libc.obj:

- Formatted by clang-format (WebKit-style).
- Removed unnecessary errno linux. 
- Added KOS error codes. 
- String functions have been replaced with more optimal ones for x86. 
- Changed wrappers for 70 sysfunction.

git-svn-id: svn://kolibrios.org@9765 a494cfbc-eb01-0410-851d-a64ba20cac60

programs/develop/ktcc/trunk/libc.obj/source/string/memchr.c

@@ -1,24 +1,20 @@
-/* memchr( const void *, int, size_t )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#include <string.h>
-
-void * memchr( const void * s, int c, size_t n )
-{
-    const unsigned char * p = ( const unsigned char * ) s;
-
-    while ( n-- )
-    {
-        if ( *p == ( unsigned char ) c )
-        {
-            return ( void * ) p;
-        }
-
-        ++p;
-    }
-
-    return NULL;
+#include <assert.h>
+#include "unconst.h"
+#include <string.h>
+
+void* memchr(const void* s, int c, size_t n)
+{
+    int d0;
+    register void* __res;
+    if (!n)
+        return NULL;
+    __asm__ __volatile__(
+        "repne\n\t"
+        "scasb\n\t"
+        "je 1f\n\t"
+        "movl $1,%0\n"
+        "1:\tdecl %0"
+        : "=D"(__res), "=&c"(d0)
+        : "a"(c), "0"(s), "1"(n));
+    return __res;
 }