diff options
Diffstat (limited to 'src/tinyformat.h')
| -rw-r--r-- | src/tinyformat.h | 723 |
1 files changed, 389 insertions, 334 deletions
diff --git a/src/tinyformat.h b/src/tinyformat.h index 73d49a1fe4..d34cfaa94f 100644 --- a/src/tinyformat.h +++ b/src/tinyformat.h @@ -67,7 +67,9 @@ // weekday, month, day, hour, min); // std::cout << date; // -// These are the three primary interface functions. +// These are the three primary interface functions. There is also a +// convenience function printfln() which appends a newline to the usual result +// of printf() for super simple logging. // // // User defined format functions @@ -86,6 +88,18 @@ // defined function bodies, use the macro TINYFORMAT_FOREACH_ARGNUM. For an // example, see the implementation of printf() at the end of the source file. // +// Sometimes it's useful to be able to pass a list of format arguments through +// to a non-template function. The FormatList class is provided as a way to do +// this by storing the argument list in a type-opaque way. Continuing the +// example from above, we construct a FormatList using makeFormatList(): +// +// FormatListRef formatList = tfm::makeFormatList(weekday, month, day, hour, min); +// +// The format list can now be passed into any non-template function and used +// via a call to the vformat() function: +// +// tfm::vformat(std::cout, "%s, %s %d, %.2d:%.2d\n", formatList); +// // // Additional API information // -------------------------- @@ -109,15 +123,16 @@ namespace tinyformat {} namespace tfm = tinyformat; // Error handling; calls assert() by default. -#define TINYFORMAT_ERROR(reasonString) throw std::runtime_error(reasonString) +#define TINYFORMAT_ERROR(reasonString) throw tinyformat::format_error(reasonString) // Define for C++11 variadic templates which make the code shorter & more // general. If you don't define this, C++11 support is autodetected below. -// #define TINYFORMAT_USE_VARIADIC_TEMPLATES +#define TINYFORMAT_USE_VARIADIC_TEMPLATES //------------------------------------------------------------------------------ // Implementation details. +#include <algorithm> #include <cassert> #include <iostream> #include <sstream> @@ -133,22 +148,29 @@ namespace tfm = tinyformat; # endif #endif -#ifdef __GNUC__ -# define TINYFORMAT_NOINLINE __attribute__((noinline)) -#elif defined(_MSC_VER) -# define TINYFORMAT_NOINLINE __declspec(noinline) -#else -# define TINYFORMAT_NOINLINE -#endif - #if defined(__GLIBCXX__) && __GLIBCXX__ < 20080201 // std::showpos is broken on old libstdc++ as provided with OSX. See // http://gcc.gnu.org/ml/libstdc++/2007-11/msg00075.html # define TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND #endif +#ifdef __APPLE__ +// Workaround OSX linker warning: xcode uses different default symbol +// visibilities for static libs vs executables (see issue #25) +# define TINYFORMAT_HIDDEN __attribute__((visibility("hidden"))) +#else +# define TINYFORMAT_HIDDEN +#endif + namespace tinyformat { +class format_error: public std::runtime_error +{ +public: + explicit format_error(const std::string &what): std::runtime_error(what) { + } +}; + //------------------------------------------------------------------------------ namespace detail { @@ -247,6 +269,29 @@ struct convertToInt<T,true> static int invoke(const T& value) { return static_cast<int>(value); } }; +// Format at most ntrunc characters to the given stream. +template<typename T> +inline void formatTruncated(std::ostream& out, const T& value, int ntrunc) +{ + std::ostringstream tmp; + tmp << value; + std::string result = tmp.str(); + out.write(result.c_str(), (std::min)(ntrunc, static_cast<int>(result.size()))); +} +#define TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR(type) \ +inline void formatTruncated(std::ostream& out, type* value, int ntrunc) \ +{ \ + std::streamsize len = 0; \ + while(len < ntrunc && value[len] != 0) \ + ++len; \ + out.write(value, len); \ +} +// Overload for const char* and char*. Could overload for signed & unsigned +// char too, but these are technically unneeded for printf compatibility. +TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR(const char) +TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR(char) +#undef TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR + } // namespace detail @@ -255,18 +300,20 @@ struct convertToInt<T,true> // desired. -// Format a value into a stream. Called from format() for all types by default. -// -// Users may override this for their own types. When this function is called, -// the stream flags will have been modified according to the format string. -// The format specification is provided in the range [fmtBegin, fmtEnd). -// -// By default, formatValue() uses the usual stream insertion operator -// operator<< to format the type T, with special cases for the %c and %p -// conversions. +/// Format a value into a stream, delegating to operator<< by default. +/// +/// Users may override this for their own types. When this function is called, +/// the stream flags will have been modified according to the format string. +/// The format specification is provided in the range [fmtBegin, fmtEnd). For +/// truncating conversions, ntrunc is set to the desired maximum number of +/// characters, for example "%.7s" calls formatValue with ntrunc = 7. +/// +/// By default, formatValue() uses the usual stream insertion operator +/// operator<< to format the type T, with special cases for the %c and %p +/// conversions. template<typename T> inline void formatValue(std::ostream& out, const char* /*fmtBegin*/, - const char* fmtEnd, const T& value) + const char* fmtEnd, int ntrunc, const T& value) { #ifndef TINYFORMAT_ALLOW_WCHAR_STRINGS // Since we don't support printing of wchar_t using "%ls", make it fail at @@ -288,6 +335,12 @@ inline void formatValue(std::ostream& out, const char* /*fmtBegin*/, #ifdef TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND else if(detail::formatZeroIntegerWorkaround<T>::invoke(out, value)) /**/; #endif + else if(ntrunc >= 0) + { + // Take care not to overread C strings in truncating conversions like + // "%.4s" where at most 4 characters may be read. + detail::formatTruncated(out, value, ntrunc); + } else out << value; } @@ -296,7 +349,7 @@ inline void formatValue(std::ostream& out, const char* /*fmtBegin*/, // Overloaded version for char types to support printing as an integer #define TINYFORMAT_DEFINE_FORMATVALUE_CHAR(charType) \ inline void formatValue(std::ostream& out, const char* /*fmtBegin*/, \ - const char* fmtEnd, charType value) \ + const char* fmtEnd, int /**/, charType value) \ { \ switch(*(fmtEnd-1)) \ { \ @@ -435,225 +488,99 @@ cog.outl('#define TINYFORMAT_FOREACH_ARGNUM(m) \\\n ' + namespace detail { -// Class holding current position in format string and an output stream into -// which arguments are formatted. -class FormatIterator +// Type-opaque holder for an argument to format(), with associated actions on +// the type held as explicit function pointers. This allows FormatArg's for +// each argument to be allocated as a homogenous array inside FormatList +// whereas a naive implementation based on inheritance does not. +class FormatArg { public: - // Flags for features not representable with standard stream state - enum ExtraFormatFlags - { - Flag_None = 0, - Flag_TruncateToPrecision = 1<<0, // truncate length to stream precision() - Flag_SpacePadPositive = 1<<1, // pad positive values with spaces - Flag_VariableWidth = 1<<2, // variable field width in arg list - Flag_VariablePrecision = 1<<3 // variable field precision in arg list - }; - - // out is the output stream, fmt is the full format string - FormatIterator(std::ostream& out, const char* fmt) - : m_out(out), - m_fmt(fmt), - m_extraFlags(Flag_None), - m_wantWidth(false), - m_wantPrecision(false), - m_variableWidth(0), - m_variablePrecision(0), - m_origWidth(out.width()), - m_origPrecision(out.precision()), - m_origFlags(out.flags()), - m_origFill(out.fill()) + FormatArg() + : m_value(nullptr), + m_formatImpl(nullptr), + m_toIntImpl(nullptr) + { } + + template<typename T> + explicit FormatArg(const T& value) + : m_value(static_cast<const void*>(&value)), + m_formatImpl(&formatImpl<T>), + m_toIntImpl(&toIntImpl<T>) { } - // Print remaining part of format string. - void finish() + void format(std::ostream& out, const char* fmtBegin, + const char* fmtEnd, int ntrunc) const { - // It would be nice if we could do this from the destructor, but we - // can't if TINFORMAT_ERROR is used to throw an exception! - m_fmt = printFormatStringLiteral(m_out, m_fmt); - if(*m_fmt != '\0') - TINYFORMAT_ERROR("tinyformat: Too many conversion specifiers in format string"); + assert(m_value); + assert(m_formatImpl); + m_formatImpl(out, fmtBegin, fmtEnd, ntrunc, m_value); } - ~FormatIterator() + int toInt() const { - // Restore stream state - m_out.width(m_origWidth); - m_out.precision(m_origPrecision); - m_out.flags(m_origFlags); - m_out.fill(m_origFill); + assert(m_value); + assert(m_toIntImpl); + return m_toIntImpl(m_value); } - template<typename T> - void accept(const T& value); - private: - // Parse and return an integer from the string c, as atoi() - // On return, c is set to one past the end of the integer. - static int parseIntAndAdvance(const char*& c) + template<typename T> + TINYFORMAT_HIDDEN static void formatImpl(std::ostream& out, const char* fmtBegin, + const char* fmtEnd, int ntrunc, const void* value) { - int i = 0; - for(;*c >= '0' && *c <= '9'; ++c) - i = 10*i + (*c - '0'); - return i; + formatValue(out, fmtBegin, fmtEnd, ntrunc, *static_cast<const T*>(value)); } - // Format at most truncLen characters of a C string to the given - // stream. Return true if formatting proceeded (generic version always - // returns false) template<typename T> - static bool formatCStringTruncate(std::ostream& /*out*/, const T& /*value*/, - std::streamsize /*truncLen*/) - { - return false; - } -# define TINYFORMAT_DEFINE_FORMAT_C_STRING_TRUNCATE(type) \ - static bool formatCStringTruncate(std::ostream& out, type* value, \ - std::streamsize truncLen) \ - { \ - std::streamsize len = 0; \ - while(len < truncLen && value[len] != 0) \ - ++len; \ - out.write(value, len); \ - return true; \ - } - // Overload for const char* and char*. Could overload for signed & - // unsigned char too, but these are technically unneeded for printf - // compatibility. - TINYFORMAT_DEFINE_FORMAT_C_STRING_TRUNCATE(const char) - TINYFORMAT_DEFINE_FORMAT_C_STRING_TRUNCATE(char) -# undef TINYFORMAT_DEFINE_FORMAT_C_STRING_TRUNCATE - - // Print literal part of format string and return next format spec - // position. - // - // Skips over any occurrences of '%%', printing a literal '%' to the - // output. The position of the first % character of the next - // nontrivial format spec is returned, or the end of string. - static const char* printFormatStringLiteral(std::ostream& out, - const char* fmt) + TINYFORMAT_HIDDEN static int toIntImpl(const void* value) { - const char* c = fmt; - for(; true; ++c) - { - switch(*c) - { - case '\0': - out.write(fmt, static_cast<std::streamsize>(c - fmt)); - return c; - case '%': - out.write(fmt, static_cast<std::streamsize>(c - fmt)); - if(*(c+1) != '%') - return c; - // for "%%", tack trailing % onto next literal section. - fmt = ++c; - break; - } - } + return convertToInt<T>::invoke(*static_cast<const T*>(value)); } - static const char* streamStateFromFormat(std::ostream& out, - unsigned int& extraFlags, - const char* fmtStart, - int variableWidth, - int variablePrecision); - - // Private copy & assign: Kill gcc warnings with -Weffc++ - FormatIterator(const FormatIterator&); - FormatIterator& operator=(const FormatIterator&); - - // Stream, current format string & state - std::ostream& m_out; - const char* m_fmt; - unsigned int m_extraFlags; - // State machine info for handling of variable width & precision - bool m_wantWidth; - bool m_wantPrecision; - int m_variableWidth; - int m_variablePrecision; - // Saved stream state - std::streamsize m_origWidth; - std::streamsize m_origPrecision; - std::ios::fmtflags m_origFlags; - char m_origFill; + const void* m_value; + void (*m_formatImpl)(std::ostream& out, const char* fmtBegin, + const char* fmtEnd, int ntrunc, const void* value); + int (*m_toIntImpl)(const void* value); }; -// Accept a value for formatting into the internal stream. -template<typename T> -TINYFORMAT_NOINLINE // < greatly reduces bloat in optimized builds -void FormatIterator::accept(const T& value) +// Parse and return an integer from the string c, as atoi() +// On return, c is set to one past the end of the integer. +inline int parseIntAndAdvance(const char*& c) { - // Parse the format string - const char* fmtEnd = 0; - if(m_extraFlags == Flag_None && !m_wantWidth && !m_wantPrecision) - { - m_fmt = printFormatStringLiteral(m_out, m_fmt); - fmtEnd = streamStateFromFormat(m_out, m_extraFlags, m_fmt, 0, 0); - m_wantWidth = (m_extraFlags & Flag_VariableWidth) != 0; - m_wantPrecision = (m_extraFlags & Flag_VariablePrecision) != 0; - } - // Consume value as variable width and precision specifier if necessary - if(m_extraFlags & (Flag_VariableWidth | Flag_VariablePrecision)) - { - if(m_wantWidth || m_wantPrecision) - { - int v = convertToInt<T>::invoke(value); - if(m_wantWidth) - { - m_variableWidth = v; - m_wantWidth = false; - } - else if(m_wantPrecision) - { - m_variablePrecision = v; - m_wantPrecision = false; - } - return; - } - // If we get here, we've set both the variable precision and width as - // required and we need to rerun the stream state setup to insert these. - fmtEnd = streamStateFromFormat(m_out, m_extraFlags, m_fmt, - m_variableWidth, m_variablePrecision); - } + int i = 0; + for(;*c >= '0' && *c <= '9'; ++c) + i = 10*i + (*c - '0'); + return i; +} - // Format the value into the stream. - if(!(m_extraFlags & (Flag_SpacePadPositive | Flag_TruncateToPrecision))) - formatValue(m_out, m_fmt, fmtEnd, value); - else +// Print literal part of format string and return next format spec +// position. +// +// Skips over any occurrences of '%%', printing a literal '%' to the +// output. The position of the first % character of the next +// nontrivial format spec is returned, or the end of string. +inline const char* printFormatStringLiteral(std::ostream& out, const char* fmt) +{ + const char* c = fmt; + for(;; ++c) { - // The following are special cases where there's no direct - // correspondence between stream formatting and the printf() behaviour. - // Instead, we simulate the behaviour crudely by formatting into a - // temporary string stream and munging the resulting string. - std::ostringstream tmpStream; - tmpStream.copyfmt(m_out); - if(m_extraFlags & Flag_SpacePadPositive) - tmpStream.setf(std::ios::showpos); - // formatCStringTruncate is required for truncating conversions like - // "%.4s" where at most 4 characters of the c-string should be read. - // If we didn't include this special case, we might read off the end. - if(!( (m_extraFlags & Flag_TruncateToPrecision) && - formatCStringTruncate(tmpStream, value, m_out.precision()) )) - { - // Not a truncated c-string; just format normally. - formatValue(tmpStream, m_fmt, fmtEnd, value); - } - std::string result = tmpStream.str(); // allocates... yuck. - if(m_extraFlags & Flag_SpacePadPositive) + switch(*c) { - for(size_t i = 0, iend = result.size(); i < iend; ++i) - if(result[i] == '+') - result[i] = ' '; + case '\0': + out.write(fmt, c - fmt); + return c; + case '%': + out.write(fmt, c - fmt); + if(*(c+1) != '%') + return c; + // for "%%", tack trailing % onto next literal section. + fmt = ++c; + break; + default: + break; } - if((m_extraFlags & Flag_TruncateToPrecision) && - (int)result.size() > (int)m_out.precision()) - m_out.write(result.c_str(), m_out.precision()); - else - m_out << result; } - m_extraFlags = Flag_None; - m_fmt = fmtEnd; } @@ -663,13 +590,14 @@ void FormatIterator::accept(const T& value) // with the form "%[flags][width][.precision][length]type". // // Formatting options which can't be natively represented using the ostream -// state are returned in the extraFlags parameter which is a bitwise -// combination of values from the ExtraFormatFlags enum. -inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, - unsigned int& extraFlags, - const char* fmtStart, - int variableWidth, - int variablePrecision) +// state are returned in spacePadPositive (for space padded positive numbers) +// and ntrunc (for truncating conversions). argIndex is incremented if +// necessary to pull out variable width and precision . The function returns a +// pointer to the character after the end of the current format spec. +inline const char* streamStateFromFormat(std::ostream& out, bool& spacePadPositive, + int& ntrunc, const char* fmtStart, + const detail::FormatArg* formatters, + int& argIndex, int numFormatters) { if(*fmtStart != '%') { @@ -684,9 +612,9 @@ inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, out.unsetf(std::ios::adjustfield | std::ios::basefield | std::ios::floatfield | std::ios::showbase | std::ios::boolalpha | std::ios::showpoint | std::ios::showpos | std::ios::uppercase); - extraFlags = Flag_None; bool precisionSet = false; bool widthSet = false; + int widthExtra = 0; const char* c = fmtStart + 1; // 1) Parse flags for(;; ++c) @@ -713,12 +641,15 @@ inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, case ' ': // overridden by show positive sign, '+' flag. if(!(out.flags() & std::ios::showpos)) - extraFlags |= Flag_SpacePadPositive; + spacePadPositive = true; continue; case '+': out.setf(std::ios::showpos); - extraFlags &= ~Flag_SpacePadPositive; + spacePadPositive = false; + widthExtra = 1; continue; + default: + break; } break; } @@ -731,15 +662,19 @@ inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, if(*c == '*') { widthSet = true; - if(variableWidth < 0) + int width = 0; + if(argIndex < numFormatters) + width = formatters[argIndex++].toInt(); + else + TINYFORMAT_ERROR("tinyformat: Not enough arguments to read variable width"); + if(width < 0) { // negative widths correspond to '-' flag set out.fill(' '); out.setf(std::ios::left, std::ios::adjustfield); - variableWidth = -variableWidth; + width = -width; } - out.width(variableWidth); - extraFlags |= Flag_VariableWidth; + out.width(width); ++c; } // 3) Parse precision @@ -750,8 +685,10 @@ inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, if(*c == '*') { ++c; - extraFlags |= Flag_VariablePrecision; - precision = variablePrecision; + if(argIndex < numFormatters) + precision = formatters[argIndex++].toInt(); + else + TINYFORMAT_ERROR("tinyformat: Not enough arguments to read variable precision"); } else { @@ -783,23 +720,27 @@ inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, break; case 'X': out.setf(std::ios::uppercase); + // Falls through case 'x': case 'p': out.setf(std::ios::hex, std::ios::basefield); intConversion = true; break; case 'E': out.setf(std::ios::uppercase); + // Falls through case 'e': out.setf(std::ios::scientific, std::ios::floatfield); out.setf(std::ios::dec, std::ios::basefield); break; case 'F': out.setf(std::ios::uppercase); + // Falls through case 'f': out.setf(std::ios::fixed, std::ios::floatfield); break; case 'G': out.setf(std::ios::uppercase); + // Falls through case 'g': out.setf(std::ios::dec, std::ios::basefield); // As in boost::format, let stream decide float format. @@ -814,7 +755,7 @@ inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, break; case 's': if(precisionSet) - extraFlags |= Flag_TruncateToPrecision; + ntrunc = static_cast<int>(out.precision()); // Make %s print booleans as "true" and "false" out.setf(std::ios::boolalpha); break; @@ -826,6 +767,8 @@ inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, TINYFORMAT_ERROR("tinyformat: Conversion spec incorrectly " "terminated by end of string"); return c; + default: + break; } if(intConversion && precisionSet && !widthSet) { @@ -833,7 +776,7 @@ inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, // padded with zeros on the left). This isn't really supported by the // iostreams, but we can approximately simulate it with the width if // the width isn't otherwise used. - out.width(out.precision()); + out.width(out.precision() + widthExtra); out.setf(std::ios::internal, std::ios::adjustfield); out.fill('0'); } @@ -841,170 +784,282 @@ inline const char* FormatIterator::streamStateFromFormat(std::ostream& out, } - //------------------------------------------------------------------------------ -// Private format function on top of which the public interface is implemented. -// We enforce a mimimum of one value to be formatted to prevent bugs looking like -// -// const char* myStr = "100% broken"; -// printf(myStr); // Parses % as a format specifier -#ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES - -template<typename T1> -void format(FormatIterator& fmtIter, const T1& value1) +inline void formatImpl(std::ostream& out, const char* fmt, + const detail::FormatArg* formatters, + int numFormatters) { - fmtIter.accept(value1); - fmtIter.finish(); + // Saved stream state + std::streamsize origWidth = out.width(); + std::streamsize origPrecision = out.precision(); + std::ios::fmtflags origFlags = out.flags(); + char origFill = out.fill(); + + for (int argIndex = 0; argIndex < numFormatters; ++argIndex) + { + // Parse the format string + fmt = printFormatStringLiteral(out, fmt); + bool spacePadPositive = false; + int ntrunc = -1; + const char* fmtEnd = streamStateFromFormat(out, spacePadPositive, ntrunc, fmt, + formatters, argIndex, numFormatters); + if (argIndex >= numFormatters) + { + // Check args remain after reading any variable width/precision + TINYFORMAT_ERROR("tinyformat: Not enough format arguments"); + return; + } + const FormatArg& arg = formatters[argIndex]; + // Format the arg into the stream. + if(!spacePadPositive) + arg.format(out, fmt, fmtEnd, ntrunc); + else + { + // The following is a special case with no direct correspondence + // between stream formatting and the printf() behaviour. Simulate + // it crudely by formatting into a temporary string stream and + // munging the resulting string. + std::ostringstream tmpStream; + tmpStream.copyfmt(out); + tmpStream.setf(std::ios::showpos); + arg.format(tmpStream, fmt, fmtEnd, ntrunc); + std::string result = tmpStream.str(); // allocates... yuck. + for(size_t i = 0, iend = result.size(); i < iend; ++i) + if(result[i] == '+') result[i] = ' '; + out << result; + } + fmt = fmtEnd; + } + + // Print remaining part of format string. + fmt = printFormatStringLiteral(out, fmt); + if(*fmt != '\0') + TINYFORMAT_ERROR("tinyformat: Too many conversion specifiers in format string"); + + // Restore stream state + out.width(origWidth); + out.precision(origPrecision); + out.flags(origFlags); + out.fill(origFill); } -// General version for C++11 -template<typename T1, typename... Args> -void format(FormatIterator& fmtIter, const T1& value1, const Args&... args) +} // namespace detail + + +/// List of template arguments format(), held in a type-opaque way. +/// +/// A const reference to FormatList (typedef'd as FormatListRef) may be +/// conveniently used to pass arguments to non-template functions: All type +/// information has been stripped from the arguments, leaving just enough of a +/// common interface to perform formatting as required. +class FormatList { - fmtIter.accept(value1); - format(fmtIter, args...); -} + public: + FormatList(detail::FormatArg* formatters, int N) + : m_formatters(formatters), m_N(N) { } -#else + friend void vformat(std::ostream& out, const char* fmt, + const FormatList& list); -inline void format(FormatIterator& fmtIter) + private: + const detail::FormatArg* m_formatters; + int m_N; +}; + +/// Reference to type-opaque format list for passing to vformat() +typedef const FormatList& FormatListRef; + + +namespace detail { + +// Format list subclass with fixed storage to avoid dynamic allocation +template<int N> +class FormatListN : public FormatList { - fmtIter.finish(); -} + public: +#ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES + template<typename... Args> + explicit FormatListN(const Args&... args) + : FormatList(&m_formatterStore[0], N), + m_formatterStore { FormatArg(args)... } + { static_assert(sizeof...(args) == N, "Number of args must be N"); } +#else // C++98 version + void init(int) {} +# define TINYFORMAT_MAKE_FORMATLIST_CONSTRUCTOR(n) \ + \ + template<TINYFORMAT_ARGTYPES(n)> \ + explicit FormatListN(TINYFORMAT_VARARGS(n)) \ + : FormatList(&m_formatterStore[0], n) \ + { assert(n == N); init(0, TINYFORMAT_PASSARGS(n)); } \ + \ + template<TINYFORMAT_ARGTYPES(n)> \ + void init(int i, TINYFORMAT_VARARGS(n)) \ + { \ + m_formatterStore[i] = FormatArg(v1); \ + init(i+1 TINYFORMAT_PASSARGS_TAIL(n)); \ + } -// General version for C++98 -#define TINYFORMAT_MAKE_FORMAT_DETAIL(n) \ -template<TINYFORMAT_ARGTYPES(n)> \ -void format(detail::FormatIterator& fmtIter, TINYFORMAT_VARARGS(n)) \ -{ \ - fmtIter.accept(v1); \ - format(fmtIter TINYFORMAT_PASSARGS_TAIL(n)); \ -} + TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_FORMATLIST_CONSTRUCTOR) +# undef TINYFORMAT_MAKE_FORMATLIST_CONSTRUCTOR +#endif -TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_FORMAT_DETAIL) -#undef TINYFORMAT_MAKE_FORMAT_DETAIL + private: + FormatArg m_formatterStore[N]; +}; -#endif // End C++98 variadic template emulation for format() +// Special 0-arg version - MSVC says zero-sized C array in struct is nonstandard +template<> class FormatListN<0> : public FormatList +{ + public: FormatListN() : FormatList(0, 0) {} +}; } // namespace detail //------------------------------------------------------------------------------ -// Implement all the main interface functions here in terms of detail::format() +// Primary API functions #ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES -// C++11 - the simple case -template<typename T1, typename... Args> -void format(std::ostream& out, const char* fmt, const T1& v1, const Args&... args) +/// Make type-agnostic format list from list of template arguments. +/// +/// The exact return type of this function is an implementation detail and +/// shouldn't be relied upon. Instead it should be stored as a FormatListRef: +/// +/// FormatListRef formatList = makeFormatList( /*...*/ ); +template<typename... Args> +detail::FormatListN<sizeof...(Args)> makeFormatList(const Args&... args) +{ + return detail::FormatListN<sizeof...(args)>(args...); +} + +#else // C++98 version + +inline detail::FormatListN<0> makeFormatList() { - detail::FormatIterator fmtIter(out, fmt); - format(fmtIter, v1, args...); + return detail::FormatListN<0>(); +} +#define TINYFORMAT_MAKE_MAKEFORMATLIST(n) \ +template<TINYFORMAT_ARGTYPES(n)> \ +detail::FormatListN<n> makeFormatList(TINYFORMAT_VARARGS(n)) \ +{ \ + return detail::FormatListN<n>(TINYFORMAT_PASSARGS(n)); \ } +TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_MAKEFORMATLIST) +#undef TINYFORMAT_MAKE_MAKEFORMATLIST + +#endif -template<typename T1, typename... Args> -std::string format(const char* fmt, const T1& v1, const Args&... args) +/// Format list of arguments to the stream according to the given format string. +/// +/// The name vformat() is chosen for the semantic similarity to vprintf(): the +/// list of format arguments is held in a single function argument. +inline void vformat(std::ostream& out, const char* fmt, FormatListRef list) +{ + detail::formatImpl(out, fmt, list.m_formatters, list.m_N); +} + + +#ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES + +/// Format list of arguments to the stream according to given format string. +template<typename... Args> +void format(std::ostream& out, const char* fmt, const Args&... args) +{ + vformat(out, fmt, makeFormatList(args...)); +} + +/// Format list of arguments according to the given format string and return +/// the result as a string. +template<typename... Args> +std::string format(const char* fmt, const Args&... args) { std::ostringstream oss; - format(oss, fmt, v1, args...); + format(oss, fmt, args...); return oss.str(); } -template<typename T1, typename... Args> -std::string format(const std::string &fmt, const T1& v1, const Args&... args) +/// Format list of arguments to std::cout, according to the given format string +template<typename... Args> +void printf(const char* fmt, const Args&... args) +{ + format(std::cout, fmt, args...); +} + +template<typename... Args> +void printfln(const char* fmt, const Args&... args) +{ + format(std::cout, fmt, args...); + std::cout << '\n'; +} + +#else // C++98 version + +inline void format(std::ostream& out, const char* fmt) +{ + vformat(out, fmt, makeFormatList()); +} + +inline std::string format(const char* fmt) { std::ostringstream oss; - format(oss, fmt.c_str(), v1, args...); + format(oss, fmt); return oss.str(); } -template<typename T1, typename... Args> -void printf(const char* fmt, const T1& v1, const Args&... args) +inline void printf(const char* fmt) { - format(std::cout, fmt, v1, args...); + format(std::cout, fmt); } -#else +inline void printfln(const char* fmt) +{ + format(std::cout, fmt); + std::cout << '\n'; +} -// C++98 - define the interface functions using the wrapping macros #define TINYFORMAT_MAKE_FORMAT_FUNCS(n) \ \ template<TINYFORMAT_ARGTYPES(n)> \ void format(std::ostream& out, const char* fmt, TINYFORMAT_VARARGS(n)) \ { \ - tinyformat::detail::FormatIterator fmtIter(out, fmt); \ - tinyformat::detail::format(fmtIter, TINYFORMAT_PASSARGS(n)); \ + vformat(out, fmt, makeFormatList(TINYFORMAT_PASSARGS(n))); \ } \ \ template<TINYFORMAT_ARGTYPES(n)> \ std::string format(const char* fmt, TINYFORMAT_VARARGS(n)) \ { \ std::ostringstream oss; \ - tinyformat::format(oss, fmt, TINYFORMAT_PASSARGS(n)); \ + format(oss, fmt, TINYFORMAT_PASSARGS(n)); \ return oss.str(); \ } \ \ template<TINYFORMAT_ARGTYPES(n)> \ -std::string format(const std::string &fmt, TINYFORMAT_VARARGS(n)) \ +void printf(const char* fmt, TINYFORMAT_VARARGS(n)) \ { \ - std::ostringstream oss; \ - tinyformat::format(oss, fmt.c_str(), TINYFORMAT_PASSARGS(n)); \ - return oss.str(); \ + format(std::cout, fmt, TINYFORMAT_PASSARGS(n)); \ } \ \ template<TINYFORMAT_ARGTYPES(n)> \ -void printf(const char* fmt, TINYFORMAT_VARARGS(n)) \ +void printfln(const char* fmt, TINYFORMAT_VARARGS(n)) \ { \ - tinyformat::format(std::cout, fmt, TINYFORMAT_PASSARGS(n)); \ + format(std::cout, fmt, TINYFORMAT_PASSARGS(n)); \ + std::cout << '\n'; \ } TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_FORMAT_FUNCS) #undef TINYFORMAT_MAKE_FORMAT_FUNCS -#endif - -//------------------------------------------------------------------------------ -// Define deprecated wrapping macro for backward compatibility in tinyformat -// 1.x. Will be removed in version 2! -#define TINYFORMAT_WRAP_FORMAT_EXTRA_ARGS -#define TINYFORMAT_WRAP_FORMAT_N(n, returnType, funcName, funcDeclSuffix, \ - bodyPrefix, streamName, bodySuffix) \ -template<TINYFORMAT_ARGTYPES(n)> \ -returnType funcName(TINYFORMAT_WRAP_FORMAT_EXTRA_ARGS const char* fmt, \ - TINYFORMAT_VARARGS(n)) funcDeclSuffix \ -{ \ - bodyPrefix \ - tinyformat::format(streamName, fmt, TINYFORMAT_PASSARGS(n)); \ - bodySuffix \ -} \ - -#define TINYFORMAT_WRAP_FORMAT(returnType, funcName, funcDeclSuffix, \ - bodyPrefix, streamName, bodySuffix) \ -inline \ -returnType funcName(TINYFORMAT_WRAP_FORMAT_EXTRA_ARGS const char* fmt \ - ) funcDeclSuffix \ -{ \ - bodyPrefix \ - tinyformat::detail::FormatIterator(streamName, fmt).finish(); \ - bodySuffix \ -} \ -TINYFORMAT_WRAP_FORMAT_N(1 , returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(2 , returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(3 , returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(4 , returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(5 , returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(6 , returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(7 , returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(8 , returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(9 , returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(10, returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(11, returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(12, returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(13, returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(14, returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(15, returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ -TINYFORMAT_WRAP_FORMAT_N(16, returnType, funcName, funcDeclSuffix, bodyPrefix, streamName, bodySuffix) \ +#endif +// Added for Bitcoin Core +template<typename... Args> +std::string format(const std::string &fmt, const Args&... args) +{ + std::ostringstream oss; + format(oss, fmt.c_str(), args...); + return oss.str(); +} } // namespace tinyformat |