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annotate packages/language/c/libc/stdlib/current/src/strtoul.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 // strtoul.cxx
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4 //
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5 // ISO standard string to long int conversion function defined in
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6 // section 7.10.1.6 of the standard
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7 //
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8 //===========================================================================
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9 // ####ECOSGPLCOPYRIGHTBEGIN####
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10 // -------------------------------------------
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11 // This file is part of eCos, the Embedded Configurable Operating System.
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12 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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13 //
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14 // eCos is free software; you can redistribute it and/or modify it under
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15 // the terms of the GNU General Public License as published by the Free
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16 // Software Foundation; either version 2 or (at your option) any later
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17 // version.
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18 //
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19 // eCos is distributed in the hope that it will be useful, but WITHOUT
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20 // ANY 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
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25 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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26 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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27 //
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28 // As a special exception, if other files instantiate templates or use
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29 // macros or inline functions from this file, or you compile this file
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30 // and link it with other works to produce a work based on this file,
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31 // this file does not by itself cause the resulting work to be covered by
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32 // the GNU General Public License. However the source code for this file
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33 // must still be made available in accordance with section (3) of the GNU
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34 // General Public License v2.
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35 //
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36 // This exception does not invalidate any other reasons why a work based
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37 // on this file might be covered by the GNU General Public License.
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38 // -------------------------------------------
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39 // ####ECOSGPLCOPYRIGHTEND####
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40 //===========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): jlarmour
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44 // Contributors:
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45 // Date: 2000-04-30
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46 // Purpose:
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47 // Description:
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48 // Usage:
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49 //
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50 //####DESCRIPTIONEND####
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51 //
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52 //===========================================================================
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53 //
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54 // This code is based on original code with the following copyright:
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55 //
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56 /*
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57 * Copyright (c) 1990 Regents of the University of California.
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58 * All rights reserved.
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59 *
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60 * Redistribution and use in source and binary forms, with or without
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61 * modification, are permitted provided that the following conditions
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62 * are met:
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63 * 1. Redistributions of source code must retain the above copyright
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64 * notice, this list of conditions and the following disclaimer.
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65 * 2. Redistributions in binary form must reproduce the above copyright
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66 * notice, this list of conditions and the following disclaimer in the
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67 * documentation and/or other materials provided with the distribution.
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68 * 3. Neither the name of the University nor the names of its contributors
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69 * may be used to endorse or promote products derived from this software
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70 * without specific prior written permission.
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71 *
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72 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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73 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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74 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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75 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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76 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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77 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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78 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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79 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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80 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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81 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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82 * SUCH DAMAGE.
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83 */
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84
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85
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86 // CONFIGURATION
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87
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88 #include <pkgconf/libc_stdlib.h> // Configuration header
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89
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90 // INCLUDES
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91
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92 #include <cyg/infra/cyg_type.h> // Common type definitions and support
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93 #include <cyg/infra/cyg_trac.h> // Tracing support
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94 #include <cyg/infra/cyg_ass.h> // Assertion support
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95 #include <limits.h> // Definition of ULONG_MAX
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96 #include <ctype.h> // Definition of many ctype functions
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97 #include <errno.h> // Error code definitions
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98 #include <stdlib.h> // Header for all stdlib functions
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99 // (like this one)
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100
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101
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102 // FUNCTIONS
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103
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104 //
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105 // Convert a string to an unsigned long integer.
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106 //
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107 // Ignores `locale' stuff. Assumes that the upper and lower case
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108 // alphabets and digits are each contiguous.
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109 //
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110
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111 unsigned long
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112 strtoul( const char *nptr, char **endptr, int base )
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113 {
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114 const char *s = nptr;
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115 unsigned long acc;
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116 int c;
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117 unsigned long cutoff;
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118 int neg = 0, any, cutlim;
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119
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120 CYG_REPORT_FUNCNAMETYPE( "strtoul", "returning long %d" );
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121 CYG_REPORT_FUNCARG3( "nptr=%08x, endptr=%08x, base=%d",
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122 nptr, endptr, base );
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123 CYG_CHECK_DATA_PTR( nptr, "nptr is not a valid pointer!" );
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124
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125 if (endptr != NULL)
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126 CYG_CHECK_DATA_PTR( endptr, "endptr is not a valid pointer!" );
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127 //
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128 // See strtol for comments as to the logic used.
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129 //
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130 do {
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131 c = *s++;
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132 } while (isspace(c));
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133 if (c == '-') {
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134 neg = 1;
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135 c = *s++;
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136 } else if (c == '+')
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137 c = *s++;
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138 if ((base == 0 || base == 16) &&
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139 c == '0' && (*s == 'x' || *s == 'X')) {
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140 c = s[1];
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141 s += 2;
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142 base = 16;
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143 }
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144 if (base == 0)
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145 base = c == '0' ? 8 : 10;
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146 cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
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147 cutlim = (unsigned long)ULONG_MAX % (unsigned long)base;
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148 for (acc = 0, any = 0;; c = *s++) {
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149 if (isdigit(c))
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150 c -= '0';
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151 else if (isalpha(c))
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152 c -= isupper(c) ? 'A' - 10 : 'a' - 10;
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153 else
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154 break;
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155 if (c >= base)
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156 break;
2705
878e0f9373cf * src/strtoull.cxx, src/strtoll.cxx, src/strtoul.cxx, src/strtoul.cxx:
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157 if ((any < 0) || (acc > cutoff) || ((acc == cutoff) && (c > cutlim)))
115
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158 any = -1;
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159 else {
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160 any = 1;
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161 acc *= base;
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162 acc += c;
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163 }
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164 }
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165 if (any < 0) {
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166 acc = ULONG_MAX;
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167 errno = ERANGE;
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168 } else if (neg)
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169 acc = -acc;
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170 if (endptr != 0)
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171 *endptr = (char *) (any ? s - 1 : nptr);
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172
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173 CYG_REPORT_RETVAL( acc );
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174
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175 return acc;
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176 } // strtoul()
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177
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178 // EOF strtoul.cxx