From fc2a03c89e88d7c286630070fc014fd9d45147c9 Mon Sep 17 00:00:00 2001
From: Sebastian Harl <sh@tokkee.org>
Date: Wed, 4 Dec 2013 19:32:50 +0100
Subject: [PATCH] utils proto: Added sdb_proto_get_int().
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

This function “recieves” a 32bit integer from a string buffer and converts it
from network to host byte order.
---
 src/include/utils/proto.h |  5 +++++
 src/utils/proto.c         | 21 +++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/src/include/utils/proto.h b/src/include/utils/proto.h
index 8ab2e1e..372e34d 100644
--- a/src/include/utils/proto.h
+++ b/src/include/utils/proto.h
@@ -28,6 +28,8 @@
 #ifndef SDB_UTILS_PROTO_H
 #define SDB_UTILS_PROTO_H 1
 
+#include "utils/strbuf.h"
+
 #include <stdint.h>
 #include <unistd.h>
 
@@ -42,6 +44,9 @@ ssize_t
 sdb_proto_send_msg(int fd, uint32_t code,
 		uint32_t msg_len, const char *msg);
 
+uint32_t
+sdb_proto_get_int(sdb_strbuf_t *buf, size_t offset);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
diff --git a/src/utils/proto.c b/src/utils/proto.c
index d049144..e9e3e6c 100644
--- a/src/utils/proto.c
+++ b/src/utils/proto.c
@@ -31,6 +31,8 @@
 #include <arpa/inet.h>
 #include <errno.h>
 
+#include <limits.h>
+
 #include <string.h>
 #include <unistd.h>
 
@@ -94,5 +96,24 @@ sdb_proto_send_msg(int fd, uint32_t code,
 	return sdb_proto_send(fd, len, buffer);
 } /* sdb_proto_send_msg */
 
+uint32_t
+sdb_proto_get_int(sdb_strbuf_t *buf, size_t offset)
+{
+	const char *data;
+	uint32_t n;
+
+	if (! buf)
+		return UINT32_MAX;
+
+	/* not enough data to read */
+	if (offset + sizeof(uint32_t) < sdb_strbuf_len(buf))
+		return UINT32_MAX;
+
+	data = sdb_strbuf_string(buf);
+	data += offset;
+	memcpy(&n, data, sizeof(n));
+	return ntohl(n);
+} /* sdb_proto_get_int */
+
 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 
-- 
2.30.2