45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
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#include "VirtualTestFile.h"
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#include <algorithm>
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#include <cstring>
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using std::min;
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VirtualTestFile::VirtualTestFile(size_t size): _fileData(new char[size]), _size(size) {
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fillFileWithRandomData();
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}
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VirtualTestFile::~VirtualTestFile() {
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delete[] _fileData;
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}
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void VirtualTestFile::fillFileWithRandomData() {
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long long int val = 1;
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for(size_t i=0; i<_size/sizeof(long long int); ++i) {
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//MMIX linear congruential generator
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val *= 6364136223846793005L;
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val += 1442695040888963407;
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reinterpret_cast<long long int*>(_fileData)[i] = val;
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}
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}
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int VirtualTestFile::read(void *buf, size_t count, off_t offset) {
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size_t realCount = min(count, _size - offset);
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memcpy(buf, _fileData+offset, realCount);
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return realCount;
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}
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bool VirtualTestFile::fileContentEqual(char *content, size_t count, off_t offset) {
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return 0 == memcmp(content, _fileData + offset, count);
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}
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VirtualTestFileWriteable::VirtualTestFileWriteable(size_t size)
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:VirtualTestFile(size) {
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originalFileData = new char[size];
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memcpy(originalFileData, _fileData, size);
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}
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VirtualTestFileWriteable::~VirtualTestFileWriteable() {
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delete[] originalFileData;
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}
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