From 969496f15e1e0359e26c2c6e995ad4ef82720f86 Mon Sep 17 00:00:00 2001
From: Manuel Bentele
Date: Fri, 16 Oct 2020 17:15:49 +0200
Subject: [BUILD] rewrite CMake build system to track changes of source files

This change restructures the source code directories, separates shared
form non-shared application code and adds CMake dependencies. These
dependencies allow the tracking of changes and trigger a rebuild of
those build targets where changed files are involved.

WARNING: Note that the support of the DNBD3_SERVER_AFL build option is
not supported yet. Thus, the option should be never turned on.
---
 src/shared/serialize.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/shared/serialize.c

(limited to 'src/shared/serialize.c')

diff --git a/src/shared/serialize.c b/src/shared/serialize.c
new file mode 100644
index 0000000..648b719
--- /dev/null
+++ b/src/shared/serialize.c
@@ -0,0 +1,83 @@
+#include <dnbd3/shared/serialize.h>
+#include <dnbd3/types.h>
+
+void serializer_reset_read(serialized_buffer_t *buffer, size_t data_len)
+{
+	buffer->buffer_end = buffer->buffer + MIN(MAX_PAYLOAD, data_len);
+	buffer->buffer_pointer = buffer->buffer;
+}
+
+void serializer_reset_write(serialized_buffer_t *buffer)
+{
+	buffer->buffer_end = buffer->buffer + MAX_PAYLOAD;
+	buffer->buffer_pointer = buffer->buffer;
+}
+
+uint8_t serializer_get_uint8(serialized_buffer_t *buffer)
+{
+	if (buffer->buffer_pointer + 1 > buffer->buffer_end) return 0;
+	return (uint8_t)*buffer->buffer_pointer++;
+}
+
+uint16_t serializer_get_uint16(serialized_buffer_t *buffer)
+{
+	uint16_t ret;
+	if (buffer->buffer_pointer + 2 > buffer->buffer_end) return 0;
+	memcpy(&ret, buffer->buffer_pointer, 2);
+	buffer->buffer_pointer += 2;
+	return net_order_16(ret);
+}
+
+uint64_t serializer_get_uint64(serialized_buffer_t *buffer)
+{
+	uint64_t ret;
+	if (buffer->buffer_pointer + 8 > buffer->buffer_end) return 0;
+	memcpy(&ret, buffer->buffer_pointer, 8);
+	buffer->buffer_pointer += 8;
+	return net_order_64(ret);
+}
+
+char *serializer_get_string(serialized_buffer_t *buffer)
+{
+	char *ptr = buffer->buffer_pointer, *start = buffer->buffer_pointer;
+	if (ptr >= buffer->buffer_end) return NULL;
+	while (ptr < buffer->buffer_end && *ptr) ++ptr;
+	if (*ptr) return NULL; // String did not terminate within buffer (possibly corrupted/malicious packet)
+	buffer->buffer_pointer = ptr + 1;
+	return start;
+}
+
+void serializer_put_uint8(serialized_buffer_t *buffer, uint8_t value)
+{
+	if (buffer->buffer_pointer + 1 > buffer->buffer_end) return;
+	*buffer->buffer_pointer++ = (char)value;
+}
+
+void serializer_put_uint16(serialized_buffer_t *buffer, uint16_t value)
+{
+	if (buffer->buffer_pointer + 2 > buffer->buffer_end) return;
+	value = net_order_16(value);
+	memcpy(buffer->buffer_pointer, &value, 2);
+	buffer->buffer_pointer += 2;
+}
+
+void serializer_put_uint64(serialized_buffer_t *buffer, uint64_t value)
+{
+	if (buffer->buffer_pointer + 8 > buffer->buffer_end) return;
+	value = net_order_64(value);
+	memcpy(buffer->buffer_pointer, &value, 8);
+	buffer->buffer_pointer += 8;
+}
+
+void serializer_put_string(serialized_buffer_t *buffer, const char *value)
+{
+	const size_t len = strlen(value) + 1;
+	if (buffer->buffer_pointer + len > buffer->buffer_end) return;
+	memcpy(buffer->buffer_pointer, value, len);
+	buffer->buffer_pointer += len;
+}
+
+uint32_t serializer_get_written_length(serialized_buffer_t *buffer)
+{
+	return (uint32_t)( buffer->buffer_pointer - buffer->buffer );
+}
-- 
cgit v1.2.3-55-g7522