52 lines
2.9 KiB
C
52 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/assert.h"
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#include "libc/fmt/bing.h"
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#include "libc/log/check.h"
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#include "libc/runtime/runtime.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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* Decodes human-readable CP437 glyphs into binary, e.g.
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*
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* char binged[5];
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* char golden[5] = "\0\1\2\3\4";
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* unbingbuf(binged, sizeof(binged), u" ☺☻♥♦", -1);
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* CHECK_EQ(0, memcmp(binged, golden, 5));
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*
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* @param buf is caller owned
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* @param size is byte length of buf
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* @param glyphs is UCS-2 encoded CP437 representation of binary data
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* @param fill if -1 will memset any remaining buffer space
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* @note no NUL terminator is added to end of buf
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* @see tunbing(), unbingstr(), unbing()
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*/
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void *unbingbuf(void *buf, size_t size, const char16_t *glyphs, int fill) {
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int b;
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char *p, *pe;
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for (p = buf, pe = p + size; p < pe && *glyphs; ++p, ++glyphs) {
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*p = (b = unbing(*glyphs)) & 0xff;
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/* DCHECK_NE(-1, b, "%`'hc ∉ IBMCP437\n", *glyphs); */
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}
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if (fill != -1) memset(p, fill, pe - p);
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return buf;
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}
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