+static const char *
+log_level_to_prefix(enum xkb_log_level level)
+{
+ switch (level) {
+ case XKB_LOG_LEVEL_DEBUG:
+ return "xkbcommon: DEBUG: ";
+ case XKB_LOG_LEVEL_INFO:
+ return "xkbcommon: INFO: ";
+ case XKB_LOG_LEVEL_WARNING:
+ return "xkbcommon: WARNING: ";
+ case XKB_LOG_LEVEL_ERROR:
+ return "xkbcommon: ERROR: ";
+ case XKB_LOG_LEVEL_CRITICAL:
+ return "xkbcommon: CRITICAL: ";
+ default:
+ return NULL;
+ }
+}
+
+ATTR_PRINTF(3, 0) static void
+default_log_fn(struct xkb_context *ctx, enum xkb_log_level level,
+ const char *fmt, va_list args)
+{
+ const char *prefix = log_level_to_prefix(level);
+
+ if (prefix)
+ fprintf(stderr, "%s", prefix);
+ vfprintf(stderr, fmt, args);
+}
+
+static enum xkb_log_level
+log_level(const char *level) {
+ char *endptr;
+ enum xkb_log_level lvl;
+
+ errno = 0;
+ lvl = strtol(level, &endptr, 10);
+ if (errno == 0 && (endptr[0] == '\0' || is_space(endptr[0])))
+ return lvl;
+ if (istreq_prefix("crit", level))
+ return XKB_LOG_LEVEL_CRITICAL;
+ if (istreq_prefix("err", level))
+ return XKB_LOG_LEVEL_ERROR;
+ if (istreq_prefix("warn", level))
+ return XKB_LOG_LEVEL_WARNING;
+ if (istreq_prefix("info", level))
+ return XKB_LOG_LEVEL_INFO;
+ if (istreq_prefix("debug", level) || istreq_prefix("dbg", level))
+ return XKB_LOG_LEVEL_DEBUG;
+
+ return XKB_LOG_LEVEL_ERROR;
+}
+
+static int
+log_verbosity(const char *verbosity) {
+ char *endptr;
+ int v;
+
+ errno = 0;
+ v = strtol(verbosity, &endptr, 10);
+ if (errno == 0)
+ return v;
+
+ return 0;
+}
+