mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
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578 lines
21 KiB
578 lines
21 KiB
/*************************************************************************
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* *
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* ISEARCH.H *
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* *
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* Copyright (C) Microsoft Corporation 1990-1992 *
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* All Rights reserved. *
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* *
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**************************************************************************
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* *
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* Module Intent *
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* Common defines internal to the searcher. None of this stuff is *
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* available outside the search engine. *
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* *
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**************************************************************************
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* *
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* Current Owner: BinhN *
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* *
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**************************************************************************
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* *
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* Released by Development: (date) *
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* *
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*************************************************************************/
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// Critical structures that gets messed up in /Zp8
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#pragma pack(1)
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#define occifNONE 0x0000 // No flags.
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#define occifEOF 0x0001 // End of file.
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#define occifWRITTEN 0x0002 // This occurrence has been written.
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#define occifMATCH 0x0004 // This occurrence is a match.
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#define occifHAS_MATCH 0x0008 // Don't do combination this pass.
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/**************************************************************************
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*
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* SYMBOLS STRUCTURE
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*
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**************************************************************************/
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#define cWordsPerToken 5 // a guess at average number of stemmed or wildcard variants
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typedef struct WORDINFO
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{
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struct WORDINFO FAR *pNext;
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// Term frequency
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DWORD cTopic;
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// Word data information
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FILEOFFSET foData;
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DWORD cbData;
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WORD wRealLength; // Real word length
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} WORDINFO, FAR *LPWORDINFO;
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typedef struct STRING_TOKEN {
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struct STRING_TOKEN FAR *pNext;
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LPB lpString; // String itself
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WORD cUsed; // Times this string appears in the query
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WORD wWeight; // Weight of the word
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WORD wWeightRemain; // Sum of term weights AFTER this one in the list
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LPWORDINFO lpwi; // List of word data for this token
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DWORD dwTopicCount;
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} STRING_TOKEN;
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/* Set the default size of a string block. Assuming that a word length
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* is 6, allocate enough memory for 20 words
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*/
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#define STRING_BLOCK_SIZE (sizeof(STRING_TOKEN) + 6) * 20
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/* String flags */
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#define EXACT_MATCH 0x01
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#define WILDCARD_MATCH 0x02
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#define TERM_RANGE_MATCH 0x03
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/**************************************************************************
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*
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* QUERY TREE STRUCTURE & FUNCTIONS
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*
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**************************************************************************/
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#define MAX_QUERY_NODE 0xFFFF // Maximum number of tokens in a query
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#define TOPICLIST_NODE 0x01 // The node is a topicId node
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#define OCCURENCE_NODE 0x02 // The node is an occurrence node
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#define NODE_TYPE_MASK 0x0f
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#define DONT_FREE 0x10 // Don't free the node after unlink
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#define STACK_SIZE 15 // Maximum level of stack
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// This is an information buffer structure that you pass to "HitListGetTopic"
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// which fills in its fields. You can look at the fields not marked as
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// "internal", and also pass it to other API functions.
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#define TOPIC_INFO \
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WORD wWeight; /* Topicument-weight. */ \
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DWORD dwTopicId; /* Topic-ID associated with this hit. */ \
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DWORD lcOccur /* Number of occurrences (hits) */
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typedef struct SNGLINK
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{
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struct SNGLINK FAR *pNext;
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} SGNLINK, FAR *LPSLINK;
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// Internal Occurrence structure
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// Be careful when changing the fields of it. See MARKER struct below
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typedef struct OCCURENCE
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{
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struct OCCURENCE FAR *pNext;
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WORD fFlag; /* Various flags */
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WORD cLength; /* Word length */
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DWORD dwCount; /* Word Count, needed for phrase */
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DWORD dwOffset; /* Word offset, needed for hilite */
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DWORD dwFieldId; /* Field id (_DEBUG only) */
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WORD wWeight; /* Hit weight */
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LPVOID lpvTerm; /* Pointer to a term in WORD-prefix length
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* Unicode format, i.e. a "wide ST".
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*/
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#if defined (_MIPS) || defined (ppc)
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WORD wPad;
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DWORD dwPad;
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#endif
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} OCCURENCE, FAR *LPIOCC;
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/* Marker node. Be careful when changing the fields of it.
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* 1/ The size of it must be <= the size of an OCCURENCE
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* 2/ Location of pNext and fFlag must be the same between the two
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* structure */
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typedef struct MARKER
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{
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struct OCCURENCE FAR *pNext;
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WORD fFlag; /* Various flags */
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WORD Unused; /* Unused */
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struct MARKER FAR *pPrevMark; /* Previous marker */
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struct MARKER FAR *pNextMark; /* Next marker */
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} MARKER, FAR *LPMARKER;
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/* Occurrence flags */
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#define TO_BE_KEPT 0x01
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#define TO_BE_SKIPPED 0x02
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#define TO_BE_COMPARED 0x04
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#define IS_LAST_NODE 0x08
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#define IS_MARKER_NODE 0x10
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/* Internal Topic List structure */
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typedef struct TOPIC_LIST
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{
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struct TOPIC_LIST FAR * pNext;
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LPIOCC lpOccur; // Pointer to occurrence lists
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unsigned short fFlag; // Various flags, such as TO_BE_KEPT
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TOPIC_INFO;
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} TOPIC_LIST;
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typedef TOPIC_LIST FAR *LPITOPIC;
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/* TopicId node flags */
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#define TO_BE_KEPT 0x01
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#define HAS_MARKER 0x02
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#define IS_MARKER_NODE 0x10
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#define WRITTEN_TO_DISK 0x20
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#define DL_NEXT(p) (((LPITOPIC)p)->pNext)
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#define DL_OCCUR(p) (((LPITOPIC)p)->lpOccur)
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/* QueryInfo flags */
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#define IN_PHRASE 0x0001
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#define FREE_CHARTAB 0x0002
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#define FORCED_PHRASE 0x0004
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#define CW_PHRASE 0x0010 // Must match COMPOUNDWORD_PHRASE in medv20.h
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/* Query info node */
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typedef struct QueryInfo
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{
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LPB lpbQuery; // Query expression bytes.
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LPB pWhitespace; // Working variable for implicit phrase
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LPQT lpQueryTree; // Query tree.
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LPV lpStack; // Pointer to operator's stack
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DWORD dwOffset; // Current offset
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BREAKER_FUNC lpfnBreakFunc;
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LPSIPB lpStopListInfo; // Associated stop list info
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LPCHARTAB lpCharTab; // Pointer to character table
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LPOPSYM lpOpSymTab; // Operator symbol table
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LPERRB lperrb; // Error buffer
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DWORD fFlag; // Flag
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WORD cOpEntry; // Number of operator entries
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WORD Pad;
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} QUERY_INFO,
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FAR *LPQI;
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/* Parameter of an unary operator */
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typedef union NodeParm
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{
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VOID FAR *lpStruct;
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DWORD dwValue;
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} NODE_PARM;
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/* Query Tree nodes */
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#define OPERATOR_NODE 1 // Operator
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#define TERM_NODE 2 // A string to be searched for
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#define NULL_NODE 3 // A string that can't be found
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#define EXPRESSION_NODE 4 // The node contains the result
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#define STOP_NODE 5 // A stop word
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typedef struct QTNODE
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{
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struct QTNODE FAR *pNext;
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struct QTNODE FAR *pPrev;
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LPITOPIC lpTopicList; /* Topic linked list */
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union
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{
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STRING_TOKEN FAR *pToken; /* Word associated with this node */
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WORD wProxDist; /* Proximity distance */
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VOID FAR *lpStruct; /* Structure associated with unary op */
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} u;
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DWORD cTopic; // Number of TopicId lists of this node
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// This number will change when merging
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// gets involved
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// Max and Min topic id. This is useful for speeding up retrieval
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DWORD dwMaxTopicId; // Max topic Id in the list
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DWORD dwMinTopicId; // Min topic id in the list
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// Word data information
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FILEOFFSET foData;
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DWORD cbData;
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/* Characteristics associated with the node */
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LPB lpHiString; /* Hi limit of the string (for THRU) */
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LPGROUP lpGroup; /* Group associated with this node */
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DWORD dwFieldId; /* FieldID associated with term */
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WORD NodeType; /* What type (operator, term, etc) */
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WORD OpVal; /* Operator value */
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WORD iCurOff; // Offset to the beginning of the word
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WORD wRealLength; // Real word length
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LPVOID lpvIndexedTerm; /* Pointer to the term in the index that
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* currently matches this node. The term's
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* string is in WORD-prefix length Unicode
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* format, i.e. a "wide ST".
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*/
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// General info
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WORD fFlag; /* Various flags */
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WORD Offset; /* Offset from the beginning of the query */
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WORD wBrkDtype; /* Breaker's dtype (for THRU) */
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WORD Pad;
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} QTNODE, FAR *_LPQTNODE;
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#define QTN_LEFT(p) (((QTNODE FAR *)p)->pPrev)
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#define QTN_RIGHT(p) (((QTNODE FAR *)p)->pNext)
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#define QTN_PREV(p) (((QTNODE FAR *)p)->pPrev)
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#define QTN_NEXT(p) (((QTNODE FAR *)p)->pNext)
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#define QTN_NODETYPE(p) (((QTNODE FAR *)p)->NodeType)
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#define QTN_OPVAL(p) (((QTNODE FAR *)p)->OpVal)
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#define QTN_TOPICLIST(p) (((QTNODE FAR *)p)->lpTopicList)
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#define QTN_TOKEN(p) (((QTNODE FAR *)p)->u.pToken)
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#define QTN_PARMS(p) (((QTNODE FAR *)p)->u.lpStruct)
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#define QTN_FLAG(p) (((QTNODE FAR *)p)->fFlag)
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#define QTN_HITERM(p) (((QTNODE FAR *)p)->lpHiString)
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#define QTN_OFFSET(p) (((QTNODE FAR *)p)->Offset)
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#define QTN_FIELDID(p) (((QTNODE FAR *)p)->dwFieldId)
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#define QTN_DTYPE(p) (((QTNODE FAR *)p)->wBrkDtype)
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#define QTN_GROUP(p) (((QTNODE FAR *)p)->lpGroup)
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/* Block of query's nodes. We allocate 16 nodes per block */
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#define QUERY_BLOCK_SIZE sizeof(QTNODE)*16
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#define cTOPIC_PER_BLOCK 500
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#define cOCC_PER_BLOCK 1000
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/* Query tree's flags */
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#define TO_BE_SORTED 0x0001
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#define HAS_NEAR_RESULT 0x0002
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#define ALL_OR 0x0004
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#define ALL_AND 0x0008
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#define PROCESSED 0x0010
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#define ALL_ANDORNOT 0x0020
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/* Query tree structure */
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typedef struct QTREE
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{
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CUSTOMSTRUCT cStruct; /* Structure's handle, MUST BE 1ST FIELD!! */
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LONG cQuery; /* Note: this can't be unsigned */
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DWORD dwcOccFields; /* Occurence fields count */
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DWORD dwOccSize; /* Occurence node size */
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/* Unary operator related fields */
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LPGROUP lpGroup; /* Group associated with all terms */
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DWORD dwFieldId; /* Field-ID assigned to all followed terms.*/
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WORD wProxDist; /* Proximity distance */
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WORD iDefaultOp; /* Default operator. */
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WORD wBrkDtype; /* Breaker's dtype (for THRU) */
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WORD fFlag; /* Various querytree flags */
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/* String table */
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LPV lpStringBlock; /* String's memory block */
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STRING_TOKEN FAR *lpStrList;/* Pointer to strings table */
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LPV lpWordInfoBlock;
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/* Topic list related global variables */
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LPV lpTopicMemBlock; /* Pointer to Topic memory block */
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LPITOPIC lpTopicStartSearch; /* Starting node for searching */
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LPSLINK lpTopicFreeList; /* Pointer to free doc list */
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DWORD dwTopicNodeCnt;
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/* Occ list related global variables */
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LPV lpOccMemBlock; /* Pointer to Occ memory block */
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LPIOCC lpOccStartSearch; /* Starting occurrence for searching */
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LPSLINK lpOccFreeList; /* Pointer to free occurrence list */
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DWORD dwOccNodeCnt;
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/* Buffer for the tree's nodes */
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LPV lpNodeBlock; /* Nodes memory block */
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_LPQTNODE lpTopNode; /* Pointer to top node */
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/* Index information */
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FILEOFFSET foIdxRoot; /* Top node offset */
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DWORD dwBlockSize; /* Index block size */
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WORD TreeDepth; /* Depth of tree */
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WORD cIdxLevels; /* Index's depth */
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OCCF occf;
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IDXF idxf;
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CKEY ckeyTopicId; // 2-bytes
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CKEY ckeyOccCount; // 2-bytes
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CKEY ckeyWordCount;
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CKEY ckeyOffset;
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/* MAGIC value... */
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LONG magic;
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/* Interrupt flag for online use. Online apps don't have callbacks
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* so we have to provide an API to set this flag
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*/
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BYTE cInterruptCount; /* Interrupt checking */
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BYTE fInterrupt;
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/* Similarity stuff */
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LPV lpDocScores;
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} QTREE,
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FAR *_LPQT;
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#define HQUERY_MAGIC 0x04121956
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// This defines the "type" of word term node.
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#define TERM_EXACT 1 // "Standard" term.
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#define TERM_PREFIX 2 // "Wildcard" term.
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#define TERM_RANGE 3 // Range term. This says "give me everything
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// between some low bound and some high
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// bound."
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/*
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* This defines the value or type of operator node. It corresponds to
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* the OpVal field of struct OPSYM
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*/
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#define AND_OP 0 // AND operator
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#define OR_OP 1 // OR operator
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#define NOT_OP 2 // NOT operator
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#define PHRASE_OP 3 // PHRASE operator
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#define NEAR_OP 4 // NEAR operator
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#define MAX_DEFAULT_OP OR_OP // Maximum value of default operator
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#define RANGE_OP 5
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#define GROUP_OP 6
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#define FIELD_OP 7
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#define BRKR_OP 8
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#define MAX_OPERATOR 8
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#define STOP_OP 9 // stop word
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#define QUOTE 50
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#define RIGHT_PAREN 51
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#define LEFT_PAREN 52
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#define TERM_TOKEN 53
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/* Operator type */
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#define BINARY_OP 0x01
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#define UNARY_OP 0x02
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#define PARSE_TOKEN 0x04
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/* Operator attribute */
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#define COMMUTATIVE 0x10 // a * b = b * a
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#define ASSOCIATIVE 0x20 // a * (b * c) = (a * b) * c
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#define ZERO 0x40 // a * a = a
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extern WORD OperatorAttributeTable[];
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/*
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* Those are properties of a binary node expression.
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*/
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#define EXPRESSION_TERM 1 // One branch is an expression, one
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// is a term
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#define EXPRESSION_EXPRESSION 2 // Both branches are expressions
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#if 1
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typedef ERR (PASCAL NEAR *FNHANDLER) (LPQT, _LPQTNODE, LPITOPIC, LPV, int);
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#else
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typedef ERR (PASCAL NEAR *FNHANDLER) (LPQT, LPV, LPV, LPV, int);
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#endif
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#define ORDERED_BASED 1 // Based on topicId numbered
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#define HIT_COUNT_BASED 2 // Based doc's hit count
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#define WEIGHT_BASED 3 // based on doc's weight
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typedef struct RetVars
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{
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LPQT lpqt; // Pointer to query tree for global variables
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LPBYTE pLeadByteTable; // Pointer to lead byte table for DBCS
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DWORD dwTopicCount; // Number of topics
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DWORD dwFieldID; // Current fieldid
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DWORD cOccFields;
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DWORD dwOccSize;
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LPB lpbCur;
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NODEINFO LeafInfo;
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NODEINFO DataInfo;
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SRCHINFO SrchInfo; // Search information
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LCID lcid; // WIN32 locale ID specified at build time
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WORD wWordLength; // Word length
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WORD fFlag; // General flags
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BYTE pBTreeWord[CB_MAX_WORD_LEN]; // Buffer for the decoded word
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BYTE pModifiedWord[CB_MAX_WORD_LEN]; // Buffer for the modified word
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BYTE pStemmedBTreeWord[CB_MAX_WORD_LEN]; // Stemmed BTree word
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BYTE pStemmedQueryWord[CB_MAX_WORD_LEN]; // Stemmed searched word
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BYTE fRank; // If non-zero the result is ranked.
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BYTE pNodeBuf[BTREE_NODE_SIZE]; // Generic b-tree node buffer.
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BYTE pDataBuf[FILE_BUFFER];
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} RETV,
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FAR *LPRETV;
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/**************************************************************************
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*
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* OPEN INDEX STRUCTURE
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*
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**************************************************************************/
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typedef struct Idx
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{
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GHANDLE hStruct; // Handle to this structure.
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DWORD dwKey;
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FCALLBACK_MSG Callback;
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LPBYTE pLeadByteTable; // Pointer to table of DBCS lead bytes
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HANDLE hLeadByteTable;
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IH20 ih; // Index header.
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HFPB hfpbIdxSubFile; // Index file handle. If this is NULL, the
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// index isn't open, else it is.
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//HFPB hfpbSysFile; // Handle of Index File system
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GHANDLE hTopNode; // Handle to "lrgbTopNode".
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LRGB lrgbTopNode; // Pointer to the index top node.
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FLOAT fSigmaTable; // Sigma table
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HANDLE hSigma; // Handle of sigma table
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LPERRB lperrb; // Pointer to error block
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WORD wSlackSize; // Size of slack in a node
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WORD Pad;
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} IDX,
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FAR *_LPIDX; // The "_" indicates that this is
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// a private structure that needs
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// to be available publicly. The
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// public will call this an "LPIDX".
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/*************************************************************************
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*
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* Hitlist structure
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*
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*************************************************************************/
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typedef struct HitList
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{
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GHANDLE hStruct; // Structure's handle. MUST BE 1ST FIELD
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DWORD lcReturnedTopics; // The number of Topics returned. (what the user wants)
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DWORD lcTotalNumOfTopics; // The total number of topics hit by the query.
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LPITOPIC lpTopicList; // Starting of TopicList
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LPBLK lpOccMemBlock; // Pointer to Occ memory block
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LPBLK lpTopicMemBlock; // Pointer to Topic memory block
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/* All the following fields are for internal use only */
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LPVOID lpHttpQ; // for online search only
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DWORD lcMaxTopic; // Max TopicId number (internal)
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LPITOPIC lpLastTopic; // Last accessed Topic pointer (internal)
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DWORD lLastTopicId; // Last accessed TopicId (internal)
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/* Topic list cache */
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GHANDLE hTopic; // Handle to Topic file
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GHANDLE hTopicCache; // Handle to Topic cache
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LPITOPIC lpTopicCache; // Cache for Topic info
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DWORD dwTopicCacheStart; // Starting Topic number if the cache
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DWORD dwTopicInCacheCount; // Number of topic currently in cache
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/* Occurrence cache */
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GHANDLE hOcc; // Handle to occurrences file
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GHANDLE hOccCache; // Handle to Occ cache
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DWORD dwCurTopic; // Current doc that the hit list belongs to
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LPIOCC lpOccCache; // Cache for Occ info
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DWORD dwOccCacheStart; // Starting Occ number if the cache
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/* Various hitlist info for hitlist merge */
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struct HitList FAR * lpMainHitList;
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struct HitList FAR * lpUpdateHitList;
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BYTE lszTopicName[cbMAX_PATH]; // Topic filename
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BYTE lszOccName[cbMAX_PATH]; // Occ filename
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} HL, FAR *_LPHL;
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#define DO_FAST_MERGE(pSrch, lpqt) (((pSrch)->Flag & QUERYRESULT_SKIPOCCINFO) && ((lpqt)->fFlag & ALL_ANDORNOT))
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/*************************************************************************
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*
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* Global Variables
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*
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* Those variables should be read only
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*************************************************************************/
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extern FNHANDLER HandlerFuncTable[];
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extern OPSYM OperatorSymbolTable[];
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extern OPSYM FlatOpSymbolTable[];
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extern BYTE LigatureTable[];
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/*************************************************************************
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*
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* Functions Prototypes
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*
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*************************************************************************/
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/* qtparse.c */
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PUBLIC LPQT PASCAL NEAR QueryTreeAlloc(void);
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PUBLIC ERR PASCAL NEAR QueryTreeAddToken (_LPQT, int, LST, DWORD, BOOL);
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PUBLIC LPQT PASCAL NEAR QueryTreeBuild (LPQI);
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#if defined(_DEBUG) && DOS_ONLY
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PUBLIC ERR PASCAL FAR PrintList(LPQT);
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#endif
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/* search.c */
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PUBLIC ERR PASCAL NEAR ResolveTree(LPIDX, _LPQTNODE, LPRETV, BOOL);
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PUBLIC BOOL NEAR PASCAL FGroupLookup(LPGROUP, DWORD);
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/* qtlist */
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PUBLIC TOPIC_LIST FAR* PASCAL NEAR TopicNodeAllocate(LPQT);
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PUBLIC VOID PASCAL NEAR TopicNodeFree (LPQT, _LPQTNODE, LPITOPIC, LPITOPIC);
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PUBLIC ERR PASCAL NEAR TopicNodeInsert (LPQT, _LPQTNODE, LPITOPIC);
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PUBLIC LPITOPIC PASCAL NEAR TopicNodeSearch(LPQT, _LPQTNODE, DWORD);
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PUBLIC LPIOCC PASCAL NEAR OccNodeAllocate(LPQT);
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PUBLIC LPIOCC PASCAL NEAR OccNodeSearch(LPQT, LPITOPIC , LPIOCC );
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PUBLIC ERR PASCAL NEAR OccNodeInsert(LPQT, LPITOPIC, LPIOCC);
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PUBLIC int PASCAL NEAR OccCompare(LPIOCC, LPIOCC);
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PUBLIC VOID PASCAL NEAR RemoveNode(LPQT, LPV, LPSLINK, LPSLINK, int);
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PUBLIC VOID PASCAL NEAR FreeTree (_LPQTNODE);
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/* combine.c */
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PUBLIC VOID PASCAL NEAR RemoveUnmarkedTopicList (LPQT, _LPQTNODE, BOOL);
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PUBLIC VOID PASCAL NEAR RemoveUnmarkedNearTopicList (_LPQT, _LPQTNODE);
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PUBLIC VOID PASCAL NEAR MarkTopicList (_LPQTNODE);
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PUBLIC VOID PASCAL NEAR MergeOccurence(LPQT, LPITOPIC , LPITOPIC);
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PUBLIC VOID PASCAL NEAR SortResult (LPQT, _LPQTNODE, WORD);
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PUBLIC ERR PASCAL NEAR OrHandler(LPQT, _LPQTNODE, LPITOPIC, LPV, int);
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PUBLIC ERR PASCAL NEAR AndHandler(LPQT, _LPQTNODE, LPITOPIC, LPV, int);
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PUBLIC ERR PASCAL NEAR NotHandler(LPQT, _LPQTNODE, LPITOPIC, LPV, int);
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PUBLIC ERR PASCAL NEAR NearHandler(LPQT, _LPQTNODE, LPITOPIC, LPV, int);
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PUBLIC ERR PASCAL NEAR PhraseHandler(LPQT, _LPQTNODE, LPITOPIC, LPV, int);
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PUBLIC VOID PASCAL NEAR NearHandlerCleanUp (LPQT, _LPQTNODE);
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PUBLIC ERR PASCAL NEAR TopicListSort (_LPQTNODE lpQtNode, BOOL fFlag);
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// Critical structures that gets messed up in /Zp8
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#pragma pack()
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