latin_and_mic.c

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/*-------------------------------------------------------------------------
 *
 *    LATINn and MULE_INTERNAL
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * IDENTIFICATION
 *    src/backend/utils/mb/conversion_procs/latin_and_mic/latin_and_mic.c
 *
 *-------------------------------------------------------------------------
 */
 
#include "postgres.h"
#include "fmgr.h"
#include "mb/pg_wchar.h"
 
PG_MODULE_MAGIC;
 
PG_FUNCTION_INFO_V1(latin1_to_mic);
PG_FUNCTION_INFO_V1(mic_to_latin1);
PG_FUNCTION_INFO_V1(latin3_to_mic);
PG_FUNCTION_INFO_V1(mic_to_latin3);
PG_FUNCTION_INFO_V1(latin4_to_mic);
PG_FUNCTION_INFO_V1(mic_to_latin4);
 
/* ----------
 * conv_proc(
 *      INTEGER,    -- source encoding id
 *      INTEGER,    -- destination encoding id
 *      CSTRING,    -- source string (null terminated C string)
 *      CSTRING,    -- destination string (null terminated C string)
 *      INTEGER,    -- source string length
 *      BOOL        -- if true, don't throw an error if conversion fails
 * ) returns INTEGER;
 *
 * Returns the number of bytes successfully converted.
 * ----------
 */
 
 
Datum
latin1_to_mic(PG_FUNCTION_ARGS)
{
    unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
    unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
    int         len = PG_GETARG_INT32(4);
    bool        noError = PG_GETARG_BOOL(5);
    int         converted;
 
    CHECK_ENCODING_CONVERSION_ARGS(PG_LATIN1, PG_MULE_INTERNAL);
 
    converted = latin2mic(src, dest, len, LC_ISO8859_1, PG_LATIN1, noError);
 
    PG_RETURN_INT32(converted);
}
 
Datum
mic_to_latin1(PG_FUNCTION_ARGS)
{
    unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
    unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
    int         len = PG_GETARG_INT32(4);
    bool        noError = PG_GETARG_BOOL(5);
    int         converted;
 
    CHECK_ENCODING_CONVERSION_ARGS(PG_MULE_INTERNAL, PG_LATIN1);
 
    converted = mic2latin(src, dest, len, LC_ISO8859_1, PG_LATIN1, noError);
 
    PG_RETURN_INT32(converted);
}
 
Datum
latin3_to_mic(PG_FUNCTION_ARGS)
{
    unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
    unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
    int         len = PG_GETARG_INT32(4);
    bool        noError = PG_GETARG_BOOL(5);
    int         converted;
 
    CHECK_ENCODING_CONVERSION_ARGS(PG_LATIN3, PG_MULE_INTERNAL);
 
    converted = latin2mic(src, dest, len, LC_ISO8859_3, PG_LATIN3, noError);
 
    PG_RETURN_INT32(converted);
}
 
Datum
mic_to_latin3(PG_FUNCTION_ARGS)
{
    unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
    unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
    int         len = PG_GETARG_INT32(4);
    bool        noError = PG_GETARG_BOOL(5);
    int         converted;
 
    CHECK_ENCODING_CONVERSION_ARGS(PG_MULE_INTERNAL, PG_LATIN3);
 
    converted = mic2latin(src, dest, len, LC_ISO8859_3, PG_LATIN3, noError);
 
    PG_RETURN_INT32(converted);
}
 
Datum
latin4_to_mic(PG_FUNCTION_ARGS)
{
    unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
    unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
    int         len = PG_GETARG_INT32(4);
    bool        noError = PG_GETARG_BOOL(5);
    int         converted;
 
    CHECK_ENCODING_CONVERSION_ARGS(PG_LATIN4, PG_MULE_INTERNAL);
 
    converted = latin2mic(src, dest, len, LC_ISO8859_4, PG_LATIN4, noError);
 
    PG_RETURN_INT32(converted);
}
 
Datum
mic_to_latin4(PG_FUNCTION_ARGS)
{
    unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
    unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
    int         len = PG_GETARG_INT32(4);
    bool        noError = PG_GETARG_BOOL(5);
    int         converted;
 
    CHECK_ENCODING_CONVERSION_ARGS(PG_MULE_INTERNAL, PG_LATIN4);
 
    converted = mic2latin(src, dest, len, LC_ISO8859_4, PG_LATIN4, noError);
 
    PG_RETURN_INT32(converted);
}