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0bd61548ab
conversion of basic ASCII letters. Remove all uses of strcasecmp and strncasecmp in favor of new functions pg_strcasecmp and pg_strncasecmp; remove most but not all direct uses of toupper and tolower in favor of pg_toupper and pg_tolower. These functions use the same notions of case folding already developed for identifier case conversion. I left the straight locale-based folding in place for situations where we are just manipulating user data and not trying to match it to built-in strings --- for example, the SQL upper() function is still locale dependent. Perhaps this will prove not to be what's wanted, but at the moment we can initdb and pass regression tests in Turkish locale.
111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
/*
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* txtquery operations with ltree
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* Teodor Sigaev <teodor@stack.net>
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*/
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#include "ltree.h"
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#include <ctype.h>
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PG_FUNCTION_INFO_V1(ltxtq_exec);
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PG_FUNCTION_INFO_V1(ltxtq_rexec);
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/*
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* check for boolean condition
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*/
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bool
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ltree_execute(ITEM * curitem, void *checkval, bool calcnot, bool (*chkcond) (void *checkval, ITEM * val))
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{
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if (curitem->type == VAL)
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return (*chkcond) (checkval, curitem);
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else if (curitem->val == (int4) '!')
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{
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return (calcnot) ?
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((ltree_execute(curitem + 1, checkval, calcnot, chkcond)) ? false : true)
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: true;
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}
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else if (curitem->val == (int4) '&')
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{
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if (ltree_execute(curitem + curitem->left, checkval, calcnot, chkcond))
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return ltree_execute(curitem + 1, checkval, calcnot, chkcond);
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else
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return false;
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}
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else
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{ /* |-operator */
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if (ltree_execute(curitem + curitem->left, checkval, calcnot, chkcond))
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return true;
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else
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return ltree_execute(curitem + 1, checkval, calcnot, chkcond);
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}
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return false;
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}
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typedef struct
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{
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ltree *node;
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char *operand;
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} CHKVAL;
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static bool
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checkcondition_str(void *checkval, ITEM * val)
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{
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ltree_level *level = LTREE_FIRST(((CHKVAL *) checkval)->node);
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int tlen = ((CHKVAL *) checkval)->node->numlevel;
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char *op = ((CHKVAL *) checkval)->operand + val->distance;
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int (*cmpptr) (const char *, const char *, size_t);
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cmpptr = (val->flag & LVAR_INCASE) ? pg_strncasecmp : strncmp;
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while (tlen > 0)
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{
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if (val->flag & LVAR_SUBLEXEM)
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{
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if (compare_subnode(level, op, val->length, cmpptr, (val->flag & LVAR_ANYEND)))
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return true;
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}
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else if (
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(
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val->length == level->len ||
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(level->len > val->length && (val->flag & LVAR_ANYEND))
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) &&
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(*cmpptr) (op, level->name, val->length) == 0)
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return true;
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tlen--;
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level = LEVEL_NEXT(level);
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}
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return false;
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}
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Datum
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ltxtq_exec(PG_FUNCTION_ARGS)
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{
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ltree *val = PG_GETARG_LTREE(0);
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ltxtquery *query = PG_GETARG_LTXTQUERY(1);
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CHKVAL chkval;
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bool result;
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chkval.node = val;
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chkval.operand = GETOPERAND(query);
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result = ltree_execute(
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GETQUERY(query),
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&chkval,
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true,
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checkcondition_str
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);
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PG_FREE_IF_COPY(val, 0);
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PG_FREE_IF_COPY(query, 1);
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PG_RETURN_BOOL(result);
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}
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Datum
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ltxtq_rexec(PG_FUNCTION_ARGS)
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{
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PG_RETURN_DATUM(DirectFunctionCall2(ltxtq_exec,
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PG_GETARG_DATUM(1),
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PG_GETARG_DATUM(0)
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));
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}
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