granicus.if.org Git - postgresql/blob - src/backend/utils/mb/conversion_procs/utf8_and_cyrillic/utf8_and_cyrillic.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  *        UTF8 and Cyrillic
   4  *
   5  * Portions Copyright (c) 1996-2006, 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_cyrillic/utf8_and_cyrillic.c,v 1.17 2006/10/04 00:30:02 momjian Exp $
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13
  14 #include "postgres.h"
  15 #include "fmgr.h"
  16 #include "mb/pg_wchar.h"
  17 #include "../../Unicode/utf8_to_koi8r.map"
  18 #include "../../Unicode/koi8r_to_utf8.map"
  19
  20 PG_MODULE_MAGIC;
  21
  22 PG_FUNCTION_INFO_V1(utf8_to_koi8r);
  23 PG_FUNCTION_INFO_V1(koi8r_to_utf8);
  24
  25 extern Datum utf8_to_koi8r(PG_FUNCTION_ARGS);
  26 extern Datum koi8r_to_utf8(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
  39 Datum
  40 utf8_to_koi8r(PG_FUNCTION_ARGS)
  41 {
  42         unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
  43         unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
  44         int                     len = PG_GETARG_INT32(4);
  45
  46         Assert(PG_GETARG_INT32(0) == PG_UTF8);
  47         Assert(PG_GETARG_INT32(1) == PG_KOI8R);
  48         Assert(len >= 0);
  49
  50         UtfToLocal(src, dest, ULmapKOI8R,
  51                            sizeof(ULmapKOI8R) / sizeof(pg_utf_to_local), PG_KOI8R, len);
  52
  53         PG_RETURN_VOID();
  54 }
  55
  56 Datum
  57 koi8r_to_utf8(PG_FUNCTION_ARGS)
  58 {
  59         unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
  60         unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
  61         int                     len = PG_GETARG_INT32(4);
  62
  63         Assert(PG_GETARG_INT32(0) == PG_KOI8R);
  64         Assert(PG_GETARG_INT32(1) == PG_UTF8);
  65         Assert(len >= 0);
  66
  67         LocalToUtf(src, dest, LUmapKOI8R,
  68                            sizeof(LUmapKOI8R) / sizeof(pg_local_to_utf), PG_KOI8R, len);
  69
  70         PG_RETURN_VOID();
  71 }