29
Input/output library
[input.output]
29.11
File systems
[filesystems]
29.11.13
Filesystem operation functions
[fs.op.funcs]
29.11.13.15
File size
[fs.op.file.size]
🔗
uintmax_t file_size
(
const
path
&
p
)
; uintmax_t file_size
(
const
path
&
p, error_code
&
ec
)
noexcept
;
1
#
Effects
: If
exists
(
p
)
is
false
, an error is reported (
[fs.
err.
report]
)
.
2
#
Returns
:
(2.1)
If
is_regular_file
(
p
)
, the size in bytes of the file
p
resolves to, determined as if by the value of the POSIX
stat
class member
st_size
obtained as if by POSIX
stat
(
)
.
(2.2)
Otherwise, the result is
implementation-defined
.
The signature with argument
ec
returns
static_cast
<
uintmax_t
>
(
-
1
)
if an error occurs
.
3
#
Throws
: As specified in
[fs.
err.
report]
.