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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "hex_dump.h"
#include "globals.h"
#include <string.h>
namespace art {
void HexDump::Dump(std::ostream& os) const {
if (byte_count_ == 0) {
return;
}
if (address_ == nullptr) {
os << "00000000:";
return;
}
static const char gHexDigit[] = "0123456789abcdef";
const unsigned char* addr = reinterpret_cast<const unsigned char*>(address_);
// 01234560: 00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff 0123456789abcdef
char out[(kBitsPerIntPtrT / 4) + /* offset */
1 + /* colon */
(16 * 3) + /* 16 hex digits and space */
2 + /* white space */
16 + /* 16 characters*/
1 /* \0 */ ];
size_t offset; /* offset to show while printing */
if (show_actual_addresses_) {
offset = reinterpret_cast<size_t>(addr);
} else {
offset = 0;
}
memset(out, ' ', sizeof(out)-1);
out[kBitsPerIntPtrT / 4] = ':';
out[sizeof(out)-1] = '\0';
size_t byte_count = byte_count_;
size_t gap = offset & 0x0f;
while (byte_count > 0) {
size_t line_offset = offset & ~0x0f;
char* hex = out;
char* asc = out + (kBitsPerIntPtrT / 4) + /* offset */ 1 + /* colon */
(16 * 3) + /* 16 hex digits and space */ 2 /* white space */;
for (int i = 0; i < (kBitsPerIntPtrT / 4); i++) {
*hex++ = gHexDigit[line_offset >> (kBitsPerIntPtrT - 4)];
line_offset <<= 4;
}
hex++;
hex++;
size_t count = std::min(byte_count, 16 - gap);
// CHECK_NE(count, 0U);
// CHECK_LE(count + gap, 16U);
if (gap) {
/* only on first line */
hex += gap * 3;
asc += gap;
}
size_t i;
for (i = gap ; i < count + gap; i++) {
*hex++ = gHexDigit[*addr >> 4];
*hex++ = gHexDigit[*addr & 0x0f];
hex++;
if (*addr >= 0x20 && *addr < 0x7f /*isprint(*addr)*/) {
*asc++ = *addr;
} else {
*asc++ = '.';
}
addr++;
}
for (; i < 16; i++) {
/* erase extra stuff; only happens on last line */
*hex++ = ' ';
*hex++ = ' ';
hex++;
*asc++ = ' ';
}
os << prefix_ << out;
gap = 0;
byte_count -= count;
offset += count;
if (byte_count > 0) {
os << "\n";
}
}
}
} // namespace art
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