#include "postgres.h"
#include "access/hash.h"
#include "catalog/pg_collation.h"
#include "utils/builtins.h"
#include "utils/formatting.h"

Include dependency graph for citext.c:

Functions
static int32	citextcmp (text left, text right, Oid collid)
Datum	citext_cmp (PG_FUNCTION_ARGS)
Datum	citext_hash (PG_FUNCTION_ARGS)
Datum	citext_eq (PG_FUNCTION_ARGS)
Datum	citext_ne (PG_FUNCTION_ARGS)
Datum	citext_gt (PG_FUNCTION_ARGS)
Datum	citext_ge (PG_FUNCTION_ARGS)
Datum	citext_lt (PG_FUNCTION_ARGS)
Datum	citext_le (PG_FUNCTION_ARGS)
Datum	citext_smaller (PG_FUNCTION_ARGS)
Datum	citext_larger (PG_FUNCTION_ARGS)
	PG_FUNCTION_INFO_V1 (citext_cmp)
	PG_FUNCTION_INFO_V1 (citext_hash)
	PG_FUNCTION_INFO_V1 (citext_eq)
	PG_FUNCTION_INFO_V1 (citext_ne)
	PG_FUNCTION_INFO_V1 (citext_lt)
	PG_FUNCTION_INFO_V1 (citext_le)
	PG_FUNCTION_INFO_V1 (citext_gt)
	PG_FUNCTION_INFO_V1 (citext_ge)
	PG_FUNCTION_INFO_V1 (citext_smaller)
	PG_FUNCTION_INFO_V1 (citext_larger)

Function Documentation

Datum citext_cmp ( PG_FUNCTION_ARGS )

Definition at line 81 of file citext.c.

References citextcmp(), PG_FREE_IF_COPY, PG_GET_COLLATION, PG_GETARG_TEXT_PP, and PG_RETURN_INT32.

{
    text       *left = PG_GETARG_TEXT_PP(0);
    text       *right = PG_GETARG_TEXT_PP(1);
    int32       result;

    result = citextcmp(left, right, PG_GET_COLLATION());

    PG_FREE_IF_COPY(left, 0);
    PG_FREE_IF_COPY(right, 1);

    PG_RETURN_INT32(result);
}

Datum citext_eq ( PG_FUNCTION_ARGS )

Definition at line 123 of file citext.c.

References DEFAULT_COLLATION_OID, pfree(), PG_FREE_IF_COPY, PG_GETARG_TEXT_PP, PG_RETURN_BOOL, str_tolower(), VARDATA_ANY, and VARSIZE_ANY_EXHDR.

{
    text       *left = PG_GETARG_TEXT_PP(0);
    text       *right = PG_GETARG_TEXT_PP(1);
    char       *lcstr,
               *rcstr;
    bool        result;

    /* We can't compare lengths in advance of downcasing ... */

    lcstr = str_tolower(VARDATA_ANY(left), VARSIZE_ANY_EXHDR(left), DEFAULT_COLLATION_OID);
    rcstr = str_tolower(VARDATA_ANY(right), VARSIZE_ANY_EXHDR(right), DEFAULT_COLLATION_OID);

    /*
     * Since we only care about equality or not-equality, we can avoid all the
     * expense of strcoll() here, and just do bitwise comparison.
     */
    result = (strcmp(lcstr, rcstr) == 0);

    pfree(lcstr);
    pfree(rcstr);
    PG_FREE_IF_COPY(left, 0);
    PG_FREE_IF_COPY(right, 1);

    PG_RETURN_BOOL(result);
}

Datum citext_ge ( PG_FUNCTION_ARGS )

Definition at line 234 of file citext.c.

References citextcmp(), PG_FREE_IF_COPY, PG_GET_COLLATION, PG_GETARG_TEXT_PP, and PG_RETURN_BOOL.

{
    text       *left = PG_GETARG_TEXT_PP(0);
    text       *right = PG_GETARG_TEXT_PP(1);
    bool        result;

    result = citextcmp(left, right, PG_GET_COLLATION()) >= 0;

    PG_FREE_IF_COPY(left, 0);
    PG_FREE_IF_COPY(right, 1);

    PG_RETURN_BOOL(result);
}

Datum citext_gt ( PG_FUNCTION_ARGS )

Definition at line 217 of file citext.c.

References citextcmp(), PG_FREE_IF_COPY, PG_GET_COLLATION, PG_GETARG_TEXT_PP, and PG_RETURN_BOOL.

{
    text       *left = PG_GETARG_TEXT_PP(0);
    text       *right = PG_GETARG_TEXT_PP(1);
    bool        result;

    result = citextcmp(left, right, PG_GET_COLLATION()) > 0;

    PG_FREE_IF_COPY(left, 0);
    PG_FREE_IF_COPY(right, 1);

    PG_RETURN_BOOL(result);
}

Datum citext_hash ( PG_FUNCTION_ARGS )

Definition at line 98 of file citext.c.

References DEFAULT_COLLATION_OID, hash_any(), pfree(), PG_FREE_IF_COPY, PG_GETARG_TEXT_PP, PG_RETURN_DATUM, str_tolower(), VARDATA_ANY, and VARSIZE_ANY_EXHDR.

{
    text       *txt = PG_GETARG_TEXT_PP(0);
    char       *str;
    Datum       result;

    str = str_tolower(VARDATA_ANY(txt), VARSIZE_ANY_EXHDR(txt), DEFAULT_COLLATION_OID);
    result = hash_any((unsigned char *) str, strlen(str));
    pfree(str);

    /* Avoid leaking memory for toasted inputs */
    PG_FREE_IF_COPY(txt, 0);

    PG_RETURN_DATUM(result);
}

Datum citext_larger ( PG_FUNCTION_ARGS )

Definition at line 270 of file citext.c.

References citextcmp(), PG_GET_COLLATION, PG_GETARG_TEXT_PP, and PG_RETURN_TEXT_P.

{
    text       *left = PG_GETARG_TEXT_PP(0);
    text       *right = PG_GETARG_TEXT_PP(1);
    text       *result;

    result = citextcmp(left, right, PG_GET_COLLATION()) > 0 ? left : right;
    PG_RETURN_TEXT_P(result);
}

Datum citext_le ( PG_FUNCTION_ARGS )

Definition at line 200 of file citext.c.

References citextcmp(), PG_FREE_IF_COPY, PG_GET_COLLATION, PG_GETARG_TEXT_PP, and PG_RETURN_BOOL.

{
    text       *left = PG_GETARG_TEXT_PP(0);
    text       *right = PG_GETARG_TEXT_PP(1);
    bool        result;

    result = citextcmp(left, right, PG_GET_COLLATION()) <= 0;

    PG_FREE_IF_COPY(left, 0);
    PG_FREE_IF_COPY(right, 1);

    PG_RETURN_BOOL(result);
}

Datum citext_lt ( PG_FUNCTION_ARGS )

Definition at line 183 of file citext.c.

References citextcmp(), PG_FREE_IF_COPY, PG_GET_COLLATION, PG_GETARG_TEXT_PP, and PG_RETURN_BOOL.

{
    text       *left = PG_GETARG_TEXT_PP(0);
    text       *right = PG_GETARG_TEXT_PP(1);
    bool        result;

    result = citextcmp(left, right, PG_GET_COLLATION()) < 0;

    PG_FREE_IF_COPY(left, 0);
    PG_FREE_IF_COPY(right, 1);

    PG_RETURN_BOOL(result);
}

Datum citext_ne ( PG_FUNCTION_ARGS )

Definition at line 153 of file citext.c.

References DEFAULT_COLLATION_OID, pfree(), PG_FREE_IF_COPY, PG_GETARG_TEXT_PP, PG_RETURN_BOOL, str_tolower(), VARDATA_ANY, and VARSIZE_ANY_EXHDR.

{
    text       *left = PG_GETARG_TEXT_PP(0);
    text       *right = PG_GETARG_TEXT_PP(1);
    char       *lcstr,
               *rcstr;
    bool        result;

    /* We can't compare lengths in advance of downcasing ... */

    lcstr = str_tolower(VARDATA_ANY(left), VARSIZE_ANY_EXHDR(left), DEFAULT_COLLATION_OID);
    rcstr = str_tolower(VARDATA_ANY(right), VARSIZE_ANY_EXHDR(right), DEFAULT_COLLATION_OID);

    /*
     * Since we only care about equality or not-equality, we can avoid all the
     * expense of strcoll() here, and just do bitwise comparison.
     */
    result = (strcmp(lcstr, rcstr) != 0);

    pfree(lcstr);
    pfree(rcstr);
    PG_FREE_IF_COPY(left, 0);
    PG_FREE_IF_COPY(right, 1);

    PG_RETURN_BOOL(result);
}

Datum citext_smaller ( PG_FUNCTION_ARGS )

Definition at line 257 of file citext.c.

References citextcmp(), PG_GET_COLLATION, PG_GETARG_TEXT_PP, and PG_RETURN_TEXT_P.

{
    text       *left = PG_GETARG_TEXT_PP(0);
    text       *right = PG_GETARG_TEXT_PP(1);
    text       *result;

    result = citextcmp(left, right, PG_GET_COLLATION()) < 0 ? left : right;
    PG_RETURN_TEXT_P(result);
}

static int32 citextcmp	(	text *	left,
		text *	right,
		Oid	collid
	)			`[static]`

Definition at line 45 of file citext.c.

References DEFAULT_COLLATION_OID, pfree(), str_tolower(), VARDATA_ANY, VARSIZE_ANY_EXHDR, and varstr_cmp().

Referenced by citext_cmp(), citext_ge(), citext_gt(), citext_larger(), citext_le(), citext_lt(), and citext_smaller().

{
    char       *lcstr,
               *rcstr;
    int32       result;

    /*
     * We must do our str_tolower calls with DEFAULT_COLLATION_OID, not the
     * input collation as you might expect.  This is so that the behavior of
     * citext's equality and hashing functions is not collation-dependent.  We
     * should change this once the core infrastructure is able to cope with
     * collation-dependent equality and hashing functions.
     */

    lcstr = str_tolower(VARDATA_ANY(left), VARSIZE_ANY_EXHDR(left), DEFAULT_COLLATION_OID);
    rcstr = str_tolower(VARDATA_ANY(right), VARSIZE_ANY_EXHDR(right), DEFAULT_COLLATION_OID);

    result = varstr_cmp(lcstr, strlen(lcstr),
                        rcstr, strlen(rcstr),
                        collid);

    pfree(lcstr);
    pfree(rcstr);

    return result;
}

PG_FUNCTION_INFO_V1 ( citext_larger )

PG_FUNCTION_INFO_V1 ( citext_ne )

PG_FUNCTION_INFO_V1 ( citext_le )

PG_FUNCTION_INFO_V1 ( citext_lt )

PG_FUNCTION_INFO_V1 ( citext_smaller )

PG_FUNCTION_INFO_V1 ( citext_ge )

PG_FUNCTION_INFO_V1 ( citext_eq )

PG_FUNCTION_INFO_V1 ( citext_hash )

PG_FUNCTION_INFO_V1 ( citext_gt )

PG_FUNCTION_INFO_V1 ( citext_cmp )

Header And Logo

citext.c File Reference

Functions

Function Documentation