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