1 : //
2 : // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
3 : // Use of this source code is governed by a BSD-style license that can be
4 : // found in the LICENSE file.
5 : //
6 :
7 : #ifndef _INFOSINK_INCLUDED_
8 : #define _INFOSINK_INCLUDED_
9 :
10 : #include <math.h>
11 : #include "compiler/Common.h"
12 :
13 : // Returns the fractional part of the given floating-point number.
14 0 : inline float fractionalPart(float f) {
15 0 : float intPart = 0.0f;
16 0 : return modff(f, &intPart);
17 : }
18 :
19 : //
20 : // TPrefixType is used to centralize how info log messages start.
21 : // See below.
22 : //
23 : enum TPrefixType {
24 : EPrefixNone,
25 : EPrefixWarning,
26 : EPrefixError,
27 : EPrefixInternalError,
28 : EPrefixUnimplemented,
29 : EPrefixNote
30 : };
31 :
32 : //
33 : // Encapsulate info logs for all objects that have them.
34 : //
35 : // The methods are a general set of tools for getting a variety of
36 : // messages and types inserted into the log.
37 : //
38 0 : class TInfoSinkBase {
39 : public:
40 0 : TInfoSinkBase() {}
41 :
42 : template <typename T>
43 0 : TInfoSinkBase& operator<<(const T& t) {
44 0 : TPersistStringStream stream;
45 0 : stream << t;
46 0 : sink.append(stream.str());
47 0 : return *this;
48 : }
49 : // Override << operator for specific types. It is faster to append strings
50 : // and characters directly to the sink.
51 : TInfoSinkBase& operator<<(char c) {
52 : sink.append(1, c);
53 : return *this;
54 : }
55 0 : TInfoSinkBase& operator<<(const char* str) {
56 0 : sink.append(str);
57 0 : return *this;
58 : }
59 : TInfoSinkBase& operator<<(const TPersistString& str) {
60 : sink.append(str);
61 : return *this;
62 : }
63 0 : TInfoSinkBase& operator<<(const TString& str) {
64 0 : sink.append(str.c_str());
65 0 : return *this;
66 : }
67 : // Make sure floats are written with correct precision.
68 0 : TInfoSinkBase& operator<<(float f) {
69 : // Make sure that at least one decimal point is written. If a number
70 : // does not have a fractional part, the default precision format does
71 : // not write the decimal portion which gets interpreted as integer by
72 : // the compiler.
73 0 : TPersistStringStream stream;
74 0 : if (fractionalPart(f) == 0.0f) {
75 0 : stream.precision(1);
76 0 : stream << std::showpoint << std::fixed << f;
77 : } else {
78 0 : stream.unsetf(std::ios::fixed);
79 0 : stream.unsetf(std::ios::scientific);
80 0 : stream.precision(8);
81 0 : stream << f;
82 : }
83 0 : sink.append(stream.str());
84 0 : return *this;
85 : }
86 : // Write boolean values as their names instead of integral value.
87 0 : TInfoSinkBase& operator<<(bool b) {
88 0 : const char* str = b ? "true" : "false";
89 0 : sink.append(str);
90 0 : return *this;
91 : }
92 :
93 0 : void erase() { sink.clear(); }
94 0 : int size() { return static_cast<int>(sink.size()); }
95 :
96 : const TPersistString& str() const { return sink; }
97 0 : const char* c_str() const { return sink.c_str(); }
98 :
99 : void prefix(TPrefixType message);
100 : void location(TSourceLoc loc);
101 : void message(TPrefixType message, const char* s);
102 : void message(TPrefixType message, const char* s, TSourceLoc loc);
103 :
104 : private:
105 : TPersistString sink;
106 : };
107 :
108 0 : class TInfoSink {
109 : public:
110 : TInfoSinkBase info;
111 : TInfoSinkBase debug;
112 : TInfoSinkBase obj;
113 : };
114 :
115 : #endif // _INFOSINK_INCLUDED_
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