--- Libc/Libc-262/stdlib/strtod.3
+++ Libc/Libc-763.11/stdlib/strtod.3
@@ -13,10 +13,6 @@
 .\" 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. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
 .\" 4. Neither the name of the University nor the names of its contributors
 .\"    may be used to endorse or promote products derived from this software
 .\"    without specific prior written permission.
@@ -34,48 +30,115 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)strtod.3	8.1 (Berkeley) 6/4/93
-.\" $FreeBSD: src/lib/libc/stdlib/strtod.3,v 1.13 2001/09/07 14:46:36 asmodai Exp $
-.\"
-.Dd June 4, 1993
+.\" $FreeBSD: src/lib/libc/stdlib/strtod.3,v 1.22 2007/12/16 21:19:28 das Exp $
+.\"
+.Dd March 2, 2003
 .Dt STRTOD 3
 .Os
 .Sh NAME
-.Nm strtod
+.Nm strtod , strtof , strtold
 .Nd convert
 .Tn ASCII
-string to double
+string to floating point
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
 .In stdlib.h
 .Ft double
-.Fn strtod "const char *nptr" "char **endptr"
+.Fo strtod
+.Fa "const char *restrict nptr"
+.Fa "char **restrict endptr"
+.Fc
+.Ft float
+.Fo strtof
+.Fa "const char *restrict nptr"
+.Fa "char **restrict endptr"
+.Fc
+.Ft "long double"
+.Fo strtold
+.Fa "const char *restrict nptr"
+.Fa "char **restrict endptr"
+.Fc
 .Sh DESCRIPTION
-The
-.Fn strtod
-function converts the initial portion of the string
+These conversion
+functions convert the initial portion of the string
 pointed to by
 .Fa nptr
 to
-.Em double
-representation.
-.Pp
-The expected form of the string is an optional plus (``+'') or minus
-sign (``\-'') followed by a sequence of digits optionally containing
-a decimal-point character, optionally followed by an exponent.
-An exponent consists of an ``E'' or ``e'', followed by an optional plus
-or minus sign, followed by a sequence of digits.
-.Pp
-Leading white-space characters in the string (as defined by the
+.Vt double ,
+.Vt float ,
+and
+.Vt "long double"
+representation, respectively.
+.Pp
+The expected form of the string
+is an optional plus (``+'') or minus (``\-'') sign,
+followed by either:
+.Bl -bullet
+.It
+a decimal significand, consisting of a sequence of decimal digits
+(optionally containing a decimal-point character) or
+.It
+a hexadecimal significand, consisting of a ``0X'' or ``0x'' followed
+by a sequence of hexadecimal digits
+(optionally containing a decimal-point character).
+.El
+.Pp
+In both cases, the significand may be optionally followed by an
+exponent.
+An exponent consists of an ``E'' or ``e'' (for decimal
+constants) or a ``P'' or ``p'' (for hexadecimal constants),
+followed by an optional plus or minus sign, followed by a
+sequence of decimal digits.
+For decimal constants, the exponent indicates the power of 10 by
+which the significand should be scaled.
+For hexadecimal constants, the scaling is instead done by powers
+of 2.
+.Pp
+Alternatively, if the portion of the string following the optional
+plus or minus sign begins with
+.Dq INFINITY
+or
+.Dq NAN ,
+ignoring case, it is interpreted as an infinity or a quiet \*(Na,
+respectively.
+The syntax
+.Dq Xo Pf NAN( Ar "s" ) Xc ,
+where
+.Ar s
+is an alphanumeric string, produces the same value as the call
+.Fo nan
+.Qq Ar s Ns
+.Fc
+(respectively,
+.Fo nanf
+.Qq Ar s Ns
+.Fc
+and
+.Fo nanl
+.Qq Ar s Ns
+.Fc . )
+.Pp
+In any of the above cases, leading white-space characters in the
+string (as defined by the
 .Xr isspace 3
 function) are skipped.
 The decimal point
 character is defined in the program's locale (category
 .Dv LC_NUMERIC ) .
+.Pp
+Extended locale versions of these functions are documented in
+.Xr strtod_l 3 .
+See
+.Xr xlocale 3
+for more information.
 .Sh RETURN VALUES
 The
-.Fn strtod
-function returns the converted value, if any.
+.Fn strtod ,
+.Fn strtof ,
+and
+.Fn strtold
+functions return the converted value, if any.
 .Pp
 If
 .Fa endptr
@@ -91,8 +154,11 @@
 .Fa endptr .
 .Pp
 If the correct value would cause overflow, plus or minus
-.Dv HUGE_VAL
-is returned (according to the sign of the value), and
+.Dv HUGE_VAL ,
+.Dv HUGE_VALF ,
+or
+.Dv HUGE_VALL
+is returned (according to the sign and type of the return value), and
 .Er ERANGE
 is stored in
 .Va errno .
@@ -110,31 +176,41 @@
 .Xr atof 3 ,
 .Xr atoi 3 ,
 .Xr atol 3 ,
+.Xr nan 3 ,
+.Xr strtod_l 3 ,
 .Xr strtol 3 ,
-.Xr strtoul 3
+.Xr strtoul 3 ,
+.Xr wcstod 3
 .Sh STANDARDS
 The
 .Fn strtod
 function
 conforms to
-.St -isoC .
+.St -isoC-99 .
 .Sh AUTHORS
 The author of this software is
 .An David M. Gay .
 .Pp
-Copyright (c) 1991 by AT&T.
-.Pp
-Permission to use, copy, modify, and distribute this software for any
-purpose without fee is hereby granted, provided that this entire notice
-is included in all copies of any software which is or includes a copy
-or modification of this software and in all copies of the supporting
-documentation for such software.
-.Pp
-THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
-WARRANTY.  IN PARTICULAR, NEITHER THE AUTHOR NOR AT&T MAKES ANY
-REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
-OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
-.Pp
-Contact your vendor for a free copy of the source code to
-.Fn strtod
-and accompanying functions.
+.Bd -literal
+Copyright (c) 1998 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+.Ed