1/*
2 * Copyright 2009 VMware, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
19 * VMWARE AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25/*
26 * This file is internal to the rbug protocol code, and contains asorted
27 * features needed by the code.
28 */
29
30#ifndef _RBUG_INTERNAL_H_
31#define _RBUG_INTERNAL_H_
32
33#include "rbug_proto.h"
34
35#include "util/u_memory.h"
36#include "util/u_debug.h"
37#include <errno.h>
38
39int rbug_connection_send_start(struct rbug_connection *con, enum rbug_opcode opcode, uint32_t length);
40int rbug_connection_write(struct rbug_connection *con, void *data, uint32_t size);
41int rbug_connection_send_finish(struct rbug_connection *con, uint32_t *c);
42
43/**
44 * Only works with multiples of 2
45 */
46#define PAD(from, to)                       \
47do {                                        \
48	from = (from + to - 1) & ~(to - 1); \
49} while(0)
50
51#define LEN(size)         \
52do {                      \
53	PAD(__len, size); \
54	__len += size;    \
55} while(0)
56
57#define LEN_ARRAY(size, name)       \
58do {                                \
59	LEN(4);                     \
60	PAD(__len, size);           \
61	__len += size * name##_len; \
62} while(0)
63
64#define WRITE(size, type, name)             \
65do {                                        \
66	PAD(__pos, size);                   \
67	*((type *)(&__data[__pos])) = name; \
68	__pos += size;                      \
69} while(0)
70
71#define WRITE_ARRAY(size, type, name)                    \
72do {                                                     \
73	WRITE(4, uint32_t, name##_len);                  \
74	PAD(__pos, size);                                \
75	memcpy(&__data[__pos], name, size * name##_len); \
76	__pos += size * name##_len;                      \
77} while(0)
78
79#define READ(size, type, name)                      \
80do {                                                \
81	PAD(pos, size);                             \
82	pos += size;                                \
83	if (pos > len)                              \
84		break;                              \
85	ret->name = *((type *)(&data[pos - size])); \
86} while(0)
87
88#define READ_ARRAY(size, type, name)                             \
89do {                                                             \
90	READ(4, uint32_t, name##_len);                           \
91	if (pos > len)                                           \
92		break;                                           \
93	PAD(pos, size);                                          \
94	pos += size * ret->name##_len;                           \
95	if (pos > len)                                           \
96		break;                                           \
97	ret->name = (type *)&data[pos - size * ret->name##_len]; \
98} while(0)
99
100#endif
101