help.inc
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上传日期:2013-04-11
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操作系统开发
开发平台:
Visual C++
- ;
- ;* help.h
- ;*
- ;* typedefs & definitions used in the help system and by those who use it.
- ;*
- ;* define:
- ;* HOFFSET - to define buffer pointers (PB's) as handle/offset, else
- ;* they are defined as void far *.
- ;
- ;
- ;* lineattr
- ;* external representation of line attributes, as returned by HelpGetLineAttr
- ;
- lineattr struc
- attrLA dw 0
- cbLA dw 0
- lineattr ends
- ;
- ;* mh
- ;* a memory handle is defined for use with systems that use dynamic, moveable
- ;* memory. It is long, so that in simple cases where memory is NOT moveable,
- ;* the handle can contain the far pointer to the base.
- ;
- ;
- ;* nc
- ;* a context number is a unique id associated with each context string.
- ;
- ;
- ;* topichdr
- ;* header placed (by HelpDecomp) at the begining of every decompressed topic
- ;
- topichdr struc
- appCharTH db 0
- linCharTH db 0
- ftypeTH db 0
- lnCurTH dw 0
- lnOffTH dw 0
- topichdr ends
- ;
- ;* hotspot
- ;* defines the position of an embedded cross reference, or "hotspot". Used by
- ;* HelpHlNext and HelpXRef
- ;
- hotspot struc
- lineHS dw 0
- colHS dw 0
- ecolHS dw 0
- pXrefHS dd 0
- hotspot ends
- ;******************************************************************************
- ;*
- ;* Some versions of the help engine run with SS!=DS, and thus require the
- ;* _loadds attribute on function calls.
- ;
- ifdef DSLOAD
- else
- LOADDS equ 1
- endif
- ;******************************************************************************
- ;*
- ;* PB
- ;* pointer to a buffer. Based on the switch HOFFSET, it is either a
- ;* handle-offset or a far pointer. In the handle/offset case, the high word
- ;* contains a memory handle which must be locked, to get a "real" address, to
- ;* which the offset is added.
- ;
- ifdef HOFFSET
- else
- endif
- ;******************************************************************************
- ;*
- ;* Forward declarations
- ;
- ;******************************************************************************
- ;*
- ;* constant declarations
- ;*
- ;* Character attribute bits. These bits are order together to form attribute
- ;* indecies. Data in the help file has associated with it attribute information
- ;* encoded in length/index pairs. Each index is simply a constant which
- ;* indicates which of several attributes should be applied to the characters in
- ;* that portion of the line.
- ;
- A_PLAIN equ 0
- A_BOLD equ 1
- A_ITALICS equ 2
- A_UNDERLINE equ 4
- ;******************************************************************************
- ;*
- ;* Help Error Codes.
- ;*
- ;* Return values greater than HELPERR_MAX are valid nc's.
- ;
- HELPERR_FNF equ 1
- HELPERR_READ equ 2
- HELPERR_LIMIT equ 3
- HELPERR_BADAPPEND equ 4
- HELPERR_NOTHELP equ 5
- HELPERR_BADVERS equ 6
- HELPERR_MAX equ 10