1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/*-------------------------------------------------------------------------
*
* BIG5 <--> UTF8
*
* Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/backend/utils/mb/conversion_procs/utf8_and_big5/utf8_and_big5.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "fmgr.h"
#include "mb/pg_wchar.h"
#include "../../Unicode/big5_to_utf8.map"
#include "../../Unicode/utf8_to_big5.map"
PG_MODULE_MAGIC;
PG_FUNCTION_INFO_V1(big5_to_utf8);
PG_FUNCTION_INFO_V1(utf8_to_big5);
/* ----------
* conv_proc(
* INTEGER, -- source encoding id
* INTEGER, -- destination encoding id
* CSTRING, -- source string (null terminated C string)
* CSTRING, -- destination string (null terminated C string)
* INTEGER, -- source string length
* BOOL -- if true, don't throw an error if conversion fails
* ) returns INTEGER;
*
* Returns the number of bytes successfully converted.
* ----------
*/
Datum
big5_to_utf8(PG_FUNCTION_ARGS)
{
unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
int len = PG_GETARG_INT32(4);
bool noError = PG_GETARG_BOOL(5);
int converted;
CHECK_ENCODING_CONVERSION_ARGS(PG_BIG5, PG_UTF8);
converted = LocalToUtf(src, len, dest,
&big5_to_unicode_tree,
NULL, 0,
NULL,
PG_BIG5,
noError);
PG_RETURN_INT32(converted);
}
Datum
utf8_to_big5(PG_FUNCTION_ARGS)
{
unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
int len = PG_GETARG_INT32(4);
bool noError = PG_GETARG_BOOL(5);
int converted;
CHECK_ENCODING_CONVERSION_ARGS(PG_UTF8, PG_BIG5);
converted = UtfToLocal(src, len, dest,
&big5_from_unicode_tree,
NULL, 0,
NULL,
PG_BIG5,
noError);
PG_RETURN_INT32(converted);
}
|