Add xkb_log_level enum rather than using syslog

Instead of relying on people including syslog.h, add our own
XKB_LOG_LEVEL_* defines.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>

6 files changed, 59 insertions, 40 deletions

diff --git a/src/context.c b/src/context.c
index 864c6de..942fcc2 100644
--- a/src/context.c
+++ b/src/context.c
@@ -30,7 +30,6 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <unistd.h>
-#include <syslog.h>
 
 #include "xkb-priv.h"
 #include "atom.h"
@@ -180,18 +179,16 @@ static const char *
 priority_to_prefix(int priority)
 {
     switch (priority) {
-    case LOG_DEBUG:
+    case XKB_LOG_LEVEL_DEBUG:
         return "Debug:";
-    case LOG_INFO:
+    case XKB_LOG_LEVEL_INFO:
         return "Info:";
-    case LOG_WARNING:
+    case XKB_LOG_LEVEL_WARNING:
         return "Warning:";
-    case LOG_ERR:
+    case XKB_LOG_LEVEL_ERROR:
         return "Error:";
-    case LOG_CRIT:
-    case LOG_ALERT:
-    case LOG_EMERG:
-        return "Internal error:";
+    case XKB_LOG_LEVEL_CRITICAL:
+        return "Internal error (critical):";
     default:
         return NULL;
     }
@@ -218,15 +215,15 @@ log_priority(const char *priority) {
     if (errno == 0 && (endptr[0] == '\0' || isspace(endptr[0])))
         return prio;
     if (strncasecmp(priority, "err", 3) == 0)
-        return LOG_ERR;
+        return XKB_LOG_LEVEL_ERROR;
     if (strncasecmp(priority, "warn", 4) == 0)
-        return LOG_WARNING;
+        return XKB_LOG_LEVEL_WARNING;
     if (strncasecmp(priority, "info", 4) == 0)
-        return LOG_INFO;
+        return XKB_LOG_LEVEL_INFO;
     if (strncasecmp(priority, "debug", 5) == 0)
-        return LOG_DEBUG;
+        return XKB_LOG_LEVEL_DEBUG;
 
-    return LOG_ERR;
+    return XKB_LOG_LEVEL_ERROR;
 }
 
 static int
@@ -256,7 +253,7 @@ xkb_context_new(enum xkb_context_flags flags)
 
     ctx->refcnt = 1;
     ctx->log_fn = default_log_fn;
-    ctx->log_priority = LOG_ERR;
+    ctx->log_priority = XKB_LOG_LEVEL_ERROR;
     ctx->log_verbosity = 0;
 
     /* Environment overwrites defaults. */
@@ -327,14 +324,14 @@ xkb_set_log_fn(struct xkb_context *ctx,
     ctx->log_fn = (log_fn ? log_fn : default_log_fn);
 }
 
-XKB_EXPORT int
+XKB_EXPORT enum xkb_log_level
 xkb_get_log_priority(struct xkb_context *ctx)
 {
     return ctx->log_priority;
 }
 
 XKB_EXPORT void
-xkb_set_log_priority(struct xkb_context *ctx, int priority)
+xkb_set_log_priority(struct xkb_context *ctx, enum xkb_log_level priority)
 {
     ctx->log_priority = priority;
 }
diff --git a/src/xkb-priv.h b/src/xkb-priv.h
index 42b7fa1..68bbcb9 100644
--- a/src/xkb-priv.h
+++ b/src/xkb-priv.h
@@ -82,7 +82,6 @@
 #include <stdbool.h>
 #include <string.h>
 #include <strings.h>
-#include <syslog.h>
 #include <X11/extensions/XKB.h>
 
 #include "xkbcommon/xkbcommon.h"
@@ -115,7 +114,7 @@ struct xkb_context {
 
     ATTR_PRINTF(3, 0) void (*log_fn)(struct xkb_context *ctx, int priority,
                                      const char *fmt, va_list args);
-    int log_priority;
+    enum xkb_log_level log_priority;
     int log_verbosity;
     void *user_data;
 
@@ -549,12 +548,17 @@ xkb_log(struct xkb_context *ctx, int priority, const char *fmt, ...);
  * format is supplied without arguments. Not supplying it would still
  * result in an error, though.
  */
-#define log_dbg(ctx, ...) xkb_log_cond((ctx), LOG_DEBUG, __VA_ARGS__)
-#define log_info(ctx, ...) xkb_log_cond((ctx), LOG_INFO, __VA_ARGS__)
-#define log_warn(ctx, ...) xkb_log_cond((ctx), LOG_WARNING, __VA_ARGS__)
-#define log_err(ctx, ...) xkb_log_cond((ctx), LOG_ERR, __VA_ARGS__)
-#define log_wsgo(ctx, ...) xkb_log_cond((ctx), LOG_CRIT, __VA_ARGS__)
+#define log_dbg(ctx, ...) \
+    xkb_log_cond((ctx), XKB_LOG_LEVEL_DEBUG, __VA_ARGS__)
+#define log_info(ctx, ...) \
+    xkb_log_cond((ctx), XKB_LOG_LEVEL_INFO, __VA_ARGS__)
+#define log_warn(ctx, ...) \
+    xkb_log_cond((ctx), XKB_LOG_LEVEL_WARNING, __VA_ARGS__)
+#define log_err(ctx, ...) \
+    xkb_log_cond((ctx), XKB_LOG_LEVEL_ERROR, __VA_ARGS__)
+#define log_wsgo(ctx, ...) \
+    xkb_log_cond((ctx), XKB_LOG_LEVEL_CRITICAL, __VA_ARGS__)
 #define log_lvl(ctx, lvl, ...) \
-    xkb_log_cond_lvl((ctx), LOG_WARNING, (lvl), __VA_ARGS__)
+    xkb_log_cond_lvl((ctx), XKB_LOG_LEVEL_WARNING, (lvl), __VA_ARGS__)
 
 #endif /* XKB_PRIV_H */
diff --git a/test/common.c b/test/common.c
index c1f9786..2d49824 100644
--- a/test/common.c
+++ b/test/common.c
@@ -35,7 +35,6 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <sys/syslog.h>
 
 #include "xkbcommon/xkbcommon.h"
 #include "test.h"
@@ -102,7 +101,7 @@ test_get_context(void)
 
     xkb_context_include_path_append(ctx, test_get_path(""));
 
-    xkb_set_log_priority(ctx, LOG_DEBUG);
+    xkb_set_log_priority(ctx, XKB_LOG_LEVEL_DEBUG);
     xkb_set_log_verbosity(ctx, 101);
 
     return ctx;
diff --git a/test/log.c b/test/log.c
index d030ff7..f3e7cee 100644
--- a/test/log.c
+++ b/test/log.c
@@ -25,7 +25,6 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <syslog.h>
 
 #include "test.h"
 #include "xkb-priv.h"
@@ -36,13 +35,13 @@ static const char *
 priority_to_string(int priority)
 {
     switch (priority) {
-    case LOG_ERR:
+    case XKB_LOG_LEVEL_ERROR:
         return "error";
-    case LOG_WARNING:
+    case XKB_LOG_LEVEL_WARNING:
         return "warning";
-    case LOG_INFO:
+    case XKB_LOG_LEVEL_INFO:
         return "info";
-    case LOG_DEBUG:
+    case XKB_LOG_LEVEL_DEBUG:
         return "debug";
     }
 
@@ -89,7 +88,7 @@ main(void)
     log_err(ctx, "first error: %lu\n", 115415UL);
     log_lvl(ctx, 5, "first verbose 5\n");
 
-    xkb_set_log_priority(ctx, LOG_DEBUG);
+    xkb_set_log_priority(ctx, XKB_LOG_LEVEL_DEBUG);
     log_warn(ctx, "second warning: %d\n", 87);
     log_dbg(ctx, "second debug: %s %s\n", "hello", "world");
     log_info(ctx, "second info\n");
@@ -97,7 +96,7 @@ main(void)
     log_lvl(ctx, 6, "second verbose 6\n");
 
     xkb_set_log_verbosity(ctx, 0);
-    xkb_set_log_priority(ctx, -1);
+    xkb_set_log_priority(ctx, XKB_LOG_LEVEL_CRITICAL);
     log_warn(ctx, "third warning: %d\n", 87);
     log_dbg(ctx, "third debug: %s %s\n", "hello", "world");
     log_info(ctx, "third info\n");
diff --git a/test/rulescomp.c b/test/rulescomp.c
index 8eb9464..bed0bb5 100644
--- a/test/rulescomp.c
+++ b/test/rulescomp.c
@@ -70,13 +70,21 @@ static void
 benchmark(struct xkb_context *context)
 {
     struct timespec start, stop, elapsed;
+    enum xkb_log_level old_prio = xkb_get_log_priority(context);
+    int old_verb = xkb_get_log_verbosity(context);
     int i;
 
+    xkb_set_log_priority(context, XKB_LOG_LEVEL_CRITICAL);
+    xkb_set_log_verbosity(context, 0);
+
     clock_gettime(CLOCK_MONOTONIC, &start);
     for (i = 0; i < BENCHMARK_ITERATIONS; i++)
         assert(test_rmlvo_silent(context, "evdev",       "",       "us",  "",      ""));
     clock_gettime(CLOCK_MONOTONIC, &stop);
 
+    xkb_set_log_priority(context, old_prio);
+    xkb_set_log_verbosity(context, old_verb);
+
     elapsed.tv_sec = stop.tv_sec - start.tv_sec;
     elapsed.tv_nsec = stop.tv_nsec - start.tv_nsec;
     if (elapsed.tv_nsec < 0) {
diff --git a/xkbcommon/xkbcommon.h b/xkbcommon/xkbcommon.h
index 58e4183..6afe5e1 100644
--- a/xkbcommon/xkbcommon.h
+++ b/xkbcommon/xkbcommon.h
@@ -256,6 +256,19 @@ xkb_context_unref(struct xkb_context *context);
  * @{
  */
 
+enum xkb_log_level {
+    /** Log critical internal errors only */
+    XKB_LOG_LEVEL_CRITICAL = 0,
+    /** Log all errors */
+    XKB_LOG_LEVEL_ERROR = 1,
+    /** Log warnings and errors */
+    XKB_LOG_LEVEL_WARNING = 2,
+    /** Log information, warnings, and errors */
+    XKB_LOG_LEVEL_INFO = 3,
+    /** Log all the things */
+    XKB_LOG_LEVEL_DEBUG = 4,
+};
+
 /**
  * Sets the function to be called for logging messages.
  * Passing NULL restores the default function, which logs to stderr.
@@ -266,20 +279,18 @@ xkb_set_log_fn(struct xkb_context *context,
                               const char *format, va_list args));
 /**
  * Sets the current logging priority. The value controls which messages
- * are logged.
+ * are logged.  The default priority is LOG_ERR.
  *
- * The value should be one of LOG_ERR, LOG_WARNING, LOG_DEBUG, etc., see
- * syslog(3) or syslog.h.  The default priority is LOG_ERR.
  * The environment variable XKB_LOG, if set, overrides the default value
  * and may be specified as a priority number or name.
  */
 void
-xkb_set_log_priority(struct xkb_context *context, int priority);
+xkb_set_log_priority(struct xkb_context *context, enum xkb_log_level priority);
 
 /**
  * Returns the current logging priority.
  */
-int
+enum xkb_log_level
 xkb_get_log_priority(struct xkb_context *context);
 
 /**
@@ -291,7 +302,8 @@ xkb_get_log_priority(struct xkb_context *context);
  * The environment variable XKB_VERBOSITY, if set, overrdies the default
  * value.
  *
- * Note that most verbose messages are of priority LOG_WARNING or lower.
+ * Note that most verbose messages are of priority XKB_LOG_LEVEL_WARNING
+ * or lower.
  */
 void
 xkb_set_log_verbosity(struct xkb_context *ctx, int verbosity);