src/backend/utils/mb/conversion_procs/utf8_and_ascii/utf8_and_ascii.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  *        ASCII <--> UTF-8
   4  *
   5  * Portions Copyright (c) 1996-2002, 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_ascii/utf8_and_ascii.c,v 1.2 2002/08/22 00:01:45 tgl Exp $
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13
  14 #include "postgres.h"
  15 #include "fmgr.h"
  16 #include "mb/pg_wchar.h"
  17
  18 PG_FUNCTION_INFO_V1(ascii_to_utf8)
  19 PG_FUNCTION_INFO_V1(utf8_to_ascii)
  20
  21 extern Datum ascii_to_utf8(PG_FUNCTION_ARGS);
  22 extern Datum utf8_to_ascii(PG_FUNCTION_ARGS);
  23
  24 /* ----------
  25  * conv_proc(
  26  *              INTEGER,        -- source encoding id
  27  *              INTEGER,        -- destination encoding id
  28  *              CSTRING,        -- source string (null terminated C string)
  29  *              CSTRING,        -- destination string (null terminated C string)
  30  *              INTEGER         -- source string length
  31  * ) returns VOID;
  32  * ----------
  33  */
  34
  35 Datum
  36 ascii_to_utf8(PG_FUNCTION_ARGS)
  37 {
  38         unsigned char *src = PG_GETARG_CSTRING(2);
  39         unsigned char *dest = PG_GETARG_CSTRING(3);
  40         int len = PG_GETARG_INT32(4);
  41
  42         Assert(PG_GETARG_INT32(0) == PG_SQL_ASCII);
  43         Assert(PG_GETARG_INT32(1) == PG_UTF8);
  44         Assert(len > 0);
  45
  46         pg_ascii2mic(src, dest, len);
  47
  48         PG_RETURN_INT32(0);
  49 }
  50
  51 Datum
  52 utf8_to_ascii(PG_FUNCTION_ARGS)
  53 {
  54         unsigned char *src = PG_GETARG_CSTRING(2);
  55         unsigned char *dest = PG_GETARG_CSTRING(3);
  56         int len = PG_GETARG_INT32(4);
  57
  58         Assert(PG_GETARG_INT32(0) == PG_UTF8);
  59         Assert(PG_GETARG_INT32(1) == PG_SQL_ASCII);
  60         Assert(len > 0);
  61
  62         pg_mic2ascii(src, dest, len);
  63
  64         PG_RETURN_INT32(0);
  65 }