1 | /* |
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2 | FUNCTION |
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3 | <<wcstoull>>, <<wcstoull_l>>---wide string to unsigned long long |
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4 | |
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5 | INDEX |
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6 | wcstoull |
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7 | |
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8 | INDEX |
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9 | wcstoull_l |
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10 | |
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11 | INDEX |
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12 | _wcstoull_r |
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13 | |
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14 | SYNOPSIS |
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15 | #include <wchar.h> |
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16 | unsigned long long wcstoull(const wchar_t *__restrict <[s]>, |
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17 | wchar_t **__restrict <[ptr]>, |
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18 | int <[base]>); |
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19 | |
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20 | #include <wchar.h> |
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21 | unsigned long long wcstoull_l(const wchar_t *__restrict <[s]>, |
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22 | wchar_t **__restrict <[ptr]>, |
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23 | int <[base]>, |
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24 | locale_t <[locale]>); |
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25 | |
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26 | unsigned long long _wcstoull_r(void *<[reent]>, const wchar_t *<[s]>, |
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27 | wchar_t **<[ptr]>, int <[base]>); |
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28 | |
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29 | DESCRIPTION |
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30 | The function <<wcstoull>> converts the wide string <<*<[s]>>> to |
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31 | an <<unsigned long long>>. First, it breaks down the string into three parts: |
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32 | leading whitespace, which is ignored; a subject string consisting |
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33 | of the digits meaningful in the radix specified by <[base]> |
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34 | (for example, <<0>> through <<7>> if the value of <[base]> is 8); |
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35 | and a trailing portion consisting of one or more unparseable characters, |
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36 | which always includes the terminating null character. Then, it attempts |
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37 | to convert the subject string into an unsigned long long integer, and returns the |
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38 | result. |
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39 | |
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40 | If the value of <[base]> is zero, the subject string is expected to look |
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41 | like a normal C integer constant: an optional sign (<<+>> or <<->>), |
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42 | a possible <<0x>> indicating hexadecimal radix or a possible <0> indicating |
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43 | octal radix, and a number. |
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44 | If <[base]> is between 2 and 36, the expected form of the subject is a |
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45 | sequence of digits (which may include letters, depending on the |
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46 | base) representing an integer in the radix specified by <[base]>. |
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47 | The letters <<a>>--<<z>> (or <<A>>--<<Z>>) are used as digits valued from |
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48 | 10 to 35. If <[base]> is 16, a leading <<0x>> is permitted. |
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49 | |
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50 | The subject sequence is the longest initial sequence of the input |
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51 | string that has the expected form, starting with the first |
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52 | non-whitespace character. If the string is empty or consists entirely |
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53 | of whitespace, or if the first non-whitespace character is not a |
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54 | permissible digit, the subject string is empty. |
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55 | |
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56 | If the subject string is acceptable, and the value of <[base]> is zero, |
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57 | <<wcstoull>> attempts to determine the radix from the input string. A |
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58 | string with a leading <<0x>> is treated as a hexadecimal value; a string with |
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59 | a leading <<0>> and no <<x>> is treated as octal; all other strings are |
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60 | treated as decimal. If <[base]> is between 2 and 36, it is used as the |
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61 | conversion radix, as described above. Finally, a pointer to the first |
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62 | character past the converted subject string is stored in <[ptr]>, if |
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63 | <[ptr]> is not <<NULL>>. |
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64 | |
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65 | If the subject string is empty (that is, if <<*>><[s]> does not start |
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66 | with a substring in acceptable form), no conversion |
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67 | is performed and the value of <[s]> is stored in <[ptr]> (if <[ptr]> is |
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68 | not <<NULL>>). |
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69 | |
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70 | The alternate function <<_wcstoull_r>> is a reentrant version. The |
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71 | extra argument <[reent]> is a pointer to a reentrancy structure. |
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72 | |
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73 | |
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74 | <<wcstoull_l>> is like <<wcstoull>> but performs the conversion based on the |
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75 | locale specified by the locale object locale. If <[locale]> is |
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76 | LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined. |
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77 | |
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78 | RETURNS |
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79 | <<wcstoull>>, <<wcstoull_l>> return <<0>> and sets <<errno>> to <<EINVAL>> |
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80 | if the value of <[base]> is not supported. |
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81 | |
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82 | <<wcstoull>>, <<wcstoull_l>> return the converted value, if any. If no |
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83 | conversion was made, <<0>> is returned. |
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84 | |
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85 | <<wcstoull>>, <<wcstoull_l>> return <<ULLONG_MAX>> if the magnitude of |
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86 | the converted value is too large, and sets <<errno>> to <<ERANGE>>. |
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87 | |
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88 | PORTABILITY |
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89 | <<wcstoull>> is ANSI. |
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90 | <<wcstoull_l>> is a GNU extension. |
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91 | |
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92 | <<wcstoull>> requires no supporting OS subroutines. |
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93 | */ |
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94 | |
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95 | /* |
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96 | * Copyright (c) 1990 Regents of the University of California. |
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97 | * All rights reserved. |
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98 | * |
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99 | * Redistribution and use in source and binary forms, with or without |
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100 | * modification, are permitted provided that the following conditions |
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101 | * are met: |
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102 | * 1. Redistributions of source code must retain the above copyright |
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103 | * notice, this list of conditions and the following disclaimer. |
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104 | * 2. Redistributions in binary form must reproduce the above copyright |
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105 | * notice, this list of conditions and the following disclaimer in the |
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106 | * documentation and/or other materials provided with the distribution. |
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107 | * 3. All advertising materials mentioning features or use of this software |
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108 | * must display the following acknowledgement: |
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109 | * This product includes software developed by the University of |
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110 | * California, Berkeley and its contributors. |
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111 | * 4. Neither the name of the University nor the names of its contributors |
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112 | * may be used to endorse or promote products derived from this software |
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113 | * without specific prior written permission. |
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114 | * |
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115 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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116 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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117 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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118 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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119 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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120 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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121 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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122 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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123 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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124 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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125 | * SUCH DAMAGE. |
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126 | */ |
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127 | |
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128 | #define _GNU_SOURCE |
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129 | #include <_ansi.h> |
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130 | #include <limits.h> |
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131 | #include <wchar.h> |
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132 | #include <wctype.h> |
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133 | #include <errno.h> |
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134 | #include <reent.h> |
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135 | #include "../locale/setlocale.h" |
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136 | |
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137 | /* Make up for older non-compliant limits.h. (This is a C99/POSIX function, |
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138 | * and both require ULLONG_MAX in limits.h.) */ |
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139 | #if !defined(ULLONG_MAX) |
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140 | # define ULLONG_MAX ULONG_LONG_MAX |
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141 | #endif |
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142 | |
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143 | /* |
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144 | * Convert a wide string to an unsigned long long integer. |
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145 | */ |
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146 | unsigned long long |
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147 | _wcstoull_l (struct _reent *rptr, const wchar_t *nptr, wchar_t **endptr, |
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148 | int base, locale_t loc) |
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149 | { |
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150 | register const wchar_t *s = nptr; |
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151 | register unsigned long long acc; |
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152 | register int c; |
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153 | register unsigned long long cutoff; |
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154 | register int neg = 0, any, cutlim; |
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155 | |
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156 | if(base < 0 || base == 1 || base > 36) { |
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157 | rptr->_errno = EINVAL; |
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158 | return(0ULL); |
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159 | } |
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160 | /* |
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161 | * See strtol for comments as to the logic used. |
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162 | */ |
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163 | do { |
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164 | c = *s++; |
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165 | } while (iswspace_l(c, loc)); |
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166 | if (c == L'-') { |
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167 | neg = 1; |
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168 | c = *s++; |
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169 | } else if (c == L'+') |
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170 | c = *s++; |
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171 | if ((base == 0 || base == 16) && |
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172 | c == L'0' && (*s == L'x' || *s == L'X')) { |
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173 | c = s[1]; |
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174 | s += 2; |
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175 | base = 16; |
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176 | } |
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177 | if (base == 0) |
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178 | base = c == L'0' ? 8 : 10; |
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179 | cutoff = (unsigned long long)ULLONG_MAX / (unsigned long long)base; |
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180 | cutlim = (unsigned long long)ULLONG_MAX % (unsigned long long)base; |
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181 | for (acc = 0, any = 0;; c = *s++) { |
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182 | if (c >= L'0' && c <= L'9') |
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183 | c -= L'0'; |
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184 | else if (c >= L'A' && c <= L'Z') |
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185 | c -= L'A' - 10; |
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186 | else if (c >= L'a' && c <= L'z') |
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187 | c -= L'a' - 10; |
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188 | else |
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189 | break; |
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190 | if (c >= base) |
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191 | break; |
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192 | if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) |
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193 | any = -1; |
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194 | else { |
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195 | any = 1; |
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196 | acc *= base; |
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197 | acc += c; |
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198 | } |
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199 | } |
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200 | if (any < 0) { |
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201 | acc = ULLONG_MAX; |
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202 | rptr->_errno = ERANGE; |
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203 | } else if (neg) |
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204 | acc = -acc; |
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205 | if (endptr != 0) |
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206 | *endptr = (wchar_t *) (any ? s - 1 : nptr); |
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207 | return (acc); |
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208 | } |
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209 | |
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210 | unsigned long long |
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211 | _wcstoull_r (struct _reent *rptr, |
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212 | const wchar_t *nptr, |
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213 | wchar_t **endptr, |
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214 | int base) |
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215 | { |
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216 | return _wcstoull_l (rptr, nptr, endptr, base, __get_current_locale ()); |
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217 | } |
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218 | |
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219 | #ifndef _REENT_ONLY |
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220 | |
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221 | unsigned long long |
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222 | wcstoull_l (const wchar_t *__restrict s, wchar_t **__restrict ptr, int base, |
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223 | locale_t loc) |
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224 | { |
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225 | return _wcstoull_l (_REENT, s, ptr, base, loc); |
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226 | } |
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227 | |
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228 | unsigned long long |
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229 | wcstoull (const wchar_t *__restrict s, |
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230 | wchar_t **__restrict ptr, |
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231 | int base) |
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232 | { |
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233 | return _wcstoull_l (_REENT, s, ptr, base, __get_current_locale ()); |
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234 | } |
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235 | |
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236 | #endif |
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