120 lines
2.6 KiB
C++
120 lines
2.6 KiB
C++
//---
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// fxos.errors: Exception specification
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//
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// fxos uses the following exception classes when reporting errors.
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//
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// Fatal errors (caught by main):
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// std::logic_error Internal consistency, fxos is broken
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// FxOS::LimitError fxos doesn't know how to handle the input
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// FxOS::LangError Program is invalid or database too poor
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//
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// Recoverable errors:
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// std::runtime_error External errors (fi. file access)
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// FxOS::SyntaxError Invalid fxos data file syntax (file is skipped)
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// FxOS::AddressError Invalid virtual address (not bound)
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//---
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#ifndef LIBFXOS_ERRORS_H
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#define LIBFXOS_ERRORS_H
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#include <fxos/util.h>
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#include <exception>
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#include <string>
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namespace FxOS {
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/* Syntax errors for fxos data files. This is always an external error, and
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reported to the user as an error message. */
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class SyntaxError: public std::exception
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{
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public:
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/* Specifies the file and line of the exception */
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SyntaxError(char const *file, int line, char const *what):
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m_file(file), m_line(line), m_what(what) {}
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/* Provides access to these objects */
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char const *file() const noexcept {
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return m_file;
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}
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int line() const noexcept {
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return m_line;
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}
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char const *what() const noexcept override {
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return m_what;
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}
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/* Additional friendly formatter */
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std::string str() const noexcept {
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return format("%s:%d: %s", m_file, m_line, m_what);
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}
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private:
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char const *m_file;
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int m_line;
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char const *m_what;
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};
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/* Language errors for the disassembler. These are either bugs in fxos or
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caused by corrupted code files. */
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class LangError: public std::exception
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{
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public:
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LangError(uint32_t address, char const *what):
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m_addr(address), m_what(what) {}
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uint32_t addr() const noexcept {
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return m_addr;
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}
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char const *what() const noexcept override {
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return m_what;
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}
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private:
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uint32_t m_addr;
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char const *m_what;
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};
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/* Address errors */
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class AddressError: public std::exception
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{
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public:
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static constexpr char const *default_message = "unmapped address";
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AddressError(uint32_t address, int size,
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char const *what = default_message):
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m_addr(address), m_size(size), m_what(what) {}
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uint32_t addr() const noexcept {
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return m_addr;
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}
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int size() const noexcept {
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return m_size;
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}
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char const *what() const noexcept override {
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return m_what;
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}
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private:
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uint32_t m_addr;
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int m_size;
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char const *m_what;
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};
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/* Limitations of fxos */
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class LimitError: public std::exception
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{
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public:
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LimitError(char const *what): m_what(what) {}
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char const *what() const noexcept override {
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return m_what;
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}
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private:
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char const *m_what;
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};
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} /* namespace FxOS */
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#endif /* LIBFXOS_ERRORS_H */
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