mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 12:03:41 +00:00
3f49889841
- Fix preadv() and pwritev() for old distros - Introduce _npassert() and _unassert() macros - Prove that file locks work properly on Windows - Support fcntl(F_DUPFD_CLOEXEC) on more systems
60 lines
2.9 KiB
C
60 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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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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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 "libc/str/tab.internal.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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bzero(glyphs, 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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