510 lines
17 KiB
C++
510 lines
17 KiB
C++
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// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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*
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* Copyright (C) 2003-2013, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: utrace.h
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* encoding: UTF-8
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2003aug06
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* created by: Markus W. Scherer
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*
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* Definitions for ICU tracing/logging.
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*
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*/
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#ifndef __UTRACE_H__
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#define __UTRACE_H__
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#include <stdarg.h>
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#include "unicode/utypes.h"
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/**
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* \file
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* \brief C API: Definitions for ICU tracing/logging.
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*
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* This provides API for debugging the internals of ICU without the use of
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* a traditional debugger.
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*
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* By default, tracing is disabled in ICU. If you need to debug ICU with
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* tracing, please compile ICU with the --enable-tracing configure option.
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*/
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U_CDECL_BEGIN
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/**
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* Trace severity levels. Higher levels increase the verbosity of the trace output.
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* @see utrace_setLevel
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* @stable ICU 2.8
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*/
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typedef enum UTraceLevel {
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/** Disable all tracing @stable ICU 2.8*/
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UTRACE_OFF=-1,
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/** Trace error conditions only @stable ICU 2.8*/
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UTRACE_ERROR=0,
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/** Trace errors and warnings @stable ICU 2.8*/
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UTRACE_WARNING=3,
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/** Trace opens and closes of ICU services @stable ICU 2.8*/
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UTRACE_OPEN_CLOSE=5,
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/** Trace an intermediate number of ICU operations @stable ICU 2.8*/
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UTRACE_INFO=7,
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/** Trace the maximum number of ICU operations @stable ICU 2.8*/
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UTRACE_VERBOSE=9
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} UTraceLevel;
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/**
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* These are the ICU functions that will be traced when tracing is enabled.
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* @stable ICU 2.8
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*/
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typedef enum UTraceFunctionNumber {
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UTRACE_FUNCTION_START=0,
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UTRACE_U_INIT=UTRACE_FUNCTION_START,
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UTRACE_U_CLEANUP,
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#ifndef U_HIDE_DEPRECATED_API
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/**
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* One more than the highest normal collation trace location.
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* @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
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*/
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UTRACE_FUNCTION_LIMIT,
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#endif // U_HIDE_DEPRECATED_API
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UTRACE_CONVERSION_START=0x1000,
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UTRACE_UCNV_OPEN=UTRACE_CONVERSION_START,
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UTRACE_UCNV_OPEN_PACKAGE,
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UTRACE_UCNV_OPEN_ALGORITHMIC,
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UTRACE_UCNV_CLONE,
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UTRACE_UCNV_CLOSE,
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UTRACE_UCNV_FLUSH_CACHE,
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UTRACE_UCNV_LOAD,
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UTRACE_UCNV_UNLOAD,
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#ifndef U_HIDE_DEPRECATED_API
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/**
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* One more than the highest normal collation trace location.
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* @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
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*/
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UTRACE_CONVERSION_LIMIT,
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#endif // U_HIDE_DEPRECATED_API
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UTRACE_COLLATION_START=0x2000,
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UTRACE_UCOL_OPEN=UTRACE_COLLATION_START,
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UTRACE_UCOL_CLOSE,
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UTRACE_UCOL_STRCOLL,
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UTRACE_UCOL_GET_SORTKEY,
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UTRACE_UCOL_GETLOCALE,
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UTRACE_UCOL_NEXTSORTKEYPART,
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UTRACE_UCOL_STRCOLLITER,
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UTRACE_UCOL_OPEN_FROM_SHORT_STRING,
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UTRACE_UCOL_STRCOLLUTF8, /**< @stable ICU 50 */
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#ifndef U_HIDE_DEPRECATED_API
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/**
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* One more than the highest normal collation trace location.
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* @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
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*/
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UTRACE_COLLATION_LIMIT,
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#endif // U_HIDE_DEPRECATED_API
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/**
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* The lowest resource/data location.
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* @stable ICU 65
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*/
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UTRACE_UDATA_START=0x3000,
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/**
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* Indicates that a value was read from a resource bundle. Provides three
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* C-style strings to UTraceData: type, file name, and resource path. The
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* possible types are:
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*
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* - "string" (a string value was accessed)
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* - "binary" (a binary value was accessed)
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* - "intvector" (a integer vector value was accessed)
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* - "int" (a signed integer value was accessed)
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* - "uint" (a unsigned integer value was accessed)
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* - "get" (a path was loaded, but the value was not accessed)
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* - "getalias" (a path was loaded, and an alias was resolved)
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*
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* @stable ICU 65
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*/
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UTRACE_UDATA_RESOURCE=UTRACE_UDATA_START,
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/**
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* Indicates that a resource bundle was opened.
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*
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* Provides one C-style string to UTraceData: file name.
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* @stable ICU 65
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*/
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UTRACE_UDATA_BUNDLE,
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/**
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* Indicates that a data file was opened, but not *.res files.
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*
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* Provides one C-style string to UTraceData: file name.
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*
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* @stable ICU 65
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*/
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UTRACE_UDATA_DATA_FILE,
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/**
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* Indicates that a *.res file was opened.
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*
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* This differs from UTRACE_UDATA_BUNDLE because a res file is typically
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* opened only once per application runtime, but the bundle corresponding
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* to that res file may be opened many times.
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*
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* Provides one C-style string to UTraceData: file name.
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*
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* @stable ICU 65
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*/
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UTRACE_UDATA_RES_FILE,
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#ifndef U_HIDE_INTERNAL_API
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/**
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* One more than the highest normal resource/data trace location.
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* @internal The numeric value may change over time, see ICU ticket #12420.
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*/
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UTRACE_RES_DATA_LIMIT,
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#endif // U_HIDE_INTERNAL_API
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#ifndef U_HIDE_DRAFT_API
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/**
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* The lowest break iterator location.
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* @draft ICU 67
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*/
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UTRACE_UBRK_START=0x4000,
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/**
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* Indicates that a character instance of break iterator was created.
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*
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* @draft ICU 67
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*/
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UTRACE_UBRK_CREATE_CHARACTER = UTRACE_UBRK_START,
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/**
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* Indicates that a word instance of break iterator was created.
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*
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* @draft ICU 67
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*/
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UTRACE_UBRK_CREATE_WORD,
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/**
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* Indicates that a line instance of break iterator was created.
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*
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* Provides one C-style string to UTraceData: the lb value ("",
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* "loose", "strict", or "normal").
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*
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* @draft ICU 67
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*/
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UTRACE_UBRK_CREATE_LINE,
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/**
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* Indicates that a sentence instance of break iterator was created.
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*
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* @draft ICU 67
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*/
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UTRACE_UBRK_CREATE_SENTENCE,
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/**
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* Indicates that a title instance of break iterator was created.
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*
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* @draft ICU 67
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*/
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UTRACE_UBRK_CREATE_TITLE,
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/**
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* Indicates that an internal dictionary break engine was created.
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*
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* Provides one C-style string to UTraceData: the script code of what
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* the break engine cover ("Hani", "Khmr", "Laoo", "Mymr", or "Thai").
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*
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* @draft ICU 67
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*/
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UTRACE_UBRK_CREATE_BREAK_ENGINE,
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#endif // U_HIDE_DRAFT_API
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#ifndef U_HIDE_INTERNAL_API
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/**
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* One more than the highest normal break iterator trace location.
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* @internal The numeric value may change over time, see ICU ticket #12420.
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*/
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UTRACE_UBRK_LIMIT,
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#endif // U_HIDE_INTERNAL_API
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} UTraceFunctionNumber;
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/**
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* Setter for the trace level.
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* @param traceLevel A UTraceLevel value.
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* @stable ICU 2.8
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*/
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U_CAPI void U_EXPORT2
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utrace_setLevel(int32_t traceLevel);
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/**
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* Getter for the trace level.
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* @return The UTraceLevel value being used by ICU.
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* @stable ICU 2.8
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*/
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U_CAPI int32_t U_EXPORT2
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utrace_getLevel(void);
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/* Trace function pointers types ----------------------------- */
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/**
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* Type signature for the trace function to be called when entering a function.
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* @param context value supplied at the time the trace functions are set.
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* @param fnNumber Enum value indicating the ICU function being entered.
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* @stable ICU 2.8
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*/
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typedef void U_CALLCONV
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UTraceEntry(const void *context, int32_t fnNumber);
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/**
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* Type signature for the trace function to be called when exiting from a function.
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* @param context value supplied at the time the trace functions are set.
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* @param fnNumber Enum value indicating the ICU function being exited.
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* @param fmt A formatting string that describes the number and types
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* of arguments included with the variable args. The fmt
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* string has the same form as the utrace_vformat format
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* string.
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* @param args A variable arguments list. Contents are described by
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* the fmt parameter.
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* @see utrace_vformat
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* @stable ICU 2.8
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*/
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typedef void U_CALLCONV
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UTraceExit(const void *context, int32_t fnNumber,
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const char *fmt, va_list args);
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/**
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* Type signature for the trace function to be called from within an ICU function
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* to display data or messages.
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* @param context value supplied at the time the trace functions are set.
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* @param fnNumber Enum value indicating the ICU function being exited.
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* @param level The current tracing level
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* @param fmt A format string describing the tracing data that is supplied
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* as variable args
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* @param args The data being traced, passed as variable args.
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* @stable ICU 2.8
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*/
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typedef void U_CALLCONV
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UTraceData(const void *context, int32_t fnNumber, int32_t level,
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const char *fmt, va_list args);
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/**
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* Set ICU Tracing functions. Installs application-provided tracing
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* functions into ICU. After doing this, subsequent ICU operations
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* will call back to the installed functions, providing a trace
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* of the use of ICU. Passing a NULL pointer for a tracing function
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* is allowed, and inhibits tracing action at points where that function
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* would be called.
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* <p>
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* Tracing and Threads: Tracing functions are global to a process, and
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* will be called in response to ICU operations performed by any
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* thread. If tracing of an individual thread is desired, the
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* tracing functions must themselves filter by checking that the
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* current thread is the desired thread.
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*
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* @param context an uninterpreted pointer. Whatever is passed in
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* here will in turn be passed to each of the tracing
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* functions UTraceEntry, UTraceExit and UTraceData.
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* ICU does not use or alter this pointer.
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* @param e Callback function to be called on entry to a
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* a traced ICU function.
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* @param x Callback function to be called on exit from a
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* traced ICU function.
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* @param d Callback function to be called from within a
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* traced ICU function, for the purpose of providing
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* data to the trace.
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*
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* @stable ICU 2.8
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*/
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U_CAPI void U_EXPORT2
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utrace_setFunctions(const void *context,
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UTraceEntry *e, UTraceExit *x, UTraceData *d);
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/**
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* Get the currently installed ICU tracing functions. Note that a null function
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* pointer will be returned if no trace function has been set.
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*
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* @param context The currently installed tracing context.
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* @param e The currently installed UTraceEntry function.
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* @param x The currently installed UTraceExit function.
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* @param d The currently installed UTraceData function.
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* @stable ICU 2.8
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*/
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U_CAPI void U_EXPORT2
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utrace_getFunctions(const void **context,
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UTraceEntry **e, UTraceExit **x, UTraceData **d);
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/*
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*
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* ICU trace format string syntax
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*
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* Format Strings are passed to UTraceData functions, and define the
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* number and types of the trace data being passed on each call.
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*
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* The UTraceData function, which is supplied by the application,
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* not by ICU, can either forward the trace data (passed via
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* varargs) and the format string back to ICU for formatting into
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* a displayable string, or it can interpret the format itself,
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* and do as it wishes with the trace data.
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*
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*
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* Goals for the format string
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* - basic data output
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* - easy to use for trace programmer
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* - sufficient provision for data types for trace output readability
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* - well-defined types and binary portable APIs
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*
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* Non-goals
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* - printf compatibility
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* - fancy formatting
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* - argument reordering and other internationalization features
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*
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* ICU trace format strings contain plain text with argument inserts,
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* much like standard printf format strings.
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* Each insert begins with a '%', then optionally contains a 'v',
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* then exactly one type character.
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* Two '%' in a row represent a '%' instead of an insert.
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* The trace format strings need not have \n at the end.
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*
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||
|
|
*
|
||
|
|
* Types
|
||
|
|
* -----
|
||
|
|
*
|
||
|
|
* Type characters:
|
||
|
|
* - c A char character in the default codepage.
|
||
|
|
* - s A NUL-terminated char * string in the default codepage.
|
||
|
|
* - S A UChar * string. Requires two params, (ptr, length). Length=-1 for nul term.
|
||
|
|
* - b A byte (8-bit integer).
|
||
|
|
* - h A 16-bit integer. Also a 16 bit Unicode code unit.
|
||
|
|
* - d A 32-bit integer. Also a 20 bit Unicode code point value.
|
||
|
|
* - l A 64-bit integer.
|
||
|
|
* - p A data pointer.
|
||
|
|
*
|
||
|
|
* Vectors
|
||
|
|
* -------
|
||
|
|
*
|
||
|
|
* If the 'v' is not specified, then one item of the specified type
|
||
|
|
* is passed in.
|
||
|
|
* If the 'v' (for "vector") is specified, then a vector of items of the
|
||
|
|
* specified type is passed in, via a pointer to the first item
|
||
|
|
* and an int32_t value for the length of the vector.
|
||
|
|
* Length==-1 means zero or NUL termination. Works for vectors of all types.
|
||
|
|
*
|
||
|
|
* Note: %vS is a vector of (UChar *) strings. The strings must
|
||
|
|
* be nul terminated as there is no way to provide a
|
||
|
|
* separate length parameter for each string. The length
|
||
|
|
* parameter (required for all vectors) is the number of
|
||
|
|
* strings, not the length of the strings.
|
||
|
|
*
|
||
|
|
* Examples
|
||
|
|
* --------
|
||
|
|
*
|
||
|
|
* These examples show the parameters that will be passed to an application's
|
||
|
|
* UTraceData() function for various formats.
|
||
|
|
*
|
||
|
|
* - the precise formatting is up to the application!
|
||
|
|
* - the examples use type casts for arguments only to _show_ the types of
|
||
|
|
* arguments without needing variable declarations in the examples;
|
||
|
|
* the type casts will not be necessary in actual code
|
||
|
|
*
|
||
|
|
* UTraceDataFunc(context, fnNumber, level,
|
||
|
|
* "There is a character %c in the string %s.", // Format String
|
||
|
|
* (char)c, (const char *)s); // varargs parameters
|
||
|
|
* -> There is a character 0x42 'B' in the string "Bravo".
|
||
|
|
*
|
||
|
|
* UTraceDataFunc(context, fnNumber, level,
|
||
|
|
* "Vector of bytes %vb vector of chars %vc",
|
||
|
|
* (const uint8_t *)bytes, (int32_t)bytesLength,
|
||
|
|
* (const char *)chars, (int32_t)charsLength);
|
||
|
|
* -> Vector of bytes
|
||
|
|
* 42 63 64 3f [4]
|
||
|
|
* vector of chars
|
||
|
|
* "Bcd?"[4]
|
||
|
|
*
|
||
|
|
* UTraceDataFunc(context, fnNumber, level,
|
||
|
|
* "An int32_t %d and a whole bunch of them %vd",
|
||
|
|
* (int32_t)-5, (const int32_t *)ints, (int32_t)intsLength);
|
||
|
|
* -> An int32_t 0xfffffffb and a whole bunch of them
|
||
|
|
* fffffffb 00000005 0000010a [3]
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Trace output Formatter. An application's UTraceData tracing functions may call
|
||
|
|
* back to this function to format the trace output in a
|
||
|
|
* human readable form. Note that a UTraceData function may choose
|
||
|
|
* to not format the data; it could, for example, save it in
|
||
|
|
* in the raw form it was received (more compact), leaving
|
||
|
|
* formatting for a later trace analysis tool.
|
||
|
|
* @param outBuf pointer to a buffer to receive the formatted output. Output
|
||
|
|
* will be nul terminated if there is space in the buffer -
|
||
|
|
* if the length of the requested output < the output buffer size.
|
||
|
|
* @param capacity Length of the output buffer.
|
||
|
|
* @param indent Number of spaces to indent the output. Intended to allow
|
||
|
|
* data displayed from nested functions to be indented for readability.
|
||
|
|
* @param fmt Format specification for the data to output
|
||
|
|
* @param args Data to be formatted.
|
||
|
|
* @return Length of formatted output, including the terminating NUL.
|
||
|
|
* If buffer capacity is insufficient, the required capacity is returned.
|
||
|
|
* @stable ICU 2.8
|
||
|
|
*/
|
||
|
|
U_CAPI int32_t U_EXPORT2
|
||
|
|
utrace_vformat(char *outBuf, int32_t capacity,
|
||
|
|
int32_t indent, const char *fmt, va_list args);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Trace output Formatter. An application's UTraceData tracing functions may call
|
||
|
|
* this function to format any additional trace data, beyond that
|
||
|
|
* provided by default, in human readable form with the same
|
||
|
|
* formatting conventions used by utrace_vformat().
|
||
|
|
* @param outBuf pointer to a buffer to receive the formatted output. Output
|
||
|
|
* will be nul terminated if there is space in the buffer -
|
||
|
|
* if the length of the requested output < the output buffer size.
|
||
|
|
* @param capacity Length of the output buffer.
|
||
|
|
* @param indent Number of spaces to indent the output. Intended to allow
|
||
|
|
* data displayed from nested functions to be indented for readability.
|
||
|
|
* @param fmt Format specification for the data to output
|
||
|
|
* @param ... Data to be formatted.
|
||
|
|
* @return Length of formatted output, including the terminating NUL.
|
||
|
|
* If buffer capacity is insufficient, the required capacity is returned.
|
||
|
|
* @stable ICU 2.8
|
||
|
|
*/
|
||
|
|
U_CAPI int32_t U_EXPORT2
|
||
|
|
utrace_format(char *outBuf, int32_t capacity,
|
||
|
|
int32_t indent, const char *fmt, ...);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* Trace function numbers --------------------------------------------------- */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the name of a function from its trace function number.
|
||
|
|
*
|
||
|
|
* @param fnNumber The trace number for an ICU function.
|
||
|
|
* @return The name string for the function.
|
||
|
|
*
|
||
|
|
* @see UTraceFunctionNumber
|
||
|
|
* @stable ICU 2.8
|
||
|
|
*/
|
||
|
|
U_CAPI const char * U_EXPORT2
|
||
|
|
utrace_functionName(int32_t fnNumber);
|
||
|
|
|
||
|
|
U_CDECL_END
|
||
|
|
|
||
|
|
#endif
|