utf8_and_iso8859_1.c File Reference

#include "postgres.h"
#include "fmgr.h"
#include "mb/pg_wchar.h"

Include dependency graph for utf8_and_iso8859_1.c:

Go to the source code of this file.

Functions
	PG_FUNCTION_INFO_V1 (iso8859_1_to_utf8)
	PG_FUNCTION_INFO_V1 (utf8_to_iso8859_1)
Datum	iso8859_1_to_utf8 (PG_FUNCTION_ARGS)
Datum	utf8_to_iso8859_1 (PG_FUNCTION_ARGS)
Variables
	PG_MODULE_MAGIC

---

Function Documentation

Datum iso8859_1_to_utf8

(

PG_FUNCTION_ARGS

)

Definition at line 38 of file utf8_and_iso8859_1.c.

References CHECK_ENCODING_CONVERSION_ARGS, HIGHBIT, IS_HIGHBIT_SET, PG_GETARG_CSTRING, PG_GETARG_INT32, PG_LATIN1, PG_RETURN_VOID, PG_UTF8, and report_invalid_encoding().

{
    unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
    unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
    int         len = PG_GETARG_INT32(4);
    unsigned short c;

    CHECK_ENCODING_CONVERSION_ARGS(PG_LATIN1, PG_UTF8);

    while (len > 0)
    {
        c = *src;
        if (c == 0)
            report_invalid_encoding(PG_LATIN1, (const char *) src, len);
        if (!IS_HIGHBIT_SET(c))
            *dest++ = c;
        else
        {
            *dest++ = (c >> 6) | 0xc0;
            *dest++ = (c & 0x003f) | HIGHBIT;
        }
        src++;
        len--;
    }
    *dest = '\0';

    PG_RETURN_VOID();
}

PG_FUNCTION_INFO_V1

(

utf8_to_iso8859_1

)

PG_FUNCTION_INFO_V1

(

iso8859_1_to_utf8

)

Datum utf8_to_iso8859_1

(

PG_FUNCTION_ARGS

)

Definition at line 68 of file utf8_and_iso8859_1.c.

References CHECK_ENCODING_CONVERSION_ARGS, IS_HIGHBIT_SET, PG_GETARG_CSTRING, PG_GETARG_INT32, PG_LATIN1, PG_RETURN_VOID, PG_UTF8, pg_utf8_islegal(), pg_utf_mblen(), report_invalid_encoding(), and report_untranslatable_char().

{
    unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
    unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
    int         len = PG_GETARG_INT32(4);
    unsigned short c,
                c1;

    CHECK_ENCODING_CONVERSION_ARGS(PG_UTF8, PG_LATIN1);

    while (len > 0)
    {
        c = *src;
        if (c == 0)
            report_invalid_encoding(PG_UTF8, (const char *) src, len);
        /* fast path for ASCII-subset characters */
        if (!IS_HIGHBIT_SET(c))
        {
            *dest++ = c;
            src++;
            len--;
        }
        else
        {
            int         l = pg_utf_mblen(src);

            if (l > len || !pg_utf8_islegal(src, l))
                report_invalid_encoding(PG_UTF8, (const char *) src, len);
            if (l != 2)
                report_untranslatable_char(PG_UTF8, PG_LATIN1,
                                           (const char *) src, len);
            c1 = src[1] & 0x3f;
            c = ((c & 0x1f) << 6) | c1;
            if (c >= 0x80 && c <= 0xff)
            {
                *dest++ = (unsigned char) c;
                src += 2;
                len -= 2;
            }
            else
                report_untranslatable_char(PG_UTF8, PG_LATIN1,
                                           (const char *) src, len);
        }
    }
    *dest = '\0';

    PG_RETURN_VOID();
}

---

Variable Documentation

PG_MODULE_MAGIC

Definition at line 18 of file utf8_and_iso8859_1.c.