error limit

[vg.git] / vg_platform.h

diff --git a/vg_platform.h b/vg_platform.h
index 52c26c0933fc67ecabb60b6bb2e5a772b6d50257..b04ce672b9afa8d0803dec16dffb7f5bcbc48c77 100644 (file)
--- a/vg_platform.h
+++ b/vg_platform.h
@@ -39,25 +39,86 @@ struct vg_achievement
 #define vg_list_size( A ) (sizeof(A)/sizeof(A[0]))
 #define VG_MUST_USE_RESULT __attribute__((warn_unused_result))
 
+#include <stdio.h>
+#include <dirent.h>
+#include <string.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <math.h>
+#include <assert.h>
+
 enum strncpy_behaviour{
    k_strncpy_always_add_null = 0,
-   k_strncpy_allow_cutoff = 1
+   k_strncpy_allow_cutoff = 1,
+   k_strncpy_overflow_fatal = 2
 };
 
-VG_STATIC void vg_strncpy( const char *src, char *dst, u32 len,
-                           enum strncpy_behaviour behaviour )
+VG_STATIC void vg_fatal_error( const char *fmt, ... );
+VG_STATIC u32 vg_strncpy( const char *src, char *dst, u32 len,
+                          enum strncpy_behaviour behaviour )
 {
    for( u32 i=0; i<len; i++ ){
       dst[i] = src[i];
 
-      if( !src[i] )
-         break;
+      if( !src[i] ) return i;
+
+      if( i == len-1 ){
+         if( behaviour == k_strncpy_always_add_null ){
+            dst[i] = '\0';
+            return i;
+         }
+         else if( behaviour == k_strncpy_overflow_fatal ){
+            vg_fatal_error( "Strncpy dest exceeded buffer length\n" );
+         }
+      }
+   }
+
+   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->buffer[0] = '\0';
+   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( (behaviour == k_strncpy_always_add_null) && (i == len-1) )
-         dst[i] = '\0';
+      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 return 1;
+}
+
+VG_STATIC char *vg_strch( vg_str *str, char c )
+{
+   char *ptr = NULL;
+   for( u32 i=0; i<str->i; i++ ){
+      if( str->buffer[i] == c )
+         ptr = str->buffer+i;
+   }
+
+   return ptr;
+}
+
 VG_STATIC u32 vg_strdjb2( const char *str )
 {
    u32 hash = 5381, c;
@@ -68,14 +129,6 @@ VG_STATIC u32 vg_strdjb2( const char *str )
    return hash;
 }
 
-#include <stdio.h>
-#include <dirent.h>
-#include <string.h>
-#include <stdarg.h>
-#include <ctype.h>
-#include <math.h>
-#include <assert.h>
-
 #define VG_MIN( A, B ) ((A)<(B)?(A):(B))
 #define VG_MAX( A, B ) ((A)>(B)?(A):(B))
 #endif