Add ZipReader class

Author: adazem009

src/internal/CMakeLists.txt

@@ -4,4 +4,6 @@ target_sources(scratchcpp
     scratch3reader.cpp
     scratch3reader.h
     reader_common.h
+    zipreader.cpp
+    zipreader.h
 )

src/internal/zipreader.cpp

@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#include "zipreader.h"
+
+using namespace libscratchcpp;
+
+ZipReader::ZipReader(const std::string &fileName) :
+    m_fileName(fileName)
+{
+}
+
+ZipReader::ZipReader(const char *fileName) :
+    ZipReader(std::string(fileName))
+{
+}
+
+ZipReader::~ZipReader()
+{
+    close();
+}
+
+bool ZipReader::open()
+{
+    m_zip = zip_open(m_fileName.c_str(), 0, 'r');
+    return m_zip;
+}
+
+void ZipReader::close()
+{
+    if (m_zip)
+        zip_close(m_zip);
+
+    m_zip = nullptr;
+}
+
+size_t ZipReader::readFile(const std::string &fileName, void **buf)
+{
+    if (!m_zip) {
+        buf = nullptr;
+        return 0;
+    }
+
+    size_t bufsize = 0;
+    zip_entry_read(m_zip, buf, &bufsize);
+
+    return bufsize;
+}
+
+std::string ZipReader::readFileToString(const std::string &fileName)
+{
+    void *buf = nullptr;
+    size_t bufsize = readFile(fileName, &buf);
+
+    if (buf) {
+        std::string ret(reinterpret_cast<char *>(buf), bufsize);
+        free(buf);
+
+        return ret;
+    }
+
+    return "";
+}

src/internal/zipreader.h

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <string>
+#include <zip.h>
+
+namespace libscratchcpp
+{
+
+class ZipReader
+{
+    public:
+        ZipReader(const std::string &fileName);
+        ZipReader(const char *fileName);
+        ZipReader(const ZipReader &) = delete;
+        ~ZipReader();
+
+        bool open();
+        void close();
+
+        size_t readFile(const std::string &fileName, void **buf);
+        std::string readFileToString(const std::string &fileName);
+
+    private:
+        std::string m_fileName;
+        struct zip_t *m_zip = nullptr;
+};
+
+} // namespace libscratchcpp