Adding Spectre/System/Log/FileWriter class.

source/System/Log/FileWriter.cpp

@@ -0,0 +1,66 @@
+
+#include <Spectre/System/Log/FileWriter.h>
+
+namespace sp { namespace log {
+
+FileWriter::FileWriter(const std::string file) :
+m_fd	(NULL)
+{
+	if (file.length() > 0) {
+		open(file);
+	}
+}
+
+FileWriter::~FileWriter()
+{
+	if (m_fd) {
+		close();
+	}
+}
+
+bool FileWriter::open(const std::string file)
+{
+	if (!close()) {
+		return false;
+	}
+
+	if (file == "stderr") {
+		m_fd = stderr;
+		return true;
+	}
+
+	if (file == "stdout") {
+		m_fd = stdout;
+		return true;
+	}
+
+	m_fd = fopen(file.c_str(), "a");
+	if (m_fd == NULL) {
+		return false;
+	}
+
+	return true;
+}
+
+bool FileWriter::close()
+{
+	if (m_fd) {
+		// stdout and stderr can not be closed.
+		if (m_fd == stdout || m_fd == stderr) {
+			m_fd = NULL;
+			return true;
+		}
+		if (fclose(m_fd) < 0) {
+			return false;
+		}
+		m_fd = NULL;
+	}
+	return true;
+}
+
+size_t FileWriter::write(const void *data, size_t len)
+{
+	return fwrite(data, 1, len, m_fd);
+}
+
+} } // sp::log