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/*-------------------------------------------------------------------------
*
* GB18030 <--> UTF8
*
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/mb/conversion_procs/utf8_and_gb18030/utf8_and_gb18030.c,v 1.11 2005/09/24 17:53:23 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "fmgr.h"
#include "mb/pg_wchar.h"
#include "../../Unicode/gb18030_to_utf8.map"
#include "../../Unicode/utf8_to_gb18030.map"
PG_FUNCTION_INFO_V1(gb18030_to_utf8);
PG_FUNCTION_INFO_V1(utf8_to_gb18030);
extern Datum gb18030_to_utf8(PG_FUNCTION_ARGS);
extern Datum utf8_to_gb18030(PG_FUNCTION_ARGS);
/* ----------
* 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
* ) returns VOID;
* ----------
*/
Datum
gb18030_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);
Assert(PG_GETARG_INT32(0) == PG_GB18030);
Assert(PG_GETARG_INT32(1) == PG_UTF8);
Assert(len >= 0);
LocalToUtf(src, dest, LUmapGB18030,
sizeof(LUmapGB18030) / sizeof(pg_local_to_utf), PG_GB18030, len);
PG_RETURN_VOID();
}
Datum
utf8_to_gb18030(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);
Assert(PG_GETARG_INT32(0) == PG_UTF8);
Assert(PG_GETARG_INT32(1) == PG_GB18030);
Assert(len >= 0);
UtfToLocal(src, dest, ULmapGB18030,
sizeof(ULmapGB18030) / sizeof(pg_utf_to_local), len);
PG_RETURN_VOID();
}
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