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Diffstat (limited to 'src/3rdparty/glslang/glslang/Include/arrays.h')
| -rw-r--r-- | src/3rdparty/glslang/glslang/Include/arrays.h | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/src/3rdparty/glslang/glslang/Include/arrays.h b/src/3rdparty/glslang/glslang/Include/arrays.h new file mode 100644 index 0000000..7f047d9 --- /dev/null +++ b/src/3rdparty/glslang/glslang/Include/arrays.h @@ -0,0 +1,341 @@ +// +// Copyright (C) 2002-2005 3Dlabs Inc. Ltd. +// Copyright (C) 2012-2013 LunarG, Inc. +// +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions +// are met: +// +// Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// +// Neither the name of 3Dlabs Inc. Ltd. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +// POSSIBILITY OF SUCH DAMAGE. +// + +// +// Implement types for tracking GLSL arrays, arrays of arrays, etc. +// + +#ifndef _ARRAYS_INCLUDED +#define _ARRAYS_INCLUDED + +#include <algorithm> + +namespace glslang { + +// This is used to mean there is no size yet (unsized), it is waiting to get a size from somewhere else. +const int UnsizedArraySize = 0; + +class TIntermTyped; +extern bool SameSpecializationConstants(TIntermTyped*, TIntermTyped*); + +// Specialization constants need both a nominal size and a node that defines +// the specialization constant being used. Array types are the same when their +// size and specialization constant nodes are the same. +struct TArraySize { + unsigned int size; + TIntermTyped* node; // nullptr means no specialization constant node + bool operator==(const TArraySize& rhs) const + { + if (size != rhs.size) + return false; + if (node == nullptr || rhs.node == nullptr) + return node == rhs.node; + + return SameSpecializationConstants(node, rhs.node); + } +}; + +// +// TSmallArrayVector is used as the container for the set of sizes in TArraySizes. +// It has generic-container semantics, while TArraySizes has array-of-array semantics. +// That is, TSmallArrayVector should be more focused on mechanism and TArraySizes on policy. +// +struct TSmallArrayVector { + // + // TODO: memory: TSmallArrayVector is intended to be smaller. + // Almost all arrays could be handled by two sizes each fitting + // in 16 bits, needing a real vector only in the cases where there + // are more than 3 sizes or a size needing more than 16 bits. + // + POOL_ALLOCATOR_NEW_DELETE(GetThreadPoolAllocator()) + + TSmallArrayVector() : sizes(nullptr) { } + virtual ~TSmallArrayVector() { dealloc(); } + + // For breaking into two non-shared copies, independently modifiable. + TSmallArrayVector& operator=(const TSmallArrayVector& from) + { + if (from.sizes == nullptr) + sizes = nullptr; + else { + alloc(); + *sizes = *from.sizes; + } + + return *this; + } + + int size() const + { + if (sizes == nullptr) + return 0; + return (int)sizes->size(); + } + + unsigned int frontSize() const + { + assert(sizes != nullptr && sizes->size() > 0); + return sizes->front().size; + } + + TIntermTyped* frontNode() const + { + assert(sizes != nullptr && sizes->size() > 0); + return sizes->front().node; + } + + void changeFront(unsigned int s) + { + assert(sizes != nullptr); + // this should only happen for implicitly sized arrays, not specialization constants + assert(sizes->front().node == nullptr); + sizes->front().size = s; + } + + void push_back(unsigned int e, TIntermTyped* n) + { + alloc(); + TArraySize pair = { e, n }; + sizes->push_back(pair); + } + + void push_back(const TSmallArrayVector& newDims) + { + alloc(); + sizes->insert(sizes->end(), newDims.sizes->begin(), newDims.sizes->end()); + } + + void pop_front() + { + assert(sizes != nullptr && sizes->size() > 0); + if (sizes->size() == 1) + dealloc(); + else + sizes->erase(sizes->begin()); + } + + // 'this' should currently not be holding anything, and copyNonFront + // will make it hold a copy of all but the first element of rhs. + // (This would be useful for making a type that is dereferenced by + // one dimension.) + void copyNonFront(const TSmallArrayVector& rhs) + { + assert(sizes == nullptr); + if (rhs.size() > 1) { + alloc(); + sizes->insert(sizes->begin(), rhs.sizes->begin() + 1, rhs.sizes->end()); + } + } + + unsigned int getDimSize(int i) const + { + assert(sizes != nullptr && (int)sizes->size() > i); + return (*sizes)[i].size; + } + + void setDimSize(int i, unsigned int size) const + { + assert(sizes != nullptr && (int)sizes->size() > i); + assert((*sizes)[i].node == nullptr); + (*sizes)[i].size = size; + } + + TIntermTyped* getDimNode(int i) const + { + assert(sizes != nullptr && (int)sizes->size() > i); + return (*sizes)[i].node; + } + + bool operator==(const TSmallArrayVector& rhs) const + { + if (sizes == nullptr && rhs.sizes == nullptr) + return true; + if (sizes == nullptr || rhs.sizes == nullptr) + return false; + return *sizes == *rhs.sizes; + } + bool operator!=(const TSmallArrayVector& rhs) const { return ! operator==(rhs); } + +protected: + TSmallArrayVector(const TSmallArrayVector&); + + void alloc() + { + if (sizes == nullptr) + sizes = new TVector<TArraySize>; + } + void dealloc() + { + delete sizes; + sizes = nullptr; + } + + TVector<TArraySize>* sizes; // will either hold such a pointer, or in the future, hold the two array sizes +}; + +// +// Represent an array, or array of arrays, to arbitrary depth. This is not +// done through a hierarchy of types in a type tree, rather all contiguous arrayness +// in the type hierarchy is localized into this single cumulative object. +// +// The arrayness in TTtype is a pointer, so that it can be non-allocated and zero +// for the vast majority of types that are non-array types. +// +// Order Policy: these are all identical: +// - left to right order within a contiguous set of ...[..][..][..]... in the source language +// - index order 0, 1, 2, ... within the 'sizes' member below +// - outer-most to inner-most +// +struct TArraySizes { + POOL_ALLOCATOR_NEW_DELETE(GetThreadPoolAllocator()) + + TArraySizes() : implicitArraySize(1), variablyIndexed(false) { } + + // For breaking into two non-shared copies, independently modifiable. + TArraySizes& operator=(const TArraySizes& from) + { + implicitArraySize = from.implicitArraySize; + variablyIndexed = from.variablyIndexed; + sizes = from.sizes; + + return *this; + } + + // translate from array-of-array semantics to container semantics + int getNumDims() const { return sizes.size(); } + int getDimSize(int dim) const { return sizes.getDimSize(dim); } + TIntermTyped* getDimNode(int dim) const { return sizes.getDimNode(dim); } + void setDimSize(int dim, int size) { sizes.setDimSize(dim, size); } + int getOuterSize() const { return sizes.frontSize(); } + TIntermTyped* getOuterNode() const { return sizes.frontNode(); } + int getCumulativeSize() const + { + int size = 1; + for (int d = 0; d < sizes.size(); ++d) { + // this only makes sense in paths that have a known array size + assert(sizes.getDimSize(d) != UnsizedArraySize); + size *= sizes.getDimSize(d); + } + return size; + } + void addInnerSize() { addInnerSize((unsigned)UnsizedArraySize); } + void addInnerSize(int s) { addInnerSize((unsigned)s, nullptr); } + void addInnerSize(int s, TIntermTyped* n) { sizes.push_back((unsigned)s, n); } + void addInnerSize(TArraySize pair) { + sizes.push_back(pair.size, pair.node); + } + void addInnerSizes(const TArraySizes& s) { sizes.push_back(s.sizes); } + void changeOuterSize(int s) { sizes.changeFront((unsigned)s); } + int getImplicitSize() const { return implicitArraySize; } + void updateImplicitSize(int s) { implicitArraySize = std::max(implicitArraySize, s); } + bool isInnerUnsized() const + { + for (int d = 1; d < sizes.size(); ++d) { + if (sizes.getDimSize(d) == (unsigned)UnsizedArraySize) + return true; + } + + return false; + } + bool clearInnerUnsized() + { + for (int d = 1; d < sizes.size(); ++d) { + if (sizes.getDimSize(d) == (unsigned)UnsizedArraySize) + setDimSize(d, 1); + } + + return false; + } + bool isInnerSpecialization() const + { + for (int d = 1; d < sizes.size(); ++d) { + if (sizes.getDimNode(d) != nullptr) + return true; + } + + return false; + } + bool isOuterSpecialization() + { + return sizes.getDimNode(0) != nullptr; + } + + bool hasUnsized() const { return getOuterSize() == UnsizedArraySize || isInnerUnsized(); } + bool isSized() const { return getOuterSize() != UnsizedArraySize; } + void dereference() { sizes.pop_front(); } + void copyDereferenced(const TArraySizes& rhs) + { + assert(sizes.size() == 0); + if (rhs.sizes.size() > 1) + sizes.copyNonFront(rhs.sizes); + } + + bool sameInnerArrayness(const TArraySizes& rhs) const + { + if (sizes.size() != rhs.sizes.size()) + return false; + + for (int d = 1; d < sizes.size(); ++d) { + if (sizes.getDimSize(d) != rhs.sizes.getDimSize(d) || + sizes.getDimNode(d) != rhs.sizes.getDimNode(d)) + return false; + } + + return true; + } + + void setVariablyIndexed() { variablyIndexed = true; } + bool isVariablyIndexed() const { return variablyIndexed; } + + bool operator==(const TArraySizes& rhs) const { return sizes == rhs.sizes; } + bool operator!=(const TArraySizes& rhs) const { return sizes != rhs.sizes; } + +protected: + TSmallArrayVector sizes; + + TArraySizes(const TArraySizes&); + + // For tracking maximum referenced compile-time constant index. + // Applies only to the outer-most dimension. Potentially becomes + // the implicit size of the array, if not variably indexed and + // otherwise legal. + int implicitArraySize; + bool variablyIndexed; // true if array is indexed with a non compile-time constant +}; + +} // end namespace glslang + +#endif // _ARRAYS_INCLUDED_ |