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LibPDF: Propagate errors in Parser and Document

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Matthew Olsson 2022-03-05 17:30:55 -07:00 • committed by Andreas Kling
parent 7e1c823725
commit 73cf8205b4
16 changed files with 472 additions and 420 deletions
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83
Userland/Libraries/LibPDF/Object.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
* Copyright (c) 2021-2022, Matthew Olsson <mattco@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -11,9 +11,29 @@
#include <AK/Format.h>
#include <AK/RefCounted.h>
#include <AK/SourceLocation.h>
#include <LibPDF/Error.h>
#include <LibPDF/Forward.h>
#include <LibPDF/Value.h>
#ifdef PDF_DEBUG
namespace {
template<PDF::IsObject T>
const char* object_name()
{
# define ENUMERATE_TYPE(class_name, snake_name) \
if constexpr (IsSame<PDF::class_name, T>) { \
return #class_name; \
}
ENUMERATE_OBJECT_TYPES(ENUMERATE_TYPE)
# undef ENUMERATE_TYPE
VERIFY_NOT_REACHED();
}
}
#endif
namespace PDF {
class Object : public RefCounted<Object> {
@ -23,40 +43,49 @@ public:
[[nodiscard]] ALWAYS_INLINE u32 generation_index() const { return m_generation_index; }
ALWAYS_INLINE void set_generation_index(u32 generation_index) { m_generation_index = generation_index; }
#define DEFINE_ID(_, name) \
virtual bool is_##name() const { return false; }
ENUMERATE_OBJECT_TYPES(DEFINE_ID)
#undef DEFINE_ID
template<IsObject T>
bool is() const requires(!IsSame<T, Object>)
{
#define ENUMERATE_TYPE(class_name, snake_name) \
if constexpr (IsSame<class_name, T>) { \
return is_##snake_name(); \
}
ENUMERATE_OBJECT_TYPES(ENUMERATE_TYPE)
#undef ENUMERATE_TYPE
VERIFY_NOT_REACHED();
}
template<IsObject T>
[[nodiscard]] ALWAYS_INLINE NonnullRefPtr<T> cast(
#ifdef PDF_DEBUG
SourceLocation loc = SourceLocation::current()
#endif
) const requires(!IsSame<T, Object>)
{
#ifdef PDF_DEBUG
if (!is<T>()) {
dbgln("{} invalid cast from {} to {}", loc, type_name(), object_name<T>());
VERIFY_NOT_REACHED();
}
#endif
return NonnullRefPtr<T>(static_cast<T const&>(*this));
}
virtual const char* type_name() const = 0;
virtual String to_string(int indent) const = 0;
protected:
#define ENUMERATE_TYPE(_, name) \
virtual bool is_##name() const { return false; }
ENUMERATE_OBJECT_TYPES(ENUMERATE_TYPE)
#undef ENUMERATE_TYPE
private:
u32 m_generation_index { 0 };
};
template<IsObject To, IsObject From>
[[nodiscard]] ALWAYS_INLINE static NonnullRefPtr<To> object_cast(NonnullRefPtr<From> obj
#ifdef PDF_DEBUG
,
SourceLocation loc = SourceLocation::current()
#endif
)
{
#ifdef PDF_DEBUG
# define ENUMERATE_TYPES(class_name, snake_name) \
if constexpr (IsSame<To, class_name>) { \
if (!obj->is_##snake_name()) { \
dbgln("{} invalid cast from type {} to type " #snake_name, loc, obj->type_name()); \
} \
}
ENUMERATE_OBJECT_TYPES(ENUMERATE_TYPES)
# undef ENUMERATE_TYPES
#endif
return static_ptr_cast<To>(obj);
}
}
namespace AK {