diff options
Diffstat (limited to 'contrib/bit/varbit.c')
-rw-r--r-- | contrib/bit/varbit.c | 1365 |
1 files changed, 715 insertions, 650 deletions
diff --git a/contrib/bit/varbit.c b/contrib/bit/varbit.c index 2a677ec6040..20caaf9f7cb 100644 --- a/contrib/bit/varbit.c +++ b/contrib/bit/varbit.c @@ -4,7 +4,7 @@ * Functions for the built-in type bit() and varying bit(). * * IDENTIFICATION - * $Header: /cvsroot/pgsql/contrib/bit/Attic/varbit.c,v 1.2 2000/04/03 20:56:40 momjian Exp $ + * $Header: /cvsroot/pgsql/contrib/bit/Attic/varbit.c,v 1.3 2000/04/12 17:14:21 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -14,19 +14,19 @@ /*#include "utils/builtins.h" */ -/* +/* Prefixes: - zp -- zero-padded fixed length bit string - var -- varying bit string + zp -- zero-padded fixed length bit string + var -- varying bit string attypmod -- contains the length of the bit string in bits, or for - varying bits the maximum length. + varying bits the maximum length. The data structure contains the following elements: - header -- length of the whole data structure (incl header) - in bytes. (as with all varying length datatypes) - data section -- private data section for the bits data structures - bitlength -- lenght of the bit string in bits + header -- length of the whole data structure (incl header) + in bytes. (as with all varying length datatypes) + data section -- private data section for the bits data structures + bitlength -- lenght of the bit string in bits bitdata -- least significant byte first string */ @@ -34,214 +34,241 @@ * zpbitin - * converts a string to the internal representation of a bitstring. - * The length is determined by the number of bits required plus - * VARHDRSZ bytes or from atttypmod. - * (XXX dummy is here because we pass typelem as the second argument - * for array_in. copied this, no idea what it means??) + * The length is determined by the number of bits required plus + * VARHDRSZ bytes or from atttypmod. + * (XXX dummy is here because we pass typelem as the second argument + * for array_in. copied this, no idea what it means??) */ bits8 * -zpbitin(char *s, int dummy, int32 atttypmod) +zpbitin(char *s, int dummy, int32 atttypmod) { - bits8 *result; /* the bits string that was read in */ - char *sp; /* pointer into the character string */ - bits8 *r; - int len, /* Length of the whole data structure */ - bitlen, /* Number of bits in the bit string */ - slen; /* Length of the input string */ - int bit_not_hex = 0; /* 0 = hex string 1=bit string */ - int bc, ipad; - bits8 x = 0; - - - if (s == NULL) - return (bits8 *) NULL; - - /* Check that the first character is a b or an x */ - if (s[0]=='b' || s[0]=='B') - bit_not_hex = 1; - else if (s[0]=='x' || s[0]=='X') - bit_not_hex = 0; - else - elog(ERROR, "zpbitin: %s is not a valid bitstring",s); - - slen = strlen(s) - 1; - /* Determine bitlength from input string */ - bitlen = slen; - if (!bit_not_hex) - bitlen *= 4; - - /* Sometimes atttypmod is not supplied. If it is supplied we need to make - sure that the bitstring fits. Note that the number of infered bits can - be larger than the number of actual bits needed, but only if we are - reading a hex string and not by more than 3 bits, as a hex string gives - and accurate length upto 4 bits */ - if (atttypmod == -1) - atttypmod = bitlen; - else - if ((bitlen>atttypmod && bit_not_hex) || - (bitlen>atttypmod+3 && !bit_not_hex)) - elog(ERROR, "zpbitin: bit string of size %d cannot be written into bits(%d)", - bitlen,atttypmod); - - - len = VARBITDATALEN(atttypmod); - - if (len > MaxAttrSize) - elog(ERROR, "zpbitin: length of bit() must be less than %ld", - (MaxAttrSize-VARHDRSZ-VARBITHDRSZ)*BITSPERBYTE); - - result = (bits8 *) palloc(len); - /* set to 0 so that *r is always initialised and strin is zero-padded */ - memset(result, 0, len); - VARSIZE(result) = len; - VARBITLEN(result) = atttypmod; - - /* We need to read the bitstring from the end, as we store it least - significant byte first. s points to the byte before the beginning - of the bitstring */ - sp = s+1; - r = VARBITS(result); - if (bit_not_hex) - { - /* Parse the bit representation of the string */ - /* We know it fits, as bitlen was compared to atttypmod */ - x = BITHIGH; - for (bc = 0; sp != s+slen+1; sp++, bc++) + bits8 *result; /* the bits string that was read in */ + char *sp; /* pointer into the character string */ + bits8 *r; + int len, /* Length of the whole data structure */ + bitlen, /* Number of bits in the bit string */ + slen; /* Length of the input string */ + int bit_not_hex = 0;/* 0 = hex string 1=bit string */ + int bc, + ipad; + bits8 x = 0; + + + if (s == NULL) + return (bits8 *) NULL; + + /* Check that the first character is a b or an x */ + if (s[0] == 'b' || s[0] == 'B') + bit_not_hex = 1; + else if (s[0] == 'x' || s[0] == 'X') + bit_not_hex = 0; + else + elog(ERROR, "zpbitin: %s is not a valid bitstring", s); + + slen = strlen(s) - 1; + /* Determine bitlength from input string */ + bitlen = slen; + if (!bit_not_hex) + bitlen *= 4; + + /* + * Sometimes atttypmod is not supplied. If it is supplied we need to + * make sure that the bitstring fits. Note that the number of infered + * bits can be larger than the number of actual bits needed, but only + * if we are reading a hex string and not by more than 3 bits, as a + * hex string gives and accurate length upto 4 bits + */ + if (atttypmod == -1) + atttypmod = bitlen; + else if ((bitlen > atttypmod && bit_not_hex) || + (bitlen > atttypmod + 3 && !bit_not_hex)) + elog(ERROR, "zpbitin: bit string of size %d cannot be written into bits(%d)", + bitlen, atttypmod); + + + len = VARBITDATALEN(atttypmod); + + if (len > MaxAttrSize) + elog(ERROR, "zpbitin: length of bit() must be less than %ld", + (MaxAttrSize - VARHDRSZ - VARBITHDRSZ) * BITSPERBYTE); + + result = (bits8 *) palloc(len); + /* set to 0 so that *r is always initialised and strin is zero-padded */ + memset(result, 0, len); + VARSIZE(result) = len; + VARBITLEN(result) = atttypmod; + + /* + * We need to read the bitstring from the end, as we store it least + * significant byte first. s points to the byte before the beginning + * of the bitstring + */ + sp = s + 1; + r = VARBITS(result); + if (bit_not_hex) + { + /* Parse the bit representation of the string */ + /* We know it fits, as bitlen was compared to atttypmod */ + x = BITHIGH; + for (bc = 0; sp != s + slen + 1; sp++, bc++) + { + if (*sp == '1') + *r |= x; + if (bc == 7) + { + bc = 0; + x = BITHIGH; + r++; + } + else + x >>= 1; + } + } + else { - if (*sp=='1') - *r |= x; - if (bc==7) { - bc = 0; - x = BITHIGH; - r++; - } else - x >>= 1; + /* Parse the hex representation of the string */ + for (bc = 0; sp != s + slen + 1; sp++) + { + if (*sp >= '0' && *sp <= '9') + x = (bits8) (*sp - '0'); + else if (*sp >= 'A' && *sp <= 'F') + x = (bits8) (*sp - 'A') + 10; + else if (*sp >= 'a' && *sp <= 'f') + x = (bits8) (*sp - 'a') + 10; + else + elog(ERROR, "Cannot parse %c as a hex digit", *sp); + if (bc) + { + bc = 0; + *r++ |= x; + } + else + { + bc++; + *r = x << 4; + } + } } - } - else - { - /* Parse the hex representation of the string */ - for (bc = 0; sp != s+slen+1; sp++) + + if (bitlen > atttypmod) { - if (*sp>='0' && *sp<='9') - x = (bits8) (*sp - '0'); - else if (*sp>='A' && *sp<='F') - x = (bits8) (*sp - 'A') + 10; - else if (*sp>='a' && *sp<='f') - x = (bits8) (*sp - 'a') + 10; - else - elog(ERROR,"Cannot parse %c as a hex digit",*sp); - if (bc) { - bc = 0; - *r++ |= x; - } else { - bc++; - *r = x<<4; - } + /* Check that this fitted */ + r = (bits8 *) (result + len - 1); + ipad = VARBITPAD(result); + + /* + * The bottom ipad bits of the byte pointed to by r need to be + * zero + */ + + /* + * printf("Byte %X shift %X %d\n",*r,(*r << (8-ipad)) & BITMASK, + * (*r << (8-ipad)) & BITMASK > 0); + */ + if (((*r << (BITSPERBYTE - ipad)) & BITMASK) > 0) + elog(ERROR, "zpbitin: bit string too large for bit(%d) data type", + atttypmod); } - } - - if (bitlen > atttypmod) { - /* Check that this fitted */ - r = (bits8 *) (result + len - 1); - ipad = VARBITPAD(result); - /* The bottom ipad bits of the byte pointed to by r need to be zero */ - /* printf("Byte %X shift %X %d\n",*r,(*r << (8-ipad)) & BITMASK, - (*r << (8-ipad)) & BITMASK > 0); - */ - if (((*r << (BITSPERBYTE-ipad)) & BITMASK) > 0) - elog(ERROR, "zpbitin: bit string too large for bit(%d) data type", - atttypmod); - } - - return result; + + return result; } /* zpbitout - - * for the time being we print everything as hex strings, as this is likely - * to be more compact than bit strings, and consequently much more efficient - * for long strings + * for the time being we print everything as hex strings, as this is likely + * to be more compact than bit strings, and consequently much more efficient + * for long strings */ char * zpbitout(bits8 *s) { - char *result, *r; - bits8 *sp; - int i, len, bitlen; - - if (s == NULL) - { - result = (char *) palloc(2); - result[0] = '-'; - result[1] = '\0'; - } - else - { - bitlen = VARBITLEN(s); - len = bitlen/4 + (bitlen%4>0 ? 1 : 0); - result = (char *) palloc(len + 4); - sp = VARBITS(s); - r = result; - *r++ = 'X'; - *r++ = '\''; - /* we cheat by knowing that we store full bytes zero padded */ - for (i=0; i<len; i+=2, sp++) { - *r++ = HEXDIG((*sp)>>4); - *r++ = HEXDIG((*sp) & 0xF); - } - /* Go back one step if we printed a hex number that was not part - of the bitstring anymore */ - if (i==len+1) - r--; - *r++ = '\''; - *r = '\0'; - } - return result; + char *result, + *r; + bits8 *sp; + int i, + len, + bitlen; + + if (s == NULL) + { + result = (char *) palloc(2); + result[0] = '-'; + result[1] = '\0'; + } + else + { + bitlen = VARBITLEN(s); + len = bitlen / 4 + (bitlen % 4 > 0 ? 1 : 0); + result = (char *) palloc(len + 4); + sp = VARBITS(s); + r = result; + *r++ = 'X'; + *r++ = '\''; + /* we cheat by knowing that we store full bytes zero padded */ + for (i = 0; i < len; i += 2, sp++) + { + *r++ = HEXDIG((*sp) >> 4); + *r++ = HEXDIG((*sp) & 0xF); + } + + /* + * Go back one step if we printed a hex number that was not part + * of the bitstring anymore + */ + if (i == len + 1) + r--; + *r++ = '\''; + *r = '\0'; + } + return result; } /* zpbitsout - - * Prints the string a bits + * Prints the string a bits */ char * zpbitsout(bits8 *s) { - char *result, *r; - bits8 *sp; - bits8 x; - int i, k, len; - - if (s == NULL) - { - result = (char *) palloc(2); - result[0] = '-'; - result[1] = '\0'; - } - else - { - len = VARBITLEN(s); - result = (char *) palloc(len + 4); - sp = VARBITS(s); - r = result; - *r++ = 'B'; - *r++ = '\''; - for (i=0; i<len-BITSPERBYTE; i+=BITSPERBYTE, sp++) { - x = *sp; - for (k=0; k<BITSPERBYTE; k++) - { - *r++ = (x & BITHIGH) ? '1' : '0'; - x <<= 1; - } - } - x = *sp; - for (k=i; k<len; k++) + char *result, + *r; + bits8 *sp; + bits8 x; + int i, + k, + len; + + if (s == NULL) { - *r++ = (x & BITHIGH) ? '1' : '0'; - x <<= 1; + result = (char *) palloc(2); + result[0] = '-'; + result[1] = '\0'; } - *r++ = '\''; - *r = '\0'; - } - return result; + else + { + len = VARBITLEN(s); + result = (char *) palloc(len + 4); + sp = VARBITS(s); + r = result; + *r++ = 'B'; + *r++ = '\''; + for (i = 0; i < len - BITSPERBYTE; i += BITSPERBYTE, sp++) + { + x = *sp; + for (k = 0; k < BITSPERBYTE; k++) + { + *r++ = (x & BITHIGH) ? '1' : '0'; + x <<= 1; + } + } + x = *sp; + for (k = i; k < len; k++) + { + *r++ = (x & BITHIGH) ? '1' : '0'; + x <<= 1; + } + *r++ = '\''; + *r = '\0'; + } + return result; } @@ -250,118 +277,133 @@ zpbitsout(bits8 *s) * converts a string to the internal representation of a bitstring. */ bits8 * -varbitin(char *s, int dummy, int32 atttypmod) +varbitin(char *s, int dummy, int32 atttypmod) { - bits8 *result; /* The resulting bit string */ - char *sp; /* pointer into the character string */ - bits8 *r; - int len, /* Length of the whole data structure */ - bitlen, /* Number of bits in the bit string */ - slen; /* Length of the input string */ - int bit_not_hex = 0; - int bc, ipad; - bits8 x = 0; - - - if (s == NULL) - return (bits8 *) NULL; - - /* Check that the first character is a b or an x */ - if (s[0]=='b' || s[0]=='B') - bit_not_hex = 1; - else if (s[0]=='x' || s[0]=='X') - bit_not_hex = 0; - else - elog(ERROR, "zpbitin: %s is not a valid bitstring",s); - - slen = strlen(s) - 1; - /* Determine bitlength from input string */ - bitlen = slen; - if (!bit_not_hex) - bitlen *= 4; - - /* Sometimes atttypmod is not supplied. If it is supplied we need to make - sure that the bitstring fits. Note that the number of infered bits can - be larger than the number of actual bits needed, but only if we are - reading a hex string and not by more than 3 bits, as a hex string gives - and accurate length upto 4 bits */ - if (atttypmod > -1) - if ((bitlen>atttypmod && bit_not_hex) || - (bitlen>atttypmod+3 && !bit_not_hex)) - elog(ERROR, "varbitin: bit string of size %d cannot be written into varying bits(%d)", - bitlen,atttypmod); - - - len = VARBITDATALEN(bitlen); - - if (len > MaxAttrSize) - elog(ERROR, "varbitin: length of bit() must be less than %ld", - (MaxAttrSize-VARHDRSZ-VARBITHDRSZ)*BITSPERBYTE); - - result = (bits8 *) palloc(len); - /* set to 0 so that *r is always initialised and strin is zero-padded */ - memset(result, 0, len); - VARSIZE(result) = len; - VARBITLEN(result) = bitlen; - - /* We need to read the bitstring from the end, as we store it least - significant byte first. s points to the byte before the beginning - of the bitstring */ - sp = s + 1; - r = VARBITS(result); - if (bit_not_hex) - { - /* Parse the bit representation of the string */ - x = BITHIGH; - for (bc = 0; sp != s+slen+1; sp++, bc++) + bits8 *result; /* The resulting bit string */ + char *sp; /* pointer into the character string */ + bits8 *r; + int len, /* Length of the whole data structure */ + bitlen, /* Number of bits in the bit string */ + slen; /* Length of the input string */ + int bit_not_hex = 0; + int bc, + ipad; + bits8 x = 0; + + + if (s == NULL) + return (bits8 *) NULL; + + /* Check that the first character is a b or an x */ + if (s[0] == 'b' || s[0] == 'B') + bit_not_hex = 1; + else if (s[0] == 'x' || s[0] == 'X') + bit_not_hex = 0; + else + elog(ERROR, "zpbitin: %s is not a valid bitstring", s); + + slen = strlen(s) - 1; + /* Determine bitlength from input string */ + bitlen = slen; + if (!bit_not_hex) + bitlen *= 4; + + /* + * Sometimes atttypmod is not supplied. If it is supplied we need to + * make sure that the bitstring fits. Note that the number of infered + * bits can be larger than the number of actual bits needed, but only + * if we are reading a hex string and not by more than 3 bits, as a + * hex string gives and accurate length upto 4 bits + */ + if (atttypmod > -1) + if ((bitlen > atttypmod && bit_not_hex) || + (bitlen > atttypmod + 3 && !bit_not_hex)) + elog(ERROR, "varbitin: bit string of size %d cannot be written into varying bits(%d)", + bitlen, atttypmod); + + + len = VARBITDATALEN(bitlen); + + if (len > MaxAttrSize) + elog(ERROR, "varbitin: length of bit() must be less than %ld", + (MaxAttrSize - VARHDRSZ - VARBITHDRSZ) * BITSPERBYTE); + + result = (bits8 *) palloc(len); + /* set to 0 so that *r is always initialised and strin is zero-padded */ + memset(result, 0, len); + VARSIZE(result) = len; + VARBITLEN(result) = bitlen; + + /* + * We need to read the bitstring from the end, as we store it least + * significant byte first. s points to the byte before the beginning + * of the bitstring + */ + sp = s + 1; + r = VARBITS(result); + if (bit_not_hex) + { + /* Parse the bit representation of the string */ + x = BITHIGH; + for (bc = 0; sp != s + slen + 1; sp++, bc++) + { + if (*sp == '1') + *r |= x; + if (bc == 7) + { + bc = 0; + x = BITHIGH; + r++; + } + else + x >>= 1; + } + } + else { - if (*sp=='1') - *r |= x; - if (bc==7) { - bc = 0; - x = BITHIGH; - r++; - } else - x >>= 1; + for (bc = 0; sp != s + slen + 1; sp++) + { + if (*sp >= '0' && *sp <= '9') + x = (bits8) (*sp - '0'); + else if (*sp >= 'A' && *sp <= 'F') + x = (bits8) (*sp - 'A') + 10; + else if (*sp >= 'a' && *sp <= 'f') + x = (bits8) (*sp - 'a') + 10; + else + elog(ERROR, "Cannot parse %c as a hex digit", *sp); + if (bc) + { + bc = 0; + *r++ |= x; + } + else + { + bc++; + *r = x << 4; + } + } } - } - else - { - for (bc = 0; sp != s+slen+1; sp++) + + if (bitlen > atttypmod) { - if (*sp>='0' && *sp<='9') - x = (bits8) (*sp - '0'); - else if (*sp>='A' && *sp<='F') - x = (bits8) (*sp - 'A') + 10; - else if (*sp>='a' && *sp<='f') - x = (bits8) (*sp - 'a') + 10; - else - elog(ERROR,"Cannot parse %c as a hex digit",*sp); - if (bc) { - bc = 0; - *r++ |= x; - } else { - bc++; - *r = x<<4; - } + /* Check that this fitted */ + r = (bits8 *) (result + len - 1); + ipad = VARBITPAD(result); + + /* + * The bottom ipad bits of the byte pointed to by r need to be + * zero + */ + if (((*r << (BITSPERBYTE - ipad)) & BITMASK) > 0) + elog(ERROR, "varbitin: bit string too large for varying bit(%d) data type", + atttypmod); } - } - - if (bitlen > atttypmod) { - /* Check that this fitted */ - r = (bits8 *) (result + len - 1); - ipad = VARBITPAD(result); - /* The bottom ipad bits of the byte pointed to by r need to be zero */ - if (((*r << (BITSPERBYTE-ipad)) & BITMASK) > 0) - elog(ERROR, "varbitin: bit string too large for varying bit(%d) data type", - atttypmod); - } - - return result; + + return result; } /* - the zpbitout routines are fine for varying bits as well + the zpbitout routines are fine for varying bits as well */ @@ -369,228 +411,244 @@ varbitin(char *s, int dummy, int32 atttypmod) * Comparison operators * * We only need one set of comparison operators for bitstrings, as the lengths - * are stored in the same way for zero-padded and varying bit strings. + * are stored in the same way for zero-padded and varying bit strings. * - * Note that the standard is not unambiguous about the comparison between + * Note that the standard is not unambiguous about the comparison between * zero-padded bit strings and varying bitstrings. If the same value is written - * into a zero padded bitstring as into a varying bitstring, but the zero - * padded bitstring has greater length, it will be bigger. + * into a zero padded bitstring as into a varying bitstring, but the zero + * padded bitstring has greater length, it will be bigger. * * Zeros from the beginning of a bitstring cannot simply be ignored, as they * may be part of a bit string and may be significant. */ bool -biteq (bits8 *arg1, bits8 *arg2) +biteq(bits8 *arg1, bits8 *arg2) { - int bitlen1, - bitlen2; - - if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) - return (bool) 0; - bitlen1 = VARBITLEN(arg1); - bitlen2 = VARBITLEN(arg2); - if (bitlen1 != bitlen2) - return (bool) 0; - - /* bit strings are always stored in a full number of bytes */ - return memcmp((void *)VARBITS(arg1),(void *)VARBITS(arg2), - VARBITBYTES(arg1)) == 0; + int bitlen1, + bitlen2; + + if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) + return (bool) 0; + bitlen1 = VARBITLEN(arg1); + bitlen2 = VARBITLEN(arg2); + if (bitlen1 != bitlen2) + return (bool) 0; + + /* bit strings are always stored in a full number of bytes */ + return memcmp((void *) VARBITS(arg1), (void *) VARBITS(arg2), + VARBITBYTES(arg1)) == 0; } bool -bitne (bits8 *arg1, bits8 *arg2) +bitne(bits8 *arg1, bits8 *arg2) { - int bitlen1, - bitlen2; - - if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) - return (bool) 0; - bitlen1 = VARBITLEN(arg1); - bitlen2 = VARBITLEN(arg2); - if (bitlen1 != bitlen2) - return (bool) 1; - - /* bit strings are always stored in a full number of bytes */ - return memcmp((void *)VARBITS(arg1),(void *)VARBITS(arg2), - VARBITBYTES(arg1)) != 0; + int bitlen1, + bitlen2; + + if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) + return (bool) 0; + bitlen1 = VARBITLEN(arg1); + bitlen2 = VARBITLEN(arg2); + if (bitlen1 != bitlen2) + return (bool) 1; + + /* bit strings are always stored in a full number of bytes */ + return memcmp((void *) VARBITS(arg1), (void *) VARBITS(arg2), + VARBITBYTES(arg1)) != 0; } /* bitcmp - * + * * Compares two bitstrings and returns -1, 0, 1 depending on whether the first * string is smaller, equal, or bigger than the second. All bits are considered * and additional zero bits may make one string smaller/larger than the other, * even if their zero-padded values would be the same. - * Anything is equal to undefined. + * Anything is equal to undefined. */ -int -bitcmp (bits8 *arg1, bits8 *arg2) +int +bitcmp(bits8 *arg1, bits8 *arg2) { - int bitlen1, bytelen1, - bitlen2, bytelen2; - int cmp; - - if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) - return (bool) 0; - bytelen1 = VARBITBYTES(arg1); - bytelen2 = VARBITBYTES(arg2); - - cmp = memcmp(VARBITS(arg1),VARBITS(arg2),Min(bytelen1,bytelen2)); - if (cmp==0) { - bitlen1 = VARBITLEN(arg1); - bitlen2 = VARBITLEN(arg2); - if (bitlen1 != bitlen2) - return bitlen1 < bitlen2 ? -1 : 1; - } - return cmp; + int bitlen1, + bytelen1, + bitlen2, + bytelen2; + int cmp; + + if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) + return (bool) 0; + bytelen1 = VARBITBYTES(arg1); + bytelen2 = VARBITBYTES(arg2); + + cmp = memcmp(VARBITS(arg1), VARBITS(arg2), Min(bytelen1, bytelen2)); + if (cmp == 0) + { + bitlen1 = VARBITLEN(arg1); + bitlen2 = VARBITLEN(arg2); + if (bitlen1 != bitlen2) + return bitlen1 < bitlen2 ? -1 : 1; + } + return cmp; } bool -bitlt (bits8 *arg1, bits8 *arg2) +bitlt(bits8 *arg1, bits8 *arg2) { - return (bool) (bitcmp(arg1,arg2) == -1); + return (bool) (bitcmp(arg1, arg2) == -1); } bool -bitle (bits8 *arg1, bits8 *arg2) +bitle(bits8 *arg1, bits8 *arg2) { - return (bool) (bitcmp(arg1,arg2) <= 0); + return (bool) (bitcmp(arg1, arg2) <= 0); } bool -bitge (bits8 *arg1, bits8 *arg2) +bitge(bits8 *arg1, bits8 *arg2) { - return (bool) (bitcmp(arg1,arg2) >= 0); + return (bool) (bitcmp(arg1, arg2) >= 0); } bool -bitgt (bits8 *arg1, bits8 *arg2) +bitgt(bits8 *arg1, bits8 *arg2) { - return (bool) (bitcmp(arg1,arg2) == 1); + return (bool) (bitcmp(arg1, arg2) == 1); } /* bitcat * Concatenation of bit strings */ bits8 * -bitcat (bits8 *arg1, bits8 *arg2) +bitcat(bits8 *arg1, bits8 *arg2) { - int bitlen1, bitlen2, bytelen, bit1pad, bit2shift; - bits8 *result; - bits8 *pr, *pa; - - if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) - return NULL; - - bitlen1 = VARBITLEN(arg1); - bitlen2 = VARBITLEN(arg2); - - bytelen = VARBITDATALEN(bitlen1+bitlen2); - - result = (bits8 *) palloc(bytelen*sizeof(bits8)); - VARSIZE(result) = bytelen; - VARBITLEN(result) = bitlen1+bitlen2; - printf("%d %d %d \n",VARBITBYTES(arg1),VARBITLEN(arg1),VARBITPAD(arg1)); - /* Copy the first bitstring in */ - memcpy(VARBITS(result),VARBITS(arg1),VARBITBYTES(arg1)); - /* Copy the second bit string */ - bit1pad = VARBITPAD(arg1); - if (bit1pad==0) - { - memcpy(VARBITS(result)+VARBITBYTES(arg1),VARBITS(arg2), - VARBITBYTES(arg2)); - } - else if (bitlen2>0) - { - /* We need to shift all the results to fit */ - bit2shift = BITSPERBYTE - bit1pad; - pa = VARBITS(arg2); - pr = VARBITS(result)+VARBITBYTES(arg1)-1; - for ( ; pa < VARBITEND(arg2); pa++) { - *pr |= ((*pa >> bit2shift) & BITMASK); - pr++; - if (pr < VARBITEND(result)) - *pr = (*pa << bit1pad) & BITMASK; - } - } - - return result; + int bitlen1, + bitlen2, + bytelen, + bit1pad, + bit2shift; + bits8 *result; + bits8 *pr, + *pa; + + if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) + return NULL; + + bitlen1 = VARBITLEN(arg1); + bitlen2 = VARBITLEN(arg2); + + bytelen = VARBITDATALEN(bitlen1 + bitlen2); + + result = (bits8 *) palloc(bytelen * sizeof(bits8)); + VARSIZE(result) = bytelen; + VARBITLEN(result) = bitlen1 + bitlen2; + printf("%d %d %d \n", VARBITBYTES(arg1), VARBITLEN(arg1), VARBITPAD(arg1)); + /* Copy the first bitstring in */ + memcpy(VARBITS(result), VARBITS(arg1), VARBITBYTES(arg1)); + /* Copy the second bit string */ + bit1pad = VARBITPAD(arg1); + if (bit1pad == 0) + { + memcpy(VARBITS(result) + VARBITBYTES(arg1), VARBITS(arg2), + VARBITBYTES(arg2)); + } + else if (bitlen2 > 0) + { + /* We need to shift all the results to fit */ + bit2shift = BITSPERBYTE - bit1pad; + pa = VARBITS(arg2); + pr = VARBITS(result) + VARBITBYTES(arg1) - 1; + for (; pa < VARBITEND(arg2); pa++) + { + *pr |= ((*pa >> bit2shift) & BITMASK); + pr++; + if (pr < VARBITEND(result)) + *pr = (*pa << bit1pad) & BITMASK; + } + } + + return result; } /* bitsubstr - * retrieve a substring from the bit string. + * retrieve a substring from the bit string. * Note, s is 1-based. * SQL draft 6.10 9) */ -bits8 * -bitsubstr (bits8 *arg, int32 s, int32 l) +bits8 * +bitsubstr(bits8 *arg, int32 s, int32 l) { - int bitlen, - rbitlen, - len, - ipad = 0, - ishift, - i; - int e, s1, e1; - bits8 * result; - bits8 mask, *r, *ps; - - if (!PointerIsValid(arg)) - return NULL; - - bitlen = VARBITLEN(arg); - e = s+l; - s1 = Max(s,1); - e1 = Min(e,bitlen+1); - if (s1>bitlen || e1<1) - { - /* Need to return a null string */ - len = VARBITDATALEN(0); - result = (bits8 *) palloc(len); - VARBITLEN(result) = 0; - VARSIZE(result) = len; - } - else - { - /* OK, we've got a true substring starting at position s1-1 and - ending at position e1-1 */ - rbitlen = e1-s1; - len = VARBITDATALEN(rbitlen); - result = (bits8 *) palloc(len); - VARBITLEN(result) = rbitlen; - VARSIZE(result) = len; - len -= VARHDRSZ + VARBITHDRSZ; - /* Are we copying from a byte boundary? */ - if ((s1-1)%BITSPERBYTE==0) + int bitlen, + rbitlen, + len, + ipad = 0, + ishift, + i; + int e, + s1, + e1; + bits8 *result; + bits8 mask, + *r, + *ps; + + if (!PointerIsValid(arg)) + return NULL; + + bitlen = VARBITLEN(arg); + e = s + l; + s1 = Max(s, 1); + e1 = Min(e, bitlen + 1); + if (s1 > bitlen || e1 < 1) { - /* Yep, we are copying bytes */ - memcpy(VARBITS(result),VARBITS(arg)+(s1-1)/BITSPERBYTE,len); - } - else - { - /* Figure out how much we need to shift the sequence by */ - ishift = (s1-1)%BITSPERBYTE; - r = VARBITS(result); - ps = VARBITS(arg) + (s1-1)/BITSPERBYTE; - for (i=0; i<len; i++) - { - *r = (*ps <<ishift) & BITMASK; - if ((++ps) < VARBITEND(arg)) - *r |= *ps >>(BITSPERBYTE-ishift); - r++; - } + /* Need to return a null string */ + len = VARBITDATALEN(0); + result = (bits8 *) palloc(len); + VARBITLEN(result) = 0; + VARSIZE(result) = len; } - /* Do we need to pad at the end? */ - ipad = VARBITPAD(result); - if (ipad > 0) + else { - mask = BITMASK << ipad; - *(VARBITS(result) + len - 1) &= mask; + + /* + * OK, we've got a true substring starting at position s1-1 and + * ending at position e1-1 + */ + rbitlen = e1 - s1; + len = VARBITDATALEN(rbitlen); + result = (bits8 *) palloc(len); + VARBITLEN(result) = rbitlen; + VARSIZE(result) = len; + len -= VARHDRSZ + VARBITHDRSZ; + /* Are we copying from a byte boundary? */ + if ((s1 - 1) % BITSPERBYTE == 0) + { + /* Yep, we are copying bytes */ + memcpy(VARBITS(result), VARBITS(arg) + (s1 - 1) / BITSPERBYTE, len); + } + else + { + /* Figure out how much we need to shift the sequence by */ + ishift = (s1 - 1) % BITSPERBYTE; + r = VARBITS(result); + ps = VARBITS(arg) + (s1 - 1) / BITSPERBYTE; + for (i = 0; i < len; i++) + { + *r = (*ps << ishift) & BITMASK; + if ((++ps) < VARBITEND(arg)) + *r |= *ps >> (BITSPERBYTE - ishift); + r++; + } + } + /* Do we need to pad at the end? */ + ipad = VARBITPAD(result); + if (ipad > 0) + { + mask = BITMASK << ipad; + *(VARBITS(result) + len - 1) &= mask; + } } - } - return result; + return result; } /* bitand @@ -598,32 +656,32 @@ bitsubstr (bits8 *arg, int32 s, int32 l) * truncated to the shorter bit string */ bits8 * -bitand (bits8 * arg1, bits8 * arg2) +bitand(bits8 *arg1, bits8 *arg2) { - int len, - i; - bits8 *result; - bits8 *p1, - *p2, - *r; - - if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) - return (bool) 0; - - len = Min(VARSIZE(arg1),VARSIZE(arg2)); - result = (bits8 *) palloc(len); - VARSIZE(result) = len; - VARBITLEN(result) = Min(VARBITLEN(arg1),VARBITLEN(arg2)); - - p1 = (bits8 *) VARBITS(arg1); - p2 = (bits8 *) VARBITS(arg2); - r = (bits8 *) VARBITS(result); - for (i=0; i<Min(VARBITBYTES(arg1),VARBITBYTES(arg2)); i++) - *r++ = *p1++ & *p2++; - - /* Padding is not needed as & of 0 pad is 0 */ - - return result; + int len, + i; + bits8 *result; + bits8 *p1, + *p2, + *r; + + if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) + return (bool) 0; + + len = Min(VARSIZE(arg1), VARSIZE(arg2)); + result = (bits8 *) palloc(len); + VARSIZE(result) = len; + VARBITLEN(result) = Min(VARBITLEN(arg1), VARBITLEN(arg2)); + + p1 = (bits8 *) VARBITS(arg1); + p2 = (bits8 *) VARBITS(arg2); + r = (bits8 *) VARBITS(result); + for (i = 0; i < Min(VARBITBYTES(arg1), VARBITBYTES(arg2)); i++) + *r++ = *p1++ & *p2++; + + /* Padding is not needed as & of 0 pad is 0 */ + + return result; } /* bitor @@ -631,35 +689,35 @@ bitand (bits8 * arg1, bits8 * arg2) * truncated to the shorter bit string. */ bits8 * -bitor (bits8 * arg1, bits8 * arg2) +bitor(bits8 *arg1, bits8 *arg2) { - int len, - i; - bits8 *result; - bits8 *p1, - *p2, - *r; - bits8 mask; - - if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) - return (bool) 0; - - len = Min(VARSIZE(arg1),VARSIZE(arg2)); - result = (bits8 *) palloc(len); - VARSIZE(result) = len; - VARBITLEN(result) = Min(VARBITLEN(arg1),VARBITLEN(arg2)); - - p1 = (bits8 *) VARBITS(arg1); - p2 = (bits8 *) VARBITS(arg2); - r = (bits8 *) VARBITS(result); - for (i=0; i<Min(VARBITBYTES(arg1),VARBITBYTES(arg2)); i++) - *r++ = *p1++ | *p2++; - - /* Pad the result */ - mask = BITMASK << VARBITPAD(result); - *r &= mask; - - return result; + int len, + i; + bits8 *result; + bits8 *p1, + *p2, + *r; + bits8 mask; + + if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) + return (bool) 0; + + len = Min(VARSIZE(arg1), VARSIZE(arg2)); + result = (bits8 *) palloc(len); + VARSIZE(result) = len; + VARBITLEN(result) = Min(VARBITLEN(arg1), VARBITLEN(arg2)); + + p1 = (bits8 *) VARBITS(arg1); + p2 = (bits8 *) VARBITS(arg2); + r = (bits8 *) VARBITS(result); + for (i = 0; i < Min(VARBITBYTES(arg1), VARBITBYTES(arg2)); i++) + *r++ = *p1++ | *p2++; + + /* Pad the result */ + mask = BITMASK << VARBITPAD(result); + *r &= mask; + + return result; } /* bitxor @@ -667,160 +725,167 @@ bitor (bits8 * arg1, bits8 * arg2) * truncated to the shorter bit string. */ bits8 * -bitxor (bits8 * arg1, bits8 * arg2) +bitxor(bits8 *arg1, bits8 *arg2) { - int len, - i; - bits8 *result; - bits8 *p1, - *p2, - *r; - bits8 mask; - - if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) - return (bool) 0; - - len = Min(VARSIZE(arg1),VARSIZE(arg2)); - result = (bits8 *) palloc(len); - VARSIZE(result) = len; - VARBITLEN(result) = Min(VARBITLEN(arg1),VARBITLEN(arg2)); - - p1 = (bits8 *) VARBITS(arg1); - p2 = (bits8 *) VARBITS(arg2); - r = (bits8 *) VARBITS(result); - for (i=0; i<Min(VARBITBYTES(arg1),VARBITBYTES(arg2)); i++) - { - *r++ = *p1++ ^ *p2++; - } - - /* Pad the result */ - mask = BITMASK << VARBITPAD(result); - *r &= mask; - - return result; + int len, + i; + bits8 *result; + bits8 *p1, + *p2, + *r; + bits8 mask; + + if (!PointerIsValid(arg1) || !PointerIsValid(arg2)) + return (bool) 0; + + len = Min(VARSIZE(arg1), VARSIZE(arg2)); + result = (bits8 *) palloc(len); + VARSIZE(result) = len; + VARBITLEN(result) = Min(VARBITLEN(arg1), VARBITLEN(arg2)); + + p1 = (bits8 *) VARBITS(arg1); + p2 = (bits8 *) VARBITS(arg2); + r = (bits8 *) VARBITS(result); + for (i = 0; i < Min(VARBITBYTES(arg1), VARBITBYTES(arg2)); i++) + *r++ = *p1++ ^ *p2++; + + /* Pad the result */ + mask = BITMASK << VARBITPAD(result); + *r &= mask; + + return result; } /* bitnot * perform a logical NOT on a bit strings. */ bits8 * -bitnot (bits8 * arg) +bitnot(bits8 *arg) { - bits8 *result; - bits8 *p, - *r; - bits8 mask; - - if (!PointerIsValid(arg)) - return (bool) 0; - - result = (bits8 *) palloc(VARSIZE(arg)); - VARSIZE(result) = VARSIZE(arg); - VARBITLEN(result) = VARBITLEN(arg); - - p = (bits8 *) VARBITS(arg); - r = (bits8 *) VARBITS(result); - for ( ; p < VARBITEND(arg); p++, r++) - *r = ~*p; - - /* Pad the result */ - mask = BITMASK << VARBITPAD(result); - *r &= mask; - - return result; + bits8 *result; + bits8 *p, + *r; + bits8 mask; + + if (!PointerIsValid(arg)) + return (bool) 0; + + result = (bits8 *) palloc(VARSIZE(arg)); + VARSIZE(result) = VARSIZE(arg); + VARBITLEN(result) = VARBITLEN(arg); + + p = (bits8 *) VARBITS(arg); + r = (bits8 *) VARBITS(result); + for (; p < VARBITEND(arg); p++, r++) + *r = ~*p; + + /* Pad the result */ + mask = BITMASK << VARBITPAD(result); + *r &= mask; + + return result; } /* bitshiftleft * do a left shift (i.e. to the beginning of the string) of the bit string */ bits8 * -bitshiftleft (bits8 * arg, int shft) +bitshiftleft(bits8 *arg, int shft) { - int byte_shift, ishift, len; - bits8 *result; - bits8 *p, - *r; - - if (!PointerIsValid(arg)) - return (bool) 0; - - /* Negative shift is a shift to the right */ - if (shft < 0) - return bitshiftright(arg, -shft); - - result = (bits8 *) palloc(VARSIZE(arg)); - VARSIZE(result) = VARSIZE(arg); - VARBITLEN(result) = VARBITLEN(arg); - r = (bits8 *) VARBITS(result); - - byte_shift = shft/BITSPERBYTE; - ishift = shft % BITSPERBYTE; - p = ((bits8 *) VARBITS(arg)) + byte_shift; - - if (ishift == 0) { - /* Special case: we can do a memcpy */ - len = VARBITBYTES(arg) - byte_shift; - memcpy(r, p, len); - memset(r+len, 0, byte_shift); - } else { - for ( ; p < VARBITEND(arg); r++) { - *r = *p <<ishift; - if ((++p) < VARBITEND(arg)) - *r |= *p >>(BITSPERBYTE-ishift); - } - for ( ; r < VARBITEND(result) ; r++ ) - *r = (bits8) 0; - } - - return result; + int byte_shift, + ishift, + len; + bits8 *result; + bits8 *p, + *r; + + if (!PointerIsValid(arg)) + return (bool) 0; + + /* Negative shift is a shift to the right */ + if (shft < 0) + return bitshiftright(arg, -shft); + + result = (bits8 *) palloc(VARSIZE(arg)); + VARSIZE(result) = VARSIZE(arg); + VARBITLEN(result) = VARBITLEN(arg); + r = (bits8 *) VARBITS(result); + + byte_shift = shft / BITSPERBYTE; + ishift = shft % BITSPERBYTE; + p = ((bits8 *) VARBITS(arg)) + byte_shift; + + if (ishift == 0) + { + /* Special case: we can do a memcpy */ + len = VARBITBYTES(arg) - byte_shift; + memcpy(r, p, len); + memset(r + len, 0, byte_shift); + } + else + { + for (; p < VARBITEND(arg); r++) + { + *r = *p << ishift; + if ((++p) < VARBITEND(arg)) + *r |= *p >> (BITSPERBYTE - ishift); + } + for (; r < VARBITEND(result); r++) + *r = (bits8) 0; + } + + return result; } /* bitshiftright * do a right shift (i.e. to the beginning of the string) of the bit string */ bits8 * -bitshiftright (bits8 * arg, int shft) +bitshiftright(bits8 *arg, int shft) { - int byte_shift, ishift, len; - bits8 *result; - bits8 *p, - *r; - - if (!PointerIsValid(arg)) - return (bits8 *) 0; - - /* Negative shift is a shift to the left */ - if (shft < 0) - return bitshiftleft(arg, -shft); - - result = (bits8 *) palloc(VARSIZE(arg)); - VARSIZE(result) = VARSIZE(arg); - VARBITLEN(result) = VARBITLEN(arg); - r = (bits8 *) VARBITS(result); - - byte_shift = shft/BITSPERBYTE; - ishift = shft % BITSPERBYTE; - p = (bits8 *) VARBITS(arg); - - /* Set the first part of the result to 0 */ - memset(r, 0, byte_shift); - - if (ishift == 0) - { - /* Special case: we can do a memcpy */ - len = VARBITBYTES(arg) - byte_shift; - memcpy(r+byte_shift, p, len); - } - else - { - r += byte_shift; - *r = 0; /* Initialise first byte */ - for ( ; r < VARBITEND(result); p++) { - *r |= *p >> ishift; - if ((++r) < VARBITEND(result)) - *r = (*p <<(BITSPERBYTE-ishift)) & BITMASK; - } - } - - return result; + int byte_shift, + ishift, + len; + bits8 *result; + bits8 *p, + *r; + + if (!PointerIsValid(arg)) + return (bits8 *) 0; + + /* Negative shift is a shift to the left */ + if (shft < 0) + return bitshiftleft(arg, -shft); + + result = (bits8 *) palloc(VARSIZE(arg)); + VARSIZE(result) = VARSIZE(arg); + VARBITLEN(result) = VARBITLEN(arg); + r = (bits8 *) VARBITS(result); + + byte_shift = shft / BITSPERBYTE; + ishift = shft % BITSPERBYTE; + p = (bits8 *) VARBITS(arg); + + /* Set the first part of the result to 0 */ + memset(r, 0, byte_shift); + + if (ishift == 0) + { + /* Special case: we can do a memcpy */ + len = VARBITBYTES(arg) - byte_shift; + memcpy(r + byte_shift, p, len); + } + else + { + r += byte_shift; + *r = 0; /* Initialise first byte */ + for (; r < VARBITEND(result); p++) + { + *r |= *p >> ishift; + if ((++r) < VARBITEND(result)) + *r = (*p << (BITSPERBYTE - ishift)) & BITMASK; + } + } + + return result; } |