logprint.c revision abb9638e3696e393d6dc45439feda91073e52103 
1/* //device/libs/cutils/logprint.c
2**
3** Copyright 2006, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define _GNU_SOURCE /* for asprintf */
19
20#include <ctype.h>
21#include <stdio.h>
22#include <errno.h>
23#include <stdlib.h>
24#include <stdint.h>
25#include <string.h>
26#include <assert.h>
27#include <arpa/inet.h>
28
29#include <cutils/logd.h>
30#include <cutils/logprint.h>
31
32typedef struct FilterInfo_t {
33    char *mTag;
34    android_LogPriority mPri;
35    struct FilterInfo_t *p_next;
36} FilterInfo;
37
38struct AndroidLogFormat_t {
39    android_LogPriority global_pri;
40    FilterInfo *filters;
41    AndroidLogPrintFormat format;
42};
43
44static FilterInfo * filterinfo_new(const char * tag, android_LogPriority pri)
45{
46    FilterInfo *p_ret;
47
48    p_ret = (FilterInfo *)calloc(1, sizeof(FilterInfo));
49    p_ret->mTag = strdup(tag);
50    p_ret->mPri = pri;
51
52    return p_ret;
53}
54
55static void filterinfo_free(FilterInfo *p_info)
56{
57    if (p_info == NULL) {
58        return;
59    }
60
61    free(p_info->mTag);
62    p_info->mTag = NULL;
63}
64
65/*
66 * Note: also accepts 0-9 priorities
67 * returns ANDROID_LOG_UNKNOWN if the character is unrecognized
68 */
69static android_LogPriority filterCharToPri (char c)
70{
71    android_LogPriority pri;
72
73    c = tolower(c);
74
75    if (c >= '0' && c <= '9') {
76        if (c >= ('0'+ANDROID_LOG_SILENT)) {
77            pri = ANDROID_LOG_VERBOSE;
78        } else {
79            pri = (android_LogPriority)(c - '0');
80        }
81    } else if (c == 'v') {
82        pri = ANDROID_LOG_VERBOSE;
83    } else if (c == 'd') {
84        pri = ANDROID_LOG_DEBUG;
85    } else if (c == 'i') {
86        pri = ANDROID_LOG_INFO;
87    } else if (c == 'w') {
88        pri = ANDROID_LOG_WARN;
89    } else if (c == 'e') {
90        pri = ANDROID_LOG_ERROR;
91    } else if (c == 'f') {
92        pri = ANDROID_LOG_FATAL;
93    } else if (c == 's') {
94        pri = ANDROID_LOG_SILENT;
95    } else if (c == '*') {
96        pri = ANDROID_LOG_DEFAULT;
97    } else {
98        pri = ANDROID_LOG_UNKNOWN;
99    }
100
101    return pri;
102}
103
104static char filterPriToChar (android_LogPriority pri)
105{
106    switch (pri) {
107        case ANDROID_LOG_VERBOSE:       return 'V';
108        case ANDROID_LOG_DEBUG:         return 'D';
109        case ANDROID_LOG_INFO:          return 'I';
110        case ANDROID_LOG_WARN:          return 'W';
111        case ANDROID_LOG_ERROR:         return 'E';
112        case ANDROID_LOG_FATAL:         return 'F';
113        case ANDROID_LOG_SILENT:        return 'S';
114
115        case ANDROID_LOG_DEFAULT:
116        case ANDROID_LOG_UNKNOWN:
117        default:                        return '?';
118    }
119}
120
121static android_LogPriority filterPriForTag(
122        AndroidLogFormat *p_format, const char *tag)
123{
124    FilterInfo *p_curFilter;
125
126    for (p_curFilter = p_format->filters
127            ; p_curFilter != NULL
128            ; p_curFilter = p_curFilter->p_next
129    ) {
130        if (0 == strcmp(tag, p_curFilter->mTag)) {
131            if (p_curFilter->mPri == ANDROID_LOG_DEFAULT) {
132                return p_format->global_pri;
133            } else {
134                return p_curFilter->mPri;
135            }
136        }
137    }
138
139    return p_format->global_pri;
140}
141
142/** for debugging */
143static void dumpFilters(AndroidLogFormat *p_format)
144{
145    FilterInfo *p_fi;
146
147    for (p_fi = p_format->filters ; p_fi != NULL ; p_fi = p_fi->p_next) {
148        char cPri = filterPriToChar(p_fi->mPri);
149        if (p_fi->mPri == ANDROID_LOG_DEFAULT) {
150            cPri = filterPriToChar(p_format->global_pri);
151        }
152        fprintf(stderr,"%s:%c\n", p_fi->mTag, cPri);
153    }
154
155    fprintf(stderr,"*:%c\n", filterPriToChar(p_format->global_pri));
156
157}
158
159/**
160 * returns 1 if this log line should be printed based on its priority
161 * and tag, and 0 if it should not
162 */
163int android_log_shouldPrintLine (
164        AndroidLogFormat *p_format, const char *tag, android_LogPriority pri)
165{
166    return pri >= filterPriForTag(p_format, tag);
167}
168
169AndroidLogFormat *android_log_format_new()
170{
171    AndroidLogFormat *p_ret;
172
173    p_ret = calloc(1, sizeof(AndroidLogFormat));
174
175    p_ret->global_pri = ANDROID_LOG_VERBOSE;
176    p_ret->format = FORMAT_BRIEF;
177
178    return p_ret;
179}
180
181void android_log_format_free(AndroidLogFormat *p_format)
182{
183    FilterInfo *p_info, *p_info_old;
184
185    p_info = p_format->filters;
186
187    while (p_info != NULL) {
188        p_info_old = p_info;
189        p_info = p_info->p_next;
190
191        free(p_info_old);
192    }
193
194    free(p_format);
195}
196
197
198
199void android_log_setPrintFormat(AndroidLogFormat *p_format,
200        AndroidLogPrintFormat format)
201{
202    p_format->format=format;
203}
204
205/**
206 * Returns FORMAT_OFF on invalid string
207 */
208AndroidLogPrintFormat android_log_formatFromString(const char * formatString)
209{
210    static AndroidLogPrintFormat format;
211
212    if (strcmp(formatString, "brief") == 0) format = FORMAT_BRIEF;
213    else if (strcmp(formatString, "process") == 0) format = FORMAT_PROCESS;
214    else if (strcmp(formatString, "tag") == 0) format = FORMAT_TAG;
215    else if (strcmp(formatString, "thread") == 0) format = FORMAT_THREAD;
216    else if (strcmp(formatString, "raw") == 0) format = FORMAT_RAW;
217    else if (strcmp(formatString, "time") == 0) format = FORMAT_TIME;
218    else if (strcmp(formatString, "threadtime") == 0) format = FORMAT_THREADTIME;
219    else if (strcmp(formatString, "long") == 0) format = FORMAT_LONG;
220    else format = FORMAT_OFF;
221
222    return format;
223}
224
225/**
226 * filterExpression: a single filter expression
227 * eg "AT:d"
228 *
229 * returns 0 on success and -1 on invalid expression
230 *
231 * Assumes single threaded execution
232 */
233
234int android_log_addFilterRule(AndroidLogFormat *p_format,
235        const char *filterExpression)
236{
237    size_t i=0;
238    size_t tagNameLength;
239    android_LogPriority pri = ANDROID_LOG_DEFAULT;
240
241    tagNameLength = strcspn(filterExpression, ":");
242
243    if (tagNameLength == 0) {
244        goto error;
245    }
246
247    if(filterExpression[tagNameLength] == ':') {
248        pri = filterCharToPri(filterExpression[tagNameLength+1]);
249
250        if (pri == ANDROID_LOG_UNKNOWN) {
251            goto error;
252        }
253    }
254
255    if(0 == strncmp("*", filterExpression, tagNameLength)) {
256        // This filter expression refers to the global filter
257        // The default level for this is DEBUG if the priority
258        // is unspecified
259        if (pri == ANDROID_LOG_DEFAULT) {
260            pri = ANDROID_LOG_DEBUG;
261        }
262
263        p_format->global_pri = pri;
264    } else {
265        // for filter expressions that don't refer to the global
266        // filter, the default is verbose if the priority is unspecified
267        if (pri == ANDROID_LOG_DEFAULT) {
268            pri = ANDROID_LOG_VERBOSE;
269        }
270
271        char *tagName;
272
273// Presently HAVE_STRNDUP is never defined, so the second case is always taken
274// Darwin doesn't have strnup, everything else does
275#ifdef HAVE_STRNDUP
276        tagName = strndup(filterExpression, tagNameLength);
277#else
278        //a few extra bytes copied...
279        tagName = strdup(filterExpression);
280        tagName[tagNameLength] = '\0';
281#endif /*HAVE_STRNDUP*/
282
283        FilterInfo *p_fi = filterinfo_new(tagName, pri);
284        free(tagName);
285
286        p_fi->p_next = p_format->filters;
287        p_format->filters = p_fi;
288    }
289
290    return 0;
291error:
292    return -1;
293}
294
295
296/**
297 * filterString: a comma/whitespace-separated set of filter expressions
298 *
299 * eg "AT:d *:i"
300 *
301 * returns 0 on success and -1 on invalid expression
302 *
303 * Assumes single threaded execution
304 *
305 */
306
307int android_log_addFilterString(AndroidLogFormat *p_format,
308        const char *filterString)
309{
310    char *filterStringCopy = strdup (filterString);
311    char *p_cur = filterStringCopy;
312    char *p_ret;
313    int err;
314
315    // Yes, I'm using strsep
316    while (NULL != (p_ret = strsep(&p_cur, " \t,"))) {
317        // ignore whitespace-only entries
318        if(p_ret[0] != '\0') {
319            err = android_log_addFilterRule(p_format, p_ret);
320
321            if (err < 0) {
322                goto error;
323            }
324        }
325    }
326
327    free (filterStringCopy);
328    return 0;
329error:
330    free (filterStringCopy);
331    return -1;
332}
333
334static inline char * strip_end(char *str)
335{
336    char *end = str + strlen(str) - 1;
337
338    while (end >= str && isspace(*end))
339        *end-- = '\0';
340    return str;
341}
342
343/**
344 * Splits a wire-format buffer into an AndroidLogEntry
345 * entry allocated by caller. Pointers will point directly into buf
346 *
347 * Returns 0 on success and -1 on invalid wire format (entry will be
348 * in unspecified state)
349 */
350int android_log_processLogBuffer(struct logger_entry *buf,
351                                 AndroidLogEntry *entry)
352{
353    size_t tag_len;
354
355    entry->tv_sec = buf->sec;
356    entry->tv_nsec = buf->nsec;
357    entry->priority = buf->msg[0];
358    entry->pid = buf->pid;
359    entry->tid = buf->tid;
360    entry->tag = buf->msg + 1;
361    tag_len = strlen(entry->tag);
362    entry->messageLen = buf->len - tag_len - 3;
363    entry->message = entry->tag + tag_len + 1;
364
365    return 0;
366}
367
368/*
369 * Extract a 4-byte value from a byte stream.
370 */
371static inline uint32_t get4LE(const uint8_t* src)
372{
373    return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
374}
375
376/*
377 * Extract an 8-byte value from a byte stream.
378 */
379static inline uint64_t get8LE(const uint8_t* src)
380{
381    uint32_t low, high;
382
383    low = src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
384    high = src[4] | (src[5] << 8) | (src[6] << 16) | (src[7] << 24);
385    return ((long long) high << 32) | (long long) low;
386}
387
388
389/*
390 * Recursively convert binary log data to printable form.
391 *
392 * This needs to be recursive because you can have lists of lists.
393 *
394 * If we run out of room, we stop processing immediately.  It's important
395 * for us to check for space on every output element to avoid producing
396 * garbled output.
397 *
398 * Returns 0 on success, 1 on buffer full, -1 on failure.
399 */
400static int android_log_printBinaryEvent(const unsigned char** pEventData,
401    size_t* pEventDataLen, char** pOutBuf, size_t* pOutBufLen)
402{
403    const unsigned char* eventData = *pEventData;
404    size_t eventDataLen = *pEventDataLen;
405    char* outBuf = *pOutBuf;
406    size_t outBufLen = *pOutBufLen;
407    unsigned char type;
408    size_t outCount;
409    int result = 0;
410
411    if (eventDataLen < 1)
412        return -1;
413    type = *eventData++;
414    eventDataLen--;
415
416    //fprintf(stderr, "--- type=%d (rem len=%d)\n", type, eventDataLen);
417
418    switch (type) {
419    case EVENT_TYPE_INT:
420        /* 32-bit signed int */
421        {
422            int ival;
423
424            if (eventDataLen < 4)
425                return -1;
426            ival = get4LE(eventData);
427            eventData += 4;
428            eventDataLen -= 4;
429
430            outCount = snprintf(outBuf, outBufLen, "%d", ival);
431            if (outCount < outBufLen) {
432                outBuf += outCount;
433                outBufLen -= outCount;
434            } else {
435                /* halt output */
436                goto no_room;
437            }
438        }
439        break;
440    case EVENT_TYPE_LONG:
441        /* 64-bit signed long */
442        {
443            long long lval;
444
445            if (eventDataLen < 8)
446                return -1;
447            lval = get8LE(eventData);
448            eventData += 8;
449            eventDataLen -= 8;
450
451            outCount = snprintf(outBuf, outBufLen, "%lld", lval);
452            if (outCount < outBufLen) {
453                outBuf += outCount;
454                outBufLen -= outCount;
455            } else {
456                /* halt output */
457                goto no_room;
458            }
459        }
460        break;
461    case EVENT_TYPE_STRING:
462        /* UTF-8 chars, not NULL-terminated */
463        {
464            unsigned int strLen;
465
466            if (eventDataLen < 4)
467                return -1;
468            strLen = get4LE(eventData);
469            eventData += 4;
470            eventDataLen -= 4;
471
472            if (eventDataLen < strLen)
473                return -1;
474
475            if (strLen < outBufLen) {
476                memcpy(outBuf, eventData, strLen);
477                outBuf += strLen;
478                outBufLen -= strLen;
479            } else if (outBufLen > 0) {
480                /* copy what we can */
481                memcpy(outBuf, eventData, outBufLen);
482                outBuf += outBufLen;
483                outBufLen -= outBufLen;
484                goto no_room;
485            }
486            eventData += strLen;
487            eventDataLen -= strLen;
488            break;
489        }
490    case EVENT_TYPE_LIST:
491        /* N items, all different types */
492        {
493            unsigned char count;
494            int i;
495
496            if (eventDataLen < 1)
497                return -1;
498
499            count = *eventData++;
500            eventDataLen--;
501
502            if (outBufLen > 0) {
503                *outBuf++ = '[';
504                outBufLen--;
505            } else {
506                goto no_room;
507            }
508
509            for (i = 0; i < count; i++) {
510                result = android_log_printBinaryEvent(&eventData, &eventDataLen,
511                        &outBuf, &outBufLen);
512                if (result != 0)
513                    goto bail;
514
515                if (i < count-1) {
516                    if (outBufLen > 0) {
517                        *outBuf++ = ',';
518                        outBufLen--;
519                    } else {
520                        goto no_room;
521                    }
522                }
523            }
524
525            if (outBufLen > 0) {
526                *outBuf++ = ']';
527                outBufLen--;
528            } else {
529                goto no_room;
530            }
531        }
532        break;
533    default:
534        fprintf(stderr, "Unknown binary event type %d\n", type);
535        return -1;
536    }
537
538bail:
539    *pEventData = eventData;
540    *pEventDataLen = eventDataLen;
541    *pOutBuf = outBuf;
542    *pOutBufLen = outBufLen;
543    return result;
544
545no_room:
546    result = 1;
547    goto bail;
548}
549
550/**
551 * Convert a binary log entry to ASCII form.
552 *
553 * For convenience we mimic the processLogBuffer API.  There is no
554 * pre-defined output length for the binary data, since we're free to format
555 * it however we choose, which means we can't really use a fixed-size buffer
556 * here.
557 */
558int android_log_processBinaryLogBuffer(struct logger_entry *buf,
559    AndroidLogEntry *entry, const EventTagMap* map, char* messageBuf,
560    int messageBufLen)
561{
562    size_t inCount;
563    unsigned int tagIndex;
564    const unsigned char* eventData;
565
566    entry->tv_sec = buf->sec;
567    entry->tv_nsec = buf->nsec;
568    entry->priority = ANDROID_LOG_INFO;
569    entry->pid = buf->pid;
570    entry->tid = buf->tid;
571
572    /*
573     * Pull the tag out.
574     */
575    eventData = (const unsigned char*) buf->msg;
576    inCount = buf->len;
577    if (inCount < 4)
578        return -1;
579    tagIndex = get4LE(eventData);
580    eventData += 4;
581    inCount -= 4;
582
583    if (map != NULL) {
584        entry->tag = android_lookupEventTag(map, tagIndex);
585    } else {
586        entry->tag = NULL;
587    }
588
589    /*
590     * If we don't have a map, or didn't find the tag number in the map,
591     * stuff a generated tag value into the start of the output buffer and
592     * shift the buffer pointers down.
593     */
594    if (entry->tag == NULL) {
595        int tagLen;
596
597        tagLen = snprintf(messageBuf, messageBufLen, "[%d]", tagIndex);
598        entry->tag = messageBuf;
599        messageBuf += tagLen+1;
600        messageBufLen -= tagLen+1;
601    }
602
603    /*
604     * Format the event log data into the buffer.
605     */
606    char* outBuf = messageBuf;
607    size_t outRemaining = messageBufLen-1;      /* leave one for nul byte */
608    int result;
609    result = android_log_printBinaryEvent(&eventData, &inCount, &outBuf,
610                &outRemaining);
611    if (result < 0) {
612        fprintf(stderr, "Binary log entry conversion failed\n");
613        return -1;
614    } else if (result == 1) {
615        if (outBuf > messageBuf) {
616            /* leave an indicator */
617            *(outBuf-1) = '!';
618        } else {
619            /* no room to output anything at all */
620            *outBuf++ = '!';
621            outRemaining--;
622        }
623        /* pretend we ate all the data */
624        inCount = 0;
625    }
626
627    /* eat the silly terminating '\n' */
628    if (inCount == 1 && *eventData == '\n') {
629        eventData++;
630        inCount--;
631    }
632
633    if (inCount != 0) {
634        fprintf(stderr,
635            "Warning: leftover binary log data (%d bytes)\n", inCount);
636    }
637
638    /*
639     * Terminate the buffer.  The NUL byte does not count as part of
640     * entry->messageLen.
641     */
642    *outBuf = '\0';
643    entry->messageLen = outBuf - messageBuf;
644    assert(entry->messageLen == (messageBufLen-1) - outRemaining);
645
646    entry->message = messageBuf;
647
648    return 0;
649}
650
651/**
652 * Formats a log message into a buffer
653 *
654 * Uses defaultBuffer if it can, otherwise malloc()'s a new buffer
655 * If return value != defaultBuffer, caller must call free()
656 * Returns NULL on malloc error
657 */
658
659char *android_log_formatLogLine (
660    AndroidLogFormat *p_format,
661    char *defaultBuffer,
662    size_t defaultBufferSize,
663    const AndroidLogEntry *entry,
664    size_t *p_outLength)
665{
666#if defined(HAVE_LOCALTIME_R)
667    struct tm tmBuf;
668#endif
669    struct tm* ptm;
670    char timeBuf[32];
671    char headerBuf[128];
672    char prefixBuf[128], suffixBuf[128];
673    char priChar;
674    int prefixSuffixIsHeaderFooter = 0;
675    char * ret = NULL;
676
677    priChar = filterPriToChar(entry->priority);
678
679    /*
680     * Get the current date/time in pretty form
681     *
682     * It's often useful when examining a log with "less" to jump to
683     * a specific point in the file by searching for the date/time stamp.
684     * For this reason it's very annoying to have regexp meta characters
685     * in the time stamp.  Don't use forward slashes, parenthesis,
686     * brackets, asterisks, or other special chars here.
687     */
688#if defined(HAVE_LOCALTIME_R)
689    ptm = localtime_r(&(entry->tv_sec), &tmBuf);
690#else
691    ptm = localtime(&(entry->tv_sec));
692#endif
693    //strftime(timeBuf, sizeof(timeBuf), "%Y-%m-%d %H:%M:%S", ptm);
694    strftime(timeBuf, sizeof(timeBuf), "%m-%d %H:%M:%S", ptm);
695
696    /*
697     * Construct a buffer containing the log header and log message.
698     */
699    size_t prefixLen, suffixLen;
700
701    switch (p_format->format) {
702        case FORMAT_TAG:
703            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
704                "%c/%-8s: ", priChar, entry->tag);
705            strcpy(suffixBuf, "\n"); suffixLen = 1;
706            break;
707        case FORMAT_PROCESS:
708            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
709                "%c(%5d) ", priChar, entry->pid);
710            suffixLen = snprintf(suffixBuf, sizeof(suffixBuf),
711                "  (%s)\n", entry->tag);
712            break;
713        case FORMAT_THREAD:
714            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
715                "%c(%5d:%p) ", priChar, entry->pid, (void*)entry->tid);
716            strcpy(suffixBuf, "\n");
717            suffixLen = 1;
718            break;
719        case FORMAT_RAW:
720            prefixBuf[0] = 0;
721            prefixLen = 0;
722            strcpy(suffixBuf, "\n");
723            suffixLen = 1;
724            break;
725        case FORMAT_TIME:
726            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
727                "%s.%03ld %c/%-8s(%5d): ", timeBuf, entry->tv_nsec / 1000000,
728                priChar, entry->tag, entry->pid);
729            strcpy(suffixBuf, "\n");
730            suffixLen = 1;
731            break;
732        case FORMAT_THREADTIME:
733            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
734                "%s.%03ld %5d %5d %c %-8s: ", timeBuf, entry->tv_nsec / 1000000,
735                (int)entry->pid, (int)entry->tid, priChar, entry->tag);
736            strcpy(suffixBuf, "\n");
737            suffixLen = 1;
738            break;
739        case FORMAT_LONG:
740            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
741                "[ %s.%03ld %5d:%p %c/%-8s ]\n",
742                timeBuf, entry->tv_nsec / 1000000, entry->pid,
743                (void*)entry->tid, priChar, entry->tag);
744            strcpy(suffixBuf, "\n\n");
745            suffixLen = 2;
746            prefixSuffixIsHeaderFooter = 1;
747            break;
748        case FORMAT_BRIEF:
749        default:
750            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
751                "%c/%-8s(%5d): ", priChar, entry->tag, entry->pid);
752            strcpy(suffixBuf, "\n");
753            suffixLen = 1;
754            break;
755    }
756
757    /* the following code is tragically unreadable */
758
759    size_t numLines;
760    size_t i;
761    char *p;
762    size_t bufferSize;
763    const char *pm;
764
765    if (prefixSuffixIsHeaderFooter) {
766        // we're just wrapping message with a header/footer
767        numLines = 1;
768    } else {
769        pm = entry->message;
770        numLines = 0;
771
772        // The line-end finding here must match the line-end finding
773        // in for ( ... numLines...) loop below
774        while (pm < (entry->message + entry->messageLen)) {
775            if (*pm++ == '\n') numLines++;
776        }
777        // plus one line for anything not newline-terminated at the end
778        if (pm > entry->message && *(pm-1) != '\n') numLines++;
779    }
780
781    // this is an upper bound--newlines in message may be counted
782    // extraneously
783    bufferSize = (numLines * (prefixLen + suffixLen)) + entry->messageLen + 1;
784
785    if (defaultBufferSize >= bufferSize) {
786        ret = defaultBuffer;
787    } else {
788        ret = (char *)malloc(bufferSize);
789
790        if (ret == NULL) {
791            return ret;
792        }
793    }
794
795    ret[0] = '\0';       /* to start strcat off */
796
797    p = ret;
798    pm = entry->message;
799
800    if (prefixSuffixIsHeaderFooter) {
801        strcat(p, prefixBuf);
802        p += prefixLen;
803        strncat(p, entry->message, entry->messageLen);
804        p += entry->messageLen;
805        strcat(p, suffixBuf);
806        p += suffixLen;
807    } else {
808        while(pm < (entry->message + entry->messageLen)) {
809            const char *lineStart;
810            size_t lineLen;
811
812            lineStart = pm;
813
814            // Find the next end-of-line in message
815            while (pm < (entry->message + entry->messageLen)
816                    && *pm != '\n') pm++;
817            lineLen = pm - lineStart;
818
819            strcat(p, prefixBuf);
820            p += prefixLen;
821            strncat(p, lineStart, lineLen);
822            p += lineLen;
823            strcat(p, suffixBuf);
824            p += suffixLen;
825
826            if (*pm == '\n') pm++;
827        }
828    }
829
830    if (p_outLength != NULL) {
831        *p_outLength = p - ret;
832    }
833
834    return ret;
835}
836
837/**
838 * Either print or do not print log line, based on filter
839 *
840 * Returns count bytes written
841 */
842
843int android_log_filterAndPrintLogLine(
844    AndroidLogFormat *p_format,
845    int fd,
846    const AndroidLogEntry *entry)
847{
848    int ret;
849    char defaultBuffer[512];
850    char *outBuffer = NULL;
851    size_t totalLen;
852
853    if (0 == android_log_shouldPrintLine(p_format, entry->tag,
854            entry->priority)) {
855        return 0;
856    }
857
858    outBuffer = android_log_formatLogLine(p_format, defaultBuffer,
859            sizeof(defaultBuffer), entry, &totalLen);
860
861    if (!outBuffer)
862        return -1;
863
864    do {
865        ret = write(fd, outBuffer, totalLen);
866    } while (ret < 0 && errno == EINTR);
867
868    if (ret < 0) {
869        fprintf(stderr, "+++ LOG: write failed (errno=%d)\n", errno);
870        ret = 0;
871        goto done;
872    }
873
874    if (((size_t)ret) < totalLen) {
875        fprintf(stderr, "+++ LOG: write partial (%d of %d)\n", ret,
876                (int)totalLen);
877        goto done;
878    }
879
880done:
881    if (outBuffer != defaultBuffer) {
882        free(outBuffer);
883    }
884
885    return ret;
886}
887
888
889
890void logprint_run_tests()
891{
892#if 0
893
894    fprintf(stderr, "tests disabled\n");
895
896#else
897
898    int err;
899    const char *tag;
900    AndroidLogFormat *p_format;
901
902    p_format = android_log_format_new();
903
904    fprintf(stderr, "running tests\n");
905
906    tag = "random";
907
908    android_log_addFilterRule(p_format,"*:i");
909
910    assert (ANDROID_LOG_INFO == filterPriForTag(p_format, "random"));
911    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) == 0);
912    android_log_addFilterRule(p_format, "*");
913    assert (ANDROID_LOG_DEBUG == filterPriForTag(p_format, "random"));
914    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
915    android_log_addFilterRule(p_format, "*:v");
916    assert (ANDROID_LOG_VERBOSE == filterPriForTag(p_format, "random"));
917    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
918    android_log_addFilterRule(p_format, "*:i");
919    assert (ANDROID_LOG_INFO == filterPriForTag(p_format, "random"));
920    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) == 0);
921
922    android_log_addFilterRule(p_format, "random");
923    assert (ANDROID_LOG_VERBOSE == filterPriForTag(p_format, "random"));
924    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
925    android_log_addFilterRule(p_format, "random:v");
926    assert (ANDROID_LOG_VERBOSE == filterPriForTag(p_format, "random"));
927    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
928    android_log_addFilterRule(p_format, "random:d");
929    assert (ANDROID_LOG_DEBUG == filterPriForTag(p_format, "random"));
930    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
931    android_log_addFilterRule(p_format, "random:w");
932    assert (ANDROID_LOG_WARN == filterPriForTag(p_format, "random"));
933    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) == 0);
934
935    android_log_addFilterRule(p_format, "crap:*");
936    assert (ANDROID_LOG_VERBOSE== filterPriForTag(p_format, "crap"));
937    assert(android_log_shouldPrintLine(p_format, "crap", ANDROID_LOG_VERBOSE) > 0);
938
939    // invalid expression
940    err = android_log_addFilterRule(p_format, "random:z");
941    assert (err < 0);
942    assert (ANDROID_LOG_WARN == filterPriForTag(p_format, "random"));
943    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) == 0);
944
945    // Issue #550946
946    err = android_log_addFilterString(p_format, " ");
947    assert(err == 0);
948    assert(ANDROID_LOG_WARN == filterPriForTag(p_format, "random"));
949
950    // note trailing space
951    err = android_log_addFilterString(p_format, "*:s random:d ");
952    assert(err == 0);
953    assert(ANDROID_LOG_DEBUG == filterPriForTag(p_format, "random"));
954
955    err = android_log_addFilterString(p_format, "*:s random:z");
956    assert(err < 0);
957
958
959#if 0
960    char *ret;
961    char defaultBuffer[512];
962
963    ret = android_log_formatLogLine(p_format,
964        defaultBuffer, sizeof(defaultBuffer), 0, ANDROID_LOG_ERROR, 123,
965        123, 123, "random", "nofile", strlen("Hello"), "Hello", NULL);
966#endif
967
968
969    fprintf(stderr, "tests complete\n");
970#endif
971}
972