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/*-------------------------------------------------------------------------
*
* WIN <--> UTF8
*
* Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/backend/utils/mb/conversion_procs/utf8_and_win/utf8_and_win.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "fmgr.h"
#include "mb/pg_wchar.h"
#include "../../Unicode/utf8_to_win1250.map"
#include "../../Unicode/utf8_to_win1251.map"
#include "../../Unicode/utf8_to_win1252.map"
#include "../../Unicode/utf8_to_win1253.map"
#include "../../Unicode/utf8_to_win1254.map"
#include "../../Unicode/utf8_to_win1255.map"
#include "../../Unicode/utf8_to_win1256.map"
#include "../../Unicode/utf8_to_win1257.map"
#include "../../Unicode/utf8_to_win1258.map"
#include "../../Unicode/utf8_to_win866.map"
#include "../../Unicode/utf8_to_win874.map"
#include "../../Unicode/win1250_to_utf8.map"
#include "../../Unicode/win1251_to_utf8.map"
#include "../../Unicode/win1252_to_utf8.map"
#include "../../Unicode/win1253_to_utf8.map"
#include "../../Unicode/win1254_to_utf8.map"
#include "../../Unicode/win1255_to_utf8.map"
#include "../../Unicode/win1256_to_utf8.map"
#include "../../Unicode/win1257_to_utf8.map"
#include "../../Unicode/win866_to_utf8.map"
#include "../../Unicode/win874_to_utf8.map"
#include "../../Unicode/win1258_to_utf8.map"
PG_MODULE_MAGIC_EXT(
.name = "utf8_and_win",
.version = PG_VERSION
);
PG_FUNCTION_INFO_V1(win_to_utf8);
PG_FUNCTION_INFO_V1(utf8_to_win);
/* ----------
* 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.
* ----------
*/
typedef struct
{
pg_enc encoding;
const pg_mb_radix_tree *map1; /* to UTF8 map name */
const pg_mb_radix_tree *map2; /* from UTF8 map name */
} pg_conv_map;
static const pg_conv_map maps[] = {
{PG_WIN866, &win866_to_unicode_tree, &win866_from_unicode_tree},
{PG_WIN874, &win874_to_unicode_tree, &win874_from_unicode_tree},
{PG_WIN1250, &win1250_to_unicode_tree, &win1250_from_unicode_tree},
{PG_WIN1251, &win1251_to_unicode_tree, &win1251_from_unicode_tree},
{PG_WIN1252, &win1252_to_unicode_tree, &win1252_from_unicode_tree},
{PG_WIN1253, &win1253_to_unicode_tree, &win1253_from_unicode_tree},
{PG_WIN1254, &win1254_to_unicode_tree, &win1254_from_unicode_tree},
{PG_WIN1255, &win1255_to_unicode_tree, &win1255_from_unicode_tree},
{PG_WIN1256, &win1256_to_unicode_tree, &win1256_from_unicode_tree},
{PG_WIN1257, &win1257_to_unicode_tree, &win1257_from_unicode_tree},
{PG_WIN1258, &win1258_to_unicode_tree, &win1258_from_unicode_tree},
};
Datum
win_to_utf8(PG_FUNCTION_ARGS)
{
int encoding = PG_GETARG_INT32(0);
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 i;
CHECK_ENCODING_CONVERSION_ARGS(-1, PG_UTF8);
for (i = 0; i < lengthof(maps); i++)
{
if (encoding == maps[i].encoding)
{
int converted;
converted = LocalToUtf(src, len, dest,
maps[i].map1,
NULL, 0,
NULL,
encoding,
noError);
PG_RETURN_INT32(converted);
}
}
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("unexpected encoding ID %d for WIN character sets",
encoding)));
PG_RETURN_INT32(0);
}
Datum
utf8_to_win(PG_FUNCTION_ARGS)
{
int encoding = PG_GETARG_INT32(1);
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 i;
CHECK_ENCODING_CONVERSION_ARGS(PG_UTF8, -1);
for (i = 0; i < lengthof(maps); i++)
{
if (encoding == maps[i].encoding)
{
int converted;
converted = UtfToLocal(src, len, dest,
maps[i].map2,
NULL, 0,
NULL,
encoding,
noError);
PG_RETURN_INT32(converted);
}
}
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("unexpected encoding ID %d for WIN character sets",
encoding)));
PG_RETURN_INT32(0);
}
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