src/egl/main/egllog.c

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