decoder: don't break error messages, factor out Python variable name

Don't break long error messages in source code, so that developers can
grep for user reported strings during maintenance. This commit does not
change behaviour.

Concentrate repeated references to the 'annotation_rows' Python variable
name in a single spot at the top of the helper routine.

1 files changed, 14 insertions, 16 deletions

diff --git a/decoder.c b/decoder.c
index 0d266d4..3e04722 100644
--- a/decoder.c
+++ b/decoder.c
@@ -413,8 +413,8 @@ static int get_annotations(struct srd_decoder *dec)
 		goto except_out;
 
 	if (!PyTuple_Check(py_annlist)) {
-		srd_err("Protocol decoder %s annotations should "
-			"be a tuple.", dec->name);
+		srd_err("Protocol decoder %s annotations should be a tuple.",
+			dec->name);
 		goto err_out;
 	}
 
@@ -424,8 +424,7 @@ static int get_annotations(struct srd_decoder *dec)
 			goto except_out;
 
 		if (!PyTuple_Check(py_ann) || PyTuple_Size(py_ann) != 2) {
-			srd_err("Protocol decoder %s annotation %zd should "
-				"be a tuple with two elements.",
+			srd_err("Protocol decoder %s annotation %zd should be a tuple with two elements.",
 				dec->name, i + 1);
 			goto err_out;
 		}
@@ -454,6 +453,8 @@ err_out:
 /* Convert annotation_rows to GSList of 'struct srd_decoder_annotation_row'. */
 static int get_annotation_rows(struct srd_decoder *dec)
 {
+	const char *py_member_name = "annotation_rows";
+
 	PyObject *py_ann_rows, *py_ann_row, *py_ann_classes, *py_item;
 	GSList *annotation_rows;
 	struct srd_decoder_annotation_row *ann_row;
@@ -463,20 +464,20 @@ static int get_annotation_rows(struct srd_decoder *dec)
 
 	gstate = PyGILState_Ensure();
 
-	if (!PyObject_HasAttrString(dec->py_dec, "annotation_rows")) {
+	if (!PyObject_HasAttrString(dec->py_dec, py_member_name)) {
 		PyGILState_Release(gstate);
 		return SRD_OK;
 	}
 
 	annotation_rows = NULL;
 
-	py_ann_rows = PyObject_GetAttrString(dec->py_dec, "annotation_rows");
+	py_ann_rows = PyObject_GetAttrString(dec->py_dec, py_member_name);
 	if (!py_ann_rows)
 		goto except_out;
 
 	if (!PyTuple_Check(py_ann_rows)) {
-		srd_err("Protocol decoder %s annotation_rows "
-			"must be a tuple.", dec->name);
+		srd_err("Protocol decoder %s %s must be a tuple.",
+			dec->name, py_member_name);
 		goto err_out;
 	}
 
@@ -486,9 +487,8 @@ static int get_annotation_rows(struct srd_decoder *dec)
 			goto except_out;
 
 		if (!PyTuple_Check(py_ann_row) || PyTuple_Size(py_ann_row) != 3) {
-			srd_err("Protocol decoder %s annotation_rows "
-				"must contain only tuples of 3 elements.",
-				dec->name);
+			srd_err("Protocol decoder %s %s must contain only tuples of 3 elements.",
+				dec->name, py_member_name);
 			goto err_out;
 		}
 		ann_row = g_malloc0(sizeof(struct srd_decoder_annotation_row));
@@ -512,9 +512,8 @@ static int get_annotation_rows(struct srd_decoder *dec)
 			goto except_out;
 
 		if (!PyTuple_Check(py_ann_classes)) {
-			srd_err("Protocol decoder %s annotation_rows tuples "
-				"must have a tuple of numbers as 3rd element.",
-				dec->name);
+			srd_err("Protocol decoder %s %s tuples must have a tuple of numbers as 3rd element.",
+				dec->name, py_member_name);
 			goto err_out;
 		}
 
@@ -524,8 +523,7 @@ static int get_annotation_rows(struct srd_decoder *dec)
 				goto except_out;
 
 			if (!PyLong_Check(py_item)) {
-				srd_err("Protocol decoder %s annotation row "
-					"class tuple must only contain numbers.",
+				srd_err("Protocol decoder %s annotation row class tuple must only contain numbers.",
 					dec->name);
 				goto err_out;
 			}