mirror of https://github.com/GnoConsortium/gno.git
83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
/*
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* STEVIE - Simply Try this Editor for VI Enthusiasts
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*
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* Code Contributions By : Tim Thompson twitch!tjt
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* Tony Andrews onecom!wldrdg!tony
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* G. R. (Fred) Walter watmath!grwalter
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*/
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/*
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* gchar(lp) - get the character at position "lp"
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*/
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#define gchar(lp) ((lp)->linep->s[(lp)->index])
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/*
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* pchar(lp, c) - put character 'c' at position 'lp'
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*/
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#define pchar(lp, c) ((lp)->linep->s[(lp)->index] = (c))
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/*
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* pswap(a, b) - swap two position pointers
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*/
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#define pswap(a, b) { LPtr \
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pswaptmp; pswaptmp = a; a = b; b = pswaptmp; }
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/*
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* Position comparisons
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*/
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#define lt(a, b) ((LINEOF(a) != LINEOF(b)) \
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? (LINEOF(a) < LINEOF(b)) : ((a)->index < (b)->index))
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#define ltoreq(a, b) ((LINEOF(a) != LINEOF(b)) \
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? (LINEOF(a) < LINEOF(b)) : ((a)->index <= (b)->index))
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#define gt(a, b) ((LINEOF(a) != LINEOF(b)) \
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? (LINEOF(a) > LINEOF(b)) : ((a)->index > (b)->index))
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#define gtoreq(a, b) ((LINEOF(a) != LINEOF(b)) \
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? (LINEOF(a) > LINEOF(b)) : ((a)->index >= (b)->index))
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#define equal(a, b) (((a)->linep == (b)->linep) && ((a)->index == (b)->index))
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/*
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* anyinput
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*
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* Return non-zero if input is pending.
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*/
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#define anyinput() (Readbuffptr != NULL)
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/*
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* buf1line() - return TRUE if there is only one line in file buffer
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*/
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#define buf1line() (Filemem->linep->next == Fileend->linep)
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/*
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* bufempty() - return TRUE if the file buffer is empty
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*/
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#define bufempty() (buf1line() && Filemem->linep->s[0] == NUL)
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/*
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* lineempty() - return TRUE if the line is empty
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*/
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#define lineempty(p) ((p)->linep->s[0] == NUL)
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/*
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* startofline() - return TRUE if the given position is at start of line
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*/
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#define startofline(p) ((p)->index == 0)
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/*
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* endofline() - return TRUE if the given position is at end of line
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*
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* This routine will probably never be called with a position resting on the NUL
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* byte, but handle it correctly in case it happens.
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*/
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#define endofline(p) \
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((p)->linep->s[(p)->index] == NUL || (p)->linep->s[(p)->index + 1] == NUL)
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/*
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* RowNumber() - return the row number (if no UndoInProgress)
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*/
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#define RowNumber(p) (UndoInProgress ? 0 : cntllines(Filemem, (p)))
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