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utf8_and_win.c
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1 /*-------------------------------------------------------------------------
2  *
3  * WIN <--> UTF8
4  *
5  * Portions Copyright (c) 1996-2021, 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  * BOOL -- if true, don't throw an error if conversion fails
53  * ) returns INTEGER;
54  *
55  * Returns the number of bytes successfully converted.
56  * ----------
57  */
58 
59 typedef struct
60 {
62  const pg_mb_radix_tree *map1; /* to UTF8 map name */
63  const pg_mb_radix_tree *map2; /* from UTF8 map name */
64 } pg_conv_map;
65 
66 static const pg_conv_map maps[] = {
67  {PG_WIN866, &win866_to_unicode_tree, &win866_from_unicode_tree},
68  {PG_WIN874, &win874_to_unicode_tree, &win874_from_unicode_tree},
69  {PG_WIN1250, &win1250_to_unicode_tree, &win1250_from_unicode_tree},
70  {PG_WIN1251, &win1251_to_unicode_tree, &win1251_from_unicode_tree},
71  {PG_WIN1252, &win1252_to_unicode_tree, &win1252_from_unicode_tree},
72  {PG_WIN1253, &win1253_to_unicode_tree, &win1253_from_unicode_tree},
73  {PG_WIN1254, &win1254_to_unicode_tree, &win1254_from_unicode_tree},
74  {PG_WIN1255, &win1255_to_unicode_tree, &win1255_from_unicode_tree},
75  {PG_WIN1256, &win1256_to_unicode_tree, &win1256_from_unicode_tree},
76  {PG_WIN1257, &win1257_to_unicode_tree, &win1257_from_unicode_tree},
77  {PG_WIN1258, &win1258_to_unicode_tree, &win1258_from_unicode_tree},
78 };
79 
80 Datum
82 {
83  int encoding = PG_GETARG_INT32(0);
84  unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
85  unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
86  int len = PG_GETARG_INT32(4);
87  bool noError = PG_GETARG_BOOL(5);
88  int i;
89 
91 
92  for (i = 0; i < lengthof(maps); i++)
93  {
94  if (encoding == maps[i].encoding)
95  {
96  int converted;
97 
98  converted = LocalToUtf(src, len, dest,
99  maps[i].map1,
100  NULL, 0,
101  NULL,
102  encoding,
103  noError);
104  PG_RETURN_INT32(converted);
105  }
106  }
107 
108  ereport(ERROR,
109  (errcode(ERRCODE_INTERNAL_ERROR),
110  errmsg("unexpected encoding ID %d for WIN character sets",
111  encoding)));
112 
113  PG_RETURN_INT32(0);
114 }
115 
116 Datum
118 {
119  int encoding = PG_GETARG_INT32(1);
120  unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
121  unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
122  int len = PG_GETARG_INT32(4);
123  bool noError = PG_GETARG_BOOL(5);
124  int i;
125 
127 
128  for (i = 0; i < lengthof(maps); i++)
129  {
130  if (encoding == maps[i].encoding)
131  {
132  int converted;
133 
134  converted = UtfToLocal(src, len, dest,
135  maps[i].map2,
136  NULL, 0,
137  NULL,
138  encoding,
139  noError);
140  PG_RETURN_INT32(converted);
141  }
142  }
143 
144  ereport(ERROR,
145  (errcode(ERRCODE_INTERNAL_ERROR),
146  errmsg("unexpected encoding ID %d for WIN character sets",
147  encoding)));
148 
149  PG_RETURN_INT32(0);
150 }
#define PG_GETARG_INT32(n)
Definition: fmgr.h:269
#define PG_RETURN_INT32(x)
Definition: fmgr.h:354
int 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, bool noError)
Definition: conv.c:507
Datum utf8_to_win(PG_FUNCTION_ARGS)
Definition: utf8_and_win.c:117
int errcode(int sqlerrcode)
Definition: elog.c:698
#define PG_GETARG_BOOL(n)
Definition: fmgr.h:274
#define lengthof(array)
Definition: c.h:734
PG_MODULE_MAGIC
Definition: utf8_and_win.c:40
Datum win_to_utf8(PG_FUNCTION_ARGS)
Definition: utf8_and_win.c:81
PG_FUNCTION_INFO_V1(win_to_utf8)
#define ERROR
Definition: elog.h:46
static const pg_conv_map maps[]
Definition: utf8_and_win.c:66
uintptr_t Datum
Definition: postgres.h:411
#define ereport(elevel,...)
Definition: elog.h:157
#define CHECK_ENCODING_CONVERSION_ARGS(srcencoding, destencoding)
Definition: pg_wchar.h:527
pg_enc
Definition: pg_wchar.h:238
int32 encoding
Definition: pg_database.h:41
int errmsg(const char *fmt,...)
Definition: elog.c:909
int i
int 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, bool noError)
Definition: conv.c:717
#define PG_GETARG_CSTRING(n)
Definition: fmgr.h:277
#define PG_FUNCTION_ARGS
Definition: fmgr.h:193