src/egl/main/egllog.c

   1 /**
   2  * Logging facility for debug/info messages.
   3  * _EGL_FATAL messages are printed to stderr
   4  * The EGL_LOG_LEVEL var controls the output of other warning/info/debug msgs.
   5  */
   6
   7
   8 #include <stdarg.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include "egllog.h"
  13
  14 #define MAXSTRING 1000
  15 #define FALLBACK_LOG_LEVEL      _EGL_WARNING
  16 #define FALLBACK_LOG_LEVEL_STR  "warning"
  17
  18 static EGLint ReportingLevel = -1;
  19
  20
  21 static void
  22 log_level_initialize(void)
  23 {
  24    char *log_env = getenv("EGL_LOG_LEVEL");
  25
  26    if (log_env == NULL) {
  27       ReportingLevel = FALLBACK_LOG_LEVEL;
  28    }
  29    else if (strcasecmp(log_env, "fatal") == 0) {
  30       ReportingLevel = _EGL_FATAL;
  31    }
  32    else if (strcasecmp(log_env, "warning") == 0) {
  33       ReportingLevel = _EGL_WARNING;
  34    }
  35    else if (strcasecmp(log_env, "info") == 0) {
  36       ReportingLevel = _EGL_INFO;
  37    }
  38    else if (strcasecmp(log_env, "debug") == 0) {
  39       ReportingLevel = _EGL_DEBUG;
  40    }
  41    else {
  42       fprintf(stderr, "Unrecognized EGL_LOG_LEVEL environment variable value. "
  43               "Expected one of \"fatal\", \"warning\", \"info\", \"debug\". "
  44               "Got \"%s\". Falling back to \"%s\".\n",
  45               log_env, FALLBACK_LOG_LEVEL_STR);
  46       ReportingLevel = FALLBACK_LOG_LEVEL;
  47    }
  48 }
  49
  50
  51 /**
  52  * Log a message to stderr.
  53  * \param level one of _EGL_FATAL, _EGL_WARNING, _EGL_INFO, _EGL_DEBUG.
  54  */
  55 void
  56 _eglLog(EGLint level, const char *fmtStr, ...)
  57 {
  58    va_list args;
  59    char msg[MAXSTRING];
  60    const char *levelStr;
  61    static int log_level_initialized = 0;
  62
  63    if (!log_level_initialized) {
  64       log_level_initialize();
  65       log_level_initialized = 1;
  66    }
  67
  68    if (level <= ReportingLevel) {
  69       switch (level) {
  70       case _EGL_FATAL:
  71          levelStr = "Fatal";
  72          break;
  73       case _EGL_WARNING:
  74          levelStr = "Warning";
  75          break;
  76       case _EGL_INFO:
  77          levelStr = "Info";
  78          break;
  79       case _EGL_DEBUG:
  80          levelStr = "Debug";
  81          break;
  82       default:
  83          levelStr = "";
  84       }
  85
  86       va_start(args, fmtStr);
  87       vsnprintf(msg, MAXSTRING, fmtStr, args);
  88       va_end(args);
  89
  90       fprintf(stderr, "libEGL %s: %s\n", levelStr, msg);
  91
  92       if (level == _EGL_FATAL) {
  93          exit(1); /* or abort()? */
  94       }
  95    }
  96 }