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annotate packages/language/c/libc/string/current/src/strtok.cxx @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //===========================================================================
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2 //
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3 // strtok.cxx
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4 //
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5 // ISO standard strtok() routine
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6 //
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7 //===========================================================================
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8 // ####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //===========================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): jlarmour
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43 // Contributors: jlarmour
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44 // Date: 2000-04-14
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45 // Purpose: Provide ISO C strtok() and POSIX strtok_r() routines
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46 // Description:
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47 // Usage:
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //===========================================================================
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52 //
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53 // This code is based on original code with the following copyright:
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54 //
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55 /*
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56 * Copyright (c) 1988 Regents of the University of California.
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57 * All rights reserved.
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58 *
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59 * Redistribution and use in source and binary forms, with or without
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60 * modification, are permitted provided that the following conditions
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61 * are met:
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62 * 1. Redistributions of source code must retain the above copyright
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63 * notice, this list of conditions and the following disclaimer.
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64 * 2. Redistributions in binary form must reproduce the above copyright
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65 * notice, this list of conditions and the following disclaimer in the
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66 * documentation and/or other materials provided with the distribution.
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67 * 3. Neither the name of the University nor the names of its contributors
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68 * may be used to endorse or promote products derived from this software
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69 * without specific prior written permission.
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70 *
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71 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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72 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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73 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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74 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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75 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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76 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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77 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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78 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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79 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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80 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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81 * SUCH DAMAGE.
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82 */
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83
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84
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85 // CONFIGURATION
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86
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87 #include <pkgconf/libc_string.h> // Configuration header
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88
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89 // INCLUDES
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90
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91 #include <cyg/infra/cyg_type.h> // Common type definitions
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92 #include <cyg/infra/cyg_trac.h> // Tracing support
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93 #include <cyg/infra/cyg_ass.h> // Assertion support
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94 #include <string.h> // Header for this file
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95 #include <stddef.h> // Compiler definitions such as size_t, NULL etc.
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96 #include <cyg/libc/string/stringsupp.hxx> // Useful string function support and
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97 // prototypes
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98
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99 #ifdef CYGSEM_LIBC_STRING_PER_THREAD_STRTOK
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100 # include <pkgconf/kernel.h> // kernel configuration
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101 # include <cyg/kernel/thread.hxx> // per-thread data
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102 # include <cyg/kernel/thread.inl> // per-thread data
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103 # include <cyg/kernel/mutex.hxx> // mutexes
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104 #endif
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105
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106 // TRACE
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107
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108 #if defined(CYGDBG_USE_TRACING) && defined(CYGNUM_LIBC_STRING_STRTOK_TRACE_LEVEL)
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109 static int strtok_trace = CYGNUM_LIBC_STRING_STRTOK_TRACE_LEVEL;
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110 # define TL1 (0 < strtok_trace)
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111 #else
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112 # define TL1 (0)
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113 #endif
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114
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115 // STATICS
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116
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117 #ifdef CYGSEM_LIBC_STRING_PER_THREAD_STRTOK
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118 static Cyg_Thread::cyg_data_index
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119 strtok_data_index=CYGNUM_KERNEL_THREADS_DATA_MAX;
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120
115
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121 static Cyg_Mutex strtok_data_mutex CYG_INIT_PRIORITY(LIBC);
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122 #else
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123 static char *cyg_libc_strtok_last;
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124 #endif
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125
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126 // FUNCTIONS
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127
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128 char *
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129 strtok( char *s1, const char *s2 )
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130 {
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131 char **lasts;
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132 char *retval;
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133
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134 CYG_REPORT_FUNCNAMETYPE( "strtok", "returning %08x" );
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135 CYG_REPORT_FUNCARG2( "s1=%08x, s2=%08x", s1, s2 );
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136
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137 if (s1 != NULL)
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138 CYG_CHECK_DATA_PTR( s1, "s1 is not a valid pointer!" );
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139 CYG_CHECK_DATA_PTR( s2, "s2 is not a valid pointer!" );
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140
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141 #ifdef CYGSEM_LIBC_STRING_PER_THREAD_STRTOK
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142 Cyg_Thread *self = Cyg_Thread::self();
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143
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144 // Get a per-thread data slot if we haven't got one already
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145 // Do a simple test before locking and retrying test, as this is a
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146 // rare situation
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147 if (CYGNUM_KERNEL_THREADS_DATA_MAX==strtok_data_index) {
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148 strtok_data_mutex.lock();
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149 if (CYGNUM_KERNEL_THREADS_DATA_MAX==strtok_data_index) {
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150
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151 // FIXME: Should use real CDL to pre-allocate a slot at compile
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152 // time to ensure there are enough slots
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153 strtok_data_index = self->new_data_index();
1542
f8ef9a4bea92 * include/string.h: Prototype strdup().
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154 CYG_ASSERT(strtok_data_index >= 0,
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155 "failed to allocate data index" );
115
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156 }
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157 strtok_data_mutex.unlock();
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158 } // if
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159
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160 // we have a valid index now
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161
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162 lasts = (char **)self->get_data_ptr(strtok_data_index);
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163 #else
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164 lasts = &cyg_libc_strtok_last;
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165 #endif
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166
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167 CYG_TRACE2( TL1, "Retrieved strtok_last address %08x containing %s",
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168 lasts, *lasts );
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169
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170 retval = strtok_r( s1, s2, lasts );
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171
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172 CYG_REPORT_RETVAL( retval );
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173
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174 return retval;
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175 } // strtok()
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176
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177 char *
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178 strtok_r( char *s1, const char *s2, char **lasts )
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179 {
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180 char *spanp;
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181 int c, sc;
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182 char *tok;
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183
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184 CYG_REPORT_FUNCNAMETYPE( "strtok_r", "returning %08x" );
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185 CYG_REPORT_FUNCARG3( "s1=%08x, s2=%08x, lasts=%08x", s1, s2, lasts );
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186
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187 if (s1 != NULL)
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188 CYG_CHECK_DATA_PTR( s1, "s1 is not a valid pointer!" );
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189 CYG_CHECK_DATA_PTR( s2, "s2 is not a valid pointer!" );
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190 CYG_CHECK_DATA_PTR( lasts, "lasts is not a valid pointer!" );
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191
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192
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193 if (s1 == NULL && (s1 = *lasts) == NULL)
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194 {
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195 CYG_REPORT_RETVAL( NULL );
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196 return NULL;
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197 } // if
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198
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199 //
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200 // Skip (span) leading delimiters (s += strspn(s, delim), sort of).
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201 //
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202 cont:
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203 c = *s1++;
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204 for (spanp = (char *)s2; (sc = *spanp++) != 0;) {
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205 if (c == sc)
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206 goto cont;
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207 } // for
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208
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209 if (c == 0) { // no non-delimiter characters
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210 *lasts = NULL;
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211
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212 CYG_REPORT_RETVAL( NULL );
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213 return NULL;
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214 } // if
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215 tok = s1 - 1;
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216
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217 //
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218 // Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
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219 // Note that delim must have one NUL; we stop if we see that, too.
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220 //
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221 for (;;) {
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222 c = *s1++;
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223 spanp = (char *)s2;
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224 do {
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225 if ((sc = *spanp++) == c) {
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226 if (c == 0)
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227 s1 = NULL;
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228 else
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229 s1[-1] = 0;
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230 *lasts = s1;
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231
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232 CYG_REPORT_RETVAL( tok );
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233
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234 return (tok);
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235 } // if
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236 } while (sc != 0);
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237 } // for
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238 // NOTREACHED
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239 } // strtok_r()
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240
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241 // EOF strtok.cxx