configuration.cpp
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	/*
	configuration.cpp - wraps gpgme configuration components
	Copyright (C) 2010 Klarälvdalens Datakonsult AB

	This file is part of GPGME++.

	GPGME++ is free software; you can redistribute it and/or
	modify it under the terms of the GNU Library General Public
	License as published by the Free Software Foundation; either
	version 2 of the License, or (at your option) any later version.

	GPGME++ 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 Library General Public License for more details.

	You should have received a copy of the GNU Library General Public License
	along with GPGME++; see the file COPYING.LIB. If not, write to the
	Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	Boston, MA 02110-1301, USA.
	*/

	#include "configuration.h"
	#include "error.h"
	#include "util.h"

	#include <gpgme.h>

	#include <iterator>
	#include <algorithm>
	#include <ostream>
	#include <cstring>
	#include <assert.h>

	using namespace GpgME;
	using namespace GpgME::Configuration;

	typedef std::shared_ptr< std::remove_pointer<gpgme_conf_opt_t>::type > shared_gpgme_conf_opt_t;
	typedef std::weak_ptr< std::remove_pointer<gpgme_conf_opt_t>::type > weak_gpgme_conf_opt_t;

	typedef std::shared_ptr< std::remove_pointer<gpgme_conf_arg_t>::type > shared_gpgme_conf_arg_t;
	typedef std::weak_ptr< std::remove_pointer<gpgme_conf_arg_t>::type > weak_gpgme_conf_arg_t;

	typedef std::shared_ptr< std::remove_pointer<gpgme_ctx_t>::type > shared_gpgme_ctx_t;
	typedef std::weak_ptr< std::remove_pointer<gpgme_ctx_t>::type > weak_gpgme_ctx_t;

	namespace
	{
	struct nodelete {
	template <typename T> void operator()(T *) {}
	};
	}

	// static
	std::vector<Component> Component::load(Error &returnedError)
	{

	//
	// 1. get a context:
	//
	gpgme_ctx_t ctx_native = 0;
	if (const gpgme_error_t err = gpgme_new(&ctx_native)) {
	returnedError = Error(err);
	return std::vector<Component>();
	}
	const shared_gpgme_ctx_t ctx(ctx_native, &gpgme_release);

	//
	// 2. load the config:
	//
	gpgme_conf_comp_t conf_list_native = 0;
	if (const gpgme_error_t err = gpgme_op_conf_load(ctx_native, &conf_list_native)) {
	returnedError = Error(err);
	return std::vector<Component>();
	}
	shared_gpgme_conf_comp_t head(conf_list_native, &gpgme_conf_release);

	//
	// 3. convert to vector<Component>:
	//
	std::vector<Component> result;

	while (head) {
	// secure 'head->next' (if any) against memleaks:
	shared_gpgme_conf_comp_t next;
	if (head->next) {
	next.reset(head->next, &gpgme_conf_release);
	}

	// now prevent double-free of next.get() and following:
	head->next = 0;

	// now add a new Component to 'result' (may throw):
	result.resize(result.size() + 1);
	result.back().comp.swap(head); // .comp = std::move( head );
	head.swap(next); // head = std::move( next );
	}

	return result;
	}

	Error Component::save() const
	{

	if (isNull()) {
	return Error(make_error(GPG_ERR_INV_ARG));
	}

	//
	// 1. get a context:
	//
	gpgme_ctx_t ctx_native = 0;
	if (const gpgme_error_t err = gpgme_new(&ctx_native)) {
	return Error(err);
	}
	const shared_gpgme_ctx_t ctx(ctx_native, &gpgme_release);

	//
	// 2. save the config:
	//
	return Error(gpgme_op_conf_save(ctx.get(), comp.get()));
	}

	const char *Component::name() const
	{
	return comp ? comp->name : 0 ;
	}

	const char *Component::description() const
	{
	return comp ? comp->description : 0 ;
	}

	const char *Component::programName() const
	{
	return comp ? comp->program_name : 0 ;
	}

	Option Component::option(unsigned int idx) const
	{
	gpgme_conf_opt_t opt = 0;
	if (comp) {
	opt = comp->options;
	}
	while (opt && idx) {
	opt = opt->next;
	--idx;
	}
	if (opt) {
	return Option(comp, opt);
	}
	return Option();
	}

	Option Component::option(const char *name) const
	{
	gpgme_conf_opt_t opt = 0;
	if (comp) {
	opt = comp->options;
	}
	using namespace std; // for strcmp
	while (opt && strcmp(name, opt->name) != 0) {
	opt = opt->next;
	}
	if (opt) {
	return Option(comp, opt);
	}
	return Option();
	}

	unsigned int Component::numOptions() const
	{
	unsigned int result = 0;
	for (gpgme_conf_opt_t opt = comp ? comp->options : 0 ; opt ; opt = opt->next) {
	++result;
	}
	return result;
	}

	std::vector<Option> Component::options() const
	{
	std::vector<Option> result;
	for (gpgme_conf_opt_t opt = comp ? comp->options : 0 ; opt ; opt = opt->next) {
	result.push_back(Option(comp, opt));
	}
	return result;
	}

	static gpgme_conf_arg_t mygpgme_conf_arg_copy(gpgme_conf_arg_t other, gpgme_conf_type_t type)
	{
	gpgme_conf_arg_t result = 0, last = 0;
	for (gpgme_conf_arg_t a = other ; a ; a = a->next) {
	gpgme_conf_arg_t arg = 0;
	const gpgme_error_t err
	= gpgme_conf_arg_new(&arg, type,
	a->no_arg ? 0 :
	type == GPGME_CONF_STRING ? a->value.string :
	/* else / static_cast<void >(&a->value));
	if (err) {
	gpgme_conf_arg_release(result, type);
	return 0;
	}
	assert(arg);
	if (result) {
	last->next = arg;
	} else {
	result = arg;
	}
	last = arg;
	}
	return result;
	}

	Component Option::parent() const
	{
	return Component(comp.lock());
	}

	unsigned int Option::flags() const
	{
	return isNull() ? 0 : opt->flags;
	}

	Level Option::level() const
	{
	return isNull() ? Internal : static_cast<Level>(opt->level) ;
	}

	const char *Option::name() const
	{
	return isNull() ? 0 : opt->name ;
	}

	const char *Option::description() const
	{
	return isNull() ? 0 : opt->description ;
	}

	const char *Option::argumentName() const
	{
	return isNull() ? 0 : opt->argname ;
	}

	Type Option::type() const
	{
	return isNull() ? NoType : static_cast<Type>(opt->type) ;
	}

	Type Option::alternateType() const
	{
	return isNull() ? NoType : static_cast<Type>(opt->alt_type) ;
	}

	#if 0
	static Option::Variant argument_to_variant(gpgme_conf_type_t type, bool list, gpgme_conf_arg_t arg)
	{
	assert(arg);
	switch (type) {
	case GPGME_CONF_NONE:
	if (list) {
	// return the count (number of times set):
	return arg->value.count;
	} else {
	return none;
	}
	case GPGME_CONF_INT32:
	if (list) {
	std::vector<int> result;
	for (gpgme_conf_arg_t a = arg ; a ; a = a->next) {
	result.push_back(a->value.int32);
	}
	return result;
	} else {
	return arg->value.int32;
	}
	case GPGME_CONF_UINT32:
	if (list) {
	std::vector<unsigned int> result;
	for (gpgme_conf_arg_t a = arg ; a ; a = a->next) {
	result.push_back(a->value.uint32);
	}
	return result;
	} else {
	return arg->value.uint32;
	}
	case GPGME_CONF_FILENAME:
	case GPGME_CONF_LDAP_SERVER:
	case GPGME_CONF_KEY_FPR:
	case GPGME_CONF_PUB_KEY:
	case GPGME_CONF_SEC_KEY:
	case GPGME_CONF_ALIAS_LIST:
	// these should not happen in alt_type, but fall through
	case GPGME_CONF_STRING:
	if (list) {
	std::vector<const char *> result;
	for (gpgme_conf_arg_t a = arg ; a ; a = a->next) {
	result.push_back(a->value.string);
	}
	return result;
	} else {
	return arg->value.string;
	}
	}
	assert(!"Option: unknown alt_type!");
	return Option::Variant();
	}

	namespace
	{
	inline const void to_void_star(const char s)
	{
	return s;
	}
	inline const void *to_void_star(const std::string &s)
	{
	return s.c_str();
	}
	inline const void *to_void_star(const int &i)
	{
	return &i; // const-&: sic!
	}
	inline const void *to_void_star(const unsigned int &i)
	{
	return &i; // const-&: sic!
	}

	struct VariantToArgumentVisitor : boost::static_visitor<gpgme_conf_arg_t> {
	static gpgme_conf_arg_t make_argument(gpgme_conf_type_t type, const void *value)
	{
	gpgme_conf_arg_t arg = 0;
	#ifdef HAVE_GPGME_CONF_ARG_NEW_WITH_CONST_VALUE
	if (const gpgme_error_t err = gpgme_conf_arg_new(&arg, type, value)) {
	return 0;
	}
	#else
	if (const gpgme_error_t err = gpgme_conf_arg_new(&arg, type, const_cast<void *>(value))) {
	return 0;
	}
	#endif
	else {
	return arg;
	}
	}

	gpgme_conf_arg_t operator()(bool v) const
	{
	return v ? make_argument(0) : 0 ;
	}

	gpgme_conf_arg_t operator()(const char *s) const
	{
	return make_argument(s ? s : "");
	}

	gpgme_conf_arg_t operator()(const std::string &s) const
	{
	return operator()(s.c_str());
	}

	gpgme_conf_arg_t operator()(int i) const
	{
	return make_argument(&i);
	}

	gpgme_conf_arg_t operator()(unsigned int i) const
	{
	return make_argument(&i);
	}

	template <typename T>
	gpgme_conf_arg_t operator()(const std::vector<T> &value) const
	{
	gpgme_conf_arg_t result = 0;
	gpgme_conf_arg_t last = 0;
	for (typename std::vector<T>::const_iterator it = value.begin(), end = value.end() ; it != end ; ++it) {
	if (gpgme_conf_arg_t arg = make_argument(to_void_star(*it))) {
	if (last) {
	last = last->next = arg;
	} else {
	result = last = arg;
	}
	}
	}
	return result;
	}

	};
	}

	static gpgme_conf_arg_t variant_to_argument(const Option::Variant &value)
	{
	VariantToArgumentVisitor v;
	return apply_visitor(v, value);
	}

	optional<Option::Variant> Option::defaultValue() const
	{
	if (isNull()) {
	return optional<Variant>();
	} else {
	return argument_to_variant(opt->alt_type, opt->flags & GPGME_CONF_LIST, opt->default_value);
	}
	}
	#endif

	Argument Option::defaultValue() const
	{
	if (isNull()) {
	return Argument();
	} else {
	return Argument(comp.lock(), opt, opt->default_value, false);
	}
	}

	const char *Option::defaultDescription() const
	{
	return isNull() ? 0 : opt->default_description ;
	}

	Argument Option::noArgumentValue() const
	{
	if (isNull()) {
	return Argument();
	} else {
	return Argument(comp.lock(), opt, opt->no_arg_value, false);
	}
	}

	const char *Option::noArgumentDescription() const
	{
	return isNull() ? 0 : opt->no_arg_description ;
	}

	Argument Option::activeValue() const
	{
	if (isNull()) {
	return Argument();
	} else {
	return Argument(comp.lock(), opt, opt->value, false);
	}
	}

	Argument Option::currentValue() const
	{
	if (isNull()) {
	return Argument();
	}
	const gpgme_conf_arg_t arg =
	opt->change_value ? opt->new_value ? opt->new_value : opt->default_value :
	opt->value ? opt->value :
	/* else */ opt->default_value ;
	return Argument(comp.lock(), opt, arg, false);
	}

	Argument Option::newValue() const
	{
	if (isNull()) {
	return Argument();
	} else {
	return Argument(comp.lock(), opt, opt->new_value, false);
	}
	}

	bool Option::set() const
	{
	if (isNull()) {
	return false;
	} else if (opt->change_value) {
	return opt->new_value;
	} else {
	return opt->value;
	}
	}

	bool Option::dirty() const
	{
	return !isNull() && opt->change_value ;
	}

	Error Option::setNewValue(const Argument &argument)
	{
	if (isNull()) {
	return Error(make_error(GPG_ERR_INV_ARG));
	} else if (argument.isNull()) {
	return resetToDefaultValue();
	} else if (const gpgme_conf_arg_t arg = mygpgme_conf_arg_copy(argument.arg, opt->alt_type)) {
	return Error(gpgme_conf_opt_change(opt, 0, arg));
	} else {
	return Error(make_error(GPG_ERR_ENOMEM));
	}
	}

	Error Option::resetToActiveValue()
	{
	if (isNull()) {
	return Error(make_error(GPG_ERR_INV_ARG));
	} else {
	return Error(gpgme_conf_opt_change(opt, 1, 0));
	}
	}

	Error Option::resetToDefaultValue()
	{
	if (isNull()) {
	return Error(make_error(GPG_ERR_INV_ARG));
	} else {
	return Error(gpgme_conf_opt_change(opt, 0, 0));
	}
	}

	static gpgme_conf_arg_t make_argument(gpgme_conf_type_t type, const void *value)
	{
	gpgme_conf_arg_t arg = 0;
	if (const gpgme_error_t err = gpgme_conf_arg_new(&arg, type, value)) {
	return 0;
	} else {
	return arg;
	}
	}

	Argument Option::createNoneArgument(bool set) const
	{
	if (isNull() \|\| alternateType() != NoType) {
	return Argument();
	} else {
	if (set) {
	return createNoneListArgument(1);
	}
	}
	return Argument();
	}

	Argument Option::createStringArgument(const char *value) const
	{
	if (isNull() \|\| alternateType() != StringType) {
	return Argument();
	} else {
	return Argument(comp.lock(), opt, make_argument(GPGME_CONF_STRING, value), true);
	}
	}

	Argument Option::createStringArgument(const std::string &value) const
	{
	if (isNull() \|\| alternateType() != StringType) {
	return Argument();
	} else {
	return Argument(comp.lock(), opt, make_argument(GPGME_CONF_STRING, value.c_str()), true);
	}
	}

	Argument Option::createIntArgument(int value) const
	{
	if (isNull() \|\| alternateType() != IntegerType) {
	return Argument();
	} else {
	return Argument(comp.lock(), opt, make_argument(GPGME_CONF_INT32, &value), true);
	}
	}

	Argument Option::createUIntArgument(unsigned int value) const
	{
	if (isNull() \|\| alternateType() != UnsignedIntegerType) {
	return Argument();
	} else {
	return Argument(comp.lock(), opt, make_argument(GPGME_CONF_UINT32, &value), true);
	}
	}

	namespace
	{
	const void to_void_star(const char s)
	{
	return s;
	}
	const void *to_void_star(const std::string &s)
	{
	return s.c_str();
	}
	const void *to_void_star(const int &i)
	{
	return &i; // const-&: sic!
	}
	const void *to_void_star(const unsigned int &i)
	{
	return &i; // const-&: sic!
	}

	template <typename T>
	gpgme_conf_arg_t make_argument(gpgme_conf_type_t type, const std::vector<T> &value)
	{
	gpgme_conf_arg_t result = 0;
	gpgme_conf_arg_t last = 0;
	for (typename std::vector<T>::const_iterator it = value.begin(), end = value.end() ; it != end ; ++it) {
	if (gpgme_conf_arg_t arg = make_argument(type, to_void_star(*it))) {
	if (last) {
	last = last->next = arg;
	} else {
	result = last = arg;
	}
	}
	}
	return result;
	}
	}

	Argument Option::createNoneListArgument(unsigned int value) const
	{
	if (value) {
	return Argument(comp.lock(), opt, make_argument(GPGME_CONF_NONE, &value), true);
	}
	return Argument();
	}

	Argument Option::createStringListArgument(const std::vector<const char *> &value) const
	{
	return Argument(comp.lock(), opt, make_argument(GPGME_CONF_STRING, value), true);
	}

	Argument Option::createStringListArgument(const std::vector<std::string> &value) const
	{
	return Argument(comp.lock(), opt, make_argument(GPGME_CONF_STRING, value), true);
	}

	Argument Option::createIntListArgument(const std::vector<int> &value) const
	{
	return Argument(comp.lock(), opt, make_argument(GPGME_CONF_INT32, value), true);
	}

	Argument Option::createUIntListArgument(const std::vector<unsigned int> &value) const
	{
	return Argument(comp.lock(), opt, make_argument(GPGME_CONF_UINT32, value), true);
	}

	Argument::Argument(const shared_gpgme_conf_comp_t &comp, gpgme_conf_opt_t opt, gpgme_conf_arg_t arg, bool owns)
	: comp(comp),
	opt(opt),
	arg(owns ? arg : mygpgme_conf_arg_copy(arg, opt ? opt->alt_type : GPGME_CONF_NONE))
	{

	}

	#if 0
	Argument::Argument(const shared_gpgme_conf_comp_t &comp, gpgme_conf_opt_t opt, gpgme_conf_arg_t arg)
	: comp(comp),
	opt(opt),
	arg(mygpgme_conf_arg_copy(arg, opt ? opt->alt_type : GPGME_CONF_NONE))
	{

	}
	#endif

	Argument::Argument(const Argument &other)
	: comp(other.comp),
	opt(other.opt),
	arg(mygpgme_conf_arg_copy(other.arg, opt ? opt->alt_type : GPGME_CONF_NONE))
	{

	}

	Argument::~Argument()
	{
	gpgme_conf_arg_release(arg, opt ? opt->alt_type : GPGME_CONF_NONE);
	}

	Option Argument::parent() const
	{
	return Option(comp.lock(), opt);
	}

	bool Argument::boolValue() const
	{
	return numberOfTimesSet();
	}

	unsigned int Argument::numElements() const
	{
	if (isNull()) {
	return 0;
	}
	unsigned int result = 0;
	for (gpgme_conf_arg_t a = arg ; a ; a = a->next) {
	++result;
	}
	return result;
	}

	const char *Argument::stringValue(unsigned int idx) const
	{
	if (isNull() \|\| opt->alt_type != GPGME_CONF_STRING) {
	return 0;
	}
	gpgme_conf_arg_t a = arg;
	while (a && idx) {
	a = a->next;
	--idx;
	}
	return a ? a->value.string : 0 ;
	}

	int Argument::intValue(unsigned int idx) const
	{
	if (isNull() \|\| opt->alt_type != GPGME_CONF_INT32) {
	return 0;
	}
	gpgme_conf_arg_t a = arg;
	while (a && idx) {
	a = a->next;
	--idx;
	}
	return a ? a->value.int32 : 0 ;
	}

	unsigned int Argument::uintValue(unsigned int idx) const
	{
	if (isNull() \|\| opt->alt_type != GPGME_CONF_UINT32) {
	return 0;
	}
	gpgme_conf_arg_t a = arg;
	while (a && idx) {
	a = a->next;
	--idx;
	}
	return a ? a->value.uint32 : 0 ;
	}

	unsigned int Argument::numberOfTimesSet() const
	{
	if (isNull() \|\| opt->alt_type != GPGME_CONF_NONE) {
	return 0;
	}
	return arg->value.count;
	}

	std::vector<const char *> Argument::stringValues() const
	{
	if (isNull() \|\| opt->alt_type != GPGME_CONF_STRING) {
	return std::vector<const char *>();
	}
	std::vector<const char *> result;
	for (gpgme_conf_arg_t a = arg ; a ; a = a->next) {
	result.push_back(a->value.string);
	}
	return result;
	}

	std::vector<int> Argument::intValues() const
	{
	if (isNull() \|\| opt->alt_type != GPGME_CONF_INT32) {
	return std::vector<int>();
	}
	std::vector<int> result;
	for (gpgme_conf_arg_t a = arg ; a ; a = a->next) {
	result.push_back(a->value.int32);
	}
	return result;
	}

	std::vector<unsigned int> Argument::uintValues() const
	{
	if (isNull() \|\| opt->alt_type != GPGME_CONF_UINT32) {
	return std::vector<unsigned int>();
	}
	std::vector<unsigned int> result;
	for (gpgme_conf_arg_t a = arg ; a ; a = a->next) {
	result.push_back(a->value.uint32);
	}
	return result;
	}

	std::ostream &Configuration::operator<<(std::ostream &os, Level level)
	{
	switch (level) {
	case Basic: return os << "Basic";
	case Advanced: return os << "Advanced";
	case Expert: return os << "Expert";
	case Invisible: return os << "Invisible";
	case Internal: return os << "Internal";
	case NumLevels: ;
	}
	return os << "<unknown>";
	}

	std::ostream &Configuration::operator<<(std::ostream &os, Type type)
	{
	switch (type) {
	case NoType: return os << "None";
	case StringType: return os << "String";
	case IntegerType: return os << "Integer";
	case UnsignedIntegerType: return os << "UnsignedInteger";
	case FilenameType: return os << "Filename";
	case LdapServerType: return os << "LdapServer";
	case KeyFingerprintType: return os << "KeyFingerprint";
	case PublicKeyType: return os << "PublicKey";
	case SecretKeyType: return os << "SecretKey";
	case AliasListType: return os << "AliasList";
	case MaxType: ;
	}
	return os << "<unknown>";
	}

	std::ostream &Configuration::operator<<(std::ostream &os, Flag f)
	{
	unsigned int flags = f;
	std::vector<const char *> s;
	if (flags & Group) {
	s.push_back("Group");
	}
	if (flags & Optional) {
	s.push_back("Optional");
	}
	if (flags & List) {
	s.push_back("List");
	}
	if (flags & Runtime) {
	s.push_back("Runtime");
	}
	if (flags & Default) {
	s.push_back("Default");
	}
	if (flags & DefaultDescription) {
	s.push_back("DefaultDescription");
	}
	if (flags & NoArgumentDescription) {
	s.push_back("NoArgumentDescription");
	}
	if (flags & NoChange) {
	s.push_back("NoChange");
	}
	flags &= ~(Group \| Optional \| List \| Runtime \| Default \| DefaultDescription \| NoArgumentDescription \| NoChange);
	if (flags) {
	s.push_back("other flags(");
	}
	std::copy(s.begin(), s.end(),
	std::ostream_iterator<const char *>(os, "\|"));
	if (flags) {
	os << flags << ')';
	}
	return os;
	}

	std::ostream &Configuration::operator<<(std::ostream &os, const Component &c)
	{
	os << "Component["
	<< "\n name : " << protect(c.name())
	<< "\n description: " << protect(c.description())
	<< "\n programName: " << protect(c.programName())
	<< "\n options : \n";
	const std::vector<Option> options = c.options();
	std::copy(options.begin(), options.end(),
	std::ostream_iterator<Option>(os, "\n"));
	os << "\n]";
	return os;
	}

	std::ostream &Configuration::operator<<(std::ostream &os, const Option &o)
	{
	return os << "Option["
	<< "\n name: : " << protect(o.name())
	<< "\n description : " << protect(o.description())
	<< "\n argName : " << protect(o.argumentName())
	<< "\n flags : " << static_cast<Flag>(o.flags())
	<< "\n level : " << o.level()
	<< "\n type : " << o.type()
	<< "\n alt_type : " << o.alternateType()
	<< "\n default_val : " << o.defaultValue()
	<< "\n default_desc: " << protect(o.defaultDescription())
	<< "\n no_arg_value: " << o.noArgumentValue()
	<< "\n no_arg_desc : " << protect(o.noArgumentDescription())
	<< "\n active_value: " << o.activeValue()
	<< "\n new_value : " << o.newValue()
	<< "\n --> cur_val : " << o.currentValue()
	<< "\n set : " << o.set()
	<< "\n dirty : " << o.dirty()
	<< "\n]"
	;
	}

	std::ostream &Configuration::operator<<(std::ostream &os, const Argument &a)
	{
	const Option o = a.parent();
	const bool list = o.flags() & List;
	os << "Argument[";
	if (a) {
	switch (o.alternateType()) {
	case NoType:
	if (list) {
	os << a.numberOfTimesSet() << 'x';
	} else {
	os << a.boolValue();
	}
	break;
	default:
	case StringType:
	if (list) {
	const std::vector<const char *> v = a.stringValues();
	os << v.size() << ':';
	// can't use std::copy + ostream_iterator here, since we need the protect() call
	bool first = true;
	std::for_each(v.begin(), v.end(), [&first, &os](const char *s) {
	if (first) {
	first = false;
	} else {
	os << ',';
	}
	os << protect(s);
	});
	} else {
	os << protect(a.stringValue());
	}
	break;
	case IntegerType:
	if (list) {
	const std::vector<int> v = a.intValues();
	os << v.size() << ':';
	std::copy(v.begin(), v.end(),
	std::ostream_iterator<int>(os, ","));
	} else {
	os << a.intValue();
	}
	break;
	case UnsignedIntegerType:
	if (list) {
	const std::vector<unsigned int> v = a.uintValues();
	os << v.size() << ':';
	std::copy(v.begin(), v.end(),
	std::ostream_iterator<unsigned int>(os, ","));
	} else {
	os << a.intValue();
	}
	break;
	}
	}
	return os << ']';
	}

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