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/*-------------------------------------------------------------------------
*
* EUC_KR and MULE_INTERNAL
*
* 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/euc_kr_and_mic/euc_kr_and_mic.c,v 1.9.4.1 2006/05/21 20:06:16 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "fmgr.h"
#include "mb/pg_wchar.h"
PG_FUNCTION_INFO_V1(euc_kr_to_mic);
PG_FUNCTION_INFO_V1(mic_to_euc_kr);
extern Datum euc_kr_to_mic(PG_FUNCTION_ARGS);
extern Datum mic_to_euc_kr(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;
* ----------
*/
static void euc_kr2mic(const unsigned char *euc, unsigned char *p, int len);
static void mic2euc_kr(const unsigned char *mic, unsigned char *p, int len);
Datum
euc_kr_to_mic(PG_FUNCTION_ARGS)
{
unsigned char *src = PG_GETARG_CSTRING(2);
unsigned char *dest = PG_GETARG_CSTRING(3);
int len = PG_GETARG_INT32(4);
Assert(PG_GETARG_INT32(0) == PG_EUC_KR);
Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
Assert(len >= 0);
euc_kr2mic(src, dest, len);
PG_RETURN_VOID();
}
Datum
mic_to_euc_kr(PG_FUNCTION_ARGS)
{
unsigned char *src = PG_GETARG_CSTRING(2);
unsigned char *dest = PG_GETARG_CSTRING(3);
int len = PG_GETARG_INT32(4);
Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
Assert(PG_GETARG_INT32(1) == PG_EUC_KR);
Assert(len >= 0);
mic2euc_kr(src, dest, len);
PG_RETURN_VOID();
}
/*
* EUC_KR ---> MIC
*/
static void
euc_kr2mic(const unsigned char *euc, unsigned char *p, int len)
{
int c1;
int l;
while (len > 0)
{
c1 = *euc;
if (IS_HIGHBIT_SET(c1))
{
l = pg_encoding_verifymb(PG_EUC_KR, (const char *) euc, len);
if (l != 2)
report_invalid_encoding(PG_EUC_KR,
(const char *) euc, len);
*p++ = LC_KS5601;
*p++ = c1;
*p++ = euc[1];
euc += 2;
len -= 2;
}
else
{ /* should be ASCII */
if (c1 == 0)
report_invalid_encoding(PG_EUC_KR,
(const char *) euc, len);
*p++ = c1;
euc++;
len--;
}
}
*p = '\0';
}
/*
* MIC ---> EUC_KR
*/
static void
mic2euc_kr(const unsigned char *mic, unsigned char *p, int len)
{
int c1;
int l;
while (len > 0)
{
c1 = *mic;
if (!IS_HIGHBIT_SET(c1))
{
/* ASCII */
if (c1 == 0)
report_invalid_encoding(PG_MULE_INTERNAL,
(const char *) mic, len);
*p++ = c1;
mic++;
len--;
continue;
}
l = pg_encoding_verifymb(PG_MULE_INTERNAL, (const char *) mic, len);
if (l < 0)
report_invalid_encoding(PG_MULE_INTERNAL,
(const char *) mic, len);
if (c1 == LC_KS5601)
{
*p++ = mic[1];
*p++ = mic[2];
}
else
report_untranslatable_char(PG_MULE_INTERNAL, PG_EUC_KR,
(const char *) mic, len);
mic += l;
len -= l;
}
*p = '\0';
}
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