src/backend/utils/mb/conversion_procs/utf8_and_euc_kr/utf8_and_euc_kr.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  *        EUC_KR <--> UTF8
   4  *
   5  * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
   6  * Portions Copyright (c) 1994, Regents of the University of California
   7  *
   8  * IDENTIFICATION
   9  *        $PostgreSQL: pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_kr/utf8_and_euc_kr.c,v 1.18 2007/11/15 21:14:40 momjian Exp $
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13
  14 #include "postgres.h"
  15 #include "fmgr.h"
  16 #include "mb/pg_wchar.h"
  17 #include "../../Unicode/euc_kr_to_utf8.map"
  18 #include "../../Unicode/utf8_to_euc_kr.map"
  19
  20 PG_MODULE_MAGIC;
  21
  22 PG_FUNCTION_INFO_V1(euc_kr_to_utf8);
  23 PG_FUNCTION_INFO_V1(utf8_to_euc_kr);
  24
  25 extern Datum euc_kr_to_utf8(PG_FUNCTION_ARGS);
  26 extern Datum utf8_to_euc_kr(PG_FUNCTION_ARGS);
  27
  28 /* ----------
  29  * conv_proc(
  30  *              INTEGER,        -- source encoding id
  31  *              INTEGER,        -- destination encoding id
  32  *              CSTRING,        -- source string (null terminated C string)
  33  *              CSTRING,        -- destination string (null terminated C string)
  34  *              INTEGER         -- source string length
  35  * ) returns VOID;
  36  * ----------
  37  */
  38 Datum
  39 euc_kr_to_utf8(PG_FUNCTION_ARGS)
  40 {
  41         unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
  42         unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
  43         int                     len = PG_GETARG_INT32(4);
  44
  45         Assert(PG_GETARG_INT32(0) == PG_EUC_KR);
  46         Assert(PG_GETARG_INT32(1) == PG_UTF8);
  47         Assert(len >= 0);
  48
  49         LocalToUtf(src, dest, LUmapEUC_KR, NULL,
  50                    sizeof(LUmapEUC_KR) / sizeof(pg_local_to_utf), 0, PG_EUC_KR, len);
  51
  52         PG_RETURN_VOID();
  53 }
  54
  55 Datum
  56 utf8_to_euc_kr(PG_FUNCTION_ARGS)
  57 {
  58         unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
  59         unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
  60         int                     len = PG_GETARG_INT32(4);
  61
  62         Assert(PG_GETARG_INT32(0) == PG_UTF8);
  63         Assert(PG_GETARG_INT32(1) == PG_EUC_KR);
  64         Assert(len >= 0);
  65
  66         UtfToLocal(src, dest, ULmapEUC_KR, NULL,
  67                    sizeof(ULmapEUC_KR) / sizeof(pg_utf_to_local), 0, PG_EUC_KR, len);
  68
  69         PG_RETURN_VOID();
  70 }