michael@0: //
michael@0: // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: //
michael@0: 
michael@0: #ifndef _INFOSINK_INCLUDED_
michael@0: #define _INFOSINK_INCLUDED_
michael@0: 
michael@0: #include <math.h>
michael@0: #include "compiler/Common.h"
michael@0: 
michael@0: // Returns the fractional part of the given floating-point number.
michael@0: inline float fractionalPart(float f) {
michael@0:   float intPart = 0.0f;
michael@0:   return modff(f, &intPart);
michael@0: }
michael@0: 
michael@0: //
michael@0: // TPrefixType is used to centralize how info log messages start.
michael@0: // See below.
michael@0: //
michael@0: enum TPrefixType {
michael@0:     EPrefixNone,
michael@0:     EPrefixWarning,
michael@0:     EPrefixError,
michael@0:     EPrefixInternalError,
michael@0:     EPrefixUnimplemented,
michael@0:     EPrefixNote
michael@0: };
michael@0: 
michael@0: //
michael@0: // Encapsulate info logs for all objects that have them.
michael@0: //
michael@0: // The methods are a general set of tools for getting a variety of
michael@0: // messages and types inserted into the log.
michael@0: //
michael@0: class TInfoSinkBase {
michael@0: public:
michael@0:     TInfoSinkBase() {}
michael@0: 
michael@0:     template <typename T>
michael@0:     TInfoSinkBase& operator<<(const T& t) {
michael@0:         TPersistStringStream stream;
michael@0:         stream << t;
michael@0:         sink.append(stream.str());
michael@0:         return *this;
michael@0:     }
michael@0:     // Override << operator for specific types. It is faster to append strings
michael@0:     // and characters directly to the sink.
michael@0:     TInfoSinkBase& operator<<(char c) {
michael@0:         sink.append(1, c);
michael@0:         return *this;
michael@0:     }
michael@0:     TInfoSinkBase& operator<<(const char* str) {
michael@0:         sink.append(str);
michael@0:         return *this;
michael@0:     }
michael@0:     TInfoSinkBase& operator<<(const TPersistString& str) {
michael@0:         sink.append(str);
michael@0:         return *this;
michael@0:     }
michael@0:     TInfoSinkBase& operator<<(const TString& str) {
michael@0:         sink.append(str.c_str());
michael@0:         return *this;
michael@0:     }
michael@0:     // Make sure floats are written with correct precision.
michael@0:     TInfoSinkBase& operator<<(float f) {
michael@0:         // Make sure that at least one decimal point is written. If a number
michael@0:         // does not have a fractional part, the default precision format does
michael@0:         // not write the decimal portion which gets interpreted as integer by
michael@0:         // the compiler.
michael@0:         TPersistStringStream stream;
michael@0:         if (fractionalPart(f) == 0.0f) {
michael@0:             stream.precision(1);
michael@0:             stream << std::showpoint << std::fixed << f;
michael@0:         } else {
michael@0:             stream.unsetf(std::ios::fixed);
michael@0:             stream.unsetf(std::ios::scientific);
michael@0:             stream.precision(8);
michael@0:             stream << f;
michael@0:         }
michael@0:         sink.append(stream.str());
michael@0:         return *this;
michael@0:     }
michael@0:     // Write boolean values as their names instead of integral value.
michael@0:     TInfoSinkBase& operator<<(bool b) {
michael@0:         const char* str = b ? "true" : "false";
michael@0:         sink.append(str);
michael@0:         return *this;
michael@0:     }
michael@0: 
michael@0:     void erase() { sink.clear(); }
michael@0:     int size() { return static_cast<int>(sink.size()); }
michael@0: 
michael@0:     const TPersistString& str() const { return sink; }
michael@0:     const char* c_str() const { return sink.c_str(); }
michael@0: 
michael@0:     void prefix(TPrefixType p);
michael@0:     void location(int file, int line);
michael@0:     void location(const TSourceLoc& loc);
michael@0:     void message(TPrefixType p, const TSourceLoc& loc, const char* m);
michael@0: 
michael@0: private:
michael@0:     TPersistString sink;
michael@0: };
michael@0: 
michael@0: class TInfoSink {
michael@0: public:
michael@0:     TInfoSinkBase info;
michael@0:     TInfoSinkBase debug;
michael@0:     TInfoSinkBase obj;
michael@0: };
michael@0: 
michael@0: #endif // _INFOSINK_INCLUDED_