1 files changed, 38 insertions, 0 deletions
diff --git a/native/jni/src/defines.h b/native/jni/src/defines.h
index 6ef9f414b..eb59744f6 100644
--- a/native/jni/src/defines.h
+++ b/native/jni/src/defines.h
@@ -379,6 +379,15 @@ static inline void prof_out(void) {
 #error "BIGRAM_FILTER_MODULO is larger than BIGRAM_FILTER_BYTE_SIZE"
 #endif
 
+// Max number of bigram maps (previous word contexts) to be cached. Increasing this number could
+// improve bigram lookup speed for multi-word suggestions, but at the cost of more memory usage.
+// Also, there are diminishing returns since the most frequently used bigrams are typically near
+// the beginning of the input and are thus the first ones to be cached. Note that these bigrams
+// are reset for each new composing word.
+#define MAX_CACHED_PREV_WORDS_IN_BIGRAM_MAP 25
+// Most common previous word contexts currently have 100 bigrams
+#define DEFAULT_HASH_MAP_SIZE_FOR_EACH_BIGRAM_MAP 100
+
 template<typename T> AK_FORCE_INLINE const T &min(const T &a, const T &b) { return a < b ? a : b; }
 template<typename T> AK_FORCE_INLINE const T &max(const T &a, const T &b) { return a > b ? a : b; }
 
@@ -417,16 +426,45 @@ typedef enum {
 } DoubleLetterLevel;
 
 typedef enum {
+    // Correction for MATCH_CHAR
     CT_MATCH,
+    // Correction for PROXIMITY_CHAR
     CT_PROXIMITY,
+    // Correction for ADDITIONAL_PROXIMITY_CHAR
     CT_ADDITIONAL_PROXIMITY,
+    // Correction for SUBSTITUTION_CHAR
     CT_SUBSTITUTION,
+    // Skip one omitted letter
     CT_OMISSION,
+    // Delete an unnecessarily inserted letter
     CT_INSERTION,
+    // Swap the order of next two touch points
     CT_TRANSPOSITION,
     CT_COMPLETION,
     CT_TERMINAL,
+    // Create new word with space omission
     CT_NEW_WORD_SPACE_OMITTION,
+    // Create new word with space substitution
     CT_NEW_WORD_SPACE_SUBSTITUTION,
 } CorrectionType;
+
+// ErrorType is mainly decided by CorrectionType but it is also depending on if
+// the correction has really been performed or not.
+typedef enum {
+    // Substitution, omission and transposition
+    ET_EDIT_CORRECTION,
+    // Proximity error
+    ET_PROXIMITY_CORRECTION,
+    // Completion
+    ET_COMPLETION,
+    // New word
+    // TODO: Remove.
+    // A new word error should be an edit correction error or a proximity correction error.
+    ET_NEW_WORD,
+    // Treat error as an intentional omission when the CorrectionType is omission and the node can
+    // be intentional omission.
+    ET_INTENTIONAL_OMISSION,
+    // Not treated as an error. Tracked for checking exact match
+    ET_NOT_AN_ERROR
+} ErrorType;
 #endif // LATINIME_DEFINES_H