TEXT_SOURCE structure (indexsrv.h)

Contains information about text that the word breaker will process.

Syntax

typedef struct tagTEXT_SOURCE {
  PFNFILLTEXTBUFFER pfnFillTextBuffer;
  const WCHAR       *awcBuffer;
  ULONG             iEnd;
  ULONG             iCur;
} TEXT_SOURCE;

Members

pfnFillTextBuffer

Type: PFNFILLTEXTBUFFER

Pointer to a function, PFNFILLTEXTBUFFER that refills the awcBuffer with text from the source document.

awcBuffer

Type: WCHAR*

Pointer to a buffer that contains text from the source document for the word breaker to parse.

iEnd

Type: ULONG

Position of the last character in awcBuffer.

iCur

Type: ULONG

Position of the first character in awcBuffer.

Remarks

Windows Search populates the members of this structure when the word breaker is invoked and initialized. IWordBreaker::BreakText gets a pointer to a TEXT_SOURCE structure and calls PFNFILLTEXTBUFFER, the function pointed to by the pfnFillTextBuffer member, to refill awcBuffer until all text from the source is processed. The PFNFILLTEXTBUFFER function returns an HRESULT that includes both filtering and word-breaking return values.

The filtering return values are the following:

• FILTER_E_NO_MORE_VALUES
• FILTER_E_NO_TEXT
• FILTER_E_NO_VALUES
• FILTER_E_NO_MORE_TEXT
• FILTER_E_END_OF_CHUNKS

The word-breaking return value is WBREAK_E_END_OF_TEXT. For more information about word-breaking return values, see Word-Breaking Values.

Requirements

See also

IWordBreaker::BreakText