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Annotation of 43BSDReno/lib/libc/stdlib/atof.3, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1990 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted
        !             5: .\" provided that: (1) source distributions retain this entire copyright
        !             6: .\" notice and comment, and (2) distributions including binaries display
        !             7: .\" the following acknowledgement:  ``This product includes software
        !             8: .\" developed by the University of California, Berkeley and its contributors''
        !             9: .\" in the documentation or other materials provided with the distribution
        !            10: .\" and in all advertising materials mentioning features or use of this
        !            11: .\" software. Neither the name of the University nor the names of its
        !            12: .\" contributors may be used to endorse or promote products derived
        !            13: .\" from this software without specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            15: .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            16: .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"    @(#)atof.3      6.2 (Berkeley) 5/16/90
        !            19: .\"
        !            20: .TH ATOF 3 "May 16, 1990"
        !            21: .UC 7
        !            22: .SH NAME
        !            23: atof \- convert ASCII string to double
        !            24: .SH SYNOPSIS
        !            25: .nf
        !            26: .ft B
        !            27: #include <stdlib.h>
        !            28: 
        !            29: double
        !            30: atof(const char *nptr);
        !            31: .ft R
        !            32: .fi
        !            33: .SH DESCRIPTION
        !            34: The
        !            35: .I atof
        !            36: function converts the initial portion of the string pointed to by
        !            37: .I nptr
        !            38: to
        !            39: .I double
        !            40: representation.
        !            41: .PP
        !            42: It is equivalent to:
        !            43: .sp
        !            44: .RS
        !            45: strtod(nptr, (char **)NULL);
        !            46: .RE
        !            47: .SH SEE ALSO
        !            48: atoi(3), atol(3), strtod(3), strtol(3), strtoul(3)
        !            49: .SH STANDARDS
        !            50: .B Atof
        !            51: conforms to ANSI X3.159-1989 (``ANSI C'').
        !            52: .SH BUGS
        !            53: This manual page represents intent instead of actual practice.
        !            54: While it is intended that
        !            55: .I atof
        !            56: be implemented using
        !            57: .IR strtod (3),
        !            58: this has not yet happened.
        !            59: In the current system,
        !            60: .I atof
        !            61: translates a string in the following form to a double:
        !            62: an optional string of spaces, followed by an optional sign (``+'' or ``-''),
        !            63: followed by a string of digits which may contain a decimal point (``.''),
        !            64: followed by an optional exponent flag (``E'' or ``e''), followed by an
        !            65: optionally signed integer.

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