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Viewing changes to src/backend/utils/mb/conversion_procs/utf8_and_ascii/utf8_and_ascii.c

  • Committer: Bazaar Package Importer
  • Author(s): Martin Pitt
  • Date: 2011-05-11 10:41:53 UTC
  • Revision ID: james.westby@ubuntu.com-20110511104153-psbh2o58553fv1m0
Tags: upstream-9.1~beta1
Import upstream version 9.1~beta1

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src/backend/utils/mb/conversion_procs/utf8_and_ascii/utf8_and_ascii.c
 
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/*-------------------------------------------------------------------------
 
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 *
 
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 *        ASCII <--> UTF8
 
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 *
 
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 * Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group
 
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 * Portions Copyright (c) 1994, Regents of the University of California
 
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 *
 
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 * IDENTIFICATION
 
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 *        src/backend/utils/mb/conversion_procs/utf8_and_ascii/utf8_and_ascii.c
 
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 *
 
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 *-------------------------------------------------------------------------
 
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 */
 
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#include "postgres.h"
 
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#include "fmgr.h"
 
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#include "mb/pg_wchar.h"
 
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PG_MODULE_MAGIC;
 
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PG_FUNCTION_INFO_V1(ascii_to_utf8);
 
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PG_FUNCTION_INFO_V1(utf8_to_ascii);
 
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extern Datum ascii_to_utf8(PG_FUNCTION_ARGS);
 
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extern Datum utf8_to_ascii(PG_FUNCTION_ARGS);
 
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/* ----------
 
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 * conv_proc(
 
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 *              INTEGER,        -- source encoding id
 
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 *              INTEGER,        -- destination encoding id
 
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 *              CSTRING,        -- source string (null terminated C string)
 
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 *              CSTRING,        -- destination string (null terminated C string)
 
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 *              INTEGER         -- source string length
 
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 * ) returns VOID;
 
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 * ----------
 
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 */
 
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Datum
 
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ascii_to_utf8(PG_FUNCTION_ARGS)
 
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{
 
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        unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
 
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        unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
 
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        int                     len = PG_GETARG_INT32(4);
 
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        CHECK_ENCODING_CONVERSION_ARGS(PG_SQL_ASCII, PG_UTF8);
 
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        /* this looks wrong, but basically we're just rejecting high-bit-set */
 
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        pg_ascii2mic(src, dest, len);
 
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        PG_RETURN_VOID();
 
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}
 
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Datum
 
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utf8_to_ascii(PG_FUNCTION_ARGS)
 
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{
 
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        unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
 
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        unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
 
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        int                     len = PG_GETARG_INT32(4);
 
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        CHECK_ENCODING_CONVERSION_ARGS(PG_UTF8, PG_SQL_ASCII);
 
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        /* this looks wrong, but basically we're just rejecting high-bit-set */
 
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        pg_mic2ascii(src, dest, len);
 
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        PG_RETURN_VOID();
 
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}