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Merge pull request #2 from DBauer15/buffer
Buffer
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| Original file line number | Diff line number | Diff line change |
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@@ -73,4 +73,7 @@ build/ | |
| build | ||
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| # Install Folder | ||
| install | ||
| install | ||
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| # Except Test Data | ||
| !tests/data/** | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,63 @@ | ||
| #include "buffer.h" | ||
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| #include <stdexcept> | ||
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| #include "log.h" | ||
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| namespace stage { | ||
| namespace backstage { | ||
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| Buffer::Buffer(Buffer& other) { | ||
| m_data = other.m_data; | ||
| m_size_in_bytes = other.m_size_in_bytes; | ||
| m_has_ownership = other.m_has_ownership; | ||
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| other.m_has_ownership = false; | ||
| } | ||
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| Buffer& | ||
| Buffer::operator=(Buffer& other) { | ||
| m_data = other.m_data; | ||
| m_size_in_bytes = other.m_size_in_bytes; | ||
| m_has_ownership = other.m_has_ownership; | ||
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| other.m_has_ownership = false; | ||
| return *this; | ||
| } | ||
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| Buffer::~Buffer() { | ||
| if (m_data != nullptr && m_has_ownership) { | ||
| std::free(m_data); | ||
| } | ||
| } | ||
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| void | ||
| Buffer::data(uint8_t* blob, size_t size) { | ||
| resize(size); | ||
| std::memcpy(m_data, blob, m_size_in_bytes); | ||
| } | ||
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| void | ||
| Buffer::data(std::vector<uint8_t> blob) { | ||
| resize(blob.size()); | ||
| std::memcpy(m_data, blob.data(), m_size_in_bytes); | ||
| } | ||
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| void | ||
| Buffer::resize(size_t newsize_in_bytes) { | ||
| if (newsize_in_bytes == m_size_in_bytes) return; | ||
| if (!m_has_ownership) | ||
| throw std::runtime_error("Cannot resize buffer that is not owned"); | ||
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| if (m_data != nullptr) { | ||
| m_data = (uint8_t*)std::realloc(m_data, newsize_in_bytes); | ||
| } else { | ||
| m_data = (uint8_t*)std::malloc(newsize_in_bytes); | ||
| } | ||
| m_size_in_bytes = newsize_in_bytes; | ||
| } | ||
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| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,114 @@ | ||
| #pragma once | ||
| #include <vector> | ||
| #include <memory> | ||
| #include <cstdlib> | ||
| #include <cstring> | ||
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| namespace stage { | ||
| namespace backstage { | ||
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| struct Buffer { | ||
| Buffer() = default; | ||
| Buffer(uint8_t* blob, size_t size) { data(blob, size); } | ||
| Buffer(std::vector<uint8_t> blob) { data(blob); } | ||
| Buffer(Buffer& other); | ||
| Buffer& operator=(Buffer& other); | ||
| ~Buffer(); | ||
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| uint8_t* data() { return m_data; }; | ||
| uint8_t* release() { | ||
| m_has_ownership = false; | ||
| return m_data; | ||
| }; | ||
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| void data(uint8_t* blob, size_t size); | ||
| void data(std::vector<uint8_t> blob); | ||
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| void resize(size_t newsize_in_bytes); | ||
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| size_t size() { return m_size_in_bytes; } | ||
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| private: | ||
| uint8_t* m_data { nullptr }; | ||
| size_t m_size_in_bytes { 0 }; | ||
| size_t m_capacity_in_bytes { 0 }; | ||
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| bool m_has_ownership { true }; | ||
| }; | ||
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| template<typename T> | ||
| struct BufferView { | ||
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| BufferView() = default; | ||
| BufferView(std::shared_ptr<Buffer> source, size_t offset, size_t num_elements, size_t stride = sizeof(T)) : m_offset(offset), m_size(num_elements), m_stride(stride) { | ||
| m_buffer = source; | ||
| } | ||
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| void setBuffer(std::shared_ptr<Buffer> source) { | ||
| m_offset = source->size(); | ||
| m_size = 0; | ||
| m_stride = sizeof(T); | ||
| m_buffer = source; | ||
| } | ||
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| void setBuffer(std::shared_ptr<Buffer> source, size_t offset, size_t num_elements, size_t stride = sizeof(T)) { | ||
| m_offset = source->size() + offset; | ||
| m_size = num_elements; | ||
| m_stride = stride; | ||
| m_buffer = source; | ||
| } | ||
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| uint8_t* data() const { | ||
| if (!m_buffer) return nullptr; | ||
| return (m_buffer->data() + m_offset); | ||
| } | ||
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| void push_back(const T& element) { | ||
| if (!m_buffer) | ||
| return; | ||
| size_t oldsize_in_bytes = m_buffer->size(); | ||
| if (oldsize_in_bytes <= positionInBuffer()) | ||
| m_buffer->resize(oldsize_in_bytes + m_stride); | ||
| std::memcpy(m_buffer->data() + positionInBuffer(), &element, sizeof(T)); | ||
| m_size += 1; | ||
| } | ||
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| void push_back(std::vector<T>& elements) { | ||
| if (!m_buffer) | ||
| return; | ||
| size_t oldsize_in_bytes = m_buffer->size(); | ||
| if (oldsize_in_bytes <= positionInBuffer()) | ||
| m_buffer->resize(positionInBuffer() + m_stride * elements.size()); | ||
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| if (m_stride == sizeof(T)) { | ||
| std::memcpy(m_buffer->data() + positionInBuffer(), elements.data(), sizeof(T) * elements.size()); | ||
| } else { | ||
| for (size_t i = 0; i < elements.size(); i++) { | ||
| std::memcpy(m_buffer->data() + positionInBuffer() + (i * m_stride), elements.data() + i, sizeof(T)); | ||
| } | ||
| } | ||
| m_size += elements.size(); | ||
| } | ||
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| size_t sizeInBytes() const { return m_size * sizeof(T); } | ||
| size_t size() const { return m_size; } | ||
| size_t offset() const { return m_offset; } | ||
| size_t stride() const { return m_stride; } | ||
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| T& operator[](uint32_t id) const { | ||
| return *(T*)(data() + (id * m_stride)); | ||
| } | ||
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| private: | ||
| std::shared_ptr<Buffer> m_buffer; | ||
| size_t m_offset; | ||
| size_t m_stride; | ||
| size_t m_size { 0 }; | ||
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| size_t positionInBuffer() { | ||
| return (m_offset + m_size * m_stride); | ||
| } | ||
| }; | ||
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| } | ||
| } |
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