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51cfdae50f
here is an updated version of the bit type with a bugfix and all the necessa ry SQL functions defined. This should replace what is currently in contrib. I'd appreciate any comments on what is there. Kind regards, Adriaan
53 lines
1.9 KiB
C
53 lines
1.9 KiB
C
#include "c.h"
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#include "postgres.h"
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#define HEXDIG(z) (z)<10 ? ((z)+'0') : ((z)-10+'A')
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/* Modeled on struct varlena from postgres.h, bu data type is bits8 */
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struct varbita
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{
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int32 vl_len;
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bits8 vl_dat[1];
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};
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#define BITSPERBYTE 8
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#define VARBITHDRSZ sizeof(int32)
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/* Number of bits in this bit string */
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#define VARBITLEN(PTR) (((struct varbita *)VARDATA(PTR))->vl_len)
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/* Pointer tp the first byte containing bit string data */
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#define VARBITS(PTR) (((struct varbita *)VARDATA(PTR))->vl_dat)
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/* Number of bytes in the data section of a bit string */
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#define VARBITBYTES(PTR) (VARSIZE(PTR) - VARHDRSZ - VARBITHDRSZ)
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/* Padding of the bit string at the end */
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#define VARBITPAD(PTR) (VARBITBYTES(PTR)*BITSPERBYTE - VARBITLEN(PTR))
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/* Number of bytes needed to store a bit string of a given length */
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#define VARBITDATALEN(BITLEN) (BITLEN/BITSPERBYTE + \
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(BITLEN%BITSPERBYTE > 0 ? 1 : 0) + \
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VARHDRSZ + VARBITHDRSZ)
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/* pointer beyond the end of the bit string (like end() in STL containers) */
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#define VARBITEND(PTR) ((bits8 *) (PTR + VARSIZE(PTR)))
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/* Mask that will cover exactly one byte, i.e. BITSPERBYTE bits */
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#define BITMASK 0xFF
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#define BITHIGH 0x80
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bits8 * zpbitin(char *s, int dummy, int32 atttypmod);
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char * zpbitout(bits8 *s);
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char * zpbitsout(bits8 *s);
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bits8 * varbitin(char *s, int dummy, int32 atttypmod);
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bool biteq (bits8 *arg1, bits8 *arg2);
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bool bitne (bits8 *arg1, bits8 *arg2);
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bool bitge (bits8 *arg1, bits8 *arg2);
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bool bitgt (bits8 *arg1, bits8 *arg2);
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bool bitle (bits8 *arg1, bits8 *arg2);
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bool bitlt (bits8 *arg1, bits8 *arg2);
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int bitcmp (bits8 *arg1, bits8 *arg2);
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bits8 * bitand (bits8 * arg1, bits8 * arg2);
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bits8 * bitor (bits8 * arg1, bits8 * arg2);
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bits8 * bitxor (bits8 * arg1, bits8 * arg2);
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bits8 * bitnot (bits8 * arg);
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bits8 * bitshiftright (bits8 * arg, int shft);
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bits8 * bitshiftleft (bits8 * arg, int shft);
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bits8 * bitcat (bits8 *arg1, bits8 *arg2);
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bits8 * bitsubstr (bits8 *arg, int32 s, int32 l);
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