61 lines
3.0 KiB
C
61 lines
3.0 KiB
C
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/*-*- 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/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "tool/decode/lib/disassemblehex.h"
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static size_t countzeroes(const uint8_t *data, size_t size) {
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size_t i;
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for (i = 0; i < size; ++i) {
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if (data[i] != '\0') break;
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}
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return i;
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}
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void disassemblehex(uint8_t *data, size_t size, FILE *f) {
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int col;
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uint8_t ch;
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size_t i, z;
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char16_t glyphs[kDisassembleHexColumns + 1];
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col = 0;
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for (i = 0; i < size; ++i) {
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ch = data[i];
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if (!col) {
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z = countzeroes(&data[i], size - i) / kDisassembleHexColumns;
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if (z > 2) {
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fprintf(f, "\t.%s\t%zu*%d\n", "zero", z, kDisassembleHexColumns);
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i += z * kDisassembleHexColumns;
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if (i == size) break;
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}
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fprintf(f, "\t.%s\t", "byte");
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memset(glyphs, 0, sizeof(glyphs));
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}
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/* TODO(jart): Fix Emacs */
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glyphs[col] = kCp437[ch == '"' || ch == '\\' || ch == '#' ? '.' : ch];
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if (col) fputc(',', f);
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fprintf(f, "0x%02x", ch);
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if (++col == kDisassembleHexColumns) {
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col = 0;
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fprintf(f, "\t#%hs\n", glyphs);
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}
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}
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if (col) fputc('\n', f);
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}
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