Initial Contribution

1 files changed, 972 insertions, 0 deletions

diff --git a/liblog/logprint.c b/liblog/logprint.c
new file mode 100644
index 0000000..2cf1254
--- /dev/null
+++ b/liblog/logprint.c
@@ -0,0 +1,972 @@
+/* //device/libs/cutils/logprint.c
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#define _GNU_SOURCE /* for asprintf */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <alloca.h>
+#include <assert.h>
+#include <arpa/inet.h>
+
+#include <cutils/logd.h>
+#include <cutils/logprint.h>
+
+typedef struct FilterInfo_t {
+    char *mTag;
+    android_LogPriority mPri;
+    struct FilterInfo_t *p_next;
+} FilterInfo;
+
+struct AndroidLogFormat_t {
+    android_LogPriority global_pri;
+    FilterInfo *filters;
+    AndroidLogPrintFormat format;
+};
+
+static FilterInfo * filterinfo_new(const char * tag, android_LogPriority pri)
+{
+    FilterInfo *p_ret;
+
+    p_ret = (FilterInfo *)calloc(1, sizeof(FilterInfo));
+    p_ret->mTag = strdup(tag);
+    p_ret->mPri = pri;
+
+    return p_ret;
+}
+
+static void filterinfo_free(FilterInfo *p_info)
+{
+    if (p_info == NULL) {
+        return;
+    }
+
+    free(p_info->mTag);
+    p_info->mTag = NULL;
+}
+
+/*
+ * Note: also accepts 0-9 priorities
+ * returns ANDROID_LOG_UNKNOWN if the character is unrecognized
+ */
+static android_LogPriority filterCharToPri (char c)
+{
+    android_LogPriority pri;
+
+    c = tolower(c);
+
+    if (c >= '0' && c <= '9') {
+        if (c >= ('0'+ANDROID_LOG_SILENT)) {
+            pri = ANDROID_LOG_VERBOSE;
+        } else {
+            pri = (android_LogPriority)(c - '0');
+        }
+    } else if (c == 'v') {
+        pri = ANDROID_LOG_VERBOSE;
+    } else if (c == 'd') {
+        pri = ANDROID_LOG_DEBUG;
+    } else if (c == 'i') {
+        pri = ANDROID_LOG_INFO;
+    } else if (c == 'w') {
+        pri = ANDROID_LOG_WARN;
+    } else if (c == 'e') {
+        pri = ANDROID_LOG_ERROR;
+    } else if (c == 'f') {
+        pri = ANDROID_LOG_FATAL;
+    } else if (c == 's') {
+        pri = ANDROID_LOG_SILENT;
+    } else if (c == '*') {
+        pri = ANDROID_LOG_DEFAULT;
+    } else {
+        pri = ANDROID_LOG_UNKNOWN;
+    }
+
+    return pri;
+}
+
+static char filterPriToChar (android_LogPriority pri)
+{
+    switch (pri) {
+        case ANDROID_LOG_VERBOSE:       return 'V';
+        case ANDROID_LOG_DEBUG:         return 'D';
+        case ANDROID_LOG_INFO:          return 'I';
+        case ANDROID_LOG_WARN:          return 'W';
+        case ANDROID_LOG_ERROR:         return 'E';
+        case ANDROID_LOG_FATAL:         return 'F';
+        case ANDROID_LOG_SILENT:        return 'S';
+
+        case ANDROID_LOG_DEFAULT:
+        case ANDROID_LOG_UNKNOWN:
+        default:                        return '?';
+    }
+}
+
+static android_LogPriority filterPriForTag(
+        AndroidLogFormat *p_format, const char *tag)
+{
+    FilterInfo *p_curFilter;
+
+    for (p_curFilter = p_format->filters
+            ; p_curFilter != NULL
+            ; p_curFilter = p_curFilter->p_next
+    ) {
+        if (0 == strcmp(tag, p_curFilter->mTag)) {
+            if (p_curFilter->mPri == ANDROID_LOG_DEFAULT) {
+                return p_format->global_pri;
+            } else {
+                return p_curFilter->mPri;
+            }
+        }
+    }
+
+    return p_format->global_pri;
+}
+
+/** for debugging */
+static void dumpFilters(AndroidLogFormat *p_format)
+{
+    FilterInfo *p_fi;
+
+    for (p_fi = p_format->filters ; p_fi != NULL ; p_fi = p_fi->p_next) {
+        char cPri = filterPriToChar(p_fi->mPri);
+        if (p_fi->mPri == ANDROID_LOG_DEFAULT) {
+            cPri = filterPriToChar(p_format->global_pri);
+        }
+        fprintf(stderr,"%s:%c\n", p_fi->mTag, cPri);
+    }
+
+    fprintf(stderr,"*:%c\n", filterPriToChar(p_format->global_pri));
+
+}
+
+/**
+ * returns 1 if this log line should be printed based on its priority
+ * and tag, and 0 if it should not
+ */
+int android_log_shouldPrintLine (
+        AndroidLogFormat *p_format, const char *tag, android_LogPriority pri)
+{
+    return pri >= filterPriForTag(p_format, tag);
+}
+
+AndroidLogFormat *android_log_format_new()
+{
+    AndroidLogFormat *p_ret;
+
+    p_ret = calloc(1, sizeof(AndroidLogFormat));
+
+    p_ret->global_pri = ANDROID_LOG_VERBOSE;
+    p_ret->format = FORMAT_BRIEF;
+
+    return p_ret;
+}
+
+void android_log_format_free(AndroidLogFormat *p_format)
+{
+    FilterInfo *p_info, *p_info_old;
+
+    p_info = p_format->filters;
+
+    while (p_info != NULL) {
+        p_info_old = p_info;
+        p_info = p_info->p_next;
+
+        free(p_info_old);
+    }
+
+    free(p_format);
+}
+
+
+
+void android_log_setPrintFormat(AndroidLogFormat *p_format,
+        AndroidLogPrintFormat format)
+{
+    p_format->format=format;
+}
+
+/**
+ * Returns FORMAT_OFF on invalid string
+ */
+AndroidLogPrintFormat android_log_formatFromString(const char * formatString)
+{
+    static AndroidLogPrintFormat format;
+
+    if (strcmp(formatString, "brief") == 0) format = FORMAT_BRIEF;
+    else if (strcmp(formatString, "process") == 0) format = FORMAT_PROCESS;
+    else if (strcmp(formatString, "tag") == 0) format = FORMAT_TAG;
+    else if (strcmp(formatString, "thread") == 0) format = FORMAT_THREAD;
+    else if (strcmp(formatString, "raw") == 0) format = FORMAT_RAW;
+    else if (strcmp(formatString, "time") == 0) format = FORMAT_TIME;
+    else if (strcmp(formatString, "threadtime") == 0) format = FORMAT_THREADTIME;
+    else if (strcmp(formatString, "long") == 0) format = FORMAT_LONG;
+    else format = FORMAT_OFF;
+
+    return format;
+}
+
+/**
+ * filterExpression: a single filter expression
+ * eg "AT:d"
+ *
+ * returns 0 on success and -1 on invalid expression
+ *
+ * Assumes single threaded execution
+ */
+
+int android_log_addFilterRule(AndroidLogFormat *p_format,
+        const char *filterExpression)
+{
+    size_t i=0;
+    size_t tagNameLength;
+    android_LogPriority pri = ANDROID_LOG_DEFAULT;
+
+    tagNameLength = strcspn(filterExpression, ":");
+
+    if (tagNameLength == 0) {
+        goto error;
+    }
+
+    if(filterExpression[tagNameLength] == ':') {
+        pri = filterCharToPri(filterExpression[tagNameLength+1]);
+
+        if (pri == ANDROID_LOG_UNKNOWN) {
+            goto error;
+        }
+    }
+
+    if(0 == strncmp("*", filterExpression, tagNameLength)) {
+        // This filter expression refers to the global filter
+        // The default level for this is DEBUG if the priority
+        // is unspecified
+        if (pri == ANDROID_LOG_DEFAULT) {
+            pri = ANDROID_LOG_DEBUG;
+        }
+
+        p_format->global_pri = pri;
+    } else {
+        // for filter expressions that don't refer to the global
+        // filter, the default is verbose if the priority is unspecified
+        if (pri == ANDROID_LOG_DEFAULT) {
+            pri = ANDROID_LOG_VERBOSE;
+        }
+
+        char *tagName;
+
+// Presently HAVE_STRNDUP is never defined, so the second case is always taken
+// Darwin doesn't have strnup, everything else does
+#ifdef HAVE_STRNDUP
+        tagName = strndup(filterExpression, tagNameLength);
+#else
+        //a few extra bytes copied...
+        tagName = strdup(filterExpression);
+        tagName[tagNameLength] = '\0';
+#endif /*HAVE_STRNDUP*/
+
+        FilterInfo *p_fi = filterinfo_new(tagName, pri);
+        free(tagName);
+
+        p_fi->p_next = p_format->filters;
+        p_format->filters = p_fi;
+    }
+
+    return 0;
+error:
+    return -1;
+}
+
+
+/**
+ * filterString: a comma/whitespace-separated set of filter expressions
+ *
+ * eg "AT:d *:i"
+ *
+ * returns 0 on success and -1 on invalid expression
+ *
+ * Assumes single threaded execution
+ *
+ */
+
+int android_log_addFilterString(AndroidLogFormat *p_format,
+        const char *filterString)
+{
+    char *filterStringCopy = strdup (filterString);
+    char *p_cur = filterStringCopy;
+    char *p_ret;
+    int err;
+
+    // Yes, I'm using strsep
+    while (NULL != (p_ret = strsep(&p_cur, " \t,"))) {
+        // ignore whitespace-only entries
+        if(p_ret[0] != '\0') {
+            err = android_log_addFilterRule(p_format, p_ret);
+
+            if (err < 0) {
+                goto error;
+            }
+        }
+    }
+
+    free (filterStringCopy);
+    return 0;
+error:
+    free (filterStringCopy);
+    return -1;
+}
+
+static inline char * strip_end(char *str)
+{
+    char *end = str + strlen(str) - 1;
+
+    while (end >= str && isspace(*end))
+        *end-- = '\0';
+    return str;
+}
+
+/**
+ * Splits a wire-format buffer into an AndroidLogEntry
+ * entry allocated by caller. Pointers will point directly into buf
+ *
+ * Returns 0 on success and -1 on invalid wire format (entry will be
+ * in unspecified state)
+ */
+int android_log_processLogBuffer(struct logger_entry *buf,
+                                 AndroidLogEntry *entry)
+{
+    size_t tag_len;
+
+    entry->tv_sec = buf->sec;
+    entry->tv_nsec = buf->nsec;
+    entry->priority = buf->msg[0];
+    entry->pid = buf->pid;
+    entry->tid = buf->tid;
+    entry->tag = buf->msg + 1;
+    tag_len = strlen(entry->tag);
+    entry->messageLen = buf->len - tag_len - 3;
+    entry->message = entry->tag + tag_len + 1;
+
+    return 0;
+}
+
+/*
+ * Extract a 4-byte value from a byte stream.
+ */
+static inline uint32_t get4LE(const uint8_t* src)
+{
+    return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
+}
+
+/*
+ * Extract an 8-byte value from a byte stream.
+ */
+static inline uint64_t get8LE(const uint8_t* src)
+{
+    uint32_t low, high;
+
+    low = src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
+    high = src[4] | (src[5] << 8) | (src[6] << 16) | (src[7] << 24);
+    return ((long long) high << 32) | (long long) low;
+}
+
+
+/*
+ * Recursively convert binary log data to printable form.
+ *
+ * This needs to be recursive because you can have lists of lists.
+ *
+ * If we run out of room, we stop processing immediately.  It's important
+ * for us to check for space on every output element to avoid producing
+ * garbled output.
+ *
+ * Returns 0 on success, 1 on buffer full, -1 on failure.
+ */
+static int android_log_printBinaryEvent(const unsigned char** pEventData,
+    size_t* pEventDataLen, char** pOutBuf, size_t* pOutBufLen)
+{
+    const unsigned char* eventData = *pEventData;
+    size_t eventDataLen = *pEventDataLen;
+    char* outBuf = *pOutBuf;
+    size_t outBufLen = *pOutBufLen;
+    unsigned char type;
+    size_t outCount;
+    int result = 0;
+
+    if (eventDataLen < 1)
+        return -1;
+    type = *eventData++;
+    eventDataLen--;
+
+    //fprintf(stderr, "--- type=%d (rem len=%d)\n", type, eventDataLen);
+
+    switch (type) {
+    case EVENT_TYPE_INT:
+        /* 32-bit signed int */
+        {
+            int ival;
+
+            if (eventDataLen < 4)
+                return -1;
+            ival = get4LE(eventData);
+            eventData += 4;
+            eventDataLen -= 4;
+
+            outCount = snprintf(outBuf, outBufLen, "%d", ival);
+            if (outCount < outBufLen) {
+                outBuf += outCount;
+                outBufLen -= outCount;
+            } else {
+                /* halt output */
+                goto no_room;
+            }
+        }
+        break;
+    case EVENT_TYPE_LONG:
+        /* 64-bit signed long */
+        {
+            long long lval;
+
+            if (eventDataLen < 8)
+                return -1;
+            lval = get8LE(eventData);
+            eventData += 8;
+            eventDataLen -= 8;
+
+            outCount = snprintf(outBuf, outBufLen, "%lld", lval);
+            if (outCount < outBufLen) {
+                outBuf += outCount;
+                outBufLen -= outCount;
+            } else {
+                /* halt output */
+                goto no_room;
+            }
+        }
+        break;
+    case EVENT_TYPE_STRING:
+        /* UTF-8 chars, not NULL-terminated */
+        {
+            unsigned int strLen;
+
+            if (eventDataLen < 4)
+                return -1;
+            strLen = get4LE(eventData);
+            eventData += 4;
+            eventDataLen -= 4;
+
+            if (eventDataLen < strLen)
+                return -1;
+
+            if (strLen < outBufLen) {
+                memcpy(outBuf, eventData, strLen);
+                outBuf += strLen;
+                outBufLen -= strLen;
+            } else if (outBufLen > 0) {
+                /* copy what we can */
+                memcpy(outBuf, eventData, outBufLen);
+                outBuf += outBufLen;
+                outBufLen -= outBufLen;
+                goto no_room;
+            }
+            eventData += strLen;
+            eventDataLen -= strLen;
+            break;
+        }
+    case EVENT_TYPE_LIST:
+        /* N items, all different types */
+        {
+            unsigned char count;
+            int i;
+
+            if (eventDataLen < 1)
+                return -1;
+
+            count = *eventData++;
+            eventDataLen--;
+
+            if (outBufLen > 0) {
+                *outBuf++ = '[';
+                outBufLen--;
+            } else {
+                goto no_room;
+            }
+
+            for (i = 0; i < count; i++) {
+                result = android_log_printBinaryEvent(&eventData, &eventDataLen,
+                        &outBuf, &outBufLen);
+                if (result != 0)
+                    goto bail;
+
+                if (i < count-1) {
+                    if (outBufLen > 0) {
+                        *outBuf++ = ',';
+                        outBufLen--;
+                    } else {
+                        goto no_room;
+                    }
+                }
+            }
+
+            if (outBufLen > 0) {
+                *outBuf++ = ']';
+                outBufLen--;
+            } else {
+                goto no_room;
+            }
+        }
+        break;
+    default:
+        fprintf(stderr, "Unknown binary event type %d\n", type);
+        return -1;
+    }
+
+bail:
+    *pEventData = eventData;
+    *pEventDataLen = eventDataLen;
+    *pOutBuf = outBuf;
+    *pOutBufLen = outBufLen;
+    return result;
+
+no_room:
+    result = 1;
+    goto bail;
+}
+
+/**
+ * Convert a binary log entry to ASCII form.
+ *
+ * For convenience we mimic the processLogBuffer API.  There is no
+ * pre-defined output length for the binary data, since we're free to format
+ * it however we choose, which means we can't really use a fixed-size buffer
+ * here.
+ */
+int android_log_processBinaryLogBuffer(struct logger_entry *buf,
+    AndroidLogEntry *entry, const EventTagMap* map, char* messageBuf,
+    int messageBufLen)
+{
+    size_t inCount;
+    unsigned int tagIndex;
+    const unsigned char* eventData;
+
+    entry->tv_sec = buf->sec;
+    entry->tv_nsec = buf->nsec;
+    entry->priority = ANDROID_LOG_INFO;
+    entry->pid = buf->pid;
+    entry->tid = buf->tid;
+
+    /*
+     * Pull the tag out.
+     */
+    eventData = (const unsigned char*) buf->msg;
+    inCount = buf->len;
+    if (inCount < 4)
+        return -1;
+    tagIndex = get4LE(eventData);
+    eventData += 4;
+    inCount -= 4;
+
+    if (map != NULL) {
+        entry->tag = android_lookupEventTag(map, tagIndex);
+    } else {
+        entry->tag = NULL;
+    }
+
+    /*
+     * If we don't have a map, or didn't find the tag number in the map,
+     * stuff a generated tag value into the start of the output buffer and
+     * shift the buffer pointers down.
+     */
+    if (entry->tag == NULL) {
+        int tagLen;
+
+        tagLen = snprintf(messageBuf, messageBufLen, "[%d]", tagIndex);
+        entry->tag = messageBuf;
+        messageBuf += tagLen+1;
+        messageBufLen -= tagLen+1;
+    }
+
+    /*
+     * Format the event log data into the buffer.
+     */
+    char* outBuf = messageBuf;
+    size_t outRemaining = messageBufLen-1;      /* leave one for nul byte */
+    int result;
+    result = android_log_printBinaryEvent(&eventData, &inCount, &outBuf,
+                &outRemaining);
+    if (result < 0) {
+        fprintf(stderr, "Binary log entry conversion failed\n");
+        return -1;
+    } else if (result == 1) {
+        if (outBuf > messageBuf) {
+            /* leave an indicator */
+            *(outBuf-1) = '!';
+        } else {
+            /* no room to output anything at all */
+            *outBuf++ = '!';
+            outRemaining--;
+        }
+        /* pretend we ate all the data */
+        inCount = 0;
+    }
+
+    /* eat the silly terminating '\n' */
+    if (inCount == 1 && *eventData == '\n') {
+        eventData++;
+        inCount--;
+    }
+
+    if (inCount != 0) {
+        fprintf(stderr,
+            "Warning: leftover binary log data (%d bytes)\n", inCount);
+    }
+
+    /*
+     * Terminate the buffer.  The NUL byte does not count as part of
+     * entry->messageLen.
+     */
+    *outBuf = '\0';
+    entry->messageLen = outBuf - messageBuf;
+    assert(entry->messageLen == (messageBufLen-1) - outRemaining);
+
+    entry->message = messageBuf;
+
+    return 0;
+}
+
+/**
+ * Formats a log message into a buffer
+ *
+ * Uses defaultBuffer if it can, otherwise malloc()'s a new buffer
+ * If return value != defaultBuffer, caller must call free()
+ * Returns NULL on malloc error
+ */
+
+char *android_log_formatLogLine (
+    AndroidLogFormat *p_format,
+    char *defaultBuffer,
+    size_t defaultBufferSize,
+    const AndroidLogEntry *entry,
+    size_t *p_outLength)
+{
+#if defined(HAVE_LOCALTIME_R)
+    struct tm tmBuf;
+#endif
+    struct tm* ptm;
+    char timeBuf[32];
+    char headerBuf[128];
+    char prefixBuf[128], suffixBuf[128];
+    char priChar;
+    int prefixSuffixIsHeaderFooter = 0;
+    char * ret = NULL;
+
+    priChar = filterPriToChar(entry->priority);
+
+    /*
+     * Get the current date/time in pretty form
+     *
+     * It's often useful when examining a log with "less" to jump to
+     * a specific point in the file by searching for the date/time stamp.
+     * For this reason it's very annoying to have regexp meta characters
+     * in the time stamp.  Don't use forward slashes, parenthesis,
+     * brackets, asterisks, or other special chars here.
+     */
+#if defined(HAVE_LOCALTIME_R)
+    ptm = localtime_r(&(entry->tv_sec), &tmBuf);
+#else
+    ptm = localtime(&(entry->tv_sec));
+#endif
+    //strftime(timeBuf, sizeof(timeBuf), "%Y-%m-%d %H:%M:%S", ptm);
+    strftime(timeBuf, sizeof(timeBuf), "%m-%d %H:%M:%S", ptm);
+
+    /*
+     * Construct a buffer containing the log header and log message.
+     */
+    size_t prefixLen, suffixLen;
+
+    switch (p_format->format) {
+        case FORMAT_TAG:
+            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
+                "%c/%-8s: ", priChar, entry->tag);
+            strcpy(suffixBuf, "\n"); suffixLen = 1;
+            break;
+        case FORMAT_PROCESS:
+            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
+                "%c(%5d) ", priChar, entry->pid);
+            suffixLen = snprintf(suffixBuf, sizeof(suffixBuf),
+                "  (%s)\n", entry->tag);
+            break;
+        case FORMAT_THREAD:
+            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
+                "%c(%5d:%p) ", priChar, entry->pid, (void*)entry->tid);
+            strcpy(suffixBuf, "\n");
+            suffixLen = 1;
+            break;
+        case FORMAT_RAW:
+            prefixBuf[0] = 0;
+            prefixLen = 0;
+            strcpy(suffixBuf, "\n");
+            suffixLen = 1;
+            break;
+        case FORMAT_TIME:
+            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
+                "%s.%03ld %c/%-8s(%5d): ", timeBuf, entry->tv_nsec / 1000000,
+                priChar, entry->tag, entry->pid);
+            strcpy(suffixBuf, "\n");
+            suffixLen = 1;
+            break;
+        case FORMAT_THREADTIME:
+            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
+                "%s.%03ld %5d %5d %c %-8s: ", timeBuf, entry->tv_nsec / 1000000,
+                (int)entry->pid, (int)entry->tid, priChar, entry->tag);
+            strcpy(suffixBuf, "\n");
+            suffixLen = 1;
+            break;
+        case FORMAT_LONG:
+            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
+                "[ %s.%03ld %5d:%p %c/%-8s ]\n",
+                timeBuf, entry->tv_nsec / 1000000, entry->pid,
+                (void*)entry->tid, priChar, entry->tag);
+            strcpy(suffixBuf, "\n\n");
+            suffixLen = 2;
+            prefixSuffixIsHeaderFooter = 1;
+            break;
+        case FORMAT_BRIEF:
+        default:
+            prefixLen = snprintf(prefixBuf, sizeof(prefixBuf),
+                "%c/%-8s(%5d): ", priChar, entry->tag, entry->pid);
+            strcpy(suffixBuf, "\n");
+            suffixLen = 1;
+            break;
+    }
+
+    /* the following code is tragically unreadable */
+
+    size_t numLines;
+    size_t i;
+    char *p;
+    size_t bufferSize;
+    const char *pm;
+
+    if (prefixSuffixIsHeaderFooter) {
+        // we're just wrapping message with a header/footer
+        numLines = 1;
+    } else {
+        pm = entry->message;
+        numLines = 0;
+
+        // The line-end finding here must match the line-end finding
+        // in for ( ... numLines...) loop below
+        while (pm < (entry->message + entry->messageLen)) {
+            if (*pm++ == '\n') numLines++;
+        }
+        // plus one line for anything not newline-terminated at the end
+        if (pm > entry->message && *(pm-1) != '\n') numLines++;
+    }
+
+    // this is an upper bound--newlines in message may be counted
+    // extraneously
+    bufferSize = (numLines * (prefixLen + suffixLen)) + entry->messageLen + 1;
+
+    if (defaultBufferSize >= bufferSize) {
+        ret = defaultBuffer;
+    } else {
+        ret = (char *)malloc(bufferSize);
+
+        if (ret == NULL) {
+            return ret;
+        }
+    }
+
+    ret[0] = '\0';       /* to start strcat off */
+
+    p = ret;
+    pm = entry->message;
+
+    if (prefixSuffixIsHeaderFooter) {
+        strcat(p, prefixBuf);
+        p += prefixLen;
+        strncat(p, entry->message, entry->messageLen);
+        p += entry->messageLen;
+        strcat(p, suffixBuf);
+        p += suffixLen;
+    } else {
+        while(pm < (entry->message + entry->messageLen)) {
+            const char *lineStart;
+            size_t lineLen;
+
+            lineStart = pm;
+
+            // Find the next end-of-line in message
+            while (pm < (entry->message + entry->messageLen)
+                    && *pm != '\n') pm++;
+            lineLen = pm - lineStart;
+
+            strcat(p, prefixBuf);
+            p += prefixLen;
+            strncat(p, lineStart, lineLen);
+            p += lineLen;
+            strcat(p, suffixBuf);
+            p += suffixLen;
+
+            if (*pm == '\n') pm++;
+        }
+    }
+
+    if (p_outLength != NULL) {
+        *p_outLength = p - ret;
+    }
+
+    return ret;
+}
+
+/**
+ * Either print or do not print log line, based on filter
+ *
+ * Returns count bytes written
+ */
+
+int android_log_filterAndPrintLogLine(
+    AndroidLogFormat *p_format,
+    int fd,
+    const AndroidLogEntry *entry)
+{
+    int ret;
+    char defaultBuffer[512];
+    char *outBuffer = NULL;
+    size_t totalLen;
+
+    if (0 == android_log_shouldPrintLine(p_format, entry->tag,
+            entry->priority)) {
+        return 0;
+    }
+
+    outBuffer = android_log_formatLogLine(p_format, defaultBuffer,
+            sizeof(defaultBuffer), entry, &totalLen);
+
+    if (!outBuffer)
+        return -1;
+
+    do {
+        ret = write(fd, outBuffer, totalLen);
+    } while (ret < 0 && errno == EINTR);
+
+    if (ret < 0) {
+        fprintf(stderr, "+++ LOG: write failed (errno=%d)\n", errno);
+        ret = 0;
+        goto done;
+    }
+
+    if (((size_t)ret) < totalLen) {
+        fprintf(stderr, "+++ LOG: write partial (%d of %d)\n", ret,
+                (int)totalLen);
+        goto done;
+    }
+
+done:
+    if (outBuffer != defaultBuffer) {
+        free(outBuffer);
+    }
+
+    return ret;
+}
+
+
+
+void logprint_run_tests()
+{
+#if 0
+
+    fprintf(stderr, "tests disabled\n");
+
+#else
+
+    int err;
+    const char *tag;
+    AndroidLogFormat *p_format;
+
+    p_format = android_log_format_new();
+
+    fprintf(stderr, "running tests\n");
+
+    tag = "random";
+
+    android_log_addFilterRule(p_format,"*:i");
+
+    assert (ANDROID_LOG_INFO == filterPriForTag(p_format, "random"));
+    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) == 0);
+    android_log_addFilterRule(p_format, "*");
+    assert (ANDROID_LOG_DEBUG == filterPriForTag(p_format, "random"));
+    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
+    android_log_addFilterRule(p_format, "*:v");
+    assert (ANDROID_LOG_VERBOSE == filterPriForTag(p_format, "random"));
+    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
+    android_log_addFilterRule(p_format, "*:i");
+    assert (ANDROID_LOG_INFO == filterPriForTag(p_format, "random"));
+    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) == 0);
+
+    android_log_addFilterRule(p_format, "random");
+    assert (ANDROID_LOG_VERBOSE == filterPriForTag(p_format, "random"));
+    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
+    android_log_addFilterRule(p_format, "random:v");
+    assert (ANDROID_LOG_VERBOSE == filterPriForTag(p_format, "random"));
+    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
+    android_log_addFilterRule(p_format, "random:d");
+    assert (ANDROID_LOG_DEBUG == filterPriForTag(p_format, "random"));
+    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) > 0);
+    android_log_addFilterRule(p_format, "random:w");
+    assert (ANDROID_LOG_WARN == filterPriForTag(p_format, "random"));
+    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) == 0);
+
+    android_log_addFilterRule(p_format, "crap:*");
+    assert (ANDROID_LOG_VERBOSE== filterPriForTag(p_format, "crap"));
+    assert(android_log_shouldPrintLine(p_format, "crap", ANDROID_LOG_VERBOSE) > 0);
+
+    // invalid expression
+    err = android_log_addFilterRule(p_format, "random:z");
+    assert (err < 0);
+    assert (ANDROID_LOG_WARN == filterPriForTag(p_format, "random"));
+    assert(android_log_shouldPrintLine(p_format, tag, ANDROID_LOG_DEBUG) == 0);
+
+    // Issue #550946
+    err = android_log_addFilterString(p_format, " ");
+    assert(err == 0);
+    assert(ANDROID_LOG_WARN == filterPriForTag(p_format, "random"));
+
+    // note trailing space
+    err = android_log_addFilterString(p_format, "*:s random:d ");
+    assert(err == 0);
+    assert(ANDROID_LOG_DEBUG == filterPriForTag(p_format, "random"));
+
+    err = android_log_addFilterString(p_format, "*:s random:z");
+    assert(err < 0);
+
+
+#if 0
+    char *ret;
+    char defaultBuffer[512];
+
+    ret = android_log_formatLogLine(p_format,
+        defaultBuffer, sizeof(defaultBuffer), 0, ANDROID_LOG_ERROR, 123,
+        123, 123, "random", "nofile", strlen("Hello"), "Hello", NULL);
+#endif
+
+
+    fprintf(stderr, "tests complete\n");
+#endif
+}