diff options
Diffstat (limited to 'lib/libutil/t_strpct.c')
| -rw-r--r-- | lib/libutil/t_strpct.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/lib/libutil/t_strpct.c b/lib/libutil/t_strpct.c new file mode 100644 index 000000000000..c061ae152321 --- /dev/null +++ b/lib/libutil/t_strpct.c @@ -0,0 +1,202 @@ +/* $NetBSD: t_strpct.c,v 1.2 2025/05/03 07:22:52 rillig Exp $ */ + +/* + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code was contributed to The NetBSD Foundation by Roland Illig. + * + * 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/cdefs.h> +__COPYRIGHT("@(#) Copyright (c) 2025\ + The NetBSD Foundation, inc. All rights reserved."); +__RCSID("$NetBSD: t_strpct.c,v 1.2 2025/05/03 07:22:52 rillig Exp $"); + +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <string.h> +#include <util.h> + +#include <atf-c.h> + +static void +check_strspct(const char *file, unsigned line, + size_t bufsiz, intmax_t num, intmax_t den, size_t digits, + const char *want) +{ + char buf[128]; + + ATF_REQUIRE_MSG(bufsiz < sizeof(buf) - 2, "bufsiz too large"); + memset(buf, '>', sizeof(buf)); + buf[0] = '<'; + buf[sizeof(buf) - 1] = '\0'; + + const char *have = strspct(buf + 1, bufsiz, num, den, digits); + + ATF_REQUIRE_MSG(buf[0] == '<', + "out-of-bounds write before"); + ATF_REQUIRE_MSG(buf[1 + bufsiz] == '>', + "out-of-bounds write after"); + ATF_REQUIRE_MSG(have == buf + 1, + "have != buf"); + ATF_CHECK_MSG(bufsiz > 0 ? strcmp(have, want) == 0 : true, + "%s:%u: want \"%s\", have \"%s\"", + file, line, want, have); +} + +#define h_strspct(bufsiz, num, den, digits, want) \ + check_strspct(__FILE__, __LINE__, bufsiz, num, den, digits, want) + +static void +check_strpct(const char *file, unsigned line, + size_t bufsiz, uintmax_t num, uintmax_t den, size_t digits, + const char *want) +{ + char buf[128]; + + ATF_REQUIRE_MSG(bufsiz < sizeof(buf) - 2, "bufsiz too large"); + memset(buf, '>', sizeof(buf)); + buf[0] = '<'; + buf[sizeof(buf) - 1] = '\0'; + + const char *have = strpct(buf + 1, bufsiz, num, den, digits); + + ATF_REQUIRE_MSG(buf[0] == '<', + "out-of-bounds write before"); + ATF_REQUIRE_MSG(buf[1 + bufsiz] == '>', + "out-of-bounds write after"); + ATF_REQUIRE_MSG(have == buf + 1, + "have != buf"); + ATF_CHECK_MSG(bufsiz > 0 ? strcmp(have, want) == 0 : true, + "%s:%u: want \"%s\", have \"%s\"", + file, line, want, have); +} + +#define h_strpct(bufsiz, num, den, digits, want) \ + check_strpct(__FILE__, __LINE__, bufsiz, num, den, digits, want) + +ATF_TC(strspct); +ATF_TC_HEAD(strspct, tc) +{ + atf_tc_set_md_var(tc, "descr", "Checks strspct(3)"); +} +ATF_TC_BODY(strspct, tc) +{ + + // Very small buffers. + h_strspct(0, 0, 0, 0, ""); + h_strspct(1, 0, 0, 0, ""); + + // Small buffers. + h_strspct(2, 1, 40, 0, "2"); + h_strspct(3, 1, 40, 0, "2"); + h_strspct(3, 1, 40, 1, "2."); + h_strspct(4, 1, 40, 1, "2.5"); + h_strspct(4, 8, 40, 1, "20."); + h_strspct(6, 1, 5, 1, "20.0"); + h_strspct(100, 1, 5, 5, "20.00000"); + h_strspct( 5, 11223344, 100, 10, "1122"); + h_strspct(10, 11223344, 100, 10, "11223344."); + h_strspct(11, 11223344, 100, 10, "11223344.0"); + + // Small buffers with negative numbers. + h_strspct(1, -1, 40, 0, ""); + h_strspct(2, -1, 40, 0, "-"); + h_strspct(3, -1, 40, 0, "-2"); + h_strspct(3, -1, 40, 1, "-2"); + h_strspct(4, -1, 40, 1, "-2."); + h_strspct(5, -1, 40, 1, "-2.5"); + h_strspct(4, -8, 40, 1, "-20"); + h_strspct(5, -8, 40, 1, "-20."); + h_strspct(6, -1, 5, 1, "-20.0"); + h_strspct(100, -1, 5, 5, "-20.00000"); + h_strspct( 5, -11223344, 100, 10, "-112"); + h_strspct(10, -11223344, 100, 10, "-11223344"); + h_strspct(11, -11223344, 100, 10, "-11223344."); + h_strspct(12, -11223344, 100, 10, "-11223344.0"); + + // Percentages are always rounded towards zero. + h_strspct(6, 1, 6, 1, "16.6"); + h_strspct(7, -1, 6, 1, "-16.6"); + h_strspct(7, 1, -6, 1, "-16.6"); + h_strspct(7, -1, -6, 1, "16.6"); + h_strspct(100, 1, 7, 20, "14.28571428571428571428"); + + // Big numbers. + h_strspct(100, INTMAX_MAX, INTMAX_MAX, 0, "100"); + h_strspct(100, INTMAX_MIN, INTMAX_MIN, 25, "100.0000000000000000000000000"); + h_strspct(100, INTMAX_MIN, INTMAX_MAX, 25, "-100.0000000000000000108420217"); + h_strspct(100, INTMAX_MAX, INTMAX_MIN, 25, "-99.9999999999999999891579782"); + h_strspct(100, INTMAX_MAX, INTMAX_MAX, 25, "100.0000000000000000000000000"); +} + +ATF_TC(strpct); +ATF_TC_HEAD(strpct, tc) +{ + atf_tc_set_md_var(tc, "descr", "Checks strpct(3)"); +} +ATF_TC_BODY(strpct, tc) +{ + + // Small buffers. + h_strpct(0, 0, 0, 0, ""); + h_strpct(1, 0, 0, 0, ""); + h_strpct(2, 0, 0, 0, "0"); + h_strpct(3, 0, 0, 0, "0"); + h_strpct(3, 0, 0, 1, "0."); + h_strpct(4, 0, 0, 1, "0.0"); + h_strpct(4, 1, 5, 1, "20."); + h_strpct(6, 1, 5, 1, "20.0"); + h_strpct(100, 1, 5, 5, "20.00000"); + + h_strpct(100, 1, 7, 20, "14.28571428571428571428"); + + h_strpct( 5, 11223344, 100, 10, "1122"); + h_strpct(10, 11223344, 100, 10, "11223344."); + h_strpct(11, 11223344, 100, 10, "11223344.0"); + + h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 0, "100"); + h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 1, "100.0"); + h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 5, "100.00000"); + h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 10, "100.0000000000"); + h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 15, "100.000000000000000"); + h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 20, "100.00000000000000000000"); + h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 25, "100.0000000000000000000000000"); + + h_strpct(100, UINTMAX_MAX - 1, UINTMAX_MAX, 25, "99.9999999999999999945789891"); + h_strpct(100, 1, (UINTMAX_MAX >> 1) + 1, 70, + "0.0000000000000000108420217248550443400745280086994171142578125000000000"); + h_strpct(100, UINTMAX_MAX, 1, 10, "1844674407370955161500.0000000000"); + h_strpct(100, 1, UINTMAX_MAX, 30, "0.000000000000000005421010862427"); +} + +ATF_TP_ADD_TCS(tp) +{ + + ATF_TP_ADD_TC(tp, strspct); + ATF_TP_ADD_TC(tp, strpct); + + return atf_no_error(); +} |