[sourcegen] Add remaining functions

interfaces/sourcegen/sourcegen/_data/ctkin_auto.yaml

@@ -16,7 +16,6 @@ recipes:
   what: constructor  # registers object in CLib storage
 - name: nPhases
 - name: phase
-  implements: Kinetics::thermo
   uses: nPhases
   what: constructor  # registers object in CLib storage
 - name: phaseIndex

interfaces/sourcegen/sourcegen/clib/_CLibSourceGenerator.py

@@ -90,8 +90,8 @@ class CLibSourceGenerator(SourceGenerator):
             if ret_type == "char*":
                 # string expressions require special handling
                 returns = Param(
-                    "int", "", "Actual length of string including \\0 "
-                    "or -1 for exception handling.")
+                    "int", "", "Actual length of string including string-terminating "
+                    "null byte, \\0, or -1 for exception handling.")
                 buffer = [
                     Param("int", "bufLen", "Length of reserved array.", "in"),
                     Param(ret_type, "buf", "Returned string value.", "out")]

interfaces/sourcegen/sourcegen/clib/config.yaml

@@ -3,13 +3,13 @@
 # This file is part of Cantera. See License.txt in the top-level directory or
 # at https://cantera.org/license.txt for license and copyright information.
 
-# Ignore these files entirely:
+# List of files to ignore entirely:
 ignore_files: []
 
-# Ignore these specific functions:
+# Dictionary of file names and list of functions to ignore.
+# Example: ctkin_auto.yaml: [phase]
 ignore_funcs:
   ct_auto.yaml: [setLogWriter, setLogCallback]
-  ctkin_auto.yaml: [phase]
 
 # Cabinets with associated includes
 includes: