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c9d2977519
We used to strategically place newlines after some function call left parentheses to make pgindent move the argument list a few chars to the left, so that the whole line would fit under 80 chars. However, pgindent no longer does that, so the newlines just made the code vertically longer for no reason. Remove those newlines, and reflow some of those lines for some extra naturality. Reviewed-by: Michael Paquier, Tom Lane Discussion: https://postgr.es/m/20200129200401.GA6303@alvherre.pgsql
112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
/*
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* txtquery operations with ltree
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* Teodor Sigaev <teodor@stack.net>
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* contrib/ltree/ltxtquery_op.c
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*/
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#include "postgres.h"
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#include <ctype.h>
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#include "ltree.h"
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#include "miscadmin.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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/* since this function recurses, it could be driven to stack overflow */
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check_stack_depth();
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if (curitem->type == VAL)
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return (*chkcond) (checkval, curitem);
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else if (curitem->val == (int32) '!')
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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 == (int32) '&')
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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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}
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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) ? ltree_strncasecmp : strncmp;
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while (tlen > 0)
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{
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if (val->flag & LVAR_SUBLEXEME)
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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 ((val->length == level->len ||
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(level->len > val->length && (val->flag & LVAR_ANYEND))) &&
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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_P(0);
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ltxtquery *query = PG_GETARG_LTXTQUERY_P(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(GETQUERY(query),
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&chkval,
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true,
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checkcondition_str);
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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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