deepcube’s gists

deepcube / connect_die.c

Last active December 16, 2015 09:59

Test whether ZMQ_ROUTER sockets grow as peers connect and disconnect. It looks like they don't. To run, download all three files into the same directory and run: sh disconnect_test.sh

	#include <errno.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <zmq.h>

	#define zcheck_err(eval, condition, fmt, args...) \
	((void)({ \
	errno = 0; \
	if (!(condition)) { \

deepcube / many.c

Last active December 16, 2015 10:49

Continually create and destroy contexts and sockets to check for memory leaks. None found. To run download both files into a directory and run: sh many_test.sh

	#include <czmq.h>
	#include <errno.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <zmq.h>

	#define zcheck_err(eval, condition, fmt, args...) \
	((void)({ \
	errno = 0; \
	if (!(condition)) { \

deepcube / czmq_connect_die.c

Created April 19, 2013 20:32

Rewrite of https://gist.github.com/deepcube/5417288 in czmq. To run download all files in a directory and run: sh czmq_disconnect_test.sh

	#include <czmq.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <zmq.h>

	#define zcheck_err(eval, condition, fmt, args...) \
	((void)({ \
	errno = 0; \
	if (!(condition)) { \
	fprintf(stderr, "%s: " fmt "%s%s\n", prog_name, ##args, errno ? ": " : "", errno ? zmq_strerror(errno) : ""); \

deepcube / offsets.awk

Last active December 17, 2015 09:09

Given a file, print each word followed by byte offsets at which it is found. offsets.c and offsets.bash should be interchangeable. ./offsets < file | awk -f offsets.awk | sort | column -t

	# offsets.awk
	#
	# given a list of word offset pairs, accumulate offsets and print
	# word [offset,...] pairs
	# use with offsets.c
	# no good way to shebang awk, so just do awk -f manually

	{
	a[$1] = a[$1] (a[$1] ? "," : "") $2;
	}

deepcube / zerr.h

Created May 24, 2013 16:43

zeromq macros I use, see comments for descriptions. gcc specific due to branching macros. _GNU_SOURCE specific due to program_invocation_name.

	#ifndef ZERR_H
	#define ZERR_H

	#ifndef _GNU_SOURCE
	#define _GNU_SOURCE // for program_invocation_name
	#endif

	#include <errno.h>
	#include <stdio.h>
	#include <stdlib.h>

deepcube / broker.c

Created May 24, 2013 16:49

zeromq broker. Frontend client prepends messages with the ID of the final destination. Broker receives message through a ZMQ_ROUTER so message now has initial source ID prepended. Broker swaps first two frames and sends message out backend ZMQ_ROUTER, which routes message to final destination. Clients used as destinations must identify to broker…

	#include <czmq.h>
	#include <stdlib.h>
	#include <zmq.h>

	#include "zerr.h"

	/*
	* read message, switch first two frames (from and to), send it back out
	* arg is the socket to which the message should be sent. For the front_end arg
	* is back_end, and vice versa.

deepcube / simevent

Created February 27, 2015 22:42

	#!/bin/sh
	#
	# Simulate add/remove events by writing directly
	# into the uevent files.

	if [ "$#" -ne 1 ] \|\| [ "$1" != add ] && [ "$1" != remove ]; then
	# warning: can't trust $0, better off just hard coding the name
	# echo "usage: simevent add\|remove" 1>&2
	printf "usage: %s add\|remove\n" "${0##*/}" 1>&2
	exit 1

deepcube / add_chain_0.c

Last active August 29, 2015 14:16

	#include <stdio.h>
	#include <stdlib.h>
	#include <stdint.h>
	#include <inttypes.h>

	uintmax_t calls;

	void print(int *chain, int len)
	{
	for (int i = 0; i < len; i++)

deepcube / cycle.c

Created March 12, 2015 00:04

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	typedef struct Node Node;
	struct Node {
	Node next; / next Node in the chain */
	Node first; / Node we started the chain on */
	int pos; /* position in chain */
	};

deepcube / rev.c

Created April 9, 2015 15:59

	#include <errno.h>
	#include <fcntl.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <sys/stat.h>
	#include <unistd.h>
	#define x(s,d,...)if(s){o=errno;fputs(*v,stderr);fprintf(stderr,": "__VA_ARGS__\
	);errno=o;perror(0);d;}
	#define l while

Evan Gates deepcube