granicus.if.org Git - postgresql/blob - src/backend/utils/mb/conversion_procs/utf8_and_euc_cn/utf8_and_euc_cn.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  *        EUC_CN <--> UTF-8
   4  *
   5  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
   6  * Portions Copyright (c) 1994, Regents of the University of California
   7  *
   8  * IDENTIFICATION
   9  *        $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_cn/utf8_and_euc_cn.c,v 1.6 2003/08/04 02:40:07 momjian Exp $
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13
  14 #include "postgres.h"
  15 #include "fmgr.h"
  16 #include "mb/pg_wchar.h"
  17 #include "../../Unicode/euc_cn_to_utf8.map"
  18 #include "../../Unicode/utf8_to_euc_cn.map"
  19
  20 PG_FUNCTION_INFO_V1(euc_cn_to_utf8);
  21 PG_FUNCTION_INFO_V1(utf8_to_euc_cn);
  22
  23 extern Datum euc_cn_to_utf8(PG_FUNCTION_ARGS);
  24 extern Datum utf8_to_euc_cn(PG_FUNCTION_ARGS);
  25
  26 /* ----------
  27  * conv_proc(
  28  *              INTEGER,        -- source encoding id
  29  *              INTEGER,        -- destination encoding id
  30  *              CSTRING,        -- source string (null terminated C string)
  31  *              CSTRING,        -- destination string (null terminated C string)
  32  *              INTEGER         -- source string length
  33  * ) returns VOID;
  34  * ----------
  35  */
  36 Datum
  37 euc_cn_to_utf8(PG_FUNCTION_ARGS)
  38 {
  39         unsigned char *src = PG_GETARG_CSTRING(2);
  40         unsigned char *dest = PG_GETARG_CSTRING(3);
  41         int                     len = PG_GETARG_INT32(4);
  42
  43         Assert(PG_GETARG_INT32(0) == PG_EUC_CN);
  44         Assert(PG_GETARG_INT32(1) == PG_UTF8);
  45         Assert(len >= 0);
  46
  47         LocalToUtf(src, dest, LUmapEUC_CN,
  48                   sizeof(LUmapEUC_CN) / sizeof(pg_local_to_utf), PG_EUC_CN, len);
  49
  50         PG_RETURN_VOID();
  51 }
  52
  53 Datum
  54 utf8_to_euc_cn(PG_FUNCTION_ARGS)
  55 {
  56         unsigned char *src = PG_GETARG_CSTRING(2);
  57         unsigned char *dest = PG_GETARG_CSTRING(3);
  58         int                     len = PG_GETARG_INT32(4);
  59
  60         Assert(PG_GETARG_INT32(0) == PG_UTF8);
  61         Assert(PG_GETARG_INT32(1) == PG_EUC_CN);
  62         Assert(len >= 0);
  63
  64         UtfToLocal(src, dest, ULmapEUC_CN,
  65                            sizeof(ULmapEUC_CN) / sizeof(pg_utf_to_local), len);
  66
  67         PG_RETURN_VOID();
  68 }