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Text parser rewritten:

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- supports multibyte encodings
        - more strict rules for lexemes
        - flex isn't used
Add:
        - tsquery plainto_tsquery(text)
          Function makes tsquery from plain text.
        - &&, ||, !! operation for tsquery for combining
          tsquery from it's parts:  'foo & bar' || 'asd' => 'foo & bar | asd'
This commit is contained in:
Teodor Sigaev
2005-11-21 12:27:57 +00:00
parent b91e6ed93e
commit c52795d18a
15 changed files with 1613 additions and 424 deletions
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147
contrib/tsearch2/wordparser/parser.h
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@ -1,10 +1,147 @@
#ifndef __PARSER_H__
#define __PARSER_H__
extern char *token;
extern int tokenlen;
int tsearch2_yylex(void);
void tsearch2_start_parse_str(char *, int);
void tsearch2_end_parse(void);
#include <ctype.h>
#include <limits.h>
#include "ts_locale.h"
typedef enum {
TPS_Base = 0,
TPS_InUWord,
TPS_InLatWord,
TPS_InCyrWord,
TPS_InUnsignedInt,
TPS_InSignedIntFirst,
TPS_InSignedInt,
TPS_InSpace,
TPS_InUDecimalFirst,
TPS_InUDecimal,
TPS_InDecimalFirst,
TPS_InDecimal,
TPS_InVersionFirst,
TPS_InVersion,
TPS_InMantissaFirst,
TPS_InMantissaSign,
TPS_InMantissa,
TPS_InHTMLEntityFirst,
TPS_InHTMLEntity,
TPS_InHTMLEntityNumFirst,
TPS_InHTMLEntityNum,
TPS_InHTMLEntityEnd,
TPS_InTagFirst,
TPS_InTagCloseFirst,
TPS_InTag,
TPS_InTagEscapeK,
TPS_InTagEscapeKK,
TPS_InTagBackSleshed,
TPS_InTagEnd,
TPS_InCommentFirst,
TPS_InCommentLast,
TPS_InComment,
TPS_InCloseCommentFirst,
TPS_InCloseCommentLast,
TPS_InCommentEnd,
TPS_InHostFirstDomen,
TPS_InHostDomenSecond,
TPS_InHostDomen,
TPS_InPortFirst,
TPS_InPort,
TPS_InHostFirstAN,
TPS_InHost,
TPS_InEmail,
TPS_InFileFirst,
TPS_InFile,
TPS_InFileNext,
TPS_InURIFirst,
TPS_InURIStart,
TPS_InURI,
TPS_InFURL,
TPS_InProtocolFirst,
TPS_InProtocolSecond,
TPS_InProtocolEnd,
TPS_InHyphenLatWordFirst,
TPS_InHyphenLatWord,
TPS_InHyphenCyrWordFirst,
TPS_InHyphenCyrWord,
TPS_InHyphenUWordFirst,
TPS_InHyphenUWord,
TPS_InHyphenValueFirst,
TPS_InHyphenValue,
TPS_InHyphenValueExact,
TPS_InParseHyphen,
TPS_InParseHyphenHyphen,
TPS_InHyphenCyrWordPart,
TPS_InHyphenLatWordPart,
TPS_InHyphenUWordPart,
TPS_InHyphenUnsignedInt,
TPS_InHDecimalPartFirst,
TPS_InHDecimalPart,
TPS_InHVersionPartFirst,
TPS_InHVersionPart,
TPS_Null /* last state (fake value) */
} TParserState;
/* forward declaration */
struct TParser;
typedef int (*TParserCharTest)(struct TParser*); /* any p_is* functions except p_iseq */
typedef void (*TParserSpecial)(struct TParser*); /* special handler for special cases... */
typedef struct {
TParserCharTest isclass;
char c;
uint16 flags;
TParserState tostate;
int type;
TParserSpecial special;
} TParserStateActionItem;
typedef struct {
TParserState state;
TParserStateActionItem *action;
} TParserStateAction;
typedef struct TParserPosition {
int posbyte; /* position of parser in bytes */
int poschar; /* osition of parser in characters */
int charlen; /* length of current char */
int lenbytelexeme;
int lencharlexeme;
TParserState state;
struct TParserPosition *prev;
int flags;
TParserStateActionItem *pushedAtAction;
} TParserPosition;
typedef struct TParser {
/* string and position information */
char *str; /* multibyte string */
int lenstr; /* length of mbstring */
wchar_t *wstr; /* wide character string */
int lenwstr; /* length of wsting */
/* State of parse */
int charmaxlen;
bool usewide;
TParserPosition *state;
bool ignore;
bool wanthost;
/* silly char */
char c;
/* out */
char *lexeme;
int lenbytelexeme;
int lencharlexeme;
int type;
} TParser;
TParser* TParserInit( char *, int );
bool TParserGet( TParser* );
void TParserClose( TParser* );
#endif