root/paper-tape-project/trunk/puncher/frontend.cli-simple.c

/**
 * abgespecktes frontend for testing purpose.
 * C source.
 *
 **/
 
#include <stdio.h>
#include <io.h>
#include <stdlib.h>
#include "backend.h"

void puncher_frontend_visualize_byte(unsigned char buf) {
        /* Draw a papertape byte (like the perl program) */
        unsigned char against = 0x01;
        unsigned char check;
        int pos;
        
        printf("|");
        for(pos=0; pos < 8; pos++) {
                if(pos == 3) /* Streifenfuehrung */
                        printf(".");
                check = buf;
                check >>= pos;
                
                if((check & against) == 0)
                        printf(" "); /* bit nicht gesetzt */
                else
                        printf("*"); /* bit gesetzt */
        } /*for */
        printf("|");
}

 
int main(int argc, char **argv) {
        PuncherBackend *puncher;
        int ret;

        printf("Paper Tape Project -- Windows user mode puncher\n");
        
        puncher = puncher_backend_new(1);

        for(int xy=0;;xy++) {
                unsigned char buf; /* stdin 1 byte buffer */

                ret = read(0, &buf, 1); /* 1 byte from stdin */
                if(ret < 0) {
                        printf("HARD READ IN EROR\n");
                        puncher_backend_destroy(puncher);
                        return 1;
                }

                if(ret == 0) {/* EOF, end of input, etc. */
                        printf("EOF STDIN.\n");
                        break;
                }

                /* Visualisation of the byte in a stdout line */
                puncher_frontend_visualize_byte(buf);
                printf(" 0x%02x=%03i ", buf, buf);

        /* call the backend */
        ret = puncher_backend_write_byte(puncher, buf);

                if(ret < 0) {
                        printf("BACKEND HARD ERROR: calling write backend\n");
                        puncher_backend_destroy(puncher);
                        return 1;
                } else if(ret == 0) {
                        printf("=)\n"); // everything okay
                } else if(ret == 1) {
                        printf(":-(\n"); // punch not okay, but go on.
                }
        } /* for stdin */

        if(puncher_backend_destroy(puncher)) {
                perror("finishing backend");
                return 1;
        } else
                return 0;
}