2of1

half a nibble of another

Here’s some code for a simple C hashtable.
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Here are the slides and code examples of the talk that I gave at the 7th DC9723 meet a few weeks ago.

To all those that came; thanks – I hope you found it interesting!

Here are two easy ways to compile 32-bit binaries on a 64-bit system.
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Peter van der Linden brought up a point regarding strcmp() his book Expert C Programming: Deep C Secrets that I found interesting.
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UPDATE: See comments

Linux purists are going to go crazy at this, but I was looking for a way to write to the kernel ring buffer (read by dmesg) from a userspace script.
I’m not going to debate the ‘whys’ – but in short I like having my sys logs for automated system actions (some which are userspace-launched) in one neat place.
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There’s a quick and effective way of producing a random value in C if you only require it at most once per second using current time as a random seed:

#include <time.h>     // time_t, time()
#include <stdlib.h>   // srand(), rand()
 
time_t s;
time(&s);
srand((unsigned int)s);
 
// calc random value (limits are inclusive)
int rand_val = 1 + (int)((float)UPPER_LIMIT * 
               (rand() / (RAND_MAX + (float)LOWER_LIMIT)));

Of course reading from /dev/urandom is good too (on linux).

I wrote some Direct2D compatibility headers to allow for cross-compilation using MingW or mingw-w64.
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A while back I wrote a tool to build Direct2D api headers off the public information on MSDN.

Yesterday I noticed that my vlc patch – while compiling fine – crashes on a certain D2D API call.

The reason for this it seems that my generation tool pulls off the API from MSDN in the order that it appears there – i.e. alphabetical order.
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When connect()ing to a server, there is no direct way to define a timeout for that connection attempt – meaning that you could be waiting for a LONG time.

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