-/* strftime - custom formatting of date and/or time
- Copyright (C) 1989, 1991, 1992 Free Software Foundation, Inc.
+/* Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ NOTE: The canonical source of this file is maintained with the GNU C Library.
+ Bugs can be reported to bug-glibc@prep.ai.mit.edu.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* Note: this version of strftime lacks locale support,
- but it is standalone.
-
- Performs `%' substitutions similar to those in printf. Except
- where noted, substituted fields have a fixed size; numeric fields are
- padded if necessary. Padding is with zeros by default; for fields
- that display a single number, padding can be changed or inhibited by
- following the `%' with one of the modifiers described below. Unknown
- field specifiers are copied as normal characters. All other
- characters are copied to the output without change.
-
- Supports a superset of the ANSI C field specifiers.
-
- Literal character fields:
- % %
- n newline
- t tab
-
- Numeric modifiers (a nonstandard extension):
- - do not pad the field
- _ pad the field with spaces
-
- Time fields:
- %H hour (00..23)
- %I hour (01..12)
- %k hour ( 0..23)
- %l hour ( 1..12)
- %M minute (00..59)
- %p locale's AM or PM
- %r time, 12-hour (hh:mm:ss [AP]M)
- %R time, 24-hour (hh:mm)
- %S second (00..61)
- %T time, 24-hour (hh:mm:ss)
- %X locale's time representation (%H:%M:%S)
- %Z time zone (EDT), or nothing if no time zone is determinable
-
- Date fields:
- %a locale's abbreviated weekday name (Sun..Sat)
- %A locale's full weekday name, variable length (Sunday..Saturday)
- %b locale's abbreviated month name (Jan..Dec)
- %B locale's full month name, variable length (January..December)
- %c locale's date and time (Sat Nov 04 12:02:33 EST 1989)
- %C century (00..99)
- %d day of month (01..31)
- %e day of month ( 1..31)
- %D date (mm/dd/yy)
- %h same as %b
- %j day of year (001..366)
- %m month (01..12)
- %U week number of year with Sunday as first day of week (00..53)
- %w day of week (0..6)
- %W week number of year with Monday as first day of week (00..53)
- %x locale's date representation (mm/dd/yy)
- %y last two digits of year (00..99)
- %Y year (1970...)
-
- David MacKenzie <djm@gnu.ai.mit.edu> */
-
-#include <sys/types.h>
-#if defined(TM_IN_SYS_TIME) || (!defined(HAVE_TM_ZONE) && !defined(HAVE_TZNAME))
-#include <sys/time.h>
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ USA. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#ifdef _LIBC
+# define HAVE_LIMITS_H 1
+# define HAVE_MBLEN 1
+# define HAVE_MBRLEN 1
+# define HAVE_STRUCT_ERA_ENTRY 1
+# define HAVE_TM_GMTOFF 1
+# define HAVE_TM_ZONE 1
+# define HAVE_TZNAME 1
+# define HAVE_TZSET 1
+# define MULTIBYTE_IS_FORMAT_SAFE 1
+# define STDC_HEADERS 1
+# include "../locale/localeinfo.h"
+#endif
+
+#if defined emacs && !defined HAVE_BCOPY
+# define HAVE_MEMCPY 1
+#endif
+
+#include <ctype.h>
+#include <sys/types.h> /* Some systems define `time_t' here. */
+
+#ifdef TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
#else
-#include <time.h>
+# ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+#if HAVE_TZNAME
+extern char *tzname[];
#endif
-#if defined(HAVE_TZNAME)
-extern char *tzname[2];
+/* Do multibyte processing if multibytes are supported, unless
+ multibyte sequences are safe in formats. Multibyte sequences are
+ safe if they cannot contain byte sequences that look like format
+ conversion specifications. The GNU C Library uses UTF8 multibyte
+ encoding, which is safe for formats, but strftime.c can be used
+ with other C libraries that use unsafe encodings. */
+#define DO_MULTIBYTE (HAVE_MBLEN && ! MULTIBYTE_IS_FORMAT_SAFE)
+
+#if DO_MULTIBYTE
+# if HAVE_MBRLEN
+# include <wchar.h>
+# else
+ /* Simulate mbrlen with mblen as best we can. */
+# define mbstate_t int
+# define mbrlen(s, n, ps) mblen (s, n)
+# define mbsinit(ps) (*(ps) == 0)
+# endif
+ static const mbstate_t mbstate_zero;
#endif
-/* Types of padding for numbers in date and time. */
-enum padding
-{
- none, blank, zero
-};
+#if HAVE_LIMITS_H
+# include <limits.h>
+#endif
+
+#if STDC_HEADERS
+# include <stddef.h>
+# include <stdlib.h>
+# include <string.h>
+#else
+# ifndef HAVE_MEMCPY
+# define memcpy(d, s, n) bcopy ((s), (d), (n))
+# endif
+#endif
+
+#ifdef _LIBC
+# define MEMPCPY(d, s, n) __mempcpy (d, s, n)
+#else
+# ifndef HAVE_MEMPCPY
+# define MEMPCPY(d, s, n) ((void *) ((char *) memcpy (d, s, n) + (n)))
+# endif
+#endif
-static char const* const days[] =
+#ifndef __P
+# if defined __GNUC__ || (defined __STDC__ && __STDC__)
+# define __P(args) args
+# else
+# define __P(args) ()
+# endif /* GCC. */
+#endif /* Not __P. */
+
+#ifndef PTR
+# ifdef __STDC__
+# define PTR void *
+# else
+# define PTR char *
+# endif
+#endif
+
+#ifndef CHAR_BIT
+# define CHAR_BIT 8
+#endif
+
+#ifndef NULL
+# define NULL 0
+#endif
+
+#define TYPE_SIGNED(t) ((t) -1 < 0)
+
+/* Bound on length of the string representing an integer value of type t.
+ Subtract one for the sign bit if t is signed;
+ 302 / 1000 is log10 (2) rounded up;
+ add one for integer division truncation;
+ add one more for a minus sign if t is signed. */
+#define INT_STRLEN_BOUND(t) \
+ ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 + 1 + TYPE_SIGNED (t))
+
+#define TM_YEAR_BASE 1900
+
+#ifndef __isleap
+/* Nonzero if YEAR is a leap year (every 4 years,
+ except every 100th isn't, and every 400th is). */
+# define __isleap(year) \
+ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
+#endif
+
+
+#ifdef _LIBC
+# define my_strftime_gmtime_r __gmtime_r
+# define my_strftime_localtime_r __localtime_r
+# define tzname __tzname
+# define tzset __tzset
+#else
+
+/* If we're a strftime substitute in a GNU program, then prefer gmtime
+ to gmtime_r, since many gmtime_r implementations are buggy.
+ Similarly for localtime_r. */
+
+# if ! HAVE_TM_GMTOFF
+static struct tm *my_strftime_gmtime_r __P ((const time_t *, struct tm *));
+static struct tm *
+my_strftime_gmtime_r (const time_t *t, struct tm *tp)
{
- "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
-};
+ struct tm *l = gmtime (t);
+ if (! l)
+ return 0;
+ *tp = *l;
+ return tp;
+}
+# endif /* ! HAVE_TM_GMTOFF */
-static char const * const months[] =
+static struct tm *my_strftime_localtime_r __P ((const time_t *, struct tm *));
+static struct tm *
+my_strftime_localtime_r (const time_t *t, struct tm *tp)
{
- "January", "February", "March", "April", "May", "June",
- "July", "August", "September", "October", "November", "December"
-};
+ struct tm *l = localtime (t);
+ if (! l)
+ return 0;
+ *tp = *l;
+ return tp;
+}
+#endif /* ! defined _LIBC */
-/* Add character C to STRING and increment LENGTH,
- unless LENGTH would exceed MAX. */
-#define add_char(c) (length + 1 <= max) && (string[length++] = (c))
+#if !defined memset && !defined HAVE_MEMSET && !defined _LIBC
+/* Some systems lack the `memset' function and we don't want to
+ introduce additional dependencies. */
+/* The SGI compiler reportedly barfs on the trailing null
+ if we use a string constant as the initializer. 28 June 1997, rms. */
+static const char spaces[16] = /* " " */
+ { ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ' };
+static const char zeroes[16] = /* "0000000000000000" */
+ { '0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0' };
-/* Add a 2 digit number to STRING, padding if specified.
- Return the number of characters added, up to MAX. */
+# define memset_space(P, Len) \
+ do { \
+ int _len = (Len); \
+ \
+ do \
+ { \
+ int _this = _len > 16 ? 16 : _len; \
+ (P) = MEMPCPY ((P), spaces, _this); \
+ _len -= _this; \
+ } \
+ while (_len > 0); \
+ } while (0)
-static int
-add_num2 (string, num, max, pad)
- char *string;
- int num;
- int max;
- enum padding pad;
+# define memset_zero(P, Len) \
+ do { \
+ int _len = (Len); \
+ \
+ do \
+ { \
+ int _this = _len > 16 ? 16 : _len; \
+ (P) = MEMPCPY ((P), zeroes, _this); \
+ _len -= _this; \
+ } \
+ while (_len > 0); \
+ } while (0)
+#else
+# define memset_space(P, Len) (memset ((P), ' ', (Len)), (P) += (Len))
+# define memset_zero(P, Len) (memset ((P), '0', (Len)), (P) += (Len))
+#endif
+
+#define add(n, f) \
+ do \
+ { \
+ int _n = (n); \
+ int _delta = width - _n; \
+ int _incr = _n + (_delta > 0 ? _delta : 0); \
+ if (i + _incr >= maxsize) \
+ return 0; \
+ if (p) \
+ { \
+ if (_delta > 0) \
+ { \
+ if (pad == '0') \
+ memset_zero (p, _delta); \
+ else \
+ memset_space (p, _delta); \
+ } \
+ f; \
+ p += _n; \
+ } \
+ i += _incr; \
+ } while (0)
+
+#define cpy(n, s) \
+ add ((n), \
+ if (to_lowcase) \
+ memcpy_lowcase (p, (s), _n); \
+ else if (to_uppcase) \
+ memcpy_uppcase (p, (s), _n); \
+ else \
+ memcpy ((PTR) p, (PTR) (s), _n))
+
+
+
+#ifdef _LIBC
+# define TOUPPER(Ch) toupper (Ch)
+# define TOLOWER(Ch) tolower (Ch)
+#else
+# define TOUPPER(Ch) (islower (Ch) ? toupper (Ch) : (Ch))
+# define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch))
+#endif
+/* We don't use `isdigit' here since the locale dependent
+ interpretation is not what we want here. We only need to accept
+ the arabic digits in the ASCII range. One day there is perhaps a
+ more reliable way to accept other sets of digits. */
+#define ISDIGIT(Ch) ((unsigned int) (Ch) - '0' <= 9)
+
+static char *memcpy_lowcase __P ((char *dest, const char *src, size_t len));
+
+static char *
+memcpy_lowcase (char *dest, const char *src, size_t len)
{
- int top = num / 10;
- int length = 0;
-
- if (top == 0 && pad == blank)
- add_char (' ');
- else if (top != 0 || pad == zero)
- add_char (top + '0');
- add_char (num % 10 + '0');
- return length;
+ while (len-- > 0)
+ dest[len] = TOLOWER ((unsigned char) src[len]);
+ return dest;
}
-/* Add a 3 digit number to STRING, padding if specified.
- Return the number of characters added, up to MAX. */
+static char *memcpy_uppcase __P ((char *dest, const char *src, size_t len));
-static int
-add_num3 (string, num, max, pad)
- char *string;
- int num;
- int max;
- enum padding pad;
+static char *
+memcpy_uppcase (char *dest, const char *src, size_t len)
{
- int top = num / 100;
- int mid = (num - top * 100) / 10;
- int length = 0;
-
- if (top == 0 && pad == blank)
- add_char (' ');
- else if (top != 0 || pad == zero)
- add_char (top + '0');
- if (mid == 0 && top == 0 && pad == blank)
- add_char (' ');
- else if (mid != 0 || top != 0 || pad == zero)
- add_char (mid + '0');
- add_char (num % 10 + '0');
- return length;
+ while (len-- > 0)
+ dest[len] = TOUPPER ((unsigned char) src[len]);
+ return dest;
}
-/* Like strncpy except return the number of characters copied. */
+#if ! HAVE_TM_GMTOFF
+/* Yield the difference between *A and *B,
+ measured in seconds, ignoring leap seconds. */
+# define tm_diff ftime_tm_diff
+static int tm_diff __P ((const struct tm *, const struct tm *));
static int
-add_str (to, from, max)
- char *to;
- char *from;
- int max;
+tm_diff (const struct tm *a, const struct tm *b)
{
- int i;
-
- for (i = 0; from[i] && i <= max; ++i)
- to[i] = from[i];
- return i;
+ /* Compute intervening leap days correctly even if year is negative.
+ Take care to avoid int overflow in leap day calculations,
+ but it's OK to assume that A and B are close to each other. */
+ int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3);
+ int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3);
+ int a100 = a4 / 25 - (a4 % 25 < 0);
+ int b100 = b4 / 25 - (b4 % 25 < 0);
+ int a400 = a100 >> 2;
+ int b400 = b100 >> 2;
+ int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
+ int years = a->tm_year - b->tm_year;
+ int days = (365 * years + intervening_leap_days
+ + (a->tm_yday - b->tm_yday));
+ return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
+ + (a->tm_min - b->tm_min))
+ + (a->tm_sec - b->tm_sec));
}
+#endif /* ! HAVE_TM_GMTOFF */
-/* Return the week in the year of the time in TM, with the weeks
- starting on Sundays. */
+
+/* The number of days from the first day of the first ISO week of this
+ year to the year day YDAY with week day WDAY. ISO weeks start on
+ Monday; the first ISO week has the year's first Thursday. YDAY may
+ be as small as YDAY_MINIMUM. */
+#define ISO_WEEK_START_WDAY 1 /* Monday */
+#define ISO_WEEK1_WDAY 4 /* Thursday */
+#define YDAY_MINIMUM (-366)
+static int iso_week_days __P ((int, int));
+#ifdef __GNUC__
+__inline__
+#endif
static int
-sun_week (tm)
- struct tm *tm;
+iso_week_days (int yday, int wday)
{
- int dl;
-
- /* Set `dl' to the day in the year of the last day of the week previous
- to the one containing the day specified in TM. If the day specified
- in TM is in the first week of the year, `dl' will be negative or 0.
- Otherwise, calculate the number of complete weeks before our week
- (dl / 7) and add any partial week at the start of the year (dl % 7). */
- dl = tm->tm_yday - tm->tm_wday;
- return dl <= 0 ? 0 : dl / 7 + (dl % 7 != 0);
+ /* Add enough to the first operand of % to make it nonnegative. */
+ int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7;
+ return (yday
+ - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7
+ + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY);
}
-/* Return the week in the year of the time in TM, with the weeks
- starting on Mondays. */
-static int
-mon_week (tm)
- struct tm *tm;
-{
- int dl, wday;
+#if !(defined _NL_CURRENT || HAVE_STRFTIME)
+static char const weekday_name[][10] =
+ {
+ "Sunday", "Monday", "Tuesday", "Wednesday",
+ "Thursday", "Friday", "Saturday"
+ };
+static char const month_name[][10] =
+ {
+ "January", "February", "March", "April", "May", "June",
+ "July", "August", "September", "October", "November", "December"
+ };
+#endif
- if (tm->tm_wday == 0)
- wday = 6;
- else
- wday = tm->tm_wday - 1;
- dl = tm->tm_yday - wday;
- return dl <= 0 ? 0 : dl / 7 + (dl % 7 != 0);
-}
-#if !defined(HAVE_TM_ZONE) && !defined(HAVE_TZNAME)
-char *
-zone_name (tp)
- struct tm *tp;
-{
- char *timezone ();
- struct timeval tv;
- struct timezone tz;
+#ifdef emacs
+# define my_strftime emacs_strftimeu
+# define ut_argument , ut
+# define ut_argument_spec int ut;
+# define ut_argument_spec_iso , int ut
+#else
+# define my_strftime strftime
+# define ut_argument
+# define ut_argument_spec
+# define ut_argument_spec_iso
+/* We don't have this information in general. */
+# define ut 0
+#endif
- gettimeofday (&tv, &tz);
- return timezone (tz.tz_minuteswest, tp->tm_isdst);
-}
+#if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET
+ /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime.
+ Work around this bug by copying *tp before it might be munged. */
+ size_t _strftime_copytm __P ((char *, size_t, const char *,
+ const struct tm * ut_argument_spec_iso));
+ size_t
+ my_strftime (s, maxsize, format, tp ut_argument)
+ char *s;
+ size_t maxsize;
+ const char *format;
+ const struct tm *tp;
+ ut_argument_spec
+ {
+ struct tm tmcopy;
+ tmcopy = *tp;
+ return _strftime_copytm (s, maxsize, format, &tmcopy ut_argument);
+ }
+# undef my_strftime
+# define my_strftime(S, Maxsize, Format, Tp) \
+ _strftime_copytm (S, Maxsize, Format, Tp)
#endif
-/* Format the time given in TM according to FORMAT, and put the
- results in STRING.
- Return the number of characters (not including terminating null)
- that were put into STRING, or 0 if the length would have
- exceeded MAX. */
+/* Write information from TP into S according to the format
+ string FORMAT, writing no more that MAXSIZE characters
+ (including the terminating '\0') and returning number of
+ characters written. If S is NULL, nothing will be written
+ anywhere, so to determine how many characters would be
+ written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */
size_t
-strftime (string, max, format, tm)
- char *string;
- size_t max;
- const char *format;
- const struct tm *tm;
+my_strftime (char *s, size_t maxsize, const char *format, const struct tm *tp
+ ut_argument_spec)
{
- enum padding pad; /* Type of padding to apply. */
- size_t length = 0; /* Characters put in STRING so far. */
+ int hour12 = tp->tm_hour;
+#ifdef _NL_CURRENT
+ /* We cannot make the following values variables since we must delay
+ the evaluation of these values until really needed since some
+ expressions might not be valid in every situation. The `struct tm'
+ might be generated by a strptime() call that initialized
+ only a few elements. Dereference the pointers only if the format
+ requires this. Then it is ok to fail if the pointers are invalid. */
+# define a_wkday _NL_CURRENT (LC_TIME, ABDAY_1 + tp->tm_wday)
+# define f_wkday _NL_CURRENT (LC_TIME, DAY_1 + tp->tm_wday)
+# define a_month _NL_CURRENT (LC_TIME, ABMON_1 + tp->tm_mon)
+# define f_month _NL_CURRENT (LC_TIME, MON_1 + tp->tm_mon)
+# define ampm _NL_CURRENT (LC_TIME, tp->tm_hour > 11 ? PM_STR : AM_STR)
+
+# define aw_len strlen (a_wkday)
+# define am_len strlen (a_month)
+# define ap_len strlen (ampm)
+#else
+# if !HAVE_STRFTIME
+# define f_wkday (weekday_name[tp->tm_wday])
+# define f_month (month_name[tp->tm_mon])
+# define a_wkday f_wkday
+# define a_month f_month
+# define ampm ("AMPM" + 2 * (tp->tm_hour > 11))
+
+ size_t aw_len = 3;
+ size_t am_len = 3;
+ size_t ap_len = 2;
+# endif
+#endif
+ const char *zone;
+ size_t i = 0;
+ char *p = s;
+ const char *f;
+
+ zone = NULL;
+#if HAVE_TM_ZONE
+ /* The POSIX test suite assumes that setting
+ the environment variable TZ to a new value before calling strftime()
+ will influence the result (the %Z format) even if the information in
+ TP is computed with a totally different time zone.
+ This is bogus: though POSIX allows bad behavior like this,
+ POSIX does not require it. Do the right thing instead. */
+ zone = (const char *) tp->tm_zone;
+#endif
+#if HAVE_TZNAME
+ if (ut)
+ {
+ if (! (zone && *zone))
+ zone = "GMT";
+ }
+ else
+ {
+ /* POSIX.1 8.1.1 requires that whenever strftime() is called, the
+ time zone names contained in the external variable `tzname' shall
+ be set as if the tzset() function had been called. */
+# if HAVE_TZSET
+ tzset ();
+# endif
+ }
+#endif
+
+ if (hour12 > 12)
+ hour12 -= 12;
+ else
+ if (hour12 == 0)
+ hour12 = 12;
- for (; *format && length < max; ++format)
+ for (f = format; *f != '\0'; ++f)
{
- if (*format != '%')
- add_char (*format);
- else
+ int pad = 0; /* Padding for number ('-', '_', or 0). */
+ int modifier; /* Field modifier ('E', 'O', or 0). */
+ int digits; /* Max digits for numeric format. */
+ int number_value; /* Numeric value to be printed. */
+ int negative_number; /* 1 if the number is negative. */
+ const char *subfmt;
+ char *bufp;
+ char buf[1 + (sizeof (int) < sizeof (time_t)
+ ? INT_STRLEN_BOUND (time_t)
+ : INT_STRLEN_BOUND (int))];
+ int width = -1;
+ int to_lowcase = 0;
+ int to_uppcase = 0;
+ int change_case = 0;
+ int format_char;
+
+#if DO_MULTIBYTE
+
+ switch (*f)
+ {
+ case '%':
+ break;
+
+ case '\a': case '\b': case '\t': case '\n':
+ case '\v': case '\f': case '\r':
+ case ' ': case '!': case '"': case '#': case '&': case'\'':
+ case '(': case ')': case '*': case '+': case ',': case '-':
+ case '.': case '/': case '0': case '1': case '2': case '3':
+ case '4': case '5': case '6': case '7': case '8': case '9':
+ case ':': case ';': case '<': case '=': case '>': case '?':
+ case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+ case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
+ case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
+ case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
+ case 'Y': case 'Z': case '[': case'\\': case ']': case '^':
+ case '_': case 'a': case 'b': case 'c': case 'd': case 'e':
+ case 'f': case 'g': case 'h': case 'i': case 'j': case 'k':
+ case 'l': case 'm': case 'n': case 'o': case 'p': case 'q':
+ case 'r': case 's': case 't': case 'u': case 'v': case 'w':
+ case 'x': case 'y': case 'z': case '{': case '|': case '}':
+ case '~':
+ /* The C Standard requires these 98 characters (plus '%') to
+ be in the basic execution character set. None of these
+ characters can start a multibyte sequence, so they need
+ not be analyzed further. */
+ add (1, *p = *f);
+ continue;
+
+ default:
+ /* Copy this multibyte sequence until we reach its end, find
+ an error, or come back to the initial shift state. */
+ {
+ mbstate_t mbstate = mbstate_zero;
+ size_t len = 0;
+
+ do
+ {
+ size_t bytes = mbrlen (f + len, (size_t) -1, &mbstate);
+
+ if (bytes == 0)
+ break;
+
+ if (bytes == (size_t) -2)
+ {
+ len += strlen (f + len);
+ break;
+ }
+
+ if (bytes == (size_t) -1)
+ {
+ len++;
+ break;
+ }
+
+ len += bytes;
+ }
+ while (! mbsinit (&mbstate));
+
+ cpy (len, f);
+ f += len - 1;
+ continue;
+ }
+ }
+
+#else /* ! DO_MULTIBYTE */
+
+ /* Either multibyte encodings are not supported, or they are
+ safe for formats, so any non-'%' byte can be copied through. */
+ if (*f != '%')
{
- ++format;
- /* Modifiers: */
- if (*format == '-')
+ add (1, *p = *f);
+ continue;
+ }
+
+#endif /* ! DO_MULTIBYTE */
+
+ /* Check for flags that can modify a format. */
+ while (1)
+ {
+ switch (*++f)
{
- pad = none;
- ++format;
+ /* This influences the number formats. */
+ case '_':
+ case '-':
+ case '0':
+ pad = *f;
+ continue;
+
+ /* This changes textual output. */
+ case '^':
+ to_uppcase = 1;
+ continue;
+ case '#':
+ change_case = 1;
+ continue;
+
+ default:
+ break;
}
- else if (*format == '_')
+ break;
+ }
+
+ /* As a GNU extension we allow to specify the field width. */
+ if (ISDIGIT (*f))
+ {
+ width = 0;
+ do
{
- pad = blank;
- ++format;
+ width *= 10;
+ width += *f - '0';
+ ++f;
}
- else
- pad = zero;
+ while (ISDIGIT (*f));
+ }
+
+ /* Check for modifiers. */
+ switch (*f)
+ {
+ case 'E':
+ case 'O':
+ modifier = *f++;
+ break;
+
+ default:
+ modifier = 0;
+ break;
+ }
+
+ /* Now do the specified format. */
+ format_char = *f;
+ switch (format_char)
+ {
+#define DO_NUMBER(d, v) \
+ digits = width == -1 ? d : width; \
+ number_value = v; goto do_number
+#define DO_NUMBER_SPACEPAD(d, v) \
+ digits = width == -1 ? d : width; \
+ number_value = v; goto do_number_spacepad
+
+ case '%':
+ if (modifier != 0)
+ goto bad_format;
+ add (1, *p = *f);
+ break;
- switch (*format)
+ case 'a':
+ if (modifier != 0)
+ goto bad_format;
+ if (change_case)
{
- /* Literal character fields: */
- case 0:
- case '%':
- add_char ('%');
- break;
- case 'n':
- add_char ('\n');
- break;
- case 't':
- add_char ('\t');
- break;
- default:
- add_char (*format);
- break;
+ to_uppcase = 1;
+ to_lowcase = 0;
+ }
+#if defined _NL_CURRENT || !HAVE_STRFTIME
+ cpy (aw_len, a_wkday);
+ break;
+#else
+ goto underlying_strftime;
+#endif
- /* Time fields: */
- case 'H':
- case 'k':
- length +=
- add_num2 (&string[length], tm->tm_hour, max - length,
- *format == 'H' ? pad : blank);
- break;
- case 'I':
- case 'l':
+ case 'A':
+ if (modifier != 0)
+ goto bad_format;
+ if (change_case)
+ {
+ to_uppcase = 1;
+ to_lowcase = 0;
+ }
+#if defined _NL_CURRENT || !HAVE_STRFTIME
+ cpy (strlen (f_wkday), f_wkday);
+ break;
+#else
+ goto underlying_strftime;
+#endif
+
+ case 'b':
+ case 'h': /* POSIX.2 extension. */
+ if (modifier != 0)
+ goto bad_format;
+#if defined _NL_CURRENT || !HAVE_STRFTIME
+ cpy (am_len, a_month);
+ break;
+#else
+ goto underlying_strftime;
+#endif
+
+ case 'B':
+ if (modifier != 0)
+ goto bad_format;
+ if (change_case)
+ {
+ to_uppcase = 1;
+ to_lowcase = 0;
+ }
+#if defined _NL_CURRENT || !HAVE_STRFTIME
+ cpy (strlen (f_month), f_month);
+ break;
+#else
+ goto underlying_strftime;
+#endif
+
+ case 'c':
+ if (modifier == 'O')
+ goto bad_format;
+#ifdef _NL_CURRENT
+ if (! (modifier == 'E'
+ && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_T_FMT)) != '\0'))
+ subfmt = _NL_CURRENT (LC_TIME, D_T_FMT);
+#else
+# if HAVE_STRFTIME
+ goto underlying_strftime;
+# else
+ subfmt = "%a %b %e %H:%M:%S %Y";
+# endif
+#endif
+
+ subformat:
+ {
+ char *old_start = p;
+ size_t len = my_strftime (NULL, (size_t) -1, subfmt, tp);
+ add (len, my_strftime (p, maxsize - i, subfmt, tp));
+
+ if (to_uppcase)
+ while (old_start < p)
+ {
+ *old_start = TOUPPER ((unsigned char) *old_start);
+ ++old_start;
+ }
+ }
+ break;
+
+#if HAVE_STRFTIME && ! (defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY)
+ underlying_strftime:
+ {
+ /* The relevant information is available only via the
+ underlying strftime implementation, so use that. */
+ char ufmt[4];
+ char *u = ufmt;
+ char ubuf[1024]; /* enough for any single format in practice */
+ size_t len;
+ *u++ = '%';
+ if (modifier != 0)
+ *u++ = modifier;
+ *u++ = format_char;
+ *u = '\0';
+ len = strftime (ubuf, sizeof ubuf, ufmt, tp);
+ if (len == 0 && ubuf[0] != '\0')
+ return 0;
+ cpy (len, ubuf);
+ }
+ break;
+#endif
+
+ case 'C': /* POSIX.2 extension. */
+ if (modifier == 'O')
+ goto bad_format;
+ if (modifier == 'E')
+ {
+#if HAVE_STRUCT_ERA_ENTRY
+ struct era_entry *era = _nl_get_era_entry (tp);
+ if (era)
+ {
+ size_t len = strlen (era->name_fmt);
+ cpy (len, era->name_fmt);
+ break;
+ }
+#else
+# if HAVE_STRFTIME
+ goto underlying_strftime;
+# endif
+#endif
+ }
+
+ {
+ int year = tp->tm_year + TM_YEAR_BASE;
+ DO_NUMBER (1, year / 100 - (year % 100 < 0));
+ }
+
+ case 'x':
+ if (modifier == 'O')
+ goto bad_format;
+#ifdef _NL_CURRENT
+ if (! (modifier == 'E'
+ && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_FMT)) != '\0'))
+ subfmt = _NL_CURRENT (LC_TIME, D_FMT);
+ goto subformat;
+#else
+# if HAVE_STRFTIME
+ goto underlying_strftime;
+# else
+ /* Fall through. */
+# endif
+#endif
+ case 'D': /* POSIX.2 extension. */
+ if (modifier != 0)
+ goto bad_format;
+ subfmt = "%m/%d/%y";
+ goto subformat;
+
+ case 'd':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_mday);
+
+ case 'e': /* POSIX.2 extension. */
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER_SPACEPAD (2, tp->tm_mday);
+
+ /* All numeric formats set DIGITS and NUMBER_VALUE and then
+ jump to one of these two labels. */
+
+ do_number_spacepad:
+ /* Force `_' flag unless overwritten by `0' flag. */
+ if (pad != '0')
+ pad = '_';
+
+ do_number:
+ /* Format the number according to the MODIFIER flag. */
+
+ if (modifier == 'O' && 0 <= number_value)
+ {
+#ifdef _NL_CURRENT
+ /* Get the locale specific alternate representation of
+ the number NUMBER_VALUE. If none exist NULL is returned. */
+ const char *cp = _nl_get_alt_digit (number_value);
+
+ if (cp != NULL)
+ {
+ size_t digitlen = strlen (cp);
+ if (digitlen != 0)
+ {
+ cpy (digitlen, cp);
+ break;
+ }
+ }
+#else
+# if HAVE_STRFTIME
+ goto underlying_strftime;
+# endif
+#endif
+ }
+ {
+ unsigned int u = number_value;
+
+ bufp = buf + sizeof (buf);
+ negative_number = number_value < 0;
+
+ if (negative_number)
+ u = -u;
+
+ do
+ *--bufp = u % 10 + '0';
+ while ((u /= 10) != 0);
+ }
+
+ do_number_sign_and_padding:
+ if (negative_number)
+ *--bufp = '-';
+
+ if (pad != '-')
+ {
+ int padding = digits - (buf + sizeof (buf) - bufp);
+
+ if (pad == '_')
+ {
+ while (0 < padding--)
+ *--bufp = ' ';
+ }
+ else
+ {
+ bufp += negative_number;
+ while (0 < padding--)
+ *--bufp = '0';
+ if (negative_number)
+ *--bufp = '-';
+ }
+ }
+
+ cpy (buf + sizeof (buf) - bufp, bufp);
+ break;
+
+ case 'F':
+ if (modifier != 0)
+ goto bad_format;
+ subfmt = "%Y-%m-%d";
+ goto subformat;
+
+ case 'H':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_hour);
+
+ case 'I':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, hour12);
+
+ case 'k': /* GNU extension. */
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER_SPACEPAD (2, tp->tm_hour);
+
+ case 'l': /* GNU extension. */
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER_SPACEPAD (2, hour12);
+
+ case 'j':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (3, 1 + tp->tm_yday);
+
+ case 'M':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_min);
+
+ case 'm':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_mon + 1);
+
+ case 'n': /* POSIX.2 extension. */
+ add (1, *p = '\n');
+ break;
+
+ case 'P':
+ to_lowcase = 1;
+#if !defined _NL_CURRENT && HAVE_STRFTIME
+ format_char = 'p';
+#endif
+ /* FALLTHROUGH */
+
+ case 'p':
+ if (change_case)
+ {
+ to_uppcase = 0;
+ to_lowcase = 1;
+ }
+#if defined _NL_CURRENT || !HAVE_STRFTIME
+ cpy (ap_len, ampm);
+ break;
+#else
+ goto underlying_strftime;
+#endif
+
+ case 'R': /* GNU extension. */
+ subfmt = "%H:%M";
+ goto subformat;
+
+ case 'r': /* POSIX.2 extension. */
+#ifdef _NL_CURRENT
+ if (*(subfmt = _NL_CURRENT (LC_TIME, T_FMT_AMPM)) == '\0')
+#endif
+ subfmt = "%I:%M:%S %p";
+ goto subformat;
+
+ case 'S':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_sec);
+
+ case 's': /* GNU extension. */
+ {
+ struct tm ltm;
+ time_t t;
+
+ ltm = *tp;
+ t = mktime (<m);
+
+ /* Generate string value for T using time_t arithmetic;
+ this works even if sizeof (long) < sizeof (time_t). */
+
+ bufp = buf + sizeof (buf);
+ negative_number = t < 0;
+
+ do
{
- int hour12;
-
- if (tm->tm_hour == 0)
- hour12 = 12;
- else if (tm->tm_hour > 12)
- hour12 = tm->tm_hour - 12;
- else
- hour12 = tm->tm_hour;
- length +=
- add_num2 (&string[length], hour12, max - length,
- *format == 'I' ? pad : blank);
+ int d = t % 10;
+ t /= 10;
+
+ if (negative_number)
+ {
+ d = -d;
+
+ /* Adjust if division truncates to minus infinity. */
+ if (0 < -1 % 10 && d < 0)
+ {
+ t++;
+ d += 10;
+ }
+ }
+
+ *--bufp = d + '0';
}
- break;
- case 'M':
- length +=
- add_num2 (&string[length], tm->tm_min, max - length, pad);
- break;
- case 'p':
- if (tm->tm_hour < 12)
- add_char ('A');
- else
- add_char ('P');
- add_char ('M');
- break;
- case 'r':
- length +=
- strftime (&string[length], max - length, "%I:%M:%S %p", tm);
- break;
- case 'R':
- length +=
- strftime (&string[length], max - length, "%H:%M", tm);
- break;
- case 'S':
- length +=
- add_num2 (&string[length], tm->tm_sec, max - length, pad);
- break;
- case 'T':
- length +=
- strftime (&string[length], max - length, "%H:%M:%S", tm);
- break;
- case 'X':
- length +=
- strftime (&string[length], max - length, "%H:%M:%S", tm);
- break;
- case 'Z':
-#ifdef HAVE_TM_ZONE
- length += add_str (&string[length], tm->tm_zone, max - length);
+ while (t != 0);
+
+ digits = 1;
+ goto do_number_sign_and_padding;
+ }
+
+ case 'X':
+ if (modifier == 'O')
+ goto bad_format;
+#ifdef _NL_CURRENT
+ if (! (modifier == 'E'
+ && *(subfmt = _NL_CURRENT (LC_TIME, ERA_T_FMT)) != '\0'))
+ subfmt = _NL_CURRENT (LC_TIME, T_FMT);
+ goto subformat;
#else
-#ifdef HAVE_TZNAME
- if (tm->tm_isdst && tzname[1] && *tzname[1])
- length += add_str (&string[length], tzname[1], max - length);
- else
- length += add_str (&string[length], tzname[0], max - length);
+# if HAVE_STRFTIME
+ goto underlying_strftime;
+# else
+ /* Fall through. */
+# endif
+#endif
+ case 'T': /* POSIX.2 extension. */
+ subfmt = "%H:%M:%S";
+ goto subformat;
+
+ case 't': /* POSIX.2 extension. */
+ add (1, *p = '\t');
+ break;
+
+ case 'u': /* POSIX.2 extension. */
+ DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1);
+
+ case 'U':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7);
+
+ case 'V':
+ case 'g': /* GNU extension. */
+ case 'G': /* GNU extension. */
+ if (modifier == 'E')
+ goto bad_format;
+ {
+ int year = tp->tm_year + TM_YEAR_BASE;
+ int days = iso_week_days (tp->tm_yday, tp->tm_wday);
+
+ if (days < 0)
+ {
+ /* This ISO week belongs to the previous year. */
+ year--;
+ days = iso_week_days (tp->tm_yday + (365 + __isleap (year)),
+ tp->tm_wday);
+ }
+ else
+ {
+ int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)),
+ tp->tm_wday);
+ if (0 <= d)
+ {
+ /* This ISO week belongs to the next year. */
+ year++;
+ days = d;
+ }
+ }
+
+ switch (*f)
+ {
+ case 'g':
+ DO_NUMBER (2, (year % 100 + 100) % 100);
+
+ case 'G':
+ DO_NUMBER (1, year);
+
+ default:
+ DO_NUMBER (2, days / 7 + 1);
+ }
+ }
+
+ case 'W':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7);
+
+ case 'w':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (1, tp->tm_wday);
+
+ case 'Y':
+ if (modifier == 'E')
+ {
+#if HAVE_STRUCT_ERA_ENTRY
+ struct era_entry *era = _nl_get_era_entry (tp);
+ if (era)
+ {
+ subfmt = strchr (era->name_fmt, '\0') + 1;
+ goto subformat;
+ }
#else
- length += add_str (&string[length], zone_name (tm), max - length);
+# if HAVE_STRFTIME
+ goto underlying_strftime;
+# endif
#endif
+ }
+ if (modifier == 'O')
+ goto bad_format;
+ else
+ DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE);
+
+ case 'y':
+ if (modifier == 'E')
+ {
+#if HAVE_STRUCT_ERA_ENTRY
+ struct era_entry *era = _nl_get_era_entry (tp);
+ if (era)
+ {
+ int delta = tp->tm_year - era->start_date[0];
+ DO_NUMBER (1, (era->offset
+ + (era->direction == '-' ? -delta : delta)));
+ }
+#else
+# if HAVE_STRFTIME
+ goto underlying_strftime;
+# endif
#endif
- break;
+ }
+ DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100);
- /* Date fields: */
- case 'a':
- add_char (days[tm->tm_wday][0]);
- add_char (days[tm->tm_wday][1]);
- add_char (days[tm->tm_wday][2]);
- break;
- case 'A':
- length +=
- add_str (&string[length], days[tm->tm_wday], max - length);
- break;
- case 'b':
- case 'h':
- add_char (months[tm->tm_mon][0]);
- add_char (months[tm->tm_mon][1]);
- add_char (months[tm->tm_mon][2]);
- break;
- case 'B':
- length +=
- add_str (&string[length], months[tm->tm_mon], max - length);
- break;
- case 'c':
- length +=
- strftime (&string[length], max - length,
- "%a %b %d %H:%M:%S %Z %Y", tm);
- break;
- case 'C':
- length +=
- add_num2 (&string[length], (tm->tm_year + 1900) / 100,
- max - length, pad);
- break;
- case 'd':
- length +=
- add_num2 (&string[length], tm->tm_mday, max - length, pad);
- break;
- case 'e':
- length +=
- add_num2 (&string[length], tm->tm_mday, max - length, blank);
- break;
- case 'D':
- length +=
- strftime (&string[length], max - length, "%m/%d/%y", tm);
- break;
- case 'j':
- length +=
- add_num3 (&string[length], tm->tm_yday + 1, max - length, pad);
- break;
- case 'm':
- length +=
- add_num2 (&string[length], tm->tm_mon + 1, max - length, pad);
- break;
- case 'U':
- length +=
- add_num2 (&string[length], sun_week (tm), max - length, pad);
- break;
- case 'w':
- add_char (tm->tm_wday + '0');
- break;
- case 'W':
- length +=
- add_num2 (&string[length], mon_week (tm), max - length, pad);
- break;
- case 'x':
- length +=
- strftime (&string[length], max - length, "%m/%d/%y", tm);
- break;
- case 'y':
- length +=
- add_num2 (&string[length], tm->tm_year % 100,
- max - length, pad);
- break;
- case 'Y':
- add_char ((tm->tm_year + 1900) / 1000 + '0');
- length +=
- add_num3 (&string[length],
- (1900 + tm->tm_year) % 1000, max - length, zero);
- break;
+ case 'Z':
+ if (change_case)
+ {
+ to_uppcase = 0;
+ to_lowcase = 1;
}
+
+#if HAVE_TZNAME
+ /* The tzset() call might have changed the value. */
+ if (!(zone && *zone) && tp->tm_isdst >= 0)
+ zone = tzname[tp->tm_isdst];
+#endif
+ if (! zone)
+ zone = ""; /* POSIX.2 requires the empty string here. */
+
+ cpy (strlen (zone), zone);
+ break;
+
+ case 'z': /* GNU extension. */
+ if (tp->tm_isdst < 0)
+ break;
+
+ {
+ int diff;
+#if HAVE_TM_GMTOFF
+ diff = tp->tm_gmtoff;
+#else
+ if (ut)
+ diff = 0;
+ else
+ {
+ struct tm gtm;
+ struct tm ltm;
+ time_t lt;
+
+ ltm = *tp;
+ lt = mktime (<m);
+
+ if (lt == (time_t) -1)
+ {
+ /* mktime returns -1 for errors, but -1 is also a
+ valid time_t value. Check whether an error really
+ occurred. */
+ struct tm tm;
+
+ if (! my_strftime_localtime_r (<, &tm)
+ || ((ltm.tm_sec ^ tm.tm_sec)
+ | (ltm.tm_min ^ tm.tm_min)
+ | (ltm.tm_hour ^ tm.tm_hour)
+ | (ltm.tm_mday ^ tm.tm_mday)
+ | (ltm.tm_mon ^ tm.tm_mon)
+ | (ltm.tm_year ^ tm.tm_year)))
+ break;
+ }
+
+ if (! my_strftime_gmtime_r (<, >m))
+ break;
+
+ diff = tm_diff (<m, >m);
+ }
+#endif
+
+ if (diff < 0)
+ {
+ add (1, *p = '-');
+ diff = -diff;
+ }
+ else
+ add (1, *p = '+');
+
+ diff /= 60;
+ DO_NUMBER (4, (diff / 60) * 100 + diff % 60);
+ }
+
+ case '\0': /* GNU extension: % at end of format. */
+ --f;
+ /* Fall through. */
+ default:
+ /* Unknown format; output the format, including the '%',
+ since this is most likely the right thing to do if a
+ multibyte string has been misparsed. */
+ bad_format:
+ {
+ int flen;
+ for (flen = 1; f[1 - flen] != '%'; flen++)
+ continue;
+ cpy (flen, &f[1 - flen]);
+ }
+ break;
}
}
- add_char (0);
- return length - 1;
+
+ if (p && maxsize != 0)
+ *p = '\0';
+ return i;
}
+
+
+#ifdef emacs
+/* For Emacs we have a separate interface which corresponds to the normal
+ strftime function and does not have the extra information whether the
+ TP arguments comes from a `gmtime' call or not. */
+size_t
+emacs_strftime (s, maxsize, format, tp)
+ char *s;
+ size_t maxsize;
+ const char *format;
+ const struct tm *tp;
+{
+ return my_strftime (s, maxsize, format, tp, 0);
+}
+#endif
projects / gnulib.git / blobdiff