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/* Verify the behavior of strftime on alternative representation for
year.
Copyright (C) 2019-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU 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 2.1 of the License, or (at your option) any later version.
The GNU 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 GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <stdbool.h>
#include <support/check.h>
#include <stdlib.h>
#include <locale.h>
#include <time.h>
#include <stdio.h>
#include <string.h>
static const char *locales[] =
{
"ja_JP.UTF-8", "lo_LA.UTF-8", "th_TH.UTF-8",
"zh_TW.UTF-8", "cmn_TW.UTF-8", "hak_TW.UTF-8",
"nan_TW.UTF-8", "lzh_TW.UTF-8"
};
/* Must match locale index into locales array. */
enum
{
ja_JP, lo_LA, th_TH,
zh_TW, cmn_TW, hak_TW, nan_TW, lzh_TW
};
static const char *formats[] = { "%EY", "%_EY", "%-EY" };
typedef struct
{
const int d, m, y;
} date_t;
static const date_t dates[] =
{
{ 1, 4, 1910 },
{ 31, 12, 1911 },
{ 1, 1, 1912 },
{ 1, 4, 1913 },
{ 1, 4, 1988 },
{ 7, 1, 1989 },
{ 8, 1, 1989 },
{ 1, 4, 1990 },
{ 1, 4, 1997 },
{ 1, 4, 1998 },
{ 1, 4, 2010 },
{ 1, 4, 2011 },
{ 30, 4, 2019 },
{ 1, 5, 2019 }
};
static char ref[array_length (locales)][array_length (formats)]
[array_length (dates)][100];
static bool
is_before (const int i, const int d, const int m, const int y)
{
if (dates[i].y < y)
return true;
else if (dates[i].y > y)
return false;
else if (dates[i].m < m)
return true;
else if (dates[i].m > m)
return false;
else
return dates[i].d < d;
}
static void
mkreftable (void)
{
int i, j, k, yr;
const char *era, *sfx;
/* Japanese era year to be checked. */
static const int yrj[] =
{
43, 44, 45, 2,
63, 64, 1, 2, 9, 10, 22, 23, 31, 1
};
/* Buddhist calendar year to be checked. */
static const int yrb[] =
{
2453, 2454, 2455, 2456,
2531, 2532, 2532, 2533, 2540, 2541, 2553, 2554, 2562, 2562
};
/* R.O.C. calendar year to be checked. Negative number is prior to
Minguo counting up. */
static const int yrc[] =
{
-2, -1, 1, 2,
77, 78, 78, 79, 86, 87, 99, 100, 108, 108
};
for (i = 0; i < array_length (locales); i++)
for (j = 0; j < array_length (formats); j++)
for (k = 0; k < array_length (dates); k++)
{
if (i == ja_JP)
{
era = (is_before (k, 30, 7, 1912)) ? "\u660e\u6cbb"
: (is_before (k, 25, 12, 1926)) ? "\u5927\u6b63"
: (is_before (k, 8, 1, 1989)) ? "\u662d\u548c"
: (is_before (k, 1, 5, 2019)) ? "\u5e73\u6210"
: "\u4ee4\u548c";
yr = yrj[k], sfx = "\u5e74";
}
else if (i == lo_LA)
era = "\u0e9e.\u0eaa. ", yr = yrb[k], sfx = "";
else if (i == th_TH)
era = "\u0e1e.\u0e28. ", yr = yrb[k], sfx = "";
else if (i == zh_TW || i == cmn_TW || i == hak_TW
|| i == nan_TW || i == lzh_TW)
{
era = (is_before (k, 1, 1, 1912)) ? "\u6c11\u524d"
: "\u6c11\u570b";
yr = yrc[k], sfx = "\u5e74";
}
else
FAIL_EXIT1 ("Invalid table index!");
if (yr == 1)
sprintf (ref[i][j][k], "%s\u5143%s", era, sfx);
else if (j == 0)
sprintf (ref[i][j][k], "%s%02d%s", era, abs (yr), sfx);
else if (j == 1)
sprintf (ref[i][j][k], "%s%2d%s", era, abs (yr), sfx);
else if (j == 2)
sprintf (ref[i][j][k], "%s%d%s", era, abs (yr), sfx);
else
FAIL_EXIT1 ("Invalid table index!");
}
}
static int
do_test (void)
{
int i, j, k, result = 0;
struct tm ttm;
char date[11], buf[100];
size_t r, e;
mkreftable ();
for (i = 0; i < array_length (locales); i++)
{
if (setlocale (LC_ALL, locales[i]) == NULL)
{
printf ("locale %s does not exist, skipping...\n", locales[i]);
continue;
}
printf ("[%s]\n", locales[i]);
for (j = 0; j < array_length (formats); j++)
{
for (k = 0; k < array_length (dates); k++)
{
ttm.tm_mday = dates[k].d;
ttm.tm_mon = dates[k].m - 1;
ttm.tm_year = dates[k].y - 1900;
strftime (date, sizeof (date), "%F", &ttm);
r = strftime (buf, sizeof (buf), formats[j], &ttm);
e = strlen (ref[i][j][k]);
printf ("%s\t\"%s\"\t\"%s\"", date, formats[j], buf);
if (strcmp (buf, ref[i][j][k]) != 0)
{
printf ("\tshould be \"%s\"", ref[i][j][k]);
if (r != e)
printf ("\tgot: %zu, expected: %zu", r, e);
result = 1;
}
else
printf ("\tOK");
putchar ('\n');
}
putchar ('\n');
}
}
return result;
}
#include <support/test-driver.c>
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