/////////////////////////////////////////////////////////////////////////////
-// Name: utils.h
+// Name: wx/utils.h
// Purpose: Miscellaneous utilities
// Author: Julian Smart
// Modified by:
// headers
// ----------------------------------------------------------------------------
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) && !defined(__EMX__)
-// Some older compilers (such as EMX) cannot handle
-// #pragma interface/implementation correctly, iff
-// #pragma implementation is used in _two_ translation
-// units (as created by e.g. event.cpp compiled for
-// libwx_base and event.cpp compiled for libwx_gui_core).
-// So we must not use those pragmas for those compilers in
-// such files.
- #pragma interface "utils.h"
-#endif
-
#include "wx/object.h"
#include "wx/list.h"
#include "wx/filefn.h"
+#if wxUSE_GUI
+ #include "wx/gdicmn.h"
+#endif
class WXDLLIMPEXP_BASE wxArrayString;
+class WXDLLIMPEXP_BASE wxArrayInt;
// need this for wxGetDiskSpace() as we can't, unfortunately, forward declare
// wxLongLong
#include "wx/longlong.h"
-#ifdef __X__
+// need for wxOperatingSystemId
+#include "wx/platinfo.h"
+
+#ifdef __WATCOMC__
+ #include <direct.h>
+#elif defined(__X__)
#include <dirent.h>
#include <unistd.h>
#endif
class WXDLLIMPEXP_CORE wxFrame;
class WXDLLIMPEXP_CORE wxWindow;
class WXDLLIMPEXP_CORE wxWindowList;
-class WXDLLIMPEXP_CORE wxPoint;
// ----------------------------------------------------------------------------
// Macros
#define wxMax(a,b) (((a) > (b)) ? (a) : (b))
#define wxMin(a,b) (((a) < (b)) ? (a) : (b))
+#define wxClip(a,b,c) (((a) < (b)) ? (b) : (((a) > (c)) ? (c) : (a)))
-// wxGetFreeMemory can return huge amount of memory on 64-bit platforms
-// define wxMemorySize according to the type which best fits your platform
-#if wxUSE_LONGLONG && defined(__WIN64__)
- // 64 bit Windowses have sizeof(long) only 32 bit long
- // we need to use wxLongLong to express memory sizes
- #define wxMemorySize wxLongLong
+// wxGetFreeMemory can return huge amount of memory on 32-bit platforms as well
+// so to always use long long for its result type on all platforms which
+// support it
+#if wxUSE_LONGLONG
+ typedef wxLongLong wxMemorySize;
#else
- // 64 bit UNIX has sizeof(long) = 64
- // assume 32 bit platforms cannnot return more than 32bits of
- #define wxMemorySize long
+ typedef long wxMemorySize;
#endif
// ----------------------------------------------------------------------------
// String functions (deprecated, use wxString)
// ----------------------------------------------------------------------------
-// Make a copy of this string using 'new'
-#if WXWIN_COMPATIBILITY_2_4
-wxDEPRECATED( WXDLLIMPEXP_BASE wxChar* copystring(const wxChar *s) );
-#endif
-
// A shorter way of using strcmp
#define wxStringEq(s1, s2) (s1 && s2 && (wxStrcmp(s1, s2) == 0))
// ----------------------------------------------------------------------------
// Sound the bell
+#if !defined __EMX__ && \
+ (defined __WXMOTIF__ || defined __WXGTK__ || defined __WXX11__)
+WXDLLIMPEXP_CORE void wxBell();
+#else
WXDLLIMPEXP_BASE void wxBell();
+#endif
// Get OS description as a user-readable string
WXDLLIMPEXP_BASE wxString wxGetOsDescription();
// Get OS version
-WXDLLIMPEXP_BASE int wxGetOsVersion(int *majorVsn = (int *) NULL,
- int *minorVsn = (int *) NULL);
+WXDLLIMPEXP_BASE wxOperatingSystemId wxGetOsVersion(int *majorVsn = (int *) NULL,
+ int *minorVsn = (int *) NULL);
+
+// Get platform endianness
+WXDLLIMPEXP_BASE bool wxIsPlatformLittleEndian();
+
+// Get platform architecture
+WXDLLIMPEXP_BASE bool wxIsPlatform64Bit();
// Return a string with the current date/time
WXDLLIMPEXP_BASE wxString wxNow();
// Return path to wxWin data (/usr/share/wx/%{version}) (Unices)
WXDLLIMPEXP_BASE wxString wxGetDataDir();
+/*
+ * Class to make it easier to specify platform-dependent values
+ *
+ * Examples:
+ * long val = wxPlatform::If(wxMac, 1).ElseIf(wxGTK, 2).ElseIf(stPDA, 5).Else(3);
+ * wxString strVal = wxPlatform::If(wxMac, wxT("Mac")).ElseIf(wxMSW, wxT("MSW")).Else(wxT("Other"));
+ *
+ * A custom platform symbol:
+ *
+ * #define stPDA 100
+ * #ifdef __WXWINCE__
+ * wxPlatform::AddPlatform(stPDA);
+ * #endif
+ *
+ * long windowStyle = wxCAPTION | (long) wxPlatform::IfNot(stPDA, wxRESIZE_BORDER);
+ *
+ */
+
+class WXDLLIMPEXP_BASE wxPlatform
+{
+public:
+ wxPlatform() { Init(); }
+ wxPlatform(const wxPlatform& platform) { Copy(platform); }
+ void operator = (const wxPlatform& platform) { Copy(platform); }
+ void Copy(const wxPlatform& platform);
+
+ // Specify an optional default value
+ wxPlatform(int defValue) { Init(); m_longValue = (long)defValue; }
+ wxPlatform(long defValue) { Init(); m_longValue = defValue; }
+ wxPlatform(const wxString& defValue) { Init(); m_stringValue = defValue; }
+ wxPlatform(double defValue) { Init(); m_doubleValue = defValue; }
+
+ static wxPlatform If(int platform, long value);
+ static wxPlatform IfNot(int platform, long value);
+ wxPlatform& ElseIf(int platform, long value);
+ wxPlatform& ElseIfNot(int platform, long value);
+ wxPlatform& Else(long value);
+
+ static wxPlatform If(int platform, int value) { return If(platform, (long)value); }
+ static wxPlatform IfNot(int platform, int value) { return IfNot(platform, (long)value); }
+ wxPlatform& ElseIf(int platform, int value) { return ElseIf(platform, (long) value); }
+ wxPlatform& ElseIfNot(int platform, int value) { return ElseIfNot(platform, (long) value); }
+ wxPlatform& Else(int value) { return Else((long) value); }
+
+ static wxPlatform If(int platform, double value);
+ static wxPlatform IfNot(int platform, double value);
+ wxPlatform& ElseIf(int platform, double value);
+ wxPlatform& ElseIfNot(int platform, double value);
+ wxPlatform& Else(double value);
+
+ static wxPlatform If(int platform, const wxString& value);
+ static wxPlatform IfNot(int platform, const wxString& value);
+ wxPlatform& ElseIf(int platform, const wxString& value);
+ wxPlatform& ElseIfNot(int platform, const wxString& value);
+ wxPlatform& Else(const wxString& value);
+
+ long GetInteger() const { return m_longValue; }
+ const wxString& GetString() const { return m_stringValue; }
+ double GetDouble() const { return m_doubleValue; }
+
+ operator int() const { return (int) GetInteger(); }
+ operator long() const { return GetInteger(); }
+ operator double() const { return GetDouble(); }
+ operator const wxString&() const { return GetString(); }
+
+ static void AddPlatform(int platform);
+ static bool Is(int platform);
+ static void ClearPlatforms();
+
+private:
+
+ void Init() { m_longValue = 0; m_doubleValue = 0.0; }
+
+ long m_longValue;
+ double m_doubleValue;
+ wxString m_stringValue;
+ static wxArrayInt* sm_customPlatforms;
+};
+
+/// Function for testing current platform
+inline bool wxPlatformIs(int platform) { return wxPlatform::Is(platform); }
#if wxUSE_GUI
// in wxMSW.
WXDLLEXPORT bool wxSetDetectableAutoRepeat( bool flag );
-// ----------------------------------------------------------------------------
-// Window ID management
-// ----------------------------------------------------------------------------
-// Generate a unique ID
-WXDLLEXPORT long wxNewId();
+// wxMouseState is used to hold information about button and modifier state
+// and is what is returned from wxGetMouseState.
+class WXDLLEXPORT wxMouseState
+{
+public:
+ wxMouseState()
+ : m_x(0), m_y(0),
+ m_leftDown(false), m_middleDown(false), m_rightDown(false),
+ m_controlDown(false), m_shiftDown(false), m_altDown(false),
+ m_metaDown(false)
+ {}
+
+ wxCoord GetX() { return m_x; }
+ wxCoord GetY() { return m_y; }
+
+ bool LeftDown() { return m_leftDown; }
+ bool MiddleDown() { return m_middleDown; }
+ bool RightDown() { return m_rightDown; }
+
+ bool ControlDown() { return m_controlDown; }
+ bool ShiftDown() { return m_shiftDown; }
+ bool AltDown() { return m_altDown; }
+ bool MetaDown() { return m_metaDown; }
+ bool CmdDown()
+ {
+#if defined(__WXMAC__) || defined(__WXCOCOA__)
+ return MetaDown();
+#else
+ return ControlDown();
+#endif
+ }
-// Ensure subsequent IDs don't clash with this one
-WXDLLEXPORT void wxRegisterId(long id);
+ void SetX(wxCoord x) { m_x = x; }
+ void SetY(wxCoord y) { m_y = y; }
-// Return the current ID
-WXDLLEXPORT long wxGetCurrentId();
+ void SetLeftDown(bool down) { m_leftDown = down; }
+ void SetMiddleDown(bool down) { m_middleDown = down; }
+ void SetRightDown(bool down) { m_rightDown = down; }
+
+ void SetControlDown(bool down) { m_controlDown = down; }
+ void SetShiftDown(bool down) { m_shiftDown = down; }
+ void SetAltDown(bool down) { m_altDown = down; }
+ void SetMetaDown(bool down) { m_metaDown = down; }
+
+private:
+ wxCoord m_x;
+ wxCoord m_y;
+
+ bool m_leftDown : 1;
+ bool m_middleDown : 1;
+ bool m_rightDown : 1;
+
+ bool m_controlDown : 1;
+ bool m_shiftDown : 1;
+ bool m_altDown : 1;
+ bool m_metaDown : 1;
+};
+
+
+// Returns the current state of the mouse position, buttons and modifers
+WXDLLEXPORT wxMouseState wxGetMouseState();
#endif // wxUSE_GUI
// ----------------------------------------------------------------------------
-// Various conversions
+// Window ID management
// ----------------------------------------------------------------------------
-// these functions are deprecated, use wxString methods instead!
-#if WXWIN_COMPATIBILITY_2_4
+// Ensure subsequent IDs don't clash with this one
+WXDLLIMPEXP_BASE void wxRegisterId(long id);
-extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxFloatToStringStr;
-extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxDoubleToStringStr;
+// Return the current ID
+WXDLLIMPEXP_BASE long wxGetCurrentId();
-wxDEPRECATED( WXDLLIMPEXP_BASE void StringToFloat(const wxChar *s, float *number) );
-wxDEPRECATED( WXDLLIMPEXP_BASE wxChar* FloatToString(float number, const wxChar *fmt = wxFloatToStringStr) );
-wxDEPRECATED( WXDLLIMPEXP_BASE void StringToDouble(const wxChar *s, double *number) );
-wxDEPRECATED( WXDLLIMPEXP_BASE wxChar* DoubleToString(double number, const wxChar *fmt = wxDoubleToStringStr) );
-wxDEPRECATED( WXDLLIMPEXP_BASE void StringToInt(const wxChar *s, int *number) );
-wxDEPRECATED( WXDLLIMPEXP_BASE void StringToLong(const wxChar *s, long *number) );
-wxDEPRECATED( WXDLLIMPEXP_BASE wxChar* IntToString(int number) );
-wxDEPRECATED( WXDLLIMPEXP_BASE wxChar* LongToString(long number) );
+// Generate a unique ID
+WXDLLIMPEXP_BASE long wxNewId();
-#endif // WXWIN_COMPATIBILITY_2_4
+// ----------------------------------------------------------------------------
+// Various conversions
+// ----------------------------------------------------------------------------
// Convert 2-digit hex number to decimal
WXDLLIMPEXP_BASE int wxHexToDec(const wxString& buf);
// Convert decimal integer to 2-character hex string
WXDLLIMPEXP_BASE void wxDecToHex(int dec, wxChar *buf);
+WXDLLIMPEXP_BASE void wxDecToHex(int dec, char* ch1, char* ch2);
WXDLLIMPEXP_BASE wxString wxDecToHex(int dec);
// ----------------------------------------------------------------------------
// by default synchronous execution disables all program windows to avoid
// that the user interacts with the program while the child process is
// running, you can use this flag to prevent this from happening
- wxEXEC_NODISABLE = 8
+ wxEXEC_NODISABLE = 8,
+
+ // by default, the event loop is run while waiting for synchronous execution
+ // to complete and this flag can be used to simply block the main process
+ // until the child process finishes
+ wxEXEC_NOEVENTS = 16,
+
+ // convenient synonym for flags given system()-like behaviour
+ wxEXEC_BLOCK = wxEXEC_SYNC | wxEXEC_NOEVENTS
};
// Execute another program.
wxArrayString& error,
int flags = 0);
+#if defined(__WXMSW__) && wxUSE_IPC
+// ask a DDE server to execute the DDE request with given parameters
+WXDLLIMPEXP_BASE bool wxExecuteDDE(const wxString& ddeServer,
+ const wxString& ddeTopic,
+ const wxString& ddeCommand);
+#endif // __WXMSW__ && wxUSE_IPC
+
enum wxSignal
{
wxSIGNONE = 0, // verify if the process exists under Unix
// Shutdown or reboot the PC
WXDLLIMPEXP_BASE bool wxShutdown(wxShutdownFlags wFlags);
-enum wxPowerType
-{
- wxPOWER_SOCKET,
- wxPOWER_BATTERY,
- wxPOWER_UNKNOWN
-};
-
-WXDLLIMPEXP_BASE wxPowerType wxGetPowerType();
-
-enum wxBatteryState
-{
- wxBATTERY_NORMAL_STATE, // system is fully usable
- wxBATTERY_LOW_STATE, // start to worry
- wxBATTERY_CRITICAL_STATE, // save quickly
- wxBATTERY_SHUTDOWN_STATE, // too late
- wxBATTERY_UNKNOWN_STATE
-};
-
-WXDLLIMPEXP_BASE wxBatteryState wxGetBatteryState();
-
// send the given signal to the process (only NONE and KILL are supported under
// Windows, all others mean TERM), return 0 if ok and -1 on error
//
#endif // wxUSE_ON_FATAL_EXCEPTION
-#if wxABI_VERSION > 20601
-// Launch url in the user's default internet browser
-WXDLLIMPEXP_BASE bool wxLaunchDefaultBrowser(const wxString& url);
-#endif
-
// ----------------------------------------------------------------------------
// Environment variables
// ----------------------------------------------------------------------------
WXDLLIMPEXP_BASE bool wxGetEnv(const wxString& var, wxString *value);
// set the env var name to the given value, return true on success
-WXDLLIMPEXP_BASE bool wxSetEnv(const wxString& var, const wxChar *value);
+WXDLLIMPEXP_BASE bool wxSetEnv(const wxString& var, const wxString& value);
// remove the env var from environment
-inline bool wxUnsetEnv(const wxString& var) { return wxSetEnv(var, NULL); }
+WXDLLIMPEXP_BASE bool wxUnsetEnv(const wxString& var);
+
+#if WXWIN_COMPATIBILITY_2_8
+inline bool wxSetEnv(const wxString& var, const char *value)
+ { return wxSetEnv(var, wxString(value)); }
+inline bool wxSetEnv(const wxString& var, const wchar_t *value)
+ { return wxSetEnv(var, wxString(value)); }
+template<typename T>
+inline bool wxSetEnv(const wxString& var, const wxCharTypeBuffer<T>& value)
+ { return wxSetEnv(var, wxString(value)); }
+inline bool wxSetEnv(const wxString& var, const wxCStrData& value)
+ { return wxSetEnv(var, wxString(value)); }
+
+// this one is for passing NULL directly - don't use it, use wxUnsetEnv instead
+wxDEPRECATED( inline bool wxSetEnv(const wxString& var, int value) );
+inline bool wxSetEnv(const wxString& var, int value)
+{
+ wxASSERT_MSG( value == 0, "using non-NULL integer as string?" );
+ return wxUnsetEnv(var);
+}
+#endif // WXWIN_COMPATIBILITY_2_8
// ----------------------------------------------------------------------------
// Network and username functions.
// Get the user's home dir (caller must copy --- volatile)
// returns NULL is no HOME dir is known
-#if defined(__UNIX__) && wxUSE_UNICODE
+#if defined(__UNIX__) && wxUSE_UNICODE && !defined(__WINE__)
WXDLLIMPEXP_BASE const wxMB2WXbuf wxGetUserHome(const wxString& user = wxEmptyString);
#else
WXDLLIMPEXP_BASE wxChar* wxGetUserHome(const wxString& user = wxEmptyString);
#endif
+#if wxUSE_LONGLONG
+ typedef wxLongLong wxDiskspaceSize_t;
+#else
+ typedef long wxDiskspaceSize_t;
+#endif
+
// get number of total/free bytes on the disk where path belongs
WXDLLIMPEXP_BASE bool wxGetDiskSpace(const wxString& path,
- wxLongLong *pTotal = NULL,
- wxLongLong *pFree = NULL);
+ wxDiskspaceSize_t *pTotal = NULL,
+ wxDiskspaceSize_t *pFree = NULL);
#if wxUSE_GUI // GUI only things from now on
+// ----------------------------------------------------------------------------
+// Launch default browser
+// ----------------------------------------------------------------------------
+
+// flags for wxLaunchDefaultBrowser
+enum
+{
+ wxBROWSER_NEW_WINDOW = 1
+};
+
+// Launch url in the user's default internet browser
+WXDLLIMPEXP_CORE bool wxLaunchDefaultBrowser(const wxString& url, int flags = 0);
+
// ----------------------------------------------------------------------------
// Menu accelerators related things
// ----------------------------------------------------------------------------
-WXDLLEXPORT wxChar* wxStripMenuCodes(const wxChar *in, wxChar *out = (wxChar *) NULL);
-WXDLLEXPORT wxString wxStripMenuCodes(const wxString& str);
+// flags for wxStripMenuCodes
+enum
+{
+ // strip '&' characters
+ wxStrip_Mnemonics = 1,
+
+ // strip everything after '\t'
+ wxStrip_Accel = 2,
+
+ // strip everything (this is the default)
+ wxStrip_All = wxStrip_Mnemonics | wxStrip_Accel
+};
+
+// strip mnemonics and/or accelerators from the label
+WXDLLEXPORT wxString
+wxStripMenuCodes(const wxString& str, int flags = wxStrip_All);
+
+#if WXWIN_COMPATIBILITY_2_6
+// obsolete and deprecated version, do not use, use the above overload instead
+wxDEPRECATED(
+ WXDLLEXPORT wxChar* wxStripMenuCodes(const wxChar *in, wxChar *out = NULL)
+);
#if wxUSE_ACCEL
class WXDLLEXPORT wxAcceleratorEntry;
-WXDLLEXPORT wxAcceleratorEntry *wxGetAccelFromString(const wxString& label);
+
+// use wxAcceleratorEntry::Create() or FromString() methods instead
+wxDEPRECATED(
+ WXDLLEXPORT wxAcceleratorEntry *wxGetAccelFromString(const wxString& label)
+);
#endif // wxUSE_ACCEL
+#endif // WXWIN_COMPATIBILITY_2_6
+
// ----------------------------------------------------------------------------
// Window search
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Set the cursor to the busy cursor for all windows
-class WXDLLEXPORT wxCursor;
-extern WXDLLEXPORT_DATA(wxCursor*) wxHOURGLASS_CURSOR;
-WXDLLEXPORT void wxBeginBusyCursor(wxCursor *cursor = wxHOURGLASS_CURSOR);
+WXDLLIMPEXP_CORE void wxBeginBusyCursor(const wxCursor *cursor = wxHOURGLASS_CURSOR);
// Restore cursor to normal
WXDLLEXPORT void wxEndBusyCursor();
class WXDLLEXPORT wxBusyCursor
{
public:
- wxBusyCursor(wxCursor* cursor = wxHOURGLASS_CURSOR)
+ wxBusyCursor(const wxCursor* cursor = wxHOURGLASS_CURSOR)
{ wxBeginBusyCursor(cursor); }
~wxBusyCursor()
{ wxEndBusyCursor(); }
static const wxCursor GetBusyCursor();
};
-
-// ----------------------------------------------------------------------------
-// Reading and writing resources (eg WIN.INI, .Xdefaults)
-// ----------------------------------------------------------------------------
-
-#if wxUSE_RESOURCES
-WXDLLEXPORT bool wxWriteResource(const wxString& section, const wxString& entry, const wxString& value, const wxString& file = wxEmptyString);
-WXDLLEXPORT bool wxWriteResource(const wxString& section, const wxString& entry, float value, const wxString& file = wxEmptyString);
-WXDLLEXPORT bool wxWriteResource(const wxString& section, const wxString& entry, long value, const wxString& file = wxEmptyString);
-WXDLLEXPORT bool wxWriteResource(const wxString& section, const wxString& entry, int value, const wxString& file = wxEmptyString);
-
-WXDLLEXPORT bool wxGetResource(const wxString& section, const wxString& entry, wxChar **value, const wxString& file = wxEmptyString);
-WXDLLEXPORT bool wxGetResource(const wxString& section, const wxString& entry, float *value, const wxString& file = wxEmptyString);
-WXDLLEXPORT bool wxGetResource(const wxString& section, const wxString& entry, long *value, const wxString& file = wxEmptyString);
-WXDLLEXPORT bool wxGetResource(const wxString& section, const wxString& entry, int *value, const wxString& file = wxEmptyString);
-#endif // wxUSE_RESOURCES
-
void WXDLLEXPORT wxGetMousePosition( int* x, int* y );
// MSW only: get user-defined resource from the .res file.
#endif // MSW
// ----------------------------------------------------------------------------
-// Display and colorss (X only)
+// X11 Display access
// ----------------------------------------------------------------------------
+#if defined(__X__) || defined(__WXGTK__)
+
#ifdef __WXGTK__
void *wxGetDisplay();
#endif
#ifdef __X__
- WXDisplay *wxGetDisplay();
- bool wxSetDisplay(const wxString& display_name);
- wxString wxGetDisplayName();
+ WXDLLIMPEXP_CORE WXDisplay *wxGetDisplay();
+ WXDLLIMPEXP_CORE bool wxSetDisplay(const wxString& display_name);
+ WXDLLIMPEXP_CORE wxString wxGetDisplayName();
#endif // X or GTK+
-#ifdef __X__
-
-#ifdef __VMS__ // Xlib.h for VMS is not (yet) compatible with C++
- // The resulting warnings are switched off here
-#pragma message disable nosimpint
-#endif
-// #include <X11/Xlib.h>
-#ifdef __VMS__
-#pragma message enable nosimpint
-#endif
+// use this function instead of the functions above in implementation code
+inline struct _XDisplay *wxGetX11Display()
+{
+ return (_XDisplay *)wxGetDisplay();
+}
-#endif //__X__
+#endif // X11 || wxGTK
#endif // wxUSE_GUI
// Error message functions used by wxWidgets (deprecated, use wxLog)
// ----------------------------------------------------------------------------
-#if WXWIN_COMPATIBILITY_2_2
-
-// Format a message on the standard error (UNIX) or the debugging
-// stream (Windows)
-wxDEPRECATED( WXDLLIMPEXP_BASE void wxDebugMsg(const wxChar *fmt ...) ATTRIBUTE_PRINTF_1 );
-
-// Non-fatal error (continues)
-extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxInternalErrorStr;
-wxDEPRECATED( WXDLLIMPEXP_BASE void wxError(const wxString& msg, const wxString& title = wxInternalErrorStr) );
-
-// Fatal error (exits)
-extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxFatalErrorStr;
-wxDEPRECATED( WXDLLIMPEXP_BASE void wxFatalError(const wxString& msg, const wxString& title = wxFatalErrorStr) );
-
-#endif // WXWIN_COMPATIBILITY_2_2
-
#endif
// _WX_UTILSH__
projects / wxWidgets.git / blobdiff