/* Copyright (C) 1998-2014 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _GNU_SOURCE # define _GNU_SOURCE 1 #endif #include <float.h> #include <math.h> #include <stdio.h> #include <stdlib.h> #include <string.h> int error_count; typedef struct { double value; int ndigit; int decpt; char result[30]; } testcase; typedef char * ((*efcvt_func) (double, int, int *, int *)); typedef int ((*efcvt_r_func) (double, int, int *, int *, char *, size_t)); static testcase ecvt_tests[] = { { 0.0, 0, 1, "" }, { 10.0, 0, 2, "" }, { 10.0, 1, 2, "1" }, { 10.0, 5, 2, "10000" }, { -12.0, 5, 2, "12000" }, { 0.2, 4, 0, "2000" }, { 0.02, 4, -1, "2000" }, { 5.5, 1, 1, "6" }, { 1.0, -1, 1, "" }, { 0.01, 2, -1, "10" }, { 100.0, -2, 3, "" }, { 100.0, -5, 3, "" }, { 100.0, -4, 3, "" }, { 100.01, -4, 3, "" }, { 123.01, -4, 3, "" }, { 126.71, -4, 3, "" }, { 0.0, 4, 1, "0000" }, #if DBL_MANT_DIG == 53 { 0x1p-1074, 3, -323, "494" }, { -0x1p-1074, 3, -323, "494" }, #endif /* -1.0 is end marker. */ { -1.0, 0, 0, "" } }; static testcase fcvt_tests[] = { { 0.0, 0, 1, "0" }, { 10.0, 0, 2, "10" }, { 10.0, 1, 2, "100" }, { 10.0, 4, 2, "100000" }, { -12.0, 5, 2, "1200000" }, { 0.2, 4, 0, "2000" }, { 0.02, 4, -1, "200" }, { 5.5, 1, 1, "55" }, { 5.5, 0, 1, "6" }, { 0.01, 2, -1, "1" }, { 100.0, -2, 3, "100" }, { 100.0, -5, 3, "100" }, { 100.0, -4, 3, "100" }, { 100.01, -4, 3, "100" }, { 123.01, -4, 3, "100" }, { 126.71, -4, 3, "100" }, { 322.5, 16, 3, "3225000000000000000" }, /* -1.0 is end marker. */ { -1.0, 0, 0, "" } }; static void output_error (const char *name, double value, int ndigit, const char *exp_p, int exp_decpt, int exp_sign, char *res_p, int res_decpt, int res_sign) { printf ("%s returned wrong result for value: %f, ndigits: %d\n", name, value, ndigit); printf ("Result was p: \"%s\", decpt: %d, sign: %d\n", res_p, res_decpt, res_sign); printf ("Should be p: \"%s\", decpt: %d, sign: %d\n", exp_p, exp_decpt, exp_sign); ++error_count; } static void output_r_error (const char *name, double value, int ndigit, const char *exp_p, int exp_decpt, int exp_sign, int exp_return, char *res_p, int res_decpt, int res_sign, int res_return) { printf ("%s returned wrong result for value: %f, ndigits: %d\n", name, value, ndigit); printf ("Result was buf: \"%s\", decpt: %d, sign: %d return value: %d\n", res_p, res_decpt, res_sign, res_return); printf ("Should be buf: \"%s\", decpt: %d, sign: %d\n", exp_p, exp_decpt, exp_sign); ++error_count; } static void test (testcase tests[], efcvt_func efcvt, const char *name) { int no = 0; int decpt, sign; char *p; while (tests[no].value != -1.0) { p = efcvt (tests[no].value, tests[no].ndigit, &decpt, &sign); if (decpt != tests[no].decpt || sign != (tests[no].value < 0) || strcmp (p, tests[no].result) != 0) output_error (name, tests[no].value, tests[no].ndigit, tests[no].result, tests[no].decpt, (tests[no].value < 0), p, decpt, sign); ++no; } } static void test_r (testcase tests[], efcvt_r_func efcvt_r, const char *name) { int no = 0; int decpt, sign, res; char buf [1024]; while (tests[no].value != -1.0) { res = efcvt_r (tests[no].value, tests[no].ndigit, &decpt, &sign, buf, sizeof (buf)); if (res != 0 || decpt != tests[no].decpt || sign != (tests[no].value < 0) || strcmp (buf, tests[no].result) != 0) output_r_error (name, tests[no].value, tests[no].ndigit, tests[no].result, tests[no].decpt, 0, (tests[no].value < 0), buf, decpt, sign, res); ++no; } } static void special (void) { int decpt, sign, res; char *p; char buf [1024]; p = ecvt (NAN, 10, &decpt, &sign); if (sign != 0 || strcmp (p, "nan") != 0) output_error ("ecvt", NAN, 10, "nan", 0, 0, p, decpt, sign); p = ecvt (INFINITY, 10, &decpt, &sign); if (sign != 0 || strcmp (p, "inf") != 0) output_error ("ecvt", INFINITY, 10, "inf", 0, 0, p, decpt, sign); /* Simply make sure these calls with large NDIGITs don't crash. */ (void) ecvt (123.456, 10000, &decpt, &sign); (void) fcvt (123.456, 10000, &decpt, &sign); /* Some tests for the reentrant functions. */ /* Use a too small buffer. */ res = ecvt_r (123.456, 10, &decpt, &sign, buf, 1); if (res == 0) { printf ("ecvt_r with a too small buffer was succesful.\n"); ++error_count; } res = fcvt_r (123.456, 10, &decpt, &sign, buf, 1); if (res == 0) { printf ("fcvt_r with a too small buffer was succesful.\n"); ++error_count; } } int main (void) { test (ecvt_tests, ecvt, "ecvt"); test (fcvt_tests, fcvt, "fcvt"); test_r (ecvt_tests, ecvt_r, "ecvt_r"); test_r (fcvt_tests, fcvt_r, "fcvt_r"); special (); return error_count; }