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09d8d110a6
Replace some bogus "x[1]" declarations with "x[FLEXIBLE_ARRAY_MEMBER]". Aside from being more self-documenting, this should help prevent bogus warnings from static code analyzers and perhaps compiler misoptimizations. This patch is just a down payment on eliminating the whole problem, but it gets rid of a lot of easy-to-fix cases. Note that the main problem with doing this is that one must no longer rely on computing sizeof(the containing struct), since the result would be compiler-dependent. Instead use offsetof(struct, lastfield). Autoconf also warns against spelling that offsetof(struct, lastfield[0]). Michael Paquier, review and additional fixes by me.
248 lines
7.4 KiB
C
248 lines
7.4 KiB
C
/* contrib/ltree/ltree.h */
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#ifndef __LTREE_H__
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#define __LTREE_H__
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#include "fmgr.h"
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#include "tsearch/ts_locale.h"
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#include "utils/memutils.h"
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typedef struct
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{
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uint16 len;
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char name[FLEXIBLE_ARRAY_MEMBER];
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} ltree_level;
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#define LEVEL_HDRSIZE (offsetof(ltree_level,name))
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#define LEVEL_NEXT(x) ( (ltree_level*)( ((char*)(x)) + MAXALIGN(((ltree_level*)(x))->len + LEVEL_HDRSIZE) ) )
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typedef struct
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{
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int32 vl_len_; /* varlena header (do not touch directly!) */
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uint16 numlevel;
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char data[FLEXIBLE_ARRAY_MEMBER];
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} ltree;
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#define LTREE_HDRSIZE MAXALIGN( offsetof(ltree, data) )
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#define LTREE_FIRST(x) ( (ltree_level*)( ((char*)(x))+LTREE_HDRSIZE ) )
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/* lquery */
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typedef struct
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{
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int32 val;
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uint16 len;
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uint8 flag;
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char name[FLEXIBLE_ARRAY_MEMBER];
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} lquery_variant;
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#define LVAR_HDRSIZE MAXALIGN(offsetof(lquery_variant, name))
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#define LVAR_NEXT(x) ( (lquery_variant*)( ((char*)(x)) + MAXALIGN(((lquery_variant*)(x))->len) + LVAR_HDRSIZE ) )
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#define LVAR_ANYEND 0x01
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#define LVAR_INCASE 0x02
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#define LVAR_SUBLEXEME 0x04
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typedef struct
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{
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uint16 totallen;
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uint16 flag;
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uint16 numvar;
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uint16 low;
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uint16 high;
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char variants[FLEXIBLE_ARRAY_MEMBER];
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} lquery_level;
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#define LQL_HDRSIZE MAXALIGN( offsetof(lquery_level,variants) )
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#define LQL_NEXT(x) ( (lquery_level*)( ((char*)(x)) + MAXALIGN(((lquery_level*)(x))->totallen) ) )
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#define LQL_FIRST(x) ( (lquery_variant*)( ((char*)(x))+LQL_HDRSIZE ) )
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#define LQL_NOT 0x10
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#ifdef LOWER_NODE
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#define FLG_CANLOOKSIGN(x) ( ( (x) & ( LQL_NOT | LVAR_ANYEND | LVAR_SUBLEXEME ) ) == 0 )
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#else
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#define FLG_CANLOOKSIGN(x) ( ( (x) & ( LQL_NOT | LVAR_ANYEND | LVAR_SUBLEXEME | LVAR_INCASE ) ) == 0 )
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#endif
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#define LQL_CANLOOKSIGN(x) FLG_CANLOOKSIGN( ((lquery_level*)(x))->flag )
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typedef struct
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{
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int32 vl_len_; /* varlena header (do not touch directly!) */
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uint16 numlevel;
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uint16 firstgood;
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uint16 flag;
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char data[FLEXIBLE_ARRAY_MEMBER];
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} lquery;
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#define LQUERY_HDRSIZE MAXALIGN( offsetof(lquery, data) )
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#define LQUERY_FIRST(x) ( (lquery_level*)( ((char*)(x))+LQUERY_HDRSIZE ) )
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#define LQUERY_HASNOT 0x01
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#define ISALNUM(x) ( t_isalpha(x) || t_isdigit(x) || ( pg_mblen(x) == 1 && t_iseq((x), '_') ) )
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/* full text query */
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/*
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* item in polish notation with back link
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* to left operand
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*/
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typedef struct ITEM
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{
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int16 type;
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int16 left;
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int32 val;
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uint8 flag;
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/* user-friendly value */
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uint8 length;
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uint16 distance;
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} ITEM;
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/*
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*Storage:
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* (len)(size)(array of ITEM)(array of operand in user-friendly form)
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*/
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typedef struct
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{
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int32 vl_len_; /* varlena header (do not touch directly!) */
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int32 size;
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char data[FLEXIBLE_ARRAY_MEMBER];
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} ltxtquery;
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#define HDRSIZEQT MAXALIGN(VARHDRSZ + sizeof(int32))
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#define COMPUTESIZE(size,lenofoperand) ( HDRSIZEQT + (size) * sizeof(ITEM) + (lenofoperand) )
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#define LTXTQUERY_TOO_BIG(size,lenofoperand) \
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((size) > (MaxAllocSize - HDRSIZEQT - (lenofoperand)) / sizeof(ITEM))
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#define GETQUERY(x) (ITEM*)( (char*)(x)+HDRSIZEQT )
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#define GETOPERAND(x) ( (char*)GETQUERY(x) + ((ltxtquery*)x)->size * sizeof(ITEM) )
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#define ISOPERATOR(x) ( (x)=='!' || (x)=='&' || (x)=='|' || (x)=='(' || (x)==')' )
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#define END 0
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#define ERR 1
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#define VAL 2
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#define OPR 3
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#define OPEN 4
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#define CLOSE 5
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#define VALTRUE 6 /* for stop words */
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#define VALFALSE 7
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/* use in array iterator */
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Datum ltree_isparent(PG_FUNCTION_ARGS);
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Datum ltree_risparent(PG_FUNCTION_ARGS);
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Datum ltq_regex(PG_FUNCTION_ARGS);
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Datum ltq_rregex(PG_FUNCTION_ARGS);
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Datum lt_q_regex(PG_FUNCTION_ARGS);
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Datum lt_q_rregex(PG_FUNCTION_ARGS);
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Datum ltxtq_exec(PG_FUNCTION_ARGS);
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Datum ltxtq_rexec(PG_FUNCTION_ARGS);
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Datum _ltq_regex(PG_FUNCTION_ARGS);
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Datum _ltq_rregex(PG_FUNCTION_ARGS);
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Datum _lt_q_regex(PG_FUNCTION_ARGS);
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Datum _lt_q_rregex(PG_FUNCTION_ARGS);
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Datum _ltxtq_exec(PG_FUNCTION_ARGS);
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Datum _ltxtq_rexec(PG_FUNCTION_ARGS);
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Datum _ltree_isparent(PG_FUNCTION_ARGS);
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Datum _ltree_risparent(PG_FUNCTION_ARGS);
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/* Concatenation functions */
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Datum ltree_addltree(PG_FUNCTION_ARGS);
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Datum ltree_addtext(PG_FUNCTION_ARGS);
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Datum ltree_textadd(PG_FUNCTION_ARGS);
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/* Util function */
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Datum ltree_in(PG_FUNCTION_ARGS);
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bool ltree_execute(ITEM *curitem, void *checkval,
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bool calcnot, bool (*chkcond) (void *checkval, ITEM *val));
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int ltree_compare(const ltree *a, const ltree *b);
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bool inner_isparent(const ltree *c, const ltree *p);
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bool compare_subnode(ltree_level *t, char *q, int len,
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int (*cmpptr) (const char *, const char *, size_t), bool anyend);
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ltree *lca_inner(ltree **a, int len);
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int ltree_strncasecmp(const char *a, const char *b, size_t s);
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#define PG_GETARG_LTREE(x) ((ltree*)DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(x))))
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#define PG_GETARG_LTREE_COPY(x) ((ltree*)DatumGetPointer(PG_DETOAST_DATUM_COPY(PG_GETARG_DATUM(x))))
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#define PG_GETARG_LQUERY(x) ((lquery*)DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(x))))
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#define PG_GETARG_LQUERY_COPY(x) ((lquery*)DatumGetPointer(PG_DETOAST_DATUM_COPY(PG_GETARG_DATUM(x))))
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#define PG_GETARG_LTXTQUERY(x) ((ltxtquery*)DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(x))))
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#define PG_GETARG_LTXTQUERY_COPY(x) ((ltxtquery*)DatumGetPointer(PG_DETOAST_DATUM_COPY(PG_GETARG_DATUM(x))))
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/* GiST support for ltree */
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#define BITBYTE 8
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#define SIGLENINT 2
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#define SIGLEN ( sizeof(int32)*SIGLENINT )
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#define SIGLENBIT (SIGLEN*BITBYTE)
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typedef unsigned char BITVEC[SIGLEN];
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typedef unsigned char *BITVECP;
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#define LOOPBYTE \
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for(i=0;i<SIGLEN;i++)
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#define GETBYTE(x,i) ( *( (BITVECP)(x) + (int)( (i) / BITBYTE ) ) )
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#define GETBITBYTE(x,i) ( ((unsigned char)(x)) >> i & 0x01 )
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#define CLRBIT(x,i) GETBYTE(x,i) &= ~( 0x01 << ( (i) % BITBYTE ) )
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#define SETBIT(x,i) GETBYTE(x,i) |= ( 0x01 << ( (i) % BITBYTE ) )
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#define GETBIT(x,i) ( (GETBYTE(x,i) >> ( (i) % BITBYTE )) & 0x01 )
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#define HASHVAL(val) (((unsigned int)(val)) % SIGLENBIT)
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#define HASH(sign, val) SETBIT((sign), HASHVAL(val))
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/*
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* type of index key for ltree. Tree are combined B-Tree and R-Tree
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* Storage:
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* Leaf pages
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* (len)(flag)(ltree)
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* Non-Leaf
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* (len)(flag)(sign)(left_ltree)(right_ltree)
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* ALLTRUE: (len)(flag)(left_ltree)(right_ltree)
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*
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*/
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typedef struct
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{
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int32 vl_len_; /* varlena header (do not touch directly!) */
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uint32 flag;
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char data[FLEXIBLE_ARRAY_MEMBER];
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} ltree_gist;
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#define LTG_ONENODE 0x01
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#define LTG_ALLTRUE 0x02
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#define LTG_NORIGHT 0x04
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#define LTG_HDRSIZE MAXALIGN(VARHDRSZ + sizeof(uint32))
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#define LTG_SIGN(x) ( (BITVECP)( ((char*)(x))+LTG_HDRSIZE ) )
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#define LTG_NODE(x) ( (ltree*)( ((char*)(x))+LTG_HDRSIZE ) )
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#define LTG_ISONENODE(x) ( ((ltree_gist*)(x))->flag & LTG_ONENODE )
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#define LTG_ISALLTRUE(x) ( ((ltree_gist*)(x))->flag & LTG_ALLTRUE )
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#define LTG_ISNORIGHT(x) ( ((ltree_gist*)(x))->flag & LTG_NORIGHT )
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#define LTG_LNODE(x) ( (ltree*)( ( ((char*)(x))+LTG_HDRSIZE ) + ( LTG_ISALLTRUE(x) ? 0 : SIGLEN ) ) )
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#define LTG_RENODE(x) ( (ltree*)( ((char*)LTG_LNODE(x)) + VARSIZE(LTG_LNODE(x))) )
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#define LTG_RNODE(x) ( LTG_ISNORIGHT(x) ? LTG_LNODE(x) : LTG_RENODE(x) )
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#define LTG_GETLNODE(x) ( LTG_ISONENODE(x) ? LTG_NODE(x) : LTG_LNODE(x) )
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#define LTG_GETRNODE(x) ( LTG_ISONENODE(x) ? LTG_NODE(x) : LTG_RNODE(x) )
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/* GiST support for ltree[] */
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#define ASIGLENINT (7)
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#define ASIGLEN (sizeof(int32)*ASIGLENINT)
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#define ASIGLENBIT (ASIGLEN*BITBYTE)
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typedef unsigned char ABITVEC[ASIGLEN];
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#define ALOOPBYTE \
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for(i=0;i<ASIGLEN;i++)
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#define AHASHVAL(val) (((unsigned int)(val)) % ASIGLENBIT)
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#define AHASH(sign, val) SETBIT((sign), AHASHVAL(val))
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/* type of key is the same to ltree_gist */
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#endif
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