Reworking usermode/libc to closer C compliance

[tpg/acess2.git] / Usermode / Libraries / ld-acess.so_src / lib.c

diff --git a/Usermode/Libraries/ld-acess.so_src/lib.c b/Usermode/Libraries/ld-acess.so_src/lib.c
index 28fb467..150ae77 100644 (file)
--- a/Usermode/Libraries/ld-acess.so_src/lib.c
+++ b/Usermode/Libraries/ld-acess.so_src/lib.c
@@ -4,6 +4,7 @@
  By thePowersGang
 */
 #include "common.h"
+#include <stdint.h>
 
 // === CODE ===
 char *strcpy(char *dest, const char *src)
@@ -47,16 +48,54 @@ int strlen(const char *str)
        return len;
 }
 
+int memcmp(const void *p1, const void *p2, int len)
+{
+       const char      *b1 = p1, *b2 = p2;
+       while(len --)
+       {
+               if(b1 != b2)    return b1 - b2;
+       }
+       return 0;
+}
+
 /**
  * \fn int file_exists(char *filename)
  * \brief Checks if a file exists
  */
-int file_exists(char *filename)
+int file_exists(const char *filename)
 {
         int    fd;
-        //fd = open(filename, OPENFLAG_READ);
-        fd = open(filename, 0);
-        if(fd == -1)   return 0;
-        close(fd);
-        return 1;
+       //fd = open(filename, OPENFLAG_READ);
+       fd = open(filename, 0);
+       if(fd == -1)    return 0;
+       close(fd);
+       return 1;
 }
+
+uint64_t __udivdi3(uint64_t Num, uint64_t Den)
+{
+       uint64_t        ret = 0, add = 1;
+
+       // Find what power of two times Den is > Num
+       while( Num >= Den )
+       {
+               Den <<= 1;
+               add <<= 1;
+       }
+
+       // Search backwards
+       while( add > 1 )
+       {
+               add >>= 1;
+               Den >>= 1;
+               // If the numerator is > Den, subtract and add to return value
+               if( Num > Den )
+               {
+                       ret += add;
+                       Num -= Den;
+               }
+       }
+//     if(Rem) *Rem = Num;
+       return ret;
+}
+