ETCL_Interpreter Class Reference

ETCL_Interpreter is the superclass for all ETCL interpreters. Its build tree method invokes the yacc parser to parse a constraint or preference string. More...

#include <ETCL_Interpreter.h>

Collaboration diagram for ETCL_Interpreter:

List of all members.

Protected Member Functions
	ETCL_Interpreter (void)
	Constructor.
virtual	~ETCL_Interpreter (void)
	Destructor.
int	build_tree (const char *constraints)
Static Protected Member Functions
static int	is_empty_string (const char *str)
Protected Attributes
ETCL_Constraint *	root_
Static Private Attributes
static ACE_SYNCH_MUTEX	parserMutex__
	This mutex protects the <build_tree> method from reentrance.

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Detailed Description

ETCL_Interpreter is the superclass for all ETCL interpreters. Its build tree method invokes the yacc parser to parse a constraint or preference string.

Definition at line 45 of file ETCL_Interpreter.h.

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Constructor & Destructor Documentation

ETCL_Interpreter::ETCL_Interpreter

(

void

)

[protected]

Constructor.

Definition at line 14 of file ETCL_Interpreter.cpp.

  : root_ (0)
{
}

ETCL_Interpreter::~ETCL_Interpreter

(

void

)

[protected, virtual]

Destructor.

Definition at line 19 of file ETCL_Interpreter.cpp.

{
  delete this->root_;
}

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Member Function Documentation

int ETCL_Interpreter::build_tree

(

const char *

constraints

)

[protected]

Using the Yacc generated parser, construct an expression tree representing constraints from the tokens returned by it.

Definition at line 25 of file ETCL_Interpreter.cpp.

{
  ACE_GUARD_RETURN (ACE_SYNCH_MUTEX,
                    guard,
                    ETCL_Interpreter::parserMutex__,
                    -1);

  Lex_String_Input::reset ((char*)constraints);

  yyval.constraint = 0;
  int return_value = ::yyparse ();

  if (return_value == 0 && yyval.constraint != 0)
    {
      this->root_ = yyval.constraint;
    }
  else
    {
      this->root_ = 0;
    }

  return return_value;
}

int ETCL_Interpreter::is_empty_string

(

const char *

str

)

[static, protected]

Definition at line 50 of file ETCL_Interpreter.cpp.

{
  int return_value = 0;

  if (str != 0)
    {
      int i = 0;

      while (str[i] != '\0')
        {
          if (str[i] != ' ')
            {
              break;
            }

          ++i;
        }

      if (str[i] == '\0')
        {
          return_value = 1;
        }
    }

  return return_value;
}

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Member Data Documentation

ETCL_Parser_Export ACE_SYNCH_MUTEX ETCL_Interpreter::parserMutex__ [static, private]

This mutex protects the <build_tree> method from reentrance.

Definition at line 66 of file ETCL_Interpreter.h.

ETCL_Constraint* ETCL_Interpreter::root_ [protected]

The root of the expression tree, not equal to null if build_tree successfully builds a tree from the constraints.

Definition at line 63 of file ETCL_Interpreter.h.

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The documentation for this class was generated from the following files:

• ETCL_Interpreter.h
• ETCL_Interpreter.cpp