c Kernighan & Ritchie exercise

Lately im into c programming, really newbie, so im reading Kernighan & Ritchie famous book.
Here a funny exercise that reverse an input line string:

"Write a function reverse(s) that reverses the character string s. Use it to write a program that reverses its input a line at a time."

i change the params as you can see..


#include <stdio.h>

#define MAXLEN 30

int getline(char s[], int lim);
void reverse(char s[], char r[], int len);

int main()
{
int len;
char line[MAXLEN];
char reversed[MAXLEN];

len = 0;

while((len = getline(line, MAXLEN)) > 0)
{
reverse(line, reversed, len);
printf("\nReversed = %s\n\n", reversed);
}

return 0;
}

int getline(char s[],int lim)
{
int c, i;
for (i=0; i < lim-1 && (c=getchar())!=EOF && c!='\n'; ++i)
s[i] = c;
if (c == '\n') {
s[i] = c;
++i;
}
s[i] = '\0';
return i;
}

void reverse(char s[], char r[], int len)
{
int i;

for(i = 0; i < len; i++)
r[i] = 0;

for(i = 0; i < len; i++)
{
/* -2 will strip \n in the original string (-1 the original end of string */
r[i] = s[len-i-2];
}
r[len] = '\0';
}


Devkitpro 1.5.0, PAlib and Visual c++ 2008 Express

Few days ago i started to think about devkitpro, to develop nintendo DS homebrew software. So i start to chill around PAlib. Just to check out. So i move to the wiki to installing the toolchain.
I soon discover that it was possible to use PAlib with Visual c++ 2008 Express.
I notice that the step to follow was outdated.

If you want to get it work just follow that steps but with this difference:

1. Set PAPATH enviorment variable to this one: <path to devkitpro>/PAlib/lib


2. After the launch of the PAlib application wizard, change the makefile inside <path to PAlib application wizard>/Files/Templates/1033 with one you can find in the PAlib examples


3. If you want to keep logos inside the data folder change the icon path in the make file from ICON := -b $(CURDIR)/../logo.bmp to ICON := -b $(CURDIR)/../data/logo.bmp

that's all, this work fine, hope someone could find this useful.

PHP directory listing : convert a folder tree into an array

Hi there!

in a post few months ago i talked about Directory listing in php, there i show a pair of function to list a directory and turn it into an array.

Well today i come back to that function and change it a little to get it better.

It's quite simple, it start from a path (btw thinking correct) and push it into a structured array. In wich every array element mean a subdirectory, and a null value mean a file.

You can choose the recursive mode in which, when a subfolder is found goes deep into it (recursively too) to fill the array with file and subfolder of that directory.

It's simple, it just check the params $recurrent for true and that the "entry" scaned by read method from metaclass dir is a directory.

Hope someone could find it useful.

function array_converter($path, $recurrent = false, $tree = array())
{
 $path = realpath($path);
 $d = dir($path);
 while(false != ($entry = $d->read()))
 {
  $complete = $d->path."/".$entry;
  if(is_dir($complete) && $entry !== '.' && $entry !== '..')
  {
   $tree[$entry] = array();
   if($recurrent && $entry !== '.' && $entry !== '..')
   {
    $tree[$entry] = array_converter($complete, $recurrent, $tree[$path][$entry]);
   }
  } elseif($entry !== '.' && $entry !== '..') {
   $tree[$entry] = null;
  }
 }
 $d->close();
 return $tree;
}