1 files changed, 13 insertions, 0 deletions

diff --git a/src/ccl.h b/src/ccl.h
index 86602f2a3c8..c1700c957d9 100644
--- a/src/ccl.h
+++ b/src/ccl.h
@@ -22,6 +22,14 @@ Boston, MA 02111-1307, USA.  */
 #ifndef _CCL_H
 #define _CCL_H
 
+/* Macros for exit status of CCL program.  */
+#define CCL_STAT_SUCCESS        0 /* Terminated successfully.  */
+#define CCL_STAT_SUSPEND_BY_SRC 1 /* Terminated by empty input.  */
+#define CCL_STAT_SUSPEND_BY_DST 2 /* Terminated by output buffer full.  */
+#define CCL_STAT_INVALID_CMD    3 /* Terminated because of invalid
+                                     command.  */
+#define CCL_STAT_QUIT           4 /* Terminated because of quit.  */
+
 /* Structure to hold information about running CCL code.  Read
    comments in the file ccl.c for the detail of each field.  */
 struct ccl_program {
@@ -33,6 +41,11 @@ struct ccl_program {
   int reg[8];                   /* CCL registers, reg[7] is used for
                                    condition flag of relational
                                    operations.  */
+  int private_state;            /* CCL instruction may use this
+                                   for private use, mainly for preservation
+                                   internal states for suspending.
+                                   This variable is set to 0 when ccl is 
+                                   set up.  */
   int last_block;               /* Set to 1 while processing the last
                                    block. */
   int status;                   /* Exit status of the CCL program.  */