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 #if defined(_EGL_PLATFORM_X)
  25    char *log_env = getenv("EGL_LOG_LEVEL");
  26 #else
  27    char *log_env = NULL;
  28 #endif
  29
  30    if (log_env == NULL) {
  31       ReportingLevel = FALLBACK_LOG_LEVEL;
  32    }
  33    else if (strcasecmp(log_env, "fatal") == 0) {
  34       ReportingLevel = _EGL_FATAL;
  35    }
  36    else if (strcasecmp(log_env, "warning") == 0) {
  37       ReportingLevel = _EGL_WARNING;
  38    }
  39    else if (strcasecmp(log_env, "info") == 0) {
  40       ReportingLevel = _EGL_INFO;
  41    }
  42    else if (strcasecmp(log_env, "debug") == 0) {
  43       ReportingLevel = _EGL_DEBUG;
  44    }
  45    else {
  46       fprintf(stderr, "Unrecognized EGL_LOG_LEVEL environment variable value. "
  47               "Expected one of \"fatal\", \"warning\", \"info\", \"debug\". "
  48               "Got \"%s\". Falling back to \"%s\".\n",
  49               log_env, FALLBACK_LOG_LEVEL_STR);
  50       ReportingLevel = FALLBACK_LOG_LEVEL;
  51    }
  52 }
  53
  54
  55 /**
  56  * Log a message to stderr.
  57  * \param level one of _EGL_FATAL, _EGL_WARNING, _EGL_INFO, _EGL_DEBUG.
  58  */
  59 void
  60 _eglLog(EGLint level, const char *fmtStr, ...)
  61 {
  62    va_list args;
  63    char msg[MAXSTRING];
  64    const char *levelStr;
  65    static int log_level_initialized = 0;
  66
  67    if (!log_level_initialized) {
  68       log_level_initialize();
  69       log_level_initialized = 1;
  70    }
  71
  72    if (level <= ReportingLevel) {
  73       switch (level) {
  74       case _EGL_FATAL:
  75          levelStr = "Fatal";
  76          break;
  77       case _EGL_WARNING:
  78          levelStr = "Warning";
  79          break;
  80       case _EGL_INFO:
  81          levelStr = "Info";
  82          break;
  83       case _EGL_DEBUG:
  84          levelStr = "Debug";
  85          break;
  86       default:
  87          levelStr = "";
  88       }
  89
  90       va_start(args, fmtStr);
  91       vsnprintf(msg, MAXSTRING, fmtStr, args);
  92       va_end(args);
  93
  94       fprintf(stderr, "libEGL %s: %s\n", levelStr, msg);
  95
  96       if (level == _EGL_FATAL) {
  97          exit(1); /* or abort()? */
  98       }
  99    }
 100 }