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authorPaul Eggert <eggert@cs.ucla.edu>2006-08-21 07:26:38 +0000
committerPaul Eggert <eggert@cs.ucla.edu>2006-08-21 07:26:38 +0000
commit0f7a044109b860443ecaa4f8a37652b1b4423057 (patch)
treeb5834ed9867213221a2636e0fa7e8da178749a76 /lib/strtod.c
parent11fd62b0080ce376b26241bd789b7e7390befef6 (diff)
downloadcoreutils-0f7a044109b860443ecaa4f8a37652b1b4423057.tar.xz
Remove from CVS, since the bootstrap script generates them automatically.
Diffstat (limited to 'lib/strtod.c')
-rw-r--r--lib/strtod.c176
1 files changed, 0 insertions, 176 deletions
diff --git a/lib/strtod.c b/lib/strtod.c
deleted file mode 100644
index 73f01f974..000000000
--- a/lib/strtod.c
+++ /dev/null
@@ -1,176 +0,0 @@
-/* Copyright (C) 1991, 1992, 1997, 1999, 2003, 2006 Free Software Foundation, Inc.
-
- 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.
-
- 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <errno.h>
-
-#include <ctype.h>
-
-#include <math.h>
-
-#include <float.h>
-#include <stdlib.h>
-#include <string.h>
-
-/* 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
-strtod (const char *nptr, char **endptr)
-{
- register const char *s;
- short int sign;
-
- /* The number so far. */
- double num;
-
- int got_dot; /* Found a decimal point. */
- int got_digit; /* Seen any digits. */
-
- /* The exponent of the number. */
- long int exponent;
-
- if (nptr == NULL)
- {
- errno = EINVAL;
- goto noconv;
- }
-
- s = nptr;
-
- /* Eat whitespace. */
- while (isspace ((unsigned char) *s))
- ++s;
-
- /* Get the sign. */
- sign = *s == '-' ? -1 : 1;
- if (*s == '-' || *s == '+')
- ++s;
-
- num = 0.0;
- got_dot = 0;
- got_digit = 0;
- exponent = 0;
- for (;; ++s)
- {
- if ('0' <= *s && *s <= '9')
- {
- got_digit = 1;
-
- /* Make sure that multiplication by 10 will not overflow. */
- if (num > DBL_MAX * 0.1)
- /* The value of the digit doesn't matter, since we have already
- gotten as many digits as can be represented in a `double'.
- This doesn't necessarily mean the result will overflow.
- The exponent may reduce it to within range.
-
- We just need to record that there was another
- digit so that we can multiply by 10 later. */
- ++exponent;
- else
- num = (num * 10.0) + (*s - '0');
-
- /* Keep track of the number of digits after the decimal point.
- If we just divided by 10 here, we would lose precision. */
- if (got_dot)
- --exponent;
- }
- else if (!got_dot && *s == '.')
- /* Record that we have found the decimal point. */
- got_dot = 1;
- else
- /* Any other character terminates the number. */
- break;
- }
-
- if (!got_digit)
- goto noconv;
-
- if (tolower ((unsigned char) *s) == 'e')
- {
- /* Get the exponent specified after the `e' or `E'. */
- int save = errno;
- char *end;
- long int exp;
-
- errno = 0;
- ++s;
- exp = strtol (s, &end, 10);
- if (errno == ERANGE)
- {
- /* The exponent overflowed a `long int'. It is probably a safe
- assumption that an exponent that cannot be represented by
- a `long int' exceeds the limits of a `double'. */
- if (endptr != NULL)
- *endptr = end;
- if (exp < 0)
- goto underflow;
- else
- goto overflow;
- }
- else if (end == s)
- /* There was no exponent. Reset END to point to
- the 'e' or 'E', so *ENDPTR will be set there. */
- end = (char *) s - 1;
- errno = save;
- s = end;
- exponent += exp;
- }
-
- if (endptr != NULL)
- *endptr = (char *) s;
-
- if (num == 0.0)
- return 0.0;
-
- /* Multiply NUM by 10 to the EXPONENT power,
- checking for overflow and underflow. */
-
- if (exponent < 0)
- {
- if (num < DBL_MIN * pow (10.0, (double) -exponent))
- goto underflow;
- }
- else if (exponent > 0)
- {
- if (num > DBL_MAX * pow (10.0, (double) -exponent))
- goto overflow;
- }
-
- num *= pow (10.0, (double) exponent);
-
- return num * sign;
-
-overflow:
- /* Return an overflow error. */
- errno = ERANGE;
- return HUGE_VAL * sign;
-
-underflow:
- /* Return an underflow error. */
- if (endptr != NULL)
- *endptr = (char *) nptr;
- errno = ERANGE;
- return 0.0;
-
-noconv:
- /* There was no number. */
- if (endptr != NULL)
- *endptr = (char *) nptr;
- return 0.0;
-}