X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdlib%2Fqsort.c;h=757cae0f28444a0419a42b823adabc7ddcebda4a;hp=084cd3ca4cf07675cca839812a5e4526283550da;hb=da0f3f353d417fed71f358a48d5d5394145e460d;hpb=f8dfae46eb161173a4460a98075669e810c8bb7b

diff --git a/functions/stdlib/qsort.c b/functions/stdlib/qsort.c
index 084cd3c..757cae0 100644
--- a/functions/stdlib/qsort.c
+++ b/functions/stdlib/qsort.c
@@ -1,5 +1,3 @@
-/* $Id$ */
-
 /* qsort( void *, size_t, size_t, int(*)( const void *, const void * ) )
 
    This file is part of the Public Domain C Library (PDCLib).
@@ -34,21 +32,24 @@ static inline void memswp( char * i, char * j, size_t size )
 #define PREPARE_STACK char * stack[STACKSIZE]; char * * stackptr = stack
 #define PUSH( base, limit ) stackptr[0] = base; stackptr[1] = limit; stackptr += 2
 #define POP( base, limit ) stackptr -= 2; base = stackptr[0]; limit = stackptr[1]
-/* TODO: This is platform-dependent */
-#define STACKSIZE 40
+/* TODO: Stack usage is log2( nmemb ) (minus what T shaves off the worst case).
+         Worst-case nmemb is platform dependent and should probably be 
+         configured through _PDCLIB_config.h.
+*/
+#define STACKSIZE 64
 
 void qsort( void * base, size_t nmemb, size_t size, int (*compar)( const void *, const void * ) )
 {
     char * i;
     char * j;
-    size_t thresh     = T * size;
-    char * base_      = (char *)base;
-    char * limit      = base_ + nmemb * size;
+    _PDCLIB_size_t thresh = T * size;
+    char * base_          = (char *)base;
+    char * limit          = base_ + nmemb * size;
     PREPARE_STACK;
 
     for ( ;; )
     {
-        if ( limit - base_ > thresh ) /* QSort for more than T elements. */
+        if ( (size_t)( limit - base_ ) > thresh ) /* QSort for more than T elements. */
         {
             /* We work from second to last - first will be pivot element. */
             i = base_ + size;
@@ -127,7 +128,7 @@ void qsort( void * base, size_t nmemb, size_t size, int (*compar)( const void *,
 #endif
 
 #ifdef TEST
-#include <_PDCLIB_test.h>
+#include "_PDCLIB_test.h"
 #include <string.h>
 #include <limits.h>
 
@@ -151,7 +152,7 @@ int main( void )
     strcpy( s, presort );
     qsort( s, 1, 1, compare );
     TESTCASE( strcmp( s, presort ) == 0 );
-#if __BSD_VISIBLE
+#if defined(REGTEST) && (__BSD_VISIBLE || __APPLE__)
     puts( "qsort.c: Skipping test #4 for BSD as it goes into endless loop here." );
 #else
     qsort( s, 100, 0, compare );