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Image Magick: 32bit MacOSX installation

Mac OS X-specific Build instructions

Perform these steps as an administrator or with the sudo command:

* Install Fink. The default setup creates a /sw folder on your main hard
* drive. Make sure /sw/bin is in your path.
* Install the latest Xcode from Apple.
* Create a symbolic link in /Developer/SDKs/MacOSX10.4u.sdk/ to /sw:

cd /Developer/SDKs/MacOSX10.4u.sdk
ln -s sw /sw

* Use Fink, or FinkCommander to install any delegate libraries you
* require, for example:

fink install libjpeg

As a regular user or administrator:

* Download the ImageMagick source distribution.
* Unpack and change into the top-level ImageMagick directory:

tar xvfz ImageMagick-6.3.3-0.tar.gz
cd ImageMagick-6.3.3

* Choose an architecture and set your CFLAGS environment variable. Here we
* set CFLAGS for an Intel build:

export CFLAGS="-O -g -isysroot /Developer/SDKs/MacOSX10.4u.sdk/ -arch i386 -I/sw/include/"

* Set your LDFLAGS environment variable to:

export
LDFLAGS="-Wl,-syslibroot,/Developer/SDKs/MacOSX10.4u.sdk/,-L/sw/lib/"

* Configure ImageMagick:

./configure --prefix=/sw --with-quantum-depth=16 \
--disable-dependency-tracking --with-x=yes \
--x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib \
--without-perl

* Build ImageMagick:

make

* Install ImageMagick:

sudo make install

* To test the ImageMagick GUI, start X11 and in a new shell and type:

display -display :0

Running shell command from Java program

Following program runs the shell copy command "cp" from a java program:

import java.util.regex.*;
import java.io.*;


class ExecDemo {
public static void main(String args[]) {
Runtime r = Runtime.getRuntime();
Process p = null;
try {
File fin = new File("sampleNames.txt");
FileInputStream fis = new FileInputStream(fin);
BufferedReader in = new BufferedReader(new InputStreamReader(fis));
String aLine = = null;
String destinationPath = "output/" + "ls_log_untruncated_reshape" + "/";
System.out.println(destinationPath);
while((aLine = in.readLine()) != null) {
String filePath = "input/" +aLine + "/"+ aLine + "_"+"ls_log_untruncated_reshape.txt";
System.out.println(aLine);
String command = "cp " + filePath + " " + destinationPath;
System.out.println(command);
p = r.exec(command);
}

}catch (FileNotFoundException e) {
System.out.println("Cannot find the input file.");
}
catch (Exception e) {
System.out.println("Error running the command.");
}
}
}


References :
Reference 1
Reference 2

Java 1.6 for Mac OSX

Java 1.6 is not installed as default. You can download it from the
Apple Developer Connection (ADC) from the download section(if you are a member of ADC).

when you type java at the command line, it invokes /usr/bin/java which is really a link to the Java Framework.

Java Link

cmar$ ls -la /usr/bin/java
lrwxr-xr-x 1 root wheel 74 Apr 30 08:41 /usr/bin/java -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java

Switching you default

If you want to switch your default then you need to either modify the link /usr/java/bin
sudo ln -s /System/Library/Frameworks/JavaVM.framework/Versions/1.6/Commands/java /usr/bin/java
You might have to do "rm /usr/java/bin" first to remove the link before creating a new one.

Or you can just create an alias in your ~/.bash_login
alias java=/System/Library/Frameworks/JavaVM.framework/Versions/1.6/Commands/java

Reference

Algorithms

Sorting Algorithms
Huffman Encoding
Matrix inverse

Parsing a comma separated string in C++

int split(const string& s, char c, vector& v) {

string::size_type i = 0;
string::size_type j = s.find(c);

while (j != string::npos) {

v.push_back(s.substr(i, j-i));
i = ++j;
j = s.find(c, j);

if (j == string::npos)
v.push_back(s.substr(i, s.length( )));

}

return v.size();
}

reference

COMPUTER GRAPHICS: Algorithms

1. Line Drawing Algorithms