diff options
Diffstat (limited to 'lib/strtod.c')
| -rw-r--r-- | lib/strtod.c | 84 |
1 files changed, 47 insertions, 37 deletions
diff --git a/lib/strtod.c b/lib/strtod.c index 34b82232ec..2f6b894cfa 100644 --- a/lib/strtod.c +++ b/lib/strtod.c @@ -1,46 +1,60 @@ /* Copyright (C) 1991, 1992 Free Software Foundation, Inc. -NOTE: The canonical source of this file is maintained with the GNU C Library. -Bugs can be reported to bug-glibc@prep.ai.mit.edu. + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. -This program is free software; you can redistribute it and/or modify it -under the terms of the GNU General Public License as published by the -Free Software Foundation; either version 2, or (at your option) any -later version. + This program 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 General Public License for more details. -This program 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 General Public License for more details. + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif -#include <ansidecl.h> -#include <localeinfo.h> #include <errno.h> -#include <float.h> #include <ctype.h> -#include <stdlib.h> -#include <string.h> #include <math.h> +#ifdef HAVE_FLOAT_H +#include <float.h> +#else +#define DBL_MAX 1.7976931348623159e+308 +#define DBL_MIN 2.2250738585072010e-308 +#endif + +#if STDC_HEADERS +#include <stdlib.h> +#include <string.h> +#else +#define NULL 0 +extern int errno; +#ifndef HUGE_VAL +#define HUGE_VAL HUGE +#endif +#endif /* Convert NPTR to a double. If ENDPTR is not NULL, a pointer to the character after the last one used in the number is put in *ENDPTR. */ double -DEFUN(strtod, (nptr, endptr), CONST char *nptr AND char **endptr) +strtod (nptr, endptr) + const char *nptr; + char **endptr; { - register CONST char *s; + register const char *s; short int sign; - wchar_t decimal; /* Decimal point character. */ /* The number so far. */ double num; - int got_dot; /* Found a decimal point. */ - int got_digit; /* Seen any digits. */ + int got_dot; /* Found a decimal point. */ + int got_digit; /* Seen any digits. */ /* The exponent of the number. */ long int exponent; @@ -51,14 +65,10 @@ DEFUN(strtod, (nptr, endptr), CONST char *nptr AND char **endptr) goto noconv; } - /* Figure out the decimal point character. */ - if (mbtowc(&decimal, _numeric_info->decimal_point, 1) <= 0) - decimal = (wchar_t) *_numeric_info->decimal_point; - s = nptr; /* Eat whitespace. */ - while (isspace(*s)) + while (isspace (*s)) ++s; /* Get the sign. */ @@ -94,7 +104,7 @@ DEFUN(strtod, (nptr, endptr), CONST char *nptr AND char **endptr) if (got_dot) --exponent; } - else if (!got_dot && (wchar_t) *s == decimal) + else if (!got_dot && *s == '.') /* Record that we have found the decimal point. */ got_dot = 1; else @@ -105,7 +115,7 @@ DEFUN(strtod, (nptr, endptr), CONST char *nptr AND char **endptr) if (!got_digit) goto noconv; - if (tolower(*s) == 'e') + if (tolower (*s) == 'e') { /* Get the exponent specified after the `e' or `E'. */ int save = errno; @@ -114,7 +124,7 @@ DEFUN(strtod, (nptr, endptr), CONST char *nptr AND char **endptr) errno = 0; ++s; - exp = strtol(s, &end, 10); + exp = strtol (s, &end, 10); if (errno == ERANGE) { /* The exponent overflowed a `long int'. It is probably a safe @@ -147,32 +157,32 @@ DEFUN(strtod, (nptr, endptr), CONST char *nptr AND char **endptr) if (exponent < 0) { - if (num < DBL_MIN * pow(10.0, (double) -exponent)) + if (num < DBL_MIN * pow (10.0, (double) -exponent)) goto underflow; } else if (exponent > 0) { - if (num > DBL_MAX * pow(10.0, (double) -exponent)) + if (num > DBL_MAX * pow (10.0, (double) -exponent)) goto overflow; } - num *= pow(10.0, (double) exponent); + num *= pow (10.0, (double) exponent); return num * sign; - overflow: +overflow: /* Return an overflow error. */ errno = ERANGE; return HUGE_VAL * sign; - underflow: +underflow: /* Return an underflow error. */ if (endptr != NULL) *endptr = (char *) nptr; errno = ERANGE; return 0.0; - noconv: +noconv: /* There was no number. */ if (endptr != NULL) *endptr = (char *) nptr; |