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  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.  
  39. int rbug_connection_send_start(struct rbug_connection *con, enum rbug_opcode opcode, uint32_t length);
  40. int rbug_connection_write(struct rbug_connection *con, void *data, uint32_t size);
  41. int 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)                       \
  47. do {                                        \
  48.         from = (from + to - 1) & ~(to - 1); \
  49. } while(0)
  50.  
  51. #define LEN(size)         \
  52. do {                      \
  53.         PAD(__len, size); \
  54.         __len += size;    \
  55. } while(0)
  56.  
  57. #define LEN_ARRAY(size, name)       \
  58. do {                                \
  59.         LEN(4);                     \
  60.         PAD(__len, size);           \
  61.         __len += size * name##_len; \
  62. } while(0)
  63.  
  64. #define WRITE(size, type, name)             \
  65. do {                                        \
  66.         PAD(__pos, size);                   \
  67.         *((type *)(&__data[__pos])) = name; \
  68.         __pos += size;                      \
  69. } while(0)
  70.  
  71. #define WRITE_ARRAY(size, type, name)                    \
  72. do {                                                     \
  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)                      \
  80. do {                                                \
  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)                             \
  89. do {                                                             \
  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.