# HG changeset patch
# User David Demelier <markand@malikania.fr>
# Date 1335982822 -7200
# Node ID 5ed54050ae3106112a30d9848cf88b61ed99a03a
# Parent  09fb5267c906cb0b0614053b72ad70805f694057
Added buf_cut, cut the buffer

diff -r 09fb5267c906 -r 5ed54050ae31 buf.c
--- a/buf.c	Wed Apr 18 21:30:29 2012 +0200
+++ b/buf.c	Wed May 02 20:20:22 2012 +0200
@@ -130,7 +130,9 @@
 int
 buf_putc(struct buf *buf, int c)
 {
-	return buf_printf(buf, "%c", c);
+	char str[2] = { c, '\0' };
+
+	return buf_ncat(buf, str, 1);
 }
 
 /*
@@ -204,6 +206,28 @@
 }
 
 /*
+ * Remove `n' characters from the buffer, a positive value will cut the string
+ * from beginning, negative value will cut from end.
+ */
+
+void
+buf_cut(struct buf *buf, int n)
+{
+	int pos;
+
+	if (n < 0 || (unsigned int)n >= buf->length)
+		return;
+
+	if (n < 0 && buf->length - (-n) > 0)
+		pos = buf->length - (-n);
+	else if ((unsigned int)n < buf->length)
+		pos = n;
+
+	buf->text[pos]	= '\0';
+	buf->length	-= buf->length - pos;
+}
+
+/*
  * Clear the string buffer.
  */
 
diff -r 09fb5267c906 -r 5ed54050ae31 buf.h
--- a/buf.h	Wed Apr 18 21:30:29 2012 +0200
+++ b/buf.h	Wed May 02 20:20:22 2012 +0200
@@ -31,10 +31,6 @@
 
 #ifdef __GNUC__
 #  define _buf_at_printf(i1, i2)	__attribute__ ((format (printf, i1, i2)))
-#    if __GNUC_MINOR__ > 2
-#      pragma GCC diagnostic push
-#      pragma GCC diagnostic warning "-Wformat"
-#    endif
 #else
 #  define _buf_at_printf(i1, i2)
 #endif
@@ -82,15 +78,14 @@
 buf_trim(struct buf *);
 
 void
+buf_cut(struct buf *, int);
+
+void
 buf_clear(struct buf *);
 
 void
 buf_free(struct buf *);
 
-#if defined(__GNUC__) && __GNUC_MINOR__ > 2
-#  pragma GCC diagnostic pop
-#endif
-
 #ifdef __cplusplus
 }
 #endif