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/*
* fhist - file history and comparison tools
* Copyright (C) 1998, 2002 Peter Miller;
* All rights reserved.
*
* 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 of the License, 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.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate dates
*/
#include <ac/time.h>
#include <language.h>
#include <str.h>
#include <sub/date.h>
#include <sub/private.h>
#include <trace.h>
#include <wstr_list.h>
/*
* NAME
* sub_date - the date substitution
*
* SYNOPSIS
* wstring_ty *sub_date(wstring_list_ty *arg);
*
* DESCRIPTION
* The sub_date function implements the date substitution.
* The date substitution is replaced by the current date.
* The optional arguments may construct format string,
* similar to the date(1) command.
*
* ARGUMENTS
* arg - list of arguments, including the function name as [0]
*
* RETURNS
* a pointer to a string in dynamic memory;
* or NULL on error, setting suberr appropriately.
*/
wstring_ty *
sub_date(sub_context_ty *scp, wstring_list_ty *arg)
{
wstring_ty *result;
time_t now;
trace(("sub_date()\n{\n"));
time(&now);
if (arg->nitems < 2)
{
char *time_string;
time_string = ctime(&now);
result = wstr_n_from_c(time_string, 24);
}
else
{
struct tm *tm;
char buf[1000];
size_t nbytes;
wstring_ty *wfmt;
string_ty *fmt;
wfmt = wstring_list_to_wstring(arg, 1, 32767, (char *)0);
fmt = wstr_to_str(wfmt);
wstr_free(wfmt);
tm = localtime(&now);
/*
* The strftime is locale dependent.
*/
language_human();
nbytes = strftime(buf, sizeof(buf) - 1, fmt->str_text, tm);
language_C();
if (!nbytes && fmt->str_length)
{
sub_context_error_set(scp, i18n("strftime output too large"));
result = 0;
}
else
result = wstr_n_from_c(buf, nbytes);
str_free(fmt);
}
trace(("return %8.8lX;\n", (long)result));
trace(("}\n"));
return result;
}
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