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utf8_and_win.c
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1 /*-------------------------------------------------------------------------
2  *
3  * WIN <--> UTF8
4  *
5  * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
6  * Portions Copyright (c) 1994, Regents of the University of California
7  *
8  * IDENTIFICATION
9  * src/backend/utils/mb/conversion_procs/utf8_and_win/utf8_and_win.c
10  *
11  *-------------------------------------------------------------------------
12  */
13 
14 #include "postgres.h"
15 #include "fmgr.h"
16 #include "mb/pg_wchar.h"
17 #include "../../Unicode/utf8_to_win1250.map"
18 #include "../../Unicode/utf8_to_win1251.map"
19 #include "../../Unicode/utf8_to_win1252.map"
20 #include "../../Unicode/utf8_to_win1253.map"
21 #include "../../Unicode/utf8_to_win1254.map"
22 #include "../../Unicode/utf8_to_win1255.map"
23 #include "../../Unicode/utf8_to_win1256.map"
24 #include "../../Unicode/utf8_to_win1257.map"
25 #include "../../Unicode/utf8_to_win1258.map"
26 #include "../../Unicode/utf8_to_win866.map"
27 #include "../../Unicode/utf8_to_win874.map"
28 #include "../../Unicode/win1250_to_utf8.map"
29 #include "../../Unicode/win1251_to_utf8.map"
30 #include "../../Unicode/win1252_to_utf8.map"
31 #include "../../Unicode/win1253_to_utf8.map"
32 #include "../../Unicode/win1254_to_utf8.map"
33 #include "../../Unicode/win1255_to_utf8.map"
34 #include "../../Unicode/win1256_to_utf8.map"
35 #include "../../Unicode/win1257_to_utf8.map"
36 #include "../../Unicode/win866_to_utf8.map"
37 #include "../../Unicode/win874_to_utf8.map"
38 #include "../../Unicode/win1258_to_utf8.map"
39 
41 
44 
45 /* ----------
46  * conv_proc(
47  * INTEGER, -- source encoding id
48  * INTEGER, -- destination encoding id
49  * CSTRING, -- source string (null terminated C string)
50  * CSTRING, -- destination string (null terminated C string)
51  * INTEGER -- source string length
52  * ) returns VOID;
53  * ----------
54  */
55 
56 typedef struct
57 {
59  const pg_mb_radix_tree *map1; /* to UTF8 map name */
60  const pg_mb_radix_tree *map2; /* from UTF8 map name */
61 } pg_conv_map;
62 
63 static const pg_conv_map maps[] = {
64  {PG_WIN866, &win866_to_unicode_tree, &win866_from_unicode_tree},
65  {PG_WIN874, &win874_to_unicode_tree, &win874_from_unicode_tree},
66  {PG_WIN1250, &win1250_to_unicode_tree, &win1250_from_unicode_tree},
67  {PG_WIN1251, &win1251_to_unicode_tree, &win1251_from_unicode_tree},
68  {PG_WIN1252, &win1252_to_unicode_tree, &win1252_from_unicode_tree},
69  {PG_WIN1253, &win1253_to_unicode_tree, &win1253_from_unicode_tree},
70  {PG_WIN1254, &win1254_to_unicode_tree, &win1254_from_unicode_tree},
71  {PG_WIN1255, &win1255_to_unicode_tree, &win1255_from_unicode_tree},
72  {PG_WIN1256, &win1256_to_unicode_tree, &win1256_from_unicode_tree},
73  {PG_WIN1257, &win1257_to_unicode_tree, &win1257_from_unicode_tree},
74  {PG_WIN1258, &win1258_to_unicode_tree, &win1258_from_unicode_tree},
75 };
76 
77 Datum
79 {
80  int encoding = PG_GETARG_INT32(0);
81  unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
82  unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
83  int len = PG_GETARG_INT32(4);
84  int i;
85 
87 
88  for (i = 0; i < lengthof(maps); i++)
89  {
90  if (encoding == maps[i].encoding)
91  {
92  LocalToUtf(src, len, dest,
93  maps[i].map1,
94  NULL, 0,
95  NULL,
96  encoding);
98  }
99  }
100 
101  ereport(ERROR,
102  (errcode(ERRCODE_INTERNAL_ERROR),
103  errmsg("unexpected encoding ID %d for WIN character sets",
104  encoding)));
105 
106  PG_RETURN_VOID();
107 }
108 
109 Datum
111 {
112  int encoding = PG_GETARG_INT32(1);
113  unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
114  unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
115  int len = PG_GETARG_INT32(4);
116  int i;
117 
119 
120  for (i = 0; i < lengthof(maps); i++)
121  {
122  if (encoding == maps[i].encoding)
123  {
124  UtfToLocal(src, len, dest,
125  maps[i].map2,
126  NULL, 0,
127  NULL,
128  encoding);
129  PG_RETURN_VOID();
130  }
131  }
132 
133  ereport(ERROR,
134  (errcode(ERRCODE_INTERNAL_ERROR),
135  errmsg("unexpected encoding ID %d for WIN character sets",
136  encoding)));
137 
138  PG_RETURN_VOID();
139 }
void UtfToLocal(const unsigned char *utf, int len, unsigned char *iso, const pg_mb_radix_tree *map, const pg_utf_to_local_combined *cmap, int cmapsize, utf_local_conversion_func conv_func, int encoding)
Definition: conv.c:474
#define PG_GETARG_INT32(n)
Definition: fmgr.h:234
Datum utf8_to_win(PG_FUNCTION_ARGS)
Definition: utf8_and_win.c:110
int errcode(int sqlerrcode)
Definition: elog.c:575
#define lengthof(array)
Definition: c.h:562
PG_MODULE_MAGIC
Definition: utf8_and_win.c:40
Datum win_to_utf8(PG_FUNCTION_ARGS)
Definition: utf8_and_win.c:78
PG_FUNCTION_INFO_V1(win_to_utf8)
#define ERROR
Definition: elog.h:43
void LocalToUtf(const unsigned char *iso, int len, unsigned char *utf, const pg_mb_radix_tree *map, const pg_local_to_utf_combined *cmap, int cmapsize, utf_local_conversion_func conv_func, int encoding)
Definition: conv.c:666
static const pg_conv_map maps[]
Definition: utf8_and_win.c:63
#define ereport(elevel, rest)
Definition: elog.h:122
uintptr_t Datum
Definition: postgres.h:372
static char * encoding
Definition: initdb.c:122
#define PG_RETURN_VOID()
Definition: fmgr.h:309
#define NULL
Definition: c.h:229
#define CHECK_ENCODING_CONVERSION_ARGS(srcencoding, destencoding)
Definition: pg_wchar.h:490
pg_enc
Definition: pg_wchar.h:236
int errmsg(const char *fmt,...)
Definition: elog.c:797
int i
#define PG_GETARG_CSTRING(n)
Definition: fmgr.h:242
#define PG_FUNCTION_ARGS
Definition: fmgr.h:158