33 lines
852 B
C++
33 lines
852 B
C++
#include "assistant.h"
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bool random_file(const std::string& file, size_t size)
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{
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if (file.empty() || size == 0) {
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return false;
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}
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std::ofstream ofs(file, std::ios::binary | std::ios::trunc);
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if (!ofs) {
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return false;
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}
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std::random_device rd;
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std::mt19937_64 gen(rd());
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std::uniform_int_distribution<int> dis(0, 255);
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const size_t buffer_size = 4096;
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std::vector<unsigned char> buffer(buffer_size);
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for (size_t remaining = size; remaining > 0;) {
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size_t chunk = std::min(remaining, buffer_size);
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for (size_t i = 0; i < chunk; ++i) {
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buffer[i] = static_cast<unsigned char>(dis(gen));
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}
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if (!ofs.write(reinterpret_cast<const char*>(buffer.data()), chunk)) {
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return false;
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}
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remaining -= chunk;
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}
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return true;
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} |