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/* -*- c++ -*- */
// ============================================================================
//
// = LIBRARY
// TAO IDL
//
// = FILENAME
// be_helper.h
//
// = DESCRIPTION
// Defines the abstract class for outputting the C++ mapping. This is a
// helper class to the singleton TAO_CodeGen class
//
// = AUTHOR
// Aniruddha Gokhale
//
// ============================================================================
#if !defined (TAO_BE_OUTSTRM_H)
#define TAO_BE_OUTSTRM_H
// a dummy structure to inform TAO_OutStream's << operator to put a newline
// and use the current indentation for the succeeding line
struct TAO_NL
{
public:
TAO_NL (void);
};
class TAO_OutStream
{
// =TITLE
// TAO_OutStream
// =DESCRIPTION
// Defines an interface by which the backend code generator can print its
// output to the underlying I/O handle. This is a helper class that will be
// used by the TAO_CodeGen class. However, this is an abstract class and
// classes that understand specific front ends must derive from this
// class.
public:
// Enumerated type to indicate the stream type
enum STREAM_TYPE
{
TAO_CLI_HDR,
TAO_CLI_INL,
TAO_CLI_IMPL,
TAO_SVR_HDR,
TAO_SVR_INL,
TAO_SVR_IMPL
};
TAO_OutStream (void);
// constructor.
virtual ~TAO_OutStream (void);
// destructor
int open (const char *fname, TAO_OutStream::STREAM_TYPE st=TAO_OutStream::TAO_CLI_HDR);
// open the underlying low-level handle for output
void stream_type (TAO_OutStream::STREAM_TYPE);
// set the stream type
TAO_OutStream::STREAM_TYPE stream_type (void);
// return the stream type
int incr_indent (unsigned short flag=1);
// increment the indentation level and by default actually indent the output
// accordingly
int decr_indent (unsigned short flag=1);
// decrease the indentation level and by default actually indent the output
// accordingly
int reset (void);
// reset indentation level to 0
int indent (void);
// indent starting next line
int nl (void);
// put a newline and indent on the next line
int print (const char *format, ...);
// "printf" style variable argument print
int gen_ifdef_macro (const char *flatname, const char *suffix=0);
// generate a #if !defined, #defined macro
int gen_endif (void);
// generate an endif statement
// =overloaded operators
TAO_OutStream &operator<< (const char *str);
// output the char string and return a reference to ourselves
TAO_OutStream &operator<< (const long num);
// output the integer and return a reference to ourselves
TAO_OutStream &operator<< (const TAO_NL nl);
// The following will be provided by specialized classes
TAO_OutStream &operator<< (Identifier *id);
// output an Identifier node
TAO_OutStream &operator<< (UTL_IdList *idl);
// output a scoped name
TAO_OutStream &operator<< (AST_Expression *expr);
// output an AST_Expression node
// provided by specialized classes
virtual TAO_OutStream &print (Identifier *id) = 0;
virtual TAO_OutStream &print (UTL_IdList *idl) = 0;
virtual TAO_OutStream &print (AST_Expression *idl) = 0;
protected:
FILE *fp_;
// the underlying low-level I/O handle
TAO_OutStream::STREAM_TYPE st_;
// stream type
int indent_level_;
// indentation level
};
#endif // if !defined
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