Fixed version of locateInStringList() from Matze Braun.
authorRyan C. Gordon <icculus@icculus.org>
Wed, 12 Oct 2005 22:03:28 +0000
changeset 758 d15345ebca8f
parent 757 50e6457e78be
child 759 e4f83afe8969
Fixed version of locateInStringList() from Matze Braun.
CHANGELOG
CREDITS
physfs.c
--- a/CHANGELOG	Tue Sep 20 04:01:36 2005 +0000
+++ b/CHANGELOG	Wed Oct 12 22:03:28 2005 +0000
@@ -2,6 +2,7 @@
  * CHANGELOG.
  */
 
+10122005 - Fixed locateInStringList() in physfs.c (thanks, Matze!).
 09192005 - Make unix mutexes recursive above pthread layer...fixes deadlock on
            MacOS X, for now.
 09182005 - API BREAKAGE: PHYSFS_enumerateFilesCallback() now passes the
--- a/CREDITS	Tue Sep 20 04:01:36 2005 +0000
+++ b/CREDITS	Wed Oct 12 22:03:28 2005 +0000
@@ -84,7 +84,8 @@
 MPW support:
     Chris Taylor
 
-Mingw support:
+Mingw support,
+General bug fixes:
     Matze Braun
 
 Bug fixes:
--- a/physfs.c	Tue Sep 20 04:01:36 2005 +0000
+++ b/physfs.c	Wed Oct 12 22:03:28 2005 +0000
@@ -1459,37 +1459,30 @@
                               char **list,
                               PHYSFS_uint32 *pos)
 {
-    PHYSFS_uint32 hi = *pos - 1;
+    PHYSFS_uint32 len = *pos;
+    PHYSFS_uint32 half_len;
     PHYSFS_uint32 lo = 0;
-    PHYSFS_uint32 i = hi >> 1;
+    PHYSFS_uint32 middle;
     int cmp;
 
-    assert(*pos != 0);  /* this doesn't work with empty lists! */
+    while (len > 0)
+    {
+        half_len = len >> 1;
+        middle = lo + half_len;
+        cmp = strcmp(list[middle], str);
 
-    while (hi != lo)
-    {
-        cmp = strcmp(list[i], str);
         if (cmp == 0)  /* it's in the list already. */
             return(1);
-        else if (cmp < 0)
-        {
-            hi = i;
-            i = lo + ((hi - lo) >> 1);
-        } /* else if */
+        else if (cmp > 0)
+            len = half_len;
         else
         {
-            lo = i + 1;
-            i = lo + ((1 + hi - lo) >> 1);
+            lo = middle + 1;
+            len -= half_len + 1;
         } /* else */
     } /* while */
 
-    /* hi == lo, check it in case it's the match... */
-    cmp = strcmp(list[lo], str);
-    if (cmp == 0)
-        return(1);
-
-    /* not in the list, set insertion point... */
-    *pos = (cmp < 0) ? lo : lo + 1;
+    *pos = lo;
     return(0);
 } /* locateInStringList */
 
@@ -1506,11 +1499,8 @@
      *  alphabetically...
      */
     pos = pecd->size;
-    if (pos > 0)
-    {
-        if (locateInStringList(str, pecd->list, &pos))
-            return;  /* already in the list. */
-    } /* if */
+    if (locateInStringList(str, pecd->list, &pos))
+        return;  /* already in the list. */
 
     ptr = allocator.Realloc(pecd->list, (pecd->size + 2) * sizeof (char *));
     newstr = (char *) allocator.Malloc(strlen(str) + 1);