -1; /* arbitrary */
+ if (two == str2) return 1;
+
+ if (isnum) {
+ /* this used to be done by converting the digit segments */
+ /* to ints using atoi() - it's changed because long */
+ /* digit segments can overflow an int - this should fix that. */
+
+ /* throw away any leading zeros - it's a number, right? */
+ while (*one == '0') one++;
+ while (*two == '0') two++;
+
+ /* whichever number has more digits wins */
+ if (strlen(one) > strlen(two)) return 1;
+ if (strlen(two) > strlen(one)) return -1;
+ }
+
+ /* strcmp will return which one is greater - even if the two */
+ /* segments are alpha or if they are numeric. don't return */
+ /* if they are equal because there might be more segments to */
+ /* compare */
+ rc = strcmp(one, two);
+ if (rc) return rc;
+
+ /* restore character that was replaced by null above */
+ *str1 = oldch1;
+ one = str1;
+ *str2 = oldch2;
+ two = str2;
+ }
+
+ /* this catches the case where all numeric and alpha segments have */
+ /* compared identically but the segment sepparating characters were */
+ /* different */
+ if ((!*one) && (!*two)) return 0;
+
+ /* whichever version still has characters left over wins */
+ if (!*one) return -1; else return 1;
+}
+
+int main(int argc,const char *argv[])
+{
+ printf("%i\n",strcmp(argv[1],argv[2]));
+
+ printf("'%s' <> '%s': ",argv[1],argv[2]);
+ printf("rpm: %i deb: %i\n",rpmvercmp(argv[1],argv[2]),
+ debVS.CmpFragment(argv[1],argv[1]+strlen(argv[1]),
+ argv[2],argv[2]+strlen(argv[2])));
+
+ printf("'%s' <> '%s': ",argv[2],argv[1]);
+ printf("rpm: %i deb: %i\n",rpmvercmp(argv[2],argv[1]),
+ debVS.CmpFragment(argv[2],argv[2]+strlen(argv[2]),
+ argv[1],argv[1]+strlen(argv[1])));
+ return 0;
+}