/* * snprintf test suite. * * Written by Russ Allbery * Copyright 2009 Board of Trustees, Leland Stanford Jr. University * Copyright (c) 2004, 2005, 2006 * by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, * 2002, 2003 by The Internet Software Consortium and Rich Salz * * See LICENSE for licensing terms. */ #include #include #include /* * Intentionally don't add the printf attribute here since we pass a * zero-length printf format during testing and don't want warnings. */ int test_snprintf(char *str, size_t count, const char *fmt, ...); int test_vsnprintf(char *str, size_t count, const char *fmt, va_list args); static const char string[] = "abcdefghijklmnopqrstuvwxyz0123456789"; static const char *const fp_formats[] = { "%-1.5f", "%1.5f", "%31.9f", "%10.5f", "% 10.5f", "%+22.9f", "%+4.9f", "%01.3f", "%3.1f", "%3.2f", "%.0f", "%.1f", "%f", /* %e and %g formats aren't really implemented yet. */ #if 0 "%-1.5e", "%1.5e", "%31.9e", "%10.5e", "% 10.5e", "%+22.9e", "%+4.9e", "%01.3e", "%3.1e", "%3.2e", "%.0e", "%.1e", "%e", "%-1.5g", "%1.5g", "%31.9g", "%10.5g", "% 10.5g", "%+22.9g", "%+4.9g", "%01.3g", "%3.1g", "%3.2g", "%.0g", "%.1g", "%g", #endif NULL }; static const char *const int_formats[] = { "%-1.5d", "%1.5d", "%31.9d", "%5.5d", "%10.5d", "% 10.5d", "%+22.30d", "%01.3d", "%4d", "%d", "%ld", NULL }; static const char *const uint_formats[] = { "%-1.5lu", "%1.5lu", "%31.9lu", "%5.5lu", "%10.5lu", "% 10.5lu", "%+6.30lu", "%01.3lu", "%4lu", "%lu", "%4lx", "%4lX", "%01.3lx", "%1lo", NULL }; static const char *const llong_formats[] = { "%lld", "%-1.5lld", "%1.5lld", "%123.9lld", "%5.5lld", "%10.5lld", "% 10.5lld", "%+22.33lld", "%01.3lld", "%4lld", NULL }; static const char *const ullong_formats[] = { "%llu", "%-1.5llu", "%1.5llu", "%123.9llu", "%5.5llu", "%10.5llu", "% 10.5llu", "%+22.33llu", "%01.3llu", "%4llu", "%llx", "%llo", NULL }; static const double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996, 0.9996, 1.996, 4.136, 0.1, 0.01, 0.001, 10.1, 0 }; static long int_nums[] = { -1, 134, 91340, 341, 0203, 0 }; static unsigned long uint_nums[] = { (unsigned long) -1, 134, 91340, 341, 0203, 0 }; static long long llong_nums[] = { ~(long long) 0, /* All-1 bit pattern. */ (~(unsigned long long) 0) >> 1, /* Largest signed long long. */ -150, 134, 91340, 341, 0 }; static unsigned long long ullong_nums[] = { ~(unsigned long long) 0, /* All-1 bit pattern. */ (~(unsigned long long) 0) >> 1, /* Largest signed long long. */ 134, 91340, 341, 0 }; static void test_format(bool truncate, const char *expected, int count, const char *format, ...) { char buf[128]; int result; va_list args; va_start(args, format); result = test_vsnprintf(buf, truncate ? 32 : sizeof(buf), format, args); va_end(args); is_string(expected, buf, "format %s, wanted %s", format, expected); is_int(count, result, "...and output length correct"); } int main(void) { int n, i, count; unsigned int j; long lcount; char lgbuf[128]; plan(8 + (18 + (ARRAY_SIZE(fp_formats) - 1) * ARRAY_SIZE(fp_nums) + (ARRAY_SIZE(int_formats) - 1) * ARRAY_SIZE(int_nums) + (ARRAY_SIZE(uint_formats) - 1) * ARRAY_SIZE(uint_nums) + (ARRAY_SIZE(llong_formats) - 1) * ARRAY_SIZE(llong_nums) + (ARRAY_SIZE(ullong_formats) - 1) * ARRAY_SIZE(ullong_nums)) * 2); is_int(4, test_snprintf(NULL, 0, "%s", "abcd"), "simple string length"); is_int(2, test_snprintf(NULL, 0, "%d", 20), "number length"); is_int(7, test_snprintf(NULL, 0, "Test %.2s", "abcd"), "limited string"); is_int(1, test_snprintf(NULL, 0, "%c", 'a'), "character length"); is_int(0, test_snprintf(NULL, 0, ""), "empty format length"); test_format(true, "abcd", 4, "%s", "abcd"); test_format(true, "20", 2, "%d", 20); test_format(true, "Test ab", 7, "Test %.2s", "abcd"); test_format(true, "a", 1, "%c", 'a'); test_format(true, "", 0, ""); test_format(true, "abcdefghijklmnopqrstuvwxyz01234", 36, "%s", string); test_format(true, "abcdefghij", 10, "%.10s", string); test_format(true, " abcdefghij", 12, "%12.10s", string); test_format(true, " abcdefghijklmnopqrstuvwxyz0", 40, "%40s", string); test_format(true, "abcdefghij ", 14, "%-14.10s", string); test_format(true, " abcdefghijklmnopq", 50, "%50s", string); test_format(true, "%abcd%", 6, "%%%0s%%", "abcd"); test_format(true, "", 0, "%.0s", string); test_format(true, "abcdefghijklmnopqrstuvwxyz 444", 32, "%.26s %d", string, 4444); test_format(true, "abcdefghijklmnopqrstuvwxyz -2.", 32, "%.26s %.1f", string, -2.5); test_format(true, "abcdefghij4444", 14, "%.10s%n%d", string, &count, 4444); is_int(10, count, "correct output from %%n"); test_format(true, "abcdefghijklmnopqrstuvwxyz01234", 36, "%n%s%ln", &count, string, &lcount); is_int(0, count, "correct output from two %%n"); is_int(31, lcount, "correct output from long %%ln"); test_format(true, "(null)", 6, "%s", NULL); n = 26; for (i = 0; fp_formats[i] != NULL; i++) for (j = 0; j < ARRAY_SIZE(fp_nums); j++) { count = sprintf(lgbuf, fp_formats[i], fp_nums[j]); test_format(false, lgbuf, count, fp_formats[i], fp_nums[j]); } for (i = 0; int_formats[i] != NULL; i++) for (j = 0; j < ARRAY_SIZE(int_nums); j++) { count = sprintf(lgbuf, int_formats[i], int_nums[j]); test_format(false, lgbuf, count, int_formats[i], int_nums[j]); } for (i = 0; uint_formats[i] != NULL; i++) for (j = 0; j < ARRAY_SIZE(uint_nums); j++) { count = sprintf(lgbuf, uint_formats[i], uint_nums[j]); test_format(false, lgbuf, count, uint_formats[i], uint_nums[j]); } for (i = 0; llong_formats[i] != NULL; i++) for (j = 0; j < ARRAY_SIZE(llong_nums); j++) { count = sprintf(lgbuf, llong_formats[i], llong_nums[j]); test_format(false, lgbuf, count, llong_formats[i], llong_nums[j]); } for (i = 0; ullong_formats[i] != NULL; i++) for (j = 0; j < ARRAY_SIZE(ullong_nums); j++) { count = sprintf(lgbuf, ullong_formats[i], ullong_nums[j]); test_format(false, lgbuf, count, ullong_formats[i], ullong_nums[j]); } return 0; }