Organic Maps sources as of 02.04.2025 (fad26bbf22ac3da75e01e62aa01e5c8e11861005)

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coding/zip_reader.hpp

@@ -0,0 +1,57 @@
+#pragma once
+
+#include "coding/file_reader.hpp"
+#include "coding/file_writer.hpp"
+
+#include "base/exception.hpp"
+
+#include <cstddef>
+#include <cstdint>
+#include <functional>
+#include <string>
+#include <utility>
+#include <vector>
+
+class ZipFileReader : public FileReader
+{
+public:
+  struct Delegate
+  {
+    virtual ~Delegate() = default;
+
+    // When |size| is zero, end of file is reached.
+    virtual void OnBlockUnzipped(size_t size, char const * data) = 0;
+
+    virtual void OnStarted() {}
+    virtual void OnCompleted() {}
+  };
+
+  using ProgressFn = std::function<void(uint64_t, uint64_t)>;
+  /// Contains file name inside zip and it's uncompressed size
+  using FileList = std::vector<std::pair<std::string, uint32_t>>;
+
+  DECLARE_EXCEPTION(OpenZipException, OpenException);
+  DECLARE_EXCEPTION(LocateZipException, OpenException);
+  DECLARE_EXCEPTION(InvalidZipException, OpenException);
+
+  ZipFileReader(std::string const & container, std::string const & file,
+                uint32_t logPageSize = FileReader::kDefaultLogPageSize,
+                uint32_t logPageCount = FileReader::kDefaultLogPageCount);
+
+  /// @note Size() returns compressed file size inside zip
+  uint64_t UncompressedSize() const { return m_uncompressedFileSize; }
+
+  /// @warning Can also throw Writer::OpenException and Writer::WriteException
+  static void UnzipFile(std::string const & zipContainer, std::string const & fileInZip,
+                        Delegate & delegate);
+  static void UnzipFile(std::string const & zipContainer, std::string const & fileInZip,
+                        std::string const & outPath);
+
+  static void FilesList(std::string const & zipContainer, FileList & filesList);
+
+  /// Quick version without exceptions
+  static bool IsZip(std::string const & zipContainer);
+
+private:
+  uint64_t m_uncompressedFileSize;
+};