93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
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/*
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** helpsys.h - Help system internal definitions
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**
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** Copyright <C> 1987, Microsoft Corporation
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**
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** Purpose:
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** Contains definitions used within the help system.
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**
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** Revision History:
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**
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** 12-Mar-1990 CloseFile -> HelpCloseFile
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** 22-Jan-1990 MAXFILES from 50 to 100
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** [] 14-Dec-1987 Created
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**
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*/
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/*
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** definitions
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*/
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#ifndef NULL
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#define NULL 0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#define FALSE 0
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#endif
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#define ASCII 1 /* build with ASCII support */
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#define MAXBACK 20 /* max number of back-up's */
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#define MAXFILES 100 /* max number of open helpfiles */
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#define FTCOMPRESSED 0x01 /* 1=compressed, 0=ascii */
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#define FTFORMATTED 0x02 /* 1=formatted, 0=unformatted */
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#define FTMERGED 0x04 /* 1=merged index, 0=normal */
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#define REGISTER register
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#define HIGHONLY(l) ((ulong)l & 0xffff0000)
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#define HIGH(l) ((ushort)(HIGHONLY(l) >> 16))
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#define LOW(l) ((ushort)((ulong)l & 0xffff))
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/*
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** Forward declarations for client application call-back routines
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*/
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#if rjsa
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#define HelpDealloc(sel) DosFreeSeg(sel)
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#define HelpLock(sel) ((void *)((ulong)sel << 16))
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#define HelpUnlock(sel)
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#else
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#define HelpDealloc(x) free(x)
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#define HelpLock(x) (x)
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#define HelpUnlock(x)
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#endif
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void pascal HelpCloseFile(FILE *);
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mh pascal HelpAlloc(ushort);
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FILE * pascal OpenFileOnPath(char *, int);
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ulong pascal ReadHelpFile(FILE *, ulong, char *, ushort);
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/*
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** intlineattr
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** internal representation of lineattributes
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*/
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typedef struct intlineattr { /* ILA */
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uchar attr; /* attribute index */
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uchar cb; /* count of bytes */
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} intlineattr;
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/******************************************************************************
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**
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** PB maniputalors
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** Macros for locking and unlocking handle:offsets, as appropriate.
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*/
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#ifdef HOFFSET
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#define PBLOCK(ho) (((char *)HelpLock(HIGH(ho))) + LOW(ho))
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#define PBUNLOCK(ho) HelpUnlock(HIGH(ho))
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#else
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#define PBLOCK(ho) ((void *)ho)
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#define PBUNLOCK(ho)
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#endif
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PCHAR pascal hlp_locate (SHORT ln, PCHAR pTopic);
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FILE *pathopen (char *name, char *buf, char *mode);
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