Initial commit

core-library/io/io-helper.cpp

@@ -0,0 +1,72 @@
+#include "io-helper.h"
+
+#include <system_error>
+
+std::FILE* core::open_file(const char* file_path, const char* mode)
+{
+	std::FILE* file = std::fopen(file_path, mode);
+	if (!file)
+		throw std::system_error(errno, std::system_category());
+
+	return file;
+}
+
+void core::seek_file_to_beginning(std::FILE* file, long offset)
+{
+	const int result = std::fseek(file, offset, SEEK_SET);
+	if (result != 0)
+		throw std::system_error(errno, std::system_category());
+}
+
+void core::seek_file_relatively(std::FILE* file, long offset)
+{
+	const int result = std::fseek(file, offset, SEEK_CUR);
+	if (result != 0)
+		throw std::system_error(errno, std::system_category());
+}
+
+void core::seek_file_to_end(std::FILE* file, long offset)
+{
+	const int result = std::fseek(file, offset, SEEK_END);
+	if (result != 0)
+		throw std::system_error(errno, std::system_category());
+}
+
+long core::get_file_offset(std::FILE* file)
+{
+	const long offset = std::ftell(file);
+	if (offset < 0)
+		throw std::system_error(errno, std::system_category());
+
+	return offset;
+}
+
+std::size_t core::read_from_file(void* buffer, std::size_t size, std::size_t count, std::FILE* file)
+{
+	const std::size_t objects_read = std::fread(buffer, size, count, file);
+	if (objects_read < count)
+	{
+		if (std::feof(file))
+			throw std::runtime_error("Failed to read from file: End-of-file reached.");
+		else
+			throw std::runtime_error("Failed to read from file: Unknown error.");
+	}
+
+	return objects_read;
+}
+
+std::size_t core::write_to_file(const void* buffer, std::size_t size, std::size_t count, std::FILE* file)
+{
+	const std::size_t objects_written = std::fwrite(buffer, size, count, file);
+	if (objects_written < count)
+		throw std::runtime_error("Failed to write to file.");
+
+	return objects_written;
+}
+
+void core::close_file(std::FILE* file)
+{
+	int result = std::fclose(file);
+	if (result != 0)
+		throw std::runtime_error("Failed to close file.");
+}