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#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <math.h>
#include <errno.h>
#include "bas.h"
#include "bcdfp.h"
#include "tokens.h"
int immediate = 0, a8utf8 = 0, a8eol = 1;
FILE *outfh;
void print_help(void) {
printf("Usage: %s [-v] [-i] [-a|-u] <inputfile>\n", self);
printf(" -v: verbose.\n");
printf(" -i: show immediate mode command (line 32768).\n");
printf(" -a: output raw ATASCII.\n");
printf(" -u: output Unicode.\n");
}
void parse_args(int argc, char **argv) {
int opt;
while( (opt = getopt(argc, argv, "viau")) != -1) {
switch(opt) {
case 'v': verbose = 1; break;
case 'i': immediate = 1; break;
case 'a': a8utf8 = a8eol = 0; break;
case 'u': a8utf8 = 1; a8eol = 0; break;
default:
print_help();
exit(1);
}
}
if(optind >= argc)
die("No input file given (use - for stdin).");
else
open_input(argv[optind]);
}
void setup_outfh(void) {
const char *cmd;
/* search current dir before PATH. no easy way to detect errors here,
have to wait until we call pclose(). */
if(a8eol) {
cmd = "./a8eol -u -c 2>/dev/null || a8eol -u -c 2>/dev/null || exit 1";
} else if(a8utf8) {
cmd = "./a8utf8 2>/dev/null || a8utf8 2>/dev/null || exit 1";
} else {
if(isatty(fileno(stdout))) {
die("Refusing to write ATASCII data to the terminal.");
}
outfh = stdout;
return;
}
outfh = popen(cmd, "w");
if(!outfh) {
/* fork() or pipe() failed. does NOT detect if the command
wasn't found. */
perror(self);
exit(1);
}
}
void close_outfh(void) {
if(a8eol || a8utf8) {
if(pclose(outfh)) {
die("output filter failed; a8eol or a8utf8 not in current dir or $PATH.");
}
}
}
void outchr(char c) {
putc(c, outfh);
}
/* this should probably be moved to bcdfp.c */
double bcd2double(const unsigned char *num) {
double result = 0, sign;
int exp, i;
exp = *num;
if(!exp) {
return 0.0;
}
sign = (exp & 0x80 ? -1.0 : 1.0);
exp &= 0x7f;
exp -= 0x40;
for(i = 1; i < 6; i++) {
result *= 100.0;
result += bcd2int(num[i]);
}
result *= pow(100, exp - 4);
result *= sign;
return result;
}
void print_number(unsigned int pos) {
fprintf(outfh, "%G", bcd2double(program + pos));
}
void print_string(unsigned int pos, unsigned int len) {
outchr('"');
while(len--) outchr(program[pos++]);
outchr('"');
}
CALLBACK(print_lineno) {
fprintf(outfh, "%d ", lineno);
}
CALLBACK(print_cmd) {
const char *name;
if(tok == CMD_ILET) return;
if(tok > last_command || (!(name = commands[tok])))
fprintf(outfh, "(bad cmd token $%02x) ", tok);
else
fprintf(outfh, "%s ", name);
}
CALLBACK(print_op) {
const char *name;
switch(tok) {
case OP_NUMCONST:
print_number(pos + 1);
return;
case OP_STRCONST:
print_string(pos + 2, program[pos + 1]);
return;
case OP_EOL:
return;
default: break;
}
if(tok > last_operator || (!(name = operators[tok])))
fprintf(outfh, "(bad op token $%02x)", tok);
else
fprintf(outfh, "%s", name);
}
CALLBACK(print_varname) {
int i, count;
unsigned char c;
tok &= 0x7f;
for(i = vnstart, count = 0; count < tok; i++) {
if(program[i] & 0x80) count++;
}
do {
outchr( (c = program[i++]) & 0x7f);
} while (c < 0x80);
}
CALLBACK(print_text) {
while(program[pos] != 0x9b) outchr(program[pos++]);
}
CALLBACK(print_newline) {
outchr(0x9b);
}
CALLBACK(code_prot) {
fprintf(stderr, "%s: Program is code-protected, stopping at line %d.\n", self, lineno);
close_outfh();
exit(0);
}
void list(void) {
on_start_line = print_lineno;
on_cmd_token = print_cmd;
on_exp_token = print_op;
on_var_token = print_varname;
on_end_line = print_newline;
on_text = print_text;
on_bad_line_length = code_prot;
walk_code(0, 32767 + immediate);
}
int main(int argc, char **argv) {
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.");
setup_outfh();
list();
close_outfh();
return 0;
}
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