xref: /aosp_15_r20/bionic/libc/tzcode/strftime.c (revision 8d67ca893c1523eb926b9080dbe4e2ffd2a27ba1)
1*8d67ca89SAndroid Build Coastguard Worker /* Convert a broken-down timestamp to a string.  */
2*8d67ca89SAndroid Build Coastguard Worker 
3*8d67ca89SAndroid Build Coastguard Worker /* Copyright 1989 The Regents of the University of California.
4*8d67ca89SAndroid Build Coastguard Worker    All rights reserved.
5*8d67ca89SAndroid Build Coastguard Worker 
6*8d67ca89SAndroid Build Coastguard Worker    Redistribution and use in source and binary forms, with or without
7*8d67ca89SAndroid Build Coastguard Worker    modification, are permitted provided that the following conditions
8*8d67ca89SAndroid Build Coastguard Worker    are met:
9*8d67ca89SAndroid Build Coastguard Worker    1. Redistributions of source code must retain the above copyright
10*8d67ca89SAndroid Build Coastguard Worker       notice, this list of conditions and the following disclaimer.
11*8d67ca89SAndroid Build Coastguard Worker    2. Redistributions in binary form must reproduce the above copyright
12*8d67ca89SAndroid Build Coastguard Worker       notice, this list of conditions and the following disclaimer in the
13*8d67ca89SAndroid Build Coastguard Worker       documentation and/or other materials provided with the distribution.
14*8d67ca89SAndroid Build Coastguard Worker    3. Neither the name of the University nor the names of its contributors
15*8d67ca89SAndroid Build Coastguard Worker       may be used to endorse or promote products derived from this software
16*8d67ca89SAndroid Build Coastguard Worker       without specific prior written permission.
17*8d67ca89SAndroid Build Coastguard Worker 
18*8d67ca89SAndroid Build Coastguard Worker    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND
19*8d67ca89SAndroid Build Coastguard Worker    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20*8d67ca89SAndroid Build Coastguard Worker    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21*8d67ca89SAndroid Build Coastguard Worker    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22*8d67ca89SAndroid Build Coastguard Worker    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23*8d67ca89SAndroid Build Coastguard Worker    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24*8d67ca89SAndroid Build Coastguard Worker    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25*8d67ca89SAndroid Build Coastguard Worker    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26*8d67ca89SAndroid Build Coastguard Worker    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27*8d67ca89SAndroid Build Coastguard Worker    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28*8d67ca89SAndroid Build Coastguard Worker    SUCH DAMAGE.  */
29*8d67ca89SAndroid Build Coastguard Worker 
30*8d67ca89SAndroid Build Coastguard Worker /*
31*8d67ca89SAndroid Build Coastguard Worker ** Based on the UCB version with the copyright notice appearing above.
32*8d67ca89SAndroid Build Coastguard Worker **
33*8d67ca89SAndroid Build Coastguard Worker ** This is ANSIish only when "multibyte character == plain character".
34*8d67ca89SAndroid Build Coastguard Worker */
35*8d67ca89SAndroid Build Coastguard Worker 
36*8d67ca89SAndroid Build Coastguard Worker #include "private.h"
37*8d67ca89SAndroid Build Coastguard Worker 
38*8d67ca89SAndroid Build Coastguard Worker #include <fcntl.h>
39*8d67ca89SAndroid Build Coastguard Worker #include <locale.h>
40*8d67ca89SAndroid Build Coastguard Worker #include <stdio.h>
41*8d67ca89SAndroid Build Coastguard Worker 
42*8d67ca89SAndroid Build Coastguard Worker #ifndef DEPRECATE_TWO_DIGIT_YEARS
43*8d67ca89SAndroid Build Coastguard Worker # define DEPRECATE_TWO_DIGIT_YEARS false
44*8d67ca89SAndroid Build Coastguard Worker #endif
45*8d67ca89SAndroid Build Coastguard Worker 
46*8d67ca89SAndroid Build Coastguard Worker #if defined(__BIONIC__)
47*8d67ca89SAndroid Build Coastguard Worker 
48*8d67ca89SAndroid Build Coastguard Worker /* LP32 had a 32-bit time_t, so we need to work around that here. */
49*8d67ca89SAndroid Build Coastguard Worker #if defined(__LP64__)
50*8d67ca89SAndroid Build Coastguard Worker #define time64_t time_t
51*8d67ca89SAndroid Build Coastguard Worker #define mktime64 mktime
52*8d67ca89SAndroid Build Coastguard Worker #define localtime64_r localtime_r
53*8d67ca89SAndroid Build Coastguard Worker #else
54*8d67ca89SAndroid Build Coastguard Worker #include <time64.h>
55*8d67ca89SAndroid Build Coastguard Worker #endif
56*8d67ca89SAndroid Build Coastguard Worker 
57*8d67ca89SAndroid Build Coastguard Worker #include <ctype.h>
58*8d67ca89SAndroid Build Coastguard Worker 
59*8d67ca89SAndroid Build Coastguard Worker #endif
60*8d67ca89SAndroid Build Coastguard Worker 
61*8d67ca89SAndroid Build Coastguard Worker struct lc_time_T {
62*8d67ca89SAndroid Build Coastguard Worker     const char *    mon[MONSPERYEAR];
63*8d67ca89SAndroid Build Coastguard Worker     const char *    month[MONSPERYEAR];
64*8d67ca89SAndroid Build Coastguard Worker     const char *    wday[DAYSPERWEEK];
65*8d67ca89SAndroid Build Coastguard Worker     const char *    weekday[DAYSPERWEEK];
66*8d67ca89SAndroid Build Coastguard Worker     const char *    X_fmt;
67*8d67ca89SAndroid Build Coastguard Worker     const char *    x_fmt;
68*8d67ca89SAndroid Build Coastguard Worker     const char *    c_fmt;
69*8d67ca89SAndroid Build Coastguard Worker     const char *    am;
70*8d67ca89SAndroid Build Coastguard Worker     const char *    pm;
71*8d67ca89SAndroid Build Coastguard Worker     const char *    date_fmt;
72*8d67ca89SAndroid Build Coastguard Worker };
73*8d67ca89SAndroid Build Coastguard Worker 
74*8d67ca89SAndroid Build Coastguard Worker static const struct lc_time_T   C_time_locale = {
75*8d67ca89SAndroid Build Coastguard Worker     {
76*8d67ca89SAndroid Build Coastguard Worker         "Jan", "Feb", "Mar", "Apr", "May", "Jun",
77*8d67ca89SAndroid Build Coastguard Worker         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
78*8d67ca89SAndroid Build Coastguard Worker     }, {
79*8d67ca89SAndroid Build Coastguard Worker         "January", "February", "March", "April", "May", "June",
80*8d67ca89SAndroid Build Coastguard Worker         "July", "August", "September", "October", "November", "December"
81*8d67ca89SAndroid Build Coastguard Worker     }, {
82*8d67ca89SAndroid Build Coastguard Worker         "Sun", "Mon", "Tue", "Wed",
83*8d67ca89SAndroid Build Coastguard Worker         "Thu", "Fri", "Sat"
84*8d67ca89SAndroid Build Coastguard Worker     }, {
85*8d67ca89SAndroid Build Coastguard Worker         "Sunday", "Monday", "Tuesday", "Wednesday",
86*8d67ca89SAndroid Build Coastguard Worker         "Thursday", "Friday", "Saturday"
87*8d67ca89SAndroid Build Coastguard Worker     },
88*8d67ca89SAndroid Build Coastguard Worker 
89*8d67ca89SAndroid Build Coastguard Worker     /* X_fmt */
90*8d67ca89SAndroid Build Coastguard Worker     "%H:%M:%S",
91*8d67ca89SAndroid Build Coastguard Worker 
92*8d67ca89SAndroid Build Coastguard Worker     /*
93*8d67ca89SAndroid Build Coastguard Worker     ** x_fmt
94*8d67ca89SAndroid Build Coastguard Worker     ** C99 and later require this format.
95*8d67ca89SAndroid Build Coastguard Worker     ** Using just numbers (as here) makes Quakers happier;
96*8d67ca89SAndroid Build Coastguard Worker     ** it's also compatible with SVR4.
97*8d67ca89SAndroid Build Coastguard Worker     */
98*8d67ca89SAndroid Build Coastguard Worker     "%m/%d/%y",
99*8d67ca89SAndroid Build Coastguard Worker 
100*8d67ca89SAndroid Build Coastguard Worker     /*
101*8d67ca89SAndroid Build Coastguard Worker     ** c_fmt
102*8d67ca89SAndroid Build Coastguard Worker     ** C99 and later require this format.
103*8d67ca89SAndroid Build Coastguard Worker     ** Previously this code used "%D %X", but we now conform to C99.
104*8d67ca89SAndroid Build Coastguard Worker     ** Note that
105*8d67ca89SAndroid Build Coastguard Worker     **  "%a %b %d %H:%M:%S %Y"
106*8d67ca89SAndroid Build Coastguard Worker     ** is used by Solaris 2.3.
107*8d67ca89SAndroid Build Coastguard Worker     */
108*8d67ca89SAndroid Build Coastguard Worker     "%a %b %e %T %Y",
109*8d67ca89SAndroid Build Coastguard Worker 
110*8d67ca89SAndroid Build Coastguard Worker     /* am */
111*8d67ca89SAndroid Build Coastguard Worker     "AM",
112*8d67ca89SAndroid Build Coastguard Worker 
113*8d67ca89SAndroid Build Coastguard Worker     /* pm */
114*8d67ca89SAndroid Build Coastguard Worker     "PM",
115*8d67ca89SAndroid Build Coastguard Worker 
116*8d67ca89SAndroid Build Coastguard Worker     /* date_fmt */
117*8d67ca89SAndroid Build Coastguard Worker     "%a %b %e %H:%M:%S %Z %Y"
118*8d67ca89SAndroid Build Coastguard Worker };
119*8d67ca89SAndroid Build Coastguard Worker 
120*8d67ca89SAndroid Build Coastguard Worker enum warn { IN_NONE, IN_SOME, IN_THIS, IN_ALL };
121*8d67ca89SAndroid Build Coastguard Worker 
122*8d67ca89SAndroid Build Coastguard Worker static char *   _add(const char *, char *, const char *, int);
123*8d67ca89SAndroid Build Coastguard Worker static char *   _conv(int, const char *, char *, const char *);
124*8d67ca89SAndroid Build Coastguard Worker static char *   _fmt(const char *, const struct tm *, char *, const char *,
125*8d67ca89SAndroid Build Coastguard Worker             enum warn *);
126*8d67ca89SAndroid Build Coastguard Worker static char *   _yconv(int, int, bool, bool, char *, const char *, int);
127*8d67ca89SAndroid Build Coastguard Worker 
128*8d67ca89SAndroid Build Coastguard Worker #ifndef YEAR_2000_NAME
129*8d67ca89SAndroid Build Coastguard Worker # define YEAR_2000_NAME  "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS"
130*8d67ca89SAndroid Build Coastguard Worker #endif /* !defined YEAR_2000_NAME */
131*8d67ca89SAndroid Build Coastguard Worker 
132*8d67ca89SAndroid Build Coastguard Worker #if HAVE_STRFTIME_L
133*8d67ca89SAndroid Build Coastguard Worker size_t
strftime_l(char * restrict s,size_t maxsize,char const * restrict format,struct tm const * restrict t,ATTRIBUTE_MAYBE_UNUSED locale_t locale)134*8d67ca89SAndroid Build Coastguard Worker strftime_l(char *restrict s, size_t maxsize, char const *restrict format,
135*8d67ca89SAndroid Build Coastguard Worker 	   struct tm const *restrict t,
136*8d67ca89SAndroid Build Coastguard Worker 	   ATTRIBUTE_MAYBE_UNUSED locale_t locale)
137*8d67ca89SAndroid Build Coastguard Worker {
138*8d67ca89SAndroid Build Coastguard Worker   /* Just call strftime, as only the C locale is supported.  */
139*8d67ca89SAndroid Build Coastguard Worker   return strftime(s, maxsize, format, t);
140*8d67ca89SAndroid Build Coastguard Worker }
141*8d67ca89SAndroid Build Coastguard Worker #endif
142*8d67ca89SAndroid Build Coastguard Worker 
143*8d67ca89SAndroid Build Coastguard Worker #define FORCE_LOWER_CASE 0x100 /* Android extension. */
144*8d67ca89SAndroid Build Coastguard Worker 
145*8d67ca89SAndroid Build Coastguard Worker size_t
strftime(char * restrict s,size_t maxsize,char const * restrict format,struct tm const * restrict t)146*8d67ca89SAndroid Build Coastguard Worker strftime(char *restrict s, size_t maxsize, char const *restrict format,
147*8d67ca89SAndroid Build Coastguard Worker 	 struct tm const *restrict t)
148*8d67ca89SAndroid Build Coastguard Worker {
149*8d67ca89SAndroid Build Coastguard Worker     char *  p;
150*8d67ca89SAndroid Build Coastguard Worker     int saved_errno = errno;
151*8d67ca89SAndroid Build Coastguard Worker     enum warn warn = IN_NONE;
152*8d67ca89SAndroid Build Coastguard Worker 
153*8d67ca89SAndroid Build Coastguard Worker     tzset();
154*8d67ca89SAndroid Build Coastguard Worker     p = _fmt(format, t, s, s + maxsize, &warn);
155*8d67ca89SAndroid Build Coastguard Worker     if (!p) {
156*8d67ca89SAndroid Build Coastguard Worker        errno = EOVERFLOW;
157*8d67ca89SAndroid Build Coastguard Worker        return 0;
158*8d67ca89SAndroid Build Coastguard Worker     }
159*8d67ca89SAndroid Build Coastguard Worker     if (DEPRECATE_TWO_DIGIT_YEARS
160*8d67ca89SAndroid Build Coastguard Worker           && warn != IN_NONE && getenv(YEAR_2000_NAME)) {
161*8d67ca89SAndroid Build Coastguard Worker         fprintf(stderr, "\n");
162*8d67ca89SAndroid Build Coastguard Worker         fprintf(stderr, "strftime format \"%s\" ", format);
163*8d67ca89SAndroid Build Coastguard Worker         fprintf(stderr, "yields only two digits of years in ");
164*8d67ca89SAndroid Build Coastguard Worker         if (warn == IN_SOME)
165*8d67ca89SAndroid Build Coastguard Worker             fprintf(stderr, "some locales");
166*8d67ca89SAndroid Build Coastguard Worker         else if (warn == IN_THIS)
167*8d67ca89SAndroid Build Coastguard Worker             fprintf(stderr, "the current locale");
168*8d67ca89SAndroid Build Coastguard Worker         else    fprintf(stderr, "all locales");
169*8d67ca89SAndroid Build Coastguard Worker         fprintf(stderr, "\n");
170*8d67ca89SAndroid Build Coastguard Worker     }
171*8d67ca89SAndroid Build Coastguard Worker     if (p == s + maxsize) {
172*8d67ca89SAndroid Build Coastguard Worker         errno = ERANGE;
173*8d67ca89SAndroid Build Coastguard Worker         return 0;
174*8d67ca89SAndroid Build Coastguard Worker     }
175*8d67ca89SAndroid Build Coastguard Worker     *p = '\0';
176*8d67ca89SAndroid Build Coastguard Worker     errno = saved_errno;
177*8d67ca89SAndroid Build Coastguard Worker     return p - s;
178*8d67ca89SAndroid Build Coastguard Worker }
179*8d67ca89SAndroid Build Coastguard Worker 
getformat(int modifier,char * normal,char * underscore,char * dash,char * zero)180*8d67ca89SAndroid Build Coastguard Worker static char *getformat(int modifier, char *normal, char *underscore,
181*8d67ca89SAndroid Build Coastguard Worker                        char *dash, char *zero) {
182*8d67ca89SAndroid Build Coastguard Worker     switch (modifier) {
183*8d67ca89SAndroid Build Coastguard Worker     case '_':
184*8d67ca89SAndroid Build Coastguard Worker         return underscore;
185*8d67ca89SAndroid Build Coastguard Worker     case '-':
186*8d67ca89SAndroid Build Coastguard Worker         return dash;
187*8d67ca89SAndroid Build Coastguard Worker     case '0':
188*8d67ca89SAndroid Build Coastguard Worker         return zero;
189*8d67ca89SAndroid Build Coastguard Worker     }
190*8d67ca89SAndroid Build Coastguard Worker     return normal;
191*8d67ca89SAndroid Build Coastguard Worker }
192*8d67ca89SAndroid Build Coastguard Worker 
193*8d67ca89SAndroid Build Coastguard Worker // Android-added: fall back mechanism when TM_ZONE is not initialized.
194*8d67ca89SAndroid Build Coastguard Worker #ifdef TM_ZONE
_safe_tm_zone(const struct tm * tm)195*8d67ca89SAndroid Build Coastguard Worker static const char* _safe_tm_zone(const struct tm* tm) {
196*8d67ca89SAndroid Build Coastguard Worker   const char* zone = tm->TM_ZONE;
197*8d67ca89SAndroid Build Coastguard Worker   if (!zone || !*zone) {
198*8d67ca89SAndroid Build Coastguard Worker     // "The value of tm_isdst shall be positive if Daylight Savings Time is
199*8d67ca89SAndroid Build Coastguard Worker     // in effect, 0 if Daylight Savings Time is not in effect, and negative
200*8d67ca89SAndroid Build Coastguard Worker     // if the information is not available."
201*8d67ca89SAndroid Build Coastguard Worker     if (tm->tm_isdst == 0) {
202*8d67ca89SAndroid Build Coastguard Worker       zone = tzname[0];
203*8d67ca89SAndroid Build Coastguard Worker     } else if (tm->tm_isdst > 0) {
204*8d67ca89SAndroid Build Coastguard Worker       zone = tzname[1];
205*8d67ca89SAndroid Build Coastguard Worker     }
206*8d67ca89SAndroid Build Coastguard Worker 
207*8d67ca89SAndroid Build Coastguard Worker     // "Replaced by the timezone name or abbreviation, or by no bytes if no
208*8d67ca89SAndroid Build Coastguard Worker     // timezone information exists."
209*8d67ca89SAndroid Build Coastguard Worker     if (!zone || !*zone) zone = "";
210*8d67ca89SAndroid Build Coastguard Worker   }
211*8d67ca89SAndroid Build Coastguard Worker 
212*8d67ca89SAndroid Build Coastguard Worker   return zone;
213*8d67ca89SAndroid Build Coastguard Worker }
214*8d67ca89SAndroid Build Coastguard Worker #endif
215*8d67ca89SAndroid Build Coastguard Worker 
216*8d67ca89SAndroid Build Coastguard Worker static char *
_fmt(const char * format,const struct tm * t,char * pt,const char * ptlim,enum warn * warnp)217*8d67ca89SAndroid Build Coastguard Worker _fmt(const char *format, const struct tm *t, char *pt,
218*8d67ca89SAndroid Build Coastguard Worker         const char *ptlim, enum warn *warnp)
219*8d67ca89SAndroid Build Coastguard Worker {
220*8d67ca89SAndroid Build Coastguard Worker 	struct lc_time_T const *Locale = &C_time_locale;
221*8d67ca89SAndroid Build Coastguard Worker 
222*8d67ca89SAndroid Build Coastguard Worker     for ( ; *format; ++format) {
223*8d67ca89SAndroid Build Coastguard Worker         if (*format == '%') {
224*8d67ca89SAndroid Build Coastguard Worker             int modifier = 0;
225*8d67ca89SAndroid Build Coastguard Worker label:
226*8d67ca89SAndroid Build Coastguard Worker             switch (*++format) {
227*8d67ca89SAndroid Build Coastguard Worker             case '\0':
228*8d67ca89SAndroid Build Coastguard Worker                 --format;
229*8d67ca89SAndroid Build Coastguard Worker                 break;
230*8d67ca89SAndroid Build Coastguard Worker             case 'A':
231*8d67ca89SAndroid Build Coastguard Worker                 pt = _add((t->tm_wday < 0 ||
232*8d67ca89SAndroid Build Coastguard Worker                     t->tm_wday >= DAYSPERWEEK) ?
233*8d67ca89SAndroid Build Coastguard Worker                     "?" : Locale->weekday[t->tm_wday],
234*8d67ca89SAndroid Build Coastguard Worker                     pt, ptlim, modifier);
235*8d67ca89SAndroid Build Coastguard Worker                 continue;
236*8d67ca89SAndroid Build Coastguard Worker             case 'a':
237*8d67ca89SAndroid Build Coastguard Worker                 pt = _add((t->tm_wday < 0 ||
238*8d67ca89SAndroid Build Coastguard Worker                     t->tm_wday >= DAYSPERWEEK) ?
239*8d67ca89SAndroid Build Coastguard Worker                     "?" : Locale->wday[t->tm_wday],
240*8d67ca89SAndroid Build Coastguard Worker                     pt, ptlim, modifier);
241*8d67ca89SAndroid Build Coastguard Worker                 continue;
242*8d67ca89SAndroid Build Coastguard Worker             case 'B':
243*8d67ca89SAndroid Build Coastguard Worker                 pt = _add((t->tm_mon < 0 ||
244*8d67ca89SAndroid Build Coastguard Worker                                 t->tm_mon >= MONSPERYEAR) ?
245*8d67ca89SAndroid Build Coastguard Worker                                 "?" : Locale->month[t->tm_mon],
246*8d67ca89SAndroid Build Coastguard Worker                                 pt, ptlim, modifier);
247*8d67ca89SAndroid Build Coastguard Worker                 continue;
248*8d67ca89SAndroid Build Coastguard Worker             case 'b':
249*8d67ca89SAndroid Build Coastguard Worker             case 'h':
250*8d67ca89SAndroid Build Coastguard Worker                 pt = _add((t->tm_mon < 0 ||
251*8d67ca89SAndroid Build Coastguard Worker                     t->tm_mon >= MONSPERYEAR) ?
252*8d67ca89SAndroid Build Coastguard Worker                     "?" : Locale->mon[t->tm_mon],
253*8d67ca89SAndroid Build Coastguard Worker                     pt, ptlim, modifier);
254*8d67ca89SAndroid Build Coastguard Worker                 continue;
255*8d67ca89SAndroid Build Coastguard Worker             case 'C':
256*8d67ca89SAndroid Build Coastguard Worker                 /*
257*8d67ca89SAndroid Build Coastguard Worker                 ** %C used to do a...
258*8d67ca89SAndroid Build Coastguard Worker                 **  _fmt("%a %b %e %X %Y", t);
259*8d67ca89SAndroid Build Coastguard Worker                 ** ...whereas now POSIX 1003.2 calls for
260*8d67ca89SAndroid Build Coastguard Worker                 ** something completely different.
261*8d67ca89SAndroid Build Coastguard Worker                 ** (ado, 1993-05-24)
262*8d67ca89SAndroid Build Coastguard Worker                 */
263*8d67ca89SAndroid Build Coastguard Worker                 pt = _yconv(t->tm_year, TM_YEAR_BASE,
264*8d67ca89SAndroid Build Coastguard Worker                     true, false, pt, ptlim, modifier);
265*8d67ca89SAndroid Build Coastguard Worker                 continue;
266*8d67ca89SAndroid Build Coastguard Worker             case 'c':
267*8d67ca89SAndroid Build Coastguard Worker                 {
268*8d67ca89SAndroid Build Coastguard Worker                 enum warn warn2 = IN_SOME;
269*8d67ca89SAndroid Build Coastguard Worker 
270*8d67ca89SAndroid Build Coastguard Worker                 pt = _fmt(Locale->c_fmt, t, pt, ptlim, &warn2);
271*8d67ca89SAndroid Build Coastguard Worker                 if (warn2 == IN_ALL)
272*8d67ca89SAndroid Build Coastguard Worker                     warn2 = IN_THIS;
273*8d67ca89SAndroid Build Coastguard Worker                 if (warn2 > *warnp)
274*8d67ca89SAndroid Build Coastguard Worker                     *warnp = warn2;
275*8d67ca89SAndroid Build Coastguard Worker                 }
276*8d67ca89SAndroid Build Coastguard Worker                 continue;
277*8d67ca89SAndroid Build Coastguard Worker             case 'D':
278*8d67ca89SAndroid Build Coastguard Worker                                 pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp);
279*8d67ca89SAndroid Build Coastguard Worker                 continue;
280*8d67ca89SAndroid Build Coastguard Worker             case 'd':
281*8d67ca89SAndroid Build Coastguard Worker               pt = _conv(t->tm_mday, getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
282*8d67ca89SAndroid Build Coastguard Worker               continue;
283*8d67ca89SAndroid Build Coastguard Worker             case 'E':
284*8d67ca89SAndroid Build Coastguard Worker             case 'O':
285*8d67ca89SAndroid Build Coastguard Worker                 /*
286*8d67ca89SAndroid Build Coastguard Worker                 ** Locale modifiers of C99 and later.
287*8d67ca89SAndroid Build Coastguard Worker                 ** The sequences
288*8d67ca89SAndroid Build Coastguard Worker                 **  %Ec %EC %Ex %EX %Ey %EY
289*8d67ca89SAndroid Build Coastguard Worker                 **  %Od %oe %OH %OI %Om %OM
290*8d67ca89SAndroid Build Coastguard Worker                 **  %OS %Ou %OU %OV %Ow %OW %Oy
291*8d67ca89SAndroid Build Coastguard Worker                 ** are supposed to provide alternative
292*8d67ca89SAndroid Build Coastguard Worker                 ** representations.
293*8d67ca89SAndroid Build Coastguard Worker                 */
294*8d67ca89SAndroid Build Coastguard Worker                 goto label;
295*8d67ca89SAndroid Build Coastguard Worker             case '_':
296*8d67ca89SAndroid Build Coastguard Worker             case '-':
297*8d67ca89SAndroid Build Coastguard Worker             case '0':
298*8d67ca89SAndroid Build Coastguard Worker             case '^':
299*8d67ca89SAndroid Build Coastguard Worker             case '#':
300*8d67ca89SAndroid Build Coastguard Worker                 modifier = *format;
301*8d67ca89SAndroid Build Coastguard Worker                 goto label;
302*8d67ca89SAndroid Build Coastguard Worker             case 'e':
303*8d67ca89SAndroid Build Coastguard Worker               pt = _conv(t->tm_mday, getformat(modifier, " 2", " 2", "  ", "02"), pt, ptlim);
304*8d67ca89SAndroid Build Coastguard Worker               continue;
305*8d67ca89SAndroid Build Coastguard Worker             case 'F':
306*8d67ca89SAndroid Build Coastguard Worker                 pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp);
307*8d67ca89SAndroid Build Coastguard Worker                 continue;
308*8d67ca89SAndroid Build Coastguard Worker             case 'H':
309*8d67ca89SAndroid Build Coastguard Worker               pt = _conv(t->tm_hour, getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
310*8d67ca89SAndroid Build Coastguard Worker               continue;
311*8d67ca89SAndroid Build Coastguard Worker             case 'I':
312*8d67ca89SAndroid Build Coastguard Worker               pt = _conv((t->tm_hour % 12) ? (t->tm_hour % 12) : 12,
313*8d67ca89SAndroid Build Coastguard Worker                          getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
314*8d67ca89SAndroid Build Coastguard Worker               continue;
315*8d67ca89SAndroid Build Coastguard Worker             case 'j':
316*8d67ca89SAndroid Build Coastguard Worker               pt = _conv(t->tm_yday + 1, getformat(modifier, "03", " 3", "  ", "03"), pt, ptlim);
317*8d67ca89SAndroid Build Coastguard Worker               continue;
318*8d67ca89SAndroid Build Coastguard Worker             case 'k':
319*8d67ca89SAndroid Build Coastguard Worker                 /*
320*8d67ca89SAndroid Build Coastguard Worker                 ** This used to be...
321*8d67ca89SAndroid Build Coastguard Worker                 **  _conv(t->tm_hour % 12 ?
322*8d67ca89SAndroid Build Coastguard Worker                 **      t->tm_hour % 12 : 12, 2, ' ');
323*8d67ca89SAndroid Build Coastguard Worker                 ** ...and has been changed to the below to
324*8d67ca89SAndroid Build Coastguard Worker                 ** match SunOS 4.1.1 and Arnold Robbins'
325*8d67ca89SAndroid Build Coastguard Worker                 ** strftime version 3.0. That is, "%k" and
326*8d67ca89SAndroid Build Coastguard Worker                 ** "%l" have been swapped.
327*8d67ca89SAndroid Build Coastguard Worker                 ** (ado, 1993-05-24)
328*8d67ca89SAndroid Build Coastguard Worker                 */
329*8d67ca89SAndroid Build Coastguard Worker                 pt = _conv(t->tm_hour, getformat(modifier, " 2", " 2", "  ", "02"), pt, ptlim);
330*8d67ca89SAndroid Build Coastguard Worker                 continue;
331*8d67ca89SAndroid Build Coastguard Worker #ifdef KITCHEN_SINK
332*8d67ca89SAndroid Build Coastguard Worker             case 'K':
333*8d67ca89SAndroid Build Coastguard Worker                 /*
334*8d67ca89SAndroid Build Coastguard Worker                 ** After all this time, still unclaimed!
335*8d67ca89SAndroid Build Coastguard Worker                 */
336*8d67ca89SAndroid Build Coastguard Worker                 pt = _add("kitchen sink", pt, ptlim);
337*8d67ca89SAndroid Build Coastguard Worker                 continue;
338*8d67ca89SAndroid Build Coastguard Worker #endif /* defined KITCHEN_SINK */
339*8d67ca89SAndroid Build Coastguard Worker             case 'l':
340*8d67ca89SAndroid Build Coastguard Worker                 /*
341*8d67ca89SAndroid Build Coastguard Worker                 ** This used to be...
342*8d67ca89SAndroid Build Coastguard Worker                 **  _conv(t->tm_hour, 2, ' ');
343*8d67ca89SAndroid Build Coastguard Worker                 ** ...and has been changed to the below to
344*8d67ca89SAndroid Build Coastguard Worker                 ** match SunOS 4.1.1 and Arnold Robbin's
345*8d67ca89SAndroid Build Coastguard Worker                 ** strftime version 3.0. That is, "%k" and
346*8d67ca89SAndroid Build Coastguard Worker                 ** "%l" have been swapped.
347*8d67ca89SAndroid Build Coastguard Worker                 ** (ado, 1993-05-24)
348*8d67ca89SAndroid Build Coastguard Worker                 */
349*8d67ca89SAndroid Build Coastguard Worker                 pt = _conv((t->tm_hour % 12) ? (t->tm_hour % 12) : 12,
350*8d67ca89SAndroid Build Coastguard Worker                            getformat(modifier, " 2", " 2", "  ", "02"), pt, ptlim);
351*8d67ca89SAndroid Build Coastguard Worker                 continue;
352*8d67ca89SAndroid Build Coastguard Worker             case 'M':
353*8d67ca89SAndroid Build Coastguard Worker               pt = _conv(t->tm_min, getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
354*8d67ca89SAndroid Build Coastguard Worker               continue;
355*8d67ca89SAndroid Build Coastguard Worker             case 'm':
356*8d67ca89SAndroid Build Coastguard Worker               pt = _conv(t->tm_mon + 1, getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
357*8d67ca89SAndroid Build Coastguard Worker               continue;
358*8d67ca89SAndroid Build Coastguard Worker             case 'n':
359*8d67ca89SAndroid Build Coastguard Worker                 pt = _add("\n", pt, ptlim, modifier);
360*8d67ca89SAndroid Build Coastguard Worker                 continue;
361*8d67ca89SAndroid Build Coastguard Worker             case 'P':
362*8d67ca89SAndroid Build Coastguard Worker             case 'p':
363*8d67ca89SAndroid Build Coastguard Worker                 pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
364*8d67ca89SAndroid Build Coastguard Worker                     Locale->pm :
365*8d67ca89SAndroid Build Coastguard Worker                     Locale->am,
366*8d67ca89SAndroid Build Coastguard Worker                     pt, ptlim, (*format == 'P') ? FORCE_LOWER_CASE : modifier);
367*8d67ca89SAndroid Build Coastguard Worker                 continue;
368*8d67ca89SAndroid Build Coastguard Worker             case 'R':
369*8d67ca89SAndroid Build Coastguard Worker                 pt = _fmt("%H:%M", t, pt, ptlim, warnp);
370*8d67ca89SAndroid Build Coastguard Worker                 continue;
371*8d67ca89SAndroid Build Coastguard Worker             case 'r':
372*8d67ca89SAndroid Build Coastguard Worker                 pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp);
373*8d67ca89SAndroid Build Coastguard Worker                 continue;
374*8d67ca89SAndroid Build Coastguard Worker             case 'S':
375*8d67ca89SAndroid Build Coastguard Worker               pt = _conv(t->tm_sec, getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
376*8d67ca89SAndroid Build Coastguard Worker               continue;
377*8d67ca89SAndroid Build Coastguard Worker             case 's':
378*8d67ca89SAndroid Build Coastguard Worker                 {
379*8d67ca89SAndroid Build Coastguard Worker                     struct tm   tm;
380*8d67ca89SAndroid Build Coastguard Worker                     char buf[INT_STRLEN_MAXIMUM(time64_t) + 1] __attribute__((__uninitialized__));
381*8d67ca89SAndroid Build Coastguard Worker                     time64_t    mkt;
382*8d67ca89SAndroid Build Coastguard Worker 
383*8d67ca89SAndroid Build Coastguard Worker           					tm.tm_sec = t->tm_sec;
384*8d67ca89SAndroid Build Coastguard Worker 					          tm.tm_min = t->tm_min;
385*8d67ca89SAndroid Build Coastguard Worker           					tm.tm_hour = t->tm_hour;
386*8d67ca89SAndroid Build Coastguard Worker 					          tm.tm_mday = t->tm_mday;
387*8d67ca89SAndroid Build Coastguard Worker           					tm.tm_mon = t->tm_mon;
388*8d67ca89SAndroid Build Coastguard Worker 					          tm.tm_year = t->tm_year;
389*8d67ca89SAndroid Build Coastguard Worker           					tm.tm_isdst = t->tm_isdst;
390*8d67ca89SAndroid Build Coastguard Worker #if defined TM_GMTOFF && ! UNINIT_TRAP
391*8d67ca89SAndroid Build Coastguard Worker 					          tm.TM_GMTOFF = t->TM_GMTOFF;
392*8d67ca89SAndroid Build Coastguard Worker #endif
393*8d67ca89SAndroid Build Coastguard Worker                     mkt = mktime64(&tm);
394*8d67ca89SAndroid Build Coastguard Worker 					/* If mktime fails, %s expands to the
395*8d67ca89SAndroid Build Coastguard Worker               value of (time_t) -1 as a failure
396*8d67ca89SAndroid Build Coastguard Worker               marker; this is better in practice
397*8d67ca89SAndroid Build Coastguard Worker               than strftime failing.  */
398*8d67ca89SAndroid Build Coastguard Worker                     if (TYPE_SIGNED(time64_t)) {
399*8d67ca89SAndroid Build Coastguard Worker                       intmax_t n = mkt;
400*8d67ca89SAndroid Build Coastguard Worker                       sprintf(buf, "%"PRIdMAX, n);
401*8d67ca89SAndroid Build Coastguard Worker                     } else {
402*8d67ca89SAndroid Build Coastguard Worker                       uintmax_t n = mkt;
403*8d67ca89SAndroid Build Coastguard Worker                       sprintf(buf, "%"PRIuMAX, n);
404*8d67ca89SAndroid Build Coastguard Worker                     }
405*8d67ca89SAndroid Build Coastguard Worker                     pt = _add(buf, pt, ptlim, modifier);
406*8d67ca89SAndroid Build Coastguard Worker                 }
407*8d67ca89SAndroid Build Coastguard Worker                 continue;
408*8d67ca89SAndroid Build Coastguard Worker             case 'T':
409*8d67ca89SAndroid Build Coastguard Worker                 pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp);
410*8d67ca89SAndroid Build Coastguard Worker                 continue;
411*8d67ca89SAndroid Build Coastguard Worker             case 't':
412*8d67ca89SAndroid Build Coastguard Worker                 pt = _add("\t", pt, ptlim, modifier);
413*8d67ca89SAndroid Build Coastguard Worker                 continue;
414*8d67ca89SAndroid Build Coastguard Worker             case 'U':
415*8d67ca89SAndroid Build Coastguard Worker               pt = _conv((t->tm_yday + DAYSPERWEEK - t->tm_wday) / DAYSPERWEEK,
416*8d67ca89SAndroid Build Coastguard Worker                          getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
417*8d67ca89SAndroid Build Coastguard Worker               continue;
418*8d67ca89SAndroid Build Coastguard Worker             case 'u':
419*8d67ca89SAndroid Build Coastguard Worker                 /*
420*8d67ca89SAndroid Build Coastguard Worker                 ** From Arnold Robbins' strftime version 3.0:
421*8d67ca89SAndroid Build Coastguard Worker                 ** "ISO 8601: Weekday as a decimal number
422*8d67ca89SAndroid Build Coastguard Worker                 ** [1 (Monday) - 7]"
423*8d67ca89SAndroid Build Coastguard Worker                 ** (ado, 1993-05-24)
424*8d67ca89SAndroid Build Coastguard Worker                 */
425*8d67ca89SAndroid Build Coastguard Worker                 pt = _conv((t->tm_wday == 0) ? DAYSPERWEEK : t->tm_wday, "  ", pt, ptlim);
426*8d67ca89SAndroid Build Coastguard Worker                 continue;
427*8d67ca89SAndroid Build Coastguard Worker             case 'V':   /* ISO 8601 week number */
428*8d67ca89SAndroid Build Coastguard Worker             case 'G':   /* ISO 8601 year (four digits) */
429*8d67ca89SAndroid Build Coastguard Worker             case 'g':   /* ISO 8601 year (two digits) */
430*8d67ca89SAndroid Build Coastguard Worker /*
431*8d67ca89SAndroid Build Coastguard Worker ** From Arnold Robbins' strftime version 3.0: "the week number of the
432*8d67ca89SAndroid Build Coastguard Worker ** year (the first Monday as the first day of week 1) as a decimal number
433*8d67ca89SAndroid Build Coastguard Worker ** (01-53)."
434*8d67ca89SAndroid Build Coastguard Worker ** (ado, 1993-05-24)
435*8d67ca89SAndroid Build Coastguard Worker **
436*8d67ca89SAndroid Build Coastguard Worker ** From <https://www.cl.cam.ac.uk/~mgk25/iso-time.html> by Markus Kuhn:
437*8d67ca89SAndroid Build Coastguard Worker ** "Week 01 of a year is per definition the first week which has the
438*8d67ca89SAndroid Build Coastguard Worker ** Thursday in this year, which is equivalent to the week which contains
439*8d67ca89SAndroid Build Coastguard Worker ** the fourth day of January. In other words, the first week of a new year
440*8d67ca89SAndroid Build Coastguard Worker ** is the week which has the majority of its days in the new year. Week 01
441*8d67ca89SAndroid Build Coastguard Worker ** might also contain days from the previous year and the week before week
442*8d67ca89SAndroid Build Coastguard Worker ** 01 of a year is the last week (52 or 53) of the previous year even if
443*8d67ca89SAndroid Build Coastguard Worker ** it contains days from the new year. A week starts with Monday (day 1)
444*8d67ca89SAndroid Build Coastguard Worker ** and ends with Sunday (day 7). For example, the first week of the year
445*8d67ca89SAndroid Build Coastguard Worker ** 1997 lasts from 1996-12-30 to 1997-01-05..."
446*8d67ca89SAndroid Build Coastguard Worker ** (ado, 1996-01-02)
447*8d67ca89SAndroid Build Coastguard Worker */
448*8d67ca89SAndroid Build Coastguard Worker                 {
449*8d67ca89SAndroid Build Coastguard Worker                     int year;
450*8d67ca89SAndroid Build Coastguard Worker                     int base;
451*8d67ca89SAndroid Build Coastguard Worker                     int yday;
452*8d67ca89SAndroid Build Coastguard Worker                     int wday;
453*8d67ca89SAndroid Build Coastguard Worker                     int w;
454*8d67ca89SAndroid Build Coastguard Worker 
455*8d67ca89SAndroid Build Coastguard Worker                     year = t->tm_year;
456*8d67ca89SAndroid Build Coastguard Worker                     base = TM_YEAR_BASE;
457*8d67ca89SAndroid Build Coastguard Worker                     yday = t->tm_yday;
458*8d67ca89SAndroid Build Coastguard Worker                     wday = t->tm_wday;
459*8d67ca89SAndroid Build Coastguard Worker                     for ( ; ; ) {
460*8d67ca89SAndroid Build Coastguard Worker                         int len;
461*8d67ca89SAndroid Build Coastguard Worker                         int bot;
462*8d67ca89SAndroid Build Coastguard Worker                         int top;
463*8d67ca89SAndroid Build Coastguard Worker 
464*8d67ca89SAndroid Build Coastguard Worker                         len = isleap_sum(year, base) ?
465*8d67ca89SAndroid Build Coastguard Worker                             DAYSPERLYEAR :
466*8d67ca89SAndroid Build Coastguard Worker                             DAYSPERNYEAR;
467*8d67ca89SAndroid Build Coastguard Worker                         /*
468*8d67ca89SAndroid Build Coastguard Worker                         ** What yday (-3 ... 3) does
469*8d67ca89SAndroid Build Coastguard Worker                         ** the ISO year begin on?
470*8d67ca89SAndroid Build Coastguard Worker                         */
471*8d67ca89SAndroid Build Coastguard Worker                         bot = ((yday + 11 - wday) %
472*8d67ca89SAndroid Build Coastguard Worker                             DAYSPERWEEK) - 3;
473*8d67ca89SAndroid Build Coastguard Worker                         /*
474*8d67ca89SAndroid Build Coastguard Worker                         ** What yday does the NEXT
475*8d67ca89SAndroid Build Coastguard Worker                         ** ISO year begin on?
476*8d67ca89SAndroid Build Coastguard Worker                         */
477*8d67ca89SAndroid Build Coastguard Worker                         top = bot -
478*8d67ca89SAndroid Build Coastguard Worker                             (len % DAYSPERWEEK);
479*8d67ca89SAndroid Build Coastguard Worker                         if (top < -3)
480*8d67ca89SAndroid Build Coastguard Worker                             top += DAYSPERWEEK;
481*8d67ca89SAndroid Build Coastguard Worker                         top += len;
482*8d67ca89SAndroid Build Coastguard Worker                         if (yday >= top) {
483*8d67ca89SAndroid Build Coastguard Worker                             ++base;
484*8d67ca89SAndroid Build Coastguard Worker                             w = 1;
485*8d67ca89SAndroid Build Coastguard Worker                             break;
486*8d67ca89SAndroid Build Coastguard Worker                         }
487*8d67ca89SAndroid Build Coastguard Worker                         if (yday >= bot) {
488*8d67ca89SAndroid Build Coastguard Worker                             w = 1 + ((yday - bot) /
489*8d67ca89SAndroid Build Coastguard Worker                                 DAYSPERWEEK);
490*8d67ca89SAndroid Build Coastguard Worker                             break;
491*8d67ca89SAndroid Build Coastguard Worker                         }
492*8d67ca89SAndroid Build Coastguard Worker                         --base;
493*8d67ca89SAndroid Build Coastguard Worker                         yday += isleap_sum(year, base) ?
494*8d67ca89SAndroid Build Coastguard Worker                             DAYSPERLYEAR :
495*8d67ca89SAndroid Build Coastguard Worker                             DAYSPERNYEAR;
496*8d67ca89SAndroid Build Coastguard Worker                     }
497*8d67ca89SAndroid Build Coastguard Worker #ifdef XPG4_1994_04_09
498*8d67ca89SAndroid Build Coastguard Worker                     if ((w == 52 &&
499*8d67ca89SAndroid Build Coastguard Worker                         t->tm_mon == TM_JANUARY) ||
500*8d67ca89SAndroid Build Coastguard Worker                         (w == 1 &&
501*8d67ca89SAndroid Build Coastguard Worker                         t->tm_mon == TM_DECEMBER))
502*8d67ca89SAndroid Build Coastguard Worker                             w = 53;
503*8d67ca89SAndroid Build Coastguard Worker #endif /* defined XPG4_1994_04_09 */
504*8d67ca89SAndroid Build Coastguard Worker                     if (*format == 'V')
505*8d67ca89SAndroid Build Coastguard Worker                       pt = _conv(w, getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
506*8d67ca89SAndroid Build Coastguard Worker                     else if (*format == 'g') {
507*8d67ca89SAndroid Build Coastguard Worker                         *warnp = IN_ALL;
508*8d67ca89SAndroid Build Coastguard Worker                         pt = _yconv(year, base,
509*8d67ca89SAndroid Build Coastguard Worker                             false, true,
510*8d67ca89SAndroid Build Coastguard Worker                             pt, ptlim, modifier);
511*8d67ca89SAndroid Build Coastguard Worker                     } else  pt = _yconv(year, base,
512*8d67ca89SAndroid Build Coastguard Worker                             true, true,
513*8d67ca89SAndroid Build Coastguard Worker                             pt, ptlim, modifier);
514*8d67ca89SAndroid Build Coastguard Worker                 }
515*8d67ca89SAndroid Build Coastguard Worker                 continue;
516*8d67ca89SAndroid Build Coastguard Worker             case 'v':
517*8d67ca89SAndroid Build Coastguard Worker                 /*
518*8d67ca89SAndroid Build Coastguard Worker                 ** From Arnold Robbins' strftime version 3.0:
519*8d67ca89SAndroid Build Coastguard Worker                 ** "date as dd-bbb-YYYY"
520*8d67ca89SAndroid Build Coastguard Worker                 ** (ado, 1993-05-24)
521*8d67ca89SAndroid Build Coastguard Worker                 */
522*8d67ca89SAndroid Build Coastguard Worker                 pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp);
523*8d67ca89SAndroid Build Coastguard Worker                 continue;
524*8d67ca89SAndroid Build Coastguard Worker             case 'W':
525*8d67ca89SAndroid Build Coastguard Worker               pt = _conv(
526*8d67ca89SAndroid Build Coastguard Worker                   (t->tm_yday + DAYSPERWEEK - (t->tm_wday ? (t->tm_wday - 1) : (DAYSPERWEEK - 1))) /
527*8d67ca89SAndroid Build Coastguard Worker                       DAYSPERWEEK,
528*8d67ca89SAndroid Build Coastguard Worker                   getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
529*8d67ca89SAndroid Build Coastguard Worker               continue;
530*8d67ca89SAndroid Build Coastguard Worker             case 'w':
531*8d67ca89SAndroid Build Coastguard Worker               pt = _conv(t->tm_wday, "  ", pt, ptlim);
532*8d67ca89SAndroid Build Coastguard Worker               continue;
533*8d67ca89SAndroid Build Coastguard Worker             case 'X':
534*8d67ca89SAndroid Build Coastguard Worker                 pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp);
535*8d67ca89SAndroid Build Coastguard Worker                 continue;
536*8d67ca89SAndroid Build Coastguard Worker             case 'x':
537*8d67ca89SAndroid Build Coastguard Worker                 {
538*8d67ca89SAndroid Build Coastguard Worker                 enum warn warn2 = IN_SOME;
539*8d67ca89SAndroid Build Coastguard Worker 
540*8d67ca89SAndroid Build Coastguard Worker                 pt = _fmt(Locale->x_fmt, t, pt, ptlim, &warn2);
541*8d67ca89SAndroid Build Coastguard Worker                 if (warn2 == IN_ALL)
542*8d67ca89SAndroid Build Coastguard Worker                     warn2 = IN_THIS;
543*8d67ca89SAndroid Build Coastguard Worker                 if (warn2 > *warnp)
544*8d67ca89SAndroid Build Coastguard Worker                     *warnp = warn2;
545*8d67ca89SAndroid Build Coastguard Worker                 }
546*8d67ca89SAndroid Build Coastguard Worker                 continue;
547*8d67ca89SAndroid Build Coastguard Worker             case 'y':
548*8d67ca89SAndroid Build Coastguard Worker                 *warnp = IN_ALL;
549*8d67ca89SAndroid Build Coastguard Worker                 pt = _yconv(t->tm_year, TM_YEAR_BASE,
550*8d67ca89SAndroid Build Coastguard Worker                     false, true,
551*8d67ca89SAndroid Build Coastguard Worker                     pt, ptlim, modifier);
552*8d67ca89SAndroid Build Coastguard Worker                 continue;
553*8d67ca89SAndroid Build Coastguard Worker             case 'Y':
554*8d67ca89SAndroid Build Coastguard Worker                 pt = _yconv(t->tm_year, TM_YEAR_BASE,
555*8d67ca89SAndroid Build Coastguard Worker                     true, true,
556*8d67ca89SAndroid Build Coastguard Worker                     pt, ptlim, modifier);
557*8d67ca89SAndroid Build Coastguard Worker                 continue;
558*8d67ca89SAndroid Build Coastguard Worker             case 'Z':
559*8d67ca89SAndroid Build Coastguard Worker #ifdef TM_ZONE
560*8d67ca89SAndroid Build Coastguard Worker                 // BEGIN: Android-changed.
561*8d67ca89SAndroid Build Coastguard Worker                 pt = _add(_safe_tm_zone(t), pt, ptlim, modifier);
562*8d67ca89SAndroid Build Coastguard Worker                 // END: Android-changed.
563*8d67ca89SAndroid Build Coastguard Worker #elif HAVE_TZNAME
564*8d67ca89SAndroid Build Coastguard Worker                 if (t->tm_isdst >= 0)
565*8d67ca89SAndroid Build Coastguard Worker                     pt = _add(tzname[t->tm_isdst != 0],
566*8d67ca89SAndroid Build Coastguard Worker                         pt, ptlim);
567*8d67ca89SAndroid Build Coastguard Worker #endif
568*8d67ca89SAndroid Build Coastguard Worker                 /*
569*8d67ca89SAndroid Build Coastguard Worker                 ** C99 and later say that %Z must be
570*8d67ca89SAndroid Build Coastguard Worker                 ** replaced by the empty string if the
571*8d67ca89SAndroid Build Coastguard Worker                 ** time zone abbreviation is not
572*8d67ca89SAndroid Build Coastguard Worker                 ** determinable.
573*8d67ca89SAndroid Build Coastguard Worker                 */
574*8d67ca89SAndroid Build Coastguard Worker                 continue;
575*8d67ca89SAndroid Build Coastguard Worker             case 'z':
576*8d67ca89SAndroid Build Coastguard Worker #if defined TM_GMTOFF || USG_COMPAT || ALTZONE
577*8d67ca89SAndroid Build Coastguard Worker                 {
578*8d67ca89SAndroid Build Coastguard Worker                 long     diff;
579*8d67ca89SAndroid Build Coastguard Worker                 char const *    sign;
580*8d67ca89SAndroid Build Coastguard Worker                 bool negative;
581*8d67ca89SAndroid Build Coastguard Worker 
582*8d67ca89SAndroid Build Coastguard Worker # ifdef TM_GMTOFF
583*8d67ca89SAndroid Build Coastguard Worker                 diff = t->TM_GMTOFF;
584*8d67ca89SAndroid Build Coastguard Worker # else
585*8d67ca89SAndroid Build Coastguard Worker                 /*
586*8d67ca89SAndroid Build Coastguard Worker                 ** C99 and later say that the UT offset must
587*8d67ca89SAndroid Build Coastguard Worker                 ** be computed by looking only at
588*8d67ca89SAndroid Build Coastguard Worker                 ** tm_isdst. This requirement is
589*8d67ca89SAndroid Build Coastguard Worker                 ** incorrect, since it means the code
590*8d67ca89SAndroid Build Coastguard Worker                 ** must rely on magic (in this case
591*8d67ca89SAndroid Build Coastguard Worker                 ** altzone and timezone), and the
592*8d67ca89SAndroid Build Coastguard Worker                 ** magic might not have the correct
593*8d67ca89SAndroid Build Coastguard Worker                 ** offset. Doing things correctly is
594*8d67ca89SAndroid Build Coastguard Worker                 ** tricky and requires disobeying the standard;
595*8d67ca89SAndroid Build Coastguard Worker                 ** see GNU C strftime for details.
596*8d67ca89SAndroid Build Coastguard Worker                 ** For now, punt and conform to the
597*8d67ca89SAndroid Build Coastguard Worker                 ** standard, even though it's incorrect.
598*8d67ca89SAndroid Build Coastguard Worker                 **
599*8d67ca89SAndroid Build Coastguard Worker                 ** C99 and later say that %z must be replaced by
600*8d67ca89SAndroid Build Coastguard Worker                 ** the empty string if the time zone is not
601*8d67ca89SAndroid Build Coastguard Worker                 ** determinable, so output nothing if the
602*8d67ca89SAndroid Build Coastguard Worker                 ** appropriate variables are not available.
603*8d67ca89SAndroid Build Coastguard Worker                 */
604*8d67ca89SAndroid Build Coastguard Worker                 if (t->tm_isdst < 0)
605*8d67ca89SAndroid Build Coastguard Worker                     continue;
606*8d67ca89SAndroid Build Coastguard Worker                 if (t->tm_isdst == 0)
607*8d67ca89SAndroid Build Coastguard Worker #  if USG_COMPAT
608*8d67ca89SAndroid Build Coastguard Worker                     diff = -timezone;
609*8d67ca89SAndroid Build Coastguard Worker #  else
610*8d67ca89SAndroid Build Coastguard Worker                     continue;
611*8d67ca89SAndroid Build Coastguard Worker #  endif
612*8d67ca89SAndroid Build Coastguard Worker                 else
613*8d67ca89SAndroid Build Coastguard Worker #  if ALTZONE
614*8d67ca89SAndroid Build Coastguard Worker                     diff = -altzone;
615*8d67ca89SAndroid Build Coastguard Worker #  else
616*8d67ca89SAndroid Build Coastguard Worker                     continue;
617*8d67ca89SAndroid Build Coastguard Worker #  endif
618*8d67ca89SAndroid Build Coastguard Worker # endif
619*8d67ca89SAndroid Build Coastguard Worker                 negative = diff < 0;
620*8d67ca89SAndroid Build Coastguard Worker                 if (diff == 0) {
621*8d67ca89SAndroid Build Coastguard Worker # ifdef TM_ZONE
622*8d67ca89SAndroid Build Coastguard Worker                   // Android-changed: do not use TM_ZONE as it is as it may be null.
623*8d67ca89SAndroid Build Coastguard Worker                   {
624*8d67ca89SAndroid Build Coastguard Worker                     const char* zone = _safe_tm_zone(t);
625*8d67ca89SAndroid Build Coastguard Worker                     negative = zone[0] == '-';
626*8d67ca89SAndroid Build Coastguard Worker                   }
627*8d67ca89SAndroid Build Coastguard Worker # else
628*8d67ca89SAndroid Build Coastguard Worker                     negative = t->tm_isdst < 0;
629*8d67ca89SAndroid Build Coastguard Worker #  if HAVE_TZNAME
630*8d67ca89SAndroid Build Coastguard Worker                     if (tzname[t->tm_isdst != 0][0] == '-')
631*8d67ca89SAndroid Build Coastguard Worker                         negative = true;
632*8d67ca89SAndroid Build Coastguard Worker #  endif
633*8d67ca89SAndroid Build Coastguard Worker # endif
634*8d67ca89SAndroid Build Coastguard Worker                 }
635*8d67ca89SAndroid Build Coastguard Worker                 if (negative) {
636*8d67ca89SAndroid Build Coastguard Worker                     sign = "-";
637*8d67ca89SAndroid Build Coastguard Worker                     diff = -diff;
638*8d67ca89SAndroid Build Coastguard Worker                 } else  sign = "+";
639*8d67ca89SAndroid Build Coastguard Worker                 pt = _add(sign, pt, ptlim, modifier);
640*8d67ca89SAndroid Build Coastguard Worker                 diff /= SECSPERMIN;
641*8d67ca89SAndroid Build Coastguard Worker                 diff = (diff / MINSPERHOUR) * 100 +
642*8d67ca89SAndroid Build Coastguard Worker                     (diff % MINSPERHOUR);
643*8d67ca89SAndroid Build Coastguard Worker                 pt = _conv(diff, getformat(modifier, "04", " 4", "  ", "04"), pt, ptlim);
644*8d67ca89SAndroid Build Coastguard Worker                 }
645*8d67ca89SAndroid Build Coastguard Worker #endif
646*8d67ca89SAndroid Build Coastguard Worker                 continue;
647*8d67ca89SAndroid Build Coastguard Worker             case '+':
648*8d67ca89SAndroid Build Coastguard Worker                 pt = _fmt(Locale->date_fmt, t, pt, ptlim,
649*8d67ca89SAndroid Build Coastguard Worker                     warnp);
650*8d67ca89SAndroid Build Coastguard Worker                 continue;
651*8d67ca89SAndroid Build Coastguard Worker             case '%':
652*8d67ca89SAndroid Build Coastguard Worker             /*
653*8d67ca89SAndroid Build Coastguard Worker             ** X311J/88-090 (4.12.3.5): if conversion char is
654*8d67ca89SAndroid Build Coastguard Worker             ** undefined, behavior is undefined. Print out the
655*8d67ca89SAndroid Build Coastguard Worker             ** character itself as printf(3) also does.
656*8d67ca89SAndroid Build Coastguard Worker             */
657*8d67ca89SAndroid Build Coastguard Worker             default:
658*8d67ca89SAndroid Build Coastguard Worker                 break;
659*8d67ca89SAndroid Build Coastguard Worker             }
660*8d67ca89SAndroid Build Coastguard Worker         }
661*8d67ca89SAndroid Build Coastguard Worker         if (pt == ptlim)
662*8d67ca89SAndroid Build Coastguard Worker             break;
663*8d67ca89SAndroid Build Coastguard Worker         *pt++ = *format;
664*8d67ca89SAndroid Build Coastguard Worker     }
665*8d67ca89SAndroid Build Coastguard Worker     return pt;
666*8d67ca89SAndroid Build Coastguard Worker }
667*8d67ca89SAndroid Build Coastguard Worker 
668*8d67ca89SAndroid Build Coastguard Worker static char *
_conv(int n,const char * format,char * pt,const char * ptlim)669*8d67ca89SAndroid Build Coastguard Worker _conv(int n, const char *format, char *pt, const char *ptlim)
670*8d67ca89SAndroid Build Coastguard Worker {
671*8d67ca89SAndroid Build Coastguard Worker   // The original implementation used snprintf(3) here, but rolling our own is
672*8d67ca89SAndroid Build Coastguard Worker   // about 5x faster. Seems like a good trade-off for so little code, especially
673*8d67ca89SAndroid Build Coastguard Worker   // for users like logcat that have a habit of formatting 10k times all at
674*8d67ca89SAndroid Build Coastguard Worker   // once...
675*8d67ca89SAndroid Build Coastguard Worker 
676*8d67ca89SAndroid Build Coastguard Worker   // Format is '0' or ' ' for the fill character, followed by a single-digit
677*8d67ca89SAndroid Build Coastguard Worker   // width or ' ' for "whatever".
678*8d67ca89SAndroid Build Coastguard Worker   //   %d -> "  "
679*8d67ca89SAndroid Build Coastguard Worker   //  %2d -> " 2"
680*8d67ca89SAndroid Build Coastguard Worker   // %02d -> "02"
681*8d67ca89SAndroid Build Coastguard Worker   char fill = format[0];
682*8d67ca89SAndroid Build Coastguard Worker   int width = format[1] == ' ' ? 0 : format[1] - '0';
683*8d67ca89SAndroid Build Coastguard Worker 
684*8d67ca89SAndroid Build Coastguard Worker   char buf[32] __attribute__((__uninitialized__));
685*8d67ca89SAndroid Build Coastguard Worker 
686*8d67ca89SAndroid Build Coastguard Worker   // Terminate first, so we can walk backwards from the least-significant digit
687*8d67ca89SAndroid Build Coastguard Worker   // without having to later reverse the result.
688*8d67ca89SAndroid Build Coastguard Worker   char* p = &buf[31];
689*8d67ca89SAndroid Build Coastguard Worker   *--p = '\0';
690*8d67ca89SAndroid Build Coastguard Worker   char* end = p;
691*8d67ca89SAndroid Build Coastguard Worker 
692*8d67ca89SAndroid Build Coastguard Worker   // Output digits backwards, from least-significant to most.
693*8d67ca89SAndroid Build Coastguard Worker   while (n >= 10) {
694*8d67ca89SAndroid Build Coastguard Worker     *--p = '0' + (n % 10);
695*8d67ca89SAndroid Build Coastguard Worker     n /= 10;
696*8d67ca89SAndroid Build Coastguard Worker   }
697*8d67ca89SAndroid Build Coastguard Worker   *--p = '0' + n;
698*8d67ca89SAndroid Build Coastguard Worker 
699*8d67ca89SAndroid Build Coastguard Worker   // Fill if more digits are required by the format.
700*8d67ca89SAndroid Build Coastguard Worker   while ((end - p) < width) {
701*8d67ca89SAndroid Build Coastguard Worker     *--p = fill;
702*8d67ca89SAndroid Build Coastguard Worker   }
703*8d67ca89SAndroid Build Coastguard Worker 
704*8d67ca89SAndroid Build Coastguard Worker   return _add(p, pt, ptlim, 0);
705*8d67ca89SAndroid Build Coastguard Worker }
706*8d67ca89SAndroid Build Coastguard Worker 
707*8d67ca89SAndroid Build Coastguard Worker static char *
_add(const char * str,char * pt,const char * const ptlim,int modifier)708*8d67ca89SAndroid Build Coastguard Worker _add(const char *str, char *pt, const char *const ptlim, int modifier)
709*8d67ca89SAndroid Build Coastguard Worker {
710*8d67ca89SAndroid Build Coastguard Worker         int c;
711*8d67ca89SAndroid Build Coastguard Worker 
712*8d67ca89SAndroid Build Coastguard Worker         switch (modifier) {
713*8d67ca89SAndroid Build Coastguard Worker         case FORCE_LOWER_CASE:
714*8d67ca89SAndroid Build Coastguard Worker                 while (pt < ptlim && (*pt = tolower(*str++)) != '\0') {
715*8d67ca89SAndroid Build Coastguard Worker                         ++pt;
716*8d67ca89SAndroid Build Coastguard Worker                 }
717*8d67ca89SAndroid Build Coastguard Worker                 break;
718*8d67ca89SAndroid Build Coastguard Worker 
719*8d67ca89SAndroid Build Coastguard Worker         case '^':
720*8d67ca89SAndroid Build Coastguard Worker                 while (pt < ptlim && (*pt = toupper(*str++)) != '\0') {
721*8d67ca89SAndroid Build Coastguard Worker                         ++pt;
722*8d67ca89SAndroid Build Coastguard Worker                 }
723*8d67ca89SAndroid Build Coastguard Worker                 break;
724*8d67ca89SAndroid Build Coastguard Worker 
725*8d67ca89SAndroid Build Coastguard Worker         case '#':
726*8d67ca89SAndroid Build Coastguard Worker                 while (pt < ptlim && (c = *str++) != '\0') {
727*8d67ca89SAndroid Build Coastguard Worker                         if (isupper(c)) {
728*8d67ca89SAndroid Build Coastguard Worker                                 c = tolower(c);
729*8d67ca89SAndroid Build Coastguard Worker                         } else if (islower(c)) {
730*8d67ca89SAndroid Build Coastguard Worker                                 c = toupper(c);
731*8d67ca89SAndroid Build Coastguard Worker                         }
732*8d67ca89SAndroid Build Coastguard Worker                         *pt = c;
733*8d67ca89SAndroid Build Coastguard Worker                         ++pt;
734*8d67ca89SAndroid Build Coastguard Worker                 }
735*8d67ca89SAndroid Build Coastguard Worker 
736*8d67ca89SAndroid Build Coastguard Worker                 break;
737*8d67ca89SAndroid Build Coastguard Worker 
738*8d67ca89SAndroid Build Coastguard Worker         default:
739*8d67ca89SAndroid Build Coastguard Worker                 while (pt < ptlim && (*pt = *str++) != '\0') {
740*8d67ca89SAndroid Build Coastguard Worker                         ++pt;
741*8d67ca89SAndroid Build Coastguard Worker                 }
742*8d67ca89SAndroid Build Coastguard Worker         }
743*8d67ca89SAndroid Build Coastguard Worker 
744*8d67ca89SAndroid Build Coastguard Worker     return pt;
745*8d67ca89SAndroid Build Coastguard Worker }
746*8d67ca89SAndroid Build Coastguard Worker 
747*8d67ca89SAndroid Build Coastguard Worker /*
748*8d67ca89SAndroid Build Coastguard Worker ** POSIX and the C Standard are unclear or inconsistent about
749*8d67ca89SAndroid Build Coastguard Worker ** what %C and %y do if the year is negative or exceeds 9999.
750*8d67ca89SAndroid Build Coastguard Worker ** Use the convention that %C concatenated with %y yields the
751*8d67ca89SAndroid Build Coastguard Worker ** same output as %Y, and that %Y contains at least 4 bytes,
752*8d67ca89SAndroid Build Coastguard Worker ** with more only if necessary.
753*8d67ca89SAndroid Build Coastguard Worker */
754*8d67ca89SAndroid Build Coastguard Worker 
755*8d67ca89SAndroid Build Coastguard Worker static char *
_yconv(int a,int b,bool convert_top,bool convert_yy,char * pt,const char * ptlim,int modifier)756*8d67ca89SAndroid Build Coastguard Worker _yconv(int a, int b, bool convert_top, bool convert_yy,
757*8d67ca89SAndroid Build Coastguard Worker        char *pt, const char *ptlim, int modifier)
758*8d67ca89SAndroid Build Coastguard Worker {
759*8d67ca89SAndroid Build Coastguard Worker     register int    lead;
760*8d67ca89SAndroid Build Coastguard Worker     register int    trail;
761*8d67ca89SAndroid Build Coastguard Worker 
762*8d67ca89SAndroid Build Coastguard Worker     int DIVISOR = 100;
763*8d67ca89SAndroid Build Coastguard Worker     trail = a % DIVISOR + b % DIVISOR;
764*8d67ca89SAndroid Build Coastguard Worker     lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR;
765*8d67ca89SAndroid Build Coastguard Worker     trail %= DIVISOR;
766*8d67ca89SAndroid Build Coastguard Worker     if (trail < 0 && lead > 0) {
767*8d67ca89SAndroid Build Coastguard Worker         trail += DIVISOR;
768*8d67ca89SAndroid Build Coastguard Worker         --lead;
769*8d67ca89SAndroid Build Coastguard Worker     } else if (lead < 0 && trail > 0) {
770*8d67ca89SAndroid Build Coastguard Worker         trail -= DIVISOR;
771*8d67ca89SAndroid Build Coastguard Worker         ++lead;
772*8d67ca89SAndroid Build Coastguard Worker     }
773*8d67ca89SAndroid Build Coastguard Worker     if (convert_top) {
774*8d67ca89SAndroid Build Coastguard Worker         if (lead == 0 && trail < 0)
775*8d67ca89SAndroid Build Coastguard Worker             pt = _add("-0", pt, ptlim, modifier);
776*8d67ca89SAndroid Build Coastguard Worker         else
777*8d67ca89SAndroid Build Coastguard Worker           pt = _conv(lead, getformat(modifier, "02", " 2", "  ", "02"), pt, ptlim);
778*8d67ca89SAndroid Build Coastguard Worker     }
779*8d67ca89SAndroid Build Coastguard Worker     if (convert_yy)
780*8d67ca89SAndroid Build Coastguard Worker       pt = _conv(((trail < 0) ? -trail : trail), getformat(modifier, "02", " 2", "  ", "02"), pt,
781*8d67ca89SAndroid Build Coastguard Worker                  ptlim);
782*8d67ca89SAndroid Build Coastguard Worker     return pt;
783*8d67ca89SAndroid Build Coastguard Worker }
784