aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/icu/common/utrace.cpp
blob: 1f536d5643dfc512e11b2f6d7f86f2c994257fe3 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*   Copyright (C) 2003-2014, International Business Machines
*   Corporation and others.  All Rights Reserved.
*******************************************************************************
*   file name:  utrace.c
*   encoding:   UTF-8
*   tab size:   8 (not used)
*   indentation:4
*/

#include "unicode/utrace.h"
#include "utracimp.h"
#include "cstring.h"
#include "uassert.h"
#include "ucln_cmn.h"


static UTraceEntry     *pTraceEntryFunc = nullptr;
static UTraceExit      *pTraceExitFunc  = nullptr;
static UTraceData      *pTraceDataFunc  = nullptr;
static const void      *gTraceContext   = nullptr;

/**
 * \var utrace_level
 * Trace level variable. Negative for "off".
 */
static int32_t
utrace_level = UTRACE_ERROR;

U_CAPI void U_EXPORT2
utrace_entry(int32_t fnNumber) {
    if (pTraceEntryFunc != nullptr) {
        (*pTraceEntryFunc)(gTraceContext, fnNumber);
    }
}


static const char gExitFmt[]             = "Returns.";
static const char gExitFmtValue[]        = "Returns %d.";
static const char gExitFmtStatus[]       = "Returns.  Status = %d.";
static const char gExitFmtValueStatus[]  = "Returns %d.  Status = %d.";
static const char gExitFmtPtrStatus[]    = "Returns %d.  Status = %p.";

U_CAPI void U_EXPORT2
utrace_exit(int32_t fnNumber, int32_t returnType, ...) {
    if (pTraceExitFunc != nullptr) {
        va_list     args;
        const char *fmt;

        switch (returnType) {
        case 0:
            fmt = gExitFmt;
            break;
        case UTRACE_EXITV_I32:
            fmt = gExitFmtValue;
            break;
        case UTRACE_EXITV_STATUS:
            fmt = gExitFmtStatus;
            break;
        case UTRACE_EXITV_I32 | UTRACE_EXITV_STATUS:
            fmt = gExitFmtValueStatus;
            break;
        case UTRACE_EXITV_PTR | UTRACE_EXITV_STATUS:
            fmt = gExitFmtPtrStatus;
            break;
        default:
            UPRV_UNREACHABLE_EXIT;
        }

        va_start(args, returnType);
        (*pTraceExitFunc)(gTraceContext, fnNumber, fmt, args);
        va_end(args);
    }
}
 

 
U_CAPI void U_EXPORT2 
utrace_data(int32_t fnNumber, int32_t level, const char *fmt, ...) {
    if (pTraceDataFunc != nullptr) {
           va_list args;
           va_start(args, fmt ); 
           (*pTraceDataFunc)(gTraceContext, fnNumber, level, fmt, args);
           va_end(args);
    }
}


static void outputChar(char c, char *outBuf, int32_t *outIx, int32_t capacity, int32_t indent) {
    int32_t i;
    /* Check whether a start of line indenting is needed.  Three cases:
     *   1.  At the start of the first line  (output index == 0).
     *   2.  At the start of subsequent lines  (preceding char in buffer == '\n')
     *   3.  When preflighting buffer len (buffer capacity is exceeded), when
     *       a \n is output.  Ideally we wouldn't do the indent until the following char
     *       is received, but that won't work because there's no place to remember that
     *       the preceding char was \n.  Meaning that we may overstimate the
     *       buffer size needed.  No harm done.
     */
    if (*outIx==0 ||   /* case 1. */
        (c!='\n' && c!=0 && *outIx < capacity && outBuf[(*outIx)-1]=='\n') ||  /* case 2. */
        (c=='\n' && *outIx>=capacity))    /* case 3 */
    {
        /* At the start of a line.  Indent. */
        for(i=0; i<indent; i++) {
            if (*outIx < capacity) {
                outBuf[*outIx] = ' ';
            }
            (*outIx)++;
        }
    }

    if (*outIx < capacity) {
        outBuf[*outIx] = c;
    }
    if (c != 0) {
        /* NULs only appear as end-of-string terminators.  Move them to the output
         *  buffer, but do not update the length of the buffer, so that any
         *  following output will overwrite the NUL. */
        (*outIx)++;
    }
}

static void outputHexBytes(int64_t val, int32_t charsToOutput,
                           char *outBuf, int32_t *outIx, int32_t capacity) {
    static const char gHexChars[] = "0123456789abcdef";
    int32_t shiftCount;
    for  (shiftCount=(charsToOutput-1)*4; shiftCount >= 0; shiftCount-=4) {
        char c = gHexChars[(val >> shiftCount) & 0xf];
        outputChar(c, outBuf, outIx, capacity, 0);
    }
}

/* Output a pointer value in hex.  Work with any size of pointer   */
static void outputPtrBytes(void *val, char *outBuf, int32_t *outIx, int32_t capacity) {
    uint32_t  i;
    int32_t  incVal = 1;              /* +1 for big endian, -1 for little endian          */
    char     *p     = (char *)&val;   /* point to current byte to output in the ptr val  */

#if !U_IS_BIG_ENDIAN
    /* Little Endian.  Move p to most significant end of the value      */
    incVal = -1;
    p += sizeof(void *) - 1;
#endif

    /* Loop through the bytes of the ptr as it sits in memory, from 
     * most significant to least significant end                    */
    for (i=0; i<sizeof(void *); i++) {
        outputHexBytes(*p, 2, outBuf, outIx, capacity);
        p += incVal;
    }
}

static void outputString(const char *s, char *outBuf, int32_t *outIx, int32_t capacity, int32_t indent) {
    int32_t i = 0;
    char    c;
    if (s==nullptr) {
        s = "*NULL*";
    }
    do {
        c = s[i++];
        outputChar(c, outBuf, outIx, capacity, indent);
    } while (c != 0);
}
        


static void outputUString(const char16_t *s, int32_t len,
                          char *outBuf, int32_t *outIx, int32_t capacity, int32_t indent) {
    int32_t i = 0;
    char16_t   c;
    if (s==nullptr) {
        outputString(nullptr, outBuf, outIx, capacity, indent);
        return;
    }

    for (i=0; i<len || len==-1; i++) {
        c = s[i];
        outputHexBytes(c, 4, outBuf, outIx, capacity);
        outputChar(' ', outBuf, outIx, capacity, indent);
        if (len == -1 && c==0) {
            break;
        }
    }
}
        
U_CAPI int32_t U_EXPORT2
utrace_vformat(char *outBuf, int32_t capacity, int32_t indent, const char *fmt, va_list args) {
    int32_t   outIx  = 0;
    int32_t   fmtIx  = 0;
    char      fmtC;
    char      c;
    int32_t   intArg;
    int64_t   longArg = 0;
    char      *ptrArg;

    /*   Loop runs once for each character in the format string.
     */
    for (;;) {
        fmtC = fmt[fmtIx++];
        if (fmtC != '%') {
            /* Literal character, not part of a %sequence.  Just copy it to the output. */
            outputChar(fmtC, outBuf, &outIx, capacity, indent);
            if (fmtC == 0) {
                /* We hit the NUL that terminates the format string.
                 * This is the normal (and only) exit from the loop that
                 * interprets the format
                 */
                break;
            }
            continue;
        }

        /* We encountered a '%'.  Pick up the following format char */
        fmtC = fmt[fmtIx++];

        switch (fmtC) {
        case 'c':
            /* single 8 bit char   */
            c = (char)va_arg(args, int32_t);
            outputChar(c, outBuf, &outIx, capacity, indent);
            break;

        case 's':
            /* char * string, NUL terminated.  */
            ptrArg = va_arg(args, char *);
            outputString((const char *)ptrArg, outBuf, &outIx, capacity, indent);
            break;

        case 'S':
            /* char16_t * string, with length, len==-1 for NUL terminated. */
            ptrArg = va_arg(args, char *);             /* Ptr    */
            intArg =(int32_t)va_arg(args, int32_t);    /* Length */
            outputUString((const char16_t *)ptrArg, intArg, outBuf, &outIx, capacity, indent);
            break;

        case 'b':
            /*  8 bit int  */
            intArg = va_arg(args, int);
            outputHexBytes(intArg, 2, outBuf, &outIx, capacity);
            break;

        case 'h':
            /*  16 bit int  */
            intArg = va_arg(args, int);
            outputHexBytes(intArg, 4, outBuf, &outIx, capacity);
            break;

        case 'd':
            /*  32 bit int  */
            intArg = va_arg(args, int);
            outputHexBytes(intArg, 8, outBuf, &outIx, capacity);
            break;

        case 'l':
            /*  64 bit long  */
            longArg = va_arg(args, int64_t);
            outputHexBytes(longArg, 16, outBuf, &outIx, capacity);
            break;
            
        case 'p':
            /*  Pointers.   */
            ptrArg = va_arg(args, char *);
            outputPtrBytes(ptrArg, outBuf, &outIx, capacity);
            break;

        case 0:
            /* Single '%' at end of fmt string.  Output as literal '%'.   
             * Back up index into format string so that the terminating NUL will be
             * re-fetched in the outer loop, causing it to terminate.
             */
            outputChar('%', outBuf, &outIx, capacity, indent);
            fmtIx--;
            break;

        case 'v':
            {
                /* Vector of values, e.g. %vh */
                char     vectorType;
                int32_t  vectorLen;
                const char   *i8Ptr;
                int16_t  *i16Ptr;
                int32_t  *i32Ptr;
                int64_t  *i64Ptr;
                void     **ptrPtr;
                int32_t   charsToOutput = 0;
                int32_t   i;
                
                vectorType = fmt[fmtIx];    /* b, h, d, l, p, etc. */
                if (vectorType != 0) {
                    fmtIx++;
                }
                i8Ptr = (const char *)va_arg(args, void*);
                i16Ptr = (int16_t *)i8Ptr;
                i32Ptr = (int32_t *)i8Ptr;
                i64Ptr = (int64_t *)i8Ptr;
                ptrPtr = (void **)i8Ptr;
                vectorLen =(int32_t)va_arg(args, int32_t);
                if (ptrPtr == nullptr) {
                    outputString("*NULL* ", outBuf, &outIx, capacity, indent);
                } else {
                    for (i=0; i<vectorLen || vectorLen==-1; i++) { 
                        switch (vectorType) {
                        case 'b':
                            charsToOutput = 2;
                            longArg = *i8Ptr++;
                            break;
                        case 'h':
                            charsToOutput = 4;
                            longArg = *i16Ptr++;
                            break;
                        case 'd':
                            charsToOutput = 8;
                            longArg = *i32Ptr++;
                            break;
                        case 'l':
                            charsToOutput = 16;
                            longArg = *i64Ptr++;
                            break;
                        case 'p':
                            charsToOutput = 0;
                            outputPtrBytes(*ptrPtr, outBuf, &outIx, capacity);
                            longArg = *ptrPtr==nullptr? 0: 1;    /* test for nullptr terminated array. */
                            ptrPtr++;
                            break;
                        case 'c':
                            charsToOutput = 0;
                            outputChar(*i8Ptr, outBuf, &outIx, capacity, indent);
                            longArg = *i8Ptr;    /* for test for nullptr terminated array. */
                            i8Ptr++;
                            break;
                        case 's':
                            charsToOutput = 0;
                            outputString((const char *)*ptrPtr, outBuf, &outIx, capacity, indent);
                            outputChar('\n', outBuf, &outIx, capacity, indent);
                            longArg = *ptrPtr==nullptr? 0: 1;   /* for test for nullptr term. array. */
                            ptrPtr++;
                            break;

                        case 'S':
                            charsToOutput = 0;
                            outputUString((const char16_t *)*ptrPtr, -1, outBuf, &outIx, capacity, indent);
                            outputChar('\n', outBuf, &outIx, capacity, indent);
                            longArg = *ptrPtr==nullptr? 0: 1;   /* for test for nullptr term. array. */
                            ptrPtr++;
                            break;

                            
                        }
                        if (charsToOutput > 0) {
                            outputHexBytes(longArg, charsToOutput, outBuf, &outIx, capacity);
                            outputChar(' ', outBuf, &outIx, capacity, indent);
                        }
                        if (vectorLen == -1 && longArg == 0) {
                            break;
                        }
                    }
                }
                outputChar('[', outBuf, &outIx, capacity, indent);
                outputHexBytes(vectorLen, 8, outBuf, &outIx, capacity);
                outputChar(']', outBuf, &outIx, capacity, indent);
            }
            break;


        default:
            /* %. in format string, where . is some character not in the set
             *    of recognized format chars.  Just output it as if % wasn't there.
             *    (Covers "%%" outputting a single '%')
             */
             outputChar(fmtC, outBuf, &outIx, capacity, indent);
        }
    }
    outputChar(0, outBuf, &outIx, capacity, indent);  /* Make sure that output is NUL terminated   */
    return outIx + 1;     /* outIx + 1 because outIx does not increment when outputting final NUL. */
}




U_CAPI int32_t U_EXPORT2
utrace_format(char *outBuf, int32_t capacity,
                int32_t indent, const char *fmt,  ...) {
    int32_t retVal;
    va_list args;
    va_start(args, fmt ); 
    retVal = utrace_vformat(outBuf, capacity, indent, fmt, args);
    va_end(args);
    return retVal;
}


U_CAPI void U_EXPORT2
utrace_setFunctions(const void *context,
                    UTraceEntry *e, UTraceExit *x, UTraceData *d) {
    pTraceEntryFunc = e;
    pTraceExitFunc  = x;
    pTraceDataFunc  = d;
    gTraceContext   = context;
}


U_CAPI void U_EXPORT2
utrace_getFunctions(const void **context,
                    UTraceEntry **e, UTraceExit **x, UTraceData **d) {
    *e = pTraceEntryFunc;
    *x = pTraceExitFunc;
    *d = pTraceDataFunc;
    *context = gTraceContext;
}

U_CAPI void U_EXPORT2
utrace_setLevel(int32_t level) {
    if (level < UTRACE_OFF) {
        level = UTRACE_OFF;
    }
    if (level > UTRACE_VERBOSE) {
        level = UTRACE_VERBOSE;
    }
    utrace_level = level;
}

U_CAPI int32_t U_EXPORT2
utrace_getLevel() {
    return utrace_level;
}


U_CFUNC UBool 
utrace_cleanup() {
    pTraceEntryFunc = nullptr;
    pTraceExitFunc  = nullptr;
    pTraceDataFunc  = nullptr;
    utrace_level    = UTRACE_OFF;
    gTraceContext   = nullptr;
    return true;
}


static const char * const
trFnName[] = {
    "u_init",
    "u_cleanup",
    nullptr
};


static const char * const
trConvNames[] = {
    "ucnv_open",
    "ucnv_openPackage",
    "ucnv_openAlgorithmic",
    "ucnv_clone",
    "ucnv_close",
    "ucnv_flushCache",
    "ucnv_load",
    "ucnv_unload",
    nullptr
};

    
static const char * const
trCollNames[] = {
    "ucol_open",
    "ucol_close",
    "ucol_strcoll",
    "ucol_getSortKey",
    "ucol_getLocale",
    "ucol_nextSortKeyPart",
    "ucol_strcollIter",
    "ucol_openFromShortString",
    "ucol_strcollUTF8",
    nullptr
};


static const char* const
trResDataNames[] = {
    "resc",
    "bundle-open",
    "file-open",
    "res-open",
    nullptr
};

                
U_CAPI const char * U_EXPORT2
utrace_functionName(int32_t fnNumber) {
    if(UTRACE_FUNCTION_START <= fnNumber && fnNumber < UTRACE_FUNCTION_LIMIT) {
        return trFnName[fnNumber];
    } else if(UTRACE_CONVERSION_START <= fnNumber && fnNumber < UTRACE_CONVERSION_LIMIT) {
        return trConvNames[fnNumber - UTRACE_CONVERSION_START];
    } else if(UTRACE_COLLATION_START <= fnNumber && fnNumber < UTRACE_COLLATION_LIMIT){
        return trCollNames[fnNumber - UTRACE_COLLATION_START];
    } else if(UTRACE_UDATA_START <= fnNumber && fnNumber < UTRACE_RES_DATA_LIMIT){
        return trResDataNames[fnNumber - UTRACE_UDATA_START];
    } else {
        return "[BOGUS Trace Function Number]";
    }
}