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