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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 startlineno = 0;
int endlineno = 32768;
/* dump tokens for each line in a BASIC program. easier to read than
a plain hex dump. */
void print_help(void) {
fprintf(stderr, "Usage: %s [-v] [-s start-lineno] [-e end-lineno] <inputfile>\n", self);
}
unsigned short getlineno(char opt, const char *arg) {
int lineno;
char *e;
lineno = (int)strtol(arg, &e, 10);
if(*e) {
fprintf(stderr, "%s: Invalid line number for -%c option: %s is not a number.\n",
self, opt, arg);
exit(1);
}
if(lineno < 0 || lineno > 32767) {
fprintf(stderr, "%s: Invalid line number for -%c option: %d > 32767.\n",
self, opt, lineno);
exit(1);
}
return ((unsigned short)lineno);
}
void parse_args(int argc, char **argv) {
int opt;
while( (opt = getopt(argc, argv, "vs:e:l:")) != -1) {
switch(opt) {
case 'v': verbose = 1; break;
case 's': startlineno = getlineno(opt, optarg); break;
case 'e': endlineno = getlineno(opt, optarg); break;
case 'l': startlineno = getlineno(opt, optarg);
endlineno = startlineno; break;
default:
print_help();
exit(1);
}
}
if(optind >= argc)
die("No input file given (use - for stdin).");
else
open_input(argv[optind]);
}
void print_atascii(unsigned char c) {
if(c & 0x80) {
putchar('|');
c &= 0x7f;
}
if(c < 32) {
putchar('^');
c += 0x40;
}
if(c == 0x7f)
printf("del");
else
putchar(c);
putchar('/');
}
/* REM, DATA, ERROR lines are terminated by $9B, a real EOL, not
the BASIC token. Since they're strings, print them in ASCII too. */
int handle_text_stmt(int pos) {
unsigned char c;
do {
c = program[pos];
print_atascii(c);
printf("%02x ", c);
pos++;
} while(c != 0x9b);
return pos;
}
int handle_cmd(int pos) {
unsigned char tok = program[pos];
printf("!%02x ", tok);
switch(tok) {
case CMD_REM:
case CMD_DATA:
case CMD_ERROR:
return handle_text_stmt(pos + 1);
default:
return pos + 1;
}
}
void handle_string(int pos) {
int i, len;
len = program[pos + 1];
printf("$%02x =%02x \"", program[pos], len);
for(i = pos; i < pos + len; i++) {
unsigned char c = program[i + 2];
print_atascii(c);
printf("%02x%c", c, (i == (pos + len - 1) ? '"' : ' '));
}
putchar(' ');
}
void handle_num(int pos) {
int i;
printf("#%02x [", program[pos]);
for(i = 0; i < 6; i++)
printf("%02x%c", program[pos + 1 + i], (i == 5 ? ']' : ' '));
putchar(' ');
}
/* sorry, this is horrid, more like assembly than C. */
int main(int argc, char **argv) {
int linepos, nextpos, offset, soffset, lineno, pos, end, tok;
set_self(*argv);
parse_general_args(argc, argv, print_help);
parse_args(argc, argv);
readfile();
parse_header();
linepos = codestart;
while(linepos < filelen) { /* loop over lines */
lineno = getword(linepos);
offset = program[linepos + 2];
nextpos = linepos + offset;
if(offset < 6)
die("Can't dump a protected program, unprotect it first.");
if(lineno < startlineno) {
linepos = nextpos;
continue;
}
/* line header */
printf("%5d@%04x (%02x %02x): ^%02x ",
lineno, linepos, program[linepos], program[linepos + 1], offset);
pos = linepos + 3;
while(pos < nextpos) { /* loop over statements within a line */
soffset = program[pos];
end = linepos + soffset;
while(pos < end) { /* loop over tokens within a statement */
printf("\n >%02x ", program[pos++]); /* offset */
pos = handle_cmd(pos++); /* 1st token is the command */
while(pos < end) { /* loop over operators */
tok = program[pos];
switch(tok) {
case OP_NUMCONST:
handle_num(pos);
pos += 7;
break;
case OP_STRCONST:
handle_string(pos);
pos += program[pos + 1] + 2;
break;
default:
printf("%02x", program[pos]);
if(pos == (end - 1) && tok == OP_EOS)
putchar(':');
else
putchar(' ');
pos++;
break;
}
}
}
}
putchar('\n');
if(lineno == endlineno) break;
linepos = nextpos;
}
return 0;
}
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