+ int i, errors, ret = SR_OK;
+ struct sr_input_format **inputs;
+ const char *d;
+
+ sr_spew("Sanity-checking all input modules.");
+
+ inputs = sr_input_list();
+ for (i = 0; inputs[i]; i++) {
+ errors = 0;
+
+ d = (inputs[i]->id) ? inputs[i]->id : "NULL";
+
+ if (!inputs[i]->id) {
+ sr_err("No ID in module %d ('%s').", i, d);
+ errors++;
+ }
+ if (!inputs[i]->description) {
+ sr_err("No description in module %d ('%s').", i, d);
+ errors++;
+ }
+ if (!inputs[i]->format_match) {
+ sr_err("No format_match in module %d ('%s').", i, d);
+ errors++;
+ }
+ if (!inputs[i]->init) {
+ sr_err("No init in module %d ('%s').", i, d);
+ errors++;
+ }
+ if (!inputs[i]->loadfile) {
+ sr_err("No loadfile in module %d ('%s').", i, d);
+ errors++;
+ }
+
+ if (errors == 0)
+ continue;
+
+ ret = SR_ERR;
+ }
+
+ return ret;
+}
+
+/**
+ * Sanity-check all libsigrok output modules.
+ *
+ * @return SR_OK if all modules are OK, SR_ERR if one or more have issues.
+ */
+static int sanity_check_all_output_modules(void)
+{
+ int i, errors, ret = SR_OK;
+ struct sr_output_format **outputs;
+ const char *d;
+
+ sr_spew("Sanity-checking all output modules.");
+
+ outputs = sr_output_list();
+ for (i = 0; outputs[i]; i++) {
+ errors = 0;
+
+ d = (outputs[i]->id) ? outputs[i]->id : "NULL";
+
+ if (!outputs[i]->id) {
+ sr_err("No ID in module %d ('%s').", i, d);
+ errors++;
+ }
+ if (!outputs[i]->description) {
+ sr_err("No description in module %d ('%s').", i, d);
+ errors++;
+ }
+ if (outputs[i]->df_type < 10000 || outputs[i]->df_type > 10007) {
+ sr_err("Invalid df_type %d in module %d ('%s').",
+ outputs[i]->df_type, i, d);
+ errors++;
+ }
+
+ /* All modules must provide a data or recv API callback. */
+ if (!outputs[i]->data && !outputs[i]->receive) {
+ sr_err("No data/receive in module %d ('%s').", i, d);
+ errors++;
+ }
+
+ /*
+ * Currently most API calls are optional (their function
+ * pointers can thus be NULL) in theory: init, event, cleanup.
+ */
+
+ if (errors == 0)
+ continue;
+
+ ret = SR_ERR;
+ }
+
+ return ret;
+}
+
+/**
+ * Initialize libsigrok.
+ *
+ * This function must be called before any other libsigrok function.
+ *
+ * @param ctx Pointer to a libsigrok context struct pointer. Must not be NULL.
+ * This will be a pointer to a newly allocated libsigrok context
+ * object upon success, and is undefined upon errors.
+ *
+ * @return SR_OK upon success, a (negative) error code otherwise. Upon errors
+ * the 'ctx' pointer is undefined and should not be used. Upon success,
+ * the context will be free'd by sr_exit() as part of the libsigrok
+ * shutdown.
+ *
+ * @since 0.1.0 (but the API changed in 0.2.0)
+ */
+SR_API int sr_init(struct sr_context **ctx)
+{
+ int ret = SR_ERR;
+ struct sr_context *context;
+
+ if (!ctx) {
+ sr_err("%s(): libsigrok context was NULL.", __func__);
+ return SR_ERR;
+ }
+
+ if (sanity_check_all_drivers() < 0) {
+ sr_err("Internal driver error(s), aborting.");
+ return ret;
+ }
+
+ if (sanity_check_all_input_modules() < 0) {
+ sr_err("Internal input module error(s), aborting.");
+ return ret;
+ }
+
+ if (sanity_check_all_output_modules() < 0) {
+ sr_err("Internal output module error(s), aborting.");
+ return ret;
+ }
+
+ /* + 1 to handle when struct sr_context has no members. */
+ context = g_try_malloc0(sizeof(struct sr_context) + 1);
+
+ if (!context) {
+ ret = SR_ERR_MALLOC;
+ goto done;
+ }
+
+#ifdef HAVE_LIBUSB_1_0
+ ret = libusb_init(&context->libusb_ctx);
+ if (LIBUSB_SUCCESS != ret) {
+ sr_err("libusb_init() returned %s.\n", libusb_error_name(ret));
+ ret = SR_ERR;
+ goto done;
+ }
+#endif
+
+ *ctx = context;
+ context = NULL;
+ session = NULL;
+ ret = SR_OK;
+
+done:
+ if (context)
+ g_free(context);
+ return ret;