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-rw-r--r--src/backend/utils/adt/varbit.c133
-rw-r--r--src/include/catalog/pg_proc.h11
-rw-r--r--src/include/utils/varbit.h4
-rw-r--r--src/test/regress/expected/bit.out12
4 files changed, 115 insertions, 45 deletions
diff --git a/src/backend/utils/adt/varbit.c b/src/backend/utils/adt/varbit.c
index 2fad9aba048..8779acddb43 100644
--- a/src/backend/utils/adt/varbit.c
+++ b/src/backend/utils/adt/varbit.c
@@ -9,7 +9,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/varbit.c,v 1.22 2002/06/20 20:29:38 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/varbit.c,v 1.23 2002/08/04 06:33:48 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@@ -98,8 +98,8 @@ bit_in(PG_FUNCTION_ARGS)
if (atttypmod <= 0)
atttypmod = bitlen;
else if (bitlen != atttypmod)
- elog(ERROR, "bit string length does not match type bit(%d)",
- atttypmod);
+ elog(ERROR, "Bit string length %d does not match type BIT(%d)",
+ bitlen, atttypmod);
len = VARBITTOTALLEN(atttypmod);
result = (VarBit *) palloc(len);
@@ -119,7 +119,7 @@ bit_in(PG_FUNCTION_ARGS)
if (*sp == '1')
*r |= x;
else if (*sp != '0')
- elog(ERROR, "cannot parse %c as a binary digit", *sp);
+ elog(ERROR, "Cannot parse '%c' as a binary digit", *sp);
x >>= 1;
if (x == 0)
{
@@ -140,7 +140,7 @@ bit_in(PG_FUNCTION_ARGS)
else if (*sp >= 'a' && *sp <= 'f')
x = (bits8) (*sp - 'a') + 10;
else
- elog(ERROR, "cannot parse %c as a hex digit", *sp);
+ elog(ERROR, "Cannot parse '%c' as a hex digit", *sp);
if (bc)
{
*r++ |= x;
@@ -214,8 +214,8 @@ bit(PG_FUNCTION_ARGS)
if (len <= 0 || len == VARBITLEN(arg))
PG_RETURN_VARBIT_P(arg);
else
- elog(ERROR, "bit string length does not match type bit(%d)",
- len);
+ elog(ERROR, "Bit string length %d does not match type BIT(%d)",
+ VARBITLEN(arg), len);
return 0; /* quiet compiler */
}
@@ -305,7 +305,7 @@ varbit_in(PG_FUNCTION_ARGS)
if (atttypmod <= 0)
atttypmod = bitlen;
else if (bitlen > atttypmod)
- elog(ERROR, "bit string too long for type bit varying(%d)",
+ elog(ERROR, "Bit string too long for type BIT VARYING(%d)",
atttypmod);
len = VARBITTOTALLEN(bitlen);
@@ -326,7 +326,7 @@ varbit_in(PG_FUNCTION_ARGS)
if (*sp == '1')
*r |= x;
else if (*sp != '0')
- elog(ERROR, "cannot parse %c as a binary digit", *sp);
+ elog(ERROR, "Cannot parse '%c' as a binary digit", *sp);
x >>= 1;
if (x == 0)
{
@@ -347,7 +347,7 @@ varbit_in(PG_FUNCTION_ARGS)
else if (*sp >= 'a' && *sp <= 'f')
x = (bits8) (*sp - 'a') + 10;
else
- elog(ERROR, "cannot parse %c as a hex digit", *sp);
+ elog(ERROR, "Cannot parse '%c' as a hex digit", *sp);
if (bc)
{
*r++ |= x;
@@ -420,7 +420,7 @@ varbit(PG_FUNCTION_ARGS)
PG_RETURN_VARBIT_P(arg);
if (len < VARBITLEN(arg))
- elog(ERROR, "bit string too long for type bit varying(%d)", len);
+ elog(ERROR, "Bit string too long for type BIT VARYING(%d)", len);
rlen = VARBITTOTALLEN(len);
result = (VarBit *) palloc(rlen);
@@ -812,7 +812,7 @@ bitand(PG_FUNCTION_ARGS)
bitlen1 = VARBITLEN(arg1);
bitlen2 = VARBITLEN(arg2);
if (bitlen1 != bitlen2)
- elog(ERROR, "cannot AND bit strings of different sizes");
+ elog(ERROR, "Cannot AND bit strings of different sizes");
len = VARSIZE(arg1);
result = (VarBit *) palloc(len);
VARATT_SIZEP(result) = len;
@@ -850,7 +850,7 @@ bitor(PG_FUNCTION_ARGS)
bitlen1 = VARBITLEN(arg1);
bitlen2 = VARBITLEN(arg2);
if (bitlen1 != bitlen2)
- elog(ERROR, "cannot OR bit strings of different sizes");
+ elog(ERROR, "Cannot OR bit strings of different sizes");
len = VARSIZE(arg1);
result = (VarBit *) palloc(len);
VARATT_SIZEP(result) = len;
@@ -894,7 +894,7 @@ bitxor(PG_FUNCTION_ARGS)
bitlen1 = VARBITLEN(arg1);
bitlen2 = VARBITLEN(arg2);
if (bitlen1 != bitlen2)
- elog(ERROR, "cannot XOR bit strings of different sizes");
+ elog(ERROR, "Cannot XOR bit strings of different sizes");
len = VARSIZE(arg1);
result = (VarBit *) palloc(len);
VARATT_SIZEP(result) = len;
@@ -1109,7 +1109,7 @@ bittoint4(PG_FUNCTION_ARGS)
/* Check that the bit string is not too long */
if (VARBITLEN(arg) > sizeof(int4) * BITS_PER_BYTE)
- elog(ERROR, "bit string is too large to fit in type integer");
+ elog(ERROR, "Bit string is too large to fit in type integer");
result = 0;
for (r = VARBITS(arg); r < VARBITEND(arg); r++)
{
@@ -1122,51 +1122,114 @@ bittoint4(PG_FUNCTION_ARGS)
PG_RETURN_INT32(result);
}
+Datum
+bitfromint8(PG_FUNCTION_ARGS)
+{
+#ifndef INT64_IS_BUSTED
+ int64 a = PG_GETARG_INT64(0);
+ VarBit *result;
+ bits8 *r;
+ int len;
+
+ /* allocate enough space for the bits in an int64 */
+ len = VARBITTOTALLEN(sizeof(a) * BITS_PER_BYTE);
+ result = (VarBit *) palloc(len);
+ VARATT_SIZEP(result) = len;
+ VARBITLEN(result) = sizeof(a) * BITS_PER_BYTE;
+
+ /*
+ * masks and shifts here are just too painful and we know that an int64
+ * has got 8 bytes
+ */
+ r = VARBITS(result);
+ r[0] = (bits8) ((a >> (7 * BITS_PER_BYTE)) & BITMASK);
+ r[1] = (bits8) ((a >> (6 * BITS_PER_BYTE)) & BITMASK);
+ r[2] = (bits8) ((a >> (5 * BITS_PER_BYTE)) & BITMASK);
+ r[3] = (bits8) ((a >> (4 * BITS_PER_BYTE)) & BITMASK);
+ r[4] = (bits8) ((a >> (3 * BITS_PER_BYTE)) & BITMASK);
+ r[5] = (bits8) ((a >> (2 * BITS_PER_BYTE)) & BITMASK);
+ r[6] = (bits8) ((a >> (1 * BITS_PER_BYTE)) & BITMASK);
+ r[7] = (bits8) (a & BITMASK);
+
+ PG_RETURN_VARBIT_P(result);
+#else
+ elog(ERROR, "INT64 is not supported on this platform");
+ PG_RETURN_NULL();
+#endif
+}
+
+Datum
+bittoint8(PG_FUNCTION_ARGS)
+{
+#ifndef INT64_IS_BUSTED
+ VarBit *arg = PG_GETARG_VARBIT_P(0);
+ uint64 result;
+ bits8 *r;
+
+ /* Check that the bit string is not too long */
+ if (VARBITLEN(arg) > sizeof(result) * BITS_PER_BYTE)
+ elog(ERROR, "Bit string is too large to fit in type int64");
+ result = 0;
+ for (r = VARBITS(arg); r < VARBITEND(arg); r++)
+ {
+ result <<= BITS_PER_BYTE;
+ result |= *r;
+ }
+ /* Now shift the result to take account of the padding at the end */
+ result >>= VARBITPAD(arg);
+
+ PG_RETURN_INT64(result);
+#else
+ elog(ERROR, "INT64 is not supported on this platform");
+ PG_RETURN_NULL();
+#endif
+}
/* Determines the position of S2 in the bitstring S1 (1-based string).
* If S2 does not appear in S1 this function returns 0.
* If S2 is of length 0 this function returns 1.
+ * Compatible in usage with POSITION() functions for other data types.
*/
Datum
bitposition(PG_FUNCTION_ARGS)
{
+ VarBit *str = PG_GETARG_VARBIT_P(0);
VarBit *substr = PG_GETARG_VARBIT_P(1);
- VarBit *arg = PG_GETARG_VARBIT_P(0);
int substr_length,
- arg_length,
+ str_length,
i,
is;
bits8 *s, /* pointer into substring */
- *p; /* pointer into arg */
+ *p; /* pointer into str */
bits8 cmp, /* shifted substring byte to compare */
mask1, /* mask for substring byte shifted right */
mask2, /* mask for substring byte shifted left */
end_mask, /* pad mask for last substring byte */
- arg_mask; /* pad mask for last argument byte */
+ str_mask; /* pad mask for last string byte */
bool is_match;
/* Get the substring length */
substr_length = VARBITLEN(substr);
- arg_length = VARBITLEN(arg);
+ str_length = VARBITLEN(str);
- /* Argument has 0 length or substring longer than argument, return 0 */
- if (arg_length == 0 || substr_length > arg_length)
+ /* String has zero length or substring longer than string, return 0 */
+ if ((str_length == 0) || (substr_length > str_length))
PG_RETURN_INT32(0);
- /* 0-length means return 1 */
+ /* zero-length substring means return 1 */
if (substr_length == 0)
PG_RETURN_INT32(1);
/* Initialise the padding masks */
end_mask = BITMASK << VARBITPAD(substr);
- arg_mask = BITMASK << VARBITPAD(arg);
- for (i = 0; i < VARBITBYTES(arg) - VARBITBYTES(substr) + 1; i++)
+ str_mask = BITMASK << VARBITPAD(str);
+ for (i = 0; i < VARBITBYTES(str) - VARBITBYTES(substr) + 1; i++)
{
for (is = 0; is < BITS_PER_BYTE; is++)
{
is_match = true;
- p = VARBITS(arg) + i;
+ p = VARBITS(str) + i;
mask1 = BITMASK >> is;
mask2 = ~mask1;
for (s = VARBITS(substr);
@@ -1176,15 +1239,15 @@ bitposition(PG_FUNCTION_ARGS)
if (s == VARBITEND(substr) - 1)
{
mask1 &= end_mask >> is;
- if (p == VARBITEND(arg) - 1)
+ if (p == VARBITEND(str) - 1)
{
- /* Check that there is enough of arg left */
- if (mask1 & ~arg_mask)
+ /* Check that there is enough of str left */
+ if (mask1 & ~str_mask)
{
is_match = false;
break;
}
- mask1 &= arg_mask;
+ mask1 &= str_mask;
}
}
is_match = ((cmp ^ *p) & mask1) == 0;
@@ -1192,7 +1255,7 @@ bitposition(PG_FUNCTION_ARGS)
break;
/* Move on to the next byte */
p++;
- if (p == VARBITEND(arg))
+ if (p == VARBITEND(str))
{
mask2 = end_mask << (BITS_PER_BYTE - is);
is_match = mask2 == 0;
@@ -1206,19 +1269,19 @@ bitposition(PG_FUNCTION_ARGS)
if (s == VARBITEND(substr) - 1)
{
mask2 &= end_mask << (BITS_PER_BYTE - is);
- if (p == VARBITEND(arg) - 1)
+ if (p == VARBITEND(str) - 1)
{
- if (mask2 & ~arg_mask)
+ if (mask2 & ~str_mask)
{
is_match = false;
break;
}
- mask2 &= arg_mask;
+ mask2 &= str_mask;
}
}
is_match = ((cmp ^ *p) & mask2) == 0;
}
- /* Have we found a match */
+ /* Have we found a match? */
if (is_match)
PG_RETURN_INT32(i * BITS_PER_BYTE + is + 1);
}
diff --git a/src/include/catalog/pg_proc.h b/src/include/catalog/pg_proc.h
index 2c5979f9a45..143d45a18a0 100644
--- a/src/include/catalog/pg_proc.h
+++ b/src/include/catalog/pg_proc.h
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: pg_proc.h,v 1.248 2002/07/31 01:49:13 momjian Exp $
+ * $Id: pg_proc.h,v 1.249 2002/08/04 06:33:54 thomas Exp $
*
* NOTES
* The script catalog/genbki.sh reads this file and generates .bki
@@ -2236,9 +2236,9 @@ DATA(insert OID = 1681 ( length PGNSP PGUID 12 f f t f i 1 23 "1560" bitlengt
DESCR("bitstring length");
DATA(insert OID = 1682 ( octet_length PGNSP PGUID 12 f f t f i 1 23 "1560" bitoctetlength - _null_ ));
DESCR("octet length");
-DATA(insert OID = 1683 ( bitfromint4 PGNSP PGUID 12 f f t f i 1 1560 "23" bitfromint4 - _null_ ));
+DATA(insert OID = 1683 ( bit PGNSP PGUID 12 f f t f i 1 1560 "23" bitfromint4 - _null_ ));
DESCR("int4 to bitstring");
-DATA(insert OID = 1684 ( bittoint4 PGNSP PGUID 12 f f t f i 1 23 "1560" bittoint4 - _null_ ));
+DATA(insert OID = 1684 ( int4 PGNSP PGUID 12 f f t f i 1 23 "1560" bittoint4 - _null_ ));
DESCR("bitstring to int4");
DATA(insert OID = 1685 ( bit PGNSP PGUID 12 f f t f i 2 1560 "1560 23" bit - _null_ ));
@@ -2873,6 +2873,11 @@ DESCR("substitutes regular expression");
DATA(insert OID = 2074 ( substring PGNSP PGUID 14 f f t f i 3 25 "25 25 25" "select substring($1, like_escape($2, $3))" - _null_ ));
DESCR("substitutes regular expression with escape argument");
+DATA(insert OID = 2075 ( bit PGNSP PGUID 12 f f t f i 1 1560 "20" bitfromint8 - _null_ ));
+DESCR("int8 to bitstring");
+DATA(insert OID = 2076 ( int8 PGNSP PGUID 12 f f t f i 1 20 "1560" bittoint8 - _null_ ));
+DESCR("bitstring to int8");
+
DATA(insert OID = 2090 ( current_setting PGNSP PGUID 12 f f t f s 1 25 "25" show_config_by_name - _null_ ));
DESCR("SHOW X as a function");
DATA(insert OID = 2091 ( set_config PGNSP PGUID 12 f f f f v 3 25 "25 25 16" set_config_by_name - _null_ ));
diff --git a/src/include/utils/varbit.h b/src/include/utils/varbit.h
index 42ea863151e..8dff3166d56 100644
--- a/src/include/utils/varbit.h
+++ b/src/include/utils/varbit.h
@@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: varbit.h,v 1.14 2002/06/20 20:29:53 momjian Exp $
+ * $Id: varbit.h,v 1.15 2002/08/04 06:33:56 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@@ -88,6 +88,8 @@ extern Datum bitlength(PG_FUNCTION_ARGS);
extern Datum bitoctetlength(PG_FUNCTION_ARGS);
extern Datum bitfromint4(PG_FUNCTION_ARGS);
extern Datum bittoint4(PG_FUNCTION_ARGS);
+extern Datum bitfromint8(PG_FUNCTION_ARGS);
+extern Datum bittoint8(PG_FUNCTION_ARGS);
extern Datum bitposition(PG_FUNCTION_ARGS);
#endif
diff --git a/src/test/regress/expected/bit.out b/src/test/regress/expected/bit.out
index 4821a1d3daf..310edf3bc3e 100644
--- a/src/test/regress/expected/bit.out
+++ b/src/test/regress/expected/bit.out
@@ -6,12 +6,12 @@
--
CREATE TABLE BIT_TABLE(b BIT(11));
INSERT INTO BIT_TABLE VALUES (B'10'); -- too short
-ERROR: bit string length does not match type bit(11)
+ERROR: Bit string length 2 does not match type BIT(11)
INSERT INTO BIT_TABLE VALUES (B'00000000000');
INSERT INTO BIT_TABLE VALUES (B'11011000000');
INSERT INTO BIT_TABLE VALUES (B'01010101010');
INSERT INTO BIT_TABLE VALUES (B'101011111010'); -- too long
-ERROR: bit string length does not match type bit(11)
+ERROR: Bit string length 12 does not match type BIT(11)
--INSERT INTO BIT_TABLE VALUES ('X554');
--INSERT INTO BIT_TABLE VALUES ('X555');
SELECT * FROM BIT_TABLE;
@@ -28,7 +28,7 @@ INSERT INTO VARBIT_TABLE VALUES (B'0');
INSERT INTO VARBIT_TABLE VALUES (B'010101');
INSERT INTO VARBIT_TABLE VALUES (B'01010101010');
INSERT INTO VARBIT_TABLE VALUES (B'101011111010'); -- too long
-ERROR: bit string too long for type bit varying(11)
+ERROR: Bit string too long for type BIT VARYING(11)
--INSERT INTO VARBIT_TABLE VALUES ('X554');
--INSERT INTO VARBIT_TABLE VALUES ('X555');
SELECT * FROM VARBIT_TABLE;
@@ -212,11 +212,11 @@ SELECT a,a<<4 AS "a<<4",b,b>>2 AS "b>>2" FROM bit_table;
DROP TABLE bit_table;
-- The following should fail
select B'001' & B'10';
-ERROR: cannot AND bit strings of different sizes
+ERROR: Cannot AND bit strings of different sizes
select B'0111' | B'011';
-ERROR: cannot OR bit strings of different sizes
+ERROR: Cannot OR bit strings of different sizes
select B'0010' # B'011101';
-ERROR: cannot XOR bit strings of different sizes
+ERROR: Cannot XOR bit strings of different sizes
-- More position tests, checking all the boundary cases
SELECT POSITION(B'1010' IN B'0000101'); -- 0
position
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-31 17:08:11 +0000