43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
#include <cstdio>
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#include "exception.h"
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#include "file_environment.h"
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namespace Shader {
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FileEnvironment::FileEnvironment(const char* path) {
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std::FILE* const file{std::fopen(path, "rb")};
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if (!file) {
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throw RuntimeError("Failed to open file='{}'", path);
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}
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std::fseek(file, 0, SEEK_END);
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const long size{std::ftell(file)};
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std::rewind(file);
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if (size % 8 != 0) {
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std::fclose(file);
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throw RuntimeError("File size={} is not aligned to 8", size);
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}
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// TODO: Use a unique_ptr to avoid zero-initializing this
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const size_t num_inst{static_cast<size_t>(size) / 8};
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data.resize(num_inst);
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if (std::fread(data.data(), 8, num_inst, file) != num_inst) {
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std::fclose(file);
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throw RuntimeError("Failed to read instructions={} from file='{}'", num_inst, path);
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}
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std::fclose(file);
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}
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FileEnvironment::~FileEnvironment() = default;
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u64 FileEnvironment::ReadInstruction(u32 offset) const {
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if (offset % 8 != 0) {
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throw InvalidArgument("offset={} is not aligned to 8", offset);
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}
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if (offset / 8 >= static_cast<u32>(data.size())) {
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throw InvalidArgument("offset={} is out of bounds", offset);
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}
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return data[offset / 8];
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}
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} // namespace Shader
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