ios demo version

ios/ZBarSDK_old/Headers/ZBarSDK/zbar/Exception.h

@@ -0,0 +1,187 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_EXCEPTION_H_
+#define _ZBAR_EXCEPTION_H_
+
+/// @file
+/// C++ Exception definitions
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Exception.h"
+#endif
+
+#include <exception>
+#include <new>
+
+namespace zbar {
+
+/// base class for exceptions defined by this API.
+class Exception : public std::exception {
+
+public:
+    /// create exception from C library error
+    Exception (const void *obj = NULL)
+        : std::exception(),
+          _obj(obj)
+    { }
+
+    ~Exception () throw() { }
+
+    /// retrieve error message
+    virtual const char* what () const throw()
+    {
+        if(!_obj)
+            return("zbar library unspecified generic error");
+        return(_zbar_error_string(_obj, 0));
+    }
+
+private:
+    const void *_obj;
+};
+
+/// internal library error.
+class InternalError : public Exception {
+public:
+    /// create exception from C library error
+    InternalError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// unsupported request.
+class UnsupportedError : public Exception {
+public:
+    /// create exception from C library error
+    UnsupportedError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// invalid request.
+class InvalidError : public Exception {
+public:
+    /// create exception from C library error
+    InvalidError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// failed system call.
+class SystemError : public Exception {
+public:
+    /// create exception from C library error
+    SystemError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// locking error.
+class LockingError : public Exception {
+public:
+    /// create exception from C library error
+    LockingError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// all resources busy.
+class BusyError : public Exception {
+public:
+    /// create exception from C library error
+    BusyError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// X11 display error.
+class XDisplayError : public Exception {
+public:
+    /// create exception from C library error
+    XDisplayError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// X11 protocol error.
+class XProtoError : public Exception {
+public:
+    /// create exception from C library error
+    XProtoError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// output window is closed.
+class ClosedError : public Exception {
+public:
+    /// create exception from C library error
+    ClosedError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// image format error
+class FormatError : public Exception {
+    // FIXME needs c equivalent
+
+    virtual const char* what () const throw()
+    {
+        // FIXME what format?
+        return("unsupported format");
+    }
+};
+
+/// @internal
+
+/// extract error information and create exception.
+static inline std::exception throw_exception (const void *obj)
+{
+    switch(_zbar_get_error_code(obj)) {
+    case ZBAR_ERR_NOMEM:
+        throw std::bad_alloc();
+    case ZBAR_ERR_INTERNAL:
+        throw InternalError(obj);
+    case ZBAR_ERR_UNSUPPORTED:
+        throw UnsupportedError(obj);
+    case ZBAR_ERR_INVALID:
+        throw InvalidError(obj);
+    case ZBAR_ERR_SYSTEM:
+        throw SystemError(obj);
+    case ZBAR_ERR_LOCKING:
+        throw LockingError(obj);
+    case ZBAR_ERR_BUSY:
+        throw BusyError(obj);
+    case ZBAR_ERR_XDISPLAY:
+        throw XDisplayError(obj);
+    case ZBAR_ERR_XPROTO:
+        throw XProtoError(obj);
+    case ZBAR_ERR_CLOSED:
+        throw ClosedError(obj);
+    default:
+        throw Exception(obj);
+    }
+}
+
+}
+
+#endif