diff options
Diffstat (limited to 'manual/arith.texi')
| -rw-r--r-- | manual/arith.texi | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/manual/arith.texi b/manual/arith.texi index 1a24beb..11479d6 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -2101,6 +2101,10 @@ are whitespace is determined by the @code{isspace} function @item An optional plus or minus sign (@samp{+} or @samp{-}). +@item A floating point number in decimal or hexadecimal format. The +decimal format is: +@itemize @minus + @item A nonempty sequence of digits optionally containing a decimal-point character---normally @samp{.}, but it depends on the locale @@ -2110,6 +2114,22 @@ character---normally @samp{.}, but it depends on the locale An optional exponent part, consisting of a character @samp{e} or @samp{E}, an optional sign, and a sequence of digits. +@end itemize + +The hexadecimal format is as follows: +@itemize @minus + +@item +A 0x or 0X followed by a nonempty sequence of hexadecimal digits +optionally containing a decimal-point character---normally @samp{.}, but +it depends on the locale (@pxref{General Numeric}). + +@item +An optional binary-exponent part, consisting of a character @samp{p} or +@samp{P}, an optional sign, and a sequence of digits. + +@end itemize + @item Any remaining characters in the string. If @var{tailptr} is not a null pointer, a pointer to this tail of the string is stored in @@ -2146,10 +2166,10 @@ examining @var{errno} and @var{tailptr}. @end deftypefun @comment stdlib.h -@comment GNU +@comment ISO C @deftypefun float strtof (const char *@var{string}, char **@var{tailptr}) @comment stdlib.h -@comment GNU +@comment ISO C @deftypefunx {long double} strtold (const char *@var{string}, char **@var{tailptr}) These functions are analogous to @code{strtod}, but return @code{float} and @code{long double} values respectively. They report errors in the @@ -2158,7 +2178,7 @@ than @code{strtod}, but has less precision; conversely, @code{strtold} can be much slower but has more precision (on systems where @code{long double} is a separate type). -These functions are GNU extensions. +These functions have been GNU extensions and are new to @w{ISO C 9x}. @end deftypefun @comment stdlib.h |