X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=vg_platform.h;h=c7e178b93df5dbb8a891e52e30d09da31bc8c843;hb=8340e9c7406c7292f85266f9f30f4b5ff246dcd3;hp=210192d60e7164fbf6e15ed72940bb74da6b62c6;hpb=167bbf44eec3c76a63a6a14319136a3ee3a3c0ac;p=vg.git

diff --git a/vg_platform.h b/vg_platform.h
index 210192d..c7e178b 100644
--- a/vg_platform.h
+++ b/vg_platform.h
@@ -39,15 +39,70 @@ struct vg_achievement
 #define vg_list_size( A ) (sizeof(A)/sizeof(A[0]))
 #define VG_MUST_USE_RESULT __attribute__((warn_unused_result))
 
-VG_STATIC void vg_strncpy( const char *src, char *dst, u32 len )
+enum strncpy_behaviour{
+   k_strncpy_always_add_null = 0,
+   k_strncpy_allow_cutoff = 1
+};
+
+VG_STATIC u32 vg_strncpy( const char *src, char *dst, u32 len,
+                          enum strncpy_behaviour behaviour )
 {
-   for( u32 i=0; i<len; i++ )
-   {
+   for( u32 i=0; i<len; i++ ){
       dst[i] = src[i];
 
-      if( !src[i] )
-         break;
+      if( !src[i] ) return i;
+
+      if( (behaviour == k_strncpy_always_add_null) && (i == len-1) ){
+         dst[i] = '\0';
+         return i;
+      }
+   }
+
+   return 0;
+}
+
+typedef struct vg_str vg_str;
+struct vg_str{
+   char *buffer;
+   u32 i, len;
+};
+
+VG_STATIC void vg_strnull( vg_str *str, char *buffer, u32 len )
+{
+   str->buffer = buffer;
+   str->i = 0;
+   str->len = len;
+}
+
+VG_STATIC void vg_strcat( vg_str *str, const char *append )
+{
+   for( u32 i=0; str->i < str->len; i++, str->i ++ ){
+      str->buffer[ str->i ] = append[i];
+
+      if( append[i] == '\0' ) return;
+   }
+}
+
+VG_STATIC int vg_strgood( vg_str *str )
+{
+   if( str->i == str->len ){
+      if( str->buffer[str->i -1] == '\0' ) return 1;
+      else return 0;
    }
+   else{
+      str->buffer[ str->i ++ ] = '\0';
+      return 1;
+   }
+}
+
+VG_STATIC u32 vg_strdjb2( const char *str )
+{
+   u32 hash = 5381, c;
+
+   while( (c = *str++) )
+      hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
+
+   return hash;
 }
 
 #include <stdio.h>