/[dtapublic]/projs/trunk/shared_source/c_tcl_base_7_5_w_mods/strftime.c
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Revision 44 - (show annotations) (download)
Fri Oct 14 02:09:58 2016 UTC (7 years, 9 months ago) by dashley
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File size: 10457 byte(s)
Rename for reorganization.
1 /* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/strftime.c,v 1.1.1.1 2001/06/13 04:32:38 dtashley Exp $ */
2
3 /*
4 * strftime.c --
5 *
6 * This file contains a modified version of the BSD 4.4 strftime
7 * function.
8 *
9 * This file is a modified version of the strftime.c file from the BSD 4.4
10 * source. See the copyright notice below for details on redistribution
11 * restrictions. The "license.terms" file does not apply to this file.
12 *
13 * RCS: @(#) $Id: strftime.c,v 1.1.1.1 2001/06/13 04:32:38 dtashley Exp $
14 */
15
16 /*
17 * Copyright (c) 1989 The Regents of the University of California.
18 * All rights reserved.
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 * 3. All advertising materials mentioning features or use of this software
29 * must display the following acknowledgement:
30 * This product includes software developed by the University of
31 * California, Berkeley and its contributors.
32 * 4. Neither the name of the University nor the names of its contributors
33 * may be used to endorse or promote products derived from this software
34 * without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
39 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 */
48
49 #if defined(LIBC_SCCS)
50 static char *rcsid = "$Id: strftime.c,v 1.1.1.1 2001/06/13 04:32:38 dtashley Exp $";
51 #endif /* LIBC_SCCS */
52
53 #include <time.h>
54 #include <string.h>
55 #include <locale.h>
56 #include "tclInt.h"
57 #include "tclPort.h"
58
59 #define TM_YEAR_BASE 1900
60 #define IsLeapYear(x) ((x % 4 == 0) && (x % 100 != 0 || x % 400 == 0))
61
62 typedef struct {
63 const char *abday[7];
64 const char *day[7];
65 const char *abmon[12];
66 const char *mon[12];
67 const char *am_pm[2];
68 const char *d_t_fmt;
69 const char *d_fmt;
70 const char *t_fmt;
71 const char *t_fmt_ampm;
72 } _TimeLocale;
73
74 static const _TimeLocale _DefaultTimeLocale =
75 {
76 {
77 "Sun","Mon","Tue","Wed","Thu","Fri","Sat",
78 },
79 {
80 "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday",
81 "Friday", "Saturday"
82 },
83 {
84 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
85 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
86 },
87 {
88 "January", "February", "March", "April", "May", "June", "July",
89 "August", "September", "October", "November", "December"
90 },
91 {
92 "AM", "PM"
93 },
94 "%a %b %d %H:%M:%S %Y",
95 "%m/%d/%y",
96 "%H:%M:%S",
97 "%I:%M:%S %p"
98 };
99
100 static const _TimeLocale *_CurrentTimeLocale = &_DefaultTimeLocale;
101
102 static size_t gsize;
103 static char *pt;
104 static int _add _ANSI_ARGS_((const char* str));
105 static int _conv _ANSI_ARGS_((int n, int digits, int pad));
106 static int _secs _ANSI_ARGS_((const struct tm *t));
107 static size_t _fmt _ANSI_ARGS_((const char *format,
108 const struct tm *t));
109
110 size_t
111 TclpStrftime(s, maxsize, format, t)
112 char *s;
113 size_t maxsize;
114 const char *format;
115 const struct tm *t;
116 {
117 if (format[0] == '%' && format[1] == 'Q') {
118 /* Format as a stardate */
119 sprintf(s, "Stardate %2d%03d.%01d",
120 (((t->tm_year + TM_YEAR_BASE) + 377) - 2323),
121 (((t->tm_yday + 1) * 1000) /
122 (365 + IsLeapYear((t->tm_year + TM_YEAR_BASE)))),
123 (((t->tm_hour * 60) + t->tm_min)/144));
124 return(strlen(s));
125 }
126
127 tzset();
128
129 pt = s;
130 if ((gsize = maxsize) < 1)
131 return(0);
132 if (_fmt(format, t)) {
133 *pt = '\0';
134 return(maxsize - gsize);
135 }
136 return(0);
137 }
138
139 #define SUN_WEEK(t) (((t)->tm_yday + 7 - \
140 ((t)->tm_wday)) / 7)
141 #define MON_WEEK(t) (((t)->tm_yday + 7 - \
142 ((t)->tm_wday ? (t)->tm_wday - 1 : 6)) / 7)
143
144 static size_t
145 _fmt(format, t)
146 const char *format;
147 const struct tm *t;
148 {
149 for (; *format; ++format) {
150 if (*format == '%') {
151 ++format;
152 if (*format == 'E') {
153 /* Alternate Era */
154 ++format;
155 } else if (*format == 'O') {
156 /* Alternate numeric symbols */
157 ++format;
158 }
159 switch(*format) {
160 case '\0':
161 --format;
162 break;
163 case 'A':
164 if (t->tm_wday < 0 || t->tm_wday > 6)
165 return(0);
166 if (!_add(_CurrentTimeLocale->day[t->tm_wday]))
167 return(0);
168 continue;
169 case 'a':
170 if (t->tm_wday < 0 || t->tm_wday > 6)
171 return(0);
172 if (!_add(_CurrentTimeLocale->abday[t->tm_wday]))
173 return(0);
174 continue;
175 case 'B':
176 if (t->tm_mon < 0 || t->tm_mon > 11)
177 return(0);
178 if (!_add(_CurrentTimeLocale->mon[t->tm_mon]))
179 return(0);
180 continue;
181 case 'b':
182 case 'h':
183 if (t->tm_mon < 0 || t->tm_mon > 11)
184 return(0);
185 if (!_add(_CurrentTimeLocale->abmon[t->tm_mon]))
186 return(0);
187 continue;
188 case 'C':
189 if (!_conv((t->tm_year + TM_YEAR_BASE) / 100,
190 2, '0'))
191 return(0);
192 continue;
193 case 'c':
194 if (!_fmt(_CurrentTimeLocale->d_t_fmt, t))
195 return(0);
196 continue;
197 case 'D':
198 if (!_fmt("%m/%d/%y", t))
199 return(0);
200 continue;
201 case 'd':
202 if (!_conv(t->tm_mday, 2, '0'))
203 return(0);
204 continue;
205 case 'e':
206 if (!_conv(t->tm_mday, 2, ' '))
207 return(0);
208 continue;
209 case 'H':
210 if (!_conv(t->tm_hour, 2, '0'))
211 return(0);
212 continue;
213 case 'I':
214 if (!_conv(t->tm_hour % 12 ?
215 t->tm_hour % 12 : 12, 2, '0'))
216 return(0);
217 continue;
218 case 'j':
219 if (!_conv(t->tm_yday + 1, 3, '0'))
220 return(0);
221 continue;
222 case 'k':
223 if (!_conv(t->tm_hour, 2, ' '))
224 return(0);
225 continue;
226 case 'l':
227 if (!_conv(t->tm_hour % 12 ?
228 t->tm_hour % 12: 12, 2, ' '))
229 return(0);
230 continue;
231 case 'M':
232 if (!_conv(t->tm_min, 2, '0'))
233 return(0);
234 continue;
235 case 'm':
236 if (!_conv(t->tm_mon + 1, 2, '0'))
237 return(0);
238 continue;
239 case 'n':
240 if (!_add("\n"))
241 return(0);
242 continue;
243 case 'p':
244 if (!_add(_CurrentTimeLocale->am_pm[t->tm_hour >= 12]))
245 return(0);
246 continue;
247 case 'R':
248 if (!_fmt("%H:%M", t))
249 return(0);
250 continue;
251 case 'r':
252 if (!_fmt(_CurrentTimeLocale->t_fmt_ampm, t))
253 return(0);
254 continue;
255 case 'S':
256 if (!_conv(t->tm_sec, 2, '0'))
257 return(0);
258 continue;
259 case 's':
260 if (!_secs(t))
261 return(0);
262 continue;
263 case 'T':
264 if (!_fmt("%H:%M:%S", t))
265 return(0);
266 continue;
267 case 't':
268 if (!_add("\t"))
269 return(0);
270 continue;
271 case 'U':
272 if (!_conv(SUN_WEEK(t), 2, '0'))
273 return(0);
274 continue;
275 case 'u':
276 if (!_conv(t->tm_wday ? t->tm_wday : 7, 1, '0'))
277 return(0);
278 continue;
279 case 'V':
280 {
281 /* ISO 8601 Week Of Year:
282 If the week (Monday - Sunday) containing
283 January 1 has four or more days in the new
284 year, then it is week 1; otherwise it is
285 week 53 of the previous year and the next
286 week is week one. */
287
288 int week = MON_WEEK(t);
289
290 int days = (((t)->tm_yday + 7 - \
291 ((t)->tm_wday ? (t)->tm_wday - 1 : 6)) % 7);
292
293
294 if (days >= 4) {
295 week++;
296 } else if (week == 0) {
297 week = 53;
298 }
299
300 if (!_conv(week, 2, '0'))
301 return(0);
302 continue;
303 }
304 case 'W':
305 if (!_conv(MON_WEEK(t), 2, '0'))
306 return(0);
307 continue;
308 case 'w':
309 if (!_conv(t->tm_wday, 1, '0'))
310 return(0);
311 continue;
312 case 'x':
313 if (!_fmt(_CurrentTimeLocale->d_fmt, t))
314 return(0);
315 continue;
316 case 'X':
317 if (!_fmt(_CurrentTimeLocale->t_fmt, t))
318 return(0);
319 continue;
320 case 'y':
321 if (!_conv((t->tm_year + TM_YEAR_BASE) % 100,
322 2, '0'))
323 return(0);
324 continue;
325 case 'Y':
326 if (!_conv((t->tm_year + TM_YEAR_BASE), 4, '0'))
327 return(0);
328 continue;
329 #ifndef MAC_TCL
330 case 'Z': {
331 char *name = TclpGetTZName(t->tm_isdst);
332 if (name && !_add(name)) {
333 return 0;
334 }
335 continue;
336 }
337 #endif
338 case '%':
339 /*
340 * X311J/88-090 (4.12.3.5): if conversion char is
341 * undefined, behavior is undefined. Print out the
342 * character itself as printf(3) does.
343 */
344 default:
345 break;
346 }
347 }
348 if (!gsize--)
349 return(0);
350 *pt++ = *format;
351 }
352 return(gsize);
353 }
354
355 static int
356 _secs(t)
357 const struct tm *t;
358 {
359 static char buf[15];
360 register time_t s;
361 register char *p;
362 struct tm tmp;
363
364 /* Make a copy, mktime(3) modifies the tm struct. */
365 tmp = *t;
366 s = mktime(&tmp);
367 for (p = buf + sizeof(buf) - 2; s > 0 && p > buf; s /= 10)
368 *p-- = (char)(s % 10 + '0');
369 return(_add(++p));
370 }
371
372 static int
373 _conv(n, digits, pad)
374 int n, digits;
375 int pad;
376 {
377 static char buf[10];
378 register char *p;
379
380 for (p = buf + sizeof(buf) - 2; n > 0 && p > buf; n /= 10, --digits)
381 *p-- = (char)(n % 10 + '0');
382 while (p > buf && digits-- > 0)
383 *p-- = (char) pad;
384 return(_add(++p));
385 }
386
387 static int
388 _add(str)
389 const char *str;
390 {
391 for (;; ++pt, --gsize) {
392 if (!gsize)
393 return(0);
394 if (!(*pt = *str++))
395 return(1);
396 }
397 }
398
399 /* $History: strftime.c $
400 *
401 * ***************** Version 1 *****************
402 * User: Dtashley Date: 1/02/01 Time: 12:17a
403 * Created in $/IjuScripter, IjuConsole/Source/Tcl Base
404 * Initial check-in.
405 */
406
407 /* End of STRFTIME.C */

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