4 * The canonical version of this file is maintained in the rra-c-util package,
5 * which can be found at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
7 * Written by Russ Allbery <eagle@eyrie.org>
8 * Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006
9 * Russ Allbery <eagle@eyrie.org>
10 * Copyright 2009, 2010
11 * The Board of Trustees of the Leland Stanford Junior University
12 * Copyright 1995 Patrick Powell
13 * Copyright 2001 Hrvoje Niksic
15 * This code is based on code written by Patrick Powell (papowell@astart.com)
16 * It may be used for any purpose as long as this notice remains intact
17 * on all source code distributions
21 #include <portable/system.h>
23 #include <tests/tap/basic.h>
26 * Disable the requirement that format strings be literals. We need variable
27 * formats for easy testing.
29 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
32 * Intentionally don't add the printf attribute here since we pass a
33 * zero-length printf format during testing and don't want warnings.
35 int test_snprintf(char *str, size_t count, const char *fmt, ...);
36 int test_vsnprintf(char *str, size_t count, const char *fmt, va_list args);
38 static const char string[] = "abcdefghijklmnopqrstuvwxyz0123456789";
40 static const char *const fp_formats[] = {
41 "%-1.5f", "%1.5f", "%31.9f", "%10.5f", "% 10.5f", "%+22.9f",
42 "%+4.9f", "%01.3f", "%3.1f", "%3.2f", "%.0f", "%.1f",
45 /* %e and %g formats aren't really implemented yet. */
47 "%-1.5e", "%1.5e", "%31.9e", "%10.5e", "% 10.5e", "%+22.9e",
48 "%+4.9e", "%01.3e", "%3.1e", "%3.2e", "%.0e", "%.1e",
50 "%-1.5g", "%1.5g", "%31.9g", "%10.5g", "% 10.5g", "%+22.9g",
51 "%+4.9g", "%01.3g", "%3.1g", "%3.2g", "%.0g", "%.1g",
56 static const char *const int_formats[] = {
57 "%-1.5d", "%1.5d", "%31.9d", "%5.5d", "%10.5d", "% 10.5d",
58 "%+22.30d", "%01.3d", "%4d", "%d", "%ld", NULL
60 static const char *const uint_formats[] = {
61 "%-1.5lu", "%1.5lu", "%31.9lu", "%5.5lu", "%10.5lu", "% 10.5lu",
62 "%+6.30lu", "%01.3lu", "%4lu", "%lu", "%4lx", "%4lX",
63 "%01.3lx", "%1lo", NULL
65 static const char *const llong_formats[] = {
66 "%lld", "%-1.5lld", "%1.5lld", "%123.9lld", "%5.5lld",
67 "%10.5lld", "% 10.5lld", "%+22.33lld", "%01.3lld", "%4lld",
70 static const char *const ullong_formats[] = {
71 "%llu", "%-1.5llu", "%1.5llu", "%123.9llu", "%5.5llu",
72 "%10.5llu", "% 10.5llu", "%+22.33llu", "%01.3llu", "%4llu",
76 static const double fp_nums[] = {
77 -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996, 0.9996, 1.996,
78 4.136, 0.1, 0.01, 0.001, 10.1, 0
80 static long int_nums[] = {
81 -1, 134, 91340, 341, 0203, 0
83 static unsigned long uint_nums[] = {
84 (unsigned long) -1, 134, 91340, 341, 0203, 0
86 static long long llong_nums[] = {
87 ~(long long) 0, /* All-1 bit pattern. */
88 (~(unsigned long long) 0) >> 1, /* Largest signed long long. */
89 -150, 134, 91340, 341,
92 static unsigned long long ullong_nums[] = {
93 ~(unsigned long long) 0, /* All-1 bit pattern. */
94 (~(unsigned long long) 0) >> 1, /* Largest signed long long. */
101 test_format(bool trunc, const char *expected, int count,
102 const char *format, ...)
108 va_start(args, format);
109 result = test_vsnprintf(buf, trunc ? 32 : sizeof(buf), format, args);
111 is_string(expected, buf, "format %s, wanted %s", format, expected);
112 is_int(count, result, "...and output length correct");
125 (18 + (ARRAY_SIZE(fp_formats) - 1) * ARRAY_SIZE(fp_nums)
126 + (ARRAY_SIZE(int_formats) - 1) * ARRAY_SIZE(int_nums)
127 + (ARRAY_SIZE(uint_formats) - 1) * ARRAY_SIZE(uint_nums)
128 + (ARRAY_SIZE(llong_formats) - 1) * ARRAY_SIZE(llong_nums)
129 + (ARRAY_SIZE(ullong_formats) - 1) * ARRAY_SIZE(ullong_nums)) * 2);
131 is_int(4, test_snprintf(NULL, 0, "%s", "abcd"), "simple string length");
132 is_int(2, test_snprintf(NULL, 0, "%d", 20), "number length");
133 is_int(7, test_snprintf(NULL, 0, "Test %.2s", "abcd"), "limited string");
134 is_int(1, test_snprintf(NULL, 0, "%c", 'a'), "character length");
135 is_int(0, test_snprintf(NULL, 0, ""), "empty format length");
137 test_format(true, "abcd", 4, "%s", "abcd");
138 test_format(true, "20", 2, "%d", 20);
139 test_format(true, "Test ab", 7, "Test %.2s", "abcd");
140 test_format(true, "a", 1, "%c", 'a');
141 test_format(true, "", 0, "");
142 test_format(true, "abcdefghijklmnopqrstuvwxyz01234", 36, "%s", string);
143 test_format(true, "abcdefghij", 10, "%.10s", string);
144 test_format(true, " abcdefghij", 12, "%12.10s", string);
145 test_format(true, " abcdefghijklmnopqrstuvwxyz0", 40, "%40s", string);
146 test_format(true, "abcdefghij ", 14, "%-14.10s", string);
147 test_format(true, " abcdefghijklmnopq", 50, "%50s", string);
148 test_format(true, "%abcd%", 6, "%%%0s%%", "abcd");
149 test_format(true, "", 0, "%.0s", string);
150 test_format(true, "abcdefghijklmnopqrstuvwxyz 444", 32, "%.26s %d",
152 test_format(true, "abcdefghijklmnopqrstuvwxyz -2.", 32, "%.26s %.1f",
154 test_format(true, "abcdefghij4444", 14, "%.10s%n%d", string, &count, 4444);
155 is_int(10, count, "correct output from %%n");
156 test_format(true, "abcdefghijklmnopqrstuvwxyz01234", 36, "%n%s%ln",
157 &count, string, &lcount);
158 is_int(0, count, "correct output from two %%n");
159 is_int(31, lcount, "correct output from long %%ln");
160 test_format(true, "(null)", 6, "%s", NULL);
162 for (i = 0; fp_formats[i] != NULL; i++)
163 for (j = 0; j < ARRAY_SIZE(fp_nums); j++) {
164 count = sprintf(lgbuf, fp_formats[i], fp_nums[j]);
165 test_format(false, lgbuf, count, fp_formats[i], fp_nums[j]);
167 for (i = 0; int_formats[i] != NULL; i++)
168 for (j = 0; j < ARRAY_SIZE(int_nums); j++) {
169 count = sprintf(lgbuf, int_formats[i], int_nums[j]);
170 test_format(false, lgbuf, count, int_formats[i], int_nums[j]);
172 for (i = 0; uint_formats[i] != NULL; i++)
173 for (j = 0; j < ARRAY_SIZE(uint_nums); j++) {
174 count = sprintf(lgbuf, uint_formats[i], uint_nums[j]);
175 test_format(false, lgbuf, count, uint_formats[i], uint_nums[j]);
177 for (i = 0; llong_formats[i] != NULL; i++)
178 for (j = 0; j < ARRAY_SIZE(llong_nums); j++) {
179 count = sprintf(lgbuf, llong_formats[i], llong_nums[j]);
180 test_format(false, lgbuf, count, llong_formats[i], llong_nums[j]);
182 for (i = 0; ullong_formats[i] != NULL; i++)
183 for (j = 0; j < ARRAY_SIZE(ullong_nums); j++) {
184 count = sprintf(lgbuf, ullong_formats[i], ullong_nums[j]);
185 test_format(false, lgbuf, count, ullong_formats[i],