Mercurial > hg > octave-kai > gnulib-hg
annotate lib/getdate.y @ 1265:b2af16215011
s/get-date.h/getdate.h/
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Sat, 14 Mar 1998 16:31:51 +0000 |
| parents | ff5c50f24fbc |
| children | 0f1daf1810b4 |
| 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 ** |
| 8 ** This code is in the public domain and has no copyright. | |
| 9 */ | |
| 10 | |
| 48 | 11 #ifdef HAVE_CONFIG_H |
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12 # include <config.h> |
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13 # ifdef FORCE_ALLOCA_H |
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14 # include <alloca.h> |
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15 # endif |
| 101 | 16 #endif |
| 48 | 17 |
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18 /* Since the code of getdate.y is not included in the Emacs executable |
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19 itself, there is no need to #define static in this file. Even if |
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20 the code were included in the Emacs executable, it probably |
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21 wouldn't do any harm to #undef it here; this will only cause |
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22 problems if we try to write to a static variable, which I don't |
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23 think this code needs to do. */ |
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24 #ifdef emacs |
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25 # undef static |
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26 #endif |
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27 |
| 9 | 28 #include <stdio.h> |
| 29 #include <ctype.h> | |
| 30 | |
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31 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII)) |
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32 # define IN_CTYPE_DOMAIN(c) 1 |
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33 #else |
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34 # define IN_CTYPE_DOMAIN(c) isascii(c) |
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35 #endif |
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36 |
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37 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c)) |
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38 #define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c)) |
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39 #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c)) |
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40 #define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c)) |
| 814 | 41 |
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42 /* ISDIGIT differs from ISDIGIT_LOCALE, as follows: |
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43 - Its arg may be any int or unsigned int; it need not be an unsigned char. |
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44 - It's guaranteed to evaluate its argument exactly once. |
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45 - It's typically faster. |
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46 Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that |
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47 only '0' through '9' are digits. Prefer ISDIGIT to ISDIGIT_LOCALE unless |
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48 it's important to use the locale's definition of `digit' even when the |
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49 host does not conform to Posix. */ |
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50 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9) |
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51 |
| 9 | 52 #if defined (STDC_HEADERS) || defined (USG) |
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53 # include <string.h> |
| 9 | 54 #endif |
| 55 | |
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56 /* Some old versions of bison generate parsers that use bcopy. |
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57 That loses on systems that don't provide the function, so we have |
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58 to redefine it here. */ |
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59 #if !defined (HAVE_BCOPY) && defined (HAVE_MEMCPY) && !defined (bcopy) |
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60 # define bcopy(from, to, len) memcpy ((to), (from), (len)) |
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61 #endif |
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62 |
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63 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc), |
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64 as well as gratuitiously global symbol names, so we can have multiple |
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65 yacc generated parsers in the same program. Note that these are only |
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66 the variables produced by yacc. If other parser generators (bison, |
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67 byacc, etc) produce additional global names that conflict at link time, |
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68 then those parser generators need to be fixed instead of adding those |
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69 names to this list. */ |
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70 |
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71 #define yymaxdepth gd_maxdepth |
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72 #define yyparse gd_parse |
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73 #define yylex gd_lex |
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74 #define yyerror gd_error |
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75 #define yylval gd_lval |
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76 #define yychar gd_char |
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77 #define yydebug gd_debug |
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78 #define yypact gd_pact |
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79 #define yyr1 gd_r1 |
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80 #define yyr2 gd_r2 |
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81 #define yydef gd_def |
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82 #define yychk gd_chk |
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83 #define yypgo gd_pgo |
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84 #define yyact gd_act |
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85 #define yyexca gd_exca |
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86 #define yyerrflag gd_errflag |
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87 #define yynerrs gd_nerrs |
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88 #define yyps gd_ps |
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89 #define yypv gd_pv |
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90 #define yys gd_s |
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91 #define yy_yys gd_yys |
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92 #define yystate gd_state |
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93 #define yytmp gd_tmp |
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94 #define yyv gd_v |
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95 #define yy_yyv gd_yyv |
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96 #define yyval gd_val |
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97 #define yylloc gd_lloc |
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98 #define yyreds gd_reds /* With YYDEBUG defined */ |
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99 #define yytoks gd_toks /* With YYDEBUG defined */ |
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100 #define yylhs gd_yylhs |
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101 #define yylen gd_yylen |
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102 #define yydefred gd_yydefred |
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103 #define yydgoto gd_yydgoto |
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104 #define yysindex gd_yysindex |
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105 #define yyrindex gd_yyrindex |
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106 #define yygindex gd_yygindex |
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107 #define yytable gd_yytable |
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108 #define yycheck gd_yycheck |
| 9 | 109 |
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110 static int yylex (); |
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111 static int yyerror (); |
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112 |
| 9 | 113 #define EPOCH 1970 |
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114 #define HOUR(x) ((x) * 60) |
| 9 | 115 |
| 303 | 116 #define MAX_BUFF_LEN 128 /* size of buffer to read the date into */ |
| 9 | 117 |
| 118 /* | |
| 119 ** An entry in the lexical lookup table. | |
| 120 */ | |
| 121 typedef struct _TABLE { | |
| 304 | 122 const char *name; |
| 9 | 123 int type; |
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124 int value; |
| 9 | 125 } TABLE; |
| 126 | |
| 127 | |
| 128 /* | |
| 129 ** Meridian: am, pm, or 24-hour style. | |
| 130 */ | |
| 131 typedef enum _MERIDIAN { | |
| 132 MERam, MERpm, MER24 | |
| 133 } MERIDIAN; | |
| 134 | |
| 135 | |
| 136 /* | |
| 137 ** Global variables. We could get rid of most of these by using a good | |
| 138 ** union as the yacc stack. (This routine was originally written before | |
| 139 ** yacc had the %union construct.) Maybe someday; right now we only use | |
| 140 ** the %union very rarely. | |
| 141 */ | |
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142 static const char *yyInput; |
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143 static int yyDayOrdinal; |
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parents:
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144 static int yyDayNumber; |
| 9 | 145 static int yyHaveDate; |
| 146 static int yyHaveDay; | |
| 147 static int yyHaveRel; | |
| 148 static int yyHaveTime; | |
| 149 static int yyHaveZone; | |
|
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150 static int yyTimezone; |
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151 static int yyDay; |
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152 static int yyHour; |
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153 static int yyMinutes; |
|
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154 static int yyMonth; |
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155 static int yySeconds; |
|
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156 static int yyYear; |
| 9 | 157 static MERIDIAN yyMeridian; |
|
852
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158 static int yyRelDay; |
|
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159 static int yyRelHour; |
|
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160 static int yyRelMinutes; |
|
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|
161 static int yyRelMonth; |
|
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162 static int yyRelSeconds; |
|
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|
163 static int yyRelYear; |
| 9 | 164 |
| 165 %} | |
| 166 | |
| 1203 | 167 /* This grammar has 13 shift/reduce conflicts. */ |
| 168 %expect 13 | |
| 169 | |
| 9 | 170 %union { |
|
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171 int Number; |
| 9 | 172 enum _MERIDIAN Meridian; |
| 173 } | |
| 174 | |
|
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175 %token tAGO tDAY tDAY_UNIT tDAYZONE tDST tHOUR_UNIT tID |
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176 %token tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT |
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177 %token tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE |
| 9 | 178 |
|
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179 %type <Number> tDAY tDAY_UNIT tDAYZONE tHOUR_UNIT tMINUTE_UNIT |
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180 %type <Number> tMONTH tMONTH_UNIT |
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181 %type <Number> tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE |
| 9 | 182 %type <Meridian> tMERIDIAN o_merid |
| 183 | |
| 184 %% | |
| 185 | |
| 186 spec : /* NULL */ | |
| 187 | spec item | |
| 188 ; | |
| 189 | |
| 190 item : time { | |
| 191 yyHaveTime++; | |
| 192 } | |
| 193 | zone { | |
| 194 yyHaveZone++; | |
| 195 } | |
| 196 | date { | |
| 197 yyHaveDate++; | |
| 198 } | |
| 199 | day { | |
| 200 yyHaveDay++; | |
| 201 } | |
| 202 | rel { | |
| 203 yyHaveRel++; | |
| 204 } | |
| 205 | number | |
| 206 ; | |
| 207 | |
| 208 time : tUNUMBER tMERIDIAN { | |
| 209 yyHour = $1; | |
| 210 yyMinutes = 0; | |
| 211 yySeconds = 0; | |
| 212 yyMeridian = $2; | |
| 213 } | |
| 214 | tUNUMBER ':' tUNUMBER o_merid { | |
| 215 yyHour = $1; | |
| 216 yyMinutes = $3; | |
| 217 yySeconds = 0; | |
| 218 yyMeridian = $4; | |
| 219 } | |
| 220 | tUNUMBER ':' tUNUMBER tSNUMBER { | |
| 221 yyHour = $1; | |
| 222 yyMinutes = $3; | |
| 223 yyMeridian = MER24; | |
|
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224 yyHaveZone++; |
|
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225 yyTimezone = ($4 < 0 |
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226 ? -$4 % 100 + (-$4 / 100) * 60 |
|
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|
227 : - ($4 % 100 + ($4 / 100) * 60)); |
| 9 | 228 } |
| 229 | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid { | |
| 230 yyHour = $1; | |
| 231 yyMinutes = $3; | |
| 232 yySeconds = $5; | |
| 233 yyMeridian = $6; | |
| 234 } | |
| 235 | tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER { | |
| 236 yyHour = $1; | |
| 237 yyMinutes = $3; | |
| 238 yySeconds = $5; | |
| 239 yyMeridian = MER24; | |
|
852
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Jim Meyering <jim@meyering.net>
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diff
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|
240 yyHaveZone++; |
|
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|
241 yyTimezone = ($6 < 0 |
|
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parents:
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|
242 ? -$6 % 100 + (-$6 / 100) * 60 |
|
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|
243 : - ($6 % 100 + ($6 / 100) * 60)); |
| 9 | 244 } |
| 245 ; | |
| 246 | |
| 247 zone : tZONE { | |
| 248 yyTimezone = $1; | |
| 249 } | |
| 250 | tDAYZONE { | |
|
852
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|
251 yyTimezone = $1 - 60; |
| 9 | 252 } |
| 253 | | |
| 254 tZONE tDST { | |
|
852
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|
255 yyTimezone = $1 - 60; |
| 9 | 256 } |
| 257 ; | |
| 258 | |
| 259 day : tDAY { | |
| 260 yyDayOrdinal = 1; | |
| 261 yyDayNumber = $1; | |
| 262 } | |
| 263 | tDAY ',' { | |
| 264 yyDayOrdinal = 1; | |
| 265 yyDayNumber = $1; | |
| 266 } | |
| 562 | 267 | tUNUMBER tDAY { |
| 9 | 268 yyDayOrdinal = $1; |
| 269 yyDayNumber = $2; | |
| 270 } | |
| 271 ; | |
| 272 | |
| 273 date : tUNUMBER '/' tUNUMBER { | |
| 274 yyMonth = $1; | |
| 275 yyDay = $3; | |
| 276 } | |
| 277 | tUNUMBER '/' tUNUMBER '/' tUNUMBER { | |
|
795
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
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278 /* Interpret as YYYY/MM/DD if $1 >= 1000, otherwise as MM/DD/YY. |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
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diff
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279 The goal in recognizing YYYY/MM/DD is solely to support legacy |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
769
diff
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|
280 machine-generated dates like those in an RCS log listing. If |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
769
diff
changeset
|
281 you want portability, use the ISO 8601 format. */ |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
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parents:
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282 if ($1 >= 1000) |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
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diff
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|
283 { |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
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|
284 yyYear = $1; |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
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parents:
769
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|
285 yyMonth = $3; |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
769
diff
changeset
|
286 yyDay = $5; |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
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parents:
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|
287 } |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
769
diff
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|
288 else |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
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parents:
769
diff
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|
289 { |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
769
diff
changeset
|
290 yyMonth = $1; |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
769
diff
changeset
|
291 yyDay = $3; |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
769
diff
changeset
|
292 yyYear = $5; |
|
d72ee3438845
(date): Interpret the date, L/M/N, as YYYY/MM/DD
Jim Meyering <jim@meyering.net>
parents:
769
diff
changeset
|
293 } |
| 9 | 294 } |
| 295 | tUNUMBER tSNUMBER tSNUMBER { | |
| 296 /* ISO 8601 format. yyyy-mm-dd. */ | |
| 297 yyYear = $1; | |
| 298 yyMonth = -$2; | |
| 299 yyDay = -$3; | |
| 300 } | |
| 176 | 301 | tUNUMBER tMONTH tSNUMBER { |
| 302 /* e.g. 17-JUN-1992. */ | |
| 303 yyDay = $1; | |
| 304 yyMonth = $2; | |
| 305 yyYear = -$3; | |
| 306 } | |
| 9 | 307 | tMONTH tUNUMBER { |
| 308 yyMonth = $1; | |
| 309 yyDay = $2; | |
| 310 } | |
| 311 | tMONTH tUNUMBER ',' tUNUMBER { | |
| 312 yyMonth = $1; | |
| 313 yyDay = $2; | |
| 314 yyYear = $4; | |
| 315 } | |
| 316 | tUNUMBER tMONTH { | |
| 317 yyMonth = $2; | |
| 318 yyDay = $1; | |
| 319 } | |
| 320 | tUNUMBER tMONTH tUNUMBER { | |
| 321 yyMonth = $2; | |
| 322 yyDay = $1; | |
| 323 yyYear = $3; | |
| 324 } | |
| 325 ; | |
| 326 | |
| 327 rel : relunit tAGO { | |
| 328 yyRelSeconds = -yyRelSeconds; | |
|
852
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diff
changeset
|
329 yyRelMinutes = -yyRelMinutes; |
|
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parents:
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diff
changeset
|
330 yyRelHour = -yyRelHour; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
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parents:
814
diff
changeset
|
331 yyRelDay = -yyRelDay; |
| 9 | 332 yyRelMonth = -yyRelMonth; |
|
852
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
333 yyRelYear = -yyRelYear; |
| 9 | 334 } |
| 335 | relunit | |
| 336 ; | |
| 337 | |
|
852
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
338 relunit : tUNUMBER tYEAR_UNIT { |
|
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
339 yyRelYear += $1 * $2; |
| 9 | 340 } |
|
852
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parents:
814
diff
changeset
|
341 | tSNUMBER tYEAR_UNIT { |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
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parents:
814
diff
changeset
|
342 yyRelYear += $1 * $2; |
| 9 | 343 } |
|
852
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
344 | tYEAR_UNIT { |
|
888
e40500db9101
(tYEAR_UNIT): Increase yyRelYear by $1, not just by 1.
Jim Meyering <jim@meyering.net>
parents:
887
diff
changeset
|
345 yyRelYear += $1; |
| 9 | 346 } |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
347 | tUNUMBER tMONTH_UNIT { |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
348 yyRelMonth += $1 * $2; |
| 9 | 349 } |
| 562 | 350 | tSNUMBER tMONTH_UNIT { |
| 9 | 351 yyRelMonth += $1 * $2; |
| 352 } | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
353 | tMONTH_UNIT { |
|
887
4b894f959b71
(tMONTH_UNIT): Increase yyRelMonth by $1, not just by 1.
Jim Meyering <jim@meyering.net>
parents:
857
diff
changeset
|
354 yyRelMonth += $1; |
|
852
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
355 } |
|
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
356 | tUNUMBER tDAY_UNIT { |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
357 yyRelDay += $1 * $2; |
|
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
358 } |
|
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
359 | tSNUMBER tDAY_UNIT { |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
360 yyRelDay += $1 * $2; |
|
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
361 } |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
362 | tDAY_UNIT { |
|
887
4b894f959b71
(tMONTH_UNIT): Increase yyRelMonth by $1, not just by 1.
Jim Meyering <jim@meyering.net>
parents:
857
diff
changeset
|
363 yyRelDay += $1; |
|
852
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
364 } |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
365 | tUNUMBER tHOUR_UNIT { |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
366 yyRelHour += $1 * $2; |
|
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
367 } |
|
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
368 | tSNUMBER tHOUR_UNIT { |
|
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
369 yyRelHour += $1 * $2; |
| 9 | 370 } |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
371 | tHOUR_UNIT { |
|
887
4b894f959b71
(tMONTH_UNIT): Increase yyRelMonth by $1, not just by 1.
Jim Meyering <jim@meyering.net>
parents:
857
diff
changeset
|
372 yyRelHour += $1; |
|
852
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
373 } |
|
2156a43352c1
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Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
374 | tUNUMBER tMINUTE_UNIT { |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
375 yyRelMinutes += $1 * $2; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
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|
376 } |
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377 | tSNUMBER tMINUTE_UNIT { |
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378 yyRelMinutes += $1 * $2; |
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379 } |
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380 | tMINUTE_UNIT { |
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381 yyRelMinutes += $1; |
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382 } |
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383 | tUNUMBER tSEC_UNIT { |
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384 yyRelSeconds += $1 * $2; |
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385 } |
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386 | tSNUMBER tSEC_UNIT { |
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387 yyRelSeconds += $1 * $2; |
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388 } |
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389 | tSEC_UNIT { |
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390 yyRelSeconds += $1; |
| 9 | 391 } |
| 392 ; | |
| 393 | |
| 857 | 394 number : tUNUMBER |
| 395 { | |
| 9 | 396 if (yyHaveTime && yyHaveDate && !yyHaveRel) |
| 857 | 397 yyYear = $1; |
| 398 else | |
| 399 { | |
| 400 if ($1>10000) | |
| 401 { | |
| 9 | 402 yyHaveDate++; |
| 177 | 403 yyDay= ($1)%100; |
| 404 yyMonth= ($1/100)%100; | |
| 405 yyYear = $1/10000; | |
| 857 | 406 } |
| 407 else | |
| 408 { | |
| 177 | 409 yyHaveTime++; |
| 857 | 410 if ($1 < 100) |
| 411 { | |
| 177 | 412 yyHour = $1; |
| 413 yyMinutes = 0; | |
| 857 | 414 } |
| 415 else | |
| 416 { | |
| 177 | 417 yyHour = $1 / 100; |
| 418 yyMinutes = $1 % 100; | |
| 857 | 419 } |
| 177 | 420 yySeconds = 0; |
| 421 yyMeridian = MER24; | |
| 857 | 422 } |
| 423 } | |
| 424 } | |
| 9 | 425 ; |
| 426 | |
| 857 | 427 o_merid : /* NULL */ |
| 428 { | |
| 9 | 429 $$ = MER24; |
| 857 | 430 } |
| 431 | tMERIDIAN | |
| 432 { | |
| 9 | 433 $$ = $1; |
| 857 | 434 } |
| 9 | 435 ; |
| 436 | |
| 437 %% | |
| 438 | |
| 1203 | 439 /* Include this file down here because bison inserts code above which |
| 440 may define-away `const'. We want the prototype for get_date to have | |
| 441 the same signature as the function definition does. */ | |
| 1265 | 442 #include "getdate.h" |
| 1203 | 443 |
| 444 extern struct tm *gmtime (); | |
| 445 extern struct tm *localtime (); | |
| 446 extern time_t mktime (); | |
| 447 | |
| 9 | 448 /* Month and day table. */ |
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449 static TABLE const MonthDayTable[] = { |
| 9 | 450 { "january", tMONTH, 1 }, |
| 451 { "february", tMONTH, 2 }, | |
| 452 { "march", tMONTH, 3 }, | |
| 453 { "april", tMONTH, 4 }, | |
| 454 { "may", tMONTH, 5 }, | |
| 455 { "june", tMONTH, 6 }, | |
| 456 { "july", tMONTH, 7 }, | |
| 457 { "august", tMONTH, 8 }, | |
| 458 { "september", tMONTH, 9 }, | |
| 459 { "sept", tMONTH, 9 }, | |
| 460 { "october", tMONTH, 10 }, | |
| 461 { "november", tMONTH, 11 }, | |
| 462 { "december", tMONTH, 12 }, | |
| 463 { "sunday", tDAY, 0 }, | |
| 464 { "monday", tDAY, 1 }, | |
| 465 { "tuesday", tDAY, 2 }, | |
| 466 { "tues", tDAY, 2 }, | |
| 467 { "wednesday", tDAY, 3 }, | |
| 468 { "wednes", tDAY, 3 }, | |
| 469 { "thursday", tDAY, 4 }, | |
| 470 { "thur", tDAY, 4 }, | |
| 471 { "thurs", tDAY, 4 }, | |
| 472 { "friday", tDAY, 5 }, | |
| 473 { "saturday", tDAY, 6 }, | |
| 474 { NULL } | |
| 475 }; | |
| 476 | |
| 477 /* Time units table. */ | |
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478 static TABLE const UnitsTable[] = { |
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479 { "year", tYEAR_UNIT, 1 }, |
| 9 | 480 { "month", tMONTH_UNIT, 1 }, |
|
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481 { "fortnight", tDAY_UNIT, 14 }, |
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482 { "week", tDAY_UNIT, 7 }, |
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483 { "day", tDAY_UNIT, 1 }, |
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484 { "hour", tHOUR_UNIT, 1 }, |
| 9 | 485 { "minute", tMINUTE_UNIT, 1 }, |
| 486 { "min", tMINUTE_UNIT, 1 }, | |
| 487 { "second", tSEC_UNIT, 1 }, | |
| 488 { "sec", tSEC_UNIT, 1 }, | |
| 489 { NULL } | |
| 490 }; | |
| 491 | |
| 492 /* Assorted relative-time words. */ | |
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493 static TABLE const OtherTable[] = { |
| 9 | 494 { "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 }, |
| 495 { "yesterday", tMINUTE_UNIT, -1 * 24 * 60 }, | |
| 496 { "today", tMINUTE_UNIT, 0 }, | |
| 497 { "now", tMINUTE_UNIT, 0 }, | |
| 498 { "last", tUNUMBER, -1 }, | |
| 499 { "this", tMINUTE_UNIT, 0 }, | |
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500 { "next", tUNUMBER, 1 }, |
| 9 | 501 { "first", tUNUMBER, 1 }, |
| 502 /* { "second", tUNUMBER, 2 }, */ | |
| 503 { "third", tUNUMBER, 3 }, | |
| 504 { "fourth", tUNUMBER, 4 }, | |
| 505 { "fifth", tUNUMBER, 5 }, | |
| 506 { "sixth", tUNUMBER, 6 }, | |
| 507 { "seventh", tUNUMBER, 7 }, | |
| 508 { "eighth", tUNUMBER, 8 }, | |
| 509 { "ninth", tUNUMBER, 9 }, | |
| 510 { "tenth", tUNUMBER, 10 }, | |
| 511 { "eleventh", tUNUMBER, 11 }, | |
| 512 { "twelfth", tUNUMBER, 12 }, | |
| 513 { "ago", tAGO, 1 }, | |
| 514 { NULL } | |
| 515 }; | |
| 516 | |
| 517 /* The timezone table. */ | |
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518 static TABLE const TimezoneTable[] = { |
| 303 | 519 { "gmt", tZONE, HOUR ( 0) }, /* Greenwich Mean */ |
| 520 { "ut", tZONE, HOUR ( 0) }, /* Universal (Coordinated) */ | |
| 521 { "utc", tZONE, HOUR ( 0) }, | |
| 522 { "wet", tZONE, HOUR ( 0) }, /* Western European */ | |
| 523 { "bst", tDAYZONE, HOUR ( 0) }, /* British Summer */ | |
| 524 { "wat", tZONE, HOUR ( 1) }, /* West Africa */ | |
| 525 { "at", tZONE, HOUR ( 2) }, /* Azores */ | |
| 9 | 526 #if 0 |
| 527 /* For completeness. BST is also British Summer, and GST is | |
| 528 * also Guam Standard. */ | |
| 303 | 529 { "bst", tZONE, HOUR ( 3) }, /* Brazil Standard */ |
| 530 { "gst", tZONE, HOUR ( 3) }, /* Greenland Standard */ | |
| 9 | 531 #endif |
| 532 #if 0 | |
| 303 | 533 { "nft", tZONE, HOUR (3.5) }, /* Newfoundland */ |
| 534 { "nst", tZONE, HOUR (3.5) }, /* Newfoundland Standard */ | |
| 535 { "ndt", tDAYZONE, HOUR (3.5) }, /* Newfoundland Daylight */ | |
| 9 | 536 #endif |
| 303 | 537 { "ast", tZONE, HOUR ( 4) }, /* Atlantic Standard */ |
| 538 { "adt", tDAYZONE, HOUR ( 4) }, /* Atlantic Daylight */ | |
| 539 { "est", tZONE, HOUR ( 5) }, /* Eastern Standard */ | |
| 540 { "edt", tDAYZONE, HOUR ( 5) }, /* Eastern Daylight */ | |
| 541 { "cst", tZONE, HOUR ( 6) }, /* Central Standard */ | |
| 542 { "cdt", tDAYZONE, HOUR ( 6) }, /* Central Daylight */ | |
| 543 { "mst", tZONE, HOUR ( 7) }, /* Mountain Standard */ | |
| 544 { "mdt", tDAYZONE, HOUR ( 7) }, /* Mountain Daylight */ | |
| 545 { "pst", tZONE, HOUR ( 8) }, /* Pacific Standard */ | |
| 546 { "pdt", tDAYZONE, HOUR ( 8) }, /* Pacific Daylight */ | |
| 547 { "yst", tZONE, HOUR ( 9) }, /* Yukon Standard */ | |
| 548 { "ydt", tDAYZONE, HOUR ( 9) }, /* Yukon Daylight */ | |
| 549 { "hst", tZONE, HOUR (10) }, /* Hawaii Standard */ | |
| 550 { "hdt", tDAYZONE, HOUR (10) }, /* Hawaii Daylight */ | |
| 551 { "cat", tZONE, HOUR (10) }, /* Central Alaska */ | |
| 552 { "ahst", tZONE, HOUR (10) }, /* Alaska-Hawaii Standard */ | |
| 553 { "nt", tZONE, HOUR (11) }, /* Nome */ | |
| 554 { "idlw", tZONE, HOUR (12) }, /* International Date Line West */ | |
| 555 { "cet", tZONE, -HOUR (1) }, /* Central European */ | |
| 556 { "met", tZONE, -HOUR (1) }, /* Middle European */ | |
| 557 { "mewt", tZONE, -HOUR (1) }, /* Middle European Winter */ | |
| 558 { "mest", tDAYZONE, -HOUR (1) }, /* Middle European Summer */ | |
| 559 { "mesz", tDAYZONE, -HOUR (1) }, /* Middle European Summer */ | |
| 560 { "swt", tZONE, -HOUR (1) }, /* Swedish Winter */ | |
| 561 { "sst", tDAYZONE, -HOUR (1) }, /* Swedish Summer */ | |
| 562 { "fwt", tZONE, -HOUR (1) }, /* French Winter */ | |
| 563 { "fst", tDAYZONE, -HOUR (1) }, /* French Summer */ | |
| 564 { "eet", tZONE, -HOUR (2) }, /* Eastern Europe, USSR Zone 1 */ | |
| 565 { "bt", tZONE, -HOUR (3) }, /* Baghdad, USSR Zone 2 */ | |
| 9 | 566 #if 0 |
| 303 | 567 { "it", tZONE, -HOUR (3.5) },/* Iran */ |
| 9 | 568 #endif |
| 303 | 569 { "zp4", tZONE, -HOUR (4) }, /* USSR Zone 3 */ |
| 570 { "zp5", tZONE, -HOUR (5) }, /* USSR Zone 4 */ | |
| 9 | 571 #if 0 |
| 303 | 572 { "ist", tZONE, -HOUR (5.5) },/* Indian Standard */ |
| 9 | 573 #endif |
| 303 | 574 { "zp6", tZONE, -HOUR (6) }, /* USSR Zone 5 */ |
| 9 | 575 #if 0 |
| 299 | 576 /* For completeness. NST is also Newfoundland Standard, and SST is |
| 9 | 577 * also Swedish Summer. */ |
| 303 | 578 { "nst", tZONE, -HOUR (6.5) },/* North Sumatra */ |
| 579 { "sst", tZONE, -HOUR (7) }, /* South Sumatra, USSR Zone 6 */ | |
| 9 | 580 #endif /* 0 */ |
| 303 | 581 { "wast", tZONE, -HOUR (7) }, /* West Australian Standard */ |
| 582 { "wadt", tDAYZONE, -HOUR (7) }, /* West Australian Daylight */ | |
| 9 | 583 #if 0 |
| 303 | 584 { "jt", tZONE, -HOUR (7.5) },/* Java (3pm in Cronusland!) */ |
| 9 | 585 #endif |
| 303 | 586 { "cct", tZONE, -HOUR (8) }, /* China Coast, USSR Zone 7 */ |
| 587 { "jst", tZONE, -HOUR (9) }, /* Japan Standard, USSR Zone 8 */ | |
| 9 | 588 #if 0 |
| 303 | 589 { "cast", tZONE, -HOUR (9.5) },/* Central Australian Standard */ |
| 590 { "cadt", tDAYZONE, -HOUR (9.5) },/* Central Australian Daylight */ | |
| 9 | 591 #endif |
| 303 | 592 { "east", tZONE, -HOUR (10) }, /* Eastern Australian Standard */ |
| 593 { "eadt", tDAYZONE, -HOUR (10) }, /* Eastern Australian Daylight */ | |
| 594 { "gst", tZONE, -HOUR (10) }, /* Guam Standard, USSR Zone 9 */ | |
| 595 { "nzt", tZONE, -HOUR (12) }, /* New Zealand */ | |
| 596 { "nzst", tZONE, -HOUR (12) }, /* New Zealand Standard */ | |
| 597 { "nzdt", tDAYZONE, -HOUR (12) }, /* New Zealand Daylight */ | |
| 598 { "idle", tZONE, -HOUR (12) }, /* International Date Line East */ | |
| 9 | 599 { NULL } |
| 600 }; | |
| 601 | |
| 602 /* Military timezone table. */ | |
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603 static TABLE const MilitaryTable[] = { |
| 303 | 604 { "a", tZONE, HOUR ( 1) }, |
| 605 { "b", tZONE, HOUR ( 2) }, | |
| 606 { "c", tZONE, HOUR ( 3) }, | |
| 607 { "d", tZONE, HOUR ( 4) }, | |
| 608 { "e", tZONE, HOUR ( 5) }, | |
| 609 { "f", tZONE, HOUR ( 6) }, | |
| 610 { "g", tZONE, HOUR ( 7) }, | |
| 611 { "h", tZONE, HOUR ( 8) }, | |
| 612 { "i", tZONE, HOUR ( 9) }, | |
| 613 { "k", tZONE, HOUR ( 10) }, | |
| 614 { "l", tZONE, HOUR ( 11) }, | |
| 615 { "m", tZONE, HOUR ( 12) }, | |
| 616 { "n", tZONE, HOUR (- 1) }, | |
| 617 { "o", tZONE, HOUR (- 2) }, | |
| 618 { "p", tZONE, HOUR (- 3) }, | |
| 619 { "q", tZONE, HOUR (- 4) }, | |
| 620 { "r", tZONE, HOUR (- 5) }, | |
| 621 { "s", tZONE, HOUR (- 6) }, | |
| 622 { "t", tZONE, HOUR (- 7) }, | |
| 623 { "u", tZONE, HOUR (- 8) }, | |
| 624 { "v", tZONE, HOUR (- 9) }, | |
| 625 { "w", tZONE, HOUR (-10) }, | |
| 626 { "x", tZONE, HOUR (-11) }, | |
| 627 { "y", tZONE, HOUR (-12) }, | |
| 628 { "z", tZONE, HOUR ( 0) }, | |
| 9 | 629 { NULL } |
| 630 }; | |
| 631 | |
| 632 | |
| 633 | |
| 634 | |
| 635 /* ARGSUSED */ | |
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636 static int |
| 303 | 637 yyerror (s) |
| 857 | 638 char *s; |
| 9 | 639 { |
| 640 return 0; | |
| 641 } | |
| 642 | |
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643 static int |
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644 ToHour (Hours, Meridian) |
| 857 | 645 int Hours; |
| 646 MERIDIAN Meridian; | |
| 9 | 647 { |
| 857 | 648 switch (Meridian) |
| 649 { | |
| 650 case MER24: | |
| 651 if (Hours < 0 || Hours > 23) | |
| 652 return -1; | |
| 653 return Hours; | |
| 654 case MERam: | |
| 655 if (Hours < 1 || Hours > 12) | |
| 656 return -1; | |
| 657 if (Hours == 12) | |
| 658 Hours = 0; | |
| 659 return Hours; | |
| 660 case MERpm: | |
| 661 if (Hours < 1 || Hours > 12) | |
| 662 return -1; | |
| 663 if (Hours == 12) | |
| 664 Hours = 0; | |
| 665 return Hours + 12; | |
| 666 default: | |
| 667 abort (); | |
| 668 } | |
| 303 | 669 /* NOTREACHED */ |
| 9 | 670 } |
| 671 | |
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672 static int |
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673 ToYear (Year) |
| 857 | 674 int Year; |
| 9 | 675 { |
| 303 | 676 if (Year < 0) |
| 677 Year = -Year; | |
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678 |
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679 /* XPG4 suggests that years 00-68 map to 2000-2068, and |
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680 years 69-99 map to 1969-1999. */ |
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681 if (Year < 69) |
| 562 | 682 Year += 2000; |
| 683 else if (Year < 100) | |
| 303 | 684 Year += 1900; |
| 9 | 685 |
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686 return Year; |
| 9 | 687 } |
| 688 | |
| 689 static int | |
| 303 | 690 LookupWord (buff) |
| 857 | 691 char *buff; |
| 9 | 692 { |
| 857 | 693 register char *p; |
| 694 register char *q; | |
| 695 register const TABLE *tp; | |
| 696 int i; | |
| 697 int abbrev; | |
| 9 | 698 |
| 303 | 699 /* Make it lowercase. */ |
| 700 for (p = buff; *p; p++) | |
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701 if (ISUPPER (*p)) |
| 303 | 702 *p = tolower (*p); |
| 9 | 703 |
| 857 | 704 if (strcmp (buff, "am") == 0 || strcmp (buff, "a.m.") == 0) |
| 705 { | |
| 706 yylval.Meridian = MERam; | |
| 707 return tMERIDIAN; | |
| 708 } | |
| 709 if (strcmp (buff, "pm") == 0 || strcmp (buff, "p.m.") == 0) | |
| 710 { | |
| 711 yylval.Meridian = MERpm; | |
| 712 return tMERIDIAN; | |
| 713 } | |
| 9 | 714 |
| 303 | 715 /* See if we have an abbreviation for a month. */ |
| 716 if (strlen (buff) == 3) | |
| 717 abbrev = 1; | |
| 857 | 718 else if (strlen (buff) == 4 && buff[3] == '.') |
| 719 { | |
| 720 abbrev = 1; | |
| 721 buff[3] = '\0'; | |
| 722 } | |
| 303 | 723 else |
| 724 abbrev = 0; | |
| 9 | 725 |
| 857 | 726 for (tp = MonthDayTable; tp->name; tp++) |
| 727 { | |
| 728 if (abbrev) | |
| 729 { | |
| 730 if (strncmp (buff, tp->name, 3) == 0) | |
| 731 { | |
| 732 yylval.Number = tp->value; | |
| 733 return tp->type; | |
| 734 } | |
| 735 } | |
| 736 else if (strcmp (buff, tp->name) == 0) | |
| 737 { | |
| 738 yylval.Number = tp->value; | |
| 739 return tp->type; | |
| 740 } | |
| 741 } | |
| 742 | |
| 743 for (tp = TimezoneTable; tp->name; tp++) | |
| 744 if (strcmp (buff, tp->name) == 0) | |
| 745 { | |
| 303 | 746 yylval.Number = tp->value; |
| 747 return tp->type; | |
| 748 } | |
| 9 | 749 |
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|
750 if (strcmp (buff, "dst") == 0) |
| 303 | 751 return tDST; |
| 9 | 752 |
| 303 | 753 for (tp = UnitsTable; tp->name; tp++) |
| 857 | 754 if (strcmp (buff, tp->name) == 0) |
| 755 { | |
| 303 | 756 yylval.Number = tp->value; |
| 757 return tp->type; | |
| 758 } | |
| 857 | 759 |
| 760 /* Strip off any plural and try the units table again. */ | |
| 761 i = strlen (buff) - 1; | |
| 762 if (buff[i] == 's') | |
| 763 { | |
| 764 buff[i] = '\0'; | |
| 765 for (tp = UnitsTable; tp->name; tp++) | |
| 766 if (strcmp (buff, tp->name) == 0) | |
| 767 { | |
| 768 yylval.Number = tp->value; | |
| 769 return tp->type; | |
| 770 } | |
| 771 buff[i] = 's'; /* Put back for "this" in OtherTable. */ | |
| 772 } | |
| 9 | 773 |
| 303 | 774 for (tp = OtherTable; tp->name; tp++) |
| 857 | 775 if (strcmp (buff, tp->name) == 0) |
| 776 { | |
| 303 | 777 yylval.Number = tp->value; |
| 778 return tp->type; | |
| 779 } | |
| 857 | 780 |
| 781 /* Military timezones. */ | |
| 782 if (buff[1] == '\0' && ISALPHA (*buff)) | |
| 783 { | |
| 784 for (tp = MilitaryTable; tp->name; tp++) | |
| 785 if (strcmp (buff, tp->name) == 0) | |
| 786 { | |
| 787 yylval.Number = tp->value; | |
| 788 return tp->type; | |
| 789 } | |
| 790 } | |
| 9 | 791 |
| 303 | 792 /* Drop out any periods and try the timezone table again. */ |
| 793 for (i = 0, p = q = buff; *q; q++) | |
| 794 if (*q != '.') | |
| 795 *p++ = *q; | |
| 796 else | |
| 797 i++; | |
| 798 *p = '\0'; | |
| 799 if (i) | |
| 800 for (tp = TimezoneTable; tp->name; tp++) | |
| 857 | 801 if (strcmp (buff, tp->name) == 0) |
| 802 { | |
| 803 yylval.Number = tp->value; | |
| 804 return tp->type; | |
| 805 } | |
| 303 | 806 |
| 807 return tID; | |
| 9 | 808 } |
| 809 | |
|
16
01c6d40adf9d
Make tables static and const when possible.
Jim Meyering <jim@meyering.net>
parents:
9
diff
changeset
|
810 static int |
| 303 | 811 yylex () |
| 9 | 812 { |
| 857 | 813 register char c; |
| 814 register char *p; | |
| 815 char buff[20]; | |
| 816 int Count; | |
| 817 int sign; | |
| 9 | 818 |
| 857 | 819 for (;;) |
| 820 { | |
| 821 while (ISSPACE (*yyInput)) | |
| 822 yyInput++; | |
| 9 | 823 |
| 857 | 824 if (ISDIGIT (c = *yyInput) || c == '-' || c == '+') |
| 825 { | |
| 826 if (c == '-' || c == '+') | |
| 827 { | |
| 828 sign = c == '-' ? -1 : 1; | |
| 829 if (!ISDIGIT (*++yyInput)) | |
| 830 /* skip the '-' sign */ | |
| 831 continue; | |
| 832 } | |
| 833 else | |
| 834 sign = 0; | |
| 835 for (yylval.Number = 0; ISDIGIT (c = *yyInput++);) | |
| 836 yylval.Number = 10 * yylval.Number + c - '0'; | |
| 837 yyInput--; | |
| 838 if (sign < 0) | |
| 839 yylval.Number = -yylval.Number; | |
| 840 return sign ? tSNUMBER : tUNUMBER; | |
| 841 } | |
| 842 if (ISALPHA (c)) | |
| 843 { | |
| 844 for (p = buff; (c = *yyInput++, ISALPHA (c)) || c == '.';) | |
| 845 if (p < &buff[sizeof buff - 1]) | |
| 846 *p++ = c; | |
| 847 *p = '\0'; | |
| 848 yyInput--; | |
| 849 return LookupWord (buff); | |
| 850 } | |
| 851 if (c != '(') | |
| 852 return *yyInput++; | |
| 853 Count = 0; | |
| 854 do | |
| 855 { | |
| 856 c = *yyInput++; | |
| 857 if (c == '\0') | |
| 858 return c; | |
| 859 if (c == '(') | |
| 860 Count++; | |
| 861 else if (c == ')') | |
| 862 Count--; | |
| 863 } | |
| 864 while (Count > 0); | |
| 9 | 865 } |
| 866 } | |
| 867 | |
|
207
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Revert 1.14-1.16 changes that removed difftm and modified get_date.
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parents:
202
diff
changeset
|
868 #define TM_YEAR_ORIGIN 1900 |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
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parents:
202
diff
changeset
|
869 |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
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parents:
202
diff
changeset
|
870 /* Yield A - B, measured in seconds. */ |
|
25a5ae7fce09
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parents:
202
diff
changeset
|
871 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
|
872 difftm (a, b) |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
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parents:
202
diff
changeset
|
873 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
|
874 { |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
875 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
|
876 int by = b->tm_year + (TM_YEAR_ORIGIN - 1); |
| 302 | 877 long days = ( |
| 857 | 878 /* difference in day of year */ |
| 879 a->tm_yday - b->tm_yday | |
| 880 /* + intervening leap days */ | |
| 881 + ((ay >> 2) - (by >> 2)) | |
| 882 - (ay / 100 - by / 100) | |
| 883 + ((ay / 100 >> 2) - (by / 100 >> 2)) | |
| 884 /* + difference in years * 365 */ | |
| 885 + (long) (ay - by) * 365 | |
| 886 ); | |
| 887 return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) | |
| 888 + (a->tm_min - b->tm_min)) | |
|
207
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Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
889 + (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
|
890 } |
|
25a5ae7fce09
Revert 1.14-1.16 changes that removed difftm and modified get_date.
Jim Meyering <jim@meyering.net>
parents:
202
diff
changeset
|
891 |
| 9 | 892 time_t |
| 1203 | 893 get_date (const char *p, const time_t *now) |
| 9 | 894 { |
|
855
9c89b90524b8
(get_date): Change prototype to reflect const'ness of parameters.
Jim Meyering <jim@meyering.net>
parents:
852
diff
changeset
|
895 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
|
896 time_t Start; |
| 9 | 897 |
| 303 | 898 yyInput = p; |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
899 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
|
900 tmp = localtime (&Start); |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
901 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
|
902 yyMonth = tmp->tm_mon + 1; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
903 yyDay = tmp->tm_mday; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
904 yyHour = tmp->tm_hour; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
905 yyMinutes = tmp->tm_min; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
906 yySeconds = tmp->tm_sec; |
| 303 | 907 yyMeridian = MER24; |
| 908 yyRelSeconds = 0; | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
909 yyRelMinutes = 0; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
910 yyRelHour = 0; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
911 yyRelDay = 0; |
| 303 | 912 yyRelMonth = 0; |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
913 yyRelYear = 0; |
| 303 | 914 yyHaveDate = 0; |
| 915 yyHaveDay = 0; | |
| 916 yyHaveRel = 0; | |
| 917 yyHaveTime = 0; | |
| 918 yyHaveZone = 0; | |
| 9 | 919 |
| 303 | 920 if (yyparse () |
| 921 || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1) | |
| 922 return -1; | |
| 9 | 923 |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
924 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
|
925 tm.tm_mon = yyMonth - 1 + yyRelMonth; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
926 tm.tm_mday = yyDay + yyRelDay; |
| 857 | 927 if (yyHaveTime || (yyHaveRel && !yyHaveDate && !yyHaveDay)) |
| 928 { | |
| 929 tm.tm_hour = ToHour (yyHour, yyMeridian); | |
| 930 if (tm.tm_hour < 0) | |
| 931 return -1; | |
| 932 tm.tm_min = yyMinutes; | |
| 933 tm.tm_sec = yySeconds; | |
| 934 } | |
| 935 else | |
| 936 { | |
| 937 tm.tm_hour = tm.tm_min = tm.tm_sec = 0; | |
| 938 } | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
939 tm.tm_hour += yyRelHour; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
940 tm.tm_min += yyRelMinutes; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
941 tm.tm_sec += yyRelSeconds; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
942 tm.tm_isdst = -1; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
943 tm0 = tm; |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
944 |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
945 Start = mktime (&tm); |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
946 |
| 857 | 947 if (Start == (time_t) -1) |
| 948 { | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
949 |
| 857 | 950 /* Guard against falsely reporting errors near the time_t boundaries |
| 951 when parsing times in other time zones. For example, if the min | |
| 952 time_t value is 1970-01-01 00:00:00 UTC and we are 8 hours ahead | |
| 953 of UTC, then the min localtime value is 1970-01-01 08:00:00; if | |
| 954 we apply mktime to 1970-01-01 00:00:00 we will get an error, so | |
| 955 we apply mktime to 1970-01-02 08:00:00 instead and adjust the time | |
| 956 zone by 24 hours to compensate. This algorithm assumes that | |
| 957 there is no DST transition within a day of the time_t boundaries. */ | |
| 958 if (yyHaveZone) | |
| 959 { | |
| 960 tm = tm0; | |
| 961 if (tm.tm_year <= EPOCH - TM_YEAR_ORIGIN) | |
| 962 { | |
| 963 tm.tm_mday++; | |
| 964 yyTimezone -= 24 * 60; | |
| 965 } | |
| 966 else | |
| 967 { | |
| 968 tm.tm_mday--; | |
| 969 yyTimezone += 24 * 60; | |
| 970 } | |
| 971 Start = mktime (&tm); | |
| 972 } | |
| 973 | |
| 974 if (Start == (time_t) -1) | |
| 975 return Start; | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
976 } |
|
855
9c89b90524b8
(get_date): Change prototype to reflect const'ness of parameters.
Jim Meyering <jim@meyering.net>
parents:
852
diff
changeset
|
977 |
| 857 | 978 if (yyHaveDay && !yyHaveDate) |
| 979 { | |
| 980 tm.tm_mday += ((yyDayNumber - tm.tm_wday + 7) % 7 | |
| 981 + 7 * (yyDayOrdinal - (0 < yyDayOrdinal))); | |
| 982 Start = mktime (&tm); | |
| 983 if (Start == (time_t) -1) | |
| 984 return Start; | |
| 985 } | |
| 9 | 986 |
| 857 | 987 if (yyHaveZone) |
| 988 { | |
| 989 long delta = yyTimezone * 60L + difftm (&tm, gmtime (&Start)); | |
| 990 if ((Start + delta < Start) != (delta < 0)) | |
| 991 return -1; /* time_t overflow */ | |
| 992 Start += delta; | |
| 993 } | |
|
852
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
994 |
|
2156a43352c1
1997-01-06 Paul Eggert <eggert@twinsun.com>
Jim Meyering <jim@meyering.net>
parents:
814
diff
changeset
|
995 return Start; |
| 9 | 996 } |
| 997 | |
| 303 | 998 #if defined (TEST) |
| 9 | 999 |
| 1000 /* ARGSUSED */ | |
| 202 | 1001 int |
| 303 | 1002 main (ac, av) |
| 857 | 1003 int ac; |
| 1004 char *av[]; | |
| 9 | 1005 { |
| 321 | 1006 char buff[MAX_BUFF_LEN + 1]; |
| 1007 time_t d; | |
| 9 | 1008 |
| 857 | 1009 (void) printf ("Enter date, or blank line to exit.\n\t> "); |
| 1010 (void) fflush (stdout); | |
| 321 | 1011 |
| 1012 buff[MAX_BUFF_LEN] = 0; | |
| 857 | 1013 while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0]) |
| 1014 { | |
| 1015 d = get_date (buff, (time_t *) NULL); | |
| 1016 if (d == -1) | |
| 1017 (void) printf ("Bad format - couldn't convert.\n"); | |
| 1018 else | |
| 1019 (void) printf ("%s", ctime (&d)); | |
| 1020 (void) printf ("\t> "); | |
| 1021 (void) fflush (stdout); | |
| 1022 } | |
| 303 | 1023 exit (0); |
| 1024 /* NOTREACHED */ | |
| 9 | 1025 } |
| 857 | 1026 #endif /* defined (TEST) */ |