Use sensible values for start/end line/columns for empty entries in the sarif 'region' structure.

sarif_cli/__init__.py

@@ -4,6 +4,21 @@ MIN_PYTHON = (3, 7)
 if sys.version_info < MIN_PYTHON:
     sys.exit("Python %s.%s or later is required.\n" % MIN_PYTHON)
 
+def lineinfo(region):
+    """ Return sensible values for start/end line/columns for the possibly empty
+    entries in the sarif 'region' structure.
+    """
+    startLine, startColumn, endLine, endColumn = map(
+        lambda e: region.get(e, -1), ['startLine', 'startColumn', 'endLine', 'endColumn'])
+    # Full information is startLine / startColumn / endLine / endcolumn
+    # - only have startLine / startColumn / _ / endcolumn
+    if endLine == -1: endLine = startLine 
+
+    # - only have startLine / _ / _ / endcolumn
+    if startColumn == -1: startColumn = 1 
+
+    return startLine, startColumn, endLine, endColumn
+
 def indices(sarif_struct, *path):
     """ Return a range for the indices of PATH """
     return range(0, len(get(sarif_struct, *path)))
@@ -18,5 +33,4 @@ def get(sarif_struct, *path):
 def msg(message):
     """ Print message to stdout """
     sys.stdout.write(message)
-    sys.stdout.write('\n')