1 /* 2 * Copyright (C) 2007 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 #ifndef _LIBS_CUTILS_EVENTTAGMAP_H 18 #define _LIBS_CUTILS_EVENTTAGMAP_H 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 #define EVENT_TAG_MAP_FILE "/system/etc/event-log-tags" 25 26 struct EventTagMap; 27 typedef struct EventTagMap EventTagMap; 28 29 /* 30 * Open the specified file as an event log tag map. 31 * 32 * Returns NULL on failure. 33 */ 34 EventTagMap* android_openEventTagMap(const char* fileName); 35 36 /* 37 * Close the map. 38 */ 39 void android_closeEventTagMap(EventTagMap* map); 40 41 /* 42 * Look up a tag by index. Returns the tag string, or NULL if not found. 43 */ 44 const char* android_lookupEventTag(const EventTagMap* map, unsigned int tag) 45 __attribute__(( 46 deprecated("use android_lookupEventTag_len() instead to minimize " 47 "MAP_PRIVATE copy-on-write memory impact"))); 48 49 /* 50 * Look up a tag by index. Returns the tag string & string length, or NULL if 51 * not found. Returned string is not guaranteed to be nul terminated. 52 */ 53 const char* android_lookupEventTag_len(const EventTagMap* map, size_t* len, 54 unsigned int tag); 55 56 /* 57 * Look up a format by index. Returns the format string & string length, 58 * or NULL if not found. Returned string is not guaranteed to be nul terminated. 59 */ 60 const char* android_lookupEventFormat_len(const EventTagMap* map, size_t* len, 61 unsigned int tag); 62 63 /* 64 * Look up tagname, generate one if necessary, and return a tag 65 */ 66 int android_lookupEventTagNum(EventTagMap* map, const char* tagname, 67 const char* format, int prio); 68 69 #ifdef __cplusplus 70 } 71 #endif 72 73 #endif /*_LIBS_CUTILS_EVENTTAGMAP_H*/ 74