/* $OpenBSD: fp.c,v 1.1 2008/09/07 20:36:10 martynas Exp $ */ /*- * Copyright (c) 2002, 2005 David Schultz * All rights reserved. * * 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 AUTHOR 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 AUTHOR 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. */ /* * Test for printf() floating point formats. */ #include #include #include #include #include #include #include #include #include #define testfmt(result, fmt, ...) \ _testfmt((result), __LINE__, #__VA_ARGS__, fmt, __VA_ARGS__) void _testfmt(const char *, int, const char *, const char *, ...); void smash_stack(void); int main(int argc, char *argv[]) { /* * Basic tests of decimal output functionality. */ testfmt(" 1.000000E+00", "%13E", 1.0); testfmt(" 1.000000", "%13f", 1.0); testfmt(" 1", "%13G", 1.0); testfmt(" 1.000000E+00", "%13LE", 1.0L); testfmt(" 1.000000", "%13Lf", 1.0L); testfmt(" 1", "%13LG", 1.0L); testfmt("2.718282", "%.*f", -2, 2.7182818); testfmt("1.234568e+06", "%e", 1234567.8); testfmt("1234567.800000", "%f", 1234567.8); testfmt("1.23457E+06", "%G", 1234567.8); testfmt("1.234568e+06", "%Le", 1234567.8L); testfmt("1234567.800000", "%Lf", 1234567.8L); testfmt("1.23457E+06", "%LG", 1234567.8L); #if (LDBL_MANT_DIG > DBL_MANT_DIG) && !defined(__i386__) testfmt("123456789.864210", "%Lf", 123456789.8642097531L); testfmt("-1.23457E+08", "%LG", -123456789.8642097531L); testfmt("123456789.8642097531", "%.10Lf", 123456789.8642097531L); testfmt(" 3.141592653589793238e-4000", "%L27.18Le", 3.14159265358979323846e-4000L); #endif /* (LDBL_MANT_DIG > DBL_MANT_DIG) && !defined(__i386__) */ /* * Infinities and NaNs */ #ifdef NAN testfmt("nan", "%e", NAN); testfmt("NAN", "%F", NAN); testfmt("nan", "%g", NAN); testfmt("NAN", "%LE", (long double)NAN); testfmt(" nan", "%05e", NAN); #endif /* NAN */ testfmt("INF", "%E", HUGE_VAL); testfmt("-inf", "%f", -HUGE_VAL); testfmt("+inf", "%+g", HUGE_VAL); testfmt(" inf", "%4.2Le", HUGE_VALL); testfmt("-inf", "%Lf", -HUGE_VALL); testfmt(" inf", "%05e", HUGE_VAL); testfmt(" -inf", "%05e", -HUGE_VAL); /* * Padding */ testfmt("0.000000e+00", "%e", 0.0); testfmt("0.000000", "%F", (double)0.0); testfmt("0", "%G", 0.0); testfmt(" 0", "%3.0Lg", 0.0L); testfmt(" 0", "%5.0f", 0.001); /* * Precision specifiers */ testfmt("1.0123e+00", "%.4e", 1.0123456789); testfmt("1.0123", "%.4f", 1.0123456789); testfmt("1.012", "%.4g", 1.0123456789); testfmt("1.2346e-02", "%.4e", 0.0123456789); testfmt("0.0123", "%.4f", 0.0123456789); testfmt("0.01235", "%.4g", 0.0123456789); /* * Signed conversions */ testfmt("+2.500000e-01", "%+e", 0.25); testfmt("+0.000000", "%+F", 0.0); testfmt("-1", "%+g", -1.0); testfmt("-1.000000e+00", "% e", -1.0); testfmt("+1.000000", "% +f", 1.0); testfmt(" 1", "% g", 1.0); testfmt(" 0", "% g", 0.0); /* * ``Alternate form'' */ testfmt("1.250e+00", "%#.3e", 1.25); testfmt("123.000000", "%#f", 123.0); testfmt(" 12345.", "%#7.5g", 12345.0); testfmt(" 1.00000", "%#8g", 1.0); testfmt("0.0", "%#.2g", 0.0); /* * Padding and decimal point placement */ testfmt("03.2E+00", "%08.1E", 3.25); testfmt("003.25", "%06.2F", 3.25); testfmt("0003.25", "%07.4G", 3.25); testfmt("3.14159e-05", "%g", 3.14159e-5); testfmt("0.000314159", "%g", 3.14159e-4); testfmt("3.14159e+06", "%g", 3.14159e6); testfmt("314159", "%g", 3.14159e5); testfmt("314159.", "%#g", 3.14159e5); testfmt(" 9.000000e+03", "%13e", 9000.0); testfmt(" 9000.000000", "%12f", 9000.0); testfmt(" 9000", "%5g", 9000.0); testfmt(" 900000.", "%#8g", 900000.0); testfmt(" 9e+06", "%6g", 9000000.0); testfmt(" 9.000000e-04", "%13e", 0.0009); testfmt(" 0.000900", "%9f", 0.0009); testfmt(" 0.0009", "%7g", 0.0009); testfmt(" 9e-05", "%6g", 0.00009); testfmt(" 9.00000e-05", "%#12g", 0.00009); testfmt(" 9.e-05", "%#7.1g", 0.00009); testfmt(" 0.0", "%4.1f", 0.0); testfmt("90.0", "%4.1f", 90.0); testfmt(" 100", "%4.0f", 100.0); testfmt("9.0e+01", "%4.1e", 90.0); testfmt("1e+02", "%4.0e", 100.0); /* * Hexadecimal floating point (%a, %A) tests. Some of these * are only valid if the implementation converts to hex digits * on nibble boundaries. */ testfmt("0x0p+0", "%a", 0x0.0p0); testfmt("0X0.P+0", "%#LA", 0x0.0p0L); #ifdef NAN testfmt("inf", "%La", (long double)INFINITY); testfmt("+INF", "%+A", INFINITY); testfmt("nan", "%La", (long double)NAN); testfmt("NAN", "%A", NAN); #endif /* NAN */ testfmt(" 0x1.23p+0", "%10a", 0x1.23p0); testfmt(" 0x1.23p-500", "%12a", 0x1.23p-500); testfmt(" 0x1.2p+40", "%10.1a", 0x1.23p40); testfmt(" 0X1.230000000000000000000000P-4", "%32.24A", 0x1.23p-4); testfmt("0x1p-1074", "%a", 0x1p-1074); testfmt("0x1.2345p-1024", "%a", 0x1.2345p-1024); return (0); } void smash_stack(void) { static uint32_t junk = 0xdeadbeef; uint32_t buf[512]; int i; for (i = 0; i < sizeof(buf) / sizeof(buf[0]); i++) buf[i] = junk; } void _testfmt(const char *result, int line, const char *argstr, const char *fmt,...) { char s[100]; va_list ap; va_start(ap, fmt); smash_stack(); vsnprintf(s, sizeof(s), fmt, ap); if (strcmp(result, s) != 0) { fprintf(stderr, "%d: printf(\"%s\", %s) ==> [%s], expected [%s]\n", line, fmt, argstr, s, result); abort(); } }