31 lines
791 B
C
31 lines
791 B
C
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#include <windows.h>
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#include <crc32.h>
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#include <err.h>
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#include <utils.h>
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uint32_t utils_file_crc32c(const char *filePath) {
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HANDLE file = CreateFileA(filePath, FILE_READ_ACCESS, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (!file) {
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err_mb_a("Could not open file: %s", filePath);
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}
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LARGE_INTEGER fileSize;
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GetFileSizeEx(file, &fileSize);
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HANDLE hMap = CreateFileMappingA(file, NULL, PAGE_READONLY, 0, 0, NULL);
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char *map = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0);
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if (!map) {
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err_mb_a("Could not create file mapping for %s", filePath);
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}
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uint32_t crc = crc32c(0, (unsigned char*)map, fileSize.QuadPart);
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UnmapViewOfFile(map);
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CloseHandle(hMap);
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CloseHandle(file);
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return crc;
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}
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