nbtcompare.c File Reference

#include "postgres.h"
#include <limits.h>
#include "utils/fmgrprotos.h"
#include "utils/sortsupport.h"

Include dependency graph for nbtcompare.c:

Go to the source code of this file.

Macros
#define	A_LESS_THAN_B   (-1)
#define	A_GREATER_THAN_B   1

Functions
Datum	btboolcmp (PG_FUNCTION_ARGS)
Datum	btint2cmp (PG_FUNCTION_ARGS)
static int	btint2fastcmp (Datum x, Datum y, SortSupport ssup)
Datum	btint2sortsupport (PG_FUNCTION_ARGS)
Datum	btint4cmp (PG_FUNCTION_ARGS)
Datum	btint4sortsupport (PG_FUNCTION_ARGS)
Datum	btint8cmp (PG_FUNCTION_ARGS)
static int	btint8fastcmp (Datum x, Datum y, SortSupport ssup)
Datum	btint8sortsupport (PG_FUNCTION_ARGS)
Datum	btint48cmp (PG_FUNCTION_ARGS)
Datum	btint84cmp (PG_FUNCTION_ARGS)
Datum	btint24cmp (PG_FUNCTION_ARGS)
Datum	btint42cmp (PG_FUNCTION_ARGS)
Datum	btint28cmp (PG_FUNCTION_ARGS)
Datum	btint82cmp (PG_FUNCTION_ARGS)
Datum	btoidcmp (PG_FUNCTION_ARGS)
static int	btoidfastcmp (Datum x, Datum y, SortSupport ssup)
Datum	btoidsortsupport (PG_FUNCTION_ARGS)
Datum	btoidvectorcmp (PG_FUNCTION_ARGS)
Datum	btcharcmp (PG_FUNCTION_ARGS)

Macro Definition Documentation

A_GREATER_THAN_B

#define A_GREATER_THAN_B   1

Definition at line 68 of file nbtcompare.c.

A_LESS_THAN_B

#define A_LESS_THAN_B   (-1)

Definition at line 67 of file nbtcompare.c.

Function Documentation

btboolcmp()

Datum btboolcmp

(

PG_FUNCTION_ARGS

)

Definition at line 73 of file nbtcompare.c.

{
    bool        a = PG_GETARG_BOOL(0);
    bool        b = PG_GETARG_BOOL(1);
 
    PG_RETURN_INT32((int32) a - (int32) b);
}

References a, b, PG_GETARG_BOOL, and PG_RETURN_INT32.

btcharcmp()

Datum btcharcmp

(

PG_FUNCTION_ARGS

)

Definition at line 320 of file nbtcompare.c.

{
    char        a = PG_GETARG_CHAR(0);
    char        b = PG_GETARG_CHAR(1);
 
    /* Be careful to compare chars as unsigned */
    PG_RETURN_INT32((int32) ((uint8) a) - (int32) ((uint8) b));
}

References a, b, PG_GETARG_CHAR, and PG_RETURN_INT32.

btint24cmp()

Datum btint24cmp

(

PG_FUNCTION_ARGS

)

Definition at line 203 of file nbtcompare.c.

{
    int16       a = PG_GETARG_INT16(0);
    int32       b = PG_GETARG_INT32(1);
 
    if (a > b)
        PG_RETURN_INT32(A_GREATER_THAN_B);
    else if (a == b)
        PG_RETURN_INT32(0);
    else
        PG_RETURN_INT32(A_LESS_THAN_B);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, PG_GETARG_INT16, PG_GETARG_INT32, and PG_RETURN_INT32.

btint28cmp()

Datum btint28cmp

(

PG_FUNCTION_ARGS

)

Definition at line 231 of file nbtcompare.c.

{
    int16       a = PG_GETARG_INT16(0);
    int64       b = PG_GETARG_INT64(1);
 
    if (a > b)
        PG_RETURN_INT32(A_GREATER_THAN_B);
    else if (a == b)
        PG_RETURN_INT32(0);
    else
        PG_RETURN_INT32(A_LESS_THAN_B);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, PG_GETARG_INT16, PG_GETARG_INT64, and PG_RETURN_INT32.

btint2cmp()

Datum btint2cmp

(

PG_FUNCTION_ARGS

)

Definition at line 82 of file nbtcompare.c.

{
    int16       a = PG_GETARG_INT16(0);
    int16       b = PG_GETARG_INT16(1);
 
    PG_RETURN_INT32((int32) a - (int32) b);
}

References a, b, PG_GETARG_INT16, and PG_RETURN_INT32.

btint2fastcmp()

static int btint2fastcmp ( Datum  x, Datum  y, SortSupport  ssup  )

static

Definition at line 91 of file nbtcompare.c.

{
    int16       a = DatumGetInt16(x);
    int16       b = DatumGetInt16(y);
 
    return (int) a - (int) b;
}

References a, b, DatumGetInt16(), x, and y.

Referenced by btint2sortsupport().

btint2sortsupport()

Datum btint2sortsupport

(

PG_FUNCTION_ARGS

)

Definition at line 100 of file nbtcompare.c.

{
    SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
 
    ssup->comparator = btint2fastcmp;
    PG_RETURN_VOID();
}

References btint2fastcmp(), SortSupportData::comparator, PG_GETARG_POINTER, and PG_RETURN_VOID.

btint42cmp()

Datum btint42cmp

(

PG_FUNCTION_ARGS

)

Definition at line 217 of file nbtcompare.c.

{
    int32       a = PG_GETARG_INT32(0);
    int16       b = PG_GETARG_INT16(1);
 
    if (a > b)
        PG_RETURN_INT32(A_GREATER_THAN_B);
    else if (a == b)
        PG_RETURN_INT32(0);
    else
        PG_RETURN_INT32(A_LESS_THAN_B);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, PG_GETARG_INT16, PG_GETARG_INT32, and PG_RETURN_INT32.

btint48cmp()

Datum btint48cmp

(

PG_FUNCTION_ARGS

)

Definition at line 175 of file nbtcompare.c.

{
    int32       a = PG_GETARG_INT32(0);
    int64       b = PG_GETARG_INT64(1);
 
    if (a > b)
        PG_RETURN_INT32(A_GREATER_THAN_B);
    else if (a == b)
        PG_RETURN_INT32(0);
    else
        PG_RETURN_INT32(A_LESS_THAN_B);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, PG_GETARG_INT32, PG_GETARG_INT64, and PG_RETURN_INT32.

btint4cmp()

Datum btint4cmp

(

PG_FUNCTION_ARGS

)

Definition at line 109 of file nbtcompare.c.

{
    int32       a = PG_GETARG_INT32(0);
    int32       b = PG_GETARG_INT32(1);
 
    if (a > b)
        PG_RETURN_INT32(A_GREATER_THAN_B);
    else if (a == b)
        PG_RETURN_INT32(0);
    else
        PG_RETURN_INT32(A_LESS_THAN_B);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, PG_GETARG_INT32, and PG_RETURN_INT32.

btint4sortsupport()

Datum btint4sortsupport

(

PG_FUNCTION_ARGS

)

Definition at line 123 of file nbtcompare.c.

{
    SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
 
    ssup->comparator = ssup_datum_int32_cmp;
    PG_RETURN_VOID();
}

References SortSupportData::comparator, PG_GETARG_POINTER, PG_RETURN_VOID, and ssup_datum_int32_cmp().

btint82cmp()

Datum btint82cmp

(

PG_FUNCTION_ARGS

)

Definition at line 245 of file nbtcompare.c.

{
    int64       a = PG_GETARG_INT64(0);
    int16       b = PG_GETARG_INT16(1);
 
    if (a > b)
        PG_RETURN_INT32(A_GREATER_THAN_B);
    else if (a == b)
        PG_RETURN_INT32(0);
    else
        PG_RETURN_INT32(A_LESS_THAN_B);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, PG_GETARG_INT16, PG_GETARG_INT64, and PG_RETURN_INT32.

btint84cmp()

Datum btint84cmp

(

PG_FUNCTION_ARGS

)

Definition at line 189 of file nbtcompare.c.

{
    int64       a = PG_GETARG_INT64(0);
    int32       b = PG_GETARG_INT32(1);
 
    if (a > b)
        PG_RETURN_INT32(A_GREATER_THAN_B);
    else if (a == b)
        PG_RETURN_INT32(0);
    else
        PG_RETURN_INT32(A_LESS_THAN_B);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, PG_GETARG_INT32, PG_GETARG_INT64, and PG_RETURN_INT32.

btint8cmp()

Datum btint8cmp

(

PG_FUNCTION_ARGS

)

Definition at line 132 of file nbtcompare.c.

{
    int64       a = PG_GETARG_INT64(0);
    int64       b = PG_GETARG_INT64(1);
 
    if (a > b)
        PG_RETURN_INT32(A_GREATER_THAN_B);
    else if (a == b)
        PG_RETURN_INT32(0);
    else
        PG_RETURN_INT32(A_LESS_THAN_B);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, PG_GETARG_INT64, and PG_RETURN_INT32.

btint8fastcmp()

static int btint8fastcmp ( Datum  x, Datum  y, SortSupport  ssup  )

static

Definition at line 147 of file nbtcompare.c.

{
    int64       a = DatumGetInt64(x);
    int64       b = DatumGetInt64(y);
 
    if (a > b)
        return A_GREATER_THAN_B;
    else if (a == b)
        return 0;
    else
        return A_LESS_THAN_B;
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, DatumGetInt64(), x, and y.

Referenced by btint8sortsupport().

btint8sortsupport()

Datum btint8sortsupport

(

PG_FUNCTION_ARGS

)

Definition at line 162 of file nbtcompare.c.

{
    SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
 
#if SIZEOF_DATUM >= 8
    ssup->comparator = ssup_datum_signed_cmp;
#else
    ssup->comparator = btint8fastcmp;
#endif
    PG_RETURN_VOID();
}

References btint8fastcmp(), SortSupportData::comparator, PG_GETARG_POINTER, and PG_RETURN_VOID.

btoidcmp()

Datum btoidcmp

(

PG_FUNCTION_ARGS

)

Definition at line 259 of file nbtcompare.c.

{
    Oid         a = PG_GETARG_OID(0);
    Oid         b = PG_GETARG_OID(1);
 
    if (a > b)
        PG_RETURN_INT32(A_GREATER_THAN_B);
    else if (a == b)
        PG_RETURN_INT32(0);
    else
        PG_RETURN_INT32(A_LESS_THAN_B);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, PG_GETARG_OID, and PG_RETURN_INT32.

btoidfastcmp()

static int btoidfastcmp ( Datum  x, Datum  y, SortSupport  ssup  )

static

Definition at line 273 of file nbtcompare.c.

{
    Oid         a = DatumGetObjectId(x);
    Oid         b = DatumGetObjectId(y);
 
    if (a > b)
        return A_GREATER_THAN_B;
    else if (a == b)
        return 0;
    else
        return A_LESS_THAN_B;
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, DatumGetObjectId(), x, and y.

Referenced by btoidsortsupport().

btoidsortsupport()

Datum btoidsortsupport

(

PG_FUNCTION_ARGS

)

Definition at line 287 of file nbtcompare.c.

{
    SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
 
    ssup->comparator = btoidfastcmp;
    PG_RETURN_VOID();
}

References btoidfastcmp(), SortSupportData::comparator, PG_GETARG_POINTER, and PG_RETURN_VOID.

btoidvectorcmp()

Datum btoidvectorcmp

(

PG_FUNCTION_ARGS

)

Definition at line 296 of file nbtcompare.c.

{
    oidvector  *a = (oidvector *) PG_GETARG_POINTER(0);
    oidvector  *b = (oidvector *) PG_GETARG_POINTER(1);
    int         i;
 
    /* We arbitrarily choose to sort first by vector length */
    if (a->dim1 != b->dim1)
        PG_RETURN_INT32(a->dim1 - b->dim1);
 
    for (i = 0; i < a->dim1; i++)
    {
        if (a->values[i] != b->values[i])
        {
            if (a->values[i] > b->values[i])
                PG_RETURN_INT32(A_GREATER_THAN_B);
            else
                PG_RETURN_INT32(A_LESS_THAN_B);
        }
    }
    PG_RETURN_INT32(0);
}

References a, A_GREATER_THAN_B, A_LESS_THAN_B, b, i, PG_GETARG_POINTER, and PG_RETURN_INT32.

Referenced by oidvectoreq(), oidvectorge(), oidvectorgt(), oidvectorle(), oidvectorlt(), and oidvectorne().