ascii.h File Reference

#include "fmgr.h"

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Functions
Datum	to_ascii_encname (PG_FUNCTION_ARGS)
Datum	to_ascii_enc (PG_FUNCTION_ARGS)
Datum	to_ascii_default (PG_FUNCTION_ARGS)
void	ascii_safe_strlcpy (char *dest, const char *src, size_t destsiz)

---

Function Documentation

void ascii_safe_strlcpy	(	char *	dest,
		const char *	src,
		size_t	destsiz
	)

Definition at line 172 of file ascii.c.

Referenced by pgstat_get_crashed_backend_activity().

{
    if (destsiz == 0)           /* corner case: no room for trailing nul */
        return;

    while (--destsiz > 0)
    {
        /* use unsigned char here to avoid compiler warning */
        unsigned char ch = *src++;

        if (ch == '\0')
            break;
        /* Keep printable ASCII characters */
        if (32 <= ch && ch <= 127)
            *dest = ch;
        /* White-space is also OK */
        else if (ch == '\n' || ch == '\r' || ch == '\t')
            *dest = ch;
        /* Everything else is replaced with '?' */
        else
            *dest = '?';
        dest++;
    }

    *dest = '\0';
}

Datum to_ascii_default

(

PG_FUNCTION_ARGS

)

Definition at line 154 of file ascii.c.

References enc, encode_to_ascii(), GetDatabaseEncoding(), PG_GETARG_TEXT_P_COPY, and PG_RETURN_TEXT_P.

{
    text       *data = PG_GETARG_TEXT_P_COPY(0);
    int         enc = GetDatabaseEncoding();

    PG_RETURN_TEXT_P(encode_to_ascii(data, enc));
}

Datum to_ascii_enc

(

PG_FUNCTION_ARGS

)

Definition at line 136 of file ascii.c.

References enc, encode_to_ascii(), ereport, errcode(), errmsg(), ERROR, PG_GETARG_INT32, PG_GETARG_TEXT_P_COPY, PG_RETURN_TEXT_P, and PG_VALID_ENCODING.

{
    text       *data = PG_GETARG_TEXT_P_COPY(0);
    int         enc = PG_GETARG_INT32(1);

    if (!PG_VALID_ENCODING(enc))
        ereport(ERROR,
                (errcode(ERRCODE_UNDEFINED_OBJECT),
                 errmsg("%d is not a valid encoding code", enc)));

    PG_RETURN_TEXT_P(encode_to_ascii(data, enc));
}

Datum to_ascii_encname

(

PG_FUNCTION_ARGS

)

Definition at line 117 of file ascii.c.

References enc, encode_to_ascii(), ereport, errcode(), errmsg(), ERROR, NameStr, pg_char_to_encoding(), PG_GETARG_NAME, PG_GETARG_TEXT_P_COPY, and PG_RETURN_TEXT_P.

{
    text       *data = PG_GETARG_TEXT_P_COPY(0);
    char       *encname = NameStr(*PG_GETARG_NAME(1));
    int         enc = pg_char_to_encoding(encname);

    if (enc < 0)
        ereport(ERROR,
                (errcode(ERRCODE_UNDEFINED_OBJECT),
                 errmsg("%s is not a valid encoding name", encname)));

    PG_RETURN_TEXT_P(encode_to_ascii(data, enc));
}