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annotate packages/language/c/libc/string/current/include/stringsupp.hxx @ 2729:74dbf4c3f2e1 after-copyright-change-20090129

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Update all copyright banners to reflect FSF ownership; fix and improve licence text.
author jlarmour
date Thu, 29 Jan 2009 17:47:46 +0000
parents f8ef9a4bea92
children ae816c83f082
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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 // ####ECOSGPLCOPYRIGHTBEGIN####
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11 // -------------------------------------------
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12 // This file is part of eCos, the Embedded Configurable Operating System.
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13 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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14 //
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15 // eCos is free software; you can redistribute it and/or modify it under
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16 // the terms of the GNU General Public License as published by the Free
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17 // Software Foundation; either version 2 or (at your option) any later
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18 // version.
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19 //
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20 // eCos is distributed in the hope that it will be useful, but WITHOUT
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21 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 // for more details.
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24 //
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25 // You should have received a copy of the GNU General Public License
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26 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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27 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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28 //
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29 // As a special exception, if other files instantiate templates or use
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30 // macros or inline functions from this file, or you compile this file
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31 // and link it with other works to produce a work based on this file,
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32 // this file does not by itself cause the resulting work to be covered by
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33 // the GNU General Public License. However the source code for this file
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34 // must still be made available in accordance with section (3) of the GNU
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35 // General Public License v2.
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36 //
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37 // This exception does not invalidate any other reasons why a work based
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38 // on this file might be covered by the GNU General Public License.
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39 // -------------------------------------------
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40 // ####ECOSGPLCOPYRIGHTEND####
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41 //===========================================================================
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42 //#####DESCRIPTIONBEGIN####
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43 //
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44 // Author(s): jlarmour
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45 // Contributors: jlarmour
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46 // Date: 2000-04-14
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47 // Purpose: Internal support for the libc string function implementations
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48 // Description:
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49 // Usage:
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //===========================================================================
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54
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55 // CONFIGURATION
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56
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57 #include <pkgconf/libc_string.h> // Configuration header
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58
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59 // INCLUDES
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60
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61 #include <cyg/infra/cyg_type.h> // Common type definitions
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62 #include <stddef.h> // Compiler definitions such as
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63 // size_t, NULL etc.
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64
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65 // CONSTANTS
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66
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67 #ifndef CYGIMP_LIBC_STRING_PREFER_SMALL_TO_FAST
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68
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69 // Masks for CYG_LIBC_STR_DETECTNULL below
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70 __externC const cyg_uint64 Cyg_libc_str_null_mask_1;
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71 __externC const cyg_uint64 Cyg_libc_str_null_mask_2;
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72
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73 #endif
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74
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75 // MACROS
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76
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77 // Nonzero if X is not aligned on a word boundary.
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78 #define CYG_LIBC_STR_UNALIGNED(X) ((CYG_WORD)(X) & (sizeof (CYG_WORD) - 1))
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79
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80 // Nonzero if either X or Y is not aligned on a word boundary.
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81 #define CYG_LIBC_STR_UNALIGNED2(X , Y) \
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82 (((CYG_WORD)(X) & (sizeof (CYG_WORD) - 1)) | \
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83 ((CYG_WORD)(Y) & (sizeof (CYG_WORD) - 1)))
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84
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85 // Nonzero if any byte of X contains a NULL.
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86 #define CYG_LIBC_STR_DETECTNULL(X) \
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87 (((X) - (CYG_WORD)Cyg_libc_str_null_mask_1) & \
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88 ~(X) & (CYG_WORD)Cyg_libc_str_null_mask_2)
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89
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90 // How many bytes are copied each iteration of the 4X unrolled loop in the
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91 // optimised string implementations
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92 #define CYG_LIBC_STR_OPT_BIGBLOCKSIZE (sizeof(CYG_WORD) << 2)
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93
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94 // How many bytes are copied each iteration of the word copy loop in the
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95 // optimised string implementations
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96 #define CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE (sizeof (CYG_WORD))
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97
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98 // Threshold for punting to the byte copier in the optimised string
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99 // implementations
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100 #define CYG_LIBC_STR_OPT_TOO_SMALL(LEN) \
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101 ((LEN) < CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE)
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102
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103
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104 // FUNCTION PROTOTYPES
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105
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106 // These are function prototypes for the aliased functions that actually
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107 // implement the string functions
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108
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109 //===========================================================================
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110
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111 // 7.11.2 Copying functions
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112
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113 __externC void *
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114 __memmove( void *, const void *, size_t );
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115
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116
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117 __externC char *
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118 __strcpy( char *, const char * );
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119
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120
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121 __externC char *
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122 __strncpy( char *, const char *, size_t );
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123
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124
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125 //===========================================================================
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126
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127 // 7.11.3 Concatenation functions
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128
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129
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130 __externC char *
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131 __strcat( char *, const char * );
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132
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133
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134 __externC char *
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135 __strncat( char *, const char *, size_t );
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136
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137
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138 //===========================================================================
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139
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140 // 7.11.4 Comparison functions
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141
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142 __externC int
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143 __memcmp( const void *, const void *, size_t );
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144
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145
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146 __externC int
115
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147 __strcmp( const char *, const char * );
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148
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149
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150 __externC int
115
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151 __strcoll( const char *, const char * );
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152
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153
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154 __externC int
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155 __strncmp( const char *, const char *, size_t );
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156
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157
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158 __externC size_t
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159 __strxfrm( char *, const char *, size_t );
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160
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161
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162 //===========================================================================
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163
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164 // 7.11.5 Search functions
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165
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166
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167 __externC void *
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168 __memchr( const void *, int , size_t );
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169
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170
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171 __externC char *
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172 __strchr( const char *, int );
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173
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174
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175 __externC size_t
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176 __strcspn( const char *, const char * );
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177
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178
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179 __externC char *
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180 __strpbrk( 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 __strrchr( const char *, int );
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185
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186
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187 __externC size_t
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188 __strspn( const char *, const char * );
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189
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190
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191 __externC char *
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192 __strstr( const char *, const char * );
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193
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194
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195 __externC char *
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196 __strtok( char *, const char * );
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197
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198 // For POSIX 1003.1 section 8.3.3 strtok_r()
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199
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200 __externC char *
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201 __strtok_r( char *, const char *, char ** );
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202
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203
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204 //===========================================================================
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205
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206 // 7.11.6 Miscellaneous functions
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207
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208 __externC size_t
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209 __strlen( const char * );
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210
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211 // NB This is a BSD function
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212 __externC char *
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213 __strdup( const char * );
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214
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215 #endif // CYGONCE_LIBC_STRING_STRINGSUPP_HXX multiple inclusion protection
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216
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217 // EOF stringsupp.hxx