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体验新版 GitCode,发现更多精彩内容 >>
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5f8e0ddc
编写于
2月 08, 2012
作者:
B
Brian Anderson
浏览文件
操作
浏览文件
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差异文件
Merge pull request #1783 from erickt/master
Adding a str::as_bytes<T>(str, fn([u8] -> T) -> T function
上级
526e73d7
3a413aab
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
31 addition
and
20 deletion
+31
-20
src/libcore/str.rs
src/libcore/str.rs
+31
-20
未找到文件。
src/libcore/str.rs
浏览文件 @
5f8e0ddc
...
...
@@ -95,6 +95,7 @@
char_at
,
substr_all
,
escape_char
,
as_bytes
,
as_buf
,
//buf,
sbuf
,
...
...
@@ -390,10 +391,7 @@ fn trim(s: str) -> str { trim_left(trim_right(s)) }
null-terminated.
*/
fn
bytes
(
s
:
str
)
->
[
u8
]
unsafe
{
let
v
=
::
unsafe
::
reinterpret_cast
(
s
);
let
vcopy
=
vec
::
slice
(
v
,
0u
,
vec
::
len
(
v
)
-
1u
);
::
unsafe
::
leak
(
v
);
ret
vcopy
;
as_bytes
(
s
)
{
|
v
|
vec
::
slice
(
v
,
0u
,
vec
::
len
(
v
)
-
1u
)
}
}
/*
...
...
@@ -1026,12 +1024,12 @@ fn is_whitespace(s: str) -> bool {
FIXME: rename to 'len_bytes'
*/
pure
fn
byte_len
(
s
:
str
)
->
uint
unsafe
{
let
v
:
[
u8
]
=
::
unsafe
::
reinterpret_cast
(
s
);
let
vlen
=
vec
::
len
(
v
);
::
unsafe
::
leak
(
v
);
// There should always be a null terminator
assert
(
vlen
>
0u
);
ret
vlen
-
1u
;
as_bytes
(
s
)
{
|
v
|
let
vlen
=
vec
::
len
(
v
);
// There should always be a null terminator
assert
(
vlen
>
0u
);
vlen
-
1u
}
}
/*
...
...
@@ -1299,23 +1297,38 @@ fn escape_char(c: char) -> str {
const
tag_six_b
:
uint
=
252u
;
/*
Function: as_b
uf
Function: as_b
ytes
Work with the byte buffer of a string. Allows for unsafe manipulation
of strings, which is useful for native interop.
Example:
> let
s = str::as_buf("PATH", { |path_buf| libc::getenv(path_buf) })
;
> let
i = str::as_bytes("Hello World") { |bytes| vec::len(bytes) }
;
*/
fn
as_b
uf
<
T
>
(
s
:
str
,
f
:
fn
(
sbuf
)
->
T
)
->
T
unsafe
{
fn
as_b
ytes
<
T
>
(
s
:
str
,
f
:
fn
([
u8
]
)
->
T
)
->
T
unsafe
{
let
v
:
[
u8
]
=
::
unsafe
::
reinterpret_cast
(
s
);
let
r
=
vec
::
as_buf
(
v
,
f
);
let
r
=
f
(
v
);
::
unsafe
::
leak
(
v
);
r
}
/*
Function: as_buf
Work with the byte buffer of a string. Allows for unsafe manipulation
of strings, which is useful for native interop.
Example:
> let s = str::as_buf("PATH", { |path_buf| libc::getenv(path_buf) });
*/
fn
as_buf
<
T
>
(
s
:
str
,
f
:
fn
(
sbuf
)
->
T
)
->
T
unsafe
{
as_bytes
(
s
)
{
|
v
|
vec
::
as_buf
(
v
,
f
)
}
}
/*
Type: sbuf
...
...
@@ -1373,13 +1386,11 @@ unsafe fn slice_bytes(s: str, begin: uint, end: uint) -> str unsafe {
assert
(
begin
<=
end
);
assert
(
end
<=
byte_len
(
s
));
let
v
:
[
u8
]
=
::
unsafe
::
reinterpret_cast
(
s
);
let
v2
=
vec
::
slice
(
v
,
begin
,
end
);
let
v
=
as_bytes
(
s
)
{
|
v
|
vec
::
slice
(
v
,
begin
,
end
)
};
v
+=
[
0u8
];
let
s
:
str
=
::
unsafe
::
reinterpret_cast
(
v
);
::
unsafe
::
leak
(
v
);
v2
+=
[
0u8
];
let
s2
:
str
=
::
unsafe
::
reinterpret_cast
(
v2
);
::
unsafe
::
leak
(
v2
);
ret
s2
;
ret
s
;
}
/*
...
...
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