src/backend/utils/mb/conversion_procs/utf8_and_cyrillic/utf8_and_cyrillic.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  *        UTF8 and Cyrillic
   4  *
   5  * Portions Copyright (c) 1996-2004, 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 1.8 2004/08/29 04:12:57 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 #include "../../Unicode/utf8_to_win1251.map"
  20 #include "../../Unicode/win1251_to_utf8.map"
  21 #include "../../Unicode/utf8_to_alt.map"
  22 #include "../../Unicode/alt_to_utf8.map"
  23
  24 PG_FUNCTION_INFO_V1(utf8_to_koi8r);
  25 PG_FUNCTION_INFO_V1(koi8r_to_utf8);
  26 PG_FUNCTION_INFO_V1(utf8_to_win1251);
  27 PG_FUNCTION_INFO_V1(win1251_to_utf8);
  28 PG_FUNCTION_INFO_V1(utf8_to_alt);
  29 PG_FUNCTION_INFO_V1(alt_to_utf8);
  30
  31 extern Datum utf8_to_koi8r(PG_FUNCTION_ARGS);
  32 extern Datum koi8r_to_utf8(PG_FUNCTION_ARGS);
  33 extern Datum utf8_to_win1251(PG_FUNCTION_ARGS);
  34 extern Datum win1251_to_utf8(PG_FUNCTION_ARGS);
  35 extern Datum utf8_to_alt(PG_FUNCTION_ARGS);
  36 extern Datum alt_to_utf8(PG_FUNCTION_ARGS);
  37
  38 /* ----------
  39  * conv_proc(
  40  *              INTEGER,        -- source encoding id
  41  *              INTEGER,        -- destination encoding id
  42  *              CSTRING,        -- source string (null terminated C string)
  43  *              CSTRING,        -- destination string (null terminated C string)
  44  *              INTEGER         -- source string length
  45  * ) returns VOID;
  46  * ----------
  47  */
  48
  49 Datum
  50 utf8_to_koi8r(PG_FUNCTION_ARGS)
  51 {
  52         unsigned char *src = PG_GETARG_CSTRING(2);
  53         unsigned char *dest = PG_GETARG_CSTRING(3);
  54         int                     len = PG_GETARG_INT32(4);
  55
  56         Assert(PG_GETARG_INT32(0) == PG_UTF8);
  57         Assert(PG_GETARG_INT32(1) == PG_KOI8R);
  58         Assert(len >= 0);
  59
  60         UtfToLocal(src, dest, ULmap_KOI8R,
  61                            sizeof(ULmap_KOI8R) / sizeof(pg_utf_to_local), len);
  62
  63         PG_RETURN_VOID();
  64 }
  65
  66 Datum
  67 koi8r_to_utf8(PG_FUNCTION_ARGS)
  68 {
  69         unsigned char *src = PG_GETARG_CSTRING(2);
  70         unsigned char *dest = PG_GETARG_CSTRING(3);
  71         int                     len = PG_GETARG_INT32(4);
  72
  73         Assert(PG_GETARG_INT32(0) == PG_KOI8R);
  74         Assert(PG_GETARG_INT32(1) == PG_UTF8);
  75         Assert(len >= 0);
  76
  77         LocalToUtf(src, dest, LUmapKOI8R,
  78                         sizeof(LUmapKOI8R) / sizeof(pg_local_to_utf), PG_KOI8R, len);
  79
  80         PG_RETURN_VOID();
  81 }
  82
  83 Datum
  84 utf8_to_win1251(PG_FUNCTION_ARGS)
  85 {
  86         unsigned char *src = PG_GETARG_CSTRING(2);
  87         unsigned char *dest = PG_GETARG_CSTRING(3);
  88         int                     len = PG_GETARG_INT32(4);
  89
  90         Assert(PG_GETARG_INT32(0) == PG_UTF8);
  91         Assert(PG_GETARG_INT32(1) == PG_WIN1251);
  92         Assert(len >= 0);
  93
  94         UtfToLocal(src, dest, ULmap_WIN1251,
  95                            sizeof(ULmap_WIN1251) / sizeof(pg_utf_to_local), len);
  96
  97         PG_RETURN_VOID();
  98 }
  99
 100 Datum
 101 win1251_to_utf8(PG_FUNCTION_ARGS)
 102 {
 103         unsigned char *src = PG_GETARG_CSTRING(2);
 104         unsigned char *dest = PG_GETARG_CSTRING(3);
 105         int                     len = PG_GETARG_INT32(4);
 106
 107         Assert(PG_GETARG_INT32(0) == PG_WIN1251);
 108         Assert(PG_GETARG_INT32(1) == PG_UTF8);
 109         Assert(len >= 0);
 110
 111         LocalToUtf(src, dest, LUmapWIN1251,
 112                 sizeof(LUmapWIN1251) / sizeof(pg_local_to_utf), PG_WIN1251, len);
 113
 114         PG_RETURN_VOID();
 115 }
 116
 117 Datum
 118 utf8_to_alt(PG_FUNCTION_ARGS)
 119 {
 120         unsigned char *src = PG_GETARG_CSTRING(2);
 121         unsigned char *dest = PG_GETARG_CSTRING(3);
 122         int                     len = PG_GETARG_INT32(4);
 123
 124         Assert(PG_GETARG_INT32(0) == PG_UTF8);
 125         Assert(PG_GETARG_INT32(1) == PG_ALT);
 126         Assert(len >= 0);
 127
 128         UtfToLocal(src, dest, ULmap_ALT,
 129                            sizeof(ULmap_ALT) / sizeof(pg_utf_to_local), len);
 130
 131         PG_RETURN_VOID();
 132 }
 133
 134 Datum
 135 alt_to_utf8(PG_FUNCTION_ARGS)
 136 {
 137         unsigned char *src = PG_GETARG_CSTRING(2);
 138         unsigned char *dest = PG_GETARG_CSTRING(3);
 139         int                     len = PG_GETARG_INT32(4);
 140
 141         Assert(PG_GETARG_INT32(0) == PG_ALT);
 142         Assert(PG_GETARG_INT32(1) == PG_UTF8);
 143         Assert(len >= 0);
 144
 145         LocalToUtf(src, dest, LUmapALT,
 146                            sizeof(LUmapALT) / sizeof(pg_local_to_utf), PG_ALT, len);
 147
 148         PG_RETURN_VOID();
 149 }