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Third Party Musl
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cfcbea1e
T
Third Party Musl
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体验新版 GitCode,发现更多精彩内容 >>
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cfcbea1e
编写于
2月 21, 2011
作者:
R
Rich Felker
浏览文件
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电子邮件补丁
差异文件
remove sample utf-8 code that's not part of the standard library
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d89c9e8a
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1
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1 changed file
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0 addition
and
47 deletion
+0
-47
src/multibyte/decode.c
src/multibyte/decode.c
+0
-47
未找到文件。
src/multibyte/decode.c
已删除
100644 → 0
浏览文件 @
d89c9e8a
/*
* This code was written by Rich Felker in 2010; no copyright is claimed.
* This code is in the public domain. Attribution is appreciated but
* unnecessary.
*/
#include <stdlib.h>
#include <inttypes.h>
#include <wchar.h>
#include <errno.h>
#include "internal.h"
/* Decodes UTF-8 byte-by-byte. The c argument must be initialized to 0
* to begin decoding; when finished it will contain the Unicode scalar
* value decoded. Return value is 1 if finished, 0 if in-progress, and
* -1 if an invalid sequence was encountered. After an invalid sequence,
* the state (in c) automatically resets to 0 if a continuation byte was
* expected to facilitate a calling idiom of immediately retrying a
* failed decode call after processing the invalid sequence. If the
* second try fails, the byte is invalid as a starter as well.
*
* A trivial usage idiom is:
* while (src<end && (n=decode(dst, *src))>=0) 1[dst+=n]=0, src++;
*/
int
decode
(
unsigned
*
c
,
unsigned
b
)
{
if
(
!*
c
)
{
if
(
b
<
0x80
)
{
*
c
=
b
;
return
1
;
}
else
if
(
b
-
SA
>=
SB
-
SA
)
{
*
c
=
FAILSTATE
;
return
-
1
;
}
*
c
=
bittab
[
b
-
SA
];
return
0
;
}
if
(
OOB
(
*
c
,
b
))
{
*
c
=
0
;
return
-
1
;
}
*
c
=
*
c
<<
6
|
b
-
0x80
;
return
!
(
*
c
&
(
1U
<<
31
));
}
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