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      1 /*
      2  * Copyright  2017 Google, Inc.
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     21  * IN THE SOFTWARE.
     22  */
     23 
     24 #include <stdarg.h>
     25 
     26 #ifdef ANDROID
     27 #include <android/log.h>
     28 #else
     29 #include <stdio.h>
     30 #endif
     31 
     32 #include <stdlib.h>
     33 #include <string.h>
     34 #include "util/detect_os.h"
     35 #include "util/log.h"
     36 #include "util/ralloc.h"
     37 
     38 #ifdef ANDROID
     39 static inline android_LogPriority
     40 level_to_android(enum mesa_log_level l)
     41 {
     42    switch (l) {
     43    case MESA_LOG_ERROR: return ANDROID_LOG_ERROR;
     44    case MESA_LOG_WARN: return ANDROID_LOG_WARN;
     45    case MESA_LOG_INFO: return ANDROID_LOG_INFO;
     46    case MESA_LOG_DEBUG: return ANDROID_LOG_DEBUG;
     47    }
     48 
     49    unreachable("bad mesa_log_level");
     50 }
     51 #endif
     52 
     53 #ifndef ANDROID
     54 static inline const char *
     55 level_to_str(enum mesa_log_level l)
     56 {
     57    switch (l) {
     58    case MESA_LOG_ERROR: return "error";
     59    case MESA_LOG_WARN: return "warning";
     60    case MESA_LOG_INFO: return "info";
     61    case MESA_LOG_DEBUG: return "debug";
     62    }
     63 
     64    unreachable("bad mesa_log_level");
     65 }
     66 #endif
     67 
     68 void
     69 mesa_log(enum mesa_log_level level, const char *tag, const char *format, ...)
     70 {
     71    va_list va;
     72 
     73    va_start(va, format);
     74    mesa_log_v(level, tag, format, va);
     75    va_end(va);
     76 }
     77 
     78 void
     79 mesa_log_v(enum mesa_log_level level, const char *tag, const char *format,
     80             va_list va)
     81 {
     82 #ifdef ANDROID
     83    __android_log_vprint(level_to_android(level), tag, format, va);
     84 #else
     85 #if !DETECT_OS_WINDOWS
     86    flockfile(stderr);
     87 #endif
     88    fprintf(stderr, "%s: %s: ", tag, level_to_str(level));
     89    vfprintf(stderr, format, va);
     90    fprintf(stderr, "\n");
     91 #if !DETECT_OS_WINDOWS
     92    funlockfile(stderr);
     93 #endif
     94 #endif
     95 }
     96 
     97 struct log_stream *
     98 _mesa_log_stream_create(enum mesa_log_level level, char *tag)
     99 {
    100    struct log_stream *stream = ralloc(NULL, struct log_stream);
    101    stream->level = level;
    102    stream->tag = tag;
    103    stream->msg = ralloc_strdup(stream, "");
    104    stream->pos = 0;
    105    return stream;
    106 }
    107 
    108 void
    109 mesa_log_stream_destroy(struct log_stream *stream)
    110 {
    111    /* If you left trailing stuff in the log stream, flush it out as a line. */
    112    if (stream->pos != 0)
    113       mesa_log(stream->level, stream->tag, "%s", stream->msg);
    114 
    115    ralloc_free(stream);
    116 }
    117 
    118 static void
    119 mesa_log_stream_flush(struct log_stream *stream, size_t scan_offset)
    120 {
    121    char *end;
    122    char *next = stream->msg;
    123    while ((end = strchr(stream->msg + scan_offset, '\n'))) {
    124       *end = 0;
    125       mesa_log(stream->level, stream->tag, "%s", next);
    126       next = end + 1;
    127       scan_offset = next - stream->msg;
    128    }
    129    if (next != stream->msg) {
    130       /* Clear out the lines we printed and move any trailing chars to the start. */
    131       size_t remaining = stream->msg + stream->pos - next;
    132       memmove(stream->msg, next, remaining);
    133       stream->pos = remaining;
    134    }
    135 }
    136 
    137 void mesa_log_stream_printf(struct log_stream *stream, const char *format, ...)
    138 {
    139    size_t old_pos = stream->pos;
    140 
    141    va_list va;
    142    va_start(va, format);
    143    ralloc_vasprintf_rewrite_tail(&stream->msg, &stream->pos, format, va);
    144    va_end(va);
    145 
    146    mesa_log_stream_flush(stream, old_pos);
    147 }
    148 
    149 void
    150 _mesa_log_multiline(enum mesa_log_level level, const char *tag, const char *lines)
    151 {
    152    struct log_stream tmp = {
    153       .level = level,
    154       .tag = tag,
    155       .msg = strdup(lines),
    156       .pos = strlen(lines),
    157    };
    158    mesa_log_stream_flush(&tmp, 0);
    159    free(tmp.msg);
    160 }
    161