diff options
| author | kleink <kleink@NetBSD.org> | 2002-01-28 00:10:04 +0000 |
|---|---|---|
| committer | kleink <kleink@NetBSD.org> | 2002-01-28 00:10:04 +0000 |
| commit | f100d16fcf17c795a4fa1f93eee4d2a9fec3dfde (patch) | |
| tree | c69abd1153721d41dcc45c06ad688933ba9c2d9b /lib/libc/stdlib/strtod.3 | |
| parent | 8e6a975576292265de484038ecfed0af52494706 (diff) | |
C99: support INF, INFINITY, NAN and NAN(n-char-sequence-opt) arguments.
Diffstat (limited to 'lib/libc/stdlib/strtod.3')
| -rw-r--r-- | lib/libc/stdlib/strtod.3 | 42 |
1 files changed, 39 insertions, 3 deletions
diff --git a/lib/libc/stdlib/strtod.3 b/lib/libc/stdlib/strtod.3 index 5a9b3628a99..cc7cad9a33b 100644 --- a/lib/libc/stdlib/strtod.3 +++ b/lib/libc/stdlib/strtod.3 @@ -1,4 +1,4 @@ -.\" $NetBSD: strtod.3,v 1.10 2001/09/16 01:31:53 wiz Exp $ +.\" $NetBSD: strtod.3,v 1.11 2002/01/28 00:10:04 kleink Exp $ .\" .\" Copyright (c) 1990, 1991, 1993 .\" The Regents of the University of California. All rights reserved. @@ -37,7 +37,7 @@ .\" .\" from: @(#)strtod.3 8.1 (Berkeley) 6/4/93 .\" -.Dd March 21, 2001 +.Dd January 28, 2002 .Dt STRTOD 3 .Os .Sh NAME @@ -62,10 +62,27 @@ to representation. .Pp The expected form of the string is an optional plus (``+'') or minus -sign (``\-'') followed by a sequence of digits optionally containing +sign (``\-'') followed by one of the following: +.Bl -dash +.It +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. +.It +one of +.Li INF +or +.Li INFINITY , +ignoring case. +.It +one of +.Li NAN +or +.Li NAN(n-char-sequence-opt) , +ignoring case. +This implementation currently does not interpret such a sequence. +.El .Pp Leading white-space characters in the string (as defined by the .Xr isspace 3 @@ -75,6 +92,24 @@ The .Fn strtod function returns the converted value, if any. .Pp +A character sequence +.Li INF +or +.Li INFINITY +is converted to \*(If, +if supported, else to the largest finite floating-point number representable +on the machine (i.e., +.Tn VAX Ns ). +.Pp +A character sequence +.Li NAN +or +.Li NAN(n-char-sequence-opt) +is converted to a quiet \*(Na, if supported, else to a +.Dq reserved operand +for that machine (i.e., +.Tn VAX Ns ). +.Pp If .Fa endptr is not @@ -108,6 +143,7 @@ Overflow or underflow occurred. .Xr atof 3 , .Xr atoi 3 , .Xr atol 3 , +.Xr math 3 , .Xr strtol 3 , .Xr strtoul 3 .Sh STANDARDS |
