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Add asctime{,_r}(3).

This commit is contained in:
Jonas 'Sortie' Termansen 2013-03-22 01:09:03 +01:00
parent 440e34ef62
commit 7ef559e2e1
3 changed files with 110 additions and 0 deletions
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2
libc/Makefile
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@ -120,6 +120,8 @@ strstr.o \
strtok.o \
strtok_r.o \
strxfrm.o \
time/asctime.o \
time/asctime_r.o \
timespec.o \
time/strftime.o \
ungetc.o \

36
libc/time/asctime.cpp Normal file
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@ -0,0 +1,36 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
time/asctime.cpp
Convert date and time to a string.
*******************************************************************************/
#include <assert.h>
#include <time.h>
#include <stdio.h>
// TODO: Oh god. This function is horrible! It's obsolescent in POSIX - but it's
// still widely used and I need it at the moment to port software. Please
// do remove this function when all the calls to it has been purged.
extern "C" char* asctime(const struct tm* tm)
{
static char buf[26];
return asctime_r(tm, buf);
}

72
libc/time/asctime_r.cpp Normal file
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@ -0,0 +1,72 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
time/asctime_r.cpp
Convert date and time to a string.
*******************************************************************************/
#include <assert.h>
#include <time.h>
#include <stdio.h>
// TODO: Oh god. This function is horrible! It's obsolescent in POSIX - but it's
// still widely used and I need it at the moment to port software. Please
// do remove this function when all the calls to it has been purged.
extern "C" char* asctime_r(const struct tm* tm, char* buf)
{
static char wday_names[7][4] =
{
"Sun",
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat"
};
static char mon_names[12][4] =
{
"Jan",
"Feb",
"Mar",
"Apr",
"May",
"Jun",
"Jul",
"Aug",
"Sep",
"Oct",
"Nov",
"Dec",
};
// TODO: This is not exactly the same as in POSIX because printf currently
// doesn't support precision ('.'), only field width.
int bytes = sprintf(buf, "%s %s%3d %02d:%02d%02d %d\n",
wday_names[tm->tm_wday],
mon_names[tm->tm_mon],
tm->tm_mday,
tm->tm_hour,
tm->tm_min,
tm->tm_sec,
tm->tm_year + 1900);
assert(bytes+1 <= 26);
return buf;
}