Mercurial > hg > octave-kai > gnulib-hg
annotate lib/getdate.y @ 909:eb2bf291bb4c
s/;/. in comment to placate francois
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Thu, 10 Apr 1997 03:46:01 +0000 |
| parents | e40500db9101 |
| children | 66e219181392 |
| rev | line source |
|---|---|
| 9 | 1 %{ |
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2 /* |
| 9 | 3 ** Originally written by Steven M. Bellovin <smb@research.att.com> while |
| 4 ** at the University of North Carolina at Chapel Hill. Later tweaked by | |
| 5 ** a couple of people on Usenet. Completely overhauled by Rich $alz | |
|
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6 ** <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990. |
| 9 | 7 ** |
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8 ** This grammar has 13 shift/reduce conflicts. |
| 9 | 9 ** |
| 10 ** This code is in the public domain and has no copyright. | |
| 11 */ | |
| 12 | |
| 48 | 13 #ifdef HAVE_CONFIG_H |
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14 # include <config.h> |
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15 # ifdef FORCE_ALLOCA_H |
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16 # include <alloca.h> |
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17 # endif |
| 101 | 18 #endif |
| 48 | 19 |
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20 /* Since the code of getdate.y is not included in the Emacs executable |
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21 itself, there is no need to #define static in this file. Even if |
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22 the code were included in the Emacs executable, it probably |
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23 wouldn't do any harm to #undef it here; this will only cause |
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24 problems if we try to write to a static variable, which I don't |
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25 think this code needs to do. */ |
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26 #ifdef emacs |
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27 # undef static |
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28 #endif |
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29 |
| 9 | 30 #include <stdio.h> |
| 31 #include <ctype.h> | |
| 32 | |
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33 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII)) |
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34 # define IN_CTYPE_DOMAIN(c) 1 |
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35 #else |
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36 # define IN_CTYPE_DOMAIN(c) isascii(c) |
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37 #endif |
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38 |
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39 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c)) |
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40 #define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c)) |
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41 #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c)) |
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42 #define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c)) |
| 814 | 43 |
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44 /* ISDIGIT differs from ISDIGIT_LOCALE, as follows: |
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45 - Its arg may be any int or unsigned int; it need not be an unsigned char. |
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46 - It's guaranteed to evaluate its argument exactly once. |
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47 - It's typically faster. |
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48 Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that |
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49 only '0' through '9' are digits. Prefer ISDIGIT to ISDIGIT_LOCALE unless |
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50 it's important to use the locale's definition of `digit' even when the |
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51 host does not conform to Posix. */ |
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52 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9) |
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53 |
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54 #include "getdate.h" |
| 9 | 55 |
| 56 #if defined (STDC_HEADERS) || defined (USG) | |
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57 # include <string.h> |
| 9 | 58 #endif |
| 59 | |
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60 /* Some old versions of bison generate parsers that use bcopy. |
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61 That loses on systems that don't provide the function, so we have |
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62 to redefine it here. */ |
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63 #if !defined (HAVE_BCOPY) && defined (HAVE_MEMCPY) && !defined (bcopy) |
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64 # define bcopy(from, to, len) memcpy ((to), (from), (len)) |
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65 #endif |
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66 |
| 303 | 67 extern struct tm *gmtime (); |
| 68 extern struct tm *localtime (); | |
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69 extern time_t mktime (); |
| 9 | 70 |
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71 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc), |
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72 as well as gratuitiously global symbol names, so we can have multiple |
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73 yacc generated parsers in the same program. Note that these are only |
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74 the variables produced by yacc. If other parser generators (bison, |
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75 byacc, etc) produce additional global names that conflict at link time, |
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76 then those parser generators need to be fixed instead of adding those |
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77 names to this list. */ |
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78 |
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79 #define yymaxdepth gd_maxdepth |
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80 #define yyparse gd_parse |
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81 #define yylex gd_lex |
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82 #define yyerror gd_error |
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83 #define yylval gd_lval |
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84 #define yychar gd_char |
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85 #define yydebug gd_debug |
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86 #define yypact gd_pact |
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87 #define yyr1 gd_r1 |
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88 #define yyr2 gd_r2 |
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89 #define yydef gd_def |
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90 #define yychk gd_chk |
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91 #define yypgo gd_pgo |
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92 #define yyact gd_act |
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93 #define yyexca gd_exca |
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94 #define yyerrflag gd_errflag |
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95 #define yynerrs gd_nerrs |
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96 #define yyps gd_ps |
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97 #define yypv gd_pv |
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98 #define yys gd_s |
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99 #define yy_yys gd_yys |
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100 #define yystate gd_state |
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101 #define yytmp gd_tmp |
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102 #define yyv gd_v |
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103 #define yy_yyv gd_yyv |
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104 #define yyval gd_val |
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105 #define yylloc gd_lloc |
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106 #define yyreds gd_reds /* With YYDEBUG defined */ |
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107 #define yytoks gd_toks /* With YYDEBUG defined */ |
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108 #define yylhs gd_yylhs |
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109 #define yylen gd_yylen |
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110 #define yydefred gd_yydefred |
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111 #define yydgoto gd_yydgoto |
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112 #define yysindex gd_yysindex |
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113 #define yyrindex gd_yyrindex |
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114 #define yygindex gd_yygindex |
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115 #define yytable gd_yytable |
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116 #define yycheck gd_yycheck |
| 9 | 117 |
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118 static int yylex (); |
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119 static int yyerror (); |
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120 |
| 9 | 121 #define EPOCH 1970 |
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122 #define HOUR(x) ((x) * 60) |
| 9 | 123 |
| 303 | 124 #define MAX_BUFF_LEN 128 /* size of buffer to read the date into */ |
| 9 | 125 |
| 126 /* | |
| 127 ** An entry in the lexical lookup table. | |
| 128 */ | |
| 129 typedef struct _TABLE { | |
| 304 | 130 const char *name; |
| 9 | 131 int type; |
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132 int value; |
| 9 | 133 } TABLE; |
| 134 | |
| 135 | |
| 136 /* | |
| 137 ** Meridian: am, pm, or 24-hour style. | |
| 138 */ | |
| 139 typedef enum _MERIDIAN { | |
| 140 MERam, MERpm, MER24 | |
| 141 } MERIDIAN; | |
| 142 | |
| 143 | |
| 144 /* | |
| 145 ** Global variables. We could get rid of most of these by using a good | |
| 146 ** union as the yacc stack. (This routine was originally written before | |
| 147 ** yacc had the %union construct.) Maybe someday; right now we only use | |
| 148 ** the %union very rarely. | |
| 149 */ | |
|
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150 static const char *yyInput; |
|
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151 static int yyDayOrdinal; |
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152 static int yyDayNumber; |
| 9 | 153 static int yyHaveDate; |
| 154 static int yyHaveDay; | |
| 155 static int yyHaveRel; | |
| 156 static int yyHaveTime; | |
| 157 static int yyHaveZone; | |
|
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158 static int yyTimezone; |
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159 static int yyDay; |
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160 static int yyHour; |
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161 static int yyMinutes; |
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162 static int yyMonth; |
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163 static int yySeconds; |
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164 static int yyYear; |
| 9 | 165 static MERIDIAN yyMeridian; |
|
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166 static int yyRelDay; |
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167 static int yyRelHour; |
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168 static int yyRelMinutes; |
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169 static int yyRelMonth; |
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170 static int yyRelSeconds; |
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171 static int yyRelYear; |
| 9 | 172 |
| 173 %} | |
| 174 | |
| 175 %union { | |
|
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176 int Number; |
| 9 | 177 enum _MERIDIAN Meridian; |
| 178 } | |
| 179 | |
|
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180 %token tAGO tDAY tDAY_UNIT tDAYZONE tDST tHOUR_UNIT tID |
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181 %token tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT |
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182 %token tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE |
| 9 | 183 |
|
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184 %type <Number> tDAY tDAY_UNIT tDAYZONE tHOUR_UNIT tMINUTE_UNIT |
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185 %type <Number> tMONTH tMONTH_UNIT |
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186 %type <Number> tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE |
| 9 | 187 %type <Meridian> tMERIDIAN o_merid |
| 188 | |
| 189 %% | |
| 190 | |
| 191 spec : /* NULL */ | |
| 192 | spec item | |
| 193 ; | |
| 194 | |
| 195 item : time { | |
| 196 yyHaveTime++; | |
| 197 } | |
| 198 | zone { | |
| 199 yyHaveZone++; | |
| 200 } | |
| 201 | date { | |
| 202 yyHaveDate++; | |
| 203 } | |
| 204 | day { | |
| 205 yyHaveDay++; | |
| 206 } | |
| 207 | rel { | |
| 208 yyHaveRel++; | |
| 209 } | |
| 210 | number | |
| 211 ; | |
| 212 | |
| 213 time : tUNUMBER tMERIDIAN { | |
| 214 yyHour = $1; | |
| 215 yyMinutes = 0; | |
| 216 yySeconds = 0; | |
| 217 yyMeridian = $2; | |
| 218 } | |
| 219 | tUNUMBER ':' tUNUMBER o_merid { | |
| 220 yyHour = $1; | |
| 221 yyMinutes = $3; | |
| 222 yySeconds = 0; | |
| 223 yyMeridian = $4; | |
| 224 } | |
| 225 | tUNUMBER ':' tUNUMBER tSNUMBER { | |
| 226 yyHour = $1; | |
| 227 yyMinutes = $3; | |
| 228 yyMeridian = MER24; | |
|
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229 yyHaveZone++; |
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230 yyTimezone = ($4 < 0 |
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231 ? -$4 % 100 + (-$4 / 100) * 60 |
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232 : - ($4 % 100 + ($4 / 100) * 60)); |
| 9 | 233 } |
| 234 | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid { | |
| 235 yyHour = $1; | |
| 236 yyMinutes = $3; | |
| 237 yySeconds = $5; | |
| 238 yyMeridian = $6; | |
| 239 } | |
| 240 | tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER { | |
| 241 yyHour = $1; | |
| 242 yyMinutes = $3; | |
| 243 yySeconds = $5; | |
| 244 yyMeridian = MER24; | |
|
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245 yyHaveZone++; |
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246 yyTimezone = ($6 < 0 |
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247 ? -$6 % 100 + (-$6 / 100) * 60 |
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248 : - ($6 % 100 + ($6 / 100) * 60)); |
| 9 | 249 } |
| 250 ; | |
| 251 | |
| 252 zone : tZONE { | |
| 253 yyTimezone = $1; | |
| 254 } | |
| 255 | tDAYZONE { | |
|
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256 yyTimezone = $1 - 60; |
| 9 | 257 } |
| 258 | | |
| 259 tZONE tDST { | |
|
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260 yyTimezone = $1 - 60; |
| 9 | 261 } |
| 262 ; | |
| 263 | |
| 264 day : tDAY { | |
| 265 yyDayOrdinal = 1; | |
| 266 yyDayNumber = $1; | |
| 267 } | |
| 268 | tDAY ',' { | |
| 269 yyDayOrdinal = 1; | |
| 270 yyDayNumber = $1; | |
| 271 } | |
| 562 | 272 | tUNUMBER tDAY { |
| 9 | 273 yyDayOrdinal = $1; |
| 274 yyDayNumber = $2; | |
| 275 } | |
| 276 ; | |
| 277 | |
| 278 date : tUNUMBER '/' tUNUMBER { | |
| 279 yyMonth = $1; | |
| 280 yyDay = $3; | |
| 281 } | |
| 282 | tUNUMBER '/' tUNUMBER '/' tUNUMBER { | |
|
795
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283 /* Interpret as YYYY/MM/DD if $1 >= 1000, otherwise as MM/DD/YY. |
|
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284 The goal in recognizing YYYY/MM/DD is solely to support legacy |
|
d72ee3438845
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285 machine-generated dates like those in an RCS log listing. If |
|
d72ee3438845
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286 you want portability, use the ISO 8601 format. */ |
|
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287 if ($1 >= 1000) |
|
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288 { |
|
d72ee3438845
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289 yyYear = $1; |
|
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290 yyMonth = $3; |
|
d72ee3438845
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291 yyDay = $5; |
|
d72ee3438845
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292 } |
|
d72ee3438845
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293 else |
|
d72ee3438845
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294 { |
|
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295 yyMonth = $1; |
|
d72ee3438845
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|
296 yyDay = $3; |
|
d72ee3438845
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297 yyYear = $5; |
|
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298 } |
| 9 | 299 } |
| 300 | tUNUMBER tSNUMBER tSNUMBER { | |
| 301 /* ISO 8601 format. yyyy-mm-dd. */ | |
| 302 yyYear = $1; | |
| 303 yyMonth = -$2; | |
| 304 yyDay = -$3; | |
| 305 } | |
| 176 | 306 | tUNUMBER tMONTH tSNUMBER { |
| 307 /* e.g. 17-JUN-1992. */ | |
| 308 yyDay = $1; | |
| 309 yyMonth = $2; | |
| 310 yyYear = -$3; | |
| 311 } | |
| 9 | 312 | tMONTH tUNUMBER { |
| 313 yyMonth = $1; | |
| 314 yyDay = $2; | |
| 315 } | |
| 316 | tMONTH tUNUMBER ',' tUNUMBER { | |
| 317 yyMonth = $1; | |
| 318 yyDay = $2; | |
| 319 yyYear = $4; | |
| 320 } | |
| 321 | tUNUMBER tMONTH { | |
| 322 yyMonth = $2; | |
| 323 yyDay = $1; | |
| 324 } | |
| 325 | tUNUMBER tMONTH tUNUMBER { | |
| 326 yyMonth = $2; | |
| 327 yyDay = $1; | |
| 328 yyYear = $3; | |
| 329 } | |
| 330 ; | |
| 331 | |
| 332 rel : relunit tAGO { | |
| 333 yyRelSeconds = -yyRelSeconds; | |
|
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334 yyRelMinutes = -yyRelMinutes; |
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335 yyRelHour = -yyRelHour; |
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336 yyRelDay = -yyRelDay; |
| 9 | 337 yyRelMonth = -yyRelMonth; |
|
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|
338 yyRelYear = -yyRelYear; |
| 9 | 339 } |
| 340 | relunit | |
| 341 ; | |
| 342 | |
|
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343 relunit : tUNUMBER tYEAR_UNIT { |
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344 yyRelYear += $1 * $2; |
| 9 | 345 } |
|
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346 | tSNUMBER tYEAR_UNIT { |
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347 yyRelYear += $1 * $2; |
| 9 | 348 } |
|
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|
349 | tYEAR_UNIT { |
|
888
e40500db9101
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|
350 yyRelYear += $1; |
| 9 | 351 } |
|
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|
352 | tUNUMBER tMONTH_UNIT { |
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353 yyRelMonth += $1 * $2; |
| 9 | 354 } |
| 562 | 355 | tSNUMBER tMONTH_UNIT { |
| 9 | 356 yyRelMonth += $1 * $2; |
| 357 } | |
|
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358 | tMONTH_UNIT { |
|
887
4b894f959b71
(tMONTH_UNIT): Increase yyRelMonth by $1, not just by 1.
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|
359 yyRelMonth += $1; |
|
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360 } |
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361 | tUNUMBER tDAY_UNIT { |
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362 yyRelDay += $1 * $2; |
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363 } |
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364 | tSNUMBER tDAY_UNIT { |
|
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365 yyRelDay += $1 * $2; |
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366 } |
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367 | tDAY_UNIT { |
|
887
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|
368 yyRelDay += $1; |
|
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|
369 } |
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370 | tUNUMBER tHOUR_UNIT { |
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371 yyRelHour += $1 * $2; |
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372 } |
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373 | tSNUMBER tHOUR_UNIT { |
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374 yyRelHour += $1 * $2; |
| 9 | 375 } |
|
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376 | tHOUR_UNIT { |
|
887
4b894f959b71
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|
377 yyRelHour += $1; |
|
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378 } |
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379 | tUNUMBER tMINUTE_UNIT { |
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380 yyRelMinutes += $1 * $2; |
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381 } |
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382 | tSNUMBER tMINUTE_UNIT { |
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383 yyRelMinutes += $1 * $2; |
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384 } |
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385 | tMINUTE_UNIT { |
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386 yyRelMinutes += $1; |
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387 } |
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388 | tUNUMBER tSEC_UNIT { |
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389 yyRelSeconds += $1 * $2; |
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390 } |
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391 | tSNUMBER tSEC_UNIT { |
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392 yyRelSeconds += $1 * $2; |
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393 } |
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394 | tSEC_UNIT { |
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395 yyRelSeconds += $1; |
| 9 | 396 } |
| 397 ; | |
| 398 | |
| 857 | 399 number : tUNUMBER |
| 400 { | |
| 9 | 401 if (yyHaveTime && yyHaveDate && !yyHaveRel) |
| 857 | 402 yyYear = $1; |
| 403 else | |
| 404 { | |
| 405 if ($1>10000) | |
| 406 { | |
| 9 | 407 yyHaveDate++; |
| 177 | 408 yyDay= ($1)%100; |
| 409 yyMonth= ($1/100)%100; | |
| 410 yyYear = $1/10000; | |
| 857 | 411 } |
| 412 else | |
| 413 { | |
| 177 | 414 yyHaveTime++; |
| 857 | 415 if ($1 < 100) |
| 416 { | |
| 177 | 417 yyHour = $1; |
| 418 yyMinutes = 0; | |
| 857 | 419 } |
| 420 else | |
| 421 { | |
| 177 | 422 yyHour = $1 / 100; |
| 423 yyMinutes = $1 % 100; | |
| 857 | 424 } |
| 177 | 425 yySeconds = 0; |
| 426 yyMeridian = MER24; | |
| 857 | 427 } |
| 428 } | |
| 429 } | |
| 9 | 430 ; |
| 431 | |
| 857 | 432 o_merid : /* NULL */ |
| 433 { | |
| 9 | 434 $$ = MER24; |
| 857 | 435 } |
| 436 | tMERIDIAN | |
| 437 { | |
| 9 | 438 $$ = $1; |
| 857 | 439 } |
| 9 | 440 ; |
| 441 | |
| 442 %% | |
| 443 | |
| 444 /* Month and day table. */ | |
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445 static TABLE const MonthDayTable[] = { |
| 9 | 446 { "january", tMONTH, 1 }, |
| 447 { "february", tMONTH, 2 }, | |
| 448 { "march", tMONTH, 3 }, | |
| 449 { "april", tMONTH, 4 }, | |
| 450 { "may", tMONTH, 5 }, | |
| 451 { "june", tMONTH, 6 }, | |
| 452 { "july", tMONTH, 7 }, | |
| 453 { "august", tMONTH, 8 }, | |
| 454 { "september", tMONTH, 9 }, | |
| 455 { "sept", tMONTH, 9 }, | |
| 456 { "october", tMONTH, 10 }, | |
| 457 { "november", tMONTH, 11 }, | |
| 458 { "december", tMONTH, 12 }, | |
| 459 { "sunday", tDAY, 0 }, | |
| 460 { "monday", tDAY, 1 }, | |
| 461 { "tuesday", tDAY, 2 }, | |
| 462 { "tues", tDAY, 2 }, | |
| 463 { "wednesday", tDAY, 3 }, | |
| 464 { "wednes", tDAY, 3 }, | |
| 465 { "thursday", tDAY, 4 }, | |
| 466 { "thur", tDAY, 4 }, | |
| 467 { "thurs", tDAY, 4 }, | |
| 468 { "friday", tDAY, 5 }, | |
| 469 { "saturday", tDAY, 6 }, | |
| 470 { NULL } | |
| 471 }; | |
| 472 | |
| 473 /* Time units table. */ | |
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474 static TABLE const UnitsTable[] = { |
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475 { "year", tYEAR_UNIT, 1 }, |
| 9 | 476 { "month", tMONTH_UNIT, 1 }, |
|
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477 { "fortnight", tDAY_UNIT, 14 }, |
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478 { "week", tDAY_UNIT, 7 }, |
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479 { "day", tDAY_UNIT, 1 }, |
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480 { "hour", tHOUR_UNIT, 1 }, |
| 9 | 481 { "minute", tMINUTE_UNIT, 1 }, |
| 482 { "min", tMINUTE_UNIT, 1 }, | |
| 483 { "second", tSEC_UNIT, 1 }, | |
| 484 { "sec", tSEC_UNIT, 1 }, | |
| 485 { NULL } | |
| 486 }; | |
| 487 | |
| 488 /* Assorted relative-time words. */ | |
|
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489 static TABLE const OtherTable[] = { |
| 9 | 490 { "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 }, |
| 491 { "yesterday", tMINUTE_UNIT, -1 * 24 * 60 }, | |
| 492 { "today", tMINUTE_UNIT, 0 }, | |
| 493 { "now", tMINUTE_UNIT, 0 }, | |
| 494 { "last", tUNUMBER, -1 }, | |
| 495 { "this", tMINUTE_UNIT, 0 }, | |
| 496 { "next", tUNUMBER, 2 }, | |
| 497 { "first", tUNUMBER, 1 }, | |
| 498 /* { "second", tUNUMBER, 2 }, */ | |
| 499 { "third", tUNUMBER, 3 }, | |
| 500 { "fourth", tUNUMBER, 4 }, | |
| 501 { "fifth", tUNUMBER, 5 }, | |
| 502 { "sixth", tUNUMBER, 6 }, | |
| 503 { "seventh", tUNUMBER, 7 }, | |
| 504 { "eighth", tUNUMBER, 8 }, | |
| 505 { "ninth", tUNUMBER, 9 }, | |
| 506 { "tenth", tUNUMBER, 10 }, | |
| 507 { "eleventh", tUNUMBER, 11 }, | |
| 508 { "twelfth", tUNUMBER, 12 }, | |
| 509 { "ago", tAGO, 1 }, | |
| 510 { NULL } | |
| 511 }; | |
| 512 | |
| 513 /* The timezone table. */ | |
|
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514 static TABLE const TimezoneTable[] = { |
| 303 | 515 { "gmt", tZONE, HOUR ( 0) }, /* Greenwich Mean */ |
| 516 { "ut", tZONE, HOUR ( 0) }, /* Universal (Coordinated) */ | |
| 517 { "utc", tZONE, HOUR ( 0) }, | |
| 518 { "wet", tZONE, HOUR ( 0) }, /* Western European */ | |
| 519 { "bst", tDAYZONE, HOUR ( 0) }, /* British Summer */ | |
| 520 { "wat", tZONE, HOUR ( 1) }, /* West Africa */ | |
| 521 { "at", tZONE, HOUR ( 2) }, /* Azores */ | |
| 9 | 522 #if 0 |
| 523 /* For completeness. BST is also British Summer, and GST is | |
| 524 * also Guam Standard. */ | |
| 303 | 525 { "bst", tZONE, HOUR ( 3) }, /* Brazil Standard */ |
| 526 { "gst", tZONE, HOUR ( 3) }, /* Greenland Standard */ | |
| 9 | 527 #endif |
| 528 #if 0 | |
| 303 | 529 { "nft", tZONE, HOUR (3.5) }, /* Newfoundland */ |
| 530 { "nst", tZONE, HOUR (3.5) }, /* Newfoundland Standard */ | |
| 531 { "ndt", tDAYZONE, HOUR (3.5) }, /* Newfoundland Daylight */ | |
| 9 | 532 #endif |
| 303 | 533 { "ast", tZONE, HOUR ( 4) }, /* Atlantic Standard */ |
| 534 { "adt", tDAYZONE, HOUR ( 4) }, /* Atlantic Daylight */ | |
| 535 { "est", tZONE, HOUR ( 5) }, /* Eastern Standard */ | |
| 536 { "edt", tDAYZONE, HOUR ( 5) }, /* Eastern Daylight */ | |
| 537 { "cst", tZONE, HOUR ( 6) }, /* Central Standard */ | |
| 538 { "cdt", tDAYZONE, HOUR ( 6) }, /* Central Daylight */ | |
| 539 { "mst", tZONE, HOUR ( 7) }, /* Mountain Standard */ | |
| 540 { "mdt", tDAYZONE, HOUR ( 7) }, /* Mountain Daylight */ | |
| 541 { "pst", tZONE, HOUR ( 8) }, /* Pacific Standard */ | |
| 542 { "pdt", tDAYZONE, HOUR ( 8) }, /* Pacific Daylight */ | |
| 543 { "yst", tZONE, HOUR ( 9) }, /* Yukon Standard */ | |
| 544 { "ydt", tDAYZONE, HOUR ( 9) }, /* Yukon Daylight */ | |
| 545 { "hst", tZONE, HOUR (10) }, /* Hawaii Standard */ | |
| 546 { "hdt", tDAYZONE, HOUR (10) }, /* Hawaii Daylight */ | |
| 547 { "cat", tZONE, HOUR (10) }, /* Central Alaska */ | |
| 548 { "ahst", tZONE, HOUR (10) }, /* Alaska-Hawaii Standard */ | |
| 549 { "nt", tZONE, HOUR (11) }, /* Nome */ | |
| 550 { "idlw", tZONE, HOUR (12) }, /* International Date Line West */ | |
| 551 { "cet", tZONE, -HOUR (1) }, /* Central European */ | |
| 552 { "met", tZONE, -HOUR (1) }, /* Middle European */ | |
| 553 { "mewt", tZONE, -HOUR (1) }, /* Middle European Winter */ | |
| 554 { "mest", tDAYZONE, -HOUR (1) }, /* Middle European Summer */ | |
| 555 { "mesz", tDAYZONE, -HOUR (1) }, /* Middle European Summer */ | |
| 556 { "swt", tZONE, -HOUR (1) }, /* Swedish Winter */ | |
| 557 { "sst", tDAYZONE, -HOUR (1) }, /* Swedish Summer */ | |
| 558 { "fwt", tZONE, -HOUR (1) }, /* French Winter */ | |
| 559 { "fst", tDAYZONE, -HOUR (1) }, /* French Summer */ | |
| 560 { "eet", tZONE, -HOUR (2) }, /* Eastern Europe, USSR Zone 1 */ | |
| 561 { "bt", tZONE, -HOUR (3) }, /* Baghdad, USSR Zone 2 */ | |
| 9 | 562 #if 0 |
| 303 | 563 { "it", tZONE, -HOUR (3.5) },/* Iran */ |
| 9 | 564 #endif |
| 303 | 565 { "zp4", tZONE, -HOUR (4) }, /* USSR Zone 3 */ |
| 566 { "zp5", tZONE, -HOUR (5) }, /* USSR Zone 4 */ | |
| 9 | 567 #if 0 |
| 303 | 568 { "ist", tZONE, -HOUR (5.5) },/* Indian Standard */ |
| 9 | 569 #endif |
| 303 | 570 { "zp6", tZONE, -HOUR (6) }, /* USSR Zone 5 */ |
| 9 | 571 #if 0 |
| 299 | 572 /* For completeness. NST is also Newfoundland Standard, and SST is |
| 9 | 573 * also Swedish Summer. */ |
| 303 | 574 { "nst", tZONE, -HOUR (6.5) },/* North Sumatra */ |
| 575 { "sst", tZONE, -HOUR (7) }, /* South Sumatra, USSR Zone 6 */ | |
| 9 | 576 #endif /* 0 */ |
| 303 | 577 { "wast", tZONE, -HOUR (7) }, /* West Australian Standard */ |
| 578 { "wadt", tDAYZONE, -HOUR (7) }, /* West Australian Daylight */ | |
| 9 | 579 #if 0 |
| 303 | 580 { "jt", tZONE, -HOUR (7.5) },/* Java (3pm in Cronusland!) */ |
| 9 | 581 #endif |
| 303 | 582 { "cct", tZONE, -HOUR (8) }, /* China Coast, USSR Zone 7 */ |
| 583 { "jst", tZONE, -HOUR (9) }, /* Japan Standard, USSR Zone 8 */ | |
| 9 | 584 #if 0 |
| 303 | 585 { "cast", tZONE, -HOUR (9.5) },/* Central Australian Standard */ |
| 586 { "cadt", tDAYZONE, -HOUR (9.5) },/* Central Australian Daylight */ | |
| 9 | 587 #endif |
| 303 | 588 { "east", tZONE, -HOUR (10) }, /* Eastern Australian Standard */ |
| 589 { "eadt", tDAYZONE, -HOUR (10) }, /* Eastern Australian Daylight */ | |
| 590 { "gst", tZONE, -HOUR (10) }, /* Guam Standard, USSR Zone 9 */ | |
| 591 { "nzt", tZONE, -HOUR (12) }, /* New Zealand */ | |
| 592 { "nzst", tZONE, -HOUR (12) }, /* New Zealand Standard */ | |
| 593 { "nzdt", tDAYZONE, -HOUR (12) }, /* New Zealand Daylight */ | |
| 594 { "idle", tZONE, -HOUR (12) }, /* International Date Line East */ | |
| 9 | 595 { NULL } |
| 596 }; | |
| 597 | |
| 598 /* Military timezone table. */ | |
|
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599 static TABLE const MilitaryTable[] = { |
| 303 | 600 { "a", tZONE, HOUR ( 1) }, |
| 601 { "b", tZONE, HOUR ( 2) }, | |
| 602 { "c", tZONE, HOUR ( 3) }, | |
| 603 { "d", tZONE, HOUR ( 4) }, | |
| 604 { "e", tZONE, HOUR ( 5) }, | |
| 605 { "f", tZONE, HOUR ( 6) }, | |
| 606 { "g", tZONE, HOUR ( 7) }, | |
| 607 { "h", tZONE, HOUR ( 8) }, | |
| 608 { "i", tZONE, HOUR ( 9) }, | |
| 609 { "k", tZONE, HOUR ( 10) }, | |
| 610 { "l", tZONE, HOUR ( 11) }, | |
| 611 { "m", tZONE, HOUR ( 12) }, | |
| 612 { "n", tZONE, HOUR (- 1) }, | |
| 613 { "o", tZONE, HOUR (- 2) }, | |
| 614 { "p", tZONE, HOUR (- 3) }, | |
| 615 { "q", tZONE, HOUR (- 4) }, | |
| 616 { "r", tZONE, HOUR (- 5) }, | |
| 617 { "s", tZONE, HOUR (- 6) }, | |
| 618 { "t", tZONE, HOUR (- 7) }, | |
| 619 { "u", tZONE, HOUR (- 8) }, | |
| 620 { "v", tZONE, HOUR (- 9) }, | |
| 621 { "w", tZONE, HOUR (-10) }, | |
| 622 { "x", tZONE, HOUR (-11) }, | |
| 623 { "y", tZONE, HOUR (-12) }, | |
| 624 { "z", tZONE, HOUR ( 0) }, | |
| 9 | 625 { NULL } |
| 626 }; | |
| 627 | |
| 628 | |
| 629 | |
| 630 | |
| 631 /* ARGSUSED */ | |
|
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632 static int |
| 303 | 633 yyerror (s) |
| 857 | 634 char *s; |
| 9 | 635 { |
| 636 return 0; | |
| 637 } | |
| 638 | |
|
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639 static int |
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640 ToHour (Hours, Meridian) |
| 857 | 641 int Hours; |
| 642 MERIDIAN Meridian; | |
| 9 | 643 { |
| 857 | 644 switch (Meridian) |
| 645 { | |
| 646 case MER24: | |
| 647 if (Hours < 0 || Hours > 23) | |
| 648 return -1; | |
| 649 return Hours; | |
| 650 case MERam: | |
| 651 if (Hours < 1 || Hours > 12) | |
| 652 return -1; | |
| 653 if (Hours == 12) | |
| 654 Hours = 0; | |
| 655 return Hours; | |
| 656 case MERpm: | |
| 657 if (Hours < 1 || Hours > 12) | |
| 658 return -1; | |
| 659 if (Hours == 12) | |
| 660 Hours = 0; | |
| 661 return Hours + 12; | |
| 662 default: | |
| 663 abort (); | |
| 664 } | |
| 303 | 665 /* NOTREACHED */ |
| 9 | 666 } |
| 667 | |
|
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668 static int |
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669 ToYear (Year) |
| 857 | 670 int Year; |
| 9 | 671 { |
| 303 | 672 if (Year < 0) |
| 673 Year = -Year; | |
|
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674 |
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675 /* XPG4 suggests that years 00-68 map to 2000-2068, and |
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676 years 69-99 map to 1969-1999. */ |
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677 if (Year < 69) |
| 562 | 678 Year += 2000; |
| 679 else if (Year < 100) | |
| 303 | 680 Year += 1900; |
| 9 | 681 |
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682 return Year; |
| 9 | 683 } |
| 684 | |
| 685 static int | |
| 303 | 686 LookupWord (buff) |
| 857 | 687 char *buff; |
| 9 | 688 { |
| 857 | 689 register char *p; |
| 690 register char *q; | |
| 691 register const TABLE *tp; | |
| 692 int i; | |
| 693 int abbrev; | |
| 9 | 694 |
| 303 | 695 /* Make it lowercase. */ |
| 696 for (p = buff; *p; p++) | |
|
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697 if (ISUPPER (*p)) |
| 303 | 698 *p = tolower (*p); |
| 9 | 699 |
| 857 | 700 if (strcmp (buff, "am") == 0 || strcmp (buff, "a.m.") == 0) |
| 701 { | |
| 702 yylval.Meridian = MERam; | |
| 703 return tMERIDIAN; | |
| 704 } | |
| 705 if (strcmp (buff, "pm") == 0 || strcmp (buff, "p.m.") == 0) | |
| 706 { | |
| 707 yylval.Meridian = MERpm; | |
| 708 return tMERIDIAN; | |
| 709 } | |
| 9 | 710 |
| 303 | 711 /* See if we have an abbreviation for a month. */ |
| 712 if (strlen (buff) == 3) | |
| 713 abbrev = 1; | |
| 857 | 714 else if (strlen (buff) == 4 && buff[3] == '.') |
| 715 { | |
| 716 abbrev = 1; | |
| 717 buff[3] = '\0'; | |
| 718 } | |
| 303 | 719 else |
| 720 abbrev = 0; | |
| 9 | 721 |
| 857 | 722 for (tp = MonthDayTable; tp->name; tp++) |
| 723 { | |
| 724 if (abbrev) | |
| 725 { | |
| 726 if (strncmp (buff, tp->name, 3) == 0) | |
| 727 { | |
| 728 yylval.Number = tp->value; | |
| 729 return tp->type; | |
| 730 } | |
| 731 } | |
| 732 else if (strcmp (buff, tp->name) == 0) | |
| 733 { | |
| 734 yylval.Number = tp->value; | |
| 735 return tp->type; | |
| 736 } | |
| 737 } | |
| 738 | |
| 739 for (tp = TimezoneTable; tp->name; tp++) | |
| 740 if (strcmp (buff, tp->name) == 0) | |
| 741 { | |
| 303 | 742 yylval.Number = tp->value; |
| 743 return tp->type; | |
| 744 } | |
| 9 | 745 |
|
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Jim Meyering <jim@meyering.net>
parents:
476
diff
changeset
|
746 if (strcmp (buff, "dst") == 0) |
| 303 | 747 return tDST; |
| 9 | 748 |
| 303 | 749 for (tp = UnitsTable; tp->name; tp++) |
| 857 | 750 if (strcmp (buff, tp->name) == 0) |
| 751 { | |
| 303 | 752 yylval.Number = tp->value; |
| 753 return tp->type; | |
| 754 } | |
| 857 | 755 |
| 756 /* Strip off any plural and try the units table again. */ | |
| 757 i = strlen (buff) - 1; | |
| 758 if (buff[i] == 's') | |
| 759 { | |
| 760 buff[i] = '\0'; | |
| 761 for (tp = UnitsTable; tp->name; tp++) | |
| 762 if (strcmp (buff, tp->name) == 0) | |
| 763 { | |
| 764 yylval.Number = tp->value; | |
| 765 return tp->type; | |
| 766 } | |
| 767 buff[i] = 's'; /* Put back for "this" in OtherTable. */ | |
| 768 } | |
| 9 | 769 |
| 303 | 770 for (tp = OtherTable; tp->name; tp++) |
| 857 | 771 if (strcmp (buff, tp->name) == 0) |
| 772 { | |
| 303 | 773 yylval.Number = tp->value; |
| 774 return tp->type; | |
| 775 } | |
| 857 | 776 |
| 777 /* Military timezones. */ | |
| 778 if (buff[1] == '\0' && ISALPHA (*buff)) | |
| 779 { | |
| 780 for (tp = MilitaryTable; tp->name; tp++) | |
| 781 if (strcmp (buff, tp->name) == 0) | |
| 782 { | |
| 783 yylval.Number = tp->value; | |
| 784 return tp->type; | |
| 785 } | |
| 786 } | |
| 9 | 787 |
| 303 | 788 /* Drop out any periods and try the timezone table again. */ |
| 789 for (i = 0, p = q = buff; *q; q++) | |
| 790 if (*q != '.') | |
| 791 *p++ = *q; | |
| 792 else | |
| 793 i++; | |
| 794 *p = '\0'; | |
| 795 if (i) | |
| 796 for (tp = TimezoneTable; tp->name; tp++) | |
| 857 | 797 if (strcmp (buff, tp->name) == 0) |
| 798 { | |
| 799 yylval.Number = tp->value; | |
| 800 return tp->type; | |
| 801 } | |
| 303 | 802 |
| 803 return tID; | |
| 9 | 804 } |
| 805 | |
|
16
01c6d40adf9d
Make tables static and const when possible.
Jim Meyering <jim@meyering.net>
parents:
9
diff
changeset
|
806 static int |
| 303 | 807 yylex () |
| 9 | 808 { |
| 857 | 809 register char c; |
| 810 register char *p; | |
| 811 char buff[20]; | |
| 812 int Count; | |
| 813 int sign; | |
| 9 | 814 |
| 857 | 815 for (;;) |
| 816 { | |
| 817 while (ISSPACE (*yyInput)) | |
| 818 yyInput++; | |
| 9 | 819 |
| 857 | 820 if (ISDIGIT (c = *yyInput) || c == '-' || c == '+') |
| 821 { | |
| 822 if (c == '-' || c == '+') | |
| 823 { | |
| 824 sign = c == '-' ? -1 : 1; | |
| 825 if (!ISDIGIT (*++yyInput)) | |
| 826 /* skip the '-' sign */ | |
| 827 continue; | |
| 828 } | |
| 829 else | |
| 830 sign = 0; | |
| 831 for (yylval.Number = 0; ISDIGIT (c = *yyInput++);) | |
| 832 yylval.Number = 10 * yylval.Number + c - '0'; | |
| 833 yyInput--; | |
| 834 if (sign < 0) | |
| 835 yylval.Number = -yylval.Number; | |
| 836 return sign ? tSNUMBER : tUNUMBER; | |
| 837 } | |
| 838 if (ISALPHA (c)) | |
| 839 { | |
| 840 for (p = buff; (c = *yyInput++, ISALPHA (c)) || c == '.';) | |
| 841 if (p < &buff[sizeof buff - 1]) | |
| 842 *p++ = c; | |
| 843 *p = '\0'; | |
| 844 yyInput--; | |
| 845 return LookupWord (buff); | |
| 846 } | |
| 847 if (c != '(') | |
| 848 return *yyInput++; | |
| 849 Count = 0; | |
| 850 do | |
| 851 { | |
| 852 c = *yyInput++; | |
| 853 if (c == '\0') | |
| 854 return c; | |
| 855 if (c == '(') | |
| 856 Count++; | |
| 857 else if (c == ')') | |
| 858 Count--; | |
| 859 } | |
| 860 while (Count > 0); | |
| 9 | 861 } |
| 862 } | |
| 863 | |
|
207
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
864 #define TM_YEAR_ORIGIN 1900 |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
865 |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
866 /* Yield A - B, measured in seconds. */ |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
867 static long |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
868 difftm (a, b) |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
869 struct tm *a, *b; |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
870 { |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
871 int ay = a->tm_year + (TM_YEAR_ORIGIN - 1); |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
872 int by = b->tm_year + (TM_YEAR_ORIGIN - 1); |
| 302 | 873 long days = ( |
| 857 | 874 /* difference in day of year */ |
| 875 a->tm_yday - b->tm_yday | |
| 876 /* + intervening leap days */ | |
| 877 + ((ay >> 2) - (by >> 2)) | |
| 878 - (ay / 100 - by / 100) | |
| 879 + ((ay / 100 >> 2) - (by / 100 >> 2)) | |
| 880 /* + difference in years * 365 */ | |
| 881 + (long) (ay - by) * 365 | |
| 882 ); | |
| 883 return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) | |
| 884 + (a->tm_min - b->tm_min)) | |
|
207
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
885 + (a->tm_sec - b->tm_sec)); |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
886 } |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
887 |
| 9 | 888 time_t |
| 303 | 889 get_date (p, now) |
| 857 | 890 const char *p; |
| 891 const time_t *now; | |
| 9 | 892 { |
|
855
9c89b90524b8
(get_date): Change prototype to reflect const'ness of parameters.
Jim Meyering <jim@meyering.net>
parents:
852
diff
changeset
|
893 struct tm tm, tm0, *tmp; |
|
9c89b90524b8
(get_date): Change prototype to reflect const'ness of parameters.
Jim Meyering <jim@meyering.net>
parents:
852
diff
changeset
|
894 time_t Start; |
| 9 | 895 |
| 303 | 896 yyInput = p; |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
897 Start = now ? *now : time ((time_t *) NULL); |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
898 tmp = localtime (&Start); |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
899 yyYear = tmp->tm_year + TM_YEAR_ORIGIN; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
900 yyMonth = tmp->tm_mon + 1; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
901 yyDay = tmp->tm_mday; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
902 yyHour = tmp->tm_hour; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
903 yyMinutes = tmp->tm_min; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
904 yySeconds = tmp->tm_sec; |
| 303 | 905 yyMeridian = MER24; |
| 906 yyRelSeconds = 0; | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
907 yyRelMinutes = 0; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
908 yyRelHour = 0; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
909 yyRelDay = 0; |
| 303 | 910 yyRelMonth = 0; |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
911 yyRelYear = 0; |
| 303 | 912 yyHaveDate = 0; |
| 913 yyHaveDay = 0; | |
| 914 yyHaveRel = 0; | |
| 915 yyHaveTime = 0; | |
| 916 yyHaveZone = 0; | |
| 9 | 917 |
| 303 | 918 if (yyparse () |
| 919 || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1) | |
| 920 return -1; | |
| 9 | 921 |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
922 tm.tm_year = ToYear (yyYear) - TM_YEAR_ORIGIN + yyRelYear; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
923 tm.tm_mon = yyMonth - 1 + yyRelMonth; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
924 tm.tm_mday = yyDay + yyRelDay; |
| 857 | 925 if (yyHaveTime || (yyHaveRel && !yyHaveDate && !yyHaveDay)) |
| 926 { | |
| 927 tm.tm_hour = ToHour (yyHour, yyMeridian); | |
| 928 if (tm.tm_hour < 0) | |
| 929 return -1; | |
| 930 tm.tm_min = yyMinutes; | |
| 931 tm.tm_sec = yySeconds; | |
| 932 } | |
| 933 else | |
| 934 { | |
| 935 tm.tm_hour = tm.tm_min = tm.tm_sec = 0; | |
| 936 } | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
937 tm.tm_hour += yyRelHour; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
938 tm.tm_min += yyRelMinutes; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
939 tm.tm_sec += yyRelSeconds; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
940 tm.tm_isdst = -1; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
941 tm0 = tm; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
942 |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
943 Start = mktime (&tm); |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
944 |
| 857 | 945 if (Start == (time_t) -1) |
| 946 { | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
947 |
| 857 | 948 /* Guard against falsely reporting errors near the time_t boundaries |
| 949 when parsing times in other time zones. For example, if the min | |
| 950 time_t value is 1970-01-01 00:00:00 UTC and we are 8 hours ahead | |
| 951 of UTC, then the min localtime value is 1970-01-01 08:00:00; if | |
| 952 we apply mktime to 1970-01-01 00:00:00 we will get an error, so | |
| 953 we apply mktime to 1970-01-02 08:00:00 instead and adjust the time | |
| 954 zone by 24 hours to compensate. This algorithm assumes that | |
| 955 there is no DST transition within a day of the time_t boundaries. */ | |
| 956 if (yyHaveZone) | |
| 957 { | |
| 958 tm = tm0; | |
| 959 if (tm.tm_year <= EPOCH - TM_YEAR_ORIGIN) | |
| 960 { | |
| 961 tm.tm_mday++; | |
| 962 yyTimezone -= 24 * 60; | |
| 963 } | |
| 964 else | |
| 965 { | |
| 966 tm.tm_mday--; | |
| 967 yyTimezone += 24 * 60; | |
| 968 } | |
| 969 Start = mktime (&tm); | |
| 970 } | |
| 971 | |
| 972 if (Start == (time_t) -1) | |
| 973 return Start; | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
974 } |
|
855
9c89b90524b8
(get_date): Change prototype to reflect const'ness of parameters.
Jim Meyering <jim@meyering.net>
parents:
852
diff
changeset
|
975 |
| 857 | 976 if (yyHaveDay && !yyHaveDate) |
| 977 { | |
| 978 tm.tm_mday += ((yyDayNumber - tm.tm_wday + 7) % 7 | |
| 979 + 7 * (yyDayOrdinal - (0 < yyDayOrdinal))); | |
| 980 Start = mktime (&tm); | |
| 981 if (Start == (time_t) -1) | |
| 982 return Start; | |
| 983 } | |
| 9 | 984 |
| 857 | 985 if (yyHaveZone) |
| 986 { | |
| 987 long delta = yyTimezone * 60L + difftm (&tm, gmtime (&Start)); | |
| 988 if ((Start + delta < Start) != (delta < 0)) | |
| 989 return -1; /* time_t overflow */ | |
| 990 Start += delta; | |
| 991 } | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
992 |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
993 return Start; |
| 9 | 994 } |
| 995 | |
| 303 | 996 #if defined (TEST) |
| 9 | 997 |
| 998 /* ARGSUSED */ | |
| 202 | 999 int |
| 303 | 1000 main (ac, av) |
| 857 | 1001 int ac; |
| 1002 char *av[]; | |
| 9 | 1003 { |
| 321 | 1004 char buff[MAX_BUFF_LEN + 1]; |
| 1005 time_t d; | |
| 9 | 1006 |
| 857 | 1007 (void) printf ("Enter date, or blank line to exit.\n\t> "); |
| 1008 (void) fflush (stdout); | |
| 321 | 1009 |
| 1010 buff[MAX_BUFF_LEN] = 0; | |
| 857 | 1011 while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0]) |
| 1012 { | |
| 1013 d = get_date (buff, (time_t *) NULL); | |
| 1014 if (d == -1) | |
| 1015 (void) printf ("Bad format - couldn't convert.\n"); | |
| 1016 else | |
| 1017 (void) printf ("%s", ctime (&d)); | |
| 1018 (void) printf ("\t> "); | |
| 1019 (void) fflush (stdout); | |
| 1020 } | |
| 303 | 1021 exit (0); |
| 1022 /* NOTREACHED */ | |
| 9 | 1023 } |
| 857 | 1024 #endif /* defined (TEST) */ |