TweetFollow Us on Twitter

Jun 99 Tips

Volume Number: 15 (1999)
Issue Number: 6
Column Tag: Tips & Tidbits

Jun 99 Tips

by Jeff Clites, online@mactech.com

Conversion from Intel Byte Order

Intel microprocessors store integer data in a different way than the PowerPC does. The PowerPC (operating under the Mac OS) stores the bytes in big endian order, from the most significant to the least significant, while the Intel processor uses the opposite byte order (little endian).

When you are using a Macintosh but have to read a file created on a computer with an Intel processor, or when you have to write a file for later use on an Intel machine, this difference is something you have to worry about. You can use the following routines to convert shorts and longs back and forth between the two byte orders.

#define MotorolaToIntelLong IntelToMotorolaLong
#define MotorolaToIntelShort IntelToMotorolaShort
/* Prototypes */
unsigned long IntelToMotorolaLong (unsigned long original);
unsigned short IntelToMotorolaShort 
							(unsigned short original);
/* Intel to Motorola bytes order */
/* Little endian to big endian   */
unsigned long IntelToMotorolaLong (unsigned long original)
{
	unsigned long converted;
	char *b;
	converted = 0L;
	if (original == 0) return converted;
	b = (char*)&converted;
	*b++ = (char)(original);
	*b++ = (char)(original >> 8);
	*b++ = (char)(original >> 16);
	*b++ = (char)(original >> 24);
	return converted;
}

/* Intel to Motorola bytes order */
/* Little endian to big endian   */
unsigned short IntelToMotorolaShort 
							(unsigned short original)
{
	unsigned short converted;
	char *b;
	converted = 0;
	if (original == 0) return converted;
	b = (char *)&converted;
	*b++ = (char)(original);
	*b++ = (char)(original >> 8);
	return converted;
}

Marco Bambini
marco@spiderlink.it

C++ File Streams and FSSpecs

When using ANSI C and C++ file routines, Macintosh programmers run into the unfortunate snag that these routines assume that files are properly identified by path names, but under the Mac OS they are specified through an FSSpec data structure. Of course, it is possible to obtain the full path to a file given its FSSpec, but this isn't really a solution, because on the Macintosh full path names don't uniquely identify files (for instance, if the user has more than one mounted disk with the same name).

Fortunately, Metrowerks has provided FSp_fopen, which works like C's fopen except that it uses FSSpecs instead of paths. To similarly obtain a C++ file stream you have to do a little more work, but the following example from Metrowerks' MWRon <MWRon@metrowerks.com> demonstrates how to do it with minimal fuss.

#include <iostream>
#include <fstream>
#include <SIOUX.h>
#include <unistd.h>
#include <cstring>
using namespace std;
int GetStream(FSSpec &fs, ifstream &in);
void Initialize(void);
const int PSIZE = 256;
char AppPathName[PSIZE];
char FilePathName[PSIZE];
int main()
{
	// initialize your managers
	Initialize();
	SIOUXSettings.initializeTB = FALSE;
	ifstream in;  // input file
	strcpy(AppPathName , "");		// safety
	strcpy(FilePathName , "");	// safety
	const short kNilFilterProc = nil;	// use dialog to open file
	StandardFileReply  reply;
	short numTypes = 0;
	SFTypeList typeList;
	FSSpec fs;
 	StandardGetFile( kNilFilterProc, numTypes, typeList, &reply);
	fs = reply.sfFile;
 	if(GetStream(fs, in)) exit(1); // stream failed to open
 	strcat(FilePathName, p2cstr(fs.name) );
 	c2pstr((char *)fs.name); 
	// see where we are at now
	cout << "The folder holding the executable is \n" 
 		<< getcwd(AppPathName, PSIZE) << endl;
 	cout << "The opened file's full name is \n" 
 		<< FilePathName << endl;
  	
	return 0;
}
 
int GetStream(FSSpec &fs, ifstream &in)
{
	short savedVol;
	OSErr err = 0;

	// get volume of application
	if ( (err = GetVol(0, &savedVol)) != NULL)
		return err;

	// set working volume	
	if ((err = HSetVol(0, fs.vRefNum, fs.parID)) != NULL)
		return err;
	
	// open file 
	in.open(p2cstr(fs.name));
	if(!in) { err = 1; return err;}
	c2pstr((char *)fs.name);
	getcwd(FilePathName, PSIZE);   // get working directory	
	// reset volume of application
	if( (err = SetVol(0, savedVol)) != NULL)
		return err;
	
	return err;
}

void Initialize(void)
{
	/* Initialize all the needed managers. */
	InitGraf(&qd.thePort);
	InitFonts();
	InitWindows();
	InitMenus();
	TEInit();
	InitDialogs(nil);
	InitCursor();
}
 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Posterino 3.3.5 - Create posters, collag...
Posterino offers enhanced customization and flexibility including a variety of new, stylish templates featuring grids of identical or odd-sized image boxes. You can customize the size and shape of... Read more
Kodi 17.1. - Powerful media center tool...
Kodi (was XBMC) is an award-winning free and open-source (GPL) software media player and entertainment hub that can be installed on Linux, OS X, Windows, iOS, and Android, featuring a 10-foot user... Read more
Kodi 17.1. - Powerful media center tool...
Kodi (was XBMC) is an award-winning free and open-source (GPL) software media player and entertainment hub that can be installed on Linux, OS X, Windows, iOS, and Android, featuring a 10-foot user... Read more
Bookends 12.8 - Reference management and...
Bookends is a full-featured bibliography/reference and information-management system for students and professionals. Bookends uses the cloud to sync reference libraries on all the Macs you use.... Read more
Apple iTunes 12.6 - Play Apple Music and...
Apple iTunes lets you organize and stream Apple Music, download and watch video and listen to Podcasts. It can automatically download new music, app, and book purchases across all your devices and... Read more
Default Folder X 5.1.4 - Enhances Open a...
Default Folder X attaches a toolbar to the right side of the Open and Save dialogs in any OS X-native application. The toolbar gives you fast access to various folders and commands. You just click on... Read more
Amazon Chime 4.1.5587 - Amazon-based com...
Amazon Chime is a communications service that transforms online meetings with a secure, easy-to-use application that you can trust. Amazon Chime works seamlessly across your devices so that you can... Read more
CrossOver 16.2 - Run Windows apps on you...
CrossOver can get your Windows productivity applications and PC games up and running on your Mac quickly and easily. CrossOver runs the Windows software that you need on Mac at home, in the office,... Read more
Adobe Creative Cloud 4.0.0.185 - Access...
Adobe Creative Cloud costs $19.99/month for a single app, or $49.99/month for the entire suite. Introducing Adobe Creative Cloud desktop applications, including Adobe Photoshop CC and Illustrator CC... Read more
MegaSeg 6.0.2 - Professional DJ and radi...
MegaSeg is a complete solution for pro audio/video DJ mixing, radio automation, and music scheduling with rock-solid performance and an easy-to-use design. Mix with visual waveforms and Magic... Read more

The best deals on the App Store this wee...
Deals, deals, deals. We're all about a good bargain here on 148Apps, and luckily this was another fine week in App Store discounts. There's a big board game sale happening right now, and a few fine indies are still discounted through the weekend.... | Read more »
The best new games we played this week
It's been quite the week, but now that all of that business is out of the way, it's time to hunker down with some of the excellent games that were released over the past few days. There's a fair few to help you relax in your down time or if you're... | Read more »
Orphan Black: The Game (Games)
Orphan Black: The Game 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Dive into a dark and twisted puzzle-adventure that retells the pivotal events of Orphan Black. | Read more »
The Elder Scrolls: Legends is now availa...
| Read more »
Ticket to Earth beginner's guide: H...
Robot Circus launched Ticket to Earth as part of the App Store's indie games event last week. If you're not quite digging the space operatics Mass Effect: Andromeda is serving up, you'll be pleased to know that there's a surprising alternative on... | Read more »
Leap to victory in Nexx Studios new plat...
You’re always a hop, skip, and a jump away from a fiery death in Temple Jump, a new platformer-cum-endless runner from Nexx Studio. It’s out now on both iOS and Android if you’re an adventurer seeking treasure in a crumbling, pixel-laden temple. | Read more »
Failbetter Games details changes coming...
Sunless Sea, Failbetter Games' dark and gloomy sea explorer, sets sail for the iPad tomorrow. Ahead of the game's launch, Failbetter took to Twitter to discuss what will be different in the mobile version of the game. Many of the changes make... | Read more »
Splish, splash! The Pokémon GO Water Fes...
Niantic is back with a new festival for dedicated Pokémon GO collectors. The Water Festival officially kicks off today at 1 P.M. PDT and runs through March 29. Magikarp, Squirtle, Totodile, and their assorted evolved forms will be appearing at... | Read more »
Death Road to Canada (Games)
Death Road to Canada 1.0 Device: iOS Universal Category: Games Price: $7.99, Version: 1.0 (iTunes) Description: Get it now at the low launch price! Price will go up a dollar every major update. Update news at the bottom of this... | Read more »
Bean's Quest Beginner's Guide:...
Bean's Quest is a new take on both the classic platformer and the endless runner, and it's free on the App Store for the time being. Instead of running constantly, you can't stop jumping. That adds a surprising new level of challenge to the game... | Read more »

Price Scanner via MacPrices.net

Updated iPad Price Trackers
Scan our Apple iPad (and iPod touch) Price Trackers for the latest information on sales, bundles, and availability on systems from Apple’s authorized internet/catalog resellers. We update the... Read more
12-inch 32GB Space Gray iPad Pro on sale for...
B&H Photo has 12″ Space Gray 32GB WiFi Apple iPad Pros on sale for $50 off MSRP including free shipping. B&H charges sales tax in NY only: - 12″ Space Gray 32GB WiFi iPad Pro: $749 $50 off... Read more
2.6GHz Mac mini on sale for $559, $140 off MS...
Guitar Center has the 2.6GHz Mac mini (MGEN2LL/A) on sale for $559 including free shipping. Their price is $140 off MSRP, and it’s the lowest price available for this model. Read more
SSD Speeder RAM Disk SSD Life Extender App Fo...
Fehraltorf, Switzerland based B-Eng has announced they are making their SSD Speeder app for macOS publicly available for purchase on their website. SSD Speeder is a RAM disk utility that prevents... Read more
iPhone Scores Highest Overall in Smartphone D...
Customer satisfaction is much higher among smartphone owners who use their device to operate other connected home services such as smart thermostats and smart appliances, according to the J.D. Power... Read more
Swipe CRM Free Photo-Centric CRM Sales DEal C...
Swipe CRM LLC has introduced Swipe CRM: Visual Sales 1.0 for iPad, an app for creating, managing, and sharing visually stunning sales deals. Swipe CRM is targeted to small-and-medium creative... Read more
13-inch 2.0GHz Apple MacBook Pros on sale for...
B&H has the non-Touch Bar 13″ 2.0GHz MacBook Pros in stock today and on sale for $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.0GHz MacBook Pro Space Gray (... Read more
15-inch Touch Bar MacBook Pros on sale for up...
B&H Photo has the new 2016 15″ Apple Touch Bar MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.7GHz Touch Bar... Read more
Apple’s iPhone 6s Tops Best-Selling Smartphon...
In terms of shipments, the iPhone 6s from Apple bested all competitors for sales in 2016, according to new analysis from IHS Markit, a world leader in critical information, analytics and solutions.... Read more
Logitech Rugged Combo Protective iPad Case an...
Logitech has announced its Logitech Rugged Combo, Logitech Rugged Case, and Logitech Add-on Keyboard for Rugged Case for Apple’s new, more affordable $329 9.7-inch iPad, a complete solution designed... Read more

Jobs Board

*Apple* Mobile Master - Best Buy (United Sta...
**492889BR** **Job Title:** Apple Mobile Master **Location Number:** 000886-Norwalk-Store **Job Description:** **What does a Best Buy Apple Mobile Master do?** Read more
*Apple* Mobile Master - Best Buy (United Sta...
**492472BR** **Job Title:** Apple Mobile Master **Location Number:** 000470-Seattle-Store **Job Description:** **What does a Best Buy Apple Mobile Master do?** Read more
*Apple* Mobile Master - Best Buy (United Sta...
**492562BR** **Job Title:** Apple Mobile Master **Location Number:** 000853-Jackson-Store **Job Description:** **What does a Best Buy Apple Mobile Master do?** Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Fulltime aan de slag als shopmanager in een h...
Ben jij helemaal gek van Apple -producten en vind je het helemaal super om fulltime shopmanager te zijn in een jonge en hippe elektronicazaak? Wil jij werken in Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.