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 - 2010-2011 |
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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 | #endif |
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42 | |
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43 | #define _err(x) do { roar_err_set((x)); return NULL; } while (0) |
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44 | |
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45 | #ifdef ROAR_USE_MEMMGR |
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46 | void * roar_mm_calloc(size_t nmemb, size_t size) { |
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47 | void * ret; |
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48 | |
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49 | if ( nmemb == 0 || size == 0 ) |
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50 | return _libroar_null_buffer; |
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51 | |
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52 | #ifdef ROAR_HAVE_CALLOC |
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53 | roar_err_clear_all(); |
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54 | ret = calloc(nmemb, size); |
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55 | |
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56 | if ( ret == NULL ) |
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57 | roar_err_update(); |
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58 | |
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59 | return ret; |
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60 | #else |
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61 | ret = roar_mm_malloc(nmemb*size); |
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62 | if ( ret == NULL ) |
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63 | return NULL; |
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64 | |
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65 | memset(ret, 0, nmemb*size); |
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66 | |
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67 | return ret; |
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68 | #endif |
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69 | } |
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70 | |
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71 | void * roar_mm_malloc(size_t size) { |
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72 | void * ret; |
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73 | |
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74 | if ( size == 0 ) |
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75 | return _libroar_null_buffer; |
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76 | |
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77 | #ifdef ROAR_HAVE_MALLOC |
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78 | roar_err_clear_all(); |
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79 | ret = malloc(size); |
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80 | |
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81 | if ( ret == NULL ) |
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82 | roar_err_update(); |
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83 | |
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84 | return ret; |
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85 | #elif defined(ROAR_HAVE_CALLOC) |
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86 | return roar_mm_calloc(1, size); |
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87 | #elif defined(ROAR_HAVE_REALLOC) |
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88 | return roar_mm_realloc(NULL, size); |
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89 | #else |
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90 | _err(ROAR_ERROR_NOSYS); |
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91 | #endif |
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92 | } |
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93 | |
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94 | int roar_mm_free(void *ptr) { |
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95 | if ( ptr == _libroar_null_buffer ) |
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96 | return 0; |
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97 | |
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98 | #ifdef ROAR_HAVE_FREE |
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99 | free(ptr); |
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100 | return 0; |
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101 | #elif defined(ROAR_HAVE_REALLOC) |
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102 | if ( roar_mm_realloc(ptr, 0) != _libroar_null_buffer ) |
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103 | return -1; |
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104 | return 0; |
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105 | #else |
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106 | roar_err_set(ROAR_ERROR_NOSYS); |
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107 | return -1; |
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108 | #endif |
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109 | } |
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110 | |
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111 | void * roar_mm_realloc(void *ptr, size_t size) { |
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112 | #ifdef ROAR_HAVE_REALLOC |
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113 | void * ret; |
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114 | #endif |
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115 | |
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116 | if ( ptr == NULL ) |
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117 | return roar_mm_malloc(size); |
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118 | |
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119 | if ( size == 0 ) { |
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120 | roar_mm_free(ptr); |
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121 | return _libroar_null_buffer; |
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122 | } |
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123 | |
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124 | #ifdef ROAR_HAVE_REALLOC |
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125 | roar_err_clear_all(); |
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126 | ret = realloc(ptr, size); |
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127 | |
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128 | if ( ret == NULL ) |
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129 | roar_err_update(); |
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130 | |
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131 | return ret; |
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132 | #else |
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133 | _err(ROAR_ERROR_NOTSUP); |
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134 | #endif |
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135 | } |
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136 | #endif |
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137 | |
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138 | void * roar_mm_memdup(const void * s, size_t len) { |
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139 | void * ret; |
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140 | |
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141 | if ( s == NULL ) |
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142 | _err(ROAR_ERROR_FAULT); |
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143 | |
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144 | ret = roar_mm_malloc(len); |
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145 | |
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146 | if ( ret == NULL ) |
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147 | return NULL; |
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148 | |
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149 | memcpy(ret, s, len); |
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150 | |
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151 | return ret; |
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152 | } |
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153 | |
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154 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRDUP) |
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155 | char * roar_mm_strdup(const char *s) { |
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156 | void * ret; |
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157 | #ifndef ROAR_HAVE_STRDUP |
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158 | ssize_t len; |
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159 | #endif |
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160 | |
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161 | if ( s == NULL ) |
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162 | _err(ROAR_ERROR_FAULT); |
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163 | |
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164 | #ifdef ROAR_HAVE_STRDUP |
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165 | roar_err_clear_all(); |
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166 | ret = strdup(s); |
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167 | |
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168 | if ( ret == NULL ) |
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169 | roar_err_update(); |
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170 | #else |
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171 | len = roar_mm_strlen(s); |
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172 | if ( len == -1 ) |
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173 | return NULL; |
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174 | |
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175 | ret = roar_mm_memdup(s, len+1); |
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176 | #endif |
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177 | |
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178 | return ret; |
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179 | } |
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180 | #endif |
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181 | |
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182 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRNDUP) |
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183 | char *roar_mm_strndup(const char *s, size_t n) { |
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184 | void * ret; |
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185 | #ifndef ROAR_HAVE_STRDUP |
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186 | ssize_t len; |
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187 | #endif |
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188 | |
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189 | if ( s == NULL ) |
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190 | _err(ROAR_ERROR_FAULT); |
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191 | |
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192 | #ifdef ROAR_HAVE_STRDUP |
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193 | roar_err_clear_all(); |
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194 | ret = strndup(s, n); |
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195 | |
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196 | if ( ret == NULL ) |
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197 | roar_err_update(); |
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198 | #else |
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199 | len = roar_mm_strnlen(s, n); |
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200 | if ( len == -1 ) |
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201 | return NULL; |
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202 | |
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203 | ret = roar_mm_memdup(s, len+1); |
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204 | #endif |
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205 | |
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206 | return ret; |
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207 | } |
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208 | #endif |
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209 | |
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210 | #ifndef ROAR_HAVE_STRLEN |
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211 | ssize_t roar_mm_strlen(const char *s) { |
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212 | size_t ret = 0; |
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213 | |
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214 | if ( s == NULL ) { |
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215 | roar_err_set(ROAR_ERROR_FAULT); |
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216 | return -1; |
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217 | } |
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218 | |
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219 | for (; *s != 0; s++, ret++); |
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220 | |
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221 | return ret; |
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222 | } |
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223 | #endif |
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224 | |
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225 | ssize_t roar_mm_strnlen(const char *s, size_t maxlen) { |
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226 | size_t ret = 0; |
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227 | |
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228 | if ( s == NULL ) { |
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229 | roar_err_set(ROAR_ERROR_FAULT); |
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230 | return -1; |
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231 | } |
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232 | |
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233 | #ifdef ROAR_HAVE_STRNLEN |
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234 | ret = strnlen(s, maxlen); |
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235 | #else |
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236 | for (; ret < maxlen && *s != 0; s++, ret++); |
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237 | #endif |
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238 | |
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239 | if ( ret == maxlen ) { |
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240 | roar_err_set(ROAR_ERROR_MSGSIZE); |
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241 | return -1; |
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242 | } |
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243 | |
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244 | return ret; |
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245 | } |
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246 | |
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247 | //ll |
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