Welcome to mirror list, hosted at ThFree Co, Russian Federation.

cygwin.com/git/newlib-cygwin.git - Unnamed repository; edit this file 'description' to name the repository.
summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat (limited to 'newlib/libc/time/strftime.c')
-rw-r--r--newlib/libc/time/strftime.c575
1 files changed, 121 insertions, 454 deletions
diff --git a/newlib/libc/time/strftime.c b/newlib/libc/time/strftime.c
index a3fdb745a..9084d9ffb 100644
--- a/newlib/libc/time/strftime.c
+++ b/newlib/libc/time/strftime.c
@@ -1,7 +1,6 @@
/*
* strftime.c
* Original Author: G. Haley
- * Additions from: Eric Blake
*
* Places characters into the array pointed to by s as controlled by the string
* pointed to by format. If the total number of resulting characters including
@@ -33,195 +32,95 @@ TRAD_SYNOPSIS
DESCRIPTION
<<strftime>> converts a <<struct tm>> representation of the time (at
-<[timp]>) into a null-terminated string, starting at <[s]> and occupying
-no more than <[maxsize]> characters.
+<[timp]>) into a string, starting at <[s]> and occupying no more than
+<[maxsize]> characters.
You control the format of the output using the string at <[format]>.
<<*<[format]>>> can contain two kinds of specifications: text to be
copied literally into the formatted string, and time conversion
-specifications. Time conversion specifications are two- and
-three-character sequences beginning with `<<%>>' (use `<<%%>>' to
-include a percent sign in the output). Each defined conversion
-specification selects only the specified field(s) of calendar time
-data from <<*<[timp]>>>, and converts it to a string in one of the
-following ways:
+specifications. Time conversion specifications are two-character
+sequences beginning with `<<%>>' (use `<<%%>>' to include a percent
+sign in the output). Each defined conversion specification selects a
+field of calendar time data from <<*<[timp]>>>, and converts it to a
+string in one of the following ways:
o+
o %a
-A three-letter abbreviation for the day of the week. [tm_wday]
+An abbreviation for the day of the week.
o %A
-The full name for the day of the week, one of `<<Sunday>>',
-`<<Monday>>', `<<Tuesday>>', `<<Wednesday>>', `<<Thursday>>',
-`<<Friday>>', or `<<Saturday>>'. [tm_wday]
+The full name for the day of the week.
o %b
-A three-letter abbreviation for the month name. [tm_mon]
+An abbreviation for the month name.
o %B
-The full name of the month, one of `<<January>>', `<<February>>',
-`<<March>>', `<<April>>', `<<May>>', `<<June>>', `<<July>>',
-`<<August>>', `<<September>>', `<<October>>', `<<November>>',
-`<<December>>'. [tm_mon]
+The full name of the month.
o %c
A string representing the complete date and time, in the form
-`<<"%a %b %e %H:%M:%S %Y">>' (example "Mon Apr 01 13:13:13
-1992"). [tm_sec, tm_min, tm_hour, tm_mday, tm_mon, tm_year, tm_wday]
-
-o %C
-The century, that is, the year divided by 100 then truncated. For
-4-digit years, the result is zero-padded and exactly two characters;
-but for other years, there may a negative sign or more digits. In
-this way, `<<%C%y>>' is equivalent to `<<%Y>>'. [tm_year]
-
-o %d
-The day of the month, formatted with two digits (from `<<01>>' to
-`<<31>>'). [tm_mday]
+. Mon Apr 01 13:13:13 1992
-o %D
-A string representing the date, in the form `<<"%m/%d/%y">>'.
-[tm_mday, tm_mon, tm_year]
+o %d
+The day of the month, formatted with two digits.
o %e
-The day of the month, formatted with leading space if single digit
-(from `<<1>>' to `<<31>>'). [tm_mday]
-
-o %E<<x>>
-In some locales, the E modifier selects alternative representations of
-certain modifiers <<x>>. But in the "C" locale supported by newlib,
-it is ignored, and treated as %<<x>>.
-
-o %F
-A string representing the ISO 8601:2000 date format, in the form
-`<<"%Y-%m-%d">>'. [tm_mday, tm_mon, tm_year]
-
-o %g
-The last two digits of the week-based year, see specifier %G (from
-`<<00>>' to `<<99>>'). [tm_year, tm_wday, tm_yday]
-
-o %G
-The week-based year. In the ISO 8601:2000 calendar, week 1 of the year
-includes January 4th, and begin on Mondays. Therefore, if January 1st,
-2nd, or 3rd falls on a Sunday, that day and earlier belong to the last
-week of the previous year; and if December 29th, 30th, or 31st falls
-on Monday, that day and later belong to week 1 of the next year. For
-consistency with %Y, it always has at least four characters.
-Example: "%G" for Saturday 2nd January 1999 gives "1998", and for
-Tuesday 30th December 1997 gives "1998". [tm_year, tm_wday, tm_yday]
-
-o %h
-A three-letter abbreviation for the month name (synonym for
-"%b"). [tm_mon]
+The day of the month, formatted with leading space if single digit.
o %H
-The hour (on a 24-hour clock), formatted with two digits (from
-`<<00>>' to `<<23>>'). [tm_hour]
+The hour (on a 24-hour clock), formatted with two digits.
o %I
-The hour (on a 12-hour clock), formatted with two digits (from
-`<<01>>' to `<<12>>'). [tm_hour]
+The hour (on a 12-hour clock), formatted with two digits.
o %j
The count of days in the year, formatted with three digits
-(from `<<001>>' to `<<366>>'). [tm_yday]
-
-o %k
-The hour (on a 24-hour clock), formatted with leading space if single
-digit (from `<<0>>' to `<<23>>'). Non-POSIX extension. [tm_hour]
-
-o %l
-The hour (on a 12-hour clock), formatted with leading space if single
-digit (from `<<1>>' to `<<12>>'). Non-POSIX extension. [tm_hour]
+(from `<<001>>' to `<<366>>').
o %m
-The month number, formatted with two digits (from `<<01>>' to `<<12>>').
-[tm_mon]
+The month number, formatted with two digits.
o %M
-The minute, formatted with two digits (from `<<00>>' to `<<59>>'). [tm_min]
-
-o %n
-A newline character (`<<\n>>').
-
-o %O<<x>>
-In some locales, the O modifier selects alternative digit characters
-for certain modifiers <<x>>. But in the "C" locale supported by newlib, it
-is ignored, and treated as %<<x>>.
+The minute, formatted with two digits.
o %p
-Either `<<AM>>' or `<<PM>>' as appropriate. [tm_hour]
-
-o %r
-The 12-hour time, to the second. Equivalent to "%I:%M:%S %p". [tm_sec,
-tm_min, tm_hour]
-
-o %R
-The 24-hour time, to the minute. Equivalent to "%H:%M". [tm_min, tm_hour]
+Either `<<AM>>' or `<<PM>>' as appropriate.
o %S
-The second, formatted with two digits (from `<<00>>' to `<<60>>'). The
-value 60 accounts for the occasional leap second. [tm_sec]
-
-o %t
-A tab character (`<<\t>>').
-
-o %T
-The 24-hour time, to the second. Equivalent to "%H:%M:%S". [tm_sec,
-tm_min, tm_hour]
-
-o %u
-The weekday as a number, 1-based from Monday (from `<<1>>' to
-`<<7>>'). [tm_wday]
+The second, formatted with two digits.
o %U
-The week number, where weeks start on Sunday, week 1 contains the first
-Sunday in a year, and earlier days are in week 0. Formatted with two
-digits (from `<<00>>' to `<<53>>'). See also <<%W>>. [tm_wday, tm_yday]
-
-o %V
-The week number, where weeks start on Monday, week 1 contains January 4th,
-and earlier days are in the previous year. Formatted with two digits
-(from `<<01>>' to `<<53>>'). See also <<%G>>. [tm_year, tm_wday, tm_yday]
+The week number, formatted with two digits (from `<<00>>' to `<<53>>';
+week number 1 is taken as beginning with the first Sunday in a year).
+See also <<%W>>.
o %w
-The weekday as a number, 0-based from Sunday (from `<<0>>' to `<<6>>').
-[tm_wday]
+A single digit representing the day of the week: Sunday is day <<0>>.
o %W
-The week number, where weeks start on Monday, week 1 contains the first
-Monday in a year, and earlier days are in week 0. Formatted with two
-digits (from `<<00>>' to `<<53>>'). [tm_wday, tm_yday]
+Another version of the week number: like `<<%U>>', but counting week 1
+as beginning with the first Monday in a year.
+o
o %x
-A string representing the complete date, equivalent to "%m/%d/%y".
-[tm_mon, tm_mday, tm_year]
+A string representing the complete date, in a format like
+. Mon Apr 01 1992
o %X
A string representing the full time of day (hours, minutes, and
-seconds), equivalent to "%H:%M:%S". [tm_sec, tm_min, tm_hour]
+seconds), in a format like
+. 13:13:13
o %y
-The last two digits of the year (from `<<00>>' to `<<99>>'). [tm_year]
+The last two digits of the year.
o %Y
-The full year, equivalent to <<%C%y>>. It will always have at least four
-characters, but may have more. The year is accurate even when tm_year
-added to the offset of 1900 overflows an int. [tm_year]
-
-o %z
-The offset from UTC. The format consists of a sign (negative is west of
-Greewich), two characters for hour, then two characters for minutes
-(-hhmm or +hhmm). If tm_isdst is negative, the offset is unknown and no
-output is generated; if it is zero, the offset is the standard offset for
-the current time zone; and if it is positive, the offset is the daylight
-savings offset for the current timezone. The offset is determined from
-the TZ environment variable, as if by calling tzset(). [tm_isdst]
+The full year, formatted with four digits to include the century.
o %Z
-The time zone name. If tm_isdst is negative, no output is generated.
-Otherwise, the time zone name is based on the TZ environment variable,
-as if by calling tzset(). [tm_isdst]
+The time zone name. If tm_isdst is -1, no output is generated.
+Otherwise, the time zone name based on the TZ environment variable
+is used.
o %%
A single character, `<<%>>'.
@@ -238,12 +137,7 @@ parts of <<*<[format]>>> that could be completely filled in within the
PORTABILITY
ANSI C requires <<strftime>>, but does not specify the contents of
<<*<[s]>>> when the formatted string would require more than
-<[maxsize]> characters. Unrecognized specifiers and fields of
-<<timp>> that are out of range cause undefined results. Since some
-formats expand to 0 bytes, it is wise to set <<*<[s]>>> to a nonzero
-value beforehand to distinguish between failure and an empty string.
-This implementation does not support <<s>> being NULL, nor overlapping
-<<s>> and <<format>>.
+<[maxsize]> characters.
<<strftime>> requires no supporting OS subroutines.
*/
@@ -251,8 +145,6 @@ This implementation does not support <<s>> being NULL, nor overlapping
#include <stddef.h>
#include <stdio.h>
#include <time.h>
-#include <string.h>
-#include <stdlib.h>
#include "local.h"
static _CONST int dname_len[7] =
@@ -270,53 +162,6 @@ static _CONST char *_CONST mname[12] =
"May", "June", "July", "August", "September", "October", "November",
"December"};
-/* Using the tm_year, tm_wday, and tm_yday components of TIM_P, return
- -1, 0, or 1 as the adjustment to add to the year for the ISO week
- numbering used in "%g%G%V", avoiding overflow. */
-static int
-_DEFUN (iso_year_adjust, (tim_p),
- _CONST struct tm *tim_p)
-{
- /* Account for fact that tm_year==0 is year 1900. */
- int leap = isleap (tim_p->tm_year + (YEAR_BASE
- - (tim_p->tm_year < 0 ? 0 : 2000)));
-
- /* Pack the yday, wday, and leap year into a single int since there are so
- many disparate cases. */
-#define PACK(yd, wd, lp) (((yd) << 4) + (wd << 1) + (lp))
- switch (PACK (tim_p->tm_yday, tim_p->tm_wday, leap))
- {
- case PACK (0, 5, 0): /* Jan 1 is Fri, not leap. */
- case PACK (0, 6, 0): /* Jan 1 is Sat, not leap. */
- case PACK (0, 0, 0): /* Jan 1 is Sun, not leap. */
- case PACK (0, 5, 1): /* Jan 1 is Fri, leap year. */
- case PACK (0, 6, 1): /* Jan 1 is Sat, leap year. */
- case PACK (0, 0, 1): /* Jan 1 is Sun, leap year. */
- case PACK (1, 6, 0): /* Jan 2 is Sat, not leap. */
- case PACK (1, 0, 0): /* Jan 2 is Sun, not leap. */
- case PACK (1, 6, 1): /* Jan 2 is Sat, leap year. */
- case PACK (1, 0, 1): /* Jan 2 is Sun, leap year. */
- case PACK (2, 0, 0): /* Jan 3 is Sun, not leap. */
- case PACK (2, 0, 1): /* Jan 3 is Sun, leap year. */
- return -1; /* Belongs to last week of previous year. */
- case PACK (362, 1, 0): /* Dec 29 is Mon, not leap. */
- case PACK (363, 1, 1): /* Dec 29 is Mon, leap year. */
- case PACK (363, 1, 0): /* Dec 30 is Mon, not leap. */
- case PACK (363, 2, 0): /* Dec 30 is Tue, not leap. */
- case PACK (364, 1, 1): /* Dec 30 is Mon, leap year. */
- case PACK (364, 2, 1): /* Dec 30 is Tue, leap year. */
- case PACK (364, 1, 0): /* Dec 31 is Mon, not leap. */
- case PACK (364, 2, 0): /* Dec 31 is Tue, not leap. */
- case PACK (364, 3, 0): /* Dec 31 is Wed, not leap. */
- case PACK (365, 1, 1): /* Dec 31 is Mon, leap year. */
- case PACK (365, 2, 1): /* Dec 31 is Tue, leap year. */
- case PACK (365, 3, 1): /* Dec 31 is Wed, leap year. */
- return 1; /* Belongs to first week of next year. */
- }
- return 0; /* Belongs to specified year. */
-#undef PACK
-}
-
size_t
_DEFUN (strftime, (s, maxsize, format, tim_p),
char *s _AND
@@ -341,9 +186,6 @@ _DEFUN (strftime, (s, maxsize, format, tim_p),
break;
format++;
- if (*format == 'E' || *format == 'O')
- format++;
-
switch (*format)
{
case 'a':
@@ -388,141 +230,52 @@ _DEFUN (strftime, (s, maxsize, format, tim_p),
}
break;
case 'c':
- {
- /* Length is not known because of %C%y, so recurse. */
- size_t adjust = strftime (&s[count], maxsize - count,
- "%a %b %e %H:%M:%S %C%y", tim_p);
- if (adjust > 0)
- count += adjust;
- else
- return 0;
- }
- break;
- case 'C':
- {
- /* Examples of (tm_year + YEAR_BASE) that show how %Y == %C%y
- with 32-bit int.
- %Y %C %y
- 2147485547 21474855 47
- 10000 100 00
- 9999 99 99
- 0999 09 99
- 0099 00 99
- 0001 00 01
- 0000 00 00
- -001 -0 01
- -099 -0 99
- -999 -9 99
- -1000 -10 00
- -10000 -100 00
- -2147481748 -21474817 48
-
- Be careful of both overflow and sign adjustment due to the
- asymmetric range of years.
- */
- int neg = tim_p->tm_year < -YEAR_BASE;
- int century = tim_p->tm_year >= 0
- ? tim_p->tm_year / 100 + YEAR_BASE / 100
- : abs (tim_p->tm_year + YEAR_BASE) / 100;
- count += snprintf (&s[count], maxsize - count, "%s%.*d",
- neg ? "-" : "", 2 - neg, century);
- if (count >= maxsize)
- return 0;
- }
- break;
- case 'd':
- case 'e':
- if (count < maxsize - 2)
+ if (count < maxsize - 24)
{
- sprintf (&s[count], *format == 'd' ? "%.2d" : "%2d",
- tim_p->tm_mday);
- count += 2;
+ for (i = 0; i < 3; i++)
+ s[count++] =
+ dname[tim_p->tm_wday][i];
+ s[count++] = ' ';
+ for (i = 0; i < 3; i++)
+ s[count++] =
+ mname[tim_p->tm_mon][i];
+
+ sprintf (&s[count],
+ " %.2d %2.2d:%2.2d:%2.2d %.4d",
+ tim_p->tm_mday, tim_p->tm_hour,
+ tim_p->tm_min,
+ tim_p->tm_sec, 1900 +
+ tim_p->tm_year);
+ count += 17;
}
else
return 0;
break;
- case 'D':
- case 'x':
- /* %m/%d/%y */
- if (count < maxsize - 8)
+ case 'd':
+ if (count < maxsize - 2)
{
- sprintf (&s[count], "%.2d/%.2d/%.2d",
- tim_p->tm_mon + 1, tim_p->tm_mday,
- tim_p->tm_year >= 0 ? tim_p->tm_year % 100
- : abs (tim_p->tm_year + YEAR_BASE) % 100);
- count += 8;
+ sprintf (&s[count], "%.2d",
+ tim_p->tm_mday);
+ count += 2;
}
else
return 0;
break;
- case 'F':
- {
- /* Length is not known because of %C%y, so recurse. */
- size_t adjust = strftime (&s[count], maxsize - count,
- "%C%y-%m-%d", tim_p);
- if (adjust > 0)
- count += adjust;
- else
- return 0;
- }
- break;
- case 'g':
+ case 'e':
if (count < maxsize - 2)
{
- /* Be careful of both overflow and negative years, thanks to
- the asymmetric range of years. */
- int adjust = iso_year_adjust (tim_p);
- int year = tim_p->tm_year >= 0 ? tim_p->tm_year % 100
- : abs (tim_p->tm_year + YEAR_BASE) % 100;
- if (adjust < 0 && tim_p->tm_year <= -YEAR_BASE)
- adjust = 1;
- else if (adjust > 0 && tim_p->tm_year < -YEAR_BASE)
- adjust = -1;
- sprintf (&s[count], "%.2d",
- ((year + adjust) % 100 + 100) % 100);
+ sprintf (&s[count], "%2d",
+ tim_p->tm_mday);
count += 2;
}
else
return 0;
- break;
- case 'G':
- {
- /* See the comments for 'C' and 'Y'; this is a variable length
- field. Although there is no requirement for a minimum number
- of digits, we use 4 for consistency with 'Y'. */
- int neg = tim_p->tm_year < -YEAR_BASE;
- int adjust = iso_year_adjust (tim_p);
- int century = tim_p->tm_year >= 0
- ? tim_p->tm_year / 100 + YEAR_BASE / 100
- : abs (tim_p->tm_year + YEAR_BASE) / 100;
- int year = tim_p->tm_year >= 0 ? tim_p->tm_year % 100
- : abs (tim_p->tm_year + YEAR_BASE) % 100;
- if (adjust < 0 && tim_p->tm_year <= -YEAR_BASE)
- neg = adjust = 1;
- else if (adjust > 0 && neg)
- adjust = -1;
- year += adjust;
- if (year == -1)
- {
- year = 99;
- --century;
- }
- else if (year == 100)
- {
- year = 0;
- ++century;
- }
- count += snprintf (&s[count], maxsize - count, "%s%.*d%.2d",
- neg ? "-" : "", 2 - neg, century, year);
- if (count >= maxsize)
- return 0;
- }
- break;
+ break;
case 'H':
case 'k':
if (count < maxsize - 2)
{
- sprintf (&s[count], *format == 'k' ? "%2d" : "%.2d",
+ sprintf (&s[count], *format == 'k' ? "%2d" : "%2.2d",
tim_p->tm_hour);
count += 2;
}
@@ -541,7 +294,7 @@ _DEFUN (strftime, (s, maxsize, format, tim_p),
}
else
{
- sprintf (&s[count], *format == 'I' ? "%.2d" : "%2d",
+ sprintf (&s[count], (*format == 'I') ? "%.2d" : "%2d",
tim_p->tm_hour % 12);
count += 2;
}
@@ -572,19 +325,13 @@ _DEFUN (strftime, (s, maxsize, format, tim_p),
case 'M':
if (count < maxsize - 2)
{
- sprintf (&s[count], "%.2d",
+ sprintf (&s[count], "%2.2d",
tim_p->tm_min);
count += 2;
}
else
return 0;
break;
- case 'n':
- if (count < maxsize - 1)
- s[count++] = '\n';
- else
- return 0;
- break;
case 'p':
if (count < maxsize - 2)
{
@@ -598,133 +345,76 @@ _DEFUN (strftime, (s, maxsize, format, tim_p),
else
return 0;
break;
- case 'r':
- if (count < maxsize - 11)
+ case 'S':
+ if (count < maxsize - 2)
{
- if (tim_p->tm_hour == 0 ||
- tim_p->tm_hour == 12)
- {
- s[count++] = '1';
- s[count++] = '2';
- }
- else
- {
- sprintf (&s[count], "%.2d", tim_p->tm_hour % 12);
- count += 2;
- }
- s[count++] = ':';
- sprintf (&s[count], "%.2d",
- tim_p->tm_min);
- count += 2;
- s[count++] = ':';
- sprintf (&s[count], "%.2d",
+ sprintf (&s[count], "%2.2d",
tim_p->tm_sec);
count += 2;
- s[count++] = ' ';
- if (tim_p->tm_hour < 12)
- s[count++] = 'A';
- else
- s[count++] = 'P';
-
- s[count++] = 'M';
}
else
return 0;
break;
- case 'R':
- if (count < maxsize - 5)
- {
- sprintf (&s[count], "%.2d:%.2d", tim_p->tm_hour, tim_p->tm_min);
- count += 5;
- }
- else
- return 0;
- break;
- case 'S':
+ case 'U':
if (count < maxsize - 2)
{
- sprintf (&s[count], "%.2d",
- tim_p->tm_sec);
+ sprintf (&s[count], "%2.2d",
+ (tim_p->tm_yday + 7 -
+ tim_p->tm_wday) / 7);
count += 2;
}
else
return 0;
break;
- case 't':
+ case 'w':
if (count < maxsize - 1)
- s[count++] = '\t';
+ {
+ sprintf (&s[count], "%1.1d",
+ tim_p->tm_wday);
+ count++;
+ }
else
return 0;
break;
- case 'T':
- case 'X':
- if (count < maxsize - 8)
- {
- sprintf (&s[count], "%.2d:%.2d:%.2d", tim_p->tm_hour,
- tim_p->tm_min, tim_p->tm_sec);
- count += 8;
- }
- else
- return 0;
- break;
- case 'u':
- if (count < maxsize - 1)
- {
- if (tim_p->tm_wday == 0)
- s[count++] = '7';
- else
- s[count++] = '0' + tim_p->tm_wday;
- }
- else
- return 0;
- break;
- case 'U':
+ case 'W':
if (count < maxsize - 2)
{
- sprintf (&s[count], "%.2d",
+ int wday = (tim_p->tm_wday) ? tim_p->tm_wday - 1 : 6;
+ sprintf (&s[count], "%2.2d",
(tim_p->tm_yday + 7 -
- tim_p->tm_wday) / 7);
+ wday) / 7);
count += 2;
}
else
return 0;
break;
- case 'V':
- if (count < maxsize - 2)
+ case 'x':
+ if (count < maxsize - 15)
{
- int adjust = iso_year_adjust (tim_p);
- int wday = (tim_p->tm_wday) ? tim_p->tm_wday - 1 : 6;
- int week = (tim_p->tm_yday + 10 - wday) / 7;
- if (adjust > 0)
- week = 1;
- else if (adjust < 0)
- /* Previous year has 53 weeks if current year starts on
- Fri, and also if current year starts on Sat and
- previous year was leap year. */
- week = 52 + (4 >= (wday - tim_p->tm_yday
- - isleap (tim_p->tm_year
- + (YEAR_BASE - 1
- - (tim_p->tm_year < 0
- ? 0 : 2000)))));
- sprintf (&s[count], "%.2d", week);
- count += 2;
+ for (i = 0; i < 3; i++)
+ s[count++] =
+ dname[tim_p->tm_wday][i];
+ s[count++] = ' ';
+ for (i = 0; i < 3; i++)
+ s[count++] =
+ mname[tim_p->tm_mon][i];
+
+ sprintf (&s[count],
+ " %.2d %.4d", tim_p->tm_mday,
+ 1900 + tim_p->tm_year);
+ count += 8;
}
else
return 0;
- break;
- case 'w':
- if (count < maxsize - 1)
- s[count++] = '0' + tim_p->tm_wday;
- else
- return 0;
break;
- case 'W':
- if (count < maxsize - 2)
+ case 'X':
+ if (count < maxsize - 8)
{
- int wday = (tim_p->tm_wday) ? tim_p->tm_wday - 1 : 6;
- sprintf (&s[count], "%.2d",
- (tim_p->tm_yday + 7 - wday) / 7);
- count += 2;
+ sprintf (&s[count],
+ "%2.2d:%2.2d:%2.2d",
+ tim_p->tm_hour, tim_p->tm_min,
+ tim_p->tm_sec);
+ count += 8;
}
else
return 0;
@@ -732,58 +422,36 @@ _DEFUN (strftime, (s, maxsize, format, tim_p),
case 'y':
if (count < maxsize - 2)
{
- /* Be careful of both overflow and negative years, thanks to
- the asymmetric range of years. */
- int year = tim_p->tm_year >= 0 ? tim_p->tm_year % 100
- : abs (tim_p->tm_year + YEAR_BASE) % 100;
- sprintf (&s[count], "%.2d", year);
+ /* The year could be greater than 100, so we need the value
+ modulo 100. The year could be negative, so we need to
+ correct for a possible negative remainder. */
+ sprintf (&s[count], "%2.2d",
+ (tim_p->tm_year % 100 + 100) % 100);
count += 2;
}
else
return 0;
break;
case 'Y':
- {
- /* Length is not known because of %C%y, so recurse. */
- size_t adjust = strftime (&s[count], maxsize - count,
- "%C%y", tim_p);
- if (adjust > 0)
- count += adjust;
- else
- return 0;
- }
+ if (count < maxsize - 4)
+ {
+ sprintf (&s[count], "%.4d",
+ 1900 + tim_p->tm_year);
+ count += 4;
+ }
+ else
+ return 0;
break;
- case 'z':
- if (tim_p->tm_isdst >= 0)
- {
- if (count < maxsize - 5)
- {
- long offset;
- __tzinfo_type *tz = __gettzinfo ();
- TZ_LOCK;
- /* The sign of this is exactly opposite the envvar TZ. We
- could directly use the global _timezone for tm_isdst==0,
- but have to use __tzrule for daylight savings. */
- offset = -tz->__tzrule[tim_p->tm_isdst > 0].offset;
- TZ_UNLOCK;
- sprintf (&s[count], "%+03ld%.2ld", offset / SECSPERHOUR,
- labs (offset / SECSPERMIN) % 60L);
- count += 5;
- }
- else
- return 0;
- }
- break;
case 'Z':
if (tim_p->tm_isdst >= 0)
{
int size;
TZ_LOCK;
- size = strlen(_tzname[tim_p->tm_isdst > 0]);
+ size = strlen(_tzname[tim_p->tm_isdst]);
for (i = 0; i < size; i++)
{
if (count < maxsize - 1)
- s[count++] = _tzname[tim_p->tm_isdst > 0][i];
+ s[count++] = _tzname[tim_p->tm_isdst][i];
else
{
TZ_UNLOCK;
@@ -805,8 +473,7 @@ _DEFUN (strftime, (s, maxsize, format, tim_p),
else
break;
}
- if (maxsize)
- s[count] = '\0';
+ s[count] = '\0';
return count;
}