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annotate packages/language/c/libc/string/current/include/stringsupp.hxx @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
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children e0c0827131d1
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1 #ifndef CYGONCE_LIBC_STRING_STRINGSUPP_HXX
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2 #define CYGONCE_LIBC_STRING_STRINGSUPP_HXX
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3 //===========================================================================
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4 //
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5 // stringsupp.hxx
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6 //
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7 // Support for the ANSI standard string functions
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8 //
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9 //===========================================================================
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10 //####COPYRIGHTBEGIN####
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11 //
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12 // -------------------------------------------
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13 // The contents of this file are subject to the Red Hat eCos Public License
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14 // Version 1.1 (the "License"); you may not use this file except in
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15 // compliance with the License. You may obtain a copy of the License at
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16 // http://www.redhat.com/
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17 //
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18 // Software distributed under the License is distributed on an "AS IS"
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19 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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20 // License for the specific language governing rights and limitations under
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21 // the License.
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22 //
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23 // The Original Code is eCos - Embedded Configurable Operating System,
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24 // released September 30, 1998.
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25 //
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26 // The Initial Developer of the Original Code is Red Hat.
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27 // Portions created by Red Hat are
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28 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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29 // All Rights Reserved.
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30 // -------------------------------------------
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31 //
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32 //####COPYRIGHTEND####
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33 //===========================================================================
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34 //#####DESCRIPTIONBEGIN####
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35 //
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36 // Author(s): jlarmour
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37 // Contributors: jlarmour
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38 // Date: 2000-04-14
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39 // Purpose: Internal support for the libc string function implementations
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40 // Description:
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41 // Usage:
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42 //
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43 //####DESCRIPTIONEND####
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44 //
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45 //===========================================================================
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46
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47 // CONFIGURATION
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48
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49 #include <pkgconf/libc_string.h> // Configuration header
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50
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51 // INCLUDES
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52
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53 #include <cyg/infra/cyg_type.h> // Common type definitions
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54 #include <stddef.h> // Compiler definitions such as
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55 // size_t, NULL etc.
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56
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57 // CONSTANTS
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58
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59 #ifndef CYGIMP_LIBC_STRING_PREFER_SMALL_TO_FAST
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60
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61 // Masks for CYG_LIBC_STR_DETECTNULL below
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62 externC const cyg_uint64 Cyg_libc_str_null_mask_1;
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63 externC const cyg_uint64 Cyg_libc_str_null_mask_2;
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64
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65 #endif
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66
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67 // MACROS
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68
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69 // Nonzero if X is not aligned on a word boundary.
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70 #define CYG_LIBC_STR_UNALIGNED(X) ((CYG_WORD)(X) & (sizeof (CYG_WORD) - 1))
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71
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72 // Nonzero if either X or Y is not aligned on a word boundary.
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73 #define CYG_LIBC_STR_UNALIGNED2(X , Y) \
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74 (((CYG_WORD)(X) & (sizeof (CYG_WORD) - 1)) | \
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75 ((CYG_WORD)(Y) & (sizeof (CYG_WORD) - 1)))
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76
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77 // Nonzero if any byte of X contains a NULL.
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78 #define CYG_LIBC_STR_DETECTNULL(X) \
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79 (((X) - (CYG_WORD)Cyg_libc_str_null_mask_1) & \
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80 ~(X) & (CYG_WORD)Cyg_libc_str_null_mask_2)
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81
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82 // How many bytes are copied each iteration of the 4X unrolled loop in the
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83 // optimised string implementations
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84 #define CYG_LIBC_STR_OPT_BIGBLOCKSIZE (sizeof(CYG_WORD) << 2)
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85
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86 // How many bytes are copied each iteration of the word copy loop in the
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87 // optimised string implementations
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88 #define CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE (sizeof (CYG_WORD))
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89
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90 // Threshold for punting to the byte copier in the optimised string
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91 // implementations
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92 #define CYG_LIBC_STR_OPT_TOO_SMALL(LEN) \
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93 ((LEN) < CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE)
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94
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95
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96 // FUNCTION PROTOTYPES
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97
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98 // These are function prototypes for the aliased functions that actually
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99 // implement the string functions
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100
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101 //===========================================================================
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102
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103 // 7.11.2 Copying functions
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104
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105 externC void *
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106 __memmove( void *, const void *, size_t );
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107
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108
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109 externC char *
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110 __strcpy( char *, const char * );
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111
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112
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113 externC char *
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114 __strncpy( char *, const char *, size_t );
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115
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116
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117 //===========================================================================
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118
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119 // 7.11.3 Concatenation functions
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120
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121
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122 externC char *
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123 __strcat( char *, const char * );
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124
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125
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126 externC char *
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127 __strncat( char *, const char *, size_t );
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128
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129
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130 //===========================================================================
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131
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132 // 7.11.4 Comparison functions
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133
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134 externC int
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135 __memcmp( const void *, const void *, size_t );
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136
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137
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138 externC int
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139 __strcmp( const char *, const char * );
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140
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141
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142 externC int
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143 __strcoll( const char *, const char * );
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144
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145
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146 externC int
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147 __strncmp( const char *, const char *, size_t );
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148
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149
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150 externC size_t
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151 __strxfrm( char *, const char *, size_t );
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152
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153
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154 //===========================================================================
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155
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156 // 7.11.5 Search functions
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157
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158
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159 externC void *
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160 __memchr( const void *, int , size_t );
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161
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162
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163 externC char *
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164 __strchr( const char *, int );
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165
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166
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167 externC size_t
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168 __strcspn( const char *, const char * );
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169
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170
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171 externC char *
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172 __strpbrk( const char *, const char * );
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173
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174
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175 externC char *
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176 __strrchr( const char *, int );
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177
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178
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179 externC size_t
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180 __strspn( const char *, const char * );
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181
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182
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183 externC char *
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184 __strstr( const char *, const char * );
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185
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186
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187 externC char *
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188 __strtok( char *, const char * );
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189
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190 // For POSIX 1003.1 section 8.3.3 strtok_r()
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191
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192 externC char *
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193 __strtok_r( char *, const char *, char ** );
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194
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195
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196 //===========================================================================
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197
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198 // 7.11.6 Miscellaneous functions
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199
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200 externC size_t
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201 __strlen( const char * );
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202
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203 #endif // CYGONCE_LIBC_STRING_STRINGSUPP_HXX multiple inclusion protection
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204
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205 // EOF stringsupp.hxx