Sat, 22 Mar 2014 00:42:07 +0100
Update libgadu to the current version from repo
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1 | /* $Id$ */ |
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2 | |
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3 | /* |
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4 | * (C) Copyright 2012 Tomek Wasilczyk <www.wasilczyk.pl> |
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5 | * |
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6 | * This program is free software; you can redistribute it and/or modify |
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7 | * it under the terms of the GNU Lesser General Public License Version |
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8 | * 2.1 as published by the Free Software Foundation. |
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9 | * |
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10 | * This program is distributed in the hope that it will be useful, |
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | * GNU Lesser General Public License for more details. |
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14 | * |
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15 | * You should have received a copy of the GNU Lesser General Public |
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16 | * License along with this program; if not, write to the Free Software |
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17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, |
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18 | * USA. |
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19 | */ |
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20 | |
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21 | /** |
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22 | * \file tvbuilder.c |
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23 | * |
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24 | * \brief Bufor wspierający budowanie pakietów typu Type-Value(s) |
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25 | */ |
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26 | |
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27 | #include <stdlib.h> |
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28 | #include <string.h> |
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29 | |
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30 | #include "tvbuilder.h" |
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31 | |
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32 | #include "internal.h" |
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33 | #include "fileio.h" |
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34 | |
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35 | #include <errno.h> |
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36 | |
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37 | struct gg_tvbuilder |
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38 | { |
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39 | char *buffer; |
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40 | size_t length; |
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41 | size_t alloc_length; |
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42 | int valid; |
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43 | |
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44 | struct gg_session *gs; |
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45 | struct gg_event *ge; |
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46 | }; |
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47 | |
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48 | static char *gg_tvbuilder_extend(gg_tvbuilder_t *tvb, size_t length); |
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49 | |
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50 | /** |
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51 | * \internal Tworzy nową instancję bufora. |
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52 | * |
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53 | * \param gs Struktura sesji |
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54 | * \param ge Struktura zdarzenia |
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55 | * |
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56 | * \return Zaalokowany bufor - musi być zwolniony przez gg_tvbuilder_free, |
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57 | * gg_tvbuilder_fail lub gg_tvbuilder_send. |
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58 | */ |
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59 | gg_tvbuilder_t *gg_tvbuilder_new(struct gg_session *gs, struct gg_event *ge) |
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60 | { |
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61 | gg_tvbuilder_t *tvb; |
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62 | |
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63 | tvb = malloc(sizeof(gg_tvbuilder_t)); |
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64 | if (tvb == NULL) |
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65 | return NULL; |
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66 | memset(tvb, 0, sizeof(gg_tvbuilder_t)); |
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67 | |
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68 | if (gs == NULL) { |
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69 | gg_debug(GG_DEBUG_ERROR, "// gg_tvbuilder_new() " |
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70 | "invalid arguments\n"); |
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71 | tvb->valid = 0; |
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72 | return tvb; |
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73 | } |
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74 | |
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75 | tvb->buffer = NULL; |
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76 | tvb->length = 0; |
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77 | tvb->alloc_length = 0; |
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78 | tvb->valid = 1; |
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79 | |
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80 | tvb->gs = gs; |
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81 | tvb->ge = ge; |
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82 | |
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83 | return tvb; |
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84 | } |
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85 | |
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86 | /** |
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87 | * \internal Zwalnia bufor. |
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88 | * |
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89 | * \param tvb Bufor |
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90 | */ |
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91 | void gg_tvbuilder_free(gg_tvbuilder_t *tvb) |
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92 | { |
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93 | if (tvb == NULL) |
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94 | return; |
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95 | |
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96 | free(tvb->buffer); |
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97 | free(tvb); |
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98 | } |
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99 | |
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100 | /** |
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101 | * \internal Zwalnia bufor i generuje błąd połączenia. |
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102 | * |
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103 | * \param tvb Bufor |
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104 | * \param failure Powód błędu |
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105 | */ |
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106 | void gg_tvbuilder_fail(gg_tvbuilder_t *tvb, enum gg_failure_t failure) |
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107 | { |
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108 | int errno_copy; |
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109 | |
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110 | if (tvb == NULL) { |
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111 | gg_debug(GG_DEBUG_WARNING, "// gg_tvbuilder_fail() " |
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112 | "NULL tvbuilder\n"); |
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113 | return; |
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114 | } |
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115 | |
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116 | errno_copy = errno; |
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117 | close(tvb->gs->fd); |
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118 | tvb->gs->fd = -1; |
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119 | errno = errno_copy; |
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120 | |
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121 | if (tvb->ge) { |
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122 | tvb->ge->type = GG_EVENT_CONN_FAILED; |
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123 | tvb->ge->event.failure = failure; |
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124 | } |
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125 | tvb->gs->state = GG_STATE_IDLE; |
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126 | |
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127 | gg_tvbuilder_free(tvb); |
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128 | } |
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129 | |
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130 | /** |
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131 | * \internal Próbuje wysłać zawartość bufora i go zwalnia. |
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132 | * |
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133 | * \param tvb Bufor |
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134 | * \param type Typ pakietu |
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135 | * |
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136 | * \return 1 jeśli się powiodło, 0 w p.p. |
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137 | */ |
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138 | int gg_tvbuilder_send(gg_tvbuilder_t *tvb, int type) |
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139 | { |
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140 | int ret; |
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141 | enum gg_failure_t failure; |
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142 | |
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143 | if (tvb == NULL) { |
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144 | gg_debug(GG_DEBUG_WARNING, "// gg_tvbuilder_send() " |
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145 | "NULL tvbuilder\n"); |
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146 | return 0; |
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147 | } |
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148 | |
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149 | if (!gg_tvbuilder_is_valid(tvb)) { |
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150 | gg_debug_session(tvb->gs, GG_DEBUG_ERROR, "// gg_tvbuilder_send() " |
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151 | "invalid buffer\n"); |
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152 | ret = -1; |
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153 | failure = GG_FAILURE_INTERNAL; |
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154 | } else { |
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155 | const char *buffer = (tvb->length > 0) ? tvb->buffer : ""; |
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156 | ret = gg_send_packet(tvb->gs, type, buffer, tvb->length, NULL); |
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157 | if (ret == -1) { |
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158 | failure = GG_FAILURE_WRITING; |
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159 | gg_debug_session(tvb->gs, GG_DEBUG_ERROR, |
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160 | "// gg_tvbuilder_send() " |
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161 | "sending packet %#x failed. (errno=%d, %s)\n", |
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162 | type, errno, strerror(errno)); |
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163 | } |
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164 | } |
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165 | |
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166 | if (ret == -1) { |
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167 | gg_tvbuilder_fail(tvb, failure); |
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168 | return 0; |
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169 | } |
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170 | |
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171 | gg_tvbuilder_free(tvb); |
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172 | return 1; |
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173 | } |
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174 | |
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175 | /** |
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176 | * \internal Sprawdza, czy wszystkie zapisy do bufora były prawidłowe. |
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177 | * |
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178 | * \param tvb Builder. |
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179 | * |
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180 | * \return Wartość różna od 0, jeżeli wszystkie zapisy były prawidłowe. |
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181 | */ |
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182 | int gg_tvbuilder_is_valid(const gg_tvbuilder_t *tvb) |
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183 | { |
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184 | if (tvb == NULL) |
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185 | return 0; |
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186 | return tvb->valid; |
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187 | } |
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188 | |
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189 | /** |
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190 | * \internal Sprawdza rozmiar bufora. |
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191 | * |
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192 | * \param tvb Bufor |
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193 | * |
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194 | * \return Rozmiar bufora |
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195 | */ |
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196 | size_t gg_tvbuilder_get_size(const gg_tvbuilder_t *tvb) |
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197 | { |
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198 | if (!gg_tvbuilder_is_valid(tvb)) |
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199 | return 0; |
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200 | |
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201 | return tvb->length; |
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202 | } |
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203 | |
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204 | /** |
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205 | * \internal Określa oczekiwaną liczbę bajtów, o którą zostanie rozszerzony |
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206 | * bufor. |
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207 | * |
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208 | * Funkcja powoduje jedynie wzrost wydajności poprzez zmniejszenie ilości |
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209 | * realokacji. |
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210 | * |
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211 | * \param tvb Builder. |
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212 | * \param length Oczekiwana liczba bajtów. |
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213 | */ |
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214 | void gg_tvbuilder_expected_size(gg_tvbuilder_t *tvb, size_t length) |
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215 | { |
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216 | size_t length_new; |
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217 | char *buff_new; |
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218 | |
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219 | if (!gg_tvbuilder_is_valid(tvb) || length == 0) |
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220 | return; |
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221 | |
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222 | length_new = tvb->length + length; |
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223 | |
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224 | if (length_new <= tvb->alloc_length) |
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225 | return; |
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226 | |
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227 | if (tvb->alloc_length > 0) { |
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228 | gg_debug(GG_DEBUG_MISC, "// gg_tvbuilder_expected_size(%p, %" |
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229 | GG_SIZE_FMT ") realloc from %" GG_SIZE_FMT " to %" |
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230 | GG_SIZE_FMT "\n", |
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231 | tvb, length, tvb->alloc_length, length_new); |
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232 | } |
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233 | |
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234 | buff_new = realloc(tvb->buffer, length_new); |
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235 | if (buff_new != NULL) { |
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236 | tvb->buffer = buff_new; |
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237 | tvb->alloc_length = length_new; |
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238 | return; |
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239 | } |
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240 | |
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241 | gg_debug(GG_DEBUG_ERROR, "// gg_tvbuilder_expected_size(%p, %" |
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242 | GG_SIZE_FMT ") out of memory (new length: %" GG_SIZE_FMT |
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243 | ")\n", tvb, length, length_new); |
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244 | free(tvb->buffer); |
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245 | tvb->buffer = NULL; |
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246 | tvb->length = 0; |
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247 | tvb->alloc_length = 0; |
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248 | tvb->valid = 0; |
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249 | } |
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250 | |
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251 | /** |
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252 | * \internal Poszerza bufor o podaną liczbę bajtów. |
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253 | * |
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254 | * \param tvb Bufor |
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255 | * \param length Liczba bajtów do dodania |
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256 | * |
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257 | * \return Początek nowo dodanego bloku bufora |
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258 | */ |
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259 | static char * gg_tvbuilder_extend(gg_tvbuilder_t *tvb, size_t length) |
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260 | { |
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261 | size_t length_old; |
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262 | |
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263 | gg_tvbuilder_expected_size(tvb, length); |
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264 | if (!gg_tvbuilder_is_valid(tvb)) |
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265 | return NULL; |
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266 | |
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267 | length_old = tvb->length; |
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268 | tvb->length += length; |
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269 | |
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270 | return tvb->buffer + length_old; |
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271 | } |
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272 | |
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273 | /** |
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274 | * \internal Skraca bufor o podaną liczbę bajtów |
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275 | * |
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276 | * \param tvb Bufor |
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277 | * \param length Ilość bajtów do skrócenia |
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278 | */ |
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279 | void gg_tvbuilder_strip(gg_tvbuilder_t *tvb, size_t length) |
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280 | { |
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281 | if (!gg_tvbuilder_is_valid(tvb)) |
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282 | return; |
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283 | |
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284 | if (length > tvb->length) { |
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285 | gg_debug(GG_DEBUG_WARNING, "// gg_tvbuilder_strip() " |
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286 | "out of range\n"); |
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287 | tvb->valid = 0; |
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288 | return; |
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289 | } |
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290 | |
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291 | tvb->length = length; |
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292 | } |
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293 | |
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294 | /** |
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295 | * \internal Zapisuje do bufora liczbę 8-bitową. |
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296 | * |
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297 | * \param tvb Bufor |
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298 | * \param value Wartość do zapisania |
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299 | */ |
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300 | void gg_tvbuilder_write_uint8(gg_tvbuilder_t *tvb, uint8_t value) |
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301 | { |
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302 | gg_tvbuilder_write_buff(tvb, (const char *)&value, 1); |
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303 | } |
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304 | |
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305 | /** |
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306 | * \internal Zapisuje do bufora liczbę 32-bitową. |
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307 | * |
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308 | * \param tvb Bufor |
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309 | * \param value Wartość do zapisania |
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310 | */ |
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311 | void gg_tvbuilder_write_uint32(gg_tvbuilder_t *tvb, uint32_t value) |
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312 | { |
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313 | value = gg_fix32(value); |
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314 | gg_tvbuilder_write_buff(tvb, (const char *)&value, 4); |
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315 | } |
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316 | |
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317 | /** |
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318 | * \internal Zapisuje do bufora liczbę 64-bitową. |
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319 | * |
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320 | * \param tvb Bufor |
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321 | * \param value Wartość do zapisania |
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322 | */ |
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323 | void gg_tvbuilder_write_uint64(gg_tvbuilder_t *tvb, uint64_t value) |
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324 | { |
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325 | value = gg_fix64(value); |
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326 | gg_tvbuilder_write_buff(tvb, (const char *)&value, 8); |
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327 | } |
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328 | |
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329 | /** |
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330 | * \internal Zapisuje do bufora liczbę 1-9 bajtową. |
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331 | * |
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332 | * \param tvb Bufor |
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333 | * \param value Wartość do zapisania |
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334 | * |
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335 | * \see gg_tvbuff_read_packed_uint |
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336 | */ |
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337 | void gg_tvbuilder_write_packed_uint(gg_tvbuilder_t *tvb, uint64_t value) |
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338 | { |
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339 | uint8_t buff[9]; |
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340 | uint64_t val_curr; |
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341 | int i, val_len = 0; |
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342 | |
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343 | if (!gg_tvbuilder_is_valid(tvb)) |
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344 | return; |
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345 | |
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346 | val_curr = value; |
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347 | while (val_curr > 0) { |
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348 | val_curr >>= 7; |
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349 | val_len++; |
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350 | } |
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351 | if (val_len == 0) |
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352 | val_len = 1; |
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353 | |
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354 | if (val_len > 9) { |
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355 | gg_debug(GG_DEBUG_WARNING, "// gg_tvbuilder_write_packed_uint() " |
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35627
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356 | "int size too big (%d): %" PRIu64 "\n", val_len, value); |
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35617
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357 | tvb->valid = 0; |
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358 | return; |
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359 | } |
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360 | |
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361 | val_curr = value; |
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362 | for (i = 0; i < val_len; i++) { |
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363 | uint8_t raw = val_curr & 0x7F; |
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364 | val_curr >>= 7; |
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365 | if (i + 1 < val_len) |
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366 | raw |= 0x80; |
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367 | buff[i] = raw; |
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368 | } |
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369 | |
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370 | gg_tvbuilder_write_buff(tvb, (const char*)buff, val_len); |
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371 | } |
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372 | |
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373 | /** |
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374 | * \internal Zapisuje do bufora zawartość innego bufora. |
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375 | * |
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376 | * \param tvb Bufor docelowy |
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377 | * \param buffer Bufor źródłowy |
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378 | * \param length Ilość danych do skopiowania |
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379 | */ |
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380 | void gg_tvbuilder_write_buff(gg_tvbuilder_t *tvb, const char *buffer, |
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381 | size_t length) |
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382 | { |
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383 | char *buff = gg_tvbuilder_extend(tvb, length); |
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384 | if (!buff) |
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385 | return; |
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386 | |
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387 | memcpy(buff, buffer, length); |
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388 | } |
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389 | |
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390 | /** |
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391 | * \internal Zapisuje do bufora ciąg tekstowy (mogący zawierać znaki \0). |
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392 | * |
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393 | * \param tvb Bufor docelowy |
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394 | * \param buffer Bufor źródłowy |
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395 | * \param length Długość tekstu, lub -1, jeżeli ma zostać wyliczona |
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396 | * automatycznie (do pierwszego znaku \0) |
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397 | */ |
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398 | void gg_tvbuilder_write_str(gg_tvbuilder_t *tvb, const char *buffer, |
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399 | ssize_t length) |
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400 | { |
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401 | if (!gg_tvbuilder_is_valid(tvb)) |
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402 | return; |
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403 | |
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404 | if (length == -1) |
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405 | length = strlen(buffer); |
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406 | |
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407 | gg_tvbuilder_write_packed_uint(tvb, length); |
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408 | gg_tvbuilder_write_buff(tvb, buffer, length); |
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409 | } |
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410 | |
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411 | /** |
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412 | * \internal Zapisuje do bufora identyfikator użytkownika. |
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413 | * |
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414 | * \param tvb Bufor |
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415 | * \param uin Identyfikator użytkownika |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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416 | */ |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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417 | void gg_tvbuilder_write_uin(gg_tvbuilder_t *tvb, uin_t uin) |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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418 | { |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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419 | char uin_str[16]; |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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420 | int uin_len; |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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421 | |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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422 | uin_len = snprintf(uin_str, sizeof(uin_str), "%u", uin); |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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423 | |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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424 | gg_tvbuilder_write_uint8(tvb, 0x00); |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
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425 | gg_tvbuilder_write_str(tvb, uin_str, uin_len); |
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c9069e0e3c36
Update internal libgadu to 1.12.0-rc2
Tomasz Wasilczyk <twasilczyk@pidgin.im>
parents:
diff
changeset
|
426 | } |