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/* Copyright (C) 1999-2004 University of Oxford */
/* CCOPYRIGHT */
#include "options.h"
#include <fstream>
namespace Utilities {
using namespace std;
BaseOption * OptionParser::find_matching_option(const string& optstr)
{
for(Options::iterator o = options_.begin();
o != options_.end();
++o)
if((*o)->matches(optstr))
return *o;
return 0;
}
unsigned int OptionParser::parse_option(const string& optstr, const string& valstr,
char *argv[], int valpos, int argc)
throw(X_OptionError)
{
BaseOption * theOption = 0;
if((theOption = find_matching_option(optstr)) == 0)
throw X_OptionError(optstr, "Option doesn't exist");
if(theOption->unset() || (overWriteMode_==Allow))
{
if(theOption->has_arg()) {
if(valstr.length() > 0) {
if(theOption->set_value(valstr,argv,valpos,argc))
return 1 + theOption->nrequired();
else {
string errstr = "Couldn't set_value! valstr=\"" + valstr;
for (int nn=valpos+1; nn<=valpos + theOption->nrequired(); nn++) {
if (nn<argc) errstr += " " + string(argv[nn]);
}
throw X_OptionError(optstr, errstr + "\"");
}
} else if(!theOption->optional()) {
throw X_OptionError(optstr, "Missing non-optional argument");
}
}
if(theOption->optional())
theOption->use_default_value();
else
theOption->set_value(string());
return 1;
}
else
{
if( overWriteMode_!= Ignore)
throw X_OptionError(optstr, "Option already set");
else
return 1;
}
throw X_OptionError(optstr);
return 0;
}
unsigned int OptionParser::parse_long_option(const string& str)
{
string optstr(str);
string valstr;
string::size_type pos = 0;
if((pos = str.find("=", 0)) != string::npos) {
optstr = str.substr(0, pos);
valstr = str.substr(pos + 1, str.length() - pos + 1);
}
parse_option(optstr, valstr, 0,0,0);
return 1;
}
unsigned int OptionParser::parse_config_file(const string& filename)
{
ifstream cf(filename.c_str());
if(cf.fail())
throw X_OptionError(filename, "Couldn't open the file");
OverwriteMode oldMode=overWriteMode_;
overWriteMode_=Ignore;
string optstr; char buffer[1024];
while (cf >> optstr) {
if(optstr[0] == '#')
cf.getline(buffer, 1024); // Read and discard the rest of this line
else if(optstr.substr(0,2) == "--")
parse_long_option(optstr); // Parse a long option
else {
cf.getline(buffer, 1024);
parse_option(optstr, string(buffer), 0, 0, 0);
}
}
overWriteMode_=oldMode;
return 1;
}
unsigned int OptionParser::parse_command_line(unsigned int argc,
char **argv, int skip)
{
unsigned int optpos = 1 + skip;
unsigned int valpos = 1 + skip;
while(optpos < argc) {
unsigned int increments = 0;
string optstr(argv[optpos]), valstr;
if(optstr[0] != '-') // End of parsable options
break;
if(optstr[1] == '-') { // Parse a long opt
increments = parse_long_option(optstr);
optpos += increments;
} else {
valpos = optpos + 1;
for(unsigned int i = 1; i < optstr.length(); ++i)
{
string suboptstr = "-" + optstr.substr(i, 1);
if (valpos<argc) valstr=string(argv[valpos]); else valstr=string();
increments = parse_option(suboptstr, valstr, argv, valpos, argc);
valpos += increments - 1;
}
optpos = valpos;
}
}
return optpos; // User should process any remaining args
}
std::ostream& operator<<(std::ostream& os, const OptionParser p)
{
for(OptionParser::Options::const_iterator o = p.options_.begin();
o != p.options_.end(); ++o)
os << *(*o) << std::endl;
return os;
}
}
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