benwills

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

//
//  Create entries for a boolean lookup table.
//
// Example output from list[], below:
// 	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
// 	0,1,0,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,
// 	1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,

benwills

#include <time.h>
#include <stdint.h>
#include <sys/types.h>
#include <stdio.h>
#include <ctype.h>

/*
	Character-by-character comparisons for equality and lowercasing.
		Custom functions vs tolower.
		Spoiler: lookup table is the fastest.

benwills

int i;
float tStart, tDiff;
uint32_t runs = 1000;

tStart = (float)clock()/CLOCKS_PER_SEC;
for ( i=0; i<runs; ++i ) {
	func();
}
tDiff = (float)clock()/CLOCKS_PER_SEC - tStart;

benwills

//https://github.com/bitly/dablooms/blob/master/src/test_dablooms.c

static void chomp_line(char *word)
{
    char *p;
    if ((p = strchr(word, '\r'))) {
        *p = '\0';
    }
    if ((p = strchr(word, '\n'))) {
        *p = '\0';

benwills

unsigned short timestamp = <some value>; // Bits: DDDDDHHHHHMMMMMM

int day = (timestamp >> 11) & 0x1F;
int hour = (timestamp >> 6) & 0x1F;
int min = (timestamp) & 0x3F;

unsigned short dup_timestamp = (short)((day << 11) | (hour << 6) | min);


// Alternative using macros

benwills

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <errno.h>

int main(int argc, char *argv[])

benwills

#include <stdio.h>
#include <unistd.h> //lseek, write, close
#include <stdlib.h> //exit
#include <fcntl.h>  //open
#include <sys/mman.h>

#define Mapmalloc(number, type, filename, fd) load_mmap(filename, &(fd), (number)*sizeof(type), 'y')
#define Mapload(number, type, filename, fd) load_mmap(filename, &(fd), (number)*sizeof(type), 'n')
#define Mapfree(number, type, fd, pointer) releasemmap(pointer, (number)*sizeof(type), fd)
#define Stopifnot(assertion, ...) if (!(assertion)){printf(__VA_ARGS__); exit(1);}

benwills

/*
 * $Id: simple-tcp-proxy.c,v 1.6 2002/11/27 00:40:31 wessels Exp $
 */
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <netdb.h>
#include <string.h>
#include <signal.h>

benwills

/* Copyright (c) 2001 Matej Pfajfar.
 * Copyright (c) 2001-2004, Roger Dingledine.
 * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
 * Copyright (c) 2007-2013, The Tor Project, Inc. */
/* See LICENSE for licensing information */

/**
 * \file connection.c
 * \brief General high-level functions to handle reading and writing
 * on connections.

benwills

// $Id: simple-proxy.c,v 1.4 2005/02/25 04:23:24 dean Exp $

//
// simple-proxy.c: simple tcp proxy for async bi-directional data transfer
//
// usage: simple-proxy host port
//
// this will open a socket to host:port and copy data from stdin to the socket,
// and from the socket to stdout.  errors may appear on stderr.
//