/////////////////////////////////////////////////////////////////////////////
// Name: samples/console/console.cpp
-// Purpose: a sample console (as opposed to GUI) progam using wxWindows
+// Purpose: A sample console (as opposed to GUI) program using wxWidgets
// Author: Vadim Zeitlin
// Modified by:
// Created: 04.10.99
// RCS-ID: $Id$
// Copyright: (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// headers
// ----------------------------------------------------------------------------
-#include <stdio.h>
+// For compilers that support precompilation, includes "wx/wx.h".
+#include "wx/wxprec.h"
-#include <wx/string.h>
-#include <wx/file.h>
-#include <wx/app.h>
-
-// ----------------------------------------------------------------------------
-// conditional compilation
-// ----------------------------------------------------------------------------
+#ifdef __BORLANDC__
+ #pragma hdrstop
+#endif
-// what to test?
+// for all others, include the necessary headers (this file is usually all you
+// need because it includes almost all "standard" wxWidgets headers)
+#ifndef WX_PRECOMP
+ #include "wx/wx.h"
+#endif
-//#define TEST_ARRAYS
-#define TEST_DIR
-//#define TEST_LOG
-//#define TEST_MIME
-//#define TEST_STRINGS
-//#define TEST_THREADS
-//#define TEST_TIME
-//#define TEST_LONGLONG
+#include <wx/app.h>
+#include <wx/cmdline.h>
// ============================================================================
// implementation
// ============================================================================
-// ----------------------------------------------------------------------------
-// wxDir
-// ----------------------------------------------------------------------------
-
-#ifdef TEST_DIR
-
-#include <wx/dir.h>
-
-static void TestDirEnumHelper(wxDir& dir,
- int flags = wxDIR_DEFAULT,
- const wxString& filespec = wxEmptyString)
-{
- wxString filename;
-
- if ( !dir.IsOpened() )
- return;
-
- bool cont = dir.GetFirst(&filename, filespec, flags);
- while ( cont )
- {
- printf("\t%s\n", filename.c_str());
-
- cont = dir.GetNext(&filename);
- }
-
- puts("");
-}
-
-static void TestDirEnum()
-{
- wxDir dir(wxGetCwd());
-
- puts("Enumerating everything in current directory:");
- TestDirEnumHelper(dir);
-
- puts("Enumerating really everything in current directory:");
- TestDirEnumHelper(dir, wxDIR_DEFAULT | wxDIR_DOTDOT);
-
- puts("Enumerating object files in current directory:");
- TestDirEnumHelper(dir, wxDIR_DEFAULT, "*.o");
-
- puts("Enumerating directories in current directory:");
- TestDirEnumHelper(dir, wxDIR_DIRS);
-
- puts("Enumerating files in current directory:");
- TestDirEnumHelper(dir, wxDIR_FILES);
-
- puts("Enumerating files including hidden in current directory:");
- TestDirEnumHelper(dir, wxDIR_FILES | wxDIR_HIDDEN);
-
-#ifdef __UNIX__
- dir.Open("/");
-#elif defined(__WXMSW__)
- dir.Open("c:\\");
-#else
- #error "don't know where the root directory is"
-#endif
-
- puts("Enumerating everything in root directory:");
- TestDirEnumHelper(dir, wxDIR_DEFAULT);
-
- puts("Enumerating directories in root directory:");
- TestDirEnumHelper(dir, wxDIR_DIRS);
-
- puts("Enumerating files in root directory:");
- TestDirEnumHelper(dir, wxDIR_FILES);
-
- puts("Enumerating files including hidden in root directory:");
- TestDirEnumHelper(dir, wxDIR_FILES | wxDIR_HIDDEN);
-
- puts("Enumerating files in non existing directory:");
- wxDir dirNo("nosuchdir");
- TestDirEnumHelper(dirNo);
-}
-
-#endif // TEST_DIR
-
-// ----------------------------------------------------------------------------
-// MIME types
-// ----------------------------------------------------------------------------
-
-#ifdef TEST_MIME
-
-#include <wx/mimetype.h>
-
-static void TestMimeEnum()
-{
- wxMimeTypesManager mimeTM;
- wxArrayString mimetypes;
-
- size_t count = mimeTM.EnumAllFileTypes(mimetypes);
-
- printf("*** All %u known filetypes: ***\n", count);
-
- wxArrayString exts;
- wxString desc;
-
- for ( size_t n = 0; n < count; n++ )
- {
- wxFileType *filetype = mimeTM.GetFileTypeFromMimeType(mimetypes[n]);
- if ( !filetype )
- {
- printf("nothing known about the filetype '%s'!\n",
- mimetypes[n].c_str());
- continue;
- }
-
- filetype->GetDescription(&desc);
- filetype->GetExtensions(exts);
-
- wxString extsAll;
- for ( size_t e = 0; e < exts.GetCount(); e++ )
- {
- if ( e > 0 )
- extsAll << _T(", ");
- extsAll += exts[e];
- }
-
- printf("\t%s: %s (%s)\n",
- mimetypes[n].c_str(), desc.c_str(), extsAll.c_str());
- }
-}
-
-#endif // TEST_MIME
-
-// ----------------------------------------------------------------------------
-// long long
-// ----------------------------------------------------------------------------
-
-#ifdef TEST_LONGLONG
-
-#include <wx/longlong.h>
-#include <wx/timer.h>
-
-static void TestSpeed()
-{
- static const long max = 100000000;
- long n;
-
- {
- wxStopWatch sw;
-
- long l = 0;
- for ( n = 0; n < max; n++ )
- {
- l += n;
- }
-
- printf("Summing longs took %ld milliseconds.\n", sw.Time());
- }
-
- {
- wxStopWatch sw;
-
- __int64 l = 0;
- for ( n = 0; n < max; n++ )
- {
- l += n;
- }
-
- printf("Summing __int64s took %ld milliseconds.\n", sw.Time());
- }
-
- {
- wxStopWatch sw;
-
- wxLongLong l;
- for ( n = 0; n < max; n++ )
- {
- l += n;
- }
-
- printf("Summing wxLongLongs took %ld milliseconds.\n", sw.Time());
- }
-}
-
-static void TestDivision()
-{
- #define MAKE_LL(x1, x2, x3, x4) wxLongLong((x1 << 16) | x2, (x3 << 16) | x3)
-
- // seed pseudo random generator
- //srand((unsigned)time(NULL));
-
- size_t nTested = 0;
- for ( size_t n = 0; n < 10000; n++ )
- {
- // get a random wxLongLong (shifting by 12 the MSB ensures that the
- // multiplication will not overflow)
- wxLongLong ll = MAKE_LL((rand() >> 12), rand(), rand(), rand());
-
- wxASSERT( (ll * 1000l)/1000l == ll );
-
- nTested++;
- }
-
- printf("\n*** Tested %u divisions/multiplications: ok\n", nTested);
-
- #undef MAKE_LL
-}
-
-#endif // TEST_LONGLONG
-
-// ----------------------------------------------------------------------------
-// date time
-// ----------------------------------------------------------------------------
-
-#ifdef TEST_TIME
-
-#include <wx/datetime.h>
-
-// this test miscellaneous static wxDateTime functions
-static void TestTimeStatic()
-{
- puts("\n*** wxDateTime static methods test ***");
-
- // some info about the current date
- int year = wxDateTime::GetCurrentYear();
- printf("Current year %d is %sa leap one and has %d days.\n",
- year,
- wxDateTime::IsLeapYear(year) ? "" : "not ",
- wxDateTime::GetNumberOfDays(year));
-
- wxDateTime::Month month = wxDateTime::GetCurrentMonth();
- printf("Current month is '%s' ('%s') and it has %d days\n",
- wxDateTime::GetMonthName(month, TRUE).c_str(),
- wxDateTime::GetMonthName(month).c_str(),
- wxDateTime::GetNumberOfDays(month));
-
- // leap year logic
- static const size_t nYears = 5;
- static const size_t years[2][nYears] =
- {
- // first line: the years to test
- { 1990, 1976, 2000, 2030, 1984, },
-
- // second line: TRUE if leap, FALSE otherwise
- { FALSE, TRUE, TRUE, FALSE, TRUE }
- };
-
- for ( size_t n = 0; n < nYears; n++ )
- {
- int year = years[0][n];
- bool should = years[1][n] != 0;
-
- printf("Year %d is %sa leap year (should be: %s)\n",
- year,
- wxDateTime::IsLeapYear(year) ? "" : "not ",
- should ? "yes" : "no");
-
- wxASSERT( should == wxDateTime::IsLeapYear(year) );
- }
-}
-
-// test constructing wxDateTime objects
-static void TestTimeSet()
-{
- puts("\n*** wxDateTime construction test ***");
-
- printf("Current time:\t%s\n", wxDateTime::Now().Format().c_str());
- printf("Unix epoch:\t%s\n", wxDateTime((time_t)0).Format().c_str());
- printf("Today noon:\t%s\n", wxDateTime(12, 0).Format().c_str());
- printf("May 29, 1976:\t%s\n", wxDateTime(29, wxDateTime::May, 1976).Format().c_str());
-}
-
-// test time zones stuff
-static void TestTimeZones()
-{
- puts("\n*** wxDateTime timezone test ***");
-
- wxDateTime now = wxDateTime::Now();
-
- printf("Current GMT time:\t%s\n", now.ToGMT().Format().c_str());
- printf("Unix epoch (GMT):\t%s\n", wxDateTime((time_t)0).MakeGMT().Format().c_str());
- printf("Current time in Paris:\t%s\n", now.ToTimezone(wxDateTime::CET).Format().c_str());
- printf(" Moscow:\t%s\n", now.ToTimezone(wxDateTime::MSK).Format().c_str());
- printf(" New York:\t%s\n", now.ToTimezone(wxDateTime::EST).Format().c_str());
-}
-
-// test some minimal support for the dates outside the standard range
-static void TestTimeRange()
-{
- puts("\n*** wxDateTime out-of-standard-range dates test ***");
-
- printf("Unix epoch:\t%s\n",
- wxDateTime(2440587.5).Format().c_str());
- printf("Feb 29, 0: \t%s\n",
- wxDateTime(29, wxDateTime::Feb, 0).Format().c_str());
- printf("JDN 0: \t%s\n",
- wxDateTime(0.0).Format().c_str());
- printf("Jan 1, 1AD:\t%s\n",
- wxDateTime(1, wxDateTime::Jan, 1).Format().c_str());
- printf("May 29, 2099:\t%s\n",
- wxDateTime(29, wxDateTime::May, 2099).Format().c_str());
-}
-
-// test conversions to JDN &c
-static void TestTimeJDN()
-{
- puts("\n*** wxDateTime to JDN test ***");
-
- struct Date
- {
- wxDateTime::wxDateTime_t day;
- wxDateTime::Month month;
- int year;
- double jdn;
- };
-
- static const Date testDates[] =
- {
- { 21, wxDateTime::Jan, 2222, 2532648.5 },
- { 29, wxDateTime::May, 1976, 2442927.5 },
- { 1, wxDateTime::Jan, 1970, 2440587.5 },
- { 1, wxDateTime::Jan, 1900, 2415020.5 },
- { 15, wxDateTime::Oct, 1582, 2299160.5 },
- { 4, wxDateTime::Oct, 1582, 2299149.5 },
- { 1, wxDateTime::Mar, 1, 1721484.5 },
- { 1, wxDateTime::Jan, 1, 1721425.5 },
- { 31, wxDateTime::Dec, 0, 1721424.5 },
- { 1, wxDateTime::Jan, 0, 1721059.5 },
- { 12, wxDateTime::Aug, -1234, 1270573.5 },
- { 12, wxDateTime::Aug, -4000, 260313.5 },
- { 24, wxDateTime::Nov, -4713, -0.5 },
- };
-
- for ( size_t n = 0; n < WXSIZEOF(testDates); n++ )
- {
- const Date& d = testDates[n];
- wxDateTime dt(d.day, d.month, d.year);
- double jdn = dt.GetJulianDayNumber();
-
- printf("JDN of %s %02d, %4d%s is:\t%f",
- wxDateTime::GetMonthName(d.month).c_str(),
- d.day,
- wxDateTime::ConvertYearToBC(d.year),
- d.year > 0 ? "AD" : "BC",
- jdn);
- if ( jdn == d.jdn )
- {
- puts(" (ok)");
- }
- else
- {
- printf(" (ERROR: should be %f, delta = %f)\n",
- d.jdn, jdn - d.jdn);
- }
- }
-}
-
-#endif // TEST_TIME
-
-// ----------------------------------------------------------------------------
-// threads
-// ----------------------------------------------------------------------------
-
-#ifdef TEST_THREADS
-
-#include <wx/thread.h>
-
-static size_t gs_counter = (size_t)-1;
-static wxCriticalSection gs_critsect;
-static wxCondition gs_cond;
-
-class MyJoinableThread : public wxThread
+static const wxCmdLineEntryDesc cmdLineDesc[] =
{
-public:
- MyJoinableThread(size_t n) : wxThread(wxTHREAD_JOINABLE)
- { m_n = n; Create(); }
+ { wxCMD_LINE_SWITCH, "h", "help", "show this help message",
+ wxCMD_LINE_VAL_NONE, wxCMD_LINE_OPTION_HELP },
+ { wxCMD_LINE_SWITCH, "d", "dummy", "a dummy switch" },
+ // ... your other command line options here...
- // thread execution starts here
- virtual ExitCode Entry();
-
-private:
- size_t m_n;
+ { wxCMD_LINE_NONE }
};
-wxThread::ExitCode MyJoinableThread::Entry()
-{
- unsigned long res = 1;
- for ( size_t n = 1; n < m_n; n++ )
- {
- res *= n;
-
- // it's a loooong calculation :-)
- Sleep(100);
- }
-
- return (ExitCode)res;
-}
-
-class MyDetachedThread : public wxThread
+int main(int argc, char **argv)
{
-public:
- MyDetachedThread(size_t n, char ch)
- {
- m_n = n;
- m_ch = ch;
- m_cancelled = FALSE;
-
- Create();
- }
-
- // thread execution starts here
- virtual ExitCode Entry();
+ wxApp::CheckBuildOptions(WX_BUILD_OPTIONS_SIGNATURE, "program");
- // and stops here
- virtual void OnExit();
-
-private:
- size_t m_n; // number of characters to write
- char m_ch; // character to write
-
- bool m_cancelled; // FALSE if we exit normally
-};
-
-wxThread::ExitCode MyDetachedThread::Entry()
-{
+ wxInitializer initializer;
+ if ( !initializer )
{
- wxCriticalSectionLocker lock(gs_critsect);
- if ( gs_counter == (size_t)-1 )
- gs_counter = 1;
- else
- gs_counter++;
+ fprintf(stderr, "Failed to initialize the wxWidgets library, aborting.");
+ return -1;
}
- for ( size_t n = 0; n < m_n; n++ )
+ wxCmdLineParser parser(cmdLineDesc, argc, argv);
+ switch ( parser.Parse() )
{
- if ( TestDestroy() )
- {
- m_cancelled = TRUE;
-
+ case -1:
+ // help was given, terminating
break;
- }
-
- putchar(m_ch);
- fflush(stdout);
-
- wxThread::Sleep(100);
- }
-
- return 0;
-}
-
-void MyDetachedThread::OnExit()
-{
- wxLogTrace("thread", "Thread %ld is in OnExit", GetId());
-
- wxCriticalSectionLocker lock(gs_critsect);
- if ( !--gs_counter && !m_cancelled )
- gs_cond.Signal();
-}
-
-void TestDetachedThreads()
-{
- puts("\n*** Testing detached threads ***");
-
- static const size_t nThreads = 3;
- MyDetachedThread *threads[nThreads];
- size_t n;
- for ( n = 0; n < nThreads; n++ )
- {
- threads[n] = new MyDetachedThread(10, 'A' + n);
- }
-
- threads[0]->SetPriority(WXTHREAD_MIN_PRIORITY);
- threads[1]->SetPriority(WXTHREAD_MAX_PRIORITY);
-
- for ( n = 0; n < nThreads; n++ )
- {
- threads[n]->Run();
- }
-
- // wait until all threads terminate
- gs_cond.Wait();
-
- puts("");
-}
-
-void TestJoinableThreads()
-{
- puts("\n*** Testing a joinable thread (a loooong calculation...) ***");
-
- // calc 10! in the background
- MyJoinableThread thread(10);
- thread.Run();
-
- printf("\nThread terminated with exit code %lu.\n",
- (unsigned long)thread.Wait());
-}
-
-void TestThreadSuspend()
-{
- puts("\n*** Testing thread suspend/resume functions ***");
-
- MyDetachedThread *thread = new MyDetachedThread(15, 'X');
-
- thread->Run();
-
- // this is for this demo only, in a real life program we'd use another
- // condition variable which would be signaled from wxThread::Entry() to
- // tell us that the thread really started running - but here just wait a
- // bit and hope that it will be enough (the problem is, of course, that
- // the thread might still not run when we call Pause() which will result
- // in an error)
- wxThread::Sleep(300);
-
- for ( size_t n = 0; n < 3; n++ )
- {
- thread->Pause();
-
- puts("\nThread suspended");
- if ( n > 0 )
- {
- // don't sleep but resume immediately the first time
- wxThread::Sleep(300);
- }
- puts("Going to resume the thread");
-
- thread->Resume();
- }
-
- puts("Waiting until it terminates now");
-
- // wait until the thread terminates
- gs_cond.Wait();
-
- puts("");
-}
-
-void TestThreadDelete()
-{
- // As above, using Sleep() is only for testing here - we must use some
- // synchronisation object instead to ensure that the thread is still
- // running when we delete it - deleting a detached thread which already
- // terminated will lead to a crash!
-
- puts("\n*** Testing thread delete function ***");
-
- MyDetachedThread *thread0 = new MyDetachedThread(30, 'W');
-
- thread0->Delete();
-
- puts("\nDeleted a thread which didn't start to run yet.");
-
- MyDetachedThread *thread1 = new MyDetachedThread(30, 'Y');
-
- thread1->Run();
-
- wxThread::Sleep(300);
-
- thread1->Delete();
-
- puts("\nDeleted a running thread.");
-
- MyDetachedThread *thread2 = new MyDetachedThread(30, 'Z');
-
- thread2->Run();
-
- wxThread::Sleep(300);
-
- thread2->Pause();
-
- thread2->Delete();
- puts("\nDeleted a sleeping thread.");
-
- MyJoinableThread thread3(20);
- thread3.Run();
-
- thread3.Delete();
-
- puts("\nDeleted a joinable thread.");
-
- MyJoinableThread thread4(2);
- thread4.Run();
-
- wxThread::Sleep(300);
-
- thread4.Delete();
-
- puts("\nDeleted a joinable thread which already terminated.");
-
- puts("");
-}
-
-#endif // TEST_THREADS
-
-// ----------------------------------------------------------------------------
-// arrays
-// ----------------------------------------------------------------------------
-
-#ifdef TEST_ARRAYS
-
-void PrintArray(const char* name, const wxArrayString& array)
-{
- printf("Dump of the array '%s'\n", name);
-
- size_t nCount = array.GetCount();
- for ( size_t n = 0; n < nCount; n++ )
- {
- printf("\t%s[%u] = '%s'\n", name, n, array[n].c_str());
- }
-}
-
-#endif // TEST_ARRAYS
-
-// ----------------------------------------------------------------------------
-// strings
-// ----------------------------------------------------------------------------
-
-#ifdef TEST_STRINGS
-
-#include "wx/timer.h"
-
-void TestString()
-{
- wxStopWatch sw;
-
- wxString a, b, c;
-
- a.reserve (128);
- b.reserve (128);
- c.reserve (128);
-
- for (int i = 0; i < 1000000; ++i)
- {
- a = "Hello";
- b = " world";
- c = "! How'ya doin'?";
- a += b;
- a += c;
- c = "Hello world! What's up?";
- if (c != a)
- c = "Doh!";
- }
-
- printf ("TestString elapsed time: %ld\n", sw.Time());
-}
-
-void TestPChar()
-{
- wxStopWatch sw;
-
- char a [128];
- char b [128];
- char c [128];
-
- for (int i = 0; i < 1000000; ++i)
- {
- strcpy (a, "Hello");
- strcpy (b, " world");
- strcpy (c, "! How'ya doin'?");
- strcat (a, b);
- strcat (a, c);
- strcpy (c, "Hello world! What's up?");
- if (strcmp (c, a) == 0)
- strcpy (c, "Doh!");
- }
-
- printf ("TestPChar elapsed time: %ld\n", sw.Time());
-}
-
-#endif // TEST_STRINGS
-
-// ----------------------------------------------------------------------------
-// entry point
-// ----------------------------------------------------------------------------
+ case 0:
+ // everything is ok; proceed
+ if (parser.Found("d"))
+ {
+ wxPrintf("Dummy switch was given...\n");
+
+ while (1)
+ {
+ wxChar input[128];
+ wxPrintf("Try to guess the magic number (type 'quit' to escape): ");
+ if ( !wxFgets(input, WXSIZEOF(input), stdin) )
+ break;
+
+ // kill the last '\n'
+ input[wxStrlen(input) - 1] = 0;
+
+ if (wxStrcmp(input, "quit") == 0)
+ break;
+
+ long val;
+ if (!wxString(input).ToLong(&val))
+ {
+ wxPrintf("Invalid number...\n");
+ continue;
+ }
+
+ if (val == 42)
+ wxPrintf("You guessed!\n");
+ else
+ wxPrintf("Bad luck!\n");
+ }
+ }
+ break;
-int main(int argc, char **argv)
-{
- if ( !wxInitialize() )
- {
- fprintf(stderr, "Failed to initialize the wxWindows library, aborting.");
+ default:
+ break;
}
-#ifdef TEST_STRINGS
- TestPChar();
- TestString();
-#endif // TEST_STRINGS
-
-#ifdef TEST_ARRAYS
- wxArrayString a1;
- a1.Add("tiger");
- a1.Add("cat");
- a1.Add("lion");
- a1.Add("dog");
- a1.Add("human");
- a1.Add("ape");
-
- puts("*** Initially:");
-
- PrintArray("a1", a1);
-
- wxArrayString a2(a1);
- PrintArray("a2", a2);
-
- wxSortedArrayString a3(a1);
- PrintArray("a3", a3);
-
- puts("*** After deleting a string from a1");
- a1.Remove(2);
-
- PrintArray("a1", a1);
- PrintArray("a2", a2);
- PrintArray("a3", a3);
-
- puts("*** After reassigning a1 to a2 and a3");
- a3 = a2 = a1;
- PrintArray("a2", a2);
- PrintArray("a3", a3);
-#endif // TEST_ARRAYS
-
-#ifdef TEST_DIR
- TestDirEnum();
-#endif // TEST_DIR
-
-#ifdef TEST_LOG
- wxString s;
- for ( size_t n = 0; n < 8000; n++ )
+ if ( argc == 1 )
{
- s << (char)('A' + (n % 26));
+ // If there were no command-line options supplied, emit a message
+ // otherwise it's not obvious that the sample ran successfully
+ wxPrintf("Welcome to the wxWidgets 'console' sample!\n");
+ wxPrintf("For more information, run it again with the --help option\n");
}
- wxString msg;
- msg.Printf("A very very long message: '%s', the end!\n", s.c_str());
-
- // this one shouldn't be truncated
- printf(msg);
-
- // but this one will because log functions use fixed size buffer
- // (note that it doesn't need '\n' at the end neither - will be added
- // by wxLog anyhow)
- wxLogMessage("A very very long message 2: '%s', the end!", s.c_str());
-#endif // TEST_LOG
-
-#ifdef TEST_THREADS
- int nCPUs = wxThread::GetCPUCount();
- printf("This system has %d CPUs\n", nCPUs);
- if ( nCPUs != -1 )
- wxThread::SetConcurrency(nCPUs);
-
- if ( argc > 1 && argv[1][0] == 't' )
- wxLog::AddTraceMask("thread");
-
- if ( 1 )
- TestDetachedThreads();
- if ( 1 )
- TestJoinableThreads();
- if ( 1 )
- TestThreadSuspend();
- if ( 1 )
- TestThreadDelete();
-
-#endif // TEST_THREADS
-
-#ifdef TEST_LONGLONG
- if ( 0 )
- TestSpeed();
- if ( 1 )
- TestDivision();
-#endif // TEST_LONGLONG
-
-#ifdef TEST_MIME
- TestMimeEnum();
-#endif // TEST_MIME
-
-#ifdef TEST_TIME
- TestTimeStatic();
- TestTimeSet();
- TestTimeZones();
- TestTimeRange();
- TestTimeJDN();
-#endif // TEST_TIME
-
- wxUninitialize();
+ // do something useful here
return 0;
}
projects / wxWidgets.git / blobdiff