From 40589f25f90c4863cfe2787b72629aa0a8cda082 Mon Sep 17 00:00:00 2001
From: Uwe Hermann <uwe@hermann-uwe.de>
Date: Thu, 25 Aug 2016 22:22:07 +0200
Subject: [PATCH] Factor out srd_decoder_apiver().

---
 decoder.c                  | 31 +++++++++++++++++++++++++------
 libsigrokdecode-internal.h |  3 +++
 2 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/decoder.c b/decoder.c
index 748280a..25ca476 100644
--- a/decoder.c
+++ b/decoder.c
@@ -586,6 +586,29 @@ static int check_method(PyObject *py_dec, const char *mod_name,
 	return SRD_OK;
 }
 
+/**
+ * Get the API version of the specified decoder.
+ *
+ * @param d The decoder to use. Must not be NULL.
+ *
+ * @return The API version of the decoder, or 0 upon errors.
+ */
+SRD_PRIV long srd_decoder_apiver(const struct srd_decoder *d)
+{
+	PyObject *py_apiver;
+	long apiver;
+
+	if (!d)
+		return 0;
+
+	py_apiver = PyObject_GetAttrString(d->py_dec, "api_version");
+	apiver = (py_apiver && PyLong_Check(py_apiver))
+			? PyLong_AsLong(py_apiver) : 0;
+	Py_XDECREF(py_apiver);
+
+	return apiver;
+}
+
 /**
  * Load a protocol decoder module into the embedded Python interpreter.
  *
@@ -597,7 +620,7 @@ static int check_method(PyObject *py_dec, const char *mod_name,
  */
 SRD_API int srd_decoder_load(const char *module_name)
 {
-	PyObject *py_basedec, *py_apiver;
+	PyObject *py_basedec;
 	struct srd_decoder *d;
 	long apiver;
 	int is_subclass;
@@ -648,11 +671,7 @@ SRD_API int srd_decoder_load(const char *module_name)
 	 * Check that this decoder has the correct PD API version.
 	 * PDs of different API versions are incompatible and cannot work.
 	 */
-	py_apiver = PyObject_GetAttrString(d->py_dec, "api_version");
-	apiver = (py_apiver && PyLong_Check(py_apiver))
-			? PyLong_AsLong(py_apiver) : 0;
-	Py_XDECREF(py_apiver);
-
+	apiver = srd_decoder_apiver(d);
 	if (apiver != 2) {
 		srd_exception_catch("Only PDs of API version 2 are supported");
 		goto err_out;
diff --git a/libsigrokdecode-internal.h b/libsigrokdecode-internal.h
index d32414a..8259b97 100644
--- a/libsigrokdecode-internal.h
+++ b/libsigrokdecode-internal.h
@@ -86,6 +86,9 @@ SRD_PRIV int srd_log(int loglevel, const char *format, ...) G_GNUC_PRINTF(2, 3);
 #define srd_warn(...)	srd_log(SRD_LOG_WARN, __VA_ARGS__)
 #define srd_err(...)	srd_log(SRD_LOG_ERR,  __VA_ARGS__)
 
+/* decoder.c */
+SRD_PRIV long srd_decoder_apiver(const struct srd_decoder *d);
+
 /* type_decoder.c */
 SRD_PRIV PyObject *srd_Decoder_type_new(void);
 
-- 
2.30.2