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Commit bd6fe569 authored by gabime's avatar gabime
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astyle previous commits

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include/spdlog/fmt/bundled/format.h
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include/spdlog/fmt/bundled/ostream.h
View file @ bd6fe569
......@@ -14,98 +14,101 @@ For the license information refer to format.h.
// #include "format.h"
#include <ostream>
namespace fmt {
namespace internal {
template <class Char>
class FormatBuf: public std::basic_streambuf<Char>
{
private:
typedef typename std::basic_streambuf<Char>::int_type int_type;
typedef typename std::basic_streambuf<Char>::traits_type traits_type;
Buffer<Char> &buffer_;
Char *start_;
public:
FormatBuf(Buffer<Char> &buffer): buffer_(buffer), start_(&buffer[0])
{
this->setp(start_, start_ + buffer_.capacity());
}
int_type overflow(int_type ch = traits_type::eof())
{
if (!traits_type::eq_int_type(ch, traits_type::eof())) {
size_t buf_size = size();
buffer_.resize(buf_size);
buffer_.reserve(buf_size * 2);
start_ = &buffer_[0];
start_[buf_size] = traits_type::to_char_type(ch);
this->setp(start_ + buf_size + 1, start_ + buf_size * 2);
}
return ch;
}
size_t size() const
{
return to_unsigned(this->pptr() - start_);
}
};
Yes &convert(std::ostream &);
struct DummyStream: std::ostream
{
DummyStream(); // Suppress a bogus warning in MSVC.
// Hide all operator<< overloads from std::ostream.
void operator<<(Null<>);
};
No &operator<<(std::ostream &, int);
template<typename T>
struct ConvertToIntImpl<T, true>
{
// Convert to int only if T doesn't have an overloaded operator<<.
enum
{
value = sizeof(convert(get<DummyStream>() << get<T>())) == sizeof(No)
};
};
// Write the content of w to os.
void write(std::ostream &os, Writer &w);
} // namespace internal
// Formats a value.
template <typename Char, typename ArgFormatter, typename T>
void format_arg(BasicFormatter<Char, ArgFormatter> &f,
const Char *&format_str, const T &value)
{
internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE> buffer;
internal::FormatBuf<Char> format_buf(buffer);
std::basic_ostream<Char> output(&format_buf);
output << value;
BasicStringRef<Char> str(&buffer[0], format_buf.size());
typedef internal::MakeArg< BasicFormatter<Char> > MakeArg;
format_str = f.format(format_str, MakeArg(str));
}
/**
\rst
Prints formatted data to the stream *os*.
**Example**::
print(cerr, "Don't {}!", "panic");
\endrst
*/
FMT_API void print(std::ostream &os, CStringRef format_str, ArgList args);
FMT_VARIADIC(void, print, std::ostream &, CStringRef)
namespace fmt
{
namespace internal
{
template <class Char>
class FormatBuf: public std::basic_streambuf<Char>
{
private:
typedef typename std::basic_streambuf<Char>::int_type int_type;
typedef typename std::basic_streambuf<Char>::traits_type traits_type;
Buffer<Char> &buffer_;
Char *start_;
public:
FormatBuf(Buffer<Char> &buffer): buffer_(buffer), start_(&buffer[0])
{
this->setp(start_, start_ + buffer_.capacity());
}
int_type overflow(int_type ch = traits_type::eof())
{
if (!traits_type::eq_int_type(ch, traits_type::eof()))
{
size_t buf_size = size();
buffer_.resize(buf_size);
buffer_.reserve(buf_size * 2);
start_ = &buffer_[0];
start_[buf_size] = traits_type::to_char_type(ch);
this->setp(start_ + buf_size + 1, start_ + buf_size * 2);
}
return ch;
}
size_t size() const
{
return to_unsigned(this->pptr() - start_);
}
};
Yes &convert(std::ostream &);
struct DummyStream: std::ostream
{
DummyStream(); // Suppress a bogus warning in MSVC.
// Hide all operator<< overloads from std::ostream.
void operator<<(Null<>);
};
No &operator<<(std::ostream &, int);
template<typename T>
struct ConvertToIntImpl<T, true>
{
// Convert to int only if T doesn't have an overloaded operator<<.
enum
{
value = sizeof(convert(get<DummyStream>() << get<T>())) == sizeof(No)
};
};
// Write the content of w to os.
void write(std::ostream &os, Writer &w);
} // namespace internal
// Formats a value.
template <typename Char, typename ArgFormatter, typename T>
void format_arg(BasicFormatter<Char, ArgFormatter> &f,
const Char *&format_str, const T &value)
{
internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE> buffer;
internal::FormatBuf<Char> format_buf(buffer);
std::basic_ostream<Char> output(&format_buf);
output << value;
BasicStringRef<Char> str(&buffer[0], format_buf.size());
typedef internal::MakeArg< BasicFormatter<Char> > MakeArg;
format_str = f.format(format_str, MakeArg(str));
}
/**
\rst
Prints formatted data to the stream *os*.
**Example**::
print(cerr, "Don't {}!", "panic");
\endrst
*/
FMT_API void print(std::ostream &os, CStringRef format_str, ArgList args);
FMT_VARIADIC(void, print, std::ostream &, CStringRef)
} // namespace fmt
#ifdef FMT_HEADER_ONLY
......
include/spdlog/fmt/bundled/printf.h
View file @ bd6fe569
......@@ -15,609 +15,640 @@ For the license information refer to format.h.
#include "ostream.h"
namespace fmt {
namespace internal {
// Checks if a value fits in int - used to avoid warnings about comparing
// signed and unsigned integers.
template <bool IsSigned>
struct IntChecker
{
template <typename T>
static bool fits_in_int(T value)
{
unsigned max = std::numeric_limits<int>::max();
return value <= max;
}
static bool fits_in_int(bool)
{
return true;
}
};
template <>
struct IntChecker<true>
{
template <typename T>
static bool fits_in_int(T value)
{
return value >= std::numeric_limits<int>::min() &&
value <= std::numeric_limits<int>::max();
}
static bool fits_in_int(int)
{
return true;
}
};
class PrecisionHandler: public ArgVisitor<PrecisionHandler, int>
{
public:
void report_unhandled_arg()
{
FMT_THROW(FormatError("precision is not integer"));
}
template <typename T>
int visit_any_int(T value)
{
if (!IntChecker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
FMT_THROW(FormatError("number is too big"));
return static_cast<int>(value);
}
};
// IsZeroInt::visit(arg) returns true iff arg is a zero integer.
class IsZeroInt: public ArgVisitor<IsZeroInt, bool>
{
public:
template <typename T>
bool visit_any_int(T value)
{
return value == 0;
}
};
template <typename T, typename U>
struct is_same
{
enum
{
value = 0
};
};
template <typename T>
struct is_same<T, T>
{
enum
{
value = 1
};
};
// An argument visitor that converts an integer argument to T for printf,
// if T is an integral type. If T is void, the argument is converted to
// corresponding signed or unsigned type depending on the type specifier:
// 'd' and 'i' - signed, other - unsigned)
template <typename T = void>
class ArgConverter: public ArgVisitor<ArgConverter<T>, void>
{
private:
internal::Arg &arg_;
wchar_t type_;
FMT_DISALLOW_COPY_AND_ASSIGN(ArgConverter);
public:
ArgConverter(internal::Arg &arg, wchar_t type)
: arg_(arg), type_(type)
{}
void visit_bool(bool value)
{
if (type_ != 's')
visit_any_int(value);
}
template <typename U>
void visit_any_int(U value)
{
bool is_signed = type_ == 'd' || type_ == 'i';
using internal::Arg;
typedef typename internal::Conditional<
is_same<T, void>::value, U, T>::type TargetType;
if (sizeof(TargetType) <= sizeof(int)) {
// Extra casts are used to silence warnings.
if (is_signed) {
arg_.type = Arg::INT;
arg_.int_value = static_cast<int>(static_cast<TargetType>(value));
}
else {
arg_.type = Arg::UINT;
typedef typename internal::MakeUnsigned<TargetType>::Type Unsigned;
arg_.uint_value = static_cast<unsigned>(static_cast<Unsigned>(value));
}
}
else {
if (is_signed) {
arg_.type = Arg::LONG_LONG;
// glibc's printf doesn't sign extend arguments of smaller types:
// std::printf("%lld", -42); // prints "4294967254"
// but we don't have to do the same because it's a UB.
arg_.long_long_value = static_cast<LongLong>(value);
}
else {
arg_.type = Arg::ULONG_LONG;
arg_.ulong_long_value =
static_cast<typename internal::MakeUnsigned<U>::Type>(value);
}
}
}
};
// Converts an integer argument to char for printf.
class CharConverter: public ArgVisitor<CharConverter, void>
{
private:
internal::Arg &arg_;
FMT_DISALLOW_COPY_AND_ASSIGN(CharConverter);
public:
explicit CharConverter(internal::Arg &arg): arg_(arg)
{}
template <typename T>
void visit_any_int(T value)
{
arg_.type = internal::Arg::CHAR;
arg_.int_value = static_cast<char>(value);
}
};
// Checks if an argument is a valid printf width specifier and sets
// left alignment if it is negative.
class WidthHandler: public ArgVisitor<WidthHandler, unsigned>
{
private:
FormatSpec &spec_;
FMT_DISALLOW_COPY_AND_ASSIGN(WidthHandler);
public:
explicit WidthHandler(FormatSpec &spec): spec_(spec)
{}
void report_unhandled_arg()
{
FMT_THROW(FormatError("width is not integer"));
}
template <typename T>
unsigned visit_any_int(T value)
{
typedef typename internal::IntTraits<T>::MainType UnsignedType;
UnsignedType width = static_cast<UnsignedType>(value);
if (internal::is_negative(value)) {
spec_.align_ = ALIGN_LEFT;
width = 0 - width;
}
unsigned int_max = std::numeric_limits<int>::max();
if (width > int_max)
FMT_THROW(FormatError("number is too big"));
return static_cast<unsigned>(width);
}
};
} // namespace internal
/**
\rst
A ``printf`` argument formatter based on the `curiously recurring template
pattern <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_.
To use `~fmt::BasicPrintfArgFormatter` define a subclass that implements some
or all of the visit methods with the same signatures as the methods in
`~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`.
Pass the subclass as the *Impl* template parameter. When a formatting
function processes an argument, it will dispatch to a visit method
specific to the argument type. For example, if the argument type is
``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
will be called. If the subclass doesn't contain a method with this signature,
then a corresponding method of `~fmt::BasicPrintfArgFormatter` or its
superclass will be called.
\endrst
*/
template <typename Impl, typename Char>
class BasicPrintfArgFormatter: public internal::ArgFormatterBase<Impl, Char>
{
private:
void write_null_pointer()
{
this->spec().type_ = 0;
this->write("(nil)");
}
typedef internal::ArgFormatterBase<Impl, Char> Base;
public:
/**
\rst
Constructs an argument formatter object.
*writer* is a reference to the output writer and *spec* contains format
specifier information for standard argument types.
\endrst
*/
BasicPrintfArgFormatter(BasicWriter<Char> &w, FormatSpec &s)
: internal::ArgFormatterBase<Impl, Char>(w, s)
{}
/** Formats an argument of type ``bool``. */
void visit_bool(bool value)
{
FormatSpec &fmt_spec = this->spec();
if (fmt_spec.type_ != 's')
return this->visit_any_int(value);
fmt_spec.type_ = 0;
this->write(value);
}
/** Formats a character. */
void visit_char(int value)
{
const FormatSpec &fmt_spec = this->spec();
BasicWriter<Char> &w = this->writer();
if (fmt_spec.type_ && fmt_spec.type_ != 'c')
w.write_int(value, fmt_spec);
typedef typename BasicWriter<Char>::CharPtr CharPtr;
CharPtr out = CharPtr();
if (fmt_spec.width_ > 1) {
Char fill = ' ';
out = w.grow_buffer(fmt_spec.width_);
if (fmt_spec.align_ != ALIGN_LEFT) {
std::fill_n(out, fmt_spec.width_ - 1, fill);
out += fmt_spec.width_ - 1;
}
else {
std::fill_n(out + 1, fmt_spec.width_ - 1, fill);
}
}
else {
out = w.grow_buffer(1);
}
*out = static_cast<Char>(value);
}
/** Formats a null-terminated C string. */
void visit_cstring(const char *value)
{
if (value)
Base::visit_cstring(value);
else if (this->spec().type_ == 'p')
write_null_pointer();
else
this->write("(null)");
}
/** Formats a pointer. */
void visit_pointer(const void *value)
{
if (value)
return Base::visit_pointer(value);
this->spec().type_ = 0;
write_null_pointer();
}
/** Formats an argument of a custom (user-defined) type. */
void visit_custom(internal::Arg::CustomValue c)
{
BasicFormatter<Char> formatter(ArgList(), this->writer());
const Char format_str[] = { '}', 0 };
const Char *format = format_str;
c.format(&formatter, c.value, &format);
}
};
/** The default printf argument formatter. */
template <typename Char>
class PrintfArgFormatter
: public BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char>
{
public:
/** Constructs an argument formatter object. */
PrintfArgFormatter(BasicWriter<Char> &w, FormatSpec &s)
: BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char>(w, s)
{}
};
/** This template formats data and writes the output to a writer. */
template <typename Char, typename ArgFormatter = PrintfArgFormatter<Char> >
class PrintfFormatter: private internal::FormatterBase
{
private:
BasicWriter<Char> &writer_;
void parse_flags(FormatSpec &spec, const Char *&s);
// Returns the argument with specified index or, if arg_index is equal
// to the maximum unsigned value, the next argument.
internal::Arg get_arg(
const Char *s,
unsigned arg_index = (std::numeric_limits<unsigned>::max)());
// Parses argument index, flags and width and returns the argument index.
unsigned parse_header(const Char *&s, FormatSpec &spec);
public:
/**
\rst
Constructs a ``PrintfFormatter`` object. References to the arguments and
the writer are stored in the formatter object so make sure they have
appropriate lifetimes.
\endrst
*/
explicit PrintfFormatter(const ArgList &al, BasicWriter<Char> &w)
: FormatterBase(al), writer_(w)
{}
/** Formats stored arguments and writes the output to the writer. */
FMT_API void format(BasicCStringRef<Char> format_str);
};
template <typename Char, typename AF>
void PrintfFormatter<Char, AF>::parse_flags(FormatSpec &spec, const Char *&s)
{
for (;;) {
switch (*s++) {
case '-':
spec.align_ = ALIGN_LEFT;
break;
case '+':
spec.flags_ |= SIGN_FLAG | PLUS_FLAG;
break;
case '0':
spec.fill_ = '0';
break;
case ' ':
spec.flags_ |= SIGN_FLAG;
break;
case '#':
spec.flags_ |= HASH_FLAG;
break;
default:
--s;
return;
}
}
}
template <typename Char, typename AF>
internal::Arg PrintfFormatter<Char, AF>::get_arg(const Char *s,
unsigned arg_index)
{
(void)s;
const char *error = FMT_NULL;
internal::Arg arg = arg_index == std::numeric_limits<unsigned>::max() ?
next_arg(error) : FormatterBase::get_arg(arg_index - 1, error);
if (error)
FMT_THROW(FormatError(!*s ? "invalid format string" : error));
return arg;
}
template <typename Char, typename AF>
unsigned PrintfFormatter<Char, AF>::parse_header(
const Char *&s, FormatSpec &spec)
{
unsigned arg_index = std::numeric_limits<unsigned>::max();
Char c = *s;
if (c >= '0' && c <= '9') {
// Parse an argument index (if followed by '$') or a width possibly
// preceded with '0' flag(s).
unsigned value = internal::parse_nonnegative_int(s);
if (*s == '$') { // value is an argument index
++s;
arg_index = value;
}
else {
if (c == '0')
spec.fill_ = '0';
if (value != 0) {
// Nonzero value means that we parsed width and don't need to
// parse it or flags again, so return now.
spec.width_ = value;
return arg_index;
}
}
}
parse_flags(spec, s);
// Parse width.
if (*s >= '0' && *s <= '9') {
spec.width_ = internal::parse_nonnegative_int(s);
}
else if (*s == '*') {
++s;
spec.width_ = internal::WidthHandler(spec).visit(get_arg(s));
}
return arg_index;
}
template <typename Char, typename AF>
void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str)
{
const Char *start = format_str.c_str();
const Char *s = start;
while (*s) {
Char c = *s++;
if (c != '%') continue;
if (*s == c) {
write(writer_, start, s);
start = ++s;
continue;
}
write(writer_, start, s - 1);
FormatSpec spec;
spec.align_ = ALIGN_RIGHT;
// Parse argument index, flags and width.
unsigned arg_index = parse_header(s, spec);
// Parse precision.
if (*s == '.') {
++s;
if ('0' <= *s && *s <= '9') {
spec.precision_ = static_cast<int>(internal::parse_nonnegative_int(s));
}
else if (*s == '*') {
++s;
spec.precision_ = internal::PrecisionHandler().visit(get_arg(s));
}
}
using internal::Arg;
Arg arg = get_arg(s, arg_index);
if (spec.flag(HASH_FLAG) && internal::IsZeroInt().visit(arg))
spec.flags_ &= ~internal::to_unsigned<int>(HASH_FLAG);
if (spec.fill_ == '0') {
if (arg.type <= Arg::LAST_NUMERIC_TYPE)
spec.align_ = ALIGN_NUMERIC;
else
spec.fill_ = ' '; // Ignore '0' flag for non-numeric types.
}
// Parse length and convert the argument to the required type.
using internal::ArgConverter;
switch (*s++) {
case 'h':
if (*s == 'h')
ArgConverter<signed char>(arg, *++s).visit(arg);
else
ArgConverter<short>(arg, *s).visit(arg);
break;
case 'l':
if (*s == 'l')
ArgConverter<fmt::LongLong>(arg, *++s).visit(arg);
else
ArgConverter<long>(arg, *s).visit(arg);
break;
case 'j':
ArgConverter<intmax_t>(arg, *s).visit(arg);
break;
case 'z':
ArgConverter<std::size_t>(arg, *s).visit(arg);
break;
case 't':
ArgConverter<std::ptrdiff_t>(arg, *s).visit(arg);
break;
case 'L':
// printf produces garbage when 'L' is omitted for long double, no
// need to do the same.
break;
default:
--s;
ArgConverter<void>(arg, *s).visit(arg);
}
// Parse type.
if (!*s)
FMT_THROW(FormatError("invalid format string"));
spec.type_ = static_cast<char>(*s++);
if (arg.type <= Arg::LAST_INTEGER_TYPE) {
// Normalize type.
switch (spec.type_) {
case 'i': case 'u':
spec.type_ = 'd';
break;
case 'c':
// TODO: handle wchar_t
internal::CharConverter(arg).visit(arg);
break;
}
}
start = s;
// Format argument.
AF(writer_, spec).visit(arg);
}
write(writer_, start, s);
}
template <typename Char>
void printf(BasicWriter<Char> &w, BasicCStringRef<Char> format, ArgList args)
{
PrintfFormatter<Char>(args, w).format(format);
}
/**
\rst
Formats arguments and returns the result as a string.
**Example**::
std::string message = fmt::sprintf("The answer is %d", 42);
\endrst
*/
inline std::string sprintf(CStringRef format, ArgList args)
{
MemoryWriter w;
printf(w, format, args);
return w.str();
}
FMT_VARIADIC(std::string, sprintf, CStringRef)
inline std::wstring sprintf(WCStringRef format, ArgList args)
{
WMemoryWriter w;
printf(w, format, args);
return w.str();
}
FMT_VARIADIC_W(std::wstring, sprintf, WCStringRef)
/**
\rst
Prints formatted data to the file *f*.
**Example**::
fmt::fprintf(stderr, "Don't %s!", "panic");
\endrst
*/
FMT_API int fprintf(std::FILE *f, CStringRef format, ArgList args);
FMT_VARIADIC(int, fprintf, std::FILE *, CStringRef)
/**
\rst
Prints formatted data to ``stdout``.
**Example**::
fmt::printf("Elapsed time: %.2f seconds", 1.23);
\endrst
*/
inline int printf(CStringRef format, ArgList args)
{
return fprintf(stdout, format, args);
}
FMT_VARIADIC(int, printf, CStringRef)
/**
\rst
Prints formatted data to the stream *os*.
**Example**::
fprintf(cerr, "Don't %s!", "panic");
\endrst
*/
inline int fprintf(std::ostream &os, CStringRef format_str, ArgList args)
{
MemoryWriter w;
printf(w, format_str, args);
internal::write(os, w);
return static_cast<int>(w.size());
}
FMT_VARIADIC(int, fprintf, std::ostream &, CStringRef)
namespace fmt
{
namespace internal
{
// Checks if a value fits in int - used to avoid warnings about comparing
// signed and unsigned integers.
template <bool IsSigned>
struct IntChecker
{
template <typename T>
static bool fits_in_int(T value)
{
unsigned max = std::numeric_limits<int>::max();
return value <= max;
}
static bool fits_in_int(bool)
{
return true;
}
};
template <>
struct IntChecker<true>
{
template <typename T>
static bool fits_in_int(T value)
{
return value >= std::numeric_limits<int>::min() &&
value <= std::numeric_limits<int>::max();
}
static bool fits_in_int(int)
{
return true;
}
};
class PrecisionHandler: public ArgVisitor<PrecisionHandler, int>
{
public:
void report_unhandled_arg()
{
FMT_THROW(FormatError("precision is not integer"));
}
template <typename T>
int visit_any_int(T value)
{
if (!IntChecker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
FMT_THROW(FormatError("number is too big"));
return static_cast<int>(value);
}
};
// IsZeroInt::visit(arg) returns true iff arg is a zero integer.
class IsZeroInt: public ArgVisitor<IsZeroInt, bool>
{
public:
template <typename T>
bool visit_any_int(T value)
{
return value == 0;
}
};
template <typename T, typename U>
struct is_same
{
enum
{
value = 0
};
};
template <typename T>
struct is_same<T, T>
{
enum
{
value = 1
};
};
// An argument visitor that converts an integer argument to T for printf,
// if T is an integral type. If T is void, the argument is converted to
// corresponding signed or unsigned type depending on the type specifier:
// 'd' and 'i' - signed, other - unsigned)
template <typename T = void>
class ArgConverter: public ArgVisitor<ArgConverter<T>, void>
{
private:
internal::Arg &arg_;
wchar_t type_;
FMT_DISALLOW_COPY_AND_ASSIGN(ArgConverter);
public:
ArgConverter(internal::Arg &arg, wchar_t type)
: arg_(arg), type_(type)
{}
void visit_bool(bool value)
{
if (type_ != 's')
visit_any_int(value);
}
template <typename U>
void visit_any_int(U value)
{
bool is_signed = type_ == 'd' || type_ == 'i';
using internal::Arg;
typedef typename internal::Conditional<
is_same<T, void>::value, U, T>::type TargetType;
if (sizeof(TargetType) <= sizeof(int))
{
// Extra casts are used to silence warnings.
if (is_signed)
{
arg_.type = Arg::INT;
arg_.int_value = static_cast<int>(static_cast<TargetType>(value));
}
else
{
arg_.type = Arg::UINT;
typedef typename internal::MakeUnsigned<TargetType>::Type Unsigned;
arg_.uint_value = static_cast<unsigned>(static_cast<Unsigned>(value));
}
}
else
{
if (is_signed)
{
arg_.type = Arg::LONG_LONG;
// glibc's printf doesn't sign extend arguments of smaller types:
// std::printf("%lld", -42); // prints "4294967254"
// but we don't have to do the same because it's a UB.
arg_.long_long_value = static_cast<LongLong>(value);
}
else
{
arg_.type = Arg::ULONG_LONG;
arg_.ulong_long_value =
static_cast<typename internal::MakeUnsigned<U>::Type>(value);
}
}
}
};
// Converts an integer argument to char for printf.
class CharConverter: public ArgVisitor<CharConverter, void>
{
private:
internal::Arg &arg_;
FMT_DISALLOW_COPY_AND_ASSIGN(CharConverter);
public:
explicit CharConverter(internal::Arg &arg): arg_(arg)
{}
template <typename T>
void visit_any_int(T value)
{
arg_.type = internal::Arg::CHAR;
arg_.int_value = static_cast<char>(value);
}
};
// Checks if an argument is a valid printf width specifier and sets
// left alignment if it is negative.
class WidthHandler: public ArgVisitor<WidthHandler, unsigned>
{
private:
FormatSpec &spec_;
FMT_DISALLOW_COPY_AND_ASSIGN(WidthHandler);
public:
explicit WidthHandler(FormatSpec &spec): spec_(spec)
{}
void report_unhandled_arg()
{
FMT_THROW(FormatError("width is not integer"));
}
template <typename T>
unsigned visit_any_int(T value)
{
typedef typename internal::IntTraits<T>::MainType UnsignedType;
UnsignedType width = static_cast<UnsignedType>(value);
if (internal::is_negative(value))
{
spec_.align_ = ALIGN_LEFT;
width = 0 - width;
}
unsigned int_max = std::numeric_limits<int>::max();
if (width > int_max)
FMT_THROW(FormatError("number is too big"));
return static_cast<unsigned>(width);
}
};
} // namespace internal
/**
\rst
A ``printf`` argument formatter based on the `curiously recurring template
pattern <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_.
To use `~fmt::BasicPrintfArgFormatter` define a subclass that implements some
or all of the visit methods with the same signatures as the methods in
`~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`.
Pass the subclass as the *Impl* template parameter. When a formatting
function processes an argument, it will dispatch to a visit method
specific to the argument type. For example, if the argument type is
``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
will be called. If the subclass doesn't contain a method with this signature,
then a corresponding method of `~fmt::BasicPrintfArgFormatter` or its
superclass will be called.
\endrst
*/
template <typename Impl, typename Char>
class BasicPrintfArgFormatter: public internal::ArgFormatterBase<Impl, Char>
{
private:
void write_null_pointer()
{
this->spec().type_ = 0;
this->write("(nil)");
}
typedef internal::ArgFormatterBase<Impl, Char> Base;
public:
/**
\rst
Constructs an argument formatter object.
*writer* is a reference to the output writer and *spec* contains format
specifier information for standard argument types.
\endrst
*/
BasicPrintfArgFormatter(BasicWriter<Char> &w, FormatSpec &s)
: internal::ArgFormatterBase<Impl, Char>(w, s)
{}
/** Formats an argument of type ``bool``. */
void visit_bool(bool value)
{
FormatSpec &fmt_spec = this->spec();
if (fmt_spec.type_ != 's')
return this->visit_any_int(value);
fmt_spec.type_ = 0;
this->write(value);
}
/** Formats a character. */
void visit_char(int value)
{
const FormatSpec &fmt_spec = this->spec();
BasicWriter<Char> &w = this->writer();
if (fmt_spec.type_ && fmt_spec.type_ != 'c')
w.write_int(value, fmt_spec);
typedef typename BasicWriter<Char>::CharPtr CharPtr;
CharPtr out = CharPtr();
if (fmt_spec.width_ > 1)
{
Char fill = ' ';
out = w.grow_buffer(fmt_spec.width_);
if (fmt_spec.align_ != ALIGN_LEFT)
{
std::fill_n(out, fmt_spec.width_ - 1, fill);
out += fmt_spec.width_ - 1;
}
else
{
std::fill_n(out + 1, fmt_spec.width_ - 1, fill);
}
}
else
{
out = w.grow_buffer(1);
}
*out = static_cast<Char>(value);
}
/** Formats a null-terminated C string. */
void visit_cstring(const char *value)
{
if (value)
Base::visit_cstring(value);
else if (this->spec().type_ == 'p')
write_null_pointer();
else
this->write("(null)");
}
/** Formats a pointer. */
void visit_pointer(const void *value)
{
if (value)
return Base::visit_pointer(value);
this->spec().type_ = 0;
write_null_pointer();
}
/** Formats an argument of a custom (user-defined) type. */
void visit_custom(internal::Arg::CustomValue c)
{
BasicFormatter<Char> formatter(ArgList(), this->writer());
const Char format_str[] = { '}', 0 };
const Char *format = format_str;
c.format(&formatter, c.value, &format);
}
};
/** The default printf argument formatter. */
template <typename Char>
class PrintfArgFormatter
: public BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char>
{
public:
/** Constructs an argument formatter object. */
PrintfArgFormatter(BasicWriter<Char> &w, FormatSpec &s)
: BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char>(w, s)
{}
};
/** This template formats data and writes the output to a writer. */
template <typename Char, typename ArgFormatter = PrintfArgFormatter<Char> >
class PrintfFormatter: private internal::FormatterBase
{
private:
BasicWriter<Char> &writer_;
void parse_flags(FormatSpec &spec, const Char *&s);
// Returns the argument with specified index or, if arg_index is equal
// to the maximum unsigned value, the next argument.
internal::Arg get_arg(
const Char *s,
unsigned arg_index = (std::numeric_limits<unsigned>::max)());
// Parses argument index, flags and width and returns the argument index.
unsigned parse_header(const Char *&s, FormatSpec &spec);
public:
/**
\rst
Constructs a ``PrintfFormatter`` object. References to the arguments and
the writer are stored in the formatter object so make sure they have
appropriate lifetimes.
\endrst
*/
explicit PrintfFormatter(const ArgList &al, BasicWriter<Char> &w)
: FormatterBase(al), writer_(w)
{}
/** Formats stored arguments and writes the output to the writer. */
FMT_API void format(BasicCStringRef<Char> format_str);
};
template <typename Char, typename AF>
void PrintfFormatter<Char, AF>::parse_flags(FormatSpec &spec, const Char *&s)
{
for (;;)
{
switch (*s++)
{
case '-':
spec.align_ = ALIGN_LEFT;
break;
case '+':
spec.flags_ |= SIGN_FLAG | PLUS_FLAG;
break;
case '0':
spec.fill_ = '0';
break;
case ' ':
spec.flags_ |= SIGN_FLAG;
break;
case '#':
spec.flags_ |= HASH_FLAG;
break;
default:
--s;
return;
}
}
}
template <typename Char, typename AF>
internal::Arg PrintfFormatter<Char, AF>::get_arg(const Char *s,
unsigned arg_index)
{
(void)s;
const char *error = FMT_NULL;
internal::Arg arg = arg_index == std::numeric_limits<unsigned>::max() ?
next_arg(error) : FormatterBase::get_arg(arg_index - 1, error);
if (error)
FMT_THROW(FormatError(!*s ? "invalid format string" : error));
return arg;
}
template <typename Char, typename AF>
unsigned PrintfFormatter<Char, AF>::parse_header(
const Char *&s, FormatSpec &spec)
{
unsigned arg_index = std::numeric_limits<unsigned>::max();
Char c = *s;
if (c >= '0' && c <= '9')
{
// Parse an argument index (if followed by '$') or a width possibly
// preceded with '0' flag(s).
unsigned value = internal::parse_nonnegative_int(s);
if (*s == '$') // value is an argument index
{
++s;
arg_index = value;
}
else
{
if (c == '0')
spec.fill_ = '0';
if (value != 0)
{
// Nonzero value means that we parsed width and don't need to
// parse it or flags again, so return now.
spec.width_ = value;
return arg_index;
}
}
}
parse_flags(spec, s);
// Parse width.
if (*s >= '0' && *s <= '9')
{
spec.width_ = internal::parse_nonnegative_int(s);
}
else if (*s == '*')
{
++s;
spec.width_ = internal::WidthHandler(spec).visit(get_arg(s));
}
return arg_index;
}
template <typename Char, typename AF>
void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str)
{
const Char *start = format_str.c_str();
const Char *s = start;
while (*s)
{
Char c = *s++;
if (c != '%') continue;
if (*s == c)
{
write(writer_, start, s);
start = ++s;
continue;
}
write(writer_, start, s - 1);
FormatSpec spec;
spec.align_ = ALIGN_RIGHT;
// Parse argument index, flags and width.
unsigned arg_index = parse_header(s, spec);
// Parse precision.
if (*s == '.')
{
++s;
if ('0' <= *s && *s <= '9')
{
spec.precision_ = static_cast<int>(internal::parse_nonnegative_int(s));
}
else if (*s == '*')
{
++s;
spec.precision_ = internal::PrecisionHandler().visit(get_arg(s));
}
}
using internal::Arg;
Arg arg = get_arg(s, arg_index);
if (spec.flag(HASH_FLAG) && internal::IsZeroInt().visit(arg))
spec.flags_ &= ~internal::to_unsigned<int>(HASH_FLAG);
if (spec.fill_ == '0')
{
if (arg.type <= Arg::LAST_NUMERIC_TYPE)
spec.align_ = ALIGN_NUMERIC;
else
spec.fill_ = ' '; // Ignore '0' flag for non-numeric types.
}
// Parse length and convert the argument to the required type.
using internal::ArgConverter;
switch (*s++)
{
case 'h':
if (*s == 'h')
ArgConverter<signed char>(arg, *++s).visit(arg);
else
ArgConverter<short>(arg, *s).visit(arg);
break;
case 'l':
if (*s == 'l')
ArgConverter<fmt::LongLong>(arg, *++s).visit(arg);
else
ArgConverter<long>(arg, *s).visit(arg);
break;
case 'j':
ArgConverter<intmax_t>(arg, *s).visit(arg);
break;
case 'z':
ArgConverter<std::size_t>(arg, *s).visit(arg);
break;
case 't':
ArgConverter<std::ptrdiff_t>(arg, *s).visit(arg);
break;
case 'L':
// printf produces garbage when 'L' is omitted for long double, no
// need to do the same.
break;
default:
--s;
ArgConverter<void>(arg, *s).visit(arg);
}
// Parse type.
if (!*s)
FMT_THROW(FormatError("invalid format string"));
spec.type_ = static_cast<char>(*s++);
if (arg.type <= Arg::LAST_INTEGER_TYPE)
{
// Normalize type.
switch (spec.type_)
{
case 'i':
case 'u':
spec.type_ = 'd';
break;
case 'c':
// TODO: handle wchar_t
internal::CharConverter(arg).visit(arg);
break;
}
}
start = s;
// Format argument.
AF(writer_, spec).visit(arg);
}
write(writer_, start, s);
}
template <typename Char>
void printf(BasicWriter<Char> &w, BasicCStringRef<Char> format, ArgList args)
{
PrintfFormatter<Char>(args, w).format(format);
}
/**
\rst
Formats arguments and returns the result as a string.
**Example**::
std::string message = fmt::sprintf("The answer is %d", 42);
\endrst
*/
inline std::string sprintf(CStringRef format, ArgList args)
{
MemoryWriter w;
printf(w, format, args);
return w.str();
}
FMT_VARIADIC(std::string, sprintf, CStringRef)
inline std::wstring sprintf(WCStringRef format, ArgList args)
{
WMemoryWriter w;
printf(w, format, args);
return w.str();
}
FMT_VARIADIC_W(std::wstring, sprintf, WCStringRef)
/**
\rst
Prints formatted data to the file *f*.
**Example**::
fmt::fprintf(stderr, "Don't %s!", "panic");
\endrst
*/
FMT_API int fprintf(std::FILE *f, CStringRef format, ArgList args);
FMT_VARIADIC(int, fprintf, std::FILE *, CStringRef)
/**
\rst
Prints formatted data to ``stdout``.
**Example**::
fmt::printf("Elapsed time: %.2f seconds", 1.23);
\endrst
*/
inline int printf(CStringRef format, ArgList args)
{
return fprintf(stdout, format, args);
}
FMT_VARIADIC(int, printf, CStringRef)
/**
\rst
Prints formatted data to the stream *os*.
**Example**::
fprintf(cerr, "Don't %s!", "panic");
\endrst
*/
inline int fprintf(std::ostream &os, CStringRef format_str, ArgList args)
{
MemoryWriter w;
printf(w, format_str, args);
internal::write(os, w);
return static_cast<int>(w.size());
}
FMT_VARIADIC(int, fprintf, std::ostream &, CStringRef)
} // namespace fmt
#ifdef FMT_HEADER_ONLY
......
include/spdlog/sinks/sink.h
View file @ bd6fe569
......@@ -17,7 +17,7 @@ class sink
public:
sink()
{
_level = level::trace;
_level = level::trace;
}
virtual ~sink() {}
......
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