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Annotation of 43BSD/contrib/B/src/bed/supr.h, revision 1.1

1.1     ! root        1: /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1984. */
        !             2: /* $Header: supr.h,v 2.2 84/07/11 15:20:05 guido Exp $ */
        !             3: 
        !             4: /*
        !             5:  * B editor -- Superstructure for fine focusing.
        !             6:  */
        !             7: 
        !             8: /*
        !             9:  * Interpretation of mode and s1, s2, s3:
        !            10:  * WHOLE: whole node is the focus;
        !            11:  * SUBSET: s1/2, s2/2 are first and last child number under focus;
        !            12:  *         even means fixed text, odd means child node;
        !            13:  * SUBRANGE: s1/2 is fixed text number; s2, s3 are 1st&last char;
        !            14:  *         if s1 is odd, ditto for child which must be "text";
        !            15:  * VHOLE: s1/2 is fixed text number; volatile hole before char s2;
        !            16:  *         if s1 is odd, ditto for child which must be "text".
        !            17:  * ATEND: a volatile hole just after the entire node.
        !            18:  * ATBEGIN: ditto just before it.
        !            19:  * SUBLIST: s3 indicates how many times downrite() bring us
        !            20:  *         beyond the focus (i.e., the focus is the subtree below
        !            21:  *         ep->focus EXCLUDING the subtree reached after s3 times
        !            22:  *         downrite().  Note s3 > 0.
        !            23:  * FHOLE: Like VHOLE but in Fixed text.
        !            24:  *
        !            25:  * It is assumed that if the focus is a substring of fixed text
        !            26:  * (SUBRANGE, VHOLE), it does not begin or end with lay-out of spaces.
        !            27:  */
        !            28: 
        !            29: #define WHOLE  'W'
        !            30: #define SUBSET 'S'
        !            31: #define SUBRANGE       'R'
        !            32: #define VHOLE  'V'
        !            33: #define ATEND  'E'
        !            34: #define ATBEGIN        'B'
        !            35: #define SUBLIST        'L'
        !            36: #define FHOLE  'F'
        !            37: 
        !            38: typedef struct {
        !            39:        path focus;
        !            40:        char mode;
        !            41:        char /*bool*/ copyflag;
        !            42:        char /*bool*/ spflag;
        !            43:        char /*bool*/ changed;
        !            44:        short /*0..2*MAXCHILD+1*/ s1;
        !            45:        short s2;
        !            46:        short s3;
        !            47:        short highest;
        !            48:        value copybuffer; /* Actually, a queue */
        !            49:        value oldmacro; /* A text */
        !            50:        value newmacro; /* A text, too */
        !            51:        int generation;
        !            52: } environ;
        !            53: 
        !            54: #ifdef STRUCTASS
        !            55: #define Emove(e1, e2) ((e2) = (e1))
        !            56: #else !STRUCTASS
        !            57: #define Emove(e1, e2) emove(&(e1), &(e2))
        !            58: #endif !STRUCTASS
        !            59: #define Ecopy(e1, e2) ecopy(&(e1), &(e2))
        !            60: #define Erelease(e) erelease(&(e))

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