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/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// ace
//
// = FILENAME
// ARGV.h
//
// = AUTHOR
// Doug Schmidt, Everett Anderson
//
// ============================================================================
#ifndef ACE_ARGUMENT_VECTOR_H
#define ACE_ARGUMENT_VECTOR_H
#include "ace/ACE.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Containers.h"
class ACE_Export ACE_ARGV
{
// = TITLE
// Transforms a string <buf> into an <argv> style vector of
// strings or an <argv> style vector of string <buf>, performing
// environment variable substitutions if necessary.
public:
// = Initialization and termination.
ACE_ARGV (const ASYS_TCHAR buf[],
int substitute_env_args = 1);
// Converts <buf> into an <argv>-style vector of strings. If
// <substitute_env_args> is enabled then we'll substitute the
// environment variables for each $ENV encountered in the string.
// The subscript and <argv> operations are not allowed on an
// ACE_ARGV created this way.
ACE_ARGV (ASYS_TCHAR *argv[],
int substitute_env_args = 1);
// Converts <argv> into a linear string. If <substitute_env_args>
// is enabled then we'll substitute the environment variables for
// each $ENV encountered in the string. The <buf> operation is not
// allowed on an ACE_ARGV created this way.
ACE_ARGV (ASYS_TCHAR *first_argv[],
ASYS_TCHAR *second_argv[],
int substitute_env_args =1);
// Creates an ACE_ARGV which is the concatenation of the first_argv
// and the second argv. The argv arguments should be null pointer
// terminated.
ACE_ARGV (int substitute_env_args = 1);
// Entry point for creating an ASYS_TCHAR *[] command line
// iteratively via the <add> method. When this constructor is used,
// the <ITERATIVE> state is enabled. The <argv> and <buf> methods
// are allowed, and the result is recreated when called multiple
// times. The subscript operator is not allowed.
~ACE_ARGV (void);
// Destructor.
// = Accessor arguments.
const ASYS_TCHAR *operator[] (size_t index);
// Returns the <index>th string in the ARGV array.
ASYS_TCHAR **argv (void);
// Returns the <argv> array. Caller should not delete this memory
// since the <ARGV> destructor will delete it. If the caller
// modifies the array in the iterative mode, the changes are not
// saved to the queue.
size_t argc (void) const;
// Returns <argc>.
const ASYS_TCHAR *buf (void);
// Returns the <buf>. Caller should not delete this memory since
// the <ARGV> destructor will delete it.
void dump (void) const;
// Dump the state of an object.
ACE_ALLOC_HOOK_DECLARE;
// Declare the dynamic allocation hooks.
int add (const ASYS_TCHAR *next_arg);
// Add another argument. This only works in the <ITERATIVE> state.
// Returns -1 on failure and 0 on success.
int add (ASYS_TCHAR *argv[]);
// Add another <argv> array. The <argv> parameter must be NULL
// terminated. This only works in the <ITERATIVE> state. Returns
// -1 on failure and 0 on success.
int state (void) const;
// What state is this ACE_ARGV in?
// These are the states possible via the different constructors.
enum States
{
TO_STRING = 1,
// ACE_ARGV converts buf[] to ASYS_TCHAR *argv[]
TO_PTR_ARRAY = 2,
// ACE_ARGV converts ASYS_TCHAR *argv[] to buf[]
ITERATIVE = 3
// Builds buf[] or ASYS_TCHAR *argv[] iteratively with <add>.
};
private:
int create_buf_from_queue (void);
// Creates buf_ from the queue, deletes previous buf_.
int string_to_argv (void);
// Converts buf_ into the ASYS_TCHAR *argv[] format.
int argv_to_string (ASYS_TCHAR **argv, ASYS_TCHAR *&buf);
// Returns the string created from argv in buf and
// returns the number of arguments.
int substitute_env_args_;
// Replace args with environment variable values?
int state_;
// Current state marker.
size_t argc_;
// Number of arguments in the ARGV array.
ASYS_TCHAR **argv_;
// The array of string arguments.
ASYS_TCHAR *buf_;
// Buffer containing the <argv> contents.
size_t length_;
// Total length of the arguments in the queue, not counting
// separating spaces
ACE_Unbounded_Queue<ASYS_TCHAR *> queue_;
// Queue which keeps user supplied arguments. This is only
// active in the "iterative" mode.
};
#if defined (__ACE_INLINE__)
#include "ace/ARGV.i"
#endif /* __ACE_INLINE__ */
#endif /* ACE_ARGUMENT_VECTOR_H */
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