/* $NetBSD: t_printf.c,v 1.20 2026/04/10 20:36:21 rillig Exp $ */

/*-
 * Copyright (c) 2010 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/resource.h>

#include <atf-c.h>
#include <errno.h>
#include <float.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

ATF_TC(snprintf_c99);
ATF_TC_HEAD(snprintf_c99, tc)
{

        atf_tc_set_md_var(tc, "descr",
            "Test printf(3) C99 conformance (PR lib/22019)");
}

ATF_TC_BODY(snprintf_c99, tc)
{
        char s[4];

        (void)memset(s, '\0', sizeof(s));
        (void)snprintf(s, sizeof(s), "%#.o", 0);
        (void)printf("printf = %#.o\n", 0);
        (void)fprintf(stderr, "snprintf = %s", s);

        ATF_REQUIRE(strlen(s) == 1);
        ATF_REQUIRE(s[0] == '0');
}

ATF_TC(snprintf_dotzero);
ATF_TC_HEAD(snprintf_dotzero, tc)
{

        atf_tc_set_md_var(tc, "descr",
            "PR lib/32951: %%.0f formats (0.0,0.5] to \"0.\"");
}

ATF_TC_BODY(snprintf_dotzero, tc)
{
        char s[4];

        ATF_CHECK(snprintf(s, sizeof(s), "%.0f", 0.1) == 1);
        ATF_REQUIRE_STREQ(s, "0");
}

ATF_TC(snprintf_posarg);
ATF_TC_HEAD(snprintf_posarg, tc)
{

        atf_tc_set_md_var(tc, "descr", "test for positional arguments");
}

ATF_TC_BODY(snprintf_posarg, tc)
{
        char s[16];

        ATF_CHECK(snprintf(s, sizeof(s), "%1$d", -23) == 3);
        ATF_REQUIRE_STREQ(s, "-23");
}

ATF_TC(snprintf_posarg_width);
ATF_TC_HEAD(snprintf_posarg_width, tc)
{

        atf_tc_set_md_var(tc, "descr", "test for positional arguments with "
            "field width");
}

ATF_TC_BODY(snprintf_posarg_width, tc)
{
        char s[16];

        ATF_CHECK(snprintf(s, sizeof(s), "%1$*2$d", -23, 4) == 4);
        ATF_REQUIRE_STREQ(s, " -23");
}

ATF_TC(snprintf_posarg_error);
ATF_TC_HEAD(snprintf_posarg_error, tc)
{

        atf_tc_set_md_var(tc, "descr", "test for positional arguments out "
            "of bounds");
}

ATF_TC_BODY(snprintf_posarg_error, tc)
{
        char s[16], fmt[32];

        snprintf(fmt, sizeof(fmt), "%%%zu$d", SIZE_MAX / sizeof(size_t));

        ATF_CHECK(snprintf(s, sizeof(s), fmt, -23) == -1);
}

ATF_TC(snprintf_float);
ATF_TC_HEAD(snprintf_float, tc)
{

        atf_tc_set_md_var(tc, "descr", "test that floating conversions don't"
            " leak memory");
}

ATF_TC_BODY(snprintf_float, tc)
{
        union {
                double d;
                uint64_t bits;
        } u;
        uint32_t ul, uh;
        time_t now;
        char buf[1000];
        struct rlimit rl;

        rl.rlim_cur = rl.rlim_max = 1 * 1024 * 1024;
        ATF_CHECK(setrlimit(RLIMIT_AS, &rl) != -1);
        rl.rlim_cur = rl.rlim_max = 1 * 1024 * 1024;
        ATF_CHECK(setrlimit(RLIMIT_DATA, &rl) != -1);

        time(&now);
        srand(now);
        printf("seed %u\n", (unsigned)now);
        for (size_t i = 0; i < 10000; i++) {
                ul = rand();
                uh = rand();
                u.bits = (uint64_t)uh << 32 | ul;
                ATF_CHECK(snprintf(buf, sizeof buf, " %.2f", u.d) != -1);
        }
}

ATF_TC(sprintf_zeropad);
ATF_TC_HEAD(sprintf_zeropad, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Test output format zero padding (PR lib/44113)");
}

ATF_TC_BODY(sprintf_zeropad, tc)
{
        char str[1024];

        ATF_CHECK(sprintf(str, "%010f", 0.0) == 10);
        ATF_REQUIRE_STREQ(str, "000.000000");

        /* ieeefp */
#ifndef __vax__
        /* printf(3) should ignore zero padding for nan/inf */
        ATF_CHECK(sprintf(str, "%010f", NAN) == 10);
        ATF_REQUIRE_STREQ(str, "       nan");
        ATF_CHECK(sprintf(str, "%010f", INFINITY) == 10);
        ATF_REQUIRE_STREQ(str, "       inf");
#endif
}

ATF_TC(snprintf_double_a);
ATF_TC_HEAD(snprintf_double_a, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test printf a format");
}

ATF_TC_BODY(snprintf_double_a, tc)
{
        char buf[1000];

        snprintf(buf, sizeof buf, "%.3a", (double)10.6);
        ATF_CHECK_MSG((strcmp(buf, "0x1.533p+3") == 0 ||
                strcmp(buf, "0x2.a66p+2") == 0 ||
                strcmp(buf, "0x5.4cdp+1") == 0 ||
                strcmp(buf, "0xa.99ap+0") == 0),
            "buf=%s", buf);

        snprintf(buf, sizeof buf, "%a", (double)0.125);
        ATF_CHECK_MSG((strcmp(buf, "0x1p-3") == 0 ||
                strcmp(buf, "0x2p-4") == 0 ||
                strcmp(buf, "0x4p-5") == 0 ||
                strcmp(buf, "0x8p-6") == 0),
            "buf=%s", buf);
}

ATF_TC(snprintf_long_double_a);
ATF_TC_HEAD(snprintf_long_double_a, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test printf La format");
}

ATF_TC_BODY(snprintf_long_double_a, tc)
{
        char buf[1000];

        snprintf(buf, sizeof buf, "%.3La", 10.6L);
        ATF_CHECK_MSG((strcmp(buf, "0x1.533p+3") == 0 ||
                strcmp(buf, "0x2.a66p+2") == 0 ||
                strcmp(buf, "0x5.4cdp+1") == 0 ||
                strcmp(buf, "0xa.99ap+0") == 0),
            "buf=%s", buf);

        snprintf(buf, sizeof buf, "%La", 0.125L);
        ATF_CHECK_MSG((strcmp(buf, "0x1p-3") == 0 ||
                strcmp(buf, "0x2p-4") == 0 ||
                strcmp(buf, "0x4p-5") == 0 ||
                strcmp(buf, "0x8p-6") == 0),
            "buf=%s", buf);

        /*
         * Test case adapted from:
         *
         * https://mail-index.netbsd.org/tech-userlevel/2020/04/11/msg012329.html
         */
#if LDBL_MAX_EXP >= 16384 && LDBL_MANT_DIG >= 64
        snprintf(buf, sizeof buf, "%La", -0xc.ecececececececep+3788L);
        ATF_CHECK_MSG((strcmp(buf, "-0x1.9d9d9d9d9d9d9d9cp+3791") == 0 ||
                strcmp(buf, "-0x3.3b3b3b3b3b3b3b38p+3790") == 0 ||
                strcmp(buf, "-0x6.7676767676767674p+3789") == 0 ||
                strcmp(buf, "-0xc.ecececececececep+3788") == 0),
            "buf=%s", buf);
#endif

#if LDBL_MAX_EXP >= 16384 && LDBL_MANT_DIG >= 113
        snprintf(buf, sizeof buf, "%La",
            -0x1.cecececececececececececececep+3791L);
        ATF_CHECK_MSG((strcmp(buf,
                    "-0x1.cecececececececececececececep+3791") == 0 ||
                strcmp(buf, "-0x3.3333333333333338p+3790") == 0 ||
                strcmp(buf, "-0x6.767676767676767p+3789") == 0 ||
                strcmp(buf, "-0xc.ecececececececep+3788") == 0),
            "buf=%s", buf);
#endif
}

/* is "long double" and "double" different? */
#if (__LDBL_MANT_DIG__ != __DBL_MANT_DIG__) || \
    (__LDBL_MAX_EXP__ != __DBL_MAX_EXP__)
#define WIDE_DOUBLE
#endif

#ifndef WIDE_DOUBLE
ATF_TC(pr57250_fix);
ATF_TC_HEAD(pr57250_fix, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test for PR 57250: dtoa mishandles infinite doubles on 32bit big endian machines");
}

ATF_TC_BODY(pr57250_fix, tc)
{
        char *eptr;
        char buf[1000];
        long double ld;

        errno = 0;
        ld = strtold("1e309", &eptr);
        ATF_CHECK(errno != 0);
        ld = (double)ld;
        ATF_CHECK(isfinite(ld) == 0);
        snprintf(buf, sizeof buf, "%Lf\n", ld);
#ifndef __vax__
        ATF_REQUIRE_STREQ(buf, "inf\n");
#endif
}
#endif


ATF_TP_ADD_TCS(tp)
{

        ATF_TP_ADD_TC(tp, snprintf_c99);
        ATF_TP_ADD_TC(tp, snprintf_dotzero);
        ATF_TP_ADD_TC(tp, snprintf_posarg);
        ATF_TP_ADD_TC(tp, snprintf_posarg_width);
        ATF_TP_ADD_TC(tp, snprintf_posarg_error);
        ATF_TP_ADD_TC(tp, snprintf_float);
        ATF_TP_ADD_TC(tp, sprintf_zeropad);
        ATF_TP_ADD_TC(tp, snprintf_double_a);
        ATF_TP_ADD_TC(tp, snprintf_long_double_a);
#ifndef WIDE_DOUBLE
        ATF_TP_ADD_TC(tp, pr57250_fix);
#endif

        return atf_no_error();
}