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/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// ace
//
// = FILENAME
// ARGV.h
//
// = AUTHOR
// Doug Schmidt, Everett Anderson
//
// ============================================================================
#if !defined (ACE_ARGUMENT_VECTOR_H)
#define ACE_ARGUMENT_VECTOR_H
#include "ace/ACE.h"
#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 char 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 (char *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 (int substitute_env_args = 1);
// Entry point for creating an char *[] command line iteratively
// via the add() method. The argv() and buf() method calls are
// allowed, and the result is recreated when called multiple times.
// The subscript operator is not allowed.
~ACE_ARGV (void);
// Destructor.
// = Accessor arguments.
const char *operator[] (size_t index);
// Returns the <index>th string in the ARGV array.
char **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 char *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 char *next_arg);
// Add another argument. This only works in the ITERATIVE state.
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 char *argv[]
TO_PTR_ARRAY = 2,
// ACE_ARGV converts char *argv[] to buf[]
ITERATIVE = 3
// Builds buf[] or char *argv[] iteratively with add()
};
private:
int create_buf_from_queue (void);
// Creates buf_ from the queue, deletes previous buf_.
void string_to_array (void);
// Converts buf_ into the char *argv[] format.
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.
char **argv_;
// The array of string arguments.
char *buf_;
// Buffer containing the <argv> contents.
size_t length_;
// Total length of the arguments in the queue, not counting
// separating spaces
ACE_Unbounded_Queue<char *> 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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