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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 A, F, N, D, I, R, G, O, L;
int target_var, lastline;
unsigned char last_cmd = 0;
int refcounts[128];
void print_help(void) {
printf("Usage: %s [-v] program.bas\n", self);
exit(0);
}
CALLBACK(new_line) {
A = F = N = D = I = R = G = O = L = 0;
}
CALLBACK(end_line) {
if(lastline != lineno) return;
if(A || F || N || D || I || R || G || O || L) {
putchar('=');
if(A) putchar('A');
if(F) putchar('F');
if(N) putchar('N');
if(D) putchar('D');
if(I) putchar('I');
if(R) putchar('R');
if(G) putchar('G');
if(O) putchar('O');
if(L) putchar('L');
}
putchar(' ');
}
CALLBACK(new_command) {
last_cmd = tok;
}
CALLBACK(end_stmt) {
last_cmd = 0;
}
CALLBACK(handle_var) {
unsigned char last_tok, next_tok;
int was_cmd, was_comma, was_semicolon;
if(tok != (target_var | 0x80)) return;
if(lastline != lineno) {
printf("%d", lineno);
refcounts[target_var]++;
}
lastline = lineno;
last_tok = program[pos - 1];
next_tok = program[pos + 1];
was_cmd = (last_tok == last_cmd);
was_comma = (last_tok == OP_COMMA);
was_semicolon = (last_tok == OP_SEMICOLON);
switch(last_cmd) {
case CMD_LET:
case CMD_ILET:
if(was_cmd) A = 1;
break;
case CMD_FOR:
if(was_cmd) F = 1;
break;
case CMD_NEXT:
if(was_cmd) N = 1;
break;
case CMD_DIM:
if(was_cmd || was_comma) D = 1;
break;
case CMD_INPUT: /* INPUT #1;A and INPUT #1,A are both allowed, grr. */
if(was_cmd || was_comma || was_semicolon) I = 1;
break;
case CMD_READ:
if(was_cmd || was_comma) R = 1;
break;
case CMD_GET:
if(was_comma) G = 1;
break;
case CMD_NOTE:
if(was_comma) O = 1;
break;
case CMD_LOCATE:
if(next_tok == OP_EOS || next_tok == OP_EOL) L = 1;
break;
}
}
void parse_args(int argc, char **argv) {
int opt;
while( (opt = getopt(argc, argv, "v")) != -1) {
switch(opt) {
case 'v': verbose = 1; break;
default: print_help(); exit(1);
}
}
if(optind >= argc)
die("No input file given (use - for stdin).");
else
open_input(argv[optind]);
}
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);
parse_args(argc, argv);
readfile();
parse_header();
if(!vntable_ok())
die("Program is variable-protected; unprotect it first.");
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;
/* walk the variable value table */
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');
/* ignore any ERROR-4 vars, since they don't have tokens anyway. */
if(++target_var == 128) break;
}
printf(" %d variables, %d unreferenced.\n", target_var, unref);
return 0;
}
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