Mercurial > trustbridge > nss-cmake-static

annotate nss/lib/base/libc.c @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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4
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5 /*
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6 * libc.c
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7 *
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8 * This file contains our wrappers/reimplementations for "standard"
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9 * libc functions. Things like "memcpy." We add to this as we need
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10 * it. Oh, and let's keep it in alphabetical order, should it ever
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11 * get large. Most string/character stuff should be in utf8.c, not
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12 * here. This file (and maybe utf8.c) should be the only ones in
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13 * NSS to include files with angle brackets.
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14 */
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15
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16 #ifndef BASE_H
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17 #include "base.h"
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18 #endif /* BASE_H */
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19
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20 #include <string.h> /* memcpy, memset */
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21
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22 /*
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23 * nsslibc_memcpy
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24 * nsslibc_memset
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25 * nsslibc_offsetof
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26 * nsslibc_memequal
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27 */
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28
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29 /*
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30 * nsslibc_memcpy
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31 *
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32 * Errors:
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33 * NSS_ERROR_INVALID_POINTER
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34 *
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35 * Return value:
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36 * NULL on error
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37 * The destination pointer on success
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38 */
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39
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40 NSS_IMPLEMENT void *
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41 nsslibc_memcpy
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42 (
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43 void *dest,
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44 const void *source,
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45 PRUint32 n
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46 )
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47 {
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48 #ifdef NSSDEBUG
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49 if( ((void *)NULL == dest) || ((const void *)NULL == source) ) {
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50 nss_SetError(NSS_ERROR_INVALID_POINTER);
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51 return (void *)NULL;
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52 }
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53 #endif /* NSSDEBUG */
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54
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55 return memcpy(dest, source, (size_t)n);
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56 }
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57
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58 /*
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59 * nsslibc_memset
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60 *
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61 * Errors:
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62 * NSS_ERROR_INVALID_POINTER
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63 *
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64 * Return value:
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65 * NULL on error
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66 * The destination pointer on success
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67 */
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68
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69 NSS_IMPLEMENT void *
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70 nsslibc_memset
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71 (
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72 void *dest,
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73 PRUint8 byte,
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74 PRUint32 n
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75 )
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76 {
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77 #ifdef NSSDEBUG
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78 if( ((void *)NULL == dest) ) {
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79 nss_SetError(NSS_ERROR_INVALID_POINTER);
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80 return (void *)NULL;
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81 }
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82 #endif /* NSSDEBUG */
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83
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84 return memset(dest, (int)byte, (size_t)n);
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85 }
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86
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87 /*
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88 * nsslibc_memequal
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89 *
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90 * Errors:
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91 * NSS_ERROR_INVALID_POINTER
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92 *
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93 * Return value:
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94 * PR_TRUE if they match
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95 * PR_FALSE if they don't
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96 * PR_FALSE upon error
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97 */
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98
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99 NSS_IMPLEMENT PRBool
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100 nsslibc_memequal
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101 (
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102 const void *a,
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103 const void *b,
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104 PRUint32 len,
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105 PRStatus *statusOpt
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106 )
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107 {
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108 #ifdef NSSDEBUG
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109 if( (((void *)NULL == a) || ((void *)NULL == b)) ) {
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110 nss_SetError(NSS_ERROR_INVALID_POINTER);
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111 if( (PRStatus *)NULL != statusOpt ) {
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112 *statusOpt = PR_FAILURE;
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113 }
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114 return PR_FALSE;
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115 }
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116 #endif /* NSSDEBUG */
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117
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118 if( (PRStatus *)NULL != statusOpt ) {
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119 *statusOpt = PR_SUCCESS;
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120 }
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121
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122 if( 0 == memcmp(a, b, len) ) {
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123 return PR_TRUE;
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124 } else {
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125 return PR_FALSE;
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126 }
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127 }
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128
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129 /*
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130 * nsslibc_memcmp
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131 */
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132
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133 NSS_IMPLEMENT PRInt32
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134 nsslibc_memcmp
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135 (
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136 const void *a,
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137 const void *b,
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138 PRUint32 len,
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139 PRStatus *statusOpt
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140 )
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141 {
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142 int v;
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143
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144 #ifdef NSSDEBUG
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145 if( (((void *)NULL == a) || ((void *)NULL == b)) ) {
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146 nss_SetError(NSS_ERROR_INVALID_POINTER);
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147 if( (PRStatus *)NULL != statusOpt ) {
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148 *statusOpt = PR_FAILURE;
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149 }
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150 return -2;
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151 }
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152 #endif /* NSSDEBUG */
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153
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154 if( (PRStatus *)NULL != statusOpt ) {
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155 *statusOpt = PR_SUCCESS;
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156 }
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157
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158 v = memcmp(a, b, len);
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159 return (PRInt32)v;
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160 }
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161
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162 /*
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163 * offsetof is a preprocessor definition
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164 */
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