JackArgParser.cpp
/*
Copyright (C) 2006-2008 Grame
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "JackDriverLoader.h"
#include "JackArgParser.h"
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
using namespace std;
namespace Jack {
// class JackArgParser ***************************************************
JackArgParser::JackArgParser ( const char* arg )
{
jack_log ( "JackArgParser::JackArgParser, arg_string : '%s'", arg );
fArgc = 0;
//if empty string
if ( strlen(arg) == 0 )
return;
fArgString = string(arg);
//else parse the arg string
const size_t arg_len = fArgString.length();
unsigned int i = 0;
size_t pos = 0;
size_t start = 0;
size_t copy_start = 0;
size_t copy_length = 0;
//we need a 'space terminated' string
fArgString += " ";
//first fill a vector with args
do {
//find the first non-space character from the actual position
start = fArgString.find_first_not_of ( ' ', start );
//get the next quote or space position
pos = fArgString.find_first_of ( " \"" , start );
//no more quotes or spaces, consider the end of the string
if ( pos == string::npos )
pos = arg_len;
//if double quote
if ( fArgString[pos] == '\"' ) {
//first character : copy the substring
if ( pos == start ) {
copy_start = start + 1;
pos = fArgString.find ( '\"', ++pos );
copy_length = pos - copy_start;
start = pos + 1;
}
//else there is someting before the quote, first copy that
else {
copy_start = start;
copy_length = pos - copy_start;
start = pos;
}
}
//if space
if ( fArgString[pos] == ' ' ) {
//short option descriptor
if ( ( fArgString[start] == '-' ) && ( fArgString[start + 1] != '-' ) ) {
copy_start = start;
copy_length = 2;
start += copy_length;
}
//else copy all the space delimitated string
else {
copy_start = start;
copy_length = pos - copy_start;
start = pos + 1;
}
}
//then push the substring to the args vector
fArgv.push_back ( fArgString.substr ( copy_start, copy_length ) );
jack_log ( "JackArgParser::JackArgParser, add : '%s'", (*fArgv.rbegin()).c_str() );
} while ( start < arg_len );
//finally count the options
for ( i = 0; i < fArgv.size(); i++ )
if ( fArgv[i].at(0) == '-' )
fArgc++;
}
JackArgParser::~JackArgParser()
{}
string JackArgParser::GetArgString()
{
return fArgString;
}
int JackArgParser::GetNumArgv()
{
return fArgv.size();
}
int JackArgParser::GetArgc()
{
return fArgc;
}
int JackArgParser::GetArgv ( vector<string>& argv )
{
argv = fArgv;
return 0;
}
int JackArgParser::GetArgv ( char** argv )
{
//argv must be NULL
if ( argv )
return -1;
//else allocate and fill it
argv = (char**)calloc (fArgv.size(), sizeof(char*));
if (argv == NULL)
{
return -1;
}
for ( unsigned int i = 0; i < fArgv.size(); i++ )
{
argv[i] = (char*)calloc(fArgv[i].length(), sizeof(char));
fill_n ( argv[i], fArgv[i].length() + 1, 0 );
fArgv[i].copy ( argv[i], fArgv[i].length() );
}
return 0;
}
void JackArgParser::DeleteArgv ( const char** argv )
{
unsigned int i;
for ( i = 0; i < fArgv.size(); i++ )
free((void*)argv[i]);
free((void*)argv);
}
bool JackArgParser::ParseParams ( jack_driver_desc_t* desc, JSList** param_list )
{
string options_list;
unsigned long i = 0;
unsigned int param = 0;
size_t param_id = 0;
JSList* params = NULL;
jack_driver_param_t* intclient_param;
for ( i = 0; i < desc->nparams; i++ )
options_list += desc->params[i].character;
for ( param = 0; param < fArgv.size(); param++ )
{
if ( fArgv[param][0] == '-' )
{
//valid option
if ( ( param_id = options_list.find_first_of ( fArgv[param].at(1) ) ) != string::npos )
{
intclient_param = static_cast<jack_driver_param_t*> ( calloc ( 1, sizeof ( jack_driver_param_t) ) );
intclient_param->character = desc->params[param_id].character;
switch ( desc->params[param_id].type )
{
case JackDriverParamInt:
if (param + 1 < fArgv.size()) // something to parse
intclient_param->value.i = atoi ( fArgv[param + 1].c_str() );
break;
case JackDriverParamUInt:
if (param + 1 < fArgv.size()) // something to parse
intclient_param->value.ui = strtoul ( fArgv[param + 1].c_str(), NULL, 10 );
break;
case JackDriverParamChar:
if (param + 1 < fArgv.size()) // something to parse
intclient_param->value.c = fArgv[param + 1][0];
break;
case JackDriverParamString:
if (param + 1 < fArgv.size()) // something to parse
fArgv[param + 1].copy ( intclient_param->value.str, min(static_cast<int>(fArgv[param + 1].length()), JACK_DRIVER_PARAM_STRING_MAX) );
break;
case JackDriverParamBool:
intclient_param->value.i = true;
break;
}
//add to the list
params = jack_slist_append ( params, intclient_param );
}
//invalid option
else {
if (fArgv[param][1] == 'h') {
fprintf(stdout, "Internal client parameters:\n");
jack_print_driver_options (desc, stdout);
return false;
} else {
jack_error ( "Invalid option '%c'", fArgv[param][1] );
}
}
}
}
assert(param_list);
*param_list = params;
return true;
}
void JackArgParser::FreeParams ( JSList* param_list )
{
JSList *node_ptr = param_list;
JSList *next_node_ptr;
while (node_ptr) {
next_node_ptr = node_ptr->next;
free(node_ptr->data);
free(node_ptr);
node_ptr = next_node_ptr;
}
}
}
Jack
Definition: JackAC3Encoder.cpp:30
std
jack_error
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:92
jack_driver_desc_t::nparams
uint32_t nparams
Definition: driver_interface.h:137
jack_driver_param_desc_t::type
jack_driver_param_type_t type
Definition: driver_interface.h:116
jack_driver_param_t
Definition: driver_interface.h:125
_JSList
Definition: linux/alsa/jslist.h:35
jack_log
SERVER_EXPORT void jack_log(const char *fmt,...)
Definition: JackError.cpp:108
jack_driver_desc_t
Definition: driver_interface.h:132
jack_driver_desc_t::params
jack_driver_param_desc_t * params
Definition: driver_interface.h:138
jack_driver_param_desc_t::character
char character
Definition: driver_interface.h:115