mirror of
https://github.com/RetroDECK/Duckstation.git
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103 lines
3.2 KiB
C++
103 lines
3.2 KiB
C++
// Copyright 2017, VIXL authors
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of ARM Limited nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "code-buffer-vixl.h"
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#include "utils-vixl.h"
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namespace vixl {
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CodeBuffer::CodeBuffer() : buffer_(nullptr), cursor_(nullptr), dirty_(false), capacity_(0)
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{
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}
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CodeBuffer::CodeBuffer(byte* buffer, size_t capacity)
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: buffer_(reinterpret_cast<byte*>(buffer)),
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cursor_(reinterpret_cast<byte*>(buffer)),
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dirty_(false),
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capacity_(capacity) {
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VIXL_ASSERT(buffer_ != NULL);
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}
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CodeBuffer::~CodeBuffer() VIXL_NEGATIVE_TESTING_ALLOW_EXCEPTION {
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VIXL_ASSERT(!IsDirty());
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}
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void CodeBuffer::EmitString(const char* string) {
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const auto len = strlen(string) + 1;
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VIXL_ASSERT(HasSpaceFor(len));
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char* dst = reinterpret_cast<char*>(cursor_);
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dirty_ = true;
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memcpy(dst, string, len);
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cursor_ = reinterpret_cast<byte*>(dst + len);
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}
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void CodeBuffer::EmitData(const void* data, size_t size) {
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VIXL_ASSERT(HasSpaceFor(size));
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dirty_ = true;
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memcpy(cursor_, data, size);
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cursor_ = cursor_ + size;
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}
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void CodeBuffer::UpdateData(size_t offset, const void* data, size_t size) {
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dirty_ = true;
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byte* dst = buffer_ + offset;
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VIXL_ASSERT(dst + size <= cursor_);
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memcpy(dst, data, size);
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}
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void CodeBuffer::Align() {
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byte* end = AlignUp(cursor_, 4);
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const size_t padding_size = end - cursor_;
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VIXL_ASSERT(padding_size <= 4);
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EmitZeroedBytes(static_cast<int>(padding_size));
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}
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void CodeBuffer::EmitZeroedBytes(int n) {
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VIXL_ASSERT(HasSpaceFor(n));
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dirty_ = true;
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memset(cursor_, 0, n);
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cursor_ += n;
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}
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void CodeBuffer::Reset() {
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cursor_ = buffer_;
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SetClean();
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}
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void CodeBuffer::Reset(byte* buffer, size_t capacity) {
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buffer_ = buffer;
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cursor_ = buffer;
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capacity_ = capacity;
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SetClean();
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}
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} // namespace vixl
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