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// Copyright (C) 2002, stephan@wanderinghorse.net
// Released under the GNU Lesser General Public License
#include <iostream>
#include <cstdlib>
#include <cstring>
#include "EStringTokenizer.h"
#include "ESimpleCLParser.h"
ESimpleCLParser::ESimpleCLParser ():EPropertyList ()
{
}
ESimpleCLParser::ESimpleCLParser (int argc, char *argv[], int startAt):
EPropertyList ()
{
setArgs (argc, argv, startAt);
}
ESimpleCLParser::~ESimpleCLParser ()
{
}
bool
ESimpleCLParser::isHelpSet()
{
return this->isSet( "help" ) || this->isSet( "-?" ) ;
}
void
ESimpleCLParser::setHelp (const std::string & key, const std::string & text)
{
this->helpmap.setString (key, text);
}
const std::string
ESimpleCLParser::getHelp (const std::string & key) const
{
std::string help = helpmap.getString (key);
return help;
}
std::string
ESimpleCLParser::getString (const std::string & key, const std::string & defaultVal) const
{
// DO NOT call LIBE_{DEBUG,VERBOSE} from here!
std::string check = EPropertyList::getString (key, defaultVal);
if (check != defaultVal)
return check;
if (key.find ("-") != 0) // non-dashed argument
{
// now try -key, --key
check = key;
std::string foo;
for (int i = 0; i < 2; i++)
{
check.insert (check.begin (), '-');
foo = EPropertyList::getString (check,
defaultVal);
//CERR << "dash test: " << check << " = " << foo << endl;
if (foo != defaultVal)
return foo;
}
}
return defaultVal;
}
int
ESimpleCLParser::setArgs (int argc, char *argv[], int startAt,
const char *argpre)
{
using namespace std;
if (startAt >= argc)
return -1;
if (!argv[startAt])
return -1;
std::string argprefix = argpre ? argpre : "-";
int acount = 0;
std::string v;
std::string a;
EKeyValueParser kvp;
std::string nextarg;
string numbers = "0123456789";
bool skipnext = false;
for (int i = startAt; i < argc; i++)
{
if (skipnext)
{
skipnext = false;
continue;
}
a = std::string ((const char *) argv[i]);
//CERR << "arg="<<a<<endl;
if (a.find (argprefix) != 0)
{
continue;
}
// if( a.find_first_of( numbers ) == 1 )
// { // negative number?
// CERR << "setArgs() skipping possible negative number arg: "<<a<<endl;
// continue;
// }
v = std::string ();
++acount;
if (kvp.parse (a)) // check for: --foo=bar
{
a = kvp.key ();
v = kvp.value ();
}
else // else it's space-separated or a boolean flag
{
if (i < argc - 1)
{
nextarg = std::string (argv[i + 1]);
if (nextarg.find (argprefix) == 0)
{
if (nextarg.find_first_of (numbers) ==
1)
{ // let's assume it's a negative number, not a flag
// todo: actual atol() or atod() check
skipnext = true;
v = nextarg;
}
else
{ // nextarg is argprefix'd, so treat this as a boolean flag
v = "true";
}
}
else
{ // it was space-separated: --foo bar
v = nextarg;
skipnext = true;
}
}
else
{
v = "true"; // the final item is an argument, toggling it to true.
}
}
this->set (a, v);
//CERR << "["<<a<<"] = ["<<v<<"]"<<endl;
}
return acount;
}
int
ESimpleCLParser::setArgs (std::string args, std::string separators)
{
// if( args.empty() || args.find( "#" ) == 0 ) return 0; // arguable
if (args.empty ())
return 0;
EStringTokenizer toker;
const static int maxargs = 256;
char *cargs[maxargs]; // max number of arguments. This size is completely arbitrary.
int count = 0;
toker.tokenize (args.c_str (), separators.c_str ());
int argbufsize = 1024;
while (toker.hasMoreTokens () && count < maxargs)
{
cargs[count] = (char *) malloc (argbufsize); // if this isn't enough... there's a problem.
strncpy (cargs[count], toker.nextToken (), argbufsize);
// CERR << "parse(): token= [" << cargs[count] << "]" << endl;
++count;
}
int ret = count ? this->setArgs (count, cargs, 0, 0) : 0;
for (int i = 0; i < count; i++)
free (cargs[i]);
return ret;
}
const std::string
ESimpleCLParser::dumpHelp (bool scv /* show current values? */ ) const
{
EPropertyList::const_iterator iter = this->helpmap.begin ();
std::string outs;
std::string key, val, realkey;
// outs += "==========Format:\noption_name:";
// if( scv ) outs += " [current value]";
// outs += "\n\thelp text for option.\n==========\n";
while (iter != this->helpmap.end ())
{
key = (*iter).first;
outs += key;
outs += ':';
if (scv)
{
val = this->getString (key); // handles dashes
if (!val.empty ())
{
outs += " [";
outs += val;
outs += "]";
}
}
outs += "\n\t";
outs += this->getHelp (key);
outs += '\n';
++iter;
}
outs += "\nAll arguments must start with either - or --, like -help or --help, when passed in from the command line.";
return outs;
}
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