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// $Id$
#include "arg_shifter.h"
Arg_Shifter::Arg_Shifter (int &argc, char **argv, char **temp)
: argc_ (argc),
total_size_ (argc),
temp_ (temp),
argv_ (argv),
current_index_ (0),
back_ (argc - 1),
front_ (0)
{
// If not provided with one, allocate a temporary array.
if (this->temp_ == 0)
this->temp_ = new char *[this->total_size_];
if (this->temp_ != 0)
{
// Fill the temporary array.
this->argc_ = 0;
for (int i = 0; i < this->total_size_; i++)
{
this->temp_[i] = this->argv_[i];
this->argv_[i] = 0;
}
}
else
{
// Allocation failed, prohibit iteration.
this->current_index_ = this->argc_;
this->front_ = this->argc_;
}
}
Arg_Shifter::~Arg_Shifter (void)
{
// Delete the temporary vector.
delete [] temp_;
}
char *
Arg_Shifter::get_current (void) const
{
char *return_value = 0;
if (this->is_anything_left ())
return_value = this->temp_[current_index_];
return return_value;
}
int
Arg_Shifter::consume_arg (int number)
{
int return_value = 0;
// Stick knowns at the end of the vector (consumed).
if (this->is_anything_left() >= number)
{
for (int i = 0, j = this->back_ - (number - 1);
i < number;
i++, j++, this->current_index_++)
this->argv_[j] = this->temp_[this->current_index_];
this->back_ -= number;
return_value = 1;
}
return return_value;
}
int
Arg_Shifter::ignore_arg (int number)
{
int return_value = 0;
// Keep unknowns at the head of the vector.
if (this->is_anything_left () >= number)
{
for (int i = 0;
i < number;
i++, this->current_index_++, this->front_++)
this->argv_[this->front_] = this->temp_[this->current_index_];
return_value = 1;
this->argc_ += number;
}
return return_value;
}
int
Arg_Shifter::is_anything_left (void) const
{
return this->total_size_ - this->current_index_;
}
int
Arg_Shifter::is_option_next (void) const
{
return this->is_anything_left () &&
this->temp_[this->current_index_][0] == '-';
}
int
Arg_Shifter::is_parameter_next (void) const
{
return this->is_anything_left () &&
this->temp_[this->current_index_][0] != '-';
}
int
Arg_Shifter::num_ignored_args (void) const
{
return this->front_;
}
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