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/**
* @file argparser.cc
* @brief Implementation of the command line argument parser
* @author Andreas Aardal Hanssen
* @date 2005
*/
#include "argparser.h"
#include "convert.h"
#include <map>
#include <string>
using namespace Binc;
using std::string;
CommandLineArgs::CommandLineArgs()
{
errString = "Unknown error for args";
ac = 0;
}
bool CommandLineArgs::parse(int argc, char *argv[])
{
ac = -1;
head = argv[0];
head += " <options> --\n";
if (argc > 1) {
string lastKey;
bool lastIsBoolean = false;
for (int i = 1; i < argc; ++i) {
string s = argv[i];
if (s.length() < 2) {
unqualified.push_back(s);
continue;
}
if (s[0] != '-') {
// read value of last argument
if (lastKey == "") {
unqualified.push_back(s);
continue;
}
if (lastIsBoolean && (s != "yes" && s != "no")) {
errString = "syntax error: " + s;
errString += " (expected yes or no)";
return false;
}
args[lastKey] = s;
passedArgs[lastKey] = true;
lastKey = "";
lastIsBoolean = false;
} else if (s[1] == '-') {
if (lastKey != "") {
if (lastIsBoolean) {
args[lastKey] = "yes";
passedArgs[lastKey] = true;
lastKey = "";
lastIsBoolean = false;
} else {
errString = "expected value of ";
errString += lastKey;
return false;
}
}
// break if '--' is detected
if (s.length() == 2) {
ac = i + 1;
break;
}
// parse --argument
string arg = s.substr(2);
string val;
auto epos = arg.find('=');
if (epos != string::npos) {
val = arg.substr(epos + 1);
arg = arg.substr(0, epos);
}
if (reg.find(arg) == reg.end()) {
errString = "unrecognized argument: --" + arg;
return false;
}
if (reg.find(arg)->second.b) {
if (val != "" && val != "yes" && val != "no") {
errString = "syntax error: " + val;
errString += " (expected yes or no)";
return false;
} else if (val == "") {
val = "yes";
}
}
if (val == "") {
errString = "syntax error: " + arg;
errString += " (expected --" + arg + "=<str>)";
return false;
}
args[arg] = val;
passedArgs[arg] = true;
lastKey = "";
lastIsBoolean = false;
} else {
if (lastKey != "") {
if (lastIsBoolean) {
args[lastKey] = "yes";
passedArgs[lastKey] = true;
lastKey = "";
lastIsBoolean = false;
} else {
errString = "expected value of ";
errString += lastKey;
return false;
}
}
// parse -argument
string arg = s.substr(1);
if (arg.length() == 1) {
bool match = false;
for (const auto &[first, second] : reg) {
if (second.c.find(arg[0]) != string::npos) {
lastKey = first;
if (second.b) lastIsBoolean = true;
match = true;
break;
}
}
if (!match) {
errString = "unrecognized argument: -";
errString += arg[0];
return false;
}
} else {
for (auto its : arg) {
bool match = false;
for (const auto &[first, second] : reg) {
if (second.c.find(its) != string::npos) {
if (!second.b) {
errString = "argument is not a boolean: ";
errString += "--" + first;
errString += " / -";
errString += second.c;
return false;
}
match = true;
args[first] = "yes";
passedArgs[first] = true;
lastKey = "";
lastIsBoolean = false;
break;
}
}
if (!match) {
errString = "unrecognized argument: ";
errString += s;
return false;
}
}
}
}
}
if (lastKey != "") {
if (lastIsBoolean) {
args[lastKey] = "yes";
passedArgs[lastKey] = true;
} else {
errString = "expected value of ";
errString += lastKey;
return false;
}
}
}
// assign default "no" values for arguments that were not passed.
for (const auto &[first, second] : reg) {
if (args.find(first) == args.end()) {
if (!second.o) {
errString = "missing argument: ";
errString += first;
return false;
}
if (second.b) args[first] = "no";
}
}
if (ac == -1) ac = argc;
return true;
}
string CommandLineArgs::errorString(void) const
{
return errString;
}
const string CommandLineArgs::operator[](const string &arg) const
{
if (args.find(arg) == args.end()) return "";
return args.find(arg)->second;
}
void CommandLineArgs::addOptional(const string &arg, const string &desc, bool boolean)
{
registerArg(arg, desc, boolean, true);
}
void CommandLineArgs::addRequired(const string &arg, const string &desc, bool boolean)
{
registerArg(arg, desc, boolean, false);
}
void CommandLineArgs::registerArg(const string &arg, const string &desc, bool boolean, bool optional)
{
string name = arg;
string shorts;
while (name.size() > 1 && name[1] == '|') {
shorts += name[0];
name = name.substr(2);
}
reg.insert(make_pair(name, ArgOpts(shorts, boolean, optional, desc)));
}
bool CommandLineArgs::hasArg(const string &arg) const
{
string tmp = arg;
lowercase(tmp);
return passedArgs.find(tmp) != passedArgs.end();
}
string CommandLineArgs::usageString(void) const
{
string tmp = head;
tmp += '\n';
for (const auto &[first, second] : reg) {
if (!second.c.empty()) {
for (auto sit = second.c.cbegin(); sit != second.c.cend(); ++sit) {
if (sit != second.c.begin()) tmp += '\n';
tmp += " -";
tmp += *sit;
}
tmp += ", ";
} else {
tmp += " ";
}
tmp += "--" + first;
if (!second.b) tmp += "=<str>";
if (!second.o) tmp += " (required)";
auto lineStart = tmp.rfind('\n');
if (lineStart == string::npos) lineStart = 0;
int pad = 21 - (tmp.length() - lineStart);
if (pad < 0) {
tmp += '\n';
pad = 20;
}
tmp += string(pad, ' ') + second.desc + '\n';
}
tmp += '\n' + tail + '\n';
return tmp;
}
int CommandLineArgs::argc(void) const
{
return ac;
}
void CommandLineArgs::setTail(const string &str)
{
tail = str;
}
const std::vector<string> &CommandLineArgs::getUnqualifiedArgs() const
{
return unqualified;
}
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