TweetFollow Us on Twitter

Modern DebugStr
Volume Number:12
Issue Number:9
Column Tag:Debugging Aids

DebugStr, the Modern Way

Capturing your program’s iostream of consciousness

By Jon Kalb

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

I have a friend who spends most of his time in cutting-edge (read, “reliable tools not yet available”) environments. He likes to say: “There is no debugger; there is only DebugStr.” While he may stretch the truth, he has a point. Our friends who build source-level debugging tools are a heroic lot, but there are times when MacsBug is the only option. This article, along with the accompanying dout Library, is one attempt to make using DebugStr a little more modern.

Using DebugStr is usually a clumsy process of converting integer values to strings and concatenating Pascal strings. There had to be a better way, I thought. That’s when it occurred to me to implement the low-level debugger as a C++ output stream.

The Solution Domain

This approach may be valuable for two groups: fellow users of DebugStr, and individuals interested in using and/or implementing C++ streams. But first, some limitations:

• I use the term “library” rather loosely. The dout Library is really just a small collection of source files. I also include project files for both Metrowerks and Symantec, to demonstrate how to use the library.

• In no way does this library replace a source-level debugger. If it is possible for you to use one, do so.

• Although, for the sake of clarity, I don’t follow this practice in this article, in real code your should always surround every use of the dout stream with some type of #ifndef NDEBUG statement. (NDEBUG is the preprocessor variable that controls the assert macro found in assert.h. Define NDEBUG for shipping code, and leave it undefined for code under development.) To make this task a little easier, the dout Library includes the data statement macro, ds. For example, the line “ds(dout << myObject);” would be completely stripped if NDEBUG was defined, and would become “dout << myObject;” if NDEBUG wasn’t defined.

• Streaming the semicolon character ';' to dout is problematic. MacsBug interprets the text following a semicolon as a MacsBug command, and attempts to execute text that you intended to display.

• Below are examples of overloading the insertion operator for objects to support debugging in a streams environment. This is possible if your code base doesn’t already use insertion operator overloading for other purposes. It may be possible to use the same routine for, say, storing an object to disk and for debugging purposes, but it seems unlikely. I suggest a work-around later.

• Streaming data to dout in the constructor of a static or global object (an object that is constructed before the first line of main is executed) is problematic. More on this below.

Using the Library

To use the dout Library you must include the standard C++ iostreams and the source file debugbuf.cp. Each source file that writes to the dout stream must include the header file doutstream.

Standard Streams

You can use dout just as you would cout. For example:

#include "doutstream"
// ...
dout << "file corrupted at offset " << byteOffset << endl;
// ...
dout << "name: " << un << endl << "password: " << pw << endl;
// ...
dout << "completed pass " << i << " of " << total << endl;
// ...

You can use dout just like any standard C++ output stream, but, since the debugger is more than just a byte sink, we should be able to do more, and we can.

The dout Difference

The library defines a set of symbols that cause the stream to behave in interesting ways. Normally, the stream buffers characters until it fills a line (arbitrarily defined as 60 characters) or until the caller streams an endl. You can flush this buffer at any time by streaming an endl. (endl is the standard C++ streams manipulator function for advancing to the next line.) dout produces a blank line if there is currently no text in the stream’s buffer. To flush the buffer without creating blank lines, stream the constant doutsoftflush ('\r').

dout supports both horizontal and vertical tabs when streaming douttab ('\t') or doutverttab ('\v'). Streaming doutformfeed ('\f') flushes the buffer and inserts a line of underscores. Streaming doutbackspace ('\b') “eats” the last character in the buffer. Streaming doutsysbeep ('\a') calls SysBeep; however, just like other data, this is buffered. (To beep immediately, follow doutsysbeep with endl.)

Streaming data to dout doesn’t normally suspend your program the way that a call to DebugStr would. If you want to drop into the debugger, then stream either doutdebug ('\0') or doutdropin ('\0'). These are synonyms; either one will flush the buffer and leave you in the debugger with your application suspended. (Streaming the End-of-Text character ('\x03'), usually associated with the Enter key, will do the same thing.)

As a side-effect of using MacsBug for streaming output, we can execute MacsBug commands. If a semicolon appears in the data stream, MacsBug attempts to execute the text that follows as a MacsBug command. (This can produce unexpected results if the data you are streaming just happens to contain a semicolon.) Several commands can be executed in sequence as long as each command is preceded by a semicolon.

Although you can use the dout Library in conjunction with source-level debuggers (products from Jasik, Metrowerks and Symantec support capturing messages sent with DebugStr), only MacsBug is going to be able to interpret and execute MacsBug commands.

This is an example of using dout to execute MacsBug commands.

dout << doutcommand << "hc" << doutsoftflush;
// ...
dout << doutcommand << "dm #";
dout << (unsigned long)aPointer << endl;

Note the use of the constant doutcommand (';'), and that the stream buffer is flushed (with either endl or doutsoftflush) after each command. In this example, MacsBug executes the Heap Check command, and displays memory from the location pointed to by aPointer. The default behavior for commands is to execute the command and continue program execution. In the case of Heap Check, MacsBug suspends the execution of your program if the Heap Check finds that the heap is corrupted.

For my purposes this alone would justify using the library. The library handles conversion of integer values, there is no fooling with Pascal strings, and, the C++ implementation gives us type checking without worry. But, as they say on the infomercials: Wait, there’s more.

Extending Streams

Using C++ means that we also get extensibility.

I have included streamstructsmac.h and streamstructsmac.cp as an example of how to stream standard Macintosh types (or any structure). This is not an attempt to define insertion routines for all Macintosh Toolbox structures, only an example to show you how to declare and define insertion routines for structures that you may find useful.

Listing 1: streamstructmac.h

Declarations of Insertion Operators for Point, Rect, and BitMap

The following declarations allow Points, Rects, and BitMaps to be streamed out.

#include <iostream.h>
#include <QuickDraw.h>

// inserters

ostream &operator<<(ostream &stream, const Point &rhs);

ostream &operator<<(ostream &stream, const Rect &rhs);

ostream &operator<<(ostream &stream, const BitMap &rhs);

This is the standard way to implement insertion operator overloading to standard C++ library streams. Note that there is nothing specific to the dout Library in this set of declarations (or even in the implementation that follows). These same routines could be used to stream structures of these types to any C++ ostream.

Listing 2: streamstructmac.cp

Definitions of Insertion Operators for Point, Rect, and BitMap

The following definitions allow Points, Rects, and BitMaps to be streamed out.

#include "streamstructsmac.h"

// inserters

ostream &operator<<(ostream &stream, const Point &rhs)
{
 stream << ".v(" << rhs.v << ") ";
 stream << ".h(" << rhs.h << ") ";
 return stream;
}

ostream &operator<<(ostream &stream, const Rect &rhs)
{
 stream << ".t(" << rhs.top << ") ";
 stream << ".l(" << rhs.left<< ") ";
 stream << ".b(" << rhs.bottom<< ") ";
 stream << ".r(" << rhs.right << ") ";
 return stream;
}

ostream &operator<<(ostream &stream, const BitMap &rhs)
{
 stream << ".baseAddr(" << (void *)rhs.baseAddr << ") ";
 stream << ".rowBytes(" << rhs.rowBytes<< ")\n";
 stream << ".bounds(" << rhs.bounds<< ") ";
 return stream;
}

Note that the BitMap insertion function calls the Rect insertion function without any special syntax. C++’s ability to extend the language syntax to user-defined types allows this.

The style that I use shows the field names (preceded with a '.') followed by the value of the field in parentheses. Sample output for a Point, a Rect, and a BitMap, might look like this:

.v(1) .h(2) 
.t(3) .l(4) .b(5) .r(6) 
.baseAddr(0x12345678) .rowBytes(7)
.bounds(.t(3) .l(4) .b(5) .r(6) )

This is all you need to know to use streams with structs or classes that either have no private or protected members or provide accessors for all such members. But what if you want to stream private members? This situation will arise often as you develop your own classes. The solution is to implement the insertion operator overload as always, and declare it as a friend function when declaring your class. A trivial but complete example of this is included in the source files as the class privateMembers.

Suppose that you have already defined insertion operator functions for some purpose other than debugging. For example, if you are streaming objects for persistent storage, the streamed form of your objects may not be what you would like to see streamed into the debugger. One way to work around this problem is to subclass the ostream class and make dout an object of this new subclass. Now, instead of defining the insertion operator in terms of an ostream, create an insertion operator function based on the new subclass.

The Implementation

The first thing to know about the implementation of dout is that dout is a standard C++ library ostream. Stream objects are responsible for taking inserted data, formatting it, and passing it to objects of type streambuf. It is the streambuf object that decides where the data ultimately ends up. By subclassing streambuf, we make dout possible. The library contains a debugbuf class that inherits from streambuf.

The following code, from the top of the debugbuf.cp file shows the relationships of these objects:

static debugbuf debugstream;
ostream dout(&debugstream);

dout is a standard ostream. Like all ostreams it requires a streambuf object to function; so, in the constructor, we pass the address of an object of type debugbuf, which is derived from streambuf. All of our work is done in the object of type debugbuf.

Class Declarations

The first thing to notice about the declaration of the debugbuf class is that no destructor or constructors are declared. Let’s ignore this for the moment and look at the virtual functions inherited from streambuf in the protected section.

Listing 3: debugbuf.h

Declarations of debugbuf and debugbufinit

For debugbuf, virtual member functions of streambuf are declared as well as private members required for 
implementation. For debugbufinit the declaration does not have a memory footprint.

class debugbuf: public streambuf
{
 public:

    //debugbuf();
    //virtual ~debugbuf();

    // Construction and destruction are really handled by class debugbufinit. 
    // Initialization is done in the private routine init().

 protected:

    // These protected member functions are virtual functions in the parent 
    // (streambuf) class that we override to create our behavior.

    // The name overflow may be confusing -- this just outputs a character to the 
    // stream.
    // Calls outputchar().

 virtual int overflow(int c = EOF);

    // Since this is not an input stream, we want both pbackfail() and underflow() to 
    // return EOF (thus indicating failure). It turns out that the default behavior (the 
    // base class implementation) does just that.

    //virtual int pbackfail(int c = EOF);
    //virtual int underflow();

    // we don’t do input so always return EOF
 virtual int uflow() {return EOF;}

    // we don’t do input so always return 0 chars read
 virtual int xsgetn(char *, int) {return 0;}

    // Calls outputchar() for each character.
 virtual int xsputn(const char *s, int n);

    // We use the default behavior which returns a streampos that is in an invalid 
    // position. We do not support repositioning on this stream.

    //virtual streampos seekoff(streamoff off,
    //                 ios::seekdir way,
    //                 ios::openmode which =
    //                 ios::in | ios::out);

    //virtual streampos seekpos(streampos sp,
    //                 ios::openmode which =
    //                 ios::in | ios::out);

    // We don’t support setting the buffer so we use the default which is just to 
    // return “this.”

    //virtual streambuf *setbuf(char *s, int n);

    // There is nothing to sync with, so we just do the default which is to return
    // zero, indicating no error.

    // virtual int sync();

    // Actually, as an alternative implementation it would be possible to use this 
    // function to call our soft flush routine. In practice, there would be no different 
    // result. sync() is usually only called by pubsync(), which is usually only called
    // by flush(), which is usually only called by the endl manipulator function after 
    // it has streamed ‘\n’. So the soft flush would always follow a hard flush and 
    // result in a no-op.

 private:
 enum
 {
 kMaxDebugStrReadableString = 60,
 kSizeOfSemicolonG = 2,
 kSizeOfLengthByte = 1,
 kTabSize = 5,
 kStop = true
 };

    // the buffer
 char pbeg[ kSizeOfLengthByte +
 kMaxDebugStrReadableString +
 kSizeOfSemic olonG];

    // location of the next streamed char
 char *pnext;

    // This always points to the end of the readable string buffer. Once it is set in 
    // init(), it is never modified
 char *pend;

    // the number of queued alerts
 int alertCount;

 void init();

 void outputchar(char c);
 void formfeed();
 void horztab();
 void backspace();
 void verttab();
 void alert();
 void addchar(char c);
 void softflush();
 void flushdebugstring(int stop = false);
 void flushalerts();

 friend class debugbufinit;
};

class debugbufinit
{
 static unsigned int count;
 public:
 debugbufinit();

    // Our destructor is not virtual. It is important that objects of this class have no 
    // memory footprint. We will end up with one object of this class per translation 
    // unit (.cp file). If this class has any virtual member functions then objects of 
    // this class would have v tables in memory. Since this is not intended to be a 
    // base class for other class, there is no need to be virtual.

 ~debugbufinit();
};

Of the virtual functions we inherited from streambuf, four are for input, which we don’t support. For two, pbackfail and underflow, we can just accept the default behavior, and for the other two, uflow and xsgetn, we write trivial routines that return values which indicate that reading is not supported. Two other functions, seekoff and seekpos, are for positioning the stream pointer - another feature that we can’t support. We also do not allow the caller to set our buffer, so setbuf is not supported. The sync function is also unneeded. The only routines that really do any work are overflow, which calls our private member outputchar once, and xsputn, which calls outputchar once for each character passed to it.

Our private section includes some constants defined as an enum, the buffer and the pointers that we need to manage it, a counter for buffering SysBeep calls, and our private functions. I’ll discuss the private member functions later.

We finally return to the observation that instead of constructors and a destructor for debugbuf, a separate class, the debugbufinit class, is declared. This attempts to work around a problem with static objects. Before explaining the problem and what I’ve done about it, let me point out that I have not implemented a complete solution. Do not stream to dout in the constructor of a static (or global) object unless you are prepared for your application to crash. This is called “crossing the streams”. See Ghostbusters.

dout is a static object and, like all static objects, its constructor will be called before the first line of main is executed. But the first line of main is not the first line of code that is executed. If a static object streams data to dout in its constructor, this code may be executed before dout is constructed.

There is no way to reliably order construction of static objects in different translation units (.cp files), but we do know that within translation units, static objects are constructed in the order in which they appear. That is why we have the class debugbufinit and why the header file doutstream declares a static object of this type. Note that it is not declared extern. Each translation unit that includes doutstream has its own object of type debugbufinit (which is why it is important that it does not have a memory footprint).

When the debugbufinit object is constructed, it uses its static member, count, to determine if it is the first object of its class to be constructed. If it is, then it calls the init member of the static debugstream object. The init member performs the function of a constructor for the debugbuf class. This way, debugstream gets constructed only once, at the time of the first construction of a debugbufinit object. Since init may be called before or after the real constructor is called, it is important that the constructor is a “no op”.

P.J. Plauger explains this problem, along with the solution used in his implementation of the standard library streams (cout, cin, and cerr), in his book, The Draft Standard C++ Library, which I recommend. Close inspection reveals why my implementation is not a complete solution. Although I can guarantee proper construction of the debugstream object, the same cannot be said for the dout object.

I suspect that a complete solution exists for both Metrowerks and for Symantec, but I do not believe that any single solution works for both. In any case, the complete solution is left as an exercise for the reader (I’ve always wanted to say that).

Member Function Definitions

As the listing for debugbuf.cp shows, the implementation of both debugbuf and debugbufinit is straightforward.

Listing 4: debugbuf.cp

Definitions of debugbuf and debugbufinit

The debugbuf class manages a buffer using a switch statement to differentiate between characters with 
special meanings.

#include "doutstream"

#include <string.h>// for strlen() and strcpy()
#include <OSUtils.h> // for SysBeep();

static debugbuf debugstream;
ostream dout(&debugstream);

unsigned int debugbufinit::count = 0;

// this is debug code -- performance is not a goal

void debugbuf::init() // called by friend class debugbufinit
{
 pbeg[0] = '\0';
 pnext = pbeg + kSizeOfLengthByte;
 pend = pnext + kMaxDebugStrReadableString;
 alertCount = 0;
}


int debugbuf::overflow(int c)
{
 if (EOF == c)
 {
 return '\0';  // returning EOF indicates an error
 }
 else
 {
 outputchar(c);
 return c;
 }
}


int debugbuf::xsputn(const char *s, int n)
{
 for (int i = 0; i < n; ++i)
 {
 outputchar(s[i]);
 }
 return n;// we always process all of the chars
}


void debugbuf::outputchar(char c)
{
 switch (c)
 {
 case '\b':
 backspace();
 break;
 case '\f':
 formfeed();
 break;
 case '\n':
 flushdebugstring();
 break;
 case '\r':
 softflush();
 break;
 case '\t':
 horztab();
 break;
 case '\v':
 verttab();
 break;
 case '\a':
 alert();
 break;
 case '\0':
 case '\x03':
 flushdebugstring(kStop);
 break;
 default:
 addchar(c);
 break;
 }
}


void debugbuf::backspace()
{
 if (pbeg[0])  // if the buffer is empty, don’t bother
 {
 --pnext; 
 --pbeg[0];
 }
    // note that alerts cannot be backspaced away -- a possible enhancement
}


void debugbuf::formfeed()
{
 softflush();
 strcpy(pbeg, (char *)
 "\p_______________________________________________");
 pnext += strlen(pnext);
 flushdebugstring();
}


// both horizontal and verticle tabbing is done by brute
// force -- performance is not a goal
void debugbuf::horztab()
{
    // we don’t wrap tabs so if we are within kTabSize of
    // the end of the buffer then we just flush
 if (pend - pnext <= kTabSize)
 {
 flushdebugstring();
 }
 else
 {
 for (int i = 0; i < kTabSize; ++i)
 {
 addchar(' ');
 }
 }
}


void debugbuf::verttab()
{
 int position = pnext - &pbeg[1];
 flushdebugstring();
 for (int i = 0; i < position; ++i)
 {
 addchar(' ');
 }
}


void debugbuf::alert()
{
 ++alertCount;
}


void debugbuf::addchar(char c)
{
 *pnext++ = c;
 ++pbeg[0];
 if (pnext == pend)
 {
 flushdebugstring();
 }
}


void debugbuf::softflush()
{
 if ('\0' != pbeg[0])
 {
 flushdebugstring();
 }
 else
 {
 flushalerts();
 }
}

void debugbuf::flushdebugstring(int stop)
{
 if (!stop)
 {
 addchar(';');
 addchar('g');
 }
 flushalerts();
 DebugStr((unsigned char *)pbeg);
 pbeg[0] = '\0';
 pnext = &pbeg[1];
}


void debugbuf::flushalerts()
{
 while (alertCount)
 {
 --alertCount;
 SysBeep(30);
 }
}

debugbufinit::debugbufinit()
{
 if (0 == count++)
 {
 debugstream.init();
 }
}

debugbufinit::~debugbufinit()
{
 if (0 == --count)
 {
    // nothing to dispose, but we should flush
 debugstream.softflush();
 }
}

The main entry points are the protected members overflow and xsputn, both of which call outputchar. outputchar uses a switch statement to call one the following if the character is “special”: flushdebugstring, softflush, formfeed, horztab, backspace, verttab, or alert. If the character is “normal” we call addchar.

• If the character being processed is doutbackspace ('\b'), we reduce the length of the Pascal string in the buffer by one and back up the pointer by one character. Of course, we check first to be certain that there is at least one character in the buffer.

• If the character being processed is doutformfeed ('\f'), we flush any characters already in the buffer, fill the buffer with underscores, then flush the underscores.

• If the character being processed is a horizontal tab or douttab ('\t'), we treat it as if it were kTabSize (5) spaces, except that we don’t wrap remaining spaces to the next line. We don’t support tab stops.

• If the character being processed is a vertical tab or doutverttab ('\v'), we calculate how many characters are currently in the buffer, flush the buffer, and add a space character for each character that had been in the buffer.

• If the character being processed is an alert ('\a'), we increment the alert counter. Since all alerts are the same (just a call to SysBeep), we can “buffer” them with just a counter.

• If the character being processed is “normal”, we process it in addchar. The new character is added to the end of the Pascal string in our buffer. When the string fills the readable string buffer, we flush the buffer by calling flushdebugstring.

Notice that I said “the readable string buffer”. The buffer is actually two bytes larger than the largest Pascal string that we can handle. This is to save room to append a semicolon and the letter “g”.

Usually when DebugStr is called, MacsBug displays the Pascal string that is passed to it and waits for commands from the user. This is not really the behavior that we want. We want the string stored in the MacsBug buffer, but we don’t want to stop the application and drop into MacsBug every time data is streamed to dout. To work around this, we take advantage of the DebugStr/MacsBug command processing feature. When MacsBug receives the string passed to it by DebugStr, it displays the contents of the string up to, but not including, the first semicolon (if there is one). Any characters after the semicolon are treated as a command for MacsBug to execute.

By appending “;g” to the string passed in DebugStr, we cause MacsBug to execute the “g” or “go” command which resumes execution of the suspended application. Since we are going to append this to almost every call to DebugStr (the exceptions being when '\0' or EOT are streamed), we never let the Pascal string in the buffer to grow into the last two bytes of the buffer.

The softflush routine is called when the user streams doutsoftflush (‘\r'). We check to see if there are any characters in the buffer. If there are, we call flushdebugstring, and if there aren’t, we call flushalerts. Since flushdebugstring calls flushalerts, alerts are always flushed.

flushalerts calls SysBeep the number of times specified in alertCount and resets alertCount to zero.

The routine that actually calls DebugStr is flushdebugstring, which is called when the user streams '\n', '\0', or EOT. flushdebugstring takes a single parameter which is used to determine whether or not to append “;g” to the buffer before passing it to DebugStr. After appending the “;g” or not, we flush alerts with a call to flushalerts, call DebugStr, and then zero out the string in the buffer.

Bibliography and References

Information on using the standard C++ iostreams library is readily available. Any recently published work on ANSI C++ would include information on library usage. Implementation is a somewhat different matter. The dout Library would probably not have been possible without:

Plauger, P.J. The Draft Standard C++ Library. Prentice Hall, 1995.

For information on MacsBug:

Apple Computer. MacsBug Reference and Debugging Guide. Addison Wesley, 1990.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

How to be a star in Britney Spears: Amer...
If you've ever wanted to be a star, baby, then you've probably already checked out Britney Spears: American Dream and are happily making your way up the charts. But fame doesn't come easy, and everyone needs a helping hand sometimes. So we've got... | Read more »
AppSpy is hiring a part time Staff Write...
| Read more »
How to save lives in ER Surgery Simulato...
A serious earthquake has struck a nearby town in ER Surgery Simulator - Emergency Doctor, and it’s up to you to save the victims. [Read more] | Read more »
Tips and tricks to get a high score in G...
Ketchapp Games loves the endless runner genre. And its newest game, Gravity Switch, is no exception. Gravity Switch takes a fresh approach, though, as you move a block, suspended in zero gravity, safely through a maze of shifting pillars. If the... | Read more »
Tips and tricks to get a high score in S...
Smash Fu is a high-paced tile-tapping game that requires quick reflexes and some practice. You’ll have to smash bricks with the skill of a seasoned black belt to get a high score. To raise the stakes a bit, you’ll also have to avoid tapping any... | Read more »
How to keep the ball rolling in Dropple
If you're new to the minimalist puzzler Dropple, you may find yourself struggling to make it beyond the first couple of steps before your ball falls into the endless abyss below. [Read more] | Read more »
How not to die in Traffic Rider
Traffic Rider, an Out Run-esque game in which your ride a motorcycle recklessly into trffic, might not seem particularly complicated. [Read more] | Read more »
How to adjust your chess game for Regici...
At first glance you might likenWarhammer 40,000: Regicide to Chess - and you'd be right. Regicideputs its own spin on the classic board game though, so some of your tried and true methods may not work quite so well here. [Read more] | Read more »
Rush Rally 2 (Games)
Rush Rally 2 1.0 Device: iOS Universal Category: Games Price: $3.99, Version: 1.0 (iTunes) Description: -- Rush Rally 2 is the most authentic and thrilling rally simulation on your mobile, all running at an astounding 60fps. Console... | Read more »
Warhammer 40000: Regicide (Games)
Warhammer 40000: Regicide 1.0 Device: iOS Universal Category: Games Price: $3.99, Version: 1.0 (iTunes) Description: ++NOTE: Optimized for with iPad Air, iPad mini 2, iPhone 5 and up. ++ "“This game has no right to be as good as it... | Read more »

Price Scanner via MacPrices.net

Textkraft Professional Becomes A Mobile Produ...
The new update 4.1 of Textkraft Professional for the iPad comes with many new and updated features that will be particularly of interest to self-publishers of e-books. Highlights include import and... Read more
SnipNotes 2.0 – Intelligent note-taking for i...
Indie software developer Felix Lisczyk has announced the release and immediate availability of SnipNotes 2.0, the next major version of his productivity app for iOS devices and Apple Watch.... Read more
Pitch Clock – The Entrepreneur’s Wingman Laun...
Grand Rapids, Michigan based Skunk Tank has announced the release and immediate availability of Pitch Clock – The Entrepreneur’s Wingman 1.1, the company’s new business app available exclusively on... Read more
13-inch 2.9GHz Retina MacBook Pro on sale for...
B&H Photo has the 13″ 2.9GHz Retina MacBook Pro (model #MF841LL/A) on sale for $1599 including free shipping plus NY tax only. Their price is $200 off MSRP. Amazon also has the 13″ 3.9GHz Retina... Read more
Apple price trackers, updated continuously
Scan our Apple Price Trackers for the latest information on sales, bundles, and availability on systems from Apple’s authorized internet/catalog resellers. We update the trackers continuously: - 15″... Read more
Clearance 12-inch Retina MacBooks available s...
B&H Photo has dropped prices on leftover 2015 12″ Retina MacBooks with models now available starting at $999. Shipping is free, and B&H charges NY tax only: - 12″ 1.1GHz Gray Retina MacBook... Read more
Check Apple prices on any device with the iTr...
MacPrices is proud to offer readers a free iOS app (iPhones, iPads, & iPod touch) and Android app (Google Play and Amazon App Store) called iTracx, which allows you to glance at today’s lowest... Read more
New 2016 13-inch 256GB MacBook Air on sale fo...
B&H Photo has the new 13″ 1.6GHz/256GB MacBook Air (model MMGG2LL/A) on sale for $1149 including free shipping plus NY sales tax only. Their price is $50 off MSRP. Amazon has the 13″ 1.6GHz/256GB... Read more
Apple refurbished iPad Air 2s available start...
Apple has Certified Refurbished iPad Air 2 available starting at $339. Apple’s one-year warranty is included with each model, and shipping is free: - 128GB Wi-Fi iPad Air 2: $499 - 64GB Wi-Fi iPad... Read more
Accenture and Vatican Opera Romana Pellegrina...
Accenture has announced that the official mobile application for the Extraordinary Jubilee Year of Mercy declared by Pope Francis has been built and launched by Accenture Mobility, part of Accenture... Read more

Jobs Board

ISCS *Apple* ID Site Support Engineer - APP...
…position, we are looking for an individual who has experience supporting customers with Apple ID issues and enjoys this area of support. This person should be Read more
Automotive Sales Consultant - Apple Ford Linc...
…you. The best candidates are smart, technologically savvy and are customer focused. Apple Ford Lincoln Apple Valley is different, because: $30,000 annual salary Read more
*Apple* Support Technician II - Worldventure...
…global, fast growing member based travel company, is currently sourcing for an Apple Support Technician II to be based in our Plano headquarters. WorldVentures is Read more
Restaurant Manager (Neighborhood Captain) - A...
…in every aspect of daily operation. WHY YOU'LL LIKE IT: You'll be the Big Apple . You'll solve problems. You'll get to show your ability to handle the stress and Read more
Editor, *Apple* News - APPLE (United States...
Job Summary The Apple News team is looking for a passionate...a news organization. Description * Program Top Stories in Apple News * Post on Apple News Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.