| #ifndef _XOPEN_SOURCE |
| #define _XOPEN_SOURCE 700 |
| #endif |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <limits.h> |
| #include <math.h> |
| #include "test.h" |
| |
| #define DISABLE_SLOW_TESTS |
| |
| #define TEST(r, f, x, m) ( \ |
| ((r) = (f)) == (x) || \ |
| (t_error("%s failed (" m ")\n", #f, r, x), 0) ) |
| |
| #define TEST_S(s, x, m) ( \ |
| !strcmp((s),(x)) || \ |
| (t_error("[%s] != [%s] (%s)\n", s, x, m), 0) ) |
| |
| static const struct { |
| const char *fmt; |
| int i; |
| const char *expect; |
| } int_tests[] = { |
| |
| { "%04d", 12, "0012" }, |
| { "%.3d", 12, "012" }, |
| { "%3d", 12, " 12" }, |
| { "%-3d", 12, "12 " }, |
| { "%+3d", 12, "+12" }, |
| { "%+-5d", 12, "+12 " }, |
| { "%+- 5d", 12, "+12 " }, |
| { "%- 5d", 12, " 12 " }, |
| { "% d", 12, " 12" }, |
| { "%0-5d", 12, "12 " }, |
| { "%-05d", 12, "12 " }, |
| |
| |
| { "%.0d", 0, "" }, |
| { "%.0o", 0, "" }, |
| { "%#.0d", 0, "" }, |
| { "%#.0o", 0, "" }, |
| { "%#.0x", 0, "" }, |
| |
| |
| { "%2.0u", 0, " " }, |
| { "%02.0u", 0, " " }, |
| { "%2.0d", 0, " " }, |
| { "%02.0d", 0, " " }, |
| { "% .0d", 0, " " }, |
| { "%+.0d", 0, "+" }, |
| |
| |
| { "%x", 63, "3f" }, |
| { "%#x", 63, "0x3f" }, |
| { "%X", 63, "3F" }, |
| |
| |
| { "%o", 15, "17" }, |
| { "%#o", 15, "017" }, |
| |
| { NULL, 0.0, NULL } |
| }; |
| |
| static const struct { |
| const char *fmt; |
| double f; |
| const char *expect; |
| } fp_tests[] = { |
| |
| { "%a", 0.0, "0x0p+0" }, |
| { "%e", 0.0, "0.000000e+00" }, |
| { "%f", 0.0, "0.000000" }, |
| { "%g", 0.0, "0" }, |
| { "%#g", 0.0, "0.00000" }, |
| { "%la", 0.0, "0x0p+0" }, |
| { "%le", 0.0, "0.000000e+00" }, |
| { "%lf", 0.0, "0.000000" }, |
| { "%lg", 0.0, "0" }, |
| { "%#lg", 0.0, "0.00000" }, |
| |
| |
| { "%f", 1.1, "1.100000" }, |
| { "%f", 1.2, "1.200000" }, |
| { "%f", 1.3, "1.300000" }, |
| { "%f", 1.4, "1.400000" }, |
| { "%f", 1.5, "1.500000" }, |
| { "%.4f", 1.06125, "1.0612" }, |
| { "%.2f", 1.375, "1.38" }, |
| { "%.1f", 1.375, "1.4" }, |
| { "%.1lf", 1.375, "1.4" }, |
| { "%.15f", 1.1, "1.100000000000000" }, |
| { "%.16f", 1.1, "1.1000000000000001" }, |
| { "%.17f", 1.1, "1.10000000000000009" }, |
| { "%.2e", 1500001.0, "1.50e+06" }, |
| { "%.2e", 1505000.0, "1.50e+06" }, |
| { "%.2e", 1505000.00000095367431640625, "1.51e+06" }, |
| { "%.2e", 1505001.0, "1.51e+06" }, |
| { "%.2e", 1506000.0, "1.51e+06" }, |
| |
| |
| { "%.15g", 1.23456789012345, "1.23456789012345" }, |
| |
| |
| { "%g", 0.0001, "0.0001" }, |
| { "%g", 0.00001, "1e-05" }, |
| { "%g", 123456, "123456" }, |
| { "%g", 1234567, "1.23457e+06" }, |
| { "%.7g", 1234567, "1234567" }, |
| { "%.7g", 12345678, "1.234568e+07" }, |
| { "%.8g", 0.1, "0.1" }, |
| { "%.9g", 0.1, "0.1" }, |
| { "%.10g", 0.1, "0.1" }, |
| { "%.11g", 0.1, "0.1" }, |
| |
| |
| { "%.15f", M_PI, "3.141592653589793" }, |
| { "%.18f", M_PI, "3.141592653589793116" }, |
| |
| |
| { "%.0f", 340282366920938463463374607431768211456.0, |
| "340282366920938463463374607431768211456" }, |
| |
| { NULL, 0.0, NULL } |
| }; |
| |
| int main(void) |
| { |
| int i, j, k; |
| char b[2000]; |
| |
| TEST(i, snprintf(0, 0, "%d", 123456), 6, "length returned %d != %d"); |
| TEST(i, snprintf(0, 0, "%.4s", "hello"), 4, "length returned %d != %d"); |
| TEST(i, snprintf(b, 0, "%.0s", "goodbye"), 0, "length returned %d != %d"); |
| |
| strcpy(b, "xxxxxxxx"); |
| TEST(i, snprintf(b, 4, "%d", 123456), 6, "length returned %d != %d"); |
| TEST_S(b, "123", "incorrect output"); |
| TEST(i, b[5], 'x', "buffer overrun"); |
| |
| |
| TEST(i, snprintf(b, sizeof b, "%.1022f", 0x1p-1021), 1024, "%d != %d"); |
| b[1] = '0'; |
| for (i=0; i<1021; i++) { |
| for (k=0, j=1023; j>0; j--) { |
| if (b[j]<'5') b[j]+=b[j]-'0'+k, k=0; |
| else b[j]+=b[j]-'0'-10+k, k=1; |
| } |
| } |
| TEST(i, b[1], '1', "'%c' != '%c'"); |
| for (j=2; b[j]=='0'; j++); |
| TEST(i, j, 1024, "%d != %d"); |
| |
| |
| #ifndef DISABLE_SLOW_TESTS |
| errno = 0; |
| TEST(i, snprintf(NULL, 0, "%.*u", 2147483647, 0), 2147483647, "cannot print max length %d"); |
| TEST(i, snprintf(NULL, 0, "%.*u ", 2147483647, 0), -1, "integer overflow %d"); |
| TEST(i, errno, EOVERFLOW, "after overflow: %d != %d"); |
| #endif |
| for (j=0; int_tests[j].fmt; j++) { |
| i = snprintf(b, sizeof b, int_tests[j].fmt, int_tests[j].i); |
| if (i != strlen(int_tests[j].expect)) { |
| t_error("snprintf(b, sizeof b, \"%s\", %d) returned %d wanted %d\n", |
| int_tests[j].fmt, int_tests[j].i, i, strlen(int_tests[j].expect)); |
| } |
| if (strcmp(b, int_tests[j].expect) != 0) |
| t_error("bad integer conversion: got \"%s\", want \"%s\"\n", b, int_tests[j].expect); |
| } |
| |
| for (j=0; fp_tests[j].fmt; j++) { |
| i = snprintf(b, sizeof b, fp_tests[j].fmt, fp_tests[j].f); |
| if (i != strlen(fp_tests[j].expect)) { |
| t_error("snprintf(b, sizeof b, \"%s\", %f) returned %d wanted %d\n", |
| fp_tests[j].fmt, fp_tests[j].f, i, strlen(fp_tests[j].expect)); |
| } |
| if (strcmp(b, fp_tests[j].expect) != 0) |
| t_error("bad floating-point conversion: got \"%s\", want \"%s\"\n", b, fp_tests[j].expect); |
| } |
| |
| TEST(i, snprintf(0, 0, "%.4a", 1.0), 11, "%d != %d"); |
| return t_status; |
| } |