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 _COMMON_INCLUDED_
8 : #define _COMMON_INCLUDED_
9 :
10 : #include <map>
11 : #include <sstream>
12 : #include <string>
13 : #include <vector>
14 :
15 : #include "compiler/PoolAlloc.h"
16 :
17 : // We need two pieces of information to report errors/warnings - string and
18 : // line number. We encode these into a single int so that it can be easily
19 : // incremented/decremented by lexer. The right SOURCE_LOC_LINE_SIZE bits store
20 : // line number while the rest store the string number. Since the shaders are
21 : // usually small, we should not run out of memory. SOURCE_LOC_LINE_SIZE
22 : // can be increased to alleviate this issue.
23 : typedef int TSourceLoc;
24 : const unsigned int SOURCE_LOC_LINE_SIZE = 16; // in bits.
25 : const unsigned int SOURCE_LOC_LINE_MASK = (1 << SOURCE_LOC_LINE_SIZE) - 1;
26 :
27 0 : inline TSourceLoc EncodeSourceLoc(int string, int line) {
28 0 : return (string << SOURCE_LOC_LINE_SIZE) | (line & SOURCE_LOC_LINE_MASK);
29 : }
30 :
31 0 : inline void DecodeSourceLoc(TSourceLoc loc, int* string, int* line) {
32 0 : if (string) *string = loc >> SOURCE_LOC_LINE_SIZE;
33 0 : if (line) *line = loc & SOURCE_LOC_LINE_MASK;
34 0 : }
35 :
36 : //
37 : // Put POOL_ALLOCATOR_NEW_DELETE in base classes to make them use this scheme.
38 : //
39 : #define POOL_ALLOCATOR_NEW_DELETE(A) \
40 : void* operator new(size_t s) { return (A).allocate(s); } \
41 : void* operator new(size_t, void *_Where) { return (_Where); } \
42 : void operator delete(void*) { } \
43 : void operator delete(void *, void *) { } \
44 : void* operator new[](size_t s) { return (A).allocate(s); } \
45 : void* operator new[](size_t, void *_Where) { return (_Where); } \
46 : void operator delete[](void*) { } \
47 : void operator delete[](void *, void *) { }
48 :
49 : //
50 : // Pool version of string.
51 : //
52 : typedef pool_allocator<char> TStringAllocator;
53 : typedef std::basic_string <char, std::char_traits<char>, TStringAllocator> TString;
54 : typedef std::basic_ostringstream<char, std::char_traits<char>, TStringAllocator> TStringStream;
55 0 : inline TString* NewPoolTString(const char* s)
56 : {
57 0 : void* memory = GlobalPoolAllocator.allocate(sizeof(TString));
58 0 : return new(memory) TString(s);
59 : }
60 :
61 : //
62 : // Persistent string memory. Should only be used for strings that survive
63 : // across compiles.
64 : //
65 : #define TPersistString std::string
66 : #define TPersistStringStream std::ostringstream
67 :
68 : //
69 : // Pool allocator versions of vectors, lists, and maps
70 : //
71 0 : template <class T> class TVector : public std::vector<T, pool_allocator<T> > {
72 : public:
73 : typedef typename std::vector<T, pool_allocator<T> >::size_type size_type;
74 0 : TVector() : std::vector<T, pool_allocator<T> >() {}
75 : TVector(const pool_allocator<T>& a) : std::vector<T, pool_allocator<T> >(a) {}
76 : TVector(size_type i): std::vector<T, pool_allocator<T> >(i) {}
77 : };
78 :
79 : template <class K, class D, class CMP = std::less<K> >
80 0 : class TMap : public std::map<K, D, CMP, pool_allocator<std::pair<const K, D> > > {
81 : public:
82 : typedef pool_allocator<std::pair<const K, D> > tAllocator;
83 :
84 0 : TMap() : std::map<K, D, CMP, tAllocator>() {}
85 : // use correct two-stage name lookup supported in gcc 3.4 and above
86 : TMap(const tAllocator& a) : std::map<K, D, CMP, tAllocator>(std::map<K, D, CMP, tAllocator>::key_compare(), a) {}
87 : };
88 :
89 : #endif // _COMMON_INCLUDED_
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