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 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 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. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/stdio/stdio.h"
|
|
#include "libc/str/str.h"
|
|
#include "tool/decode/lib/disassemblehex.h"
|
|
|
|
static size_t countzeroes(const uint8_t *data, size_t size) {
|
|
size_t i;
|
|
for (i = 0; i < size; ++i) {
|
|
if (data[i] != '\0') break;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
void disassemblehex(uint8_t *data, size_t size, FILE *f) {
|
|
int col;
|
|
uint8_t ch;
|
|
size_t i, z;
|
|
char16_t glyphs[kDisassembleHexColumns + 1];
|
|
col = 0;
|
|
for (i = 0; i < size; ++i) {
|
|
ch = data[i];
|
|
if (!col) {
|
|
z = countzeroes(&data[i], size - i) / kDisassembleHexColumns;
|
|
if (z > 2) {
|
|
fprintf(f, "\t.%s\t%zu*%d\n", "zero", z, kDisassembleHexColumns);
|
|
i += z * kDisassembleHexColumns;
|
|
if (i == size) break;
|
|
}
|
|
fprintf(f, "\t.%s\t", "byte");
|
|
memset(glyphs, 0, sizeof(glyphs));
|
|
}
|
|
/* TODO(jart): Fix Emacs */
|
|
glyphs[col] = kCp437[ch == '"' || ch == '\\' || ch == '#' ? '.' : ch];
|
|
if (col) fputc(',', f);
|
|
fprintf(f, "0x%02x", ch);
|
|
if (++col == kDisassembleHexColumns) {
|
|
col = 0;
|
|
fprintf(f, "\t#%hs\n", glyphs);
|
|
}
|
|
}
|
|
if (col) fputc('\n', f);
|
|
}
|