This commit is contained in:
Federico Ponchio 2008-05-29 12:50:41 +00:00
parent ca47599bd5
commit 21adae1895
2 changed files with 353 additions and 0 deletions

271
wrap/system/qgetopt.cpp Normal file
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#include <assert.h>
#include "qgetopt.h"
#include <iostream>
using namespace std;
GetOpt::GetOpt(int argc, char *argv[] ) {
appname = argv[0];
for(int i = 1; i < argc; i++)
args.push_back(argv[i]);
}
GetOpt::GetOpt(const QStringList &a): args(a) {
appname = a[0];
args = a;
args.pop_front();
}
//add an option without a value
void GetOpt::addSwitch(char s, const QString &name, const QString &description, bool *b ) {
Option option;
assert(!findOption(s, option));
assert(!findArg(name, option));
option.type = Option::SWITCH;
option.o = s;
option.name = name;
option.description = description;
option.b = b;
options.push_back(option);
}
//add a valued option (v will be left untouched if the option is not given)
void GetOpt::addOption(char s, const QString &name, const QString &description, QString *v ) {
Option option;
assert(!findOption(s, option));
assert(!findArg(name, option));
option.type = Option::OPTION;
option.o = s;
option.name = name;
option.description = description;
option.value = v;
options.push_back(option);
}
//add an argument
void GetOpt::addArgument(const QString &name, const QString &description, QString *v) {
Option option;
assert(!findArg(name, option));
option.type = Option::ARGUMENT;
option.name = name;
option.description = description;
option.value = v;
options.push_back(option);
}
//add an optional agrument
void GetOpt::addOptionalArgument(const QString &name, const QString &description, QString *v) {
Option option;
assert(!findArg(name, option));
option.type = Option::OPTIONAL;
option.name = name;
option.description = description;
option.value = v;
options.push_back(option);
}
//return application name
QString &GetOpt::applicationName() {
return appname;
}
//return usage string
QString GetOpt::usage() {
QString u = "Usage: " + appname;
//arguments
bool has_optionals = false;
bool has_options = false;
for(int i = 0; i < options.size(); i++) {
if(options[i].type == Option::OPTION) has_options = true;
if(options[i].type == Option::OPTIONAL) has_optionals = true;
if(options[i].type != Option::ARGUMENT) continue;
u += " <" + options[i].name + ">";
}
//optional arguments
if(has_optionals) {
u += " [";
for(int i = 0; i < options.size(); i++) {
if(options[i].type != Option::OPTIONAL) continue;
u += " <" + options[i].name + ">";
}
u += "]";
}
if(has_options) {
u += " [-";
for(int i = 0; i < options.size(); i++) {
if(options[i].type != Option::OPTION) continue;
u += options[i].o;
}
u += "]";
}
u += "\n\n";
//compute maxlen:
int maxlen = 0;
for(int i = 0; i < options.size(); i++) {
Option &o = options[i];
int len = o.name.size() + 2;
switch(o.type) {
case Option::ARGUMENT:
case Option::OPTIONAL: break;
case Option::SWITCH: len += 5; break;
case Option::OPTION: len += 16; break;
default: break;
}
if(len > maxlen) maxlen = len;
}
//print options and arguments in the given order
for(int i = 0; i < options.size(); i++) {
Option &o = options[i];
QString line = "";
switch(o.type) {
case Option::ARGUMENT:
case Option::OPTIONAL: line += o.name; break;
case Option::SWITCH: line += "-" + QString(o.o) + " --" + o.name; break;
case Option::OPTION: line += "-" + QString(o.o) + " <val> --" + o.name + "=<val>"; break;
default: break;
}
QString blank = "";
blank.resize(maxlen - line.size());
blank.fill(' ');
line += blank + formatDesc(o.description, maxlen) + "\n";
u += line;
}
return u;
}
void GetOpt::parse() {
QString error;
if(!parse(error)) {
cerr << qPrintable(error) << endl << endl << qPrintable(usage()) << endl << endl;
exit(0);
}
}
bool GetOpt::parse(QString &error) {
for(int i = 0; i < args.size(); i++) {
QString arg = args[i];
if(args[i] == "-h" || args[i] == "--help") {
cout << qPrintable(usage()) << endl << qPrintable(help) << endl;
exit(0);
}
//long option
if(arg.startsWith( QString::fromLatin1( "--" ) ) ) {
arg = arg.mid( 2 );
if(arg.isEmpty()) {
error = "'--' feature not supported, yet";
return false;
}
// split key=value style arguments
int equal = arg.indexOf( '=' );
QString val;
if(equal >= 0) {
arg = arg.left(equal);
val = arg.mid(equal + 1);
if(val.isEmpty()) {
error = "Emtpy value for option '--" + arg + "'";
return false;
}
}
if(arg.isEmpty()) {
error = "Option long name missing: '--=" + val + "' is not a valid option";
return false;
}
Option o;
if(!findArg(arg, o) || (o.type != Option::OPTION && o.type != Option::SWITCH)) {
error = "Unknown option: '--" + arg + "'";
return false;
}
*(o.value) = val;
//option
} else if( arg[0] == '-' ) {
if(arg.size() != 2) {
error = "Invalid option: " + arg;
return false;
}
Option o;
if(!findOption(arg[1].toAscii(), o)) {
error = "Unknown option: '" + arg + "'";
return false;
}
if(o.type == Option::SWITCH) {
*(o.b) = true;
} else { //OPTION
i++;
arg = args[i];
if(i == args.size() || arg[0] == '-') {
error = "Missing argument after option '" + arg + "'";
return false;
}
*(o.value) = arg;
}
//argument
} else {
arguments.push_back(arg);
}
}
//test arguments
for(int i = 0; i < options.size(); i++) {
Option &o = options[i];
if(o.type != Option::ARGUMENT) continue;
if(arguments.isEmpty()) {
error = "Too few arguments, could not parse argument '" + o.name + "'";
return false;
}
*(o.value) = arguments.front();
arguments.pop_front();
}
//test arguments
for(int i = 0; i < options.size(); i++) {
Option &o = options[i];
if(o.type != Option::ARGUMENT) continue;
if(arguments.isEmpty()) break;
*(o.value) = arguments.front();
arguments.pop_front();
}
if(!arguments.isEmpty() && !unlimitedArgs) {
error = "Too many arguments";
return false;
}
return true;
}
bool GetOpt::findOption(char c, Option &option) {
for(int i = 0; i < options.size(); i++) {
Option &o = options[i];
if(o.type != Option::OPTION && o.type != Option::SWITCH) continue;
if(o.o == c) {
option = o;
return true;
}
}
return false;
}
bool GetOpt::findArg(const QString &name, Option &option) {
for(int i = 0; i < options.size(); i++) {
Option &o = options[i];
if(o.name == name) {
option = o;
return true;
}
}
return false;
}
QString GetOpt::formatDesc(QString desc, int len) {
QString output;
//search for last space before 79 - len characters
while(!desc.isEmpty()) {
int pos = desc.lastIndexOf(" ", 79 - len);
if(pos == -1) {
output += desc;
break;
}
output += desc.left(pos) + "\n";
QString blank;
blank.resize(len);
blank.fill(' ');
output += blank;
desc = desc.mid(pos+1);
}
return output;
}

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wrap/system/qgetopt.h Normal file
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#ifndef GETOPT_H
#define GETOPT_H
#include <QString>
#include <QStringList>
#include <QMap>
/* Example usage:
QString file1, file2;
QString o_gamma = "10";
QString o_scale = "0.7";
GetOpt opt(argc, argv);
opt.addArgument("img1", "first image", &file1);
opt.addArgument("img2", "second image", &file2);
opt.addOption('g', "gamma", "weigth to derivatives of images (default: 10)", &o_gamma);
opt.addOption('s', "scale", "scale [0.5-0.99] for multiscale approach (default: 0.7)", &o_scale);
opt.parse(); */
class GetOpt {
protected:
struct Option {
enum Type { SWITCH, OPTION, ARGUMENT, OPTIONAL };
Type type;
char o;
QString name;
QString description;
QString *value;
bool *b;
};
bool unlimitedArgs;
QList<Option> options;
public:
QString appname; //application name
QString help; //help text
QStringList args; //original argument vector
QStringList arguments; //arbitrary long list of arguments are store here if unlimitedArgs is true
GetOpt(): unlimitedArgs(false) {}
GetOpt(int argc, char *argv[] );
GetOpt(const QStringList &a);
//add an option without a value
void addSwitch(char s, const QString &longname, const QString &description, bool *b );
//add a valued option (v will be left untouched if the option is not given)
void addOption(char s, const QString &longname, const QString &description, QString *v );
//add an argument
void addArgument(const QString &name, const QString &description, QString *v);
//add an optional agrument
void addOptionalArgument(const QString &name, const QString &description, QString *v);
//allow an unlimited number of optional arguments
void allowUnlimitedArguments(bool allow) {
unlimitedArgs = allow;
}
//set help if someone uses -h or --help option
void setHelp(QString &_help) { help = _help; }
void parse();
//return usage string
QString usage();
//return argv[0]
QString &applicationName();
protected:
//parses and return true on success
bool parse(QString &error);
//return options or switch
bool findOption(char c, Option &option);
//return any named argument
bool findArg(const QString &name, Option &option);
QString formatDesc(QString desc, int len);
};
#endif