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annotate packages/language/c/libc/string/current/include/stringsupp.hxx @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
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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 //===========================================================================
208
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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 Red Hat, 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 version.
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18 //
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19 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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20 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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21 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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22 // for more details.
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23 //
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24 // You should have received a copy of the GNU General Public License along
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25 // with eCos; if not, write to the Free Software Foundation, Inc.,
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26 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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27 //
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28 // As a special exception, if other files instantiate templates or use macros
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29 // or inline functions from this file, or you compile this file and link it
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30 // with other works to produce a work based on this file, this file does not
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31 // by itself cause the resulting work to be covered by the GNU General Public
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32 // License. However the source code for this file must still be made available
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33 // in accordance with section (3) of the GNU General Public License.
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34 //
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35 // This exception does not invalidate any other reasons why a work based on
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36 // this file might be covered by the GNU General Public License.
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37 //
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38 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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39 // at http://sources.redhat.com/ecos/ecos-license
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40 // -------------------------------------------
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41 //####ECOSGPLCOPYRIGHTEND####
115
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42 //===========================================================================
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43 //#####DESCRIPTIONBEGIN####
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44 //
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45 // Author(s): jlarmour
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46 // Contributors: jlarmour
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47 // Date: 2000-04-14
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48 // Purpose: Internal support for the libc string function implementations
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49 // Description:
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50 // Usage:
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //===========================================================================
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55
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56 // CONFIGURATION
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57
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58 #include <pkgconf/libc_string.h> // Configuration header
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59
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60 // INCLUDES
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61
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62 #include <cyg/infra/cyg_type.h> // Common type definitions
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63 #include <stddef.h> // Compiler definitions such as
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64 // size_t, NULL etc.
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65
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66 // CONSTANTS
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67
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68 #ifndef CYGIMP_LIBC_STRING_PREFER_SMALL_TO_FAST
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69
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70 // Masks for CYG_LIBC_STR_DETECTNULL below
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71 externC const cyg_uint64 Cyg_libc_str_null_mask_1;
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72 externC const cyg_uint64 Cyg_libc_str_null_mask_2;
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73
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74 #endif
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75
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76 // MACROS
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77
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78 // Nonzero if X is not aligned on a word boundary.
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79 #define CYG_LIBC_STR_UNALIGNED(X) ((CYG_WORD)(X) & (sizeof (CYG_WORD) - 1))
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80
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81 // Nonzero if either X or Y is not aligned on a word boundary.
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82 #define CYG_LIBC_STR_UNALIGNED2(X , Y) \
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83 (((CYG_WORD)(X) & (sizeof (CYG_WORD) - 1)) | \
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84 ((CYG_WORD)(Y) & (sizeof (CYG_WORD) - 1)))
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85
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86 // Nonzero if any byte of X contains a NULL.
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87 #define CYG_LIBC_STR_DETECTNULL(X) \
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88 (((X) - (CYG_WORD)Cyg_libc_str_null_mask_1) & \
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89 ~(X) & (CYG_WORD)Cyg_libc_str_null_mask_2)
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90
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91 // How many bytes are copied each iteration of the 4X unrolled loop in the
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92 // optimised string implementations
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93 #define CYG_LIBC_STR_OPT_BIGBLOCKSIZE (sizeof(CYG_WORD) << 2)
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94
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95 // How many bytes are copied each iteration of the word copy loop in the
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96 // optimised string implementations
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97 #define CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE (sizeof (CYG_WORD))
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98
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99 // Threshold for punting to the byte copier in the optimised string
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100 // implementations
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101 #define CYG_LIBC_STR_OPT_TOO_SMALL(LEN) \
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102 ((LEN) < CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE)
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103
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104
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105 // FUNCTION PROTOTYPES
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106
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107 // These are function prototypes for the aliased functions that actually
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108 // implement the string functions
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109
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110 //===========================================================================
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111
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112 // 7.11.2 Copying functions
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113
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114 externC void *
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115 __memmove( void *, const void *, size_t );
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116
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117
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118 externC char *
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119 __strcpy( char *, const char * );
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120
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121
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122 externC char *
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123 __strncpy( char *, const char *, size_t );
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124
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125
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126 //===========================================================================
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127
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128 // 7.11.3 Concatenation functions
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129
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130
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131 externC char *
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132 __strcat( char *, const char * );
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133
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134
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135 externC char *
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136 __strncat( char *, const char *, size_t );
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137
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138
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139 //===========================================================================
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140
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141 // 7.11.4 Comparison functions
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142
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143 externC int
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144 __memcmp( const void *, const void *, size_t );
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145
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146
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147 externC int
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148 __strcmp( const char *, const char * );
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149
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150
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151 externC int
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152 __strcoll( const char *, const char * );
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153
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154
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155 externC int
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156 __strncmp( const char *, const char *, size_t );
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157
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158
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159 externC size_t
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160 __strxfrm( char *, const char *, size_t );
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161
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162
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163 //===========================================================================
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164
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165 // 7.11.5 Search functions
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166
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167
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168 externC void *
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169 __memchr( const void *, int , size_t );
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170
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171
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172 externC char *
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173 __strchr( const char *, int );
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174
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175
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176 externC size_t
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177 __strcspn( const char *, const char * );
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178
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179
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180 externC char *
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181 __strpbrk( const char *, const char * );
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182
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183
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184 externC char *
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185 __strrchr( const char *, int );
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186
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187
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188 externC size_t
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189 __strspn( const char *, const char * );
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190
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191
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192 externC char *
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193 __strstr( const char *, const char * );
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194
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195
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196 externC char *
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197 __strtok( char *, const char * );
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198
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199 // For POSIX 1003.1 section 8.3.3 strtok_r()
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200
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201 externC char *
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202 __strtok_r( char *, const char *, char ** );
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203
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204
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205 //===========================================================================
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206
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207 // 7.11.6 Miscellaneous functions
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208
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209 externC size_t
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210 __strlen( const char * );
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211
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212 #endif // CYGONCE_LIBC_STRING_STRINGSUPP_HXX multiple inclusion protection
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213
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214 // EOF stringsupp.hxx