1 .\" Copyright (c) 1990, 1991, 1993
2 .\" The Regents of the University of California. All rights reserved.
4 .\" This code is derived from software contributed to Berkeley by
5 .\" the American National Standards Committee X3, on Information
6 .\" Processing Systems.
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19 .\" California, Berkeley and its contributors.
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36 .\" @(#)strtod.3 8.1 (Berkeley) 6/4/93
50 .Fd #include <stdlib.h>
52 .Fn strtod "const char *nptr" "char **endptr"
56 function converts the initial portion of the string
63 The expected form of the string is an optional plus (``+'') or minus
64 sign (``\-'') followed by a sequence of digits optionally containing
65 a decimal-point character, optionally followed by an exponent.
66 An exponent consists of an ``E'' or ``e'', followed by an optional plus
67 or minus sign, followed by a sequence of digits.
69 Leading white-space characters in the string (as defined by the
71 function) are skipped.
75 function returns the converted value, if any.
81 a pointer to the character after the last character used
82 in the conversion is stored in the location referenced by
85 If no conversion is performed, zero is returned and the value of
87 is stored in the location referenced by
90 If the correct value would cause overflow, plus or minus
92 is returned (according to the sign of the value), and
96 If the correct value would cause underflow, zero is
104 Overflow or underflow occurred.
118 The author of this software is
121 Copyright (c) 1991 by AT&T.
123 Permission to use, copy, modify, and distribute this software for any
124 purpose without fee is hereby granted, provided that this entire notice
125 is included in all copies of any software which is or includes a copy
126 or modification of this software and in all copies of the supporting
127 documentation for such software.
129 THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
130 WARRANTY. IN PARTICULAR, NEITHER THE AUTHOR NOR AT&T MAKES ANY
131 REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
132 OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
134 Contact your vendor for a free copy of the source code to
136 and accompanying functions.