[babl] babl: use an existing const char ptr for encoding in format

[Øyvind "pippin" Kolås <ok src gnome org>]

commit cda014b14f64783b6df3880e6be2f66f8dabdc7a
Author: Øyvind Kolås <pippin gimp org>
Date:   Fri Jul 20 16:27:55 2018 +0200

    babl: use an existing const char ptr for encoding in format

 babl/babl-format.c | 38 ++++++++++++--------------------------
 babl/babl-format.h |  1 +
 babl/babl.h        |  2 +-
 3 files changed, 14 insertions(+), 27 deletions(-)
---
diff --git a/babl/babl-format.c b/babl/babl-format.c
index 51e5458..7b81cae 100644
--- a/babl/babl-format.c
+++ b/babl/babl-format.c
@@ -143,11 +143,12 @@ format_new_from_format_with_space (const Babl *format, const Babl *space)
 
   ret = format_new (new_name,
                     0,
-                    format->format.planar, format->format.components, 
+                    format->format.planar, format->format.components,
                     (void*)babl_remodel_with_space (BABL(format->format.model), space),
                     space,
                     format->format.component, format->format.sampling, (void*)format->format.type);
 
+  ret->format.encoding = babl_get_name(format);
   babl_db_insert (db, (void*)ret);
   return ret;
 }
@@ -713,38 +714,23 @@ BABL_CLASS_IMPLEMENT (format)
 const char *
 babl_format_get_encoding (const Babl *babl)
 {
-  static char ret[256];
-  const char *name = babl_get_name (babl);
-  strcpy (&ret[0], name);
-  if (babl_format_get_space (babl) != babl_space ("sRGB"))
-    {
-
-      if (strstr (ret, "-space"))
-        *strstr (ret, "-space") = '\0';
-
-      name = &ret[0];
-    }
-  return name;
+  if (!babl) return NULL;
+  if (babl->format.encoding) return babl->format.encoding;
+  return babl_get_name (babl);
 }
 
 const Babl *
-babl_format_with_space (const char *name, const Babl *space)
+babl_format_with_space (const char *encoding, const Babl *space)
 {
-  char tmpname[256]="";
-  const Babl *example_format = (void*) name;
-  if (!name) return NULL;
+  const Babl *example_format = (void*) encoding;
+  if (!encoding) return NULL;
 
   if (BABL_IS_BABL (example_format))
   {
-    name = babl_get_name (example_format);
+    encoding = babl_get_name (example_format);
     if (babl_format_get_space (example_format) != babl_space ("sRGB"))
     {
-      strcpy (&tmpname[0], name);
-
-      if (strstr (tmpname, "-space"))
-        *strstr (tmpname, "-space") = '\0';
-
-      name = &tmpname[0];
+      encoding = babl_format_get_encoding (example_format);
     }
   }
 
@@ -764,9 +750,9 @@ babl_format_with_space (const char *name, const Babl *space)
     return NULL;
   }
   if (space == babl_space("sRGB"))
-    return babl_format (name);
+    return babl_format (encoding);
 
-  return format_new_from_format_with_space (babl_format (name), space);
+  return format_new_from_format_with_space (babl_format (encoding), space);
 }
 
 int
diff --git a/babl/babl-format.h b/babl/babl-format.h
index ddf7861..b3a4643 100644
--- a/babl/babl-format.h
+++ b/babl/babl-format.h
@@ -43,6 +43,7 @@ typedef struct
                                for conversion paths */
   int              format_n; /* whether the format is a format_n type or not */
   int              palette;
+  const char      *encoding;
 } BablFormat;
 
 #endif
diff --git a/babl/babl.h b/babl/babl.h
index 12b09c1..e0fd9e5 100644
--- a/babl/babl.h
+++ b/babl/babl.h
@@ -181,7 +181,7 @@ int babl_format_exists              (const char *name);
  * the unsuffixed version is used. If a format is passed in as space
  * the space of the format is used.
  */
-const Babl * babl_format_with_space (const char *name, const Babl *space);
+const Babl * babl_format_with_space (const char *encoding, const Babl *space);
 
 const Babl *
 babl_model_with_space (const char *name, const Babl *space);