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https://github.com/fmtlib/fmt.git
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Support compilation with exceptions disabled
This commit is contained in:
Victor Zverovich
parent
55c61d1abd
commit
8b76e97062
112
format.cc
112
format.cc
@ -54,9 +54,36 @@ using fmt::LongLong;
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using fmt::ULongLong;
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using fmt::internal::Arg;
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// Check if exceptions are disabled.
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#if __GNUC__ && !__EXCEPTIONS
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# define FMT_EXCEPTIONS 0
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#endif
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#if _MSC_VER && !_HAS_EXCEPTIONS
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# define FMT_EXCEPTIONS 0
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#endif
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#ifndef FMT_EXCEPTIONS
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# define FMT_EXCEPTIONS 1
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#endif
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#if FMT_EXCEPTIONS
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# define FMT_TRY try
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# define FMT_CATCH(x) catch (x)
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#else
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# define FMT_TRY if (true)
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# define FMT_CATCH(x) if (false)
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#endif
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#ifndef FMT_THROW
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# if FMT_EXCEPTIONS
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# define FMT_THROW(x) throw x
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# else
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# define FMT_THROW(x) assert(false)
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# endif
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#endif
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#if _MSC_VER
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# pragma warning(push)
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# pragma warning(disable: 4127) // conditional expression is constant
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# pragma warning(disable: 4127) // conditional expression is constant
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#endif
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namespace {
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@ -185,14 +212,15 @@ int parse_nonnegative_int(const Char *&s) {
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value = new_value;
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} while ('0' <= *s && *s <= '9');
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if (value > INT_MAX)
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throw fmt::FormatError("number is too big");
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FMT_THROW(fmt::FormatError("number is too big"));
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return value;
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}
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inline void require_numeric_argument(const Arg &arg, char spec) {
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if (arg.type > Arg::LAST_NUMERIC_TYPE) {
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throw fmt::FormatError(
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fmt::format("format specifier '{}' requires numeric argument", spec));
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std::string message =
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fmt::format("format specifier '{}' requires numeric argument", spec);
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FMT_THROW(fmt::FormatError(message));
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}
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}
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@ -201,8 +229,8 @@ void check_sign(const Char *&s, const Arg &arg) {
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char sign = static_cast<char>(*s);
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require_numeric_argument(arg, sign);
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if (arg.type == Arg::UINT || arg.type == Arg::ULONG_LONG) {
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throw fmt::FormatError(fmt::format(
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"format specifier '{}' requires signed argument", sign));
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FMT_THROW(fmt::FormatError(fmt::format(
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"format specifier '{}' requires signed argument", sign)));
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}
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++s;
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}
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@ -217,7 +245,7 @@ class WidthHandler : public fmt::internal::ArgVisitor<WidthHandler, unsigned> {
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explicit WidthHandler(fmt::FormatSpec &spec) : spec_(spec) {}
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unsigned visit_unhandled_arg() {
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throw fmt::FormatError("width is not integer");
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FMT_THROW(fmt::FormatError("width is not integer"));
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}
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template <typename T>
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@ -229,7 +257,7 @@ class WidthHandler : public fmt::internal::ArgVisitor<WidthHandler, unsigned> {
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width = 0 - width;
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}
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if (width > INT_MAX)
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throw fmt::FormatError("number is too big");
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FMT_THROW(fmt::FormatError("number is too big"));
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return static_cast<unsigned>(width);
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}
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};
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@ -238,13 +266,13 @@ class PrecisionHandler :
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public fmt::internal::ArgVisitor<PrecisionHandler, int> {
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public:
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unsigned visit_unhandled_arg() {
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throw fmt::FormatError("precision is not integer");
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FMT_THROW(fmt::FormatError("precision is not integer"));
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}
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template <typename T>
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int visit_any_int(T value) {
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if (!IntChecker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
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throw fmt::FormatError("number is too big");
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FMT_THROW(fmt::FormatError("number is too big"));
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return static_cast<int>(value);
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}
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};
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@ -385,12 +413,12 @@ const uint64_t fmt::internal::POWERS_OF_10_64[] = {
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void fmt::internal::report_unknown_type(char code, const char *type) {
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if (std::isprint(static_cast<unsigned char>(code))) {
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throw fmt::FormatError(
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fmt::format("unknown format code '{}' for {}", code, type));
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FMT_THROW(fmt::FormatError(
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fmt::format("unknown format code '{}' for {}", code, type)));
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}
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throw fmt::FormatError(
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FMT_THROW(fmt::FormatError(
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fmt::format("unknown format code '\\x{:02x}' for {}",
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static_cast<unsigned>(code), type));
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static_cast<unsigned>(code), type)));
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}
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#ifdef _WIN32
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@ -400,18 +428,18 @@ fmt::internal::UTF8ToUTF16::UTF8ToUTF16(fmt::StringRef s) {
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CP_UTF8, MB_ERR_INVALID_CHARS, s.c_str(), -1, 0, 0);
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static const char ERROR[] = "cannot convert string from UTF-8 to UTF-16";
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if (length == 0)
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throw WindowsError(GetLastError(), ERROR);
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FMT_THROW(WindowsError(GetLastError(), ERROR));
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buffer_.resize(length);
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length = MultiByteToWideChar(
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CP_UTF8, MB_ERR_INVALID_CHARS, s.c_str(), -1, &buffer_[0], length);
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if (length == 0)
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throw WindowsError(GetLastError(), ERROR);
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FMT_THROW(WindowsError(GetLastError(), ERROR));
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}
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fmt::internal::UTF16ToUTF8::UTF16ToUTF8(fmt::WStringRef s) {
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if (int error_code = convert(s)) {
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throw WindowsError(error_code,
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"cannot convert string from UTF-16 to UTF-8");
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FMT_THROW(WindowsError(error_code,
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"cannot convert string from UTF-16 to UTF-8"));
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}
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}
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@ -441,7 +469,7 @@ void fmt::WindowsError::init(
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void fmt::internal::format_system_error(
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fmt::Writer &out, int error_code,
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fmt::StringRef message) FMT_NOEXCEPT(true) {
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try {
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FMT_TRY {
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MemoryBuffer<char, INLINE_BUFFER_SIZE> buffer;
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buffer.resize(INLINE_BUFFER_SIZE);
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char *system_message = 0;
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@ -456,7 +484,7 @@ void fmt::internal::format_system_error(
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break; // Can't get error message, report error code instead.
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buffer.resize(buffer.size() * 2);
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}
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} catch (...) {}
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} FMT_CATCH(...) {}
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format_error_code(out, error_code, message);
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}
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@ -474,7 +502,7 @@ void fmt::internal::format_windows_error(
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LPWSTR *ptr() { return &str_; }
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LPCWSTR c_str() const { return str_; }
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};
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try {
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FMT_TRY {
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String system_message;
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if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0,
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@ -486,7 +514,7 @@ void fmt::internal::format_windows_error(
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return;
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}
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}
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} catch (...) {}
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} FMT_CATCH(...) {}
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format_error_code(out, error_code, message);
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}
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#endif
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@ -519,7 +547,7 @@ class fmt::internal::ArgFormatter :
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return;
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}
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if (spec_.align_ == ALIGN_NUMERIC || spec_.flags_ != 0)
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throw FormatError("invalid format specifier for char");
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FMT_THROW(FormatError("invalid format specifier for char"));
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typedef typename fmt::BasicWriter<Char>::CharPtr CharPtr;
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CharPtr out = CharPtr();
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if (spec_.width_ > 1) {
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@ -571,7 +599,7 @@ void fmt::BasicWriter<Char>::write_str(
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std::size_t size = str.size;
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if (size == 0) {
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if (!s)
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throw FormatError("string pointer is null");
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FMT_THROW(FormatError("string pointer is null"));
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if (*s)
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size = std::char_traits<StrChar>::length(s);
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}
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@ -583,8 +611,10 @@ inline Arg fmt::BasicFormatter<Char>::parse_arg_index(const Char *&s) {
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const char *error = 0;
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Arg arg = *s < '0' || *s > '9' ?
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next_arg(error) : get_arg(parse_nonnegative_int(s), error);
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if (error)
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throw FormatError(*s != '}' && *s != ':' ? "invalid format string" : error);
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if (error) {
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FMT_THROW(FormatError(
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*s != '}' && *s != ':' ? "invalid format string" : error));
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}
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return arg;
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}
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@ -647,7 +677,7 @@ Arg fmt::internal::PrintfFormatter<Char>::get_arg(
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Arg arg = arg_index == UINT_MAX ?
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next_arg(error) : FormatterBase::get_arg(arg_index - 1, error);
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if (error)
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throw FormatError(!*s ? "invalid format string" : error);
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FMT_THROW(FormatError(!*s ? "invalid format string" : error));
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return arg;
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}
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@ -763,7 +793,7 @@ void fmt::internal::PrintfFormatter<Char>::format(
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// Parse type.
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if (!*s)
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throw FormatError("invalid format string");
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FMT_THROW(FormatError("invalid format string"));
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spec.type_ = static_cast<char>(*s++);
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if (arg.type <= Arg::LAST_INTEGER_TYPE) {
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// Normalize type.
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@ -887,7 +917,7 @@ const Char *fmt::BasicFormatter<Char>::format(
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if (p != s) {
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if (c == '}') break;
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if (c == '{')
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throw FormatError("invalid fill character '{'");
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FMT_THROW(FormatError("invalid fill character '{'"));
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s += 2;
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spec.fill_ = c;
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} else ++s;
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@ -931,7 +961,7 @@ const Char *fmt::BasicFormatter<Char>::format(
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// and more efficient than checking if the next char is a digit.
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spec.width_ = parse_nonnegative_int(s);
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if (error)
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throw FormatError(error);
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FMT_THROW(FormatError(error));
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}
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// Parse precision.
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@ -941,17 +971,17 @@ const Char *fmt::BasicFormatter<Char>::format(
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if ('0' <= *s && *s <= '9') {
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spec.precision_ = parse_nonnegative_int(s);
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if (error)
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throw FormatError(error);
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FMT_THROW(FormatError(error));
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} else if (*s == '{') {
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++s;
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const Arg &precision_arg = parse_arg_index(s);
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if (*s++ != '}')
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throw FormatError("invalid format string");
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FMT_THROW(FormatError("invalid format string"));
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ULongLong value = 0;
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switch (precision_arg.type) {
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case Arg::INT:
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if (precision_arg.int_value < 0)
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throw FormatError("negative precision");
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FMT_THROW(FormatError("negative precision"));
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value = precision_arg.int_value;
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break;
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case Arg::UINT:
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@ -959,24 +989,24 @@ const Char *fmt::BasicFormatter<Char>::format(
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break;
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case Arg::LONG_LONG:
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if (precision_arg.long_long_value < 0)
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throw FormatError("negative precision");
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FMT_THROW(FormatError("negative precision"));
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value = precision_arg.long_long_value;
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break;
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case Arg::ULONG_LONG:
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value = precision_arg.ulong_long_value;
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break;
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default:
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throw FormatError("precision is not integer");
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FMT_THROW(FormatError("precision is not integer"));
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}
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if (value > INT_MAX)
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throw FormatError("number is too big");
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FMT_THROW(FormatError("number is too big"));
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spec.precision_ = static_cast<int>(value);
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} else {
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throw FormatError("missing precision specifier");
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FMT_THROW(FormatError("missing precision specifier"));
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}
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if (arg.type != Arg::DOUBLE && arg.type != Arg::LONG_DOUBLE) {
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throw FormatError(
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"precision specifier requires floating-point argument");
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FMT_THROW(FormatError(
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"precision specifier requires floating-point argument"));
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}
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}
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@ -986,7 +1016,7 @@ const Char *fmt::BasicFormatter<Char>::format(
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}
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if (*s++ != '}')
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throw FormatError("missing '}' in format string");
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FMT_THROW(FormatError("missing '}' in format string"));
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start_ = s;
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// Format argument.
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@ -1008,7 +1038,7 @@ void fmt::BasicFormatter<Char>::format(
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continue;
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}
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if (c == '}')
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throw FormatError("unmatched '}' in format string");
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FMT_THROW(FormatError("unmatched '}' in format string"));
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write(writer_, start_, s - 1);
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Arg arg = parse_arg_index(s);
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s = format(s, arg);
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@ -58,6 +58,14 @@ if (HAVE_OPEN)
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add_test(posix-test posix-test)
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endif ()
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# Test that the library can be compiled with exceptions disabled.
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check_cxx_compiler_flag(-fno-exceptions HAVE_FNO_EXCEPTIONS_FLAG)
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if (HAVE_FNO_EXCEPTIONS_FLAG)
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add_library(noexception-test ../format.cc)
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set_target_properties(noexception-test
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PROPERTIES COMPILE_FLAGS -fno-exceptions)
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endif ()
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add_test(compile-test ${CMAKE_CTEST_COMMAND}
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--build-and-test
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"${CMAKE_CURRENT_SOURCE_DIR}/compile-test"
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