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#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include "bas.h"
int target_var, lastline, assign, is_for, is_next, is_dim, is_read, is_input;
int in_dim, in_read, in_input;
int refcounts[128];
void print_help(void) {
fprintf(stderr, "Usage: %s program.bas\n", self);
exit(0);
}
CALLBACK(new_line) {
assign = is_for = is_next = is_dim = is_read = is_input = 0;
}
CALLBACK(end_line) {
if(lastline != lineno) return;
printf("%d", lineno);
if(assign || is_for || is_next || is_dim || is_read || is_input) {
putchar('=');
if(assign) putchar('A');
if(is_for) putchar('F');
if(is_next) putchar('N');
if(is_dim) putchar('D');
if(is_read) putchar('R');
if(is_input) putchar('I');
}
putchar(' ');
}
CALLBACK(new_command) {
switch(tok) {
case CMD_LET:
case CMD_ILET:
assign = 1; break;
case CMD_FOR:
is_for = 1; break;
case CMD_NEXT:
is_next = 1; break;
case CMD_DIM:
in_dim = 1; break;
case CMD_READ:
in_read= 1; break;
case CMD_INPUT:
in_input= 1; break;
default: break;
}
}
CALLBACK(end_stmt) {
in_dim = in_read = in_input = 0;
}
CALLBACK(handle_var) {
if(in_dim) is_dim = 1;
if(in_input) is_input = 1;
if(in_read) is_read = 1;
if(lastline == lineno) return;
if((tok & 0x7f) == target_var) {
refcounts[target_var]++;
lastline = lineno;
}
}
int main(int argc, char **argv) {
unsigned short pos;
unsigned short vnpos;
int unref = 0;
set_self(*argv);
parse_general_args(argc, argv, print_help);
open_input(argv[1]);
readfile();
parse_header();
on_var_token = handle_var;
on_start_line = new_line;
on_end_line = end_line;
on_cmd_token = new_command;
on_end_stmt = end_stmt;
target_var = 0;
vnpos = vnstart;
for(pos = vvstart; pos < codestart; pos += 8) {
/* print the variable name */
while(program[vnpos] < 0x80)
putchar(program[vnpos++]);
putchar(program[vnpos++] & 0x7f);
printf("/%02x: ", target_var | 0x80);
lastline = -1;
walk_all_code();
if(!refcounts[target_var]) {
unref++;
printf("(no references)");
} else {
printf("(%d)", refcounts[target_var]);
}
putchar('\n');
if(target_var++ == 128) break;
}
printf(" %d variables, %d unreferenced.\n", target_var, unref);
return 0;
}
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