45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
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#pragma once
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#include <string>
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namespace Md5Utils {
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/**
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* Compute MD5 hash of a file, reading in chunks to avoid memory issues.
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* @param filePath Path to the file on SD card
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* @return MD5 hash as lowercase hex string, or empty string on error
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*/
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std::string computeFileMd5(const std::string& filePath);
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/**
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* Get cached MD5 for a book file.
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* Validates that the cached hash was computed for the current file size.
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* @param bookPath Full path to the book file (e.g., "/Books/mybook.epub")
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* @param cacheDir The .crosspoint cache directory (e.g., "/.crosspoint")
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* @param currentFileSize Current size of the book file for validation
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* @return Cached MD5 hash, or empty string if not cached or invalid
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*/
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std::string getCachedMd5(const std::string& bookPath, const std::string& cacheDir, size_t currentFileSize);
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/**
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* Cache MD5 hash for a book file.
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* Stores the hash along with the file size for later validation.
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* @param bookPath Full path to the book file
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* @param cacheDir The .crosspoint cache directory
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* @param md5 The MD5 hash to cache
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* @param fileSize The file size when hash was computed
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* @return true if successfully cached
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*/
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bool cacheMd5(const std::string& bookPath, const std::string& cacheDir, const std::string& md5, size_t fileSize);
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/**
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* Compute and cache MD5 hash for a book file.
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* Combines computeFileMd5 and cacheMd5 into a single operation.
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* @param bookPath Full path to the book file
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* @param cacheDir The .crosspoint cache directory
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* @return MD5 hash as lowercase hex string, or empty string on error
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*/
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std::string computeAndCacheMd5(const std::string& bookPath, const std::string& cacheDir);
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} // namespace Md5Utils
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