/*
 * doit.c: Quick hack to play a sequence of GIF files.
 * 
 * Rob McCool
 *
 * This code is released into the public domain.  Do whatever 
 * you want with it.
 *
 */

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

#define HEADER \
"Content-type: multipart/x-mixed-replace;boundary=ThisRandomString\n" \

#define RANDOMSTRING "\n--ThisRandomString\n"
#define ENDSTRING "\n--ThisRandomString--\n"
#define CTSTRING "Content-type: image/gif\n\n"

int main(int argc, char *argv[])
{
    struct stat fi;
    char fn[50];
    caddr_t fp;
    int fd; 
    int i,j;

    if (write(STDOUT_FILENO, HEADER, strlen(HEADER)) == -1)
    {
        exit(0);
    }
    if (write(STDOUT_FILENO, RANDOMSTRING, strlen(RANDOMSTRING)) == -1)
    {
        exit(0);
    }

    sleep(1);
    for (j=0; j <4; j++)
    for ( i = 1; i < 8; i++ )
    {
        if (write(STDOUT_FILENO, CTSTRING, strlen(CTSTRING)) == -1)
	{
            exit(0);
	}
	sprintf(fn, "/gifs/run%d.gif", i);
        if( (fd = open(fn, O_RDONLY)) == -1)
	{
            continue;
	}
        fstat(fd, &fi);
        fp = mmap(NULL, fi.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
        if (fp == (caddr_t) -1)
	{
            exit(0);
	}
        if (write(STDOUT_FILENO, (void *) fp, fi.st_size) == -1)
	{
            exit(0);
	}
        munmap(fp, fi.st_size);
        close(fd);
        if (write(STDOUT_FILENO, RANDOMSTRING, strlen(RANDOMSTRING)) == -1)
	{
            exit(0);
	}
    }
    write(STDOUT_FILENO, ENDSTRING, strlen(ENDSTRING));
}