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utrace.h
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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 *******************************************************************************
5 *
6 * Copyright (C) 2003-2013, International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 *******************************************************************************
10 * file name: utrace.h
11 * encoding: UTF-8
12 * tab size: 8 (not used)
13 * indentation:4
14 *
15 * created on: 2003aug06
16 * created by: Markus W. Scherer
17 *
18 * Definitions for ICU tracing/logging.
19 *
20 */
21
22 #ifndef __UTRACE_H__
23 #define __UTRACE_H__
24
25 #include <stdarg.h>
26 #include "unicode/utypes.h"
27
39 U_CDECL_BEGIN
40
46 typedef enum UTraceLevel {
48 UTRACE_OFF=-1,
50 UTRACE_ERROR=0,
52 UTRACE_WARNING=3,
54 UTRACE_OPEN_CLOSE=5,
56 UTRACE_INFO=7,
58 UTRACE_VERBOSE=9
59 } UTraceLevel;
60
65 typedef enum UTraceFunctionNumber {
66 UTRACE_FUNCTION_START=0,
67 UTRACE_U_INIT=UTRACE_FUNCTION_START,
68 UTRACE_U_CLEANUP,
69 #ifndef U_HIDE_DEPRECATED_API
70
74 UTRACE_FUNCTION_LIMIT,
75 #endif // U_HIDE_DEPRECATED_API
76
77 UTRACE_CONVERSION_START=0x1000,
78 UTRACE_UCNV_OPEN=UTRACE_CONVERSION_START,
79 UTRACE_UCNV_OPEN_PACKAGE,
80 UTRACE_UCNV_OPEN_ALGORITHMIC,
81 UTRACE_UCNV_CLONE,
82 UTRACE_UCNV_CLOSE,
83 UTRACE_UCNV_FLUSH_CACHE,
84 UTRACE_UCNV_LOAD,
85 UTRACE_UCNV_UNLOAD,
86 #ifndef U_HIDE_DEPRECATED_API
87
91 UTRACE_CONVERSION_LIMIT,
92 #endif // U_HIDE_DEPRECATED_API
93
94 UTRACE_COLLATION_START=0x2000,
95 UTRACE_UCOL_OPEN=UTRACE_COLLATION_START,
96 UTRACE_UCOL_CLOSE,
97 UTRACE_UCOL_STRCOLL,
98 UTRACE_UCOL_GET_SORTKEY,
99 UTRACE_UCOL_GETLOCALE,
100 UTRACE_UCOL_NEXTSORTKEYPART,
101 UTRACE_UCOL_STRCOLLITER,
102 UTRACE_UCOL_OPEN_FROM_SHORT_STRING,
103 UTRACE_UCOL_STRCOLLUTF8,
104 #ifndef U_HIDE_DEPRECATED_API
105
109 UTRACE_COLLATION_LIMIT
110 #endif // U_HIDE_DEPRECATED_API
111 } UTraceFunctionNumber;
112
118 U_STABLE void U_EXPORT2
119 utrace_setLevel(int32_t traceLevel);
120
126 U_STABLE int32_t U_EXPORT2
127 utrace_getLevel(void);
128
129 /* Trace function pointers types ----------------------------- */
130
137 typedef void U_CALLCONV
138 UTraceEntry(const void *context, int32_t fnNumber);
139
153 typedef void U_CALLCONV
154 UTraceExit(const void *context, int32_t fnNumber,
155 const char *fmt, va_list args);
156
168 typedef void U_CALLCONV
169 UTraceData(const void *context, int32_t fnNumber, int32_t level,
170 const char *fmt, va_list args);
171
200 U_STABLE void U_EXPORT2
201 utrace_setFunctions(const void *context,
202 UTraceEntry *e, UTraceExit *x, UTraceData *d);
203
214 U_STABLE void U_EXPORT2
215 utrace_getFunctions(const void **context,
216 UTraceEntry **e, UTraceExit **x, UTraceData **d);
217
218
219
220 /*
221 *
222 * ICU trace format string syntax
223 *
224 * Format Strings are passed to UTraceData functions, and define the
225 * number and types of the trace data being passed on each call.
226 *
227 * The UTraceData function, which is supplied by the application,
228 * not by ICU, can either forward the trace data (passed via
229 * varargs) and the format string back to ICU for formatting into
230 * a displayable string, or it can interpret the format itself,
231 * and do as it wishes with the trace data.
232 *
233 *
234 * Goals for the format string
235 * - basic data output
236 * - easy to use for trace programmer
237 * - sufficient provision for data types for trace output readability
238 * - well-defined types and binary portable APIs
239 *
240 * Non-goals
241 * - printf compatibility
242 * - fancy formatting
243 * - argument reordering and other internationalization features
244 *
245 * ICU trace format strings contain plain text with argument inserts,
246 * much like standard printf format strings.
247 * Each insert begins with a '%', then optionally contains a 'v',
248 * then exactly one type character.
249 * Two '%' in a row represent a '%' instead of an insert.
250 * The trace format strings need not have \n at the end.
251 *
252 *
253 * Types
254 * -----
255 *
256 * Type characters:
257 * - c A char character in the default codepage.
258 * - s A NUL-terminated char * string in the default codepage.
259 * - S A UChar * string. Requires two params, (ptr, length). Length=-1 for nul term.
260 * - b A byte (8-bit integer).
261 * - h A 16-bit integer. Also a 16 bit Unicode code unit.
262 * - d A 32-bit integer. Also a 20 bit Unicode code point value.
263 * - l A 64-bit integer.
264 * - p A data pointer.
265 *
266 * Vectors
267 * -------
268 *
269 * If the 'v' is not specified, then one item of the specified type
270 * is passed in.
271 * If the 'v' (for "vector") is specified, then a vector of items of the
272 * specified type is passed in, via a pointer to the first item
273 * and an int32_t value for the length of the vector.
274 * Length==-1 means zero or NUL termination. Works for vectors of all types.
275 *
276 * Note: %vS is a vector of (UChar *) strings. The strings must
277 * be nul terminated as there is no way to provide a
278 * separate length parameter for each string. The length
279 * parameter (required for all vectors) is the number of
280 * strings, not the length of the strings.
281 *
282 * Examples
283 * --------
284 *
285 * These examples show the parameters that will be passed to an application's
286 * UTraceData() function for various formats.
287 *
288 * - the precise formatting is up to the application!
289 * - the examples use type casts for arguments only to _show_ the types of
290 * arguments without needing variable declarations in the examples;
291 * the type casts will not be necessary in actual code
292 *
293 * UTraceDataFunc(context, fnNumber, level,
294 * "There is a character %c in the string %s.", // Format String
295 * (char)c, (const char *)s); // varargs parameters
296 * -> There is a character 0x42 'B' in the string "Bravo".
297 *
298 * UTraceDataFunc(context, fnNumber, level,
299 * "Vector of bytes %vb vector of chars %vc",
300 * (const uint8_t *)bytes, (int32_t)bytesLength,
301 * (const char *)chars, (int32_t)charsLength);
302 * -> Vector of bytes
303 * 42 63 64 3f [4]
304 * vector of chars
305 * "Bcd?"[4]
306 *
307 * UTraceDataFunc(context, fnNumber, level,
308 * "An int32_t %d and a whole bunch of them %vd",
309 * (int32_t)-5, (const int32_t *)ints, (int32_t)intsLength);
310 * -> An int32_t 0xfffffffb and a whole bunch of them
311 * fffffffb 00000005 0000010a [3]
312 *
313 */
314
315
316
336 U_STABLE int32_t U_EXPORT2
337 utrace_vformat(char *outBuf, int32_t capacity,
338 int32_t indent, const char *fmt, va_list args);
339
357 U_STABLE int32_t U_EXPORT2
358 utrace_format(char *outBuf, int32_t capacity,
359 int32_t indent, const char *fmt, ...);
360
361
362
363 /* Trace function numbers --------------------------------------------------- */
364
374 U_STABLE const char * U_EXPORT2
375 utrace_functionName(int32_t fnNumber);
376
377 U_CDECL_END
378
379 #endif
UTraceLevel
UTraceLevel
Trace severity levels.
Definition: utrace.h:46
UTRACE_UCOL_STRCOLLUTF8
Definition: utrace.h:103
UTRACE_FUNCTION_LIMIT
One more than the highest normal collation trace location.
Definition: utrace.h:74
UTRACE_VERBOSE
Trace the maximum number of ICU operations.
Definition: utrace.h:58
UTraceEntry
void UTraceEntry(const void *context, int32_t fnNumber)
Type signature for the trace function to be called when entering a function.
Definition: utrace.h:138
U_CALLCONV
#define U_CALLCONV
Similar to U_CDECL_BEGIN/U_CDECL_END, this qualifier is necessary in callback function typedefs to ma...
Definition: platform.h:848
UTraceExit
void UTraceExit(const void *context, int32_t fnNumber, const char *fmt, va_list args)
Type signature for the trace function to be called when exiting from a function.
Definition: utrace.h:154
utrace_getLevel
int32_t utrace_getLevel(void)
Getter for the trace level.
UTRACE_ERROR
Trace error conditions only.
Definition: utrace.h:50
U_CDECL_BEGIN
#define U_CDECL_BEGIN
This is used to begin a declaration of a library private ICU C API.
Definition: umachine.h:84
UTRACE_INFO
Trace an intermediate number of ICU operations.
Definition: utrace.h:56
UTRACE_COLLATION_LIMIT
One more than the highest normal collation trace location.
Definition: utrace.h:109
UTraceData
void UTraceData(const void *context, int32_t fnNumber, int32_t level, const char *fmt, va_list args)
Type signature for the trace function to be called from within an ICU function to display data or mes...
Definition: utrace.h:169
utrace_setLevel
void utrace_setLevel(int32_t traceLevel)
Setter for the trace level.
UTRACE_CONVERSION_LIMIT
One more than the highest normal collation trace location.
Definition: utrace.h:91
utrace_functionName
const char * utrace_functionName(int32_t fnNumber)
Get the name of a function from its trace function number.
UTRACE_WARNING
Trace errors and warnings.
Definition: utrace.h:52
utrace_setFunctions
void utrace_setFunctions(const void *context, UTraceEntry *e, UTraceExit *x, UTraceData *d)
Set ICU Tracing functions.
utrace_format
int32_t utrace_format(char *outBuf, int32_t capacity, int32_t indent, const char *fmt,...)
Trace output Formatter.
UTraceFunctionNumber
UTraceFunctionNumber
These are the ICU functions that will be traced when tracing is enabled.
Definition: utrace.h:65
U_CDECL_END
#define U_CDECL_END
This is used to end a declaration of a library private ICU C API.
Definition: umachine.h:85
UTRACE_OFF
Disable all tracing.
Definition: utrace.h:48
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
UTRACE_OPEN_CLOSE
Trace opens and closes of ICU services.
Definition: utrace.h:54
utrace_vformat
int32_t utrace_vformat(char *outBuf, int32_t capacity, int32_t indent, const char *fmt, va_list args)
Trace output Formatter.
U_STABLE
#define U_STABLE
This is used to declare a function as a stable public ICU C API.
Definition: umachine.h:111
utrace_getFunctions
void utrace_getFunctions(const void **context, UTraceEntry **e, UTraceExit **x, UTraceData **d)
Get the currently installed ICU tracing functions.