/*	USER SIDE PRINTF  * Copyright Finite State Machine Labs Inc. March 2001. * by Victor Yodaiken * * All rights reserved. You are not permitted to remove * or modify this copyright notice and you may not  * modify or distribute this * code without explicit authorization from Finite State Machine Labs Inc. * * */#include <stdio.h>#include <unistd.h>#include <fcntl.h>#define BUFSIZE 500int buf[BUFSIZE];int sz, IN;void format_and_print(int fmtlen, char *fmt, char *data);int main(){	IN = open("/dev/rtf0",O_RDONLY);	if(IN < 0){		fprintf(stderr,"Can't open the fifo\n");		exit(-1);	}	while( read(IN,&sz,sizeof(sz))  == sizeof(sz)){		/* this is the start */		if(read(IN,buf,sz) != sz){			printf("Format error!\n");		}		else{			int fmtlen = strlen( (char *)buf);			char *fmt = (char *)buf;			char *data = ((char *)buf)+fmtlen+1;			format_and_print(fmtlen,fmt,data);		}	}	return 0;}static int find_delim(const char *s,int index){	while( s[index] && (s[index] !='%'))index++;	return index;}static void ncpy(char *d, char *s,int n){	while(n--){  *d++ = *s++;}	return;}void format_and_print(int fmtlen, char *fmt, char *data){       	double D;       	int I;       	char *S;	char delim;	int i,start=0;	while(fmt[start]){		i = find_delim(fmt,start);		delim = fmt[i];		fmt[i] = 0;		fputs(&fmt[start],stdout);		if(delim) // not at the end, must be a %		{			start = i+2; // skip format letter			switch(fmt[i+1]) {			       	case 's':         				       	S = data;					data += strlen(S)+1;					printf("%s",S);				       	break;			       	case 'd':          					ncpy((char *)&I,data,sizeof(I));					printf("%d",I);					data += sizeof(I);					break;			       	case 'c':           /* C "promotes" chars*/					ncpy((char *)&I,data,sizeof(I));					printf("%c",I);					data += sizeof(I);					break;			       	case 'f':           					ncpy((char *)&D,data,sizeof(D));					printf("%f",D);					data += sizeof(D);				       	break;		       	}		}else start = i; // we're done.	}	fflush(stdout);}