add fuzzy search

source/libs/index/inc/indexFstRegex.h

@@ -63,6 +63,10 @@ typedef struct {
 
 FstRegex *regexCreate(const char *str);
 
+uint32_t regexAutomStart(FstRegex *regex);
+bool     regexAutomIsMatch(FstRegex *regex, uint32_t state);
+bool     regexAutomCanMatch(FstRegex *regex, uint32_t state, bool null);
+bool     regexAutomAccept(FstRegex *regex, uint32_t state, uint8_t byte, uint32_t *result);
 // void regexSetup(FstRegex *regex, uint32_t size, const char *str);
 
 // uint32_t regexStart()

source/libs/index/src/indexFstRegex.c

@@ -35,3 +35,27 @@ FstRegex *regexCreate(const char *str) {
   regex->dfa = dfaBuilderBuild(builder);
   return regex;
 }
+
+uint32_t regexAutomStart(FstRegex *regex) {
+  ///// no nothing
+  return 0;
+}
+bool regexAutomIsMatch(FstRegex *regex, uint32_t state) {
+  if (regex->dfa != NULL && dfaIsMatch(regex->dfa, state)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool regexAutomCanMatch(FstRegex *regex, uint32_t state, bool null) {
+  // make frame happy
+  return null;
+}
+
+bool regexAutomAccept(FstRegex *regex, uint32_t state, uint8_t byte, uint32_t *result) {
+  if (regex->dfa == NULL) {
+    return false;
+  }
+  return dfaAccept(regex->dfa, state, byte, result);
+}