Introduce IOFile abstract class to refactor BufferedFile and GZipFile

IOFile provides the same interface of old BufferedFile. It provides
extension points as pure virtual functions. Those functions are
implemented by 2 concrete subclasses: BufferedFile and GZipFile.

1 files changed, 150 insertions, 0 deletions

diff --git a/src/IOFile.cc b/src/IOFile.cc
new file mode 100644
index 00000000..5088f584
--- /dev/null
+++ b/src/IOFile.cc
@@ -0,0 +1,150 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2011 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#include "IOFile.h"
+
+#include <cstring>
+#include <cstdarg>
+#include <ostream>
+
+#include "a2io.h"
+#include "util.h"
+
+namespace aria2 {
+
+const char IOFile::READ[] = "rb";
+const char IOFile::WRITE[] = "wb";
+const char IOFile::APPEND[] = "ab";
+
+IOFile::operator unspecified_bool_type() const
+{
+  bool ok = isOpen() && !isError();
+  return ok ? &IOFile::goodState : 0;
+}
+
+size_t IOFile::read(void* ptr, size_t count)
+{
+  return onRead(ptr, count);
+}
+
+size_t IOFile::write(const void* ptr, size_t count)
+{
+  return onWrite(ptr, count);
+}
+
+size_t IOFile::write(const char* str)
+{
+  return write(str, strlen(str));
+}
+
+char* IOFile::gets(char* s, int size)
+{
+  return onGets(s, size);
+}
+
+char* IOFile::getsn(char* s, int size)
+{
+  char* ptr = gets(s, size);
+  if(ptr) {
+    int len = strlen(ptr);
+    if(ptr[len-1] == '\n') {
+      ptr[len-1] = '\0';
+    }
+  }
+  return ptr;
+}
+
+std::string IOFile::getLine()
+{
+  std::string res;
+  if(eof()) {
+    return res;
+  }
+  char buf[4096];
+  while(gets(buf, sizeof(buf))) {
+    size_t len = strlen(buf);
+    bool lineBreak = false;
+    if(buf[len-1] == '\n') {
+      --len;
+      lineBreak = true;
+    }
+    res.append(buf, len);
+    if(lineBreak) {
+      break;
+    }
+  }
+  return res;
+}
+
+int IOFile::close()
+{
+  return onClose();
+}
+
+bool IOFile::eof()
+{
+  return !isOpen() || isEOF();
+}
+
+size_t IOFile::transfer(std::ostream& out)
+{
+  size_t count = 0;
+  char buf[4096];
+  while(1) {
+    size_t r = this->read(buf, sizeof(buf));
+    out.write(buf, r);
+    count += r;
+    if(r < sizeof(buf)) {
+      break;
+    }
+  }
+  return count;
+}
+
+int IOFile::vprintf(const char* format, va_list va)
+{
+  return onVprintf(format, va);
+}
+
+int IOFile::flush()
+{
+  return onFlush();
+}
+
+bool IOFile::supportsColor()
+{
+  return onSupportsColor();
+}
+
+} // namespace aria2