Text mode: allow disabling text mode to reduce code size

Kconfig.thingset

@@ -12,6 +12,16 @@ config THINGSET
 
 if THINGSET
 
+config THINGSET_TEXT_MODE
+	bool "Enable text mode (JSON)"
+	default y
+	help
+	  Whether to enable text mode (JSON). It may be desirable to disable this
+	  to reduce code size in certain circumstances.
+
+	  Please note that text mode may also be required for the ThingSet shell
+	  in some applications, so one should be careful when disabling it.
+
 config THINGSET_IMMUTABLE_OBJECTS
 	bool "Make data objects immutable and store them in ROM"
 	default n

src/CMakeLists.txt

@@ -6,4 +6,6 @@ zephyr_library_named("thingset")
 target_sources(thingset PRIVATE thingset.c)
 target_sources(thingset PRIVATE thingset_bin.c)
 target_sources(thingset PRIVATE thingset_common.c)
-target_sources(thingset PRIVATE thingset_txt.c)
+if(DEFINED CONFIG_THINGSET_TEXT_MODE)
+    target_sources(thingset PRIVATE thingset_txt.c)
+endif()

src/thingset.c

@@ -118,7 +118,7 @@ int thingset_process_message(struct thingset_context *ts, const uint8_t *msg, si
     ts->rsp_size = rsp_size;
     ts->rsp_pos = 0;
 
-    if (ts->msg[0] >= 0x20) {
+    if (IS_ENABLED(CONFIG_THINGSET_TEXT_MODE) && ts->msg[0] >= 0x20) {
         ret = thingset_txt_process(ts);
     }
     else {
@@ -447,9 +447,11 @@ int thingset_report_path(struct thingset_context *ts, char *buf, size_t buf_size
     }
 
     switch (format) {
+#ifdef CONFIG_THINGSET_TEXT_MODE
         case THINGSET_TXT_NAMES_VALUES:
             thingset_txt_setup(ts);
             break;
+#endif
         case THINGSET_BIN_IDS_VALUES:
             ts->endpoint.use_ids = true;
             thingset_bin_setup(ts, 1);