ParseTarget.hpp

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/******************************************************************************/
/* REXX Kernel                                                ParseTarget.hpp */
/*                                                                            */
/* Primitive PARSE instruction parsing target Class Definitions               */
/*                                                                            */
/******************************************************************************/
#ifndef Included_RexxInstructionTarget
#define Included_RexxInstructionTarget
 
#define PARSE_UPPER     1              /* Uppercase parsed string           */
#define PARSE_LOWER     2              /* Lowercase parsed string           */
#define PARSE_CASELESS  1              /* do case insensitive searches      */
 
class RexxTarget {
 public:
  inline void *operator new(size_t size, void *ptr) {return ptr;};
  inline RexxTarget() { ; }
  inline RexxTarget (RESTORETYPE restoreType) { ; };
  void        init (RexxObject *, RexxObject **, size_t, size_t, bool, RexxActivation *, RexxExpressionStack *);
  void        next(RexxActivation *);
  void        moveToEnd();
  void        forward(stringsize_t);
  void        forwardLength(stringsize_t);
  void        absolute(stringsize_t);
  void        backward(stringsize_t);
  void        backwardLength(stringsize_t);
  void        search(RexxString *);
  void        caselessSearch(RexxString *);
  RexxString *getWord();
  RexxString *remainder();
  void        skipRemainder() { this->subcurrent = this->end;      /* eat the remainder piece           */ }
  void        skipWord();
 
  RexxString * string;                 /* parsed string                     */
  RexxObject **arglist;                /* argument list for PARSE ARG       */
  RexxExpressionStack *stack;          // context expression stack (used for anchoring values for GC).
  size_t  stackTop;                    // top location of the epxression stack
  size_t  argcount;
  stringsize_t  start;                 /* start of substring                */
  stringsize_t  end;                   /* end of the substring              */
  stringsize_t  string_length;         /* length of the string              */
  stringsize_t  pattern_end;           /* end of matched pattern            */
  stringsize_t  pattern_start;         /* start of matched pattern          */
  stringsize_t  subcurrent;            /* current location for word parse   */
  size_t  next_argument;               /* next PARSE ARG argument           */
  size_t  translate;                   /* string translation flag           */
};
#endif