/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#ifndef __COSMOPOLITAN__
#include <stdio.h>
#include <wchar.h>
#include <wctype.h>
#endif
#include "blc.h"

char GetBit(FILE* f) {
  wint_t c;
  char comment;
  static wint_t buf, mask;
  if (!binary) {
    for (comment = 0;;) {
      c = fgetwc(f);
      if (c == -1) break;
      if (!comment) {
        fflush(stdout);
        if (c == ';') {
          comment = 1;
        } else if (!iswspace(c) && c != '(' && c != ')' && c != '[' &&
                   c != ']') {
          if (c != -1) c &= 1;
          break;
        }
      } else if (c == '\n') {
        comment = 0;
      }
    }
  } else if (mask) {
    c = !!(buf & mask);
    mask >>= 1;
  } else {
    c = fgetc(f);
    if (c != -1) {
      buf = c;
      c = (c >> 7) & 1;
      mask = 64;
    }
  }
  return c;
}