Minor code tweaks

darcs-hash:20070416201053-ac50b-99d3ee51ef2b3642c737c3809bc2a4bfbe103b67.gz

1 files changed, 20 insertions, 4 deletions

diff --git a/util.c b/util.c
index e1832730..0da829d0 100644
--- a/util.c
+++ b/util.c
@@ -1316,15 +1316,31 @@ void sb_destroy( string_buffer_t * b )
 
 void sb_clear( string_buffer_t * b )
 {
-	wchar_t c=0;
+	sb_truncate( b, 0 );
+	assert( !wcslen( b->buff) );
+}
 
+void sb_truncate( string_buffer_t *b, int chars_left )
+{
+	wchar_t *arr;
+	
 	CHECK( b, );
+
+	b->used = (chars_left)*sizeof( wchar_t);
+	arr = (wchar_t *)b->buff;
+	arr[chars_left] = 0;
 	
-	b->used=0;
-	b_append( b, &c, sizeof( wchar_t));
-	b->used -= sizeof(wchar_t);
 }
 
+ssize_t sb_length( string_buffer_t *b )
+{
+	CHECK( b, -1 );
+	return (b->used-1)/sizeof( wchar_t);
+	
+}
+
+
+
 
 void b_init( buffer_t *b)
 {