Kernel - Fixed vterm corruption at end of buffer

[tpg/acess2.git] / Kernel / lib.c

diff --git a/Kernel/lib.c b/Kernel/lib.c
index 28edc56..c4251a6 100644 (file)
--- a/Kernel/lib.c
+++ b/Kernel/lib.c
@@ -81,6 +81,7 @@ EXPORT(ModUtil_SetIdent);
 EXPORT(UnHex);
 EXPORT(SwapEndian16);
 EXPORT(SwapEndian32);
+EXPORT(memmove);
 
 // === CODE ===
 /**
@@ -948,3 +949,35 @@ Uint32 SwapEndian32(Uint32 Val)
 {
        return ((Val&0xFF)<<24) | ((Val&0xFF00)<<8) | ((Val>>8)&0xFF00) | ((Val>>24)&0xFF);
 }
+
+void *memmove(void *__dest, const void *__src, size_t len)
+{
+       size_t  block_size;
+       char    *dest = __dest;
+       const char      *src = __src;
+       void    *ret = __dest;
+       
+       if( (tVAddr)dest > (tVAddr)src + len )
+               return memcpy(dest, src, len);
+       if( (tVAddr)dest + len < (tVAddr)src )
+               return memcpy(dest, src, len);
+       
+       if( (tVAddr)dest < (tVAddr)src )
+               block_size = (tVAddr)src - (tVAddr)dest;
+       else
+               block_size = (tVAddr)dest - (tVAddr)src;
+       
+       block_size &= ~0xF;
+       
+       while(len >= block_size)
+       {
+               memcpy(dest, src, block_size);
+               len -= block_size;
+               dest += block_size;
+               src += block_size;
+       }
+       memcpy(dest, src, len);
+       return ret;
+       
+}
+