1 //
2 // Copyright 2011 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 #include "compiler/preprocessor/Preprocessor.h"
8
9 #include "common/debug.h"
10 #include "compiler/preprocessor/DiagnosticsBase.h"
11 #include "compiler/preprocessor/DirectiveParser.h"
12 #include "compiler/preprocessor/Macro.h"
13 #include "compiler/preprocessor/MacroExpander.h"
14 #include "compiler/preprocessor/Token.h"
15 #include "compiler/preprocessor/Tokenizer.h"
16
17 namespace angle
18 {
19
20 namespace pp
21 {
22
23 struct PreprocessorImpl
24 {
25 Diagnostics *diagnostics;
26 MacroSet macroSet;
27 Tokenizer tokenizer;
28 DirectiveParser directiveParser;
29 MacroExpander macroExpander;
30
PreprocessorImplangle::pp::PreprocessorImpl31 PreprocessorImpl(Diagnostics *diag,
32 DirectiveHandler *directiveHandler,
33 const PreprocessorSettings &settings)
34 : diagnostics(diag),
35 tokenizer(diag),
36 directiveParser(&tokenizer, ¯oSet, diag, directiveHandler, settings),
37 macroExpander(&directiveParser, ¯oSet, diag, settings, false)
38 {}
39 };
40
Preprocessor(Diagnostics * diagnostics,DirectiveHandler * directiveHandler,const PreprocessorSettings & settings)41 Preprocessor::Preprocessor(Diagnostics *diagnostics,
42 DirectiveHandler *directiveHandler,
43 const PreprocessorSettings &settings)
44 {
45 mImpl = new PreprocessorImpl(diagnostics, directiveHandler, settings);
46 }
47
~Preprocessor()48 Preprocessor::~Preprocessor()
49 {
50 delete mImpl;
51 }
52
init(size_t count,const char * const string[],const int length[])53 bool Preprocessor::init(size_t count, const char *const string[], const int length[])
54 {
55 static const int kDefaultGLSLVersion = 100;
56
57 // Add standard pre-defined macros.
58 predefineMacro("__LINE__", 0);
59 predefineMacro("__FILE__", 0);
60 predefineMacro("__VERSION__", kDefaultGLSLVersion);
61 predefineMacro("GL_ES", 1);
62
63 return mImpl->tokenizer.init(count, string, length);
64 }
65
predefineMacro(const char * name,int value)66 void Preprocessor::predefineMacro(const char *name, int value)
67 {
68 PredefineMacro(&mImpl->macroSet, name, value);
69 }
70
lex(Token * token)71 void Preprocessor::lex(Token *token)
72 {
73 bool validToken = false;
74 while (!validToken)
75 {
76 mImpl->macroExpander.lex(token);
77 switch (token->type)
78 {
79 // We should not be returning internal preprocessing tokens.
80 // Convert preprocessing tokens to compiler tokens or report
81 // diagnostics.
82 case Token::PP_HASH:
83 UNREACHABLE();
84 break;
85 case Token::PP_NUMBER:
86 mImpl->diagnostics->report(Diagnostics::PP_INVALID_NUMBER, token->location,
87 token->text);
88 break;
89 case Token::PP_OTHER:
90 mImpl->diagnostics->report(Diagnostics::PP_INVALID_CHARACTER, token->location,
91 token->text);
92 break;
93 default:
94 validToken = true;
95 break;
96 }
97 }
98 }
99
setMaxTokenSize(size_t maxTokenSize)100 void Preprocessor::setMaxTokenSize(size_t maxTokenSize)
101 {
102 mImpl->tokenizer.setMaxTokenSize(maxTokenSize);
103 }
104
105 } // namespace pp
106
107 } // namespace angle
108