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476926790a
As the size of long double changes between x86 and AArch64, this results in one of the printf a conversion specifier test-cases getting different output between the two. Note that both outputs (and a few more) are 100% standards-conforming, but the testcase currently only expects a specific one - the one that had been seen on x86 when initially writing the test. This patch fixes the testcase so it accepts either of those two outputs.
303 lines
10 KiB
C
303 lines
10 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 Gabriel Ravier │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/runtime/fenv.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/testlib/testlib.h"
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TEST(snprintf, testVeryLargePrecision) {
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char buf[512] = {};
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int i = snprintf(buf, sizeof(buf), "%.9999u", 10);
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ASSERT_EQ(9999, i);
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ASSERT_EQ(511, strlen(buf));
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}
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TEST(snprintf, testPlusFlagOnChar) {
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char buf[10] = {};
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int i = snprintf(buf, sizeof(buf), "%+c", '=');
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ASSERT_EQ(1, i);
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ASSERT_STREQ("=", buf);
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}
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TEST(snprintf, testInf) {
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char buf[10] = {};
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int i = snprintf(buf, sizeof(buf), "%f", 1.0 / 0.0);
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ASSERT_EQ(3, i);
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ASSERT_STREQ("inf", buf);
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memset(buf, '\0', 4);
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i = snprintf(buf, sizeof(buf), "%Lf", 1.0L / 0.0L);
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ASSERT_EQ(3, i);
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ASSERT_STREQ("inf", buf);
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memset(buf, '\0', 4);
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i = snprintf(buf, sizeof(buf), "%e", 1.0 / 0.0);
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ASSERT_EQ(3, i);
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ASSERT_STREQ("inf", buf);
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memset(buf, '\0', 4);
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i = snprintf(buf, sizeof(buf), "%Le", 1.0L / 0.0L);
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ASSERT_EQ(3, i);
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ASSERT_STREQ("inf", buf);
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memset(buf, '\0', 4);
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i = snprintf(buf, sizeof(buf), "%g", 1.0 / 0.0);
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ASSERT_EQ(3, i);
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ASSERT_STREQ("inf", buf);
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memset(buf, '\0', 4);
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i = snprintf(buf, sizeof(buf), "%Lg", 1.0L / 0.0L);
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ASSERT_EQ(3, i);
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ASSERT_STREQ("inf", buf);
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for (i = 4; i < 10; ++i)
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ASSERT_EQ('\0', buf[i]);
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}
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TEST(snprintf, testUppercaseCConversionSpecifier) {
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char buf[10] = {};
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int i = snprintf(buf, sizeof(buf), "%C", L'a');
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ASSERT_EQ(1, i);
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ASSERT_STREQ("a", buf);
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i = snprintf(buf, sizeof(buf), "%C", L'☺');
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ASSERT_EQ(3, i);
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ASSERT_STREQ("☺", buf);
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}
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// Make sure we don't va_arg the wrong argument size on wide character
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// conversion specifiers
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TEST(snprintf,
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testWideCConversionSpecifierWithLotsOfArgumentsBeforeAndOneAfter) {
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char buf[20] = {};
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int i = snprintf(buf, sizeof(buf), "%d%d%d%d%d%d%d%d%lc%d", 0, 0, 0, 0, 0, 0,
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0, 0, L'x', 1);
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ASSERT_EQ(10, i);
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ASSERT_STREQ("00000000x1", buf);
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memset(buf, 0, sizeof(buf));
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i = snprintf(buf, sizeof(buf), "%d%d%d%d%d%d%d%d%C%d", 0, 0, 0, 0, 0, 0, 0, 0,
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L'x', 1);
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ASSERT_EQ(10, i);
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ASSERT_STREQ("00000000x1", buf);
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}
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static void check_n_buffer_contents(char buf[350]) {
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for (int i = 0; i < 284; ++i)
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ASSERT_EQ(' ', buf[i]);
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ASSERT_STREQ("428463", &buf[284]);
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for (int i = 290; i < 350; ++i)
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ASSERT_EQ('\0', buf[i]);
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}
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TEST(snprintf, testNConversionSpecifier) {
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char buf[350] = {};
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int n_res_int = -1;
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int i = snprintf(buf, sizeof(buf), "%286d%d%n%d", 42, 84, &n_res_int, 63);
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ASSERT_EQ(290, i);
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check_n_buffer_contents(buf);
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ASSERT_EQ(288, n_res_int);
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memset(&buf, '\0', sizeof(buf));
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long n_res_long = -1;
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i = snprintf(buf, sizeof(buf), "%286ld%ld%ln%ld", 42L, 84L, &n_res_long, 63L);
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ASSERT_EQ(290, i);
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check_n_buffer_contents(buf);
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ASSERT_EQ(288, n_res_long);
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memset(&buf, '\0', sizeof(buf));
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long long n_res_long_long = -1;
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i = snprintf(buf, sizeof(buf), "%286lld%lld%lln%lld", 42LL, 84LL,
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&n_res_long_long, 63LL);
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ASSERT_EQ(290, i);
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check_n_buffer_contents(buf);
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ASSERT_EQ(288, n_res_long_long);
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ASSERT_EQ(sizeof(short), 2);
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ASSERT_EQ(sizeof(int), 4);
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memset(&buf, '\0', sizeof(buf));
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short n_res_short = -1;
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i = snprintf(buf, sizeof(buf), "%286hd%hd%hn%hd", (42 | 0xFFFF0000),
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(84 | 0xFFFF0000), &n_res_short, (63 | 0xFFFF0000));
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ASSERT_EQ(290, i);
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check_n_buffer_contents(buf);
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ASSERT_EQ(288, n_res_short);
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ASSERT_EQ(sizeof(unsigned char), 1);
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memset(&buf, '\0', sizeof(buf));
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signed char n_res_char = -1;
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i = snprintf(buf, sizeof(buf), "%286hhd%hhd%hhn%hhd", (42 | 0xFFFFFF00),
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(84 | 0xFFFFFF00), &n_res_char, (63 | 0xFFFFFF00));
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ASSERT_EQ(290, i);
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check_n_buffer_contents(buf);
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ASSERT_EQ((signed char)288, n_res_char);
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memset(&buf, '\0', sizeof(buf));
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ssize_t n_res_size_t = -1;
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i = snprintf(buf, sizeof(buf), "%286zd%zd%zn%zd", (ssize_t)42, (ssize_t)84,
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&n_res_size_t, (ssize_t)63);
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ASSERT_EQ(290, i);
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check_n_buffer_contents(buf);
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ASSERT_EQ(288, n_res_size_t);
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memset(&buf, '\0', sizeof(buf));
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intmax_t n_res_intmax_t = -1;
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i = snprintf(buf, sizeof(buf), "%286jd%jd%jn%jd", (intmax_t)42, (intmax_t)84,
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&n_res_intmax_t, (intmax_t)63);
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ASSERT_EQ(290, i);
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check_n_buffer_contents(buf);
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ASSERT_EQ(288, n_res_intmax_t);
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memset(&buf, '\0', sizeof(buf));
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int128_t n_res_int128_t = -1;
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i = snprintf(buf, sizeof(buf), "%286jjd%jjd%jjn%jjd", (int128_t)42,
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(int128_t)84, &n_res_int128_t, (int128_t)63);
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ASSERT_EQ(290, i);
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check_n_buffer_contents(buf);
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ASSERT_EQ(288, n_res_int128_t);
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memset(&buf, '\0', sizeof(buf));
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ptrdiff_t n_res_ptrdiff_t = -1;
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i = snprintf(buf, sizeof(buf), "%286td%td%tn%td", (ptrdiff_t)42,
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(ptrdiff_t)84, &n_res_ptrdiff_t, (ptrdiff_t)63);
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ASSERT_EQ(290, i);
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check_n_buffer_contents(buf);
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ASSERT_EQ(288, n_res_ptrdiff_t);
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}
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TEST(snprintf, testLongDoubleEConversionSpecifier) {
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char buf[20] = {};
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int i = snprintf(buf, sizeof(buf), "%Le", 1234567.8L);
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ASSERT_EQ(12, i);
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ASSERT_STREQ("1.234568e+06", buf);
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}
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TEST(snprintf, testLongDoubleRounding) {
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int previous_rounding = fegetround();
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ASSERT_EQ(0, fesetround(FE_DOWNWARD));
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char buf[20];
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int i = snprintf(buf, sizeof(buf), "%.3Lf", 4.4375L);
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ASSERT_EQ(5, i);
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ASSERT_STREQ("4.437", buf);
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i = snprintf(buf, sizeof(buf), "%.3Lf", -4.4375L);
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ASSERT_EQ(6, i);
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ASSERT_STREQ("-4.438", buf);
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ASSERT_EQ(0, fesetround(FE_TOWARDZERO));
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i = snprintf(buf, sizeof(buf), "%.3Lf", -4.4375L);
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ASSERT_EQ(6, i);
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ASSERT_STREQ("-4.437", buf);
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ASSERT_EQ(0, fesetround(previous_rounding));
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}
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void check_a_conversion_specifier_double(const char *fmt,
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const char *expected_str,
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double value) {
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char buf[30] = {0};
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int i = snprintf(buf, sizeof(buf), fmt, value);
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ASSERT_EQ(strlen(expected_str), i);
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ASSERT_STREQ(expected_str, buf);
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}
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void check_a_conversion_specifier_long_double(const char *fmt,
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const char *expected_str,
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long double value) {
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char buf[30] = {0};
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int i = snprintf(buf, sizeof(buf), fmt, value);
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ASSERT_EQ(strlen(expected_str), i);
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ASSERT_STREQ(expected_str, buf);
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}
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void check_a_conversion_specifier_long_double_arr_allowed(
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const char *fmt, const char *allowed_strs[], long double value) {
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char buf[30] = {0};
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int res = snprintf(buf, sizeof(buf), fmt, value);
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for (size_t i = 0; allowed_strs[i] != NULL; ++i)
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if (strlen(allowed_strs[i]) == res && strcmp(allowed_strs[i], buf) == 0)
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return;
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printf("Failed to find matching str for %`'s, allowed strs:\n", buf);
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for (size_t i = 0; allowed_strs[i] != NULL; ++i)
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printf("- %`'s\n", allowed_strs[i]);
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fflush(stdout);
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ASSERT_EQ(false, true);
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}
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void check_a_conversion_specifier_double_prec_1(const char *expected_str,
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double value) {
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check_a_conversion_specifier_double("%.1a", expected_str, value);
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}
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TEST(snprintf, testAConversionSpecifierRounding) {
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int previous_rounding = fegetround();
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ASSERT_EQ(0, fesetround(FE_DOWNWARD));
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check_a_conversion_specifier_double_prec_1("0x1.fp+4", 0x1.fffffp+4);
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ASSERT_EQ(0, fesetround(FE_UPWARD));
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check_a_conversion_specifier_double_prec_1("0x2.0p+4", 0x1.f8p+4);
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ASSERT_EQ(0, fesetround(previous_rounding));
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}
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// This test specifically checks that we round to even, accordingly to IEEE
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// rules
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TEST(snprintf, testAConversionSpecifier) {
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check_a_conversion_specifier_double_prec_1("0x1.8p+4", 0x1.7800000000001p+4);
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check_a_conversion_specifier_double_prec_1("0x1.8p+4", 0x1.78p+4);
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check_a_conversion_specifier_double_prec_1("0x1.8p+4", 0x1.88p+4);
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check_a_conversion_specifier_double_prec_1("0x1.6p+4", 0x1.58p+4);
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check_a_conversion_specifier_double_prec_1("0x1.6p+4", 0x1.68p+4);
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check_a_conversion_specifier_double_prec_1("0x1.ap+4", 0x1.98p+4);
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check_a_conversion_specifier_double_prec_1("0x1.ap+4", 0x1.a8p+4);
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check_a_conversion_specifier_double("%#a", "0x0.p+0", 0x0.0p0);
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check_a_conversion_specifier_double("%#A", "0X0.P+0", 0x0.0p0);
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check_a_conversion_specifier_long_double("%#La", "0x0.p+0", 0x0.0p0L);
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check_a_conversion_specifier_long_double("%#LA", "0X0.P+0", 0x0.0p0L);
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check_a_conversion_specifier_double("%.2a", "0x1.00p-1026", 0xf.fffp-1030);
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check_a_conversion_specifier_double("%.1a", "0x2.0p+0", 1.999);
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const char *acceptable_results1[] = {"0x1.0p+1", "0x2.0p+0", NULL};
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check_a_conversion_specifier_long_double_arr_allowed(
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"%.1La", acceptable_results1, 1.999L);
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}
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TEST(snprintf, apostropheFlag) {
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char buf[20];
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int i = snprintf(buf, sizeof(buf), "%'d", 1000000);
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ASSERT_EQ(7, i);
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ASSERT_STREQ("1000000", buf);
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}
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