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#include <qpdf/QPDFLogger.hh>
#include <qpdf/Pl_Discard.hh>
#include <qpdf/Pl_OStream.hh>
#include <qpdf/QUtil.hh>
#include <iostream>
#include <stdexcept>
namespace
{
class Pl_Track: public Pipeline
{
public:
Pl_Track(char const* identifier, Pipeline* next) :
Pipeline(identifier, next),
used(false)
{
}
virtual void
write(unsigned char const* data, size_t len) override
{
this->used = true;
getNext()->write(data, len);
}
virtual void
finish() override
{
getNext()->finish();
}
bool
getUsed() const
{
return used;
}
private:
bool used;
};
}; // namespace
QPDFLogger::Members::Members() :
p_discard(new Pl_Discard()),
p_real_stdout(new Pl_OStream("standard output", std::cout)),
p_stdout(new Pl_Track("track stdout", p_real_stdout.get())),
p_stderr(new Pl_OStream("standard error", std::cerr)),
p_info(p_stdout),
p_warn(nullptr),
p_error(p_stderr),
p_save(nullptr)
{
}
QPDFLogger::Members::~Members()
{
p_stdout->finish();
p_stderr->finish();
}
QPDFLogger::QPDFLogger() :
m(new Members())
{
}
std::shared_ptr<QPDFLogger>
QPDFLogger::defaultLogger()
{
static auto l = std::make_shared<QPDFLogger>();
return l;
}
void
QPDFLogger::info(char const* s)
{
getInfo(false)->writeCStr(s);
}
void
QPDFLogger::info(std::string const& s)
{
getInfo(false)->writeString(s);
}
std::shared_ptr<Pipeline>
QPDFLogger::getInfo(bool null_okay)
{
return throwIfNull(this->m->p_info, null_okay);
}
void
QPDFLogger::warn(char const* s)
{
getWarn(false)->writeCStr(s);
}
void
QPDFLogger::warn(std::string const& s)
{
getWarn(false)->writeString(s);
}
std::shared_ptr<Pipeline>
QPDFLogger::getWarn(bool null_okay)
{
if (this->m->p_warn) {
return this->m->p_warn;
}
return getError(null_okay);
}
void
QPDFLogger::error(char const* s)
{
getError(false)->writeCStr(s);
}
void
QPDFLogger::error(std::string const& s)
{
getError(false)->writeString(s);
}
std::shared_ptr<Pipeline>
QPDFLogger::getError(bool null_okay)
{
return throwIfNull(this->m->p_error, null_okay);
}
std::shared_ptr<Pipeline>
QPDFLogger::getSave(bool null_okay)
{
return throwIfNull(this->m->p_save, null_okay);
}
std::shared_ptr<Pipeline>
QPDFLogger::standardOutput()
{
return this->m->p_stdout;
}
std::shared_ptr<Pipeline>
QPDFLogger::standardError()
{
return this->m->p_stderr;
}
std::shared_ptr<Pipeline>
QPDFLogger::discard()
{
return this->m->p_discard;
}
void
QPDFLogger::setInfo(std::shared_ptr<Pipeline> p)
{
if (p == nullptr) {
if (this->m->p_save == this->m->p_stdout) {
p = this->m->p_stderr;
} else {
p = this->m->p_stdout;
}
}
this->m->p_info = p;
}
void
QPDFLogger::setWarn(std::shared_ptr<Pipeline> p)
{
this->m->p_warn = p;
}
void
QPDFLogger::setError(std::shared_ptr<Pipeline> p)
{
if (p == nullptr) {
p = this->m->p_stderr;
}
this->m->p_error = p;
}
void
QPDFLogger::setSave(std::shared_ptr<Pipeline> p, bool only_if_not_set)
{
if (only_if_not_set && (this->m->p_save != nullptr)) {
return;
}
if (this->m->p_save == p) {
return;
}
if (p == this->m->p_stdout) {
auto pt = dynamic_cast<Pl_Track*>(p.get());
if (pt->getUsed()) {
throw std::logic_error(
"QPDFLogger: called setSave on standard output after standard"
" output has already been used");
}
if (this->m->p_info == this->m->p_stdout) {
this->m->p_info = this->m->p_stderr;
}
QUtil::binary_stdout();
}
this->m->p_save = p;
}
void
QPDFLogger::saveToStandardOutput(bool only_if_not_set)
{
setSave(standardOutput(), only_if_not_set);
}
void
QPDFLogger::setOutputStreams(std::ostream* out_stream, std::ostream* err_stream)
{
if (out_stream == &std::cout) {
out_stream = nullptr;
}
if (err_stream == &std::cerr) {
err_stream = nullptr;
}
std::shared_ptr<Pipeline> new_out;
std::shared_ptr<Pipeline> new_err;
if (out_stream == nullptr) {
if (this->m->p_save == this->m->p_stdout) {
new_out = this->m->p_stderr;
} else {
new_out = this->m->p_stdout;
}
} else {
new_out = std::make_shared<Pl_OStream>("output", *out_stream);
}
if (err_stream == nullptr) {
new_err = this->m->p_stderr;
} else {
new_err = std::make_shared<Pl_OStream>("error output", *err_stream);
}
this->m->p_info = new_out;
this->m->p_warn = nullptr;
this->m->p_error = new_err;
}
std::shared_ptr<Pipeline>
QPDFLogger::throwIfNull(std::shared_ptr<Pipeline> p, bool null_okay)
{
if (!(null_okay || p)) {
throw std::logic_error(
"QPDFLogger: requested a null pipeline without null_okay == true");
}
return p;
}
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