COP2/COP2_Parse.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *
 *      Mark Alexander
 *      Side Effects
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        COP2_Parse.h
 *
 * COMMENTS:
 *      Parses a plane creation expression.
 */
#ifndef COP2_PARSE_H
#define COP2_PARSE_H

#include "COP2_API.h"
#include <TIL/TIL_Defines.h>
class TIL_Sequence;
class UT_String;

class COP2_API COP2_Parse
{
public:
                COP2_Parse(TIL_Sequence *seq);
                ~COP2_Parse();

    // creates planes from the passed string.
    // syntax <Name> [(N)] [{C1,C2[,C3[,C4]]}] [:i8|i16|i32|f32[(B,W)]
    // Name             = vector name
    // N                = array size (int)
    // C1/C2/C3/C4      = component name
    // B/W              = Black/white points (int)
    int         parse(UT_String &create_string, TIL_DataFormat default_type,
                      int use_bw, int b, int w);

    // Scopes the channels in the sequence with the passed string
    // (sets the plane masks).
    // returns 0 if the scope string is invalid.
    // If allow_partially_scoped_planes is false, then entire planes are
    // scoped.
    int         scope(UT_String &scope_string, 
                      bool allow_partially_scoped_planes);

    void        frameScope(UT_String &frame_scope, bool scope,
                           int start, int length = 1);

    const char *getError() const;
    
private:
    int         parseSingle(char *create, int length);
    int         parseVector(char *comps, int length);
    int         parsePoints(char *pnts, int length);
    
    int         scopeSingle(char *scope, int length, 
                            bool allow_partially_scoped_planes);
    int         scopeArray(char *bounds, int length);

    void        createPlanes(const char *name);
    void        addError(const char *error);
    
    TIL_Sequence        *mySequence;

    // parsing stuff...
    TIL_DataFormat      myDefaultType;
    TIL_DataFormat      myPlaneType;
    int                 myPlaneArraySize;
    int                 myPlaneBlack;
    int                 myPlaneWhite;
    int                 myPlaneUsePoints;
    int                 myDefaultBlack;
    int                 myDefaultWhite;

    // scoping stuff...
    int                 myCompScope;
    int                 myCompCount;
    char                myComp[PLANE_MAX_VECTOR_SIZE][256];
    int                 myArrayScope;
    int                 myArrayStart, myArrayEnd, myArrayStep;

    // error reporting.
    const char          *myError;
};




#endif

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