audio_format: add function attributes

src/audio_check.h

@@ -28,6 +28,7 @@
 /**
  * The GLib quark used for errors reported by this library.
  */
+G_GNUC_CONST
 static inline GQuark
 audio_format_quark(void)
 {

src/audio_format.h

@@ -20,6 +20,7 @@
 #ifndef MPD_AUDIO_FORMAT_H
 #define MPD_AUDIO_FORMAT_H
 
+#include <glib.h>
 #include <stdint.h>
 #include <stdbool.h>
 #include <assert.h>
@@ -189,6 +190,7 @@ audio_valid_channel_count(unsigned channels)
  * Returns false if the format is not valid for playback with MPD.
  * This function performs some basic validity checks.
  */
+G_GNUC_PURE
 static inline bool audio_format_valid(const struct audio_format *af)
 {
 	return audio_valid_sample_rate(af->sample_rate) &&
@@ -200,6 +202,7 @@ static inline bool audio_format_valid(const struct audio_format *af)
  * Returns false if the format mask is not valid for playback with
  * MPD.  This function performs some basic validity checks.
  */
+G_GNUC_PURE
 static inline bool audio_format_mask_valid(const struct audio_format *af)
 {
 	return (af->sample_rate == 0 ||
@@ -237,6 +240,7 @@ audio_format_mask_apply(struct audio_format *af,
 	assert(audio_format_valid(af));
 }
 
+G_GNUC_CONST
 static inline unsigned
 sample_format_size(enum sample_format format)
 {
@@ -265,6 +269,7 @@ sample_format_size(enum sample_format format)
 /**
  * Returns the size of each (mono) sample in bytes.
  */
+G_GNUC_PURE
 static inline unsigned audio_format_sample_size(const struct audio_format *af)
 {
 	return sample_format_size((enum sample_format)af->format);
@@ -273,6 +278,7 @@ static inline unsigned audio_format_sample_size(const struct audio_format *af)
 /**
  * Returns the size of each full frame in bytes.
  */
+G_GNUC_PURE
 static inline unsigned
 audio_format_frame_size(const struct audio_format *af)
 {
@@ -283,6 +289,7 @@ audio_format_frame_size(const struct audio_format *af)
  * Returns the floating point factor which converts a time span to a
  * storage size in bytes.
  */
+G_GNUC_PURE
 static inline double audio_format_time_to_size(const struct audio_format *af)
 {
 	return af->sample_rate * audio_format_frame_size(af);
@@ -295,6 +302,7 @@ static inline double audio_format_time_to_size(const struct audio_format *af)
  * @param format a #sample_format enum value
  * @return the string
  */
+G_GNUC_PURE G_GNUC_MALLOC
 const char *
 sample_format_to_string(enum sample_format format);
 
@@ -306,6 +314,7 @@ sample_format_to_string(enum sample_format format);
  * @param s a buffer to print into
  * @return the string, or NULL if the #audio_format object is invalid
  */
+G_GNUC_PURE G_GNUC_MALLOC
 const char *
 audio_format_to_string(const struct audio_format *af,
 		       struct audio_format_string *s);