diff options
Diffstat (limited to 'src/backend/utils/adt/varlena.c')
| -rw-r--r-- | src/backend/utils/adt/varlena.c | 132 |
1 files changed, 58 insertions, 74 deletions
diff --git a/src/backend/utils/adt/varlena.c b/src/backend/utils/adt/varlena.c index efa6ab6552..c534c7d92e 100644 --- a/src/backend/utils/adt/varlena.c +++ b/src/backend/utils/adt/varlena.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/utils/adt/varlena.c,v 1.69 2001/03/22 03:59:55 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/utils/adt/varlena.c,v 1.70 2001/05/03 19:00:36 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -440,72 +440,6 @@ textpos(PG_FUNCTION_ARGS) PG_RETURN_INT32(pos); } -/* - * texteq - returns true iff arguments are equal - * textne - returns true iff arguments are not equal - * - * Note: btree indexes need these routines not to leak memory; therefore, - * be careful to free working copies of toasted datums. Most places don't - * need to be so careful. - */ -Datum -texteq(PG_FUNCTION_ARGS) -{ - text *arg1 = PG_GETARG_TEXT_P(0); - text *arg2 = PG_GETARG_TEXT_P(1); - bool result; - - if (VARSIZE(arg1) != VARSIZE(arg2)) - result = false; - else - { - int len; - char *a1p, - *a2p; - - len = VARSIZE(arg1) - VARHDRSZ; - - a1p = VARDATA(arg1); - a2p = VARDATA(arg2); - - result = (memcmp(a1p, a2p, len) == 0); - } - - PG_FREE_IF_COPY(arg1, 0); - PG_FREE_IF_COPY(arg2, 1); - - PG_RETURN_BOOL(result); -} - -Datum -textne(PG_FUNCTION_ARGS) -{ - text *arg1 = PG_GETARG_TEXT_P(0); - text *arg2 = PG_GETARG_TEXT_P(1); - bool result; - - if (VARSIZE(arg1) != VARSIZE(arg2)) - result = true; - else - { - int len; - char *a1p, - *a2p; - - len = VARSIZE(arg1) - VARHDRSZ; - - a1p = VARDATA(arg1); - a2p = VARDATA(arg2); - - result = (memcmp(a1p, a2p, len) != 0); - } - - PG_FREE_IF_COPY(arg1, 0); - PG_FREE_IF_COPY(arg2, 1); - - PG_RETURN_BOOL(result); -} - /* varstr_cmp() * Comparison function for text strings with given lengths. * Includes locale support, but must copy strings to temporary memory @@ -520,8 +454,8 @@ varstr_cmp(char *arg1, int len1, char *arg2, int len2) *a2p; #ifdef USE_LOCALE - a1p = (unsigned char *) palloc(len1 + 1); - a2p = (unsigned char *) palloc(len2 + 1); + a1p = (char *) palloc(len1 + 1); + a2p = (char *) palloc(len2 + 1); memcpy(a1p, arg1, len1); *(a1p + len1) = '\0'; @@ -548,11 +482,7 @@ varstr_cmp(char *arg1, int len1, char *arg2, int len2) /* text_cmp() - * Comparison function for text strings. - * Includes locale support, but must copy strings to temporary memory - * to allow null-termination for inputs to strcoll(). - * XXX HACK code for textlen() indicates that there can be embedded nulls - * but it appears that most routines (incl. this one) assume not! - tgl 97/04/07 + * Internal comparison function for text strings. * Returns -1, 0 or 1 */ static int @@ -581,6 +511,44 @@ text_cmp(text *arg1, text *arg2) */ Datum +texteq(PG_FUNCTION_ARGS) +{ + text *arg1 = PG_GETARG_TEXT_P(0); + text *arg2 = PG_GETARG_TEXT_P(1); + bool result; + + /* fast path for different-length inputs */ + if (VARSIZE(arg1) != VARSIZE(arg2)) + result = false; + else + result = (text_cmp(arg1, arg2) == 0); + + PG_FREE_IF_COPY(arg1, 0); + PG_FREE_IF_COPY(arg2, 1); + + PG_RETURN_BOOL(result); +} + +Datum +textne(PG_FUNCTION_ARGS) +{ + text *arg1 = PG_GETARG_TEXT_P(0); + text *arg2 = PG_GETARG_TEXT_P(1); + bool result; + + /* fast path for different-length inputs */ + if (VARSIZE(arg1) != VARSIZE(arg2)) + result = true; + else + result = (text_cmp(arg1, arg2) != 0); + + PG_FREE_IF_COPY(arg1, 0); + PG_FREE_IF_COPY(arg2, 1); + + PG_RETURN_BOOL(result); +} + +Datum text_lt(PG_FUNCTION_ARGS) { text *arg1 = PG_GETARG_TEXT_P(0); @@ -641,6 +609,22 @@ text_ge(PG_FUNCTION_ARGS) } Datum +bttextcmp(PG_FUNCTION_ARGS) +{ + text *arg1 = PG_GETARG_TEXT_P(0); + text *arg2 = PG_GETARG_TEXT_P(1); + int32 result; + + result = text_cmp(arg1, arg2); + + PG_FREE_IF_COPY(arg1, 0); + PG_FREE_IF_COPY(arg2, 1); + + PG_RETURN_INT32(result); +} + + +Datum text_larger(PG_FUNCTION_ARGS) { text *arg1 = PG_GETARG_TEXT_P(0); |