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3465
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1 /* Convert a string representation of time to a time value. |
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2 Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. |
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3 This file is part of the GNU C Library. |
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4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. |
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5 |
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6 The GNU C Library is free software; you can redistribute it and/or |
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7 modify it under the terms of the GNU Library General Public License as |
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8 published by the Free Software Foundation; either version 2 of the |
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9 License, or (at your option) any later version. |
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10 |
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11 The GNU C Library is distributed in the hope that it will be useful, |
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 Library General Public License for more details. |
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15 |
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16 You should have received a copy of the GNU Library General Public |
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17 License along with the GNU C Library; see the file COPYING.LIB. If not, |
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18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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19 Boston, MA 02111-1307, USA. */ |
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20 |
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21 /* XXX This version of the implementation is not really complete. |
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22 Some of the fields cannot add information alone. But if seeing |
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23 some of them in the same format (such as year, week and weekday) |
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24 this is enough information for determining the date. */ |
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25 |
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26 #ifdef HAVE_CONFIG_H |
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27 # include <config.h> |
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28 #endif |
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29 |
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30 #include <ctype.h> |
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3470
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31 #ifdef _LIBC |
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32 # include <langinfo.h> |
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33 #endif |
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3465
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34 #include <limits.h> |
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35 #include <string.h> |
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36 #include <time.h> |
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37 |
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38 #ifdef _LIBC |
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39 # include "../locale/localeinfo.h" |
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40 #endif |
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41 |
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42 |
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43 #ifndef __P |
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44 # if defined (__GNUC__) || (defined (__STDC__) && __STDC__) |
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45 # define __P(args) args |
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46 # else |
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47 # define __P(args) () |
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48 # endif /* GCC. */ |
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49 #endif /* Not __P. */ |
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50 |
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51 |
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52 #if ! HAVE_LOCALTIME_R && ! defined localtime_r |
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53 # ifdef _LIBC |
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54 # define localtime_r __localtime_r |
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55 # else |
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56 /* Approximate localtime_r as best we can in its absence. */ |
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57 # define localtime_r my_localtime_r |
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58 static struct tm *localtime_r __P ((const time_t *, struct tm *)); |
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59 static struct tm * |
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60 localtime_r (t, tp) |
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61 const time_t *t; |
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62 struct tm *tp; |
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63 { |
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64 struct tm *l = localtime (t); |
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65 if (! l) |
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66 return 0; |
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67 *tp = *l; |
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68 return tp; |
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69 } |
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70 # endif /* ! _LIBC */ |
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71 #endif /* ! HAVE_LOCALTIME_R && ! defined (localtime_r) */ |
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72 |
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73 |
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74 #define match_char(ch1, ch2) if (ch1 != ch2) return NULL |
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75 #if defined __GNUC__ && __GNUC__ >= 2 |
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76 # define match_string(cs1, s2) \ |
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77 ({ size_t len = strlen (cs1); \ |
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78 int result = strncasecmp ((cs1), (s2), len) == 0; \ |
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79 if (result) (s2) += len; \ |
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80 result; }) |
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81 #else |
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82 /* Oh come on. Get a reasonable compiler. */ |
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83 # define match_string(cs1, s2) \ |
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84 (strncasecmp ((cs1), (s2), strlen (cs1)) ? 0 : ((s2) += strlen (cs1), 1)) |
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85 #endif |
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86 /* We intentionally do not use isdigit() for testing because this will |
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87 lead to problems with the wide character version. */ |
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88 #define get_number(from, to, n) \ |
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89 do { \ |
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90 int __n = n; \ |
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91 val = 0; \ |
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92 while (*rp == ' ') \ |
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93 ++rp; \ |
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94 if (*rp < '0' || *rp > '9') \ |
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95 return NULL; \ |
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96 do { \ |
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97 val *= 10; \ |
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98 val += *rp++ - '0'; \ |
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99 } while (--__n > 0 && val * 10 <= to && *rp >= '0' && *rp <= '9'); \ |
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100 if (val < from || val > to) \ |
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101 return NULL; \ |
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102 } while (0) |
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103 #ifdef _NL_CURRENT |
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104 # define get_alt_number(from, to, n) \ |
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105 ({ \ |
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106 __label__ do_normal; \ |
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107 if (*decided != raw) \ |
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108 { \ |
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109 const char *alts = _NL_CURRENT (LC_TIME, ALT_DIGITS); \ |
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110 int __n = n; \ |
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111 int any = 0; \ |
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112 while (*rp == ' ') \ |
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113 ++rp; \ |
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114 val = 0; \ |
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115 do { \ |
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116 val *= 10; \ |
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117 while (*alts != '\0') \ |
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118 { \ |
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119 size_t len = strlen (alts); \ |
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120 if (strncasecmp (alts, rp, len) == 0) \ |
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121 break; \ |
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122 alts += len + 1; \ |
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123 ++val; \ |
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124 } \ |
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125 if (*alts == '\0') \ |
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126 { \ |
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127 if (*decided == not && ! any) \ |
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128 goto do_normal; \ |
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129 /* If we haven't read anything it's an error. */ \ |
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130 if (! any) \ |
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131 return NULL; \ |
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132 /* Correct the premature multiplication. */ \ |
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133 val /= 10; \ |
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134 break; \ |
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135 } \ |
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136 else \ |
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137 *decided = loc; \ |
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138 } while (--__n > 0 && val * 10 <= to); \ |
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139 if (val < from || val > to) \ |
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140 return NULL; \ |
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141 } \ |
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142 else \ |
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143 { \ |
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144 do_normal: \ |
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145 get_number (from, to, n); \ |
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146 } \ |
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147 0; \ |
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148 }) |
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149 #else |
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150 # define get_alt_number(from, to, n) \ |
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151 /* We don't have the alternate representation. */ \ |
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152 get_number(from, to, n) |
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153 #endif |
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154 #define recursive(new_fmt) \ |
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155 (*(new_fmt) != '\0' \ |
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156 && (rp = strptime_internal (rp, (new_fmt), tm, decided)) != NULL) |
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157 |
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158 |
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159 #ifdef _LIBC |
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160 /* This is defined in locale/C-time.c in the GNU libc. */ |
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161 extern const struct locale_data _nl_C_LC_TIME; |
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162 extern const unsigned short int __mon_yday[2][13]; |
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163 |
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164 # define weekday_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (DAY_1)].string) |
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165 # define ab_weekday_name \ |
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166 (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABDAY_1)].string) |
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167 # define month_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (MON_1)].string) |
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168 # define ab_month_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABMON_1)].string) |
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169 # define HERE_D_T_FMT (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (D_T_FMT)].string) |
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170 # define HERE_D_FMT (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (D_FMT)].string) |
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171 # define HERE_AM_STR (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (AM_STR)].string) |
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172 # define HERE_PM_STR (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (PM_STR)].string) |
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173 # define HERE_T_FMT_AMPM \ |
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174 (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (T_FMT_AMPM)].string) |
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175 # define HERE_T_FMT (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (T_FMT)].string) |
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176 |
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177 # define strncasecmp(s1, s2, n) __strncasecmp (s1, s2, n) |
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178 #else |
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179 static char const weekday_name[][10] = |
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180 { |
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181 "Sunday", "Monday", "Tuesday", "Wednesday", |
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182 "Thursday", "Friday", "Saturday" |
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183 }; |
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184 static char const ab_weekday_name[][4] = |
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185 { |
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186 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" |
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187 }; |
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188 static char const month_name[][10] = |
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189 { |
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190 "January", "February", "March", "April", "May", "June", |
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191 "July", "August", "September", "October", "November", "December" |
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192 }; |
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193 static char const ab_month_name[][4] = |
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194 { |
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195 "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
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196 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
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197 }; |
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198 # define HERE_D_T_FMT "%a %b %e %H:%M:%S %Y" |
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199 # define HERE_D_FMT "%m/%d/%y" |
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200 # define HERE_AM_STR "AM" |
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201 # define HERE_PM_STR "PM" |
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202 # define HERE_T_FMT_AMPM "%I:%M:%S %p" |
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203 # define HERE_T_FMT "%H:%M:%S" |
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204 |
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205 const unsigned short int __mon_yday[1][13] = |
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206 { |
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207 /* Normal years. */ |
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208 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, |
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209 /* Leap years. */ |
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210 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } |
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211 }; |
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212 #endif |
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213 |
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214 /* Status of lookup: do we use the locale data or the raw data? */ |
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215 enum locale_status { not, loc, raw }; |
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216 |
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217 |
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218 #ifndef __isleap |
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219 /* Nonzero if YEAR is a leap year (every 4 years, |
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220 except every 100th isn't, and every 400th is). */ |
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221 # define __isleap(year) \ |
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222 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
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223 #endif |
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224 |
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225 /* Compute the day of the week. */ |
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226 static void |
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227 day_of_the_week (struct tm *tm) |
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228 { |
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229 /* We know that January 1st 1970 was a Thursday (= 4). Compute the |
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230 the difference between this data in the one on TM and so determine |
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231 the weekday. */ |
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232 int corr_year = 1900 + tm->tm_year - (tm->tm_mon < 2); |
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233 int wday = (-473 |
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234 + (365 * (tm->tm_year - 70)) |
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235 + (corr_year / 4) |
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236 - ((corr_year / 4) / 25) + ((corr_year / 4) % 25 < 0) |
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237 + (((corr_year / 4) / 25) / 4) |
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238 + __mon_yday[0][tm->tm_mon] |
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239 + tm->tm_mday - 1); |
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240 tm->tm_wday = wday % 7; |
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241 } |
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242 |
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243 /* Compute the day of the year. */ |
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244 static void |
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245 day_of_the_year (struct tm *tm) |
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246 { |
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247 tm->tm_yday = (__mon_yday[__isleap (1900 + tm->tm_year)][tm->tm_mon] |
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248 + (tm->tm_mday - 1)); |
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249 } |
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250 |
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251 static char * |
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252 #ifdef _LIBC |
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253 internal_function |
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254 #endif |
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255 strptime_internal __P ((const char *buf, const char *format, struct tm *tm, |
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256 enum locale_status *decided)); |
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257 |
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258 static char * |
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259 #ifdef _LIBC |
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260 internal_function |
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261 #endif |
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262 strptime_internal (buf, format, tm, decided) |
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263 const char *buf; |
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264 const char *format; |
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265 struct tm *tm; |
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266 enum locale_status *decided; |
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267 { |
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268 const char *rp; |
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269 const char *fmt; |
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270 int cnt; |
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271 size_t val; |
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272 int have_I, is_pm; |
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273 int century, want_century; |
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274 int have_wday, want_xday; |
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275 int have_yday; |
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276 int have_mon, have_mday; |
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277 |
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278 rp = buf; |
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279 fmt = format; |
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280 have_I = is_pm = 0; |
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281 century = -1; |
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282 want_century = 0; |
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283 have_wday = want_xday = have_yday = have_mon = have_mday = 0; |
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284 |
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285 while (*fmt != '\0') |
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286 { |
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287 /* A white space in the format string matches 0 more or white |
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288 space in the input string. */ |
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289 if (isspace (*fmt)) |
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290 { |
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291 while (isspace (*rp)) |
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292 ++rp; |
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293 ++fmt; |
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294 continue; |
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295 } |
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296 |
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297 /* Any character but `%' must be matched by the same character |
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298 in the iput string. */ |
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299 if (*fmt != '%') |
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300 { |
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301 match_char (*fmt++, *rp++); |
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302 continue; |
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303 } |
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304 |
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305 ++fmt; |
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306 #ifndef _NL_CURRENT |
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307 /* We need this for handling the `E' modifier. */ |
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308 start_over: |
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309 #endif |
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310 switch (*fmt++) |
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311 { |
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312 case '%': |
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313 /* Match the `%' character itself. */ |
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314 match_char ('%', *rp++); |
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315 break; |
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316 case 'a': |
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317 case 'A': |
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318 /* Match day of week. */ |
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319 for (cnt = 0; cnt < 7; ++cnt) |
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320 { |
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321 #ifdef _NL_CURRENT |
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322 if (*decided !=raw) |
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323 { |
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324 if (match_string (_NL_CURRENT (LC_TIME, DAY_1 + cnt), rp)) |
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325 { |
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326 if (*decided == not |
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327 && strcmp (_NL_CURRENT (LC_TIME, DAY_1 + cnt), |
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328 weekday_name[cnt])) |
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329 *decided = loc; |
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330 break; |
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331 } |
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332 if (match_string (_NL_CURRENT (LC_TIME, ABDAY_1 + cnt), rp)) |
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333 { |
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334 if (*decided == not |
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335 && strcmp (_NL_CURRENT (LC_TIME, ABDAY_1 + cnt), |
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336 ab_weekday_name[cnt])) |
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337 *decided = loc; |
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338 break; |
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339 } |
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340 } |
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341 #endif |
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342 if (*decided != loc |
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343 && (match_string (weekday_name[cnt], rp) |
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344 || match_string (ab_weekday_name[cnt], rp))) |
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345 { |
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346 *decided = raw; |
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347 break; |
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348 } |
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349 } |
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350 if (cnt == 7) |
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351 /* Does not match a weekday name. */ |
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352 return NULL; |
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353 tm->tm_wday = cnt; |
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354 have_wday = 1; |
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355 break; |
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356 case 'b': |
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357 case 'B': |
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358 case 'h': |
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359 /* Match month name. */ |
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360 for (cnt = 0; cnt < 12; ++cnt) |
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361 { |
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362 #ifdef _NL_CURRENT |
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363 if (*decided !=raw) |
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364 { |
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365 if (match_string (_NL_CURRENT (LC_TIME, MON_1 + cnt), rp)) |
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366 { |
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367 if (*decided == not |
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368 && strcmp (_NL_CURRENT (LC_TIME, MON_1 + cnt), |
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369 month_name[cnt])) |
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370 *decided = loc; |
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371 break; |
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372 } |
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373 if (match_string (_NL_CURRENT (LC_TIME, ABMON_1 + cnt), rp)) |
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374 { |
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375 if (*decided == not |
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376 && strcmp (_NL_CURRENT (LC_TIME, ABMON_1 + cnt), |
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377 ab_month_name[cnt])) |
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378 *decided = loc; |
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379 break; |
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380 } |
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381 } |
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382 #endif |
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383 if (match_string (month_name[cnt], rp) |
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384 || match_string (ab_month_name[cnt], rp)) |
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385 { |
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386 *decided = raw; |
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387 break; |
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388 } |
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389 } |
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390 if (cnt == 12) |
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391 /* Does not match a month name. */ |
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392 return NULL; |
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393 tm->tm_mon = cnt; |
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394 want_xday = 1; |
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395 break; |
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396 case 'c': |
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397 /* Match locale's date and time format. */ |
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398 #ifdef _NL_CURRENT |
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399 if (*decided != raw) |
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400 { |
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401 if (!recursive (_NL_CURRENT (LC_TIME, D_T_FMT))) |
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402 { |
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403 if (*decided == loc) |
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404 return NULL; |
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405 } |
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406 else |
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407 { |
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408 if (*decided == not && |
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409 strcmp (_NL_CURRENT (LC_TIME, D_T_FMT), HERE_D_T_FMT)) |
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410 *decided = loc; |
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411 want_xday = 1; |
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412 break; |
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413 } |
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414 *decided = raw; |
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415 } |
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416 #endif |
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417 if (!recursive (HERE_D_T_FMT)) |
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418 return NULL; |
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419 want_xday = 1; |
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420 break; |
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421 case 'C': |
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422 /* Match century number. */ |
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423 get_number (0, 99, 2); |
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424 century = val; |
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425 want_xday = 1; |
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426 break; |
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427 case 'd': |
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428 case 'e': |
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429 /* Match day of month. */ |
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430 get_number (1, 31, 2); |
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431 tm->tm_mday = val; |
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432 have_mday = 1; |
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433 want_xday = 1; |
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434 break; |
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435 case 'F': |
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436 if (!recursive ("%Y-%m-%d")) |
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437 return NULL; |
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438 want_xday = 1; |
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439 break; |
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440 case 'x': |
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441 #ifdef _NL_CURRENT |
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442 if (*decided != raw) |
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443 { |
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444 if (!recursive (_NL_CURRENT (LC_TIME, D_FMT))) |
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445 { |
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446 if (*decided == loc) |
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447 return NULL; |
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448 } |
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449 else |
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450 { |
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451 if (decided == not |
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452 && strcmp (_NL_CURRENT (LC_TIME, D_FMT), HERE_D_FMT)) |
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453 *decided = loc; |
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454 want_xday = 1; |
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455 break; |
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456 } |
|
|
457 *decided = raw; |
|
|
458 } |
|
|
459 #endif |
|
|
460 /* Fall through. */ |
|
|
461 case 'D': |
|
|
462 /* Match standard day format. */ |
|
|
463 if (!recursive (HERE_D_FMT)) |
|
|
464 return NULL; |
|
|
465 want_xday = 1; |
|
|
466 break; |
|
|
467 case 'k': |
|
|
468 case 'H': |
|
|
469 /* Match hour in 24-hour clock. */ |
|
|
470 get_number (0, 23, 2); |
|
|
471 tm->tm_hour = val; |
|
|
472 have_I = 0; |
|
|
473 break; |
|
|
474 case 'I': |
|
|
475 /* Match hour in 12-hour clock. */ |
|
|
476 get_number (1, 12, 2); |
|
|
477 tm->tm_hour = val % 12; |
|
|
478 have_I = 1; |
|
|
479 break; |
|
|
480 case 'j': |
|
|
481 /* Match day number of year. */ |
|
|
482 get_number (1, 366, 3); |
|
|
483 tm->tm_yday = val - 1; |
|
|
484 have_yday = 1; |
|
|
485 break; |
|
|
486 case 'm': |
|
|
487 /* Match number of month. */ |
|
|
488 get_number (1, 12, 2); |
|
|
489 tm->tm_mon = val - 1; |
|
|
490 have_mon = 1; |
|
|
491 want_xday = 1; |
|
|
492 break; |
|
|
493 case 'M': |
|
|
494 /* Match minute. */ |
|
|
495 get_number (0, 59, 2); |
|
|
496 tm->tm_min = val; |
|
|
497 break; |
|
|
498 case 'n': |
|
|
499 case 't': |
|
|
500 /* Match any white space. */ |
|
|
501 while (isspace (*rp)) |
|
|
502 ++rp; |
|
|
503 break; |
|
|
504 case 'p': |
|
|
505 /* Match locale's equivalent of AM/PM. */ |
|
|
506 #ifdef _NL_CURRENT |
|
|
507 if (*decided != raw) |
|
|
508 { |
|
|
509 if (match_string (_NL_CURRENT (LC_TIME, AM_STR), rp)) |
|
|
510 { |
|
|
511 if (strcmp (_NL_CURRENT (LC_TIME, AM_STR), HERE_AM_STR)) |
|
|
512 *decided = loc; |
|
|
513 break; |
|
|
514 } |
|
|
515 if (match_string (_NL_CURRENT (LC_TIME, PM_STR), rp)) |
|
|
516 { |
|
|
517 if (strcmp (_NL_CURRENT (LC_TIME, PM_STR), HERE_PM_STR)) |
|
|
518 *decided = loc; |
|
|
519 is_pm = 1; |
|
|
520 break; |
|
|
521 } |
|
|
522 *decided = raw; |
|
|
523 } |
|
|
524 #endif |
|
|
525 if (!match_string (HERE_AM_STR, rp)) |
|
|
526 if (match_string (HERE_PM_STR, rp)) |
|
|
527 is_pm = 1; |
|
|
528 else |
|
|
529 return NULL; |
|
|
530 break; |
|
|
531 case 'r': |
|
|
532 #ifdef _NL_CURRENT |
|
|
533 if (*decided != raw) |
|
|
534 { |
|
|
535 if (!recursive (_NL_CURRENT (LC_TIME, T_FMT_AMPM))) |
|
|
536 { |
|
|
537 if (*decided == loc) |
|
|
538 return NULL; |
|
|
539 } |
|
|
540 else |
|
|
541 { |
|
|
542 if (*decided == not && |
|
|
543 strcmp (_NL_CURRENT (LC_TIME, T_FMT_AMPM), |
|
|
544 HERE_T_FMT_AMPM)) |
|
|
545 *decided = loc; |
|
|
546 break; |
|
|
547 } |
|
|
548 *decided = raw; |
|
|
549 } |
|
|
550 #endif |
|
|
551 if (!recursive (HERE_T_FMT_AMPM)) |
|
|
552 return NULL; |
|
|
553 break; |
|
|
554 case 'R': |
|
|
555 if (!recursive ("%H:%M")) |
|
|
556 return NULL; |
|
|
557 break; |
|
|
558 case 's': |
|
|
559 { |
|
|
560 /* The number of seconds may be very high so we cannot use |
|
|
561 the `get_number' macro. Instead read the number |
|
|
562 character for character and construct the result while |
|
|
563 doing this. */ |
|
|
564 time_t secs = 0; |
|
|
565 if (*rp < '0' || *rp > '9') |
|
|
566 /* We need at least one digit. */ |
|
|
567 return NULL; |
|
|
568 |
|
|
569 do |
|
|
570 { |
|
|
571 secs *= 10; |
|
|
572 secs += *rp++ - '0'; |
|
|
573 } |
|
|
574 while (*rp >= '0' && *rp <= '9'); |
|
|
575 |
|
|
576 if (localtime_r (&secs, tm) == NULL) |
|
|
577 /* Error in function. */ |
|
|
578 return NULL; |
|
|
579 } |
|
|
580 break; |
|
|
581 case 'S': |
|
|
582 get_number (0, 61, 2); |
|
|
583 tm->tm_sec = val; |
|
|
584 break; |
|
|
585 case 'X': |
|
|
586 #ifdef _NL_CURRENT |
|
|
587 if (*decided != raw) |
|
|
588 { |
|
|
589 if (!recursive (_NL_CURRENT (LC_TIME, T_FMT))) |
|
|
590 { |
|
|
591 if (*decided == loc) |
|
|
592 return NULL; |
|
|
593 } |
|
|
594 else |
|
|
595 { |
|
|
596 if (strcmp (_NL_CURRENT (LC_TIME, T_FMT), HERE_T_FMT)) |
|
|
597 *decided = loc; |
|
|
598 break; |
|
|
599 } |
|
|
600 *decided = raw; |
|
|
601 } |
|
|
602 #endif |
|
|
603 /* Fall through. */ |
|
|
604 case 'T': |
|
|
605 if (!recursive (HERE_T_FMT)) |
|
|
606 return NULL; |
|
|
607 break; |
|
|
608 case 'u': |
|
|
609 get_number (1, 7, 1); |
|
|
610 tm->tm_wday = val % 7; |
|
|
611 have_wday = 1; |
|
|
612 break; |
|
|
613 case 'g': |
|
|
614 get_number (0, 99, 2); |
|
|
615 /* XXX This cannot determine any field in TM. */ |
|
|
616 break; |
|
|
617 case 'G': |
|
|
618 if (*rp < '0' || *rp > '9') |
|
|
619 return NULL; |
|
|
620 /* XXX Ignore the number since we would need some more |
|
|
621 information to compute a real date. */ |
|
|
622 do |
|
|
623 ++rp; |
|
|
624 while (*rp >= '0' && *rp <= '9'); |
|
|
625 break; |
|
|
626 case 'U': |
|
|
627 case 'V': |
|
|
628 case 'W': |
|
|
629 get_number (0, 53, 2); |
|
|
630 /* XXX This cannot determine any field in TM without some |
|
|
631 information. */ |
|
|
632 break; |
|
|
633 case 'w': |
|
|
634 /* Match number of weekday. */ |
|
|
635 get_number (0, 6, 1); |
|
|
636 tm->tm_wday = val; |
|
|
637 have_wday = 1; |
|
|
638 break; |
|
|
639 case 'y': |
|
|
640 /* Match year within century. */ |
|
|
641 get_number (0, 99, 2); |
|
|
642 /* The "Year 2000: The Millennium Rollover" paper suggests that |
|
|
643 values in the range 69-99 refer to the twentieth century. */ |
|
|
644 tm->tm_year = val >= 69 ? val : val + 100; |
|
|
645 /* Indicate that we want to use the century, if specified. */ |
|
|
646 want_century = 1; |
|
|
647 want_xday = 1; |
|
|
648 break; |
|
|
649 case 'Y': |
|
|
650 /* Match year including century number. */ |
|
|
651 get_number (0, 9999, 4); |
|
|
652 tm->tm_year = val - 1900; |
|
|
653 want_century = 0; |
|
|
654 want_xday = 1; |
|
|
655 break; |
|
|
656 case 'Z': |
|
|
657 /* XXX How to handle this? */ |
|
|
658 break; |
|
|
659 case 'E': |
|
|
660 #ifdef _NL_CURRENT |
|
|
661 switch (*fmt++) |
|
|
662 { |
|
|
663 case 'c': |
|
|
664 /* Match locale's alternate date and time format. */ |
|
|
665 if (*decided != raw) |
|
|
666 { |
|
|
667 const char *fmt = _NL_CURRENT (LC_TIME, ERA_D_T_FMT); |
|
|
668 |
|
|
669 if (*fmt == '\0') |
|
|
670 fmt = _NL_CURRENT (LC_TIME, D_T_FMT); |
|
|
671 |
|
|
672 if (!recursive (fmt)) |
|
|
673 { |
|
|
674 if (*decided == loc) |
|
|
675 return NULL; |
|
|
676 } |
|
|
677 else |
|
|
678 { |
|
|
679 if (strcmp (fmt, HERE_D_T_FMT)) |
|
|
680 *decided = loc; |
|
|
681 want_xday = 1; |
|
|
682 break; |
|
|
683 } |
|
|
684 *decided = raw; |
|
|
685 } |
|
|
686 /* The C locale has no era information, so use the |
|
|
687 normal representation. */ |
|
|
688 if (!recursive (HERE_D_T_FMT)) |
|
|
689 return NULL; |
|
|
690 want_xday = 1; |
|
|
691 break; |
|
|
692 case 'C': |
|
|
693 case 'y': |
|
|
694 case 'Y': |
|
|
695 /* Match name of base year in locale's alternate |
|
|
696 representation. */ |
|
|
697 /* XXX This is currently not implemented. It should |
|
|
698 use the value _NL_CURRENT (LC_TIME, ERA). */ |
|
|
699 break; |
|
|
700 case 'x': |
|
|
701 if (*decided != raw) |
|
|
702 { |
|
|
703 const char *fmt = _NL_CURRENT (LC_TIME, ERA_D_FMT); |
|
|
704 |
|
|
705 if (*fmt == '\0') |
|
|
706 fmt = _NL_CURRENT (LC_TIME, D_FMT); |
|
|
707 |
|
|
708 if (!recursive (fmt)) |
|
|
709 { |
|
|
710 if (*decided == loc) |
|
|
711 return NULL; |
|
|
712 } |
|
|
713 else |
|
|
714 { |
|
|
715 if (strcmp (fmt, HERE_D_FMT)) |
|
|
716 *decided = loc; |
|
|
717 break; |
|
|
718 } |
|
|
719 *decided = raw; |
|
|
720 } |
|
|
721 if (!recursive (HERE_D_FMT)) |
|
|
722 return NULL; |
|
|
723 break; |
|
|
724 case 'X': |
|
|
725 if (*decided != raw) |
|
|
726 { |
|
|
727 const char *fmt = _NL_CURRENT (LC_TIME, ERA_T_FMT); |
|
|
728 |
|
|
729 if (*fmt == '\0') |
|
|
730 fmt = _NL_CURRENT (LC_TIME, T_FMT); |
|
|
731 |
|
|
732 if (!recursive (fmt)) |
|
|
733 { |
|
|
734 if (*decided == loc) |
|
|
735 return NULL; |
|
|
736 } |
|
|
737 else |
|
|
738 { |
|
|
739 if (strcmp (fmt, HERE_T_FMT)) |
|
|
740 *decided = loc; |
|
|
741 break; |
|
|
742 } |
|
|
743 *decided = raw; |
|
|
744 } |
|
|
745 if (!recursive (HERE_T_FMT)) |
|
|
746 return NULL; |
|
|
747 break; |
|
|
748 default: |
|
|
749 return NULL; |
|
|
750 } |
|
|
751 break; |
|
|
752 #else |
|
|
753 /* We have no information about the era format. Just use |
|
|
754 the normal format. */ |
|
|
755 if (*fmt != 'c' && *fmt != 'C' && *fmt != 'y' && *fmt != 'Y' |
|
|
756 && *fmt != 'x' && *fmt != 'X') |
|
|
757 /* This is an illegal format. */ |
|
|
758 return NULL; |
|
|
759 |
|
|
760 goto start_over; |
|
|
761 #endif |
|
|
762 case 'O': |
|
|
763 switch (*fmt++) |
|
|
764 { |
|
|
765 case 'd': |
|
|
766 case 'e': |
|
|
767 /* Match day of month using alternate numeric symbols. */ |
|
|
768 get_alt_number (1, 31, 2); |
|
|
769 tm->tm_mday = val; |
|
|
770 have_mday = 1; |
|
|
771 want_xday = 1; |
|
|
772 break; |
|
|
773 case 'H': |
|
|
774 /* Match hour in 24-hour clock using alternate numeric |
|
|
775 symbols. */ |
|
|
776 get_alt_number (0, 23, 2); |
|
|
777 tm->tm_hour = val; |
|
|
778 have_I = 0; |
|
|
779 break; |
|
|
780 case 'I': |
|
|
781 /* Match hour in 12-hour clock using alternate numeric |
|
|
782 symbols. */ |
|
|
783 get_alt_number (1, 12, 2); |
|
|
784 tm->tm_hour = val - 1; |
|
|
785 have_I = 1; |
|
|
786 break; |
|
|
787 case 'm': |
|
|
788 /* Match month using alternate numeric symbols. */ |
|
|
789 get_alt_number (1, 12, 2); |
|
|
790 tm->tm_mon = val - 1; |
|
|
791 have_mon = 1; |
|
|
792 want_xday = 1; |
|
|
793 break; |
|
|
794 case 'M': |
|
|
795 /* Match minutes using alternate numeric symbols. */ |
|
|
796 get_alt_number (0, 59, 2); |
|
|
797 tm->tm_min = val; |
|
|
798 break; |
|
|
799 case 'S': |
|
|
800 /* Match seconds using alternate numeric symbols. */ |
|
|
801 get_alt_number (0, 61, 2); |
|
|
802 tm->tm_sec = val; |
|
|
803 break; |
|
|
804 case 'U': |
|
|
805 case 'V': |
|
|
806 case 'W': |
|
|
807 get_alt_number (0, 53, 2); |
|
|
808 /* XXX This cannot determine any field in TM without |
|
|
809 further information. */ |
|
|
810 break; |
|
|
811 case 'w': |
|
|
812 /* Match number of weekday using alternate numeric symbols. */ |
|
|
813 get_alt_number (0, 6, 1); |
|
|
814 tm->tm_wday = val; |
|
|
815 have_wday = 1; |
|
|
816 break; |
|
|
817 case 'y': |
|
|
818 /* Match year within century using alternate numeric symbols. */ |
|
|
819 get_alt_number (0, 99, 2); |
|
|
820 tm->tm_year = val >= 69 ? val : val + 100; |
|
|
821 want_xday = 1; |
|
|
822 break; |
|
|
823 default: |
|
|
824 return NULL; |
|
|
825 } |
|
|
826 break; |
|
|
827 default: |
|
|
828 return NULL; |
|
|
829 } |
|
|
830 } |
|
|
831 |
|
|
832 if (have_I && is_pm) |
|
|
833 tm->tm_hour += 12; |
|
|
834 |
|
|
835 if (want_century && century != -1) |
|
|
836 tm->tm_year = tm->tm_year % 100 + (century - 19) * 100; |
|
|
837 |
|
|
838 if (want_xday && !have_wday) { |
|
|
839 if ( !(have_mon && have_mday) && have_yday) { |
|
|
840 /* we don't have tm_mon and/or tm_mday, compute them */ |
|
|
841 int t_mon = 0; |
|
|
842 while (__mon_yday[__isleap(1900 + tm->tm_year)][t_mon] <= tm->tm_yday) |
|
|
843 t_mon++; |
|
|
844 if (!have_mon) |
|
|
845 tm->tm_mon = t_mon - 1; |
|
|
846 if (!have_mday) |
|
|
847 tm->tm_mday = tm->tm_yday - __mon_yday[__isleap(1900 + tm->tm_year)][t_mon - 1] + 1; |
|
|
848 } |
|
|
849 day_of_the_week (tm); |
|
|
850 } |
|
|
851 if (want_xday && !have_yday) |
|
|
852 day_of_the_year (tm); |
|
|
853 |
|
|
854 return (char *) rp; |
|
|
855 } |
|
|
856 |
|
|
857 |
|
|
858 char * |
|
|
859 strptime (buf, format, tm) |
|
|
860 const char *buf; |
|
|
861 const char *format; |
|
|
862 struct tm *tm; |
|
|
863 { |
|
|
864 enum locale_status decided; |
|
|
865 #ifdef _NL_CURRENT |
|
|
866 decided = not; |
|
|
867 #else |
|
|
868 decided = raw; |
|
|
869 #endif |
|
|
870 return strptime_internal (buf, format, tm, &decided); |
|
|
871 } |
