[babl] babl-cache: incorporate BABL_PATH_LENGTH in header

[Øyvind Kolås <ok src gnome org>]

commit 3418e4201183ba507a2a4c4124d2fdd2f5213240
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed Nov 23 11:36:28 2016 +0100

    babl-cache: incorporate BABL_PATH_LENGTH in header

 babl/babl-cache.c     |    8 ++++----
 babl/babl-fish-path.c |    5 +++++
 babl/babl-internal.h  |    1 +
 3 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/babl/babl-cache.c b/babl/babl-cache.c
index e32e585..8d5ed61 100644
--- a/babl/babl-cache.c
+++ b/babl/babl-cache.c
@@ -142,8 +142,8 @@ void babl_store_db (void)
   FILE *dbfile = fopen (fish_cache_path (), "w");
   if (!dbfile)
     return;
-  fprintf (dbfile, "#%s BABL_TOLERANCE=%f\n",
-           BABL_GIT_VERSION, _babl_legal_error ());
+  fprintf (dbfile, "#%s BABL_PATH_LENGTH=%d BABL_TOLERANCE=%f\n",
+           BABL_GIT_VERSION, _babl_max_path_len (), _babl_legal_error ());
 
   /* sort the list of fishes by usage, making next run more efficient -
    * and the data easier to approach as data for targeted optimization
@@ -256,8 +256,8 @@ void babl_init_db (void)
           /* if babl has changed in git .. drop whole cache */
           {
             char buf[2048];
-            sprintf (buf, "#%s BABL_TOLERANCE=%f",
-                     BABL_GIT_VERSION, _babl_legal_error ());
+            sprintf (buf, "#%s BABL_PATH_LENGTH=%d BABL_TOLERANCE=%f",
+               BABL_GIT_VERSION, _babl_max_path_len (), _babl_legal_error ());
             if (strcmp ( token, buf))
             {
               free (contents);
diff --git a/babl/babl-fish-path.c b/babl/babl-fish-path.c
index cbe9618..f4df8cf 100644
--- a/babl/babl-fish-path.c
+++ b/babl/babl-fish-path.c
@@ -145,6 +145,11 @@ static int max_path_length (void)
   return max_length;
 }
 
+int _babl_max_path_len (void)
+{
+  return max_path_length ();
+}
+
 /* The task of BablFishPath construction is to compute
  * the shortest path in a graph where formats are the vertices
  * and conversions are the edges. However, there is an additional
diff --git a/babl/babl-internal.h b/babl/babl-internal.h
index 992a770..228faa5 100644
--- a/babl/babl-internal.h
+++ b/babl/babl-internal.h
@@ -319,5 +319,6 @@ static inline double babl_parse_double (const char *str)
 double _babl_legal_error (void);
 void babl_init_db (void);
 void babl_store_db (void);
+int _babl_max_path_len (void);
 
 #endif