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SPAbase Class input_callback

SPAbase.toolkit_callback
  |
  +---input_callback

Usage: you can derive this class.

public class input_callback

Creates the standard input for ACIS.

Role: The input_callback implements standard input for ACIS. Any time a standard C input call is made within ACIS, that call is redirected through this callback class. At that point the platform specific implementation of input_callback obtains the input from its natural input stream.

Constructor and Destructor Index

o input_callback(FILE*): C++ initialize constructor requests memory for this object and populates it with the data supplied as arguments.
o ~input_callback(): Destroys this callback.

Method Index

o do_clearerr(): Clears the end of file and error indicators.
o do_feof(): Returns a non-zero if end of file reached.
o do_ferror(): Returns a non-zero if an error has occurred.
o do_getc(): Gets input character from input stream.
o do_ungetc(int): Pushes character back onto input stream.

o fp: The file pointer to which this callback relates

Constructor and Destructor

o input_callback

public input_callback( FILE* in_fp)

C++ initialize constructor requests memory for this object and populates it with the data supplied as arguments.

Parameters:

in_fp: file pointer.

o ~input_callback

protected virtual ~input_callback(

)

Destroys this callback.

Methods

o do_clearerr

public virtual void do_clearerr(

)

Clears the end of file and error indicators.

o do_feof

public virtual int do_feof(

)

Returns a non-zero if end of file reached.

o do_ferror

public virtual int do_ferror(

)

Returns a non-zero if an error has occurred.

Role: Clears end of file and error indicators.

o do_getc

public virtual int do_getc(

)

Gets input character from input stream.

o do_ungetc

public virtual int do_ungetc( int c)

Pushes character back onto input stream.

Parameters:

c: character to push back.

Data Members

o fp

  protected FILE *fp

The file pointer to which this callback relates