diff options
Diffstat (limited to 'contrib/syslinux/latest/com32/lib/math/strtod.c')
| -rw-r--r-- | contrib/syslinux/latest/com32/lib/math/strtod.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/contrib/syslinux/latest/com32/lib/math/strtod.c b/contrib/syslinux/latest/com32/lib/math/strtod.c deleted file mode 100644 index f99531a..0000000 --- a/contrib/syslinux/latest/com32/lib/math/strtod.c +++ /dev/null @@ -1,156 +0,0 @@ -/* - * strtod.c - * - * Convert string to double - * - * Copyright (C) 2002 Michael Ringgaard. All rights reserved. - * Copyright 2006-2008 H. Peter Anvin - 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. - * 3. Neither the name of the project nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 - * COPYRIGHT OWNER 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. - */ - -#include <errno.h> -#include <ctype.h> -#include <stdlib.h> -#include <math.h> - -static inline int is_real(double x) -{ - const double Inf = 1.0 / 0.0; - return (x < Inf) && (x >= -Inf); -} - -double strtod(const char *str, char **endptr) -{ - double number; - int exponent; - int negative; - char *p = (char *)str; - double p10; - int n; - int num_digits; - int num_decimals; - const double Inf = 1.0 / 0.0; - - // Skip leading whitespace - while (isspace(*p)) - p++; - - // Handle optional sign - negative = 0; - switch (*p) { - case '-': - negative = 1; // Fall through to increment position - case '+': - p++; - } - - number = 0.; - exponent = 0; - num_digits = 0; - num_decimals = 0; - - // Process string of digits - while (isdigit(*p)) { - number = number * 10. + (*p - '0'); - p++; - num_digits++; - } - - // Process decimal part - if (*p == '.') { - p++; - - while (isdigit(*p)) { - number = number * 10. + (*p - '0'); - p++; - num_digits++; - num_decimals++; - } - - exponent -= num_decimals; - } - - if (num_digits == 0) { - errno = ERANGE; - return 0.0; - } - // Correct for sign - if (negative) - number = -number; - - // Process an exponent string - if (*p == 'e' || *p == 'E') { - // Handle optional sign - negative = 0; - switch (*++p) { - case '-': - negative = 1; // Fall through to increment pos - case '+': - p++; - } - - // Process string of digits - n = 0; - while (isdigit(*p)) { - n = n * 10 + (*p - '0'); - p++; - } - - if (negative) - exponent -= n; - else - exponent += n; - } - - if (exponent < __DBL_MIN_EXP__ || exponent > __DBL_MAX_EXP__) { - errno = ERANGE; - return Inf; - } - // Scale the result - p10 = 10.; - n = exponent; - if (n < 0) - n = -n; - while (n) { - if (n & 1) { - if (exponent < 0) - number /= p10; - else - number *= p10; - } - n >>= 1; - p10 *= p10; - } - - if (!is_real(number)) - errno = ERANGE; - if (endptr) - *endptr = p; - - return number; -} |