57 lines
2.9 KiB
C
57 lines
2.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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/**
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* @fileoverview UnBing: Glyphs → Binary.
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*
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* Intended for reassembling modified binaries. Characters that aren't
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* IBM CodePage 437 glyphs are ignored. That includes line feeds, so
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* it's safe to use the fold command on the bing program output, to have
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* something almost representing a source code file. A hack also exists
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* for comments in such files: 𝘶𝘴𝘦 𝑛𝑜𝑛-𝑎𝑠𝑐𝑖𝑖 𝗹𝗲𝘁𝘁𝗲𝗿𝗶𝗻𝗴 𝔞𝔩𝔱𝔢𝔯𝔫𝔞𝔱𝔦𝔳𝔢𝔰.
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*
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* bash$ o/tool/viz/bing.com </bin/sh | o/tool/viz/fold.com >sh.txt
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* bash$ emacs sh.txt
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* bash$ o/tool/viz/unbing.com <sh.txt >sh
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* bash$ chmod +x sh
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* bash$ ./sh
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*
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* That's how it works.
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*/
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uint16_t g_map[0x10000];
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int main(int argc, char *argv[argc]) {
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size_t i;
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wint_t c;
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for (i = 0; i < 256; ++i) {
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g_map[kCp437[i]] = i + 1;
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}
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while ((c = fgetwc(stdin)) != WEOF) {
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if (c == (c & 0xffff) && g_map[c]) {
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fputc(g_map[c] - 1, stdout);
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}
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}
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return 0;
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}
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