1 | //memmgr.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2012 |
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5 | * |
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6 | * This file is part of libroar a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * libroar is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | #include "libroar.h" |
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37 | |
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38 | #ifdef ROAR_USE_MEMMGR |
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39 | #define NULL_BUFFER_CONST "RoarAudio" |
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40 | static char _libroar_null_buffer[] = NULL_BUFFER_CONST; // A byte sequense >= 8 byte. |
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41 | |
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42 | static inline void _libroar_null_buffer_check(void) { |
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43 | if ( memcmp(_libroar_null_buffer, NULL_BUFFER_CONST, sizeof(_libroar_null_buffer)) != 0 ) |
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44 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION_GUARD, NULL); |
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45 | memcpy(_libroar_null_buffer, NULL_BUFFER_CONST, sizeof(_libroar_null_buffer)); |
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46 | } |
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47 | #endif |
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48 | |
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49 | #define _err(x) do { roar_err_set((x)); return NULL; } while (0) |
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50 | |
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51 | #ifdef ROAR_USE_MEMMGR |
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52 | |
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53 | int roar_mm_reset(void) { |
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54 | // currently this does nothing. |
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55 | // we need to free pools and such here later. |
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56 | return 0; |
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57 | } |
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58 | |
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59 | ssize_t roar_mm_sizeof(void * buf) { |
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60 | if ( buf == NULL ) { |
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61 | roar_err_set(ROAR_ERROR_FAULT); |
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62 | return -1; |
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63 | } |
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64 | |
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65 | if ( buf == _libroar_null_buffer_check ) |
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66 | return 0; |
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67 | |
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68 | roar_err_set(ROAR_ERROR_NOTSUP); |
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69 | return -1; |
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70 | } |
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71 | |
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72 | void * roar_mm_calloc(size_t nmemb, size_t size) { |
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73 | void * ret; |
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74 | |
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75 | if ( nmemb == 0 || size == 0 ) { |
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76 | _libroar_null_buffer_check(); |
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77 | return _libroar_null_buffer; |
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78 | } |
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79 | |
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80 | #ifdef ROAR_HAVE_CALLOC |
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81 | roar_err_clear_all(); |
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82 | ret = calloc(nmemb, size); |
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83 | |
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84 | if ( ret == NULL ) |
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85 | roar_err_update(); |
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86 | |
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87 | return ret; |
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88 | #else |
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89 | ret = roar_mm_malloc(nmemb*size); |
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90 | if ( ret == NULL ) |
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91 | return NULL; |
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92 | |
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93 | memset(ret, 0, nmemb*size); |
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94 | |
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95 | return ret; |
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96 | #endif |
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97 | } |
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98 | |
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99 | void * roar_mm_malloc(size_t size) { |
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100 | void * ret; |
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101 | |
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102 | if ( size == 0 ) { |
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103 | _libroar_null_buffer_check(); |
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104 | return _libroar_null_buffer; |
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105 | } |
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106 | |
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107 | #ifdef ROAR_HAVE_MALLOC |
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108 | roar_err_clear_all(); |
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109 | ret = malloc(size); |
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110 | |
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111 | if ( ret == NULL ) |
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112 | roar_err_update(); |
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113 | |
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114 | return ret; |
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115 | #elif defined(ROAR_HAVE_CALLOC) |
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116 | return roar_mm_calloc(1, size); |
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117 | #elif defined(ROAR_HAVE_REALLOC) |
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118 | return roar_mm_realloc(NULL, size); |
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119 | #else |
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120 | _err(ROAR_ERROR_NOSYS); |
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121 | #endif |
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122 | } |
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123 | |
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124 | int roar_mm_free(void *ptr) { |
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125 | |
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126 | if ( ptr == _libroar_null_buffer ) { |
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127 | _libroar_null_buffer_check(); |
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128 | return 0; |
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129 | } |
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130 | |
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131 | #ifdef ROAR_HAVE_FREE |
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132 | free(ptr); |
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133 | return 0; |
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134 | #elif defined(ROAR_HAVE_REALLOC) |
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135 | if ( roar_mm_realloc(ptr, 0) != _libroar_null_buffer ) |
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136 | return -1; |
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137 | return 0; |
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138 | #else |
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139 | roar_err_set(ROAR_ERROR_NOSYS); |
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140 | return -1; |
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141 | #endif |
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142 | } |
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143 | |
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144 | void * roar_mm_realloc(void *ptr, size_t size) { |
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145 | void * ret; |
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146 | #ifndef ROAR_HAVE_REALLOC |
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147 | ssize_t len; |
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148 | #endif |
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149 | |
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150 | if ( ptr == NULL ) |
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151 | return roar_mm_malloc(size); |
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152 | |
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153 | if ( size == 0 ) { |
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154 | roar_mm_free(ptr); |
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155 | _libroar_null_buffer_check(); |
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156 | return _libroar_null_buffer; |
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157 | } |
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158 | |
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159 | #ifdef ROAR_HAVE_REALLOC |
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160 | roar_err_clear_all(); |
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161 | ret = realloc(ptr, size); |
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162 | |
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163 | if ( ret == NULL ) |
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164 | roar_err_update(); |
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165 | |
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166 | return ret; |
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167 | #else |
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168 | len = roar_mm_sizeof(ptr); |
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169 | if ( len == -1 ) |
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170 | return NULL; |
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171 | |
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172 | ret = roar_mm_malloc(size); |
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173 | if ( ret == NULL ) |
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174 | return NULL; |
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175 | |
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176 | memcpy(ret, ptr, len > (ssize_t)size ? size : len); |
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177 | |
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178 | return ret; |
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179 | #endif |
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180 | } |
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181 | #endif |
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182 | |
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183 | void * roar_mm_memdup(const void * s, size_t len) { |
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184 | void * ret; |
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185 | |
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186 | if ( s == NULL ) |
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187 | _err(ROAR_ERROR_FAULT); |
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188 | |
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189 | #ifdef ROAR_USE_MEMMGR |
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190 | if ( len == 0 ) { |
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191 | _libroar_null_buffer_check(); |
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192 | return _libroar_null_buffer; |
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193 | } |
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194 | #endif |
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195 | |
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196 | ret = roar_mm_malloc(len); |
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197 | |
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198 | if ( ret == NULL ) |
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199 | return NULL; |
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200 | |
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201 | memcpy(ret, s, len); |
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202 | |
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203 | return ret; |
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204 | } |
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205 | |
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206 | void roar_mm_free_retvoid(void *ptr) { |
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207 | roar_mm_free(ptr); |
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208 | } |
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209 | |
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210 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRDUP) |
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211 | char * roar_mm_strdup(const char *s) { |
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212 | void * ret; |
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213 | #ifndef ROAR_HAVE_STRDUP |
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214 | ssize_t len; |
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215 | #endif |
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216 | |
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217 | if ( s == NULL ) |
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218 | _err(ROAR_ERROR_FAULT); |
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219 | |
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220 | #ifdef ROAR_HAVE_STRDUP |
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221 | roar_err_clear_all(); |
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222 | ret = strdup(s); |
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223 | |
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224 | if ( ret == NULL ) |
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225 | roar_err_update(); |
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226 | #else |
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227 | len = roar_mm_strlen(s); |
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228 | if ( len == -1 ) |
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229 | return NULL; |
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230 | |
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231 | ret = roar_mm_memdup(s, len+1); |
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232 | #endif |
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233 | |
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234 | return ret; |
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235 | } |
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236 | #endif |
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237 | |
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238 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRNDUP) |
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239 | char *roar_mm_strndup(const char *s, size_t n) { |
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240 | void * ret; |
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241 | #ifndef ROAR_HAVE_STRNDUP |
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242 | ssize_t len; |
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243 | #endif |
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244 | |
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245 | if ( s == NULL ) |
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246 | _err(ROAR_ERROR_FAULT); |
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247 | |
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248 | #ifdef ROAR_USE_MEMMGR |
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249 | if ( n == 0 ) { |
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250 | _libroar_null_buffer_check(); |
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251 | return _libroar_null_buffer; |
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252 | } |
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253 | #endif |
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254 | |
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255 | #ifdef ROAR_HAVE_STRNDUP |
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256 | roar_err_clear_all(); |
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257 | ret = strndup(s, n); |
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258 | |
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259 | if ( ret == NULL ) |
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260 | roar_err_update(); |
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261 | #else |
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262 | len = roar_mm_strnlen(s, n); |
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263 | if ( len == -1 ) |
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264 | return NULL; |
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265 | |
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266 | ret = roar_mm_memdup(s, len+1); |
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267 | #endif |
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268 | |
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269 | return ret; |
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270 | } |
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271 | #endif |
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272 | |
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273 | #ifndef ROAR_HAVE_STRLEN |
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274 | ssize_t roar_mm_strlen(const char *s) { |
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275 | size_t ret = 0; |
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276 | |
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277 | if ( s == NULL ) { |
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278 | roar_err_set(ROAR_ERROR_FAULT); |
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279 | return -1; |
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280 | } |
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281 | |
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282 | for (; *s != 0; s++, ret++); |
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283 | |
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284 | return ret; |
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285 | } |
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286 | #endif |
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287 | |
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288 | ssize_t roar_mm_strnlen(const char *s, size_t maxlen) { |
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289 | size_t ret = 0; |
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290 | |
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291 | if ( s == NULL ) { |
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292 | roar_err_set(ROAR_ERROR_FAULT); |
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293 | return -1; |
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294 | } |
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295 | |
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296 | #ifdef ROAR_HAVE_STRNLEN |
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297 | ret = strnlen(s, maxlen); |
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298 | #else |
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299 | for (; ret < maxlen && *s != 0; s++, ret++); |
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300 | #endif |
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301 | |
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302 | if ( ret == maxlen ) { |
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303 | roar_err_set(ROAR_ERROR_MSGSIZE); |
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304 | return -1; |
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305 | } |
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306 | |
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307 | return ret; |
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308 | } |
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309 | |
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310 | |
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311 | #ifndef ROAR_HAVE_STRLCPY |
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312 | ssize_t roar_mm_strlcpy(char *dst, const char *src, size_t size) { |
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313 | ssize_t len; |
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314 | |
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315 | if ( dst == NULL || src == NULL ) { |
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316 | roar_err_set(ROAR_ERROR_FAULT); |
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317 | return -1; |
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318 | } |
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319 | |
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320 | if ( size == 0 ) |
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321 | return 0; |
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322 | |
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323 | len = roar_mm_strlen(src); |
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324 | if ( len == -1 ) |
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325 | return -1; |
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326 | |
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327 | if ( len < (ssize_t)size ) { |
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328 | memcpy(dst, src, len); |
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329 | dst[len] = 0; |
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330 | } else { |
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331 | memcpy(dst, src, size - 1); |
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332 | dst[size-1] = 0; |
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333 | } |
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334 | |
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335 | return len; |
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336 | } |
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337 | #endif |
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338 | |
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339 | #ifndef ROAR_HAVE_STRLCAT |
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340 | ssize_t roar_mm_strlcat(char *dst, const char *src, size_t size) { |
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341 | ssize_t slen; |
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342 | ssize_t dlen; |
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343 | int err; |
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344 | |
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345 | if ( dst == NULL || src == NULL ) { |
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346 | roar_err_set(ROAR_ERROR_FAULT); |
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347 | return -1; |
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348 | } |
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349 | |
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350 | if ( size == 0 ) |
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351 | return 0; |
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352 | |
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353 | slen = roar_mm_strlen(src); |
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354 | if ( slen == -1 ) |
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355 | return -1; |
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356 | |
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357 | dlen = roar_mm_strnlen(dst, size); |
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358 | err = roar_error; |
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359 | if ( dlen == -1 && err == ROAR_ERROR_MSGSIZE ) |
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360 | dlen = size; |
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361 | |
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362 | if ( dlen == -1 ) |
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363 | return -1; |
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364 | |
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365 | if ( (dlen + slen) < (ssize_t)size ) { |
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366 | memcpy(dst+dlen, src, slen); |
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367 | dst[dlen+slen] = 0; |
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368 | } else if ( dlen != (ssize_t)size ) { |
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369 | memcpy(dst+dlen, src, size-dlen-1); |
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370 | dst[size-1] = 0; |
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371 | } |
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372 | |
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373 | return dlen+slen; |
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374 | } |
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375 | #endif |
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376 | |
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377 | #ifndef ROAR_HAVE_STRTOK_R |
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378 | char * roar_mm_strtok_r(char *str, const char *delim, char **saveptr) { |
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379 | char * next; |
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380 | |
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381 | if ( delim == NULL || saveptr == NULL ) { |
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382 | roar_err_set(ROAR_ERROR_FAULT); |
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383 | return NULL; |
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384 | } |
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385 | |
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386 | if ( delim[0] == 0 ) { |
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387 | roar_err_set(ROAR_ERROR_NOTSUP); |
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388 | return NULL; |
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389 | } |
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390 | |
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391 | if ( delim[1] != 0 ) { |
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392 | roar_err_set(ROAR_ERROR_NOTSUP); |
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393 | return NULL; |
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394 | } |
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395 | |
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396 | if ( str != NULL ) { |
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397 | next = str; |
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398 | } else { |
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399 | next = *saveptr; |
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400 | } |
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401 | |
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402 | if ( next == NULL ) { |
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403 | roar_err_set(ROAR_ERROR_NODATA); |
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404 | return NULL; |
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405 | } |
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406 | |
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407 | *saveptr = strstr(next, delim); |
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408 | |
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409 | if ( *saveptr != NULL ) { |
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410 | **saveptr = 0; |
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411 | (*saveptr)++; |
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412 | } |
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413 | |
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414 | return next; |
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415 | } |
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416 | #endif |
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417 | |
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418 | //ll |
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