diff options
Diffstat (limited to 'manual')
| -rw-r--r-- | manual/arith.texi | 26 | ||||
| -rw-r--r-- | manual/time.texi | 34 |
2 files changed, 42 insertions, 18 deletions
diff --git a/manual/arith.texi b/manual/arith.texi index 1a24beb7ca..11479d618b 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 diff --git a/manual/time.texi b/manual/time.texi index 852df4355b..8d79a25ef1 100644 --- a/manual/time.texi +++ b/manual/time.texi @@ -781,7 +781,7 @@ The preferred date and time representation for the current locale. The century of the year. This is equivalent to the greatest integer not greater than the year divided by 100. -This format is a POSIX.2 extension. +This format is a POSIX.2 extension and also appears in @w{ISO C99}. @item %d The day of the month as a decimal number (range @code{01} through @code{31}). @@ -789,19 +789,19 @@ The day of the month as a decimal number (range @code{01} through @code{31}). @item %D The date using the format @code{%m/%d/%y}. -This format is a POSIX.2 extension. +This format is a POSIX.2 extension and also appears in @w{ISO C99}. @item %e The day of the month like with @code{%d}, but padded with blank (range @code{ 1} through @code{31}). -This format is a POSIX.2 extension. +This format is a POSIX.2 extension and also appears in @w{ISO C99}. @item %F The date using the format @code{%Y-%m-%d}. This is the form specified in the @w{ISO 8601} standard and is the preferred form for all uses. -This format is a @w{ISO C 9X} extension. +This format is a @w{ISO C99} extension. @item %g The year corresponding to the ISO week number, but without the century @@ -809,7 +809,7 @@ The year corresponding to the ISO week number, but without the century as @code{%y}, except that if the ISO week number (see @code{%V}) belongs to the previous or next year, that year is used instead. -This format is a GNU extension. +This format was introduced in @w{ISO C99}. @item %G The year corresponding to the ISO week number. This has the same format @@ -817,13 +817,14 @@ and value as @code{%Y}, except that if the ISO week number (see @code{%V}) belongs to the previous or next year, that year is used instead. -This format is a GNU extension. +This format was introduced in @w{ISO C99} but was previously available +as a GNU extension. @item %h The abbreviated month name according to the current locale. The action is the same as for @code{%b}. -This format is a POSIX.2 extension. +This format is a POSIX.2 extension and also appears in @w{ISO C99}. @item %H The hour as a decimal number, using a 24-hour clock (range @code{00} through @@ -857,7 +858,7 @@ The minute as a decimal number (range @code{00} through @code{59}). @item %n A single @samp{\n} (newline) character. -This format is a POSIX.2 extension. +This format is a POSIX.2 extension and also appears in @w{ISO C99}. @item %p Either @samp{AM} or @samp{PM}, according to the given time value; or the @@ -873,17 +874,19 @@ Either @samp{am} or @samp{pm}, according to the given time value; or the corresponding strings for the current locale, printed in lowercase characters. Noon is treated as @samp{pm} and midnight as @samp{am}. -This format is a GNU extension. +This format was introduced in @w{ISO C99} but was previously available +as a GNU extension. @item %r The complete time using the AM/PM format of the current locale. -This format is a POSIX.2 extension. +This format is a POSIX.2 extension and also appears in @w{ISO C99}. @item %R The hour and minute in decimal numbers using the format @code{%H:%M}. -This format is a GNU extension. +This format was introduced in @w{ISO C99} but was previously available +as a GNU extension. @item %s The number of seconds since the epoch, i.e., since 1970-01-01 00:00:00 UTC. @@ -897,7 +900,7 @@ The seconds as a decimal number (range @code{00} through @code{60}). @item %t A single @samp{\t} (tabulator) character. -This format is a POSIX.2 extension. +This format is a POSIX.2 extension and also appears in @w{ISO C99}. @item %T The time using decimal numbers using the format @code{%H:%M:%S}. @@ -908,7 +911,7 @@ This format is a POSIX.2 extension. The day of the week as a decimal number (range @code{1} through @code{7}), Monday being @code{1}. -This format is a POSIX.2 extension. +This format is a POSIX.2 extension and also appears in @w{ISO C99}. @item %U The week number of the current year as a decimal number (range @code{00} @@ -927,7 +930,7 @@ The week before week @code{01} of a year is the last week (@code{52} or @code{53}) of the previous year even if it contains days from the new year. -This format is a POSIX.2 extension. +This format is a POSIX.2 extension and also appears in @w{ISO C99}. @item %w The day of the week as a decimal number (range @code{0} through @@ -959,7 +962,8 @@ before the year @code{1} are numbered @code{0}, @code{-1}, and so on. @code{-0600} or @code{+0100}), or nothing if no time zone is determinable. -This format is a GNU extension. +This format was introduced in @w{ISO C99} but was previously available +as a GNU extension. A full @w{RFC 822} timestamp is generated by the format @w{@samp{"%a, %d %b %Y %H:%M:%S %z"}} (or the equivalent |