Improve markup of sscanf and swscanf documentation
- use bullet points to separate width, size and type sections, rather than using rows in an enormous table, for consistency with sprintf and swprintf. - use code markup for size bullet point for consistency - use a texinfo multitable for description of the size flags, rather than some preformatted text - tidy up some whitespace so type flags are all aligned 2015-11-12 Jon Turney <jon.turney@dronecode.org.uk> * libc/stdio/sscanf.c: Improve documentation markup. * libc/stdio/swscanf.c: Ditto. Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
This commit is contained in:
Jon Turney
parent
396e8310b1
commit
21e6ba20ae
|
|
@ -1,3 +1,8 @@
|
|||
2015-11-12 Jon Turney <jon.turney@dronecode.org.uk>
|
||||
|
||||
* libc/stdio/sscanf.c: Improve documentation markup.
|
||||
* libc/stdio/swscanf.c: Ditto.
|
||||
|
||||
2015-11-17 Yaakov Selkowitz <yselkowi@redhat.com>
|
||||
|
||||
* libc/include/stdlib.h (rpmatch): Declare.
|
||||
|
|
|
|||
|
|
@ -132,12 +132,14 @@ DESCRIPTION
|
|||
|
||||
Each format specification begins with the percent character (<<%>>).
|
||||
The other fields are:
|
||||
o+
|
||||
O+
|
||||
o *
|
||||
|
||||
an optional marker; if present, it suppresses interpretation and
|
||||
assignment of this input field.
|
||||
|
||||
o <[width]>
|
||||
|
||||
an optional maximum field width: a decimal integer,
|
||||
which controls the maximum number of characters that
|
||||
will be read before converting the current input field. If the
|
||||
|
|
@ -150,58 +152,115 @@ DESCRIPTION
|
|||
to that character are read, converted, and stored.
|
||||
Then <<scanf>> proceeds to the next format specification.
|
||||
|
||||
o size
|
||||
o <[size]>
|
||||
|
||||
<<h>>, <<j>>, <<l>>, <<L>>, <<t>>, and <<z>> are optional size
|
||||
characters which override the default way that <<scanf>>
|
||||
interprets the data type of the corresponding argument.
|
||||
|
||||
|
||||
.Modifier Type(s)
|
||||
. hh d, i, o, u, x, n convert input to char,
|
||||
. store in char object
|
||||
.
|
||||
. h d, i, o, u, x, n convert input to short,
|
||||
. store in short object
|
||||
.
|
||||
. h D, I, O, U, X no effect
|
||||
. e, f, c, s, p
|
||||
.
|
||||
. j d, i, o, u, x, n convert input to intmax_t,
|
||||
. store in intmax_t object
|
||||
.
|
||||
. j all others no effect
|
||||
.
|
||||
. l d, i, o, u, x, n convert input to long,
|
||||
. store in long object
|
||||
.
|
||||
. l e, f, g convert input to double
|
||||
. store in a double object
|
||||
.
|
||||
. l D, I, O, U, X no effect
|
||||
. c, s, p
|
||||
.
|
||||
. ll d, i, o, u, x, n convert to long long,
|
||||
. store in long long
|
||||
.
|
||||
. L d, i, o, u, x, n convert to long long,
|
||||
. store in long long
|
||||
.
|
||||
. L e, f, g, E, G convert to long double,
|
||||
. store in long double
|
||||
.
|
||||
. L all others no effect
|
||||
.
|
||||
. t d, i, o, u, x, n convert input to ptrdiff_t,
|
||||
. store in ptrdiff_t object
|
||||
.
|
||||
. t all others no effect
|
||||
.
|
||||
. z d, i, o, u, x, n convert input to size_t,
|
||||
. store in size_t object
|
||||
.
|
||||
. z all others no effect
|
||||
.
|
||||
|
||||
@multitable @columnfractions 0.18 0.30 0.52
|
||||
@headitem
|
||||
Modifier
|
||||
@tab
|
||||
Type(s)
|
||||
@tab
|
||||
@item
|
||||
hh
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to char, store in char object
|
||||
@item
|
||||
h
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to short, store in short object
|
||||
@item
|
||||
h
|
||||
@tab
|
||||
D, I, O, U, X, e, f, c, s, p
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
j
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to intmax_t, store in intmax_t object
|
||||
@item
|
||||
j
|
||||
@tab
|
||||
all others
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
l
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to long, store in long object
|
||||
@item
|
||||
l
|
||||
@tab
|
||||
e, f, g
|
||||
@tab
|
||||
convert input to double, store in a double object
|
||||
@item
|
||||
l
|
||||
@tab
|
||||
D, I, O, U, X, c, s, p
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
ll
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert to long long, store in long long object
|
||||
@item
|
||||
L
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert to long long, store in long long object
|
||||
@item
|
||||
L
|
||||
@tab
|
||||
e, f, g, E, G
|
||||
@tab
|
||||
convert to long double, store in long double object
|
||||
@item
|
||||
L
|
||||
@tab
|
||||
all others
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
t
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to ptrdiff_t, store in ptrdiff_t object
|
||||
@item
|
||||
t
|
||||
@tab
|
||||
all others
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
z
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to size_t, store in size_t object
|
||||
@item
|
||||
z
|
||||
@tab
|
||||
all others
|
||||
@tab
|
||||
no effect
|
||||
@end multitable
|
||||
|
||||
o <[type]>
|
||||
|
||||
|
|
@ -210,7 +269,7 @@ DESCRIPTION
|
|||
characters:
|
||||
|
||||
o+
|
||||
o %
|
||||
o %
|
||||
No conversion is done; the percent character (<<%>>) is stored.
|
||||
|
||||
o c
|
||||
|
|
@ -220,7 +279,7 @@ DESCRIPTION
|
|||
Reads a character string into the array supplied.
|
||||
Corresponding <[arg]>: <<(char arg[])>>.
|
||||
|
||||
o [<[pattern]>]
|
||||
o [<[pattern]>]
|
||||
Reads a non-empty character string into memory
|
||||
starting at <[arg]>. This area must be large
|
||||
enough to accept the sequence and a
|
||||
|
|
@ -244,7 +303,6 @@ DESCRIPTION
|
|||
o u
|
||||
Reads an unsigned decimal integer into the corresponding
|
||||
<[arg]>: <<(unsigned int *arg)>>.
|
||||
|
||||
|
||||
o U
|
||||
Reads an unsigned decimal integer into the corresponding <[arg]>:
|
||||
|
|
@ -262,19 +320,19 @@ DESCRIPTION
|
|||
Read a floating-point number into the corresponding <[arg]>:
|
||||
<<(double *arg)>>.
|
||||
|
||||
o i
|
||||
o i
|
||||
Reads a decimal, octal or hexadecimal integer into the
|
||||
corresponding <[arg]>: <<(int *arg)>>.
|
||||
|
||||
o I
|
||||
o I
|
||||
Reads a decimal, octal or hexadecimal integer into the
|
||||
corresponding <[arg]>: <<(long *arg)>>.
|
||||
|
||||
o n
|
||||
o n
|
||||
Stores the number of characters read in the corresponding
|
||||
<[arg]>: <<(int *arg)>>.
|
||||
|
||||
o p
|
||||
o p
|
||||
Stores a scanned pointer. ANSI C leaves the details
|
||||
to each implementation; this implementation treats
|
||||
<<%p>> exactly the same as <<%U>>. Corresponding
|
||||
|
|
@ -316,7 +374,7 @@ DESCRIPTION
|
|||
|
||||
where objects inclosed in square brackets are optional, and <<ddd>>
|
||||
represents decimal, octal, or hexadecimal digits.
|
||||
o-
|
||||
O-
|
||||
|
||||
RETURNS
|
||||
<<scanf>> returns the number of input fields successfully
|
||||
|
|
|
|||
|
|
@ -134,12 +134,14 @@ DESCRIPTION
|
|||
|
||||
Each format specification begins with the percent character (<<%>>).
|
||||
The other fields are:
|
||||
o+
|
||||
O+
|
||||
o *
|
||||
|
||||
an optional marker; if present, it suppresses interpretation and
|
||||
assignment of this input field.
|
||||
|
||||
o <[width]>
|
||||
|
||||
an optional maximum field width: a decimal integer,
|
||||
which controls the maximum number of characters that
|
||||
will be read before converting the current input field. If the
|
||||
|
|
@ -152,58 +154,121 @@ DESCRIPTION
|
|||
to that character are read, converted, and stored.
|
||||
Then <<wscanf>> proceeds to the next format specification.
|
||||
|
||||
o size
|
||||
o <[size]>
|
||||
|
||||
<<h>>, <<j>>, <<l>>, <<L>>, <<t>>, and <<z>> are optional size
|
||||
characters which override the default way that <<wscanf>>
|
||||
interprets the data type of the corresponding argument.
|
||||
|
||||
|
||||
.Modifier Type(s)
|
||||
. hh d, i, o, u, x, n convert input to char,
|
||||
. store in char object
|
||||
.
|
||||
. h d, i, o, u, x, n convert input to short,
|
||||
. store in short object
|
||||
.
|
||||
. h e, f, c, s, p no effect
|
||||
.
|
||||
. j d, i, o, u, x, n convert input to intmax_t,
|
||||
. store in intmax_t object
|
||||
.
|
||||
. j all others no effect
|
||||
.
|
||||
. l d, i, o, u, x, n convert input to long,
|
||||
. store in long object
|
||||
.
|
||||
. l e, f, g convert input to double
|
||||
. store in a double object
|
||||
.
|
||||
. l c, s, [ the input is stored in a wchar_t object
|
||||
.
|
||||
. l p no effect
|
||||
.
|
||||
. ll d, i, o, u, x, n convert to long long,
|
||||
. store in long long
|
||||
.
|
||||
. L d, i, o, u, x, n convert to long long,
|
||||
. store in long long
|
||||
.
|
||||
. L e, f, g, E, G convert to long double,
|
||||
. store in long double
|
||||
.
|
||||
. L all others no effect
|
||||
.
|
||||
. t d, i, o, u, x, n convert input to ptrdiff_t,
|
||||
. store in ptrdiff_t object
|
||||
.
|
||||
. t all others no effect
|
||||
.
|
||||
. z d, i, o, u, x, n convert input to size_t,
|
||||
. store in size_t object
|
||||
.
|
||||
. z all others no effect
|
||||
.
|
||||
|
||||
@multitable @columnfractions 0.18 0.30 0.52
|
||||
@headitem
|
||||
Modifier
|
||||
@tab
|
||||
Type(s)
|
||||
@tab
|
||||
@item
|
||||
hh
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to char, store in char object
|
||||
@item
|
||||
h
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to short, store in short object
|
||||
@item
|
||||
h
|
||||
@tab
|
||||
e, f, c, s, p
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
j
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to intmax_t, store in intmax_t object
|
||||
@item
|
||||
j
|
||||
@tab
|
||||
all others
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
l
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to long, store in long object
|
||||
@item
|
||||
l
|
||||
@tab
|
||||
e, f, g
|
||||
@tab
|
||||
convert input to double, store in a double object
|
||||
@item
|
||||
l
|
||||
@tab
|
||||
c, s, [
|
||||
@tab
|
||||
the input is stored in a wchar_t object
|
||||
@item
|
||||
l
|
||||
@tab
|
||||
p
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
ll
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert to long long, store in long long object
|
||||
@item
|
||||
L
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert to long long, store in long long object
|
||||
@item
|
||||
L
|
||||
@tab
|
||||
e, f, g, E, G
|
||||
@tab
|
||||
convert to long double, store in long double object
|
||||
@item
|
||||
L
|
||||
@tab
|
||||
all others
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
t
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to ptrdiff_t, store in ptrdiff_t object
|
||||
@item
|
||||
t
|
||||
@tab
|
||||
all others
|
||||
@tab
|
||||
no effect
|
||||
@item
|
||||
z
|
||||
@tab
|
||||
d, i, o, u, x, n
|
||||
@tab
|
||||
convert input to size_t, store in size_t object
|
||||
@item
|
||||
z
|
||||
@tab
|
||||
all others
|
||||
@tab
|
||||
no effect
|
||||
@end multitable
|
||||
|
||||
o <[type]>
|
||||
|
||||
|
|
@ -212,7 +277,7 @@ DESCRIPTION
|
|||
characters:
|
||||
|
||||
o+
|
||||
o %
|
||||
o %
|
||||
No conversion is done; the percent character (<<%>>) is stored.
|
||||
|
||||
o c
|
||||
|
|
@ -225,7 +290,7 @@ DESCRIPTION
|
|||
Corresponding <[arg]>: <<(char arg[])>>.
|
||||
If an <<l>> specifier is present, the corresponding <[arg]> is a <<(wchar_t *arg)>>.
|
||||
|
||||
o [<[pattern]>]
|
||||
o [<[pattern]>]
|
||||
Reads a non-empty character string into memory
|
||||
starting at <[arg]>. This area must be large
|
||||
enough to accept the sequence and a
|
||||
|
|
@ -244,7 +309,7 @@ DESCRIPTION
|
|||
o u
|
||||
Reads an unsigned decimal integer into the corresponding
|
||||
<[arg]>: <<(unsigned int *arg)>>.
|
||||
|
||||
|
||||
o x,X
|
||||
Read a hexadecimal integer into the corresponding <[arg]>:
|
||||
<<(int *arg)>>.
|
||||
|
|
@ -257,19 +322,19 @@ DESCRIPTION
|
|||
Read a floating-point number into the corresponding <[arg]>:
|
||||
<<(double *arg)>>.
|
||||
|
||||
o i
|
||||
o i
|
||||
Reads a decimal, octal or hexadecimal integer into the
|
||||
corresponding <[arg]>: <<(int *arg)>>.
|
||||
|
||||
o n
|
||||
o n
|
||||
Stores the number of characters read in the corresponding
|
||||
<[arg]>: <<(int *arg)>>.
|
||||
|
||||
o p
|
||||
o p
|
||||
Stores a scanned pointer. ANSI C leaves the details
|
||||
to each implementation; this implementation treats
|
||||
<<%p>> exactly the same as <<%U>>. Corresponding
|
||||
<[arg]>: <<(void **arg)>>.
|
||||
<[arg]>: <<(void **arg)>>.
|
||||
o-
|
||||
|
||||
A <[pattern]> of characters surrounded by square brackets can be used
|
||||
|
|
@ -303,7 +368,7 @@ DESCRIPTION
|
|||
|
||||
where objects inclosed in square brackets are optional, and <<ddd>>
|
||||
represents decimal, octal, or hexadecimal digits.
|
||||
o-
|
||||
O-
|
||||
|
||||
RETURNS
|
||||
<<wscanf>> returns the number of input fields successfully
|
||||
|
|
|
|||
Loading…
Reference in New Issue