Use strverscmp() from glibc in place of rpmvercmp()

We are linking with glibc now, so use strverscmp() in place of the
rpmvercmp() function in loadermisc.c.

1 files changed, 7 insertions, 103 deletions

diff --git a/loader/loadermisc.c b/loader/loadermisc.c
index a1560078f..03d26bba9 100644
--- a/loader/loadermisc.c
+++ b/loader/loadermisc.c
@@ -86,107 +86,11 @@ int copyFile(char * source, char * dest) {
     return rc;
 }
 
-/* FIXME: when we only depend on glibc, we could use strvercmp instead */
-/* compare alpha and numeric segments of two versions */
-/* return 1: a is newer than b */
-/*        0: a and b are the same version */
-/*       -1: b is newer than a */
-static 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 = alloca(strlen(a) + 1);
-    str2 = 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 && !isalnum(*one)) one++;
-	while (*two && !isalnum(*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 (isdigit(*str1)) {
-	    while (*str1 && isdigit(*str1)) str1++;
-	    while (*str2 && isdigit(*str2)) str2++;
-	    isnum = 1;
-	} else {
-	    while (*str1 && isalpha(*str1)) str1++;
-	    while (*str2 && isalpha(*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 */
-	/* XXX See patch #60884 (and details) from bugzilla #50977. */
-	if (two == str2) return (isnum ? 1 : -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 < 1 ? -1 : 1);
-
-	/* 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 simpleStringCmp(const void * a, const void * b) {
     const char * first = *((const char **) a);
     const char * second = *((const char **) b);
 
-    return rpmvercmp(first, second);
+    return strverscmp(first, second);
 }
 
 /* look for available memory.  note: won't ever report more than the 
@@ -197,23 +101,23 @@ int totalMemory(void) {
     char buf[4096];
     char * chptr, * start;
     int total = 0;
-    
+
     fd = open("/proc/meminfo", O_RDONLY);
     if (fd < 0) {
         logMessage(ERROR, "failed to open /proc/meminfo: %m");
         return 0;
     }
-    
+
     bytesRead = read(fd, buf, sizeof(buf) - 1);
     if (bytesRead < 0) {
         logMessage(ERROR, "failed to read from /proc/meminfo: %m");
         close(fd);
         return 0;
     }
-    
+
     close(fd);
     buf[bytesRead] = '\0';
-    
+
     chptr = buf;
     while (*chptr && !total) {
         if (strncmp(chptr, "MemTotal:", 9)) {
@@ -225,7 +129,7 @@ int totalMemory(void) {
         while (*chptr && *chptr != '\n') chptr++;
 
         *chptr = '\0';
-    
+
         while (!isdigit(*start) && *start) start++;
         if (!*start) {
             logMessage(WARNING, "no number appears after MemTotal tag");
@@ -240,6 +144,6 @@ int totalMemory(void) {
     }
 
     logMessage(INFO, "%d kB are available", total);
-    
+
     return total;
 }