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#include "ace/Arg_Shifter.h"
#include "ace/OS_String.h"
#include "ace/OS_Errno.h"
ACE_RCSID (ace,
Arg_Shifter,
"$Id$")
ACE_Arg_Shifter::ACE_Arg_Shifter (int& argc,
const ACE_TCHAR** argv,
const ACE_TCHAR** temp)
: argc_ (argc),
total_size_ (argc),
temp_ (temp),
argv_ (argv),
current_index_ (0),
back_ (argc - 1),
front_ (0)
{
this->init ();
}
ACE_Arg_Shifter::ACE_Arg_Shifter (int& argc,
ACE_TCHAR** argv,
ACE_TCHAR** temp)
: argc_ (argc),
total_size_ (argc),
temp_ ((const ACE_TCHAR **) temp),
argv_ ((const ACE_TCHAR **) argv),
current_index_ (0),
back_ (argc - 1),
front_ (0)
{
this->init ();
}
void
ACE_Arg_Shifter::init (void)
{
// If not provided with one, allocate a temporary array.
if (this->temp_ == 0)
ACE_NEW (this->temp_,
const ACE_TCHAR *[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_;
}
}
ACE_Arg_Shifter::~ACE_Arg_Shifter (void)
{
// Delete the temporary vector.
delete [] temp_;
}
const ACE_TCHAR *
ACE_Arg_Shifter::get_current (void) const
{
const ACE_TCHAR * retval = 0;
if (this->is_anything_left ())
retval = this->temp_[current_index_];
return retval;
}
const ACE_TCHAR *
ACE_Arg_Shifter::get_the_parameter (const ACE_TCHAR *flag)
{
// the return 0's abound because this method
// would otherwise be a deep if { } else { }
// check to see if any arguments still exist
if (!this->is_anything_left())
return 0;
// check to see if the flag is the argument
int offset = this->cur_arg_strncasecmp (flag);
if (offset == -1)
return 0;
if (offset == 0)
{
this->consume_arg ();
if (!this->is_parameter_next())
{
return 0;
}
}
// the paramter is in the middle somewhere...
return this->temp_[current_index_] + offset;
}
int
ACE_Arg_Shifter::cur_arg_strncasecmp (const ACE_TCHAR *flag)
{
// Check for a current argument
if (this->is_anything_left())
{
unsigned int flag_length = ACE_OS_String::strlen (flag);
// Check for presence of the flag
if (ACE_OS_String::strncasecmp(this->temp_[current_index_],
flag,
flag_length) == 0)
{
if (ACE_OS_String::strlen(temp_[current_index_]) ==
flag_length)
{
// match and lengths are equal
return 0;
}
else
{
// matches, with more info to boot!
return ACE_OS_String::strspn
(this->temp_[current_index_] + flag_length,
ACE_LIB_TEXT (" ")) + flag_length;
}
}
}
// failure
return -1;
}
int
ACE_Arg_Shifter::consume_arg (int number)
{
int retval = 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;
retval = 1;
}
return retval;
}
int
ACE_Arg_Shifter::ignore_arg (int number)
{
int retval = 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_];
retval = 1;
this->argc_ += number;
}
return retval;
}
int
ACE_Arg_Shifter::is_anything_left (void) const
{
return this->total_size_ - this->current_index_;
}
int
ACE_Arg_Shifter::is_option_next (void) const
{
return this->is_anything_left () &&
this->temp_[this->current_index_][0] == '-';
}
int
ACE_Arg_Shifter::is_parameter_next (void) const
{
return this->is_anything_left ()
&& this->temp_[this->current_index_][0] != '-';
}
int
ACE_Arg_Shifter::num_ignored_args (void) const
{
return this->front_;
}
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