---------------------
PatchSet 10309 
Date: 2007/12/24 14:11:52
Author: adri
Branch: s27_adri
Tag: (none) 
Log:
Implement some basic buffer region referencing. This stuff is (currently)
unreferenced.

Members: 
	libbuf/Makefile.am:1.1.2.3->1.1.2.4 
	libbuf/bufregion.c:1.1->1.1.2.1 
	libbuf/bufregion.h:1.1->1.1.2.1 

Index: squid/libbuf/Makefile.am
===================================================================
RCS file: /cvsroot/squid-sf//squid/libbuf/Attic/Makefile.am,v
retrieving revision 1.1.2.3
retrieving revision 1.1.2.4
diff -u -r1.1.2.3 -r1.1.2.4
--- squid/libbuf/Makefile.am	13 Dec 2007 12:18:22 -0000	1.1.2.3
+++ squid/libbuf/Makefile.am	24 Dec 2007 14:11:53 -0000	1.1.2.4
@@ -1,11 +1,12 @@
 ## Process this file with automake to produce Makefile.in
 #
-#  $Id: Makefile.am,v 1.1.2.3 2007/12/13 12:18:22 adri Exp $
+#  $Id: Makefile.am,v 1.1.2.4 2007/12/24 14:11:53 adri Exp $
 #
 
 libbuf_a_SOURCES = \
 	buf.c \
 	iobuf.c \
+	bufregion.c \
 	str.c \
 	String.c \
 	StringMap.c
@@ -13,6 +14,7 @@
 libbuf_a_LIBADD = \
 	buf.o \
 	iobuf.o \
+	bufregion.o \
 	str.o \
 	String.o \
 	StringMap.o
--- /dev/null	Tue Dec 25 01:22:57 2007
+++ squid/libbuf/bufregion.c	Tue Dec 25 01:22:57 2007
@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "../libcore/varargs.h"
+#include "../libcore/debug.h"
+#include "../libcore/tools.h"
+#include "buf.h"
+#include "bufregion.h"
+
+
+void
+bufregion_init(bufregion_t *br)
+{
+	br->b = NULL;
+	br->offset = br->length = -1;
+}
+
+void
+bufregion_free(bufregion_t *br)
+{
+	br->b = buf_deref(br->b);
+	br->offset = br->length = -1;
+}
+
+void
+bufregion_init_buf(bufregion_t *br, buf_t *b, int offset, int length)
+{
+	assert(offset < buf_len(b));
+	assert(offset + length < buf_len(b));
+	br->b = buf_ref(b);
+	buf_make_immutable(br->b, offset + length);
+	br->offset = offset;
+	br->length = length;
+}
+
+void
+bufregion_init_region(bufregion_t *br, bufregion_t *src, int offset, int length)
+{
+	assert(offset < src->offset + src->length);
+	assert(offset + length < src->offset + src->length);
+	br->b = buf_ref(src->b);
+	br->offset = src->offset + offset;
+	br->length = src->offset + length;
+	buf_make_immutable(br->b, br->offset + br->length);
+}
--- /dev/null	Tue Dec 25 01:22:57 2007
+++ squid/libbuf/bufregion.h	Tue Dec 25 01:22:57 2007
@@ -0,0 +1,27 @@
+#ifndef	__LIBCORE_BUFREGION_H__
+#define	__LIBCORE_BUFREGION_H__
+
+struct _bufregion {
+	buf_t *b;
+	int offset, length;
+};
+
+typedef struct _bufregion bufregion_t;
+
+extern	void bufregion_init(bufregion_t *br);
+extern	void bufregion_free(bufregion_t *br);
+extern	void bufregion_init_buf(bufregion_t *br, buf_t *b, int offset, int length);
+extern	void bufregion_init_region(bufregion_t *br, bufregion_t *src, int offset, int length);
+
+#define	bufRegionLen(br)	( (br).length )
+
+static inline int
+bufRegionGet(bufregion_t *br, int offset)
+{
+	if (offset > br->offset + br->length)
+		return -1;
+	return buf_get_chr(br->b, br->offset + offset);
+}
+
+
+#endif