1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "chre/util/nanoapp/debug.h" 18 19 #include <cctype> 20 #include <cstdio> 21 22 #ifdef CHRE_NANOAPP_INTERNAL 23 #include "chre/platform/log.h" 24 #else 25 #define LOG_TAG "[DEBUG]" 26 #include "chre/util/nanoapp/log.h" 27 #endif 28 29 namespace chre { 30 31 void logBuffer(const uint8_t *buffer, size_t bufferSize) { 32 char line[32]; 33 char lineChars[32]; 34 size_t offset = 0; 35 size_t offsetChars = 0; 36 37 if (bufferSize > 128) { 38 LOGD("Dumping first 128 bytes of buffer @ %p, size %zu", 39 buffer, bufferSize); 40 bufferSize = 128; 41 } else { 42 LOGD("Dumping buffer @ %p, size %zu", buffer, bufferSize); 43 } 44 45 for (size_t i = 1; i <= bufferSize; i++) { 46 // This ignores potential errors returned by snprintf. This is a relatively 47 // simple case and the deliberate decision to ignore them has been made. 48 offset += static_cast<size_t>( 49 snprintf(&line[offset], sizeof(line) - offset, "%02x ", buffer[i - 1])); 50 offsetChars += static_cast<size_t>( 51 snprintf(&lineChars[offsetChars], sizeof(lineChars) - offsetChars, 52 "%c", (isprint(buffer[i - 1])) ? buffer[i - 1] : '.')); 53 if ((i % 8) == 0) { 54 LOGD(" %s\t%s", line, lineChars); 55 offset = 0; 56 offsetChars = 0; 57 } else if ((i % 4) == 0) { 58 offset += static_cast<size_t>( 59 snprintf(&line[offset], sizeof(line) - offset, " ")); 60 } 61 } 62 63 if (offset > 0) { 64 char tabs[8]; 65 char *pos = tabs; 66 while (offset < 28) { 67 *pos++ = '\t'; 68 offset += 8; 69 } 70 *pos = '\0'; 71 LOGD(" %s%s%s", line, tabs, lineChars); 72 } 73 } 74 75 } // namespace chre 76
