/* ojo v2 */

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

#define BUFSIZE 12
//#define XDEBUG

static unsigned char buf[BUFSIZE + 1];
static int inbuf;
static unsigned char * bp;
static unsigned char * be;
static int doread = 1;

int readint(int fd, int * num)
{
	int rv;
	int gotdigit;
	int ret = 0;
	unsigned char * bb;

	while (1) {
		if (doread) {
			rv = read(fd, buf + inbuf, BUFSIZE - inbuf);
			if (rv <= 0) {
#ifdef XDEBUG
				printf("not loaded a thing\n");
#endif
				return ret; /* eof albo inny zonk */
			}
#ifdef XDEBUG
			printf("loaded %d @ %d\n", rv, inbuf);
#endif
			doread = 0;
			inbuf += rv;
			bp = buf;
			be = buf + inbuf;
			*be = '\0';
		}
		bb = bp;
		ret = sscanf(bp, "%d", num);
#ifdef XDEBUG
		printf("sscanf @ %ld: %d (bp[0]: 0x%02x, bp[1]: 0x%02x)\n", bp - buf, rv, bp[0], bp[1]);
#endif
		if (ret == -1) {
			ret = 0;
			doread = 1;
			inbuf = 0;
			continue;
		}
		if (!ret) {
			break;
		}
		gotdigit = 0;
		while (bp < be) {
			bp++;
			if (!gotdigit) {
				/* ignoruj wszystkie non-digity póki znajdziesz digit */
				if (isdigit(*bp) || *bp == '-') {
					gotdigit = 1;
					bb = bp; /* xx */
				}
			} else {
				if (!isdigit(*bp))
					break;
			}
		}
		if (bp == be) {
			/* cos tam bylo, wiec sprobuj przesunac buf */
			memmove(buf, bb, be - bb);
			inbuf = be - bb;
			doread = 1;
#ifdef XDEBUG
			printf("shifted, in buf: %d\n", inbuf);
#endif
		} else {
			break;
		}
		
	}
	return ret;
}

int main(int ac, char ** av)
{
	int x;
	
	while (readint(0, &x)) {
		printf("found: %d\n", x);
	}
	return 0;
}