Refactor field names

1 files changed, 12 insertions, 11 deletions

diff --git a/regint.h b/regint.h
index 12b5d5c70a..e1e48c0951 100644
--- a/regint.h
+++ b/regint.h
@@ -45,8 +45,8 @@
 #define USE_CACHE_MATCH_OPT
 
 #ifdef USE_CACHE_MATCH_OPT
-#  define NUM_CACHE_OPCODE_FAIL -1
-#  define NUM_CACHE_OPCODE_UNINIT -2
+#  define NUM_CACHE_INDEX_FAIL -1
+#  define NUM_CACHE_INDEX_UNINIT -2
 #endif
 
 #if defined(ONIG_DEBUG_PARSE_TREE) || defined(ONIG_DEBUG_MATCH) || \
@@ -874,10 +874,11 @@ typedef struct _OnigStackType {
 
 #ifdef USE_CACHE_MATCH_OPT
 typedef struct {
-  UChar *addr;
-  int num;
-  int outer_repeat;
+  UChar* addr;         /* pointer to corresponding opcode. */
+  int    point;        /* cache point number (in outer repeat if `outer_repeat != -1`) */
+  int    outer_repeat; /* outer repeat index number */
 } OnigCacheIndex;
+#define NO_OUTER_REPEAT -1
 #endif
 
 typedef struct {
@@ -903,12 +904,12 @@ typedef struct {
   uint64_t end_time;
 #endif
 #ifdef USE_CACHE_MATCH_OPT
-  int              num_fail;
-  int              enable_cache_match_opt;
-  int              num_cache_opcode;
-  int              num_cache_table;
-  OnigCacheIndex *cache_index_table;
-  uint8_t        *match_cache;
+  int             num_fail;         /* counter of failure (backtrack) number for switching cache optimization. */
+  int             num_cache_point;  /* number of cache point in program */
+  int             num_cache_index;  /* size of cache index array */
+  int             enable_cache_opt; /* whether cache optimization is enabled */
+  OnigCacheIndex* cache_index;      /* cache index array for computing cache point number */
+  uint8_t*        cache;            /* bit array for cache optimization */
 #endif
 } OnigMatchArg;