1 files changed, 68 insertions, 0 deletions
diff --git a/include/gram_index_engine.h b/include/gram_index_engine.h
new file mode 100644
index 0000000..a69e924
--- /dev/null
+++ b/include/gram_index_engine.h
@@ -0,0 +1,68 @@
+#ifndef _GRAM_INDEX_ENGINE_
+#define _GRAM_INDEX_ENGINE_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define GIE_INSERT_OPT 0
+#define GIE_DELETE_OPT 1
+#define GIE_INPUT_FORMAT_SFH 1
+#define GIE_INPUT_FORMAT_PLAIN 0
+
+
+typedef struct 
+{
+	/* data */
+}GIE_handle_t;
+
+
+typedef struct 
+{
+	unsigned int id;
+	unsigned int sfh_length;//size of fuzzy_hash
+	short operation;//GIE_INSERT_OPT or GIE_DELETE_OPT.if operation is GIE_DELETE_OPT, only id is needed;
+	short cfds_lvl;
+	char * sfh;
+	void * tag;
+}GIE_digest_t;
+
+
+typedef struct 
+{
+	unsigned int id;
+	short cfds_lvl;
+	void * tag;
+}GIE_result_t;
+
+
+typedef struct 
+{
+	unsigned int gram_value;
+	//unsigned int htable_num;
+	unsigned int position_accuracy;
+	short format; //if format==GIE_INPUT_FORMAT_SFH, means the input string is a GIE_INPUT_FORMAT_SFH string 
+	                //else id format==PALIN, means the input string is common string
+	short ED_reexamine;//if ED_reexamine==1, calculate edit distance to verify the final result
+}GIE_create_para_t;
+
+
+GIE_handle_t * GIE_create(const GIE_create_para_t * para);
+
+
+int GIE_update(GIE_handle_t * handle, GIE_digest_t ** digests, int size);
+
+
+//return actual matched result count
+//return 0 when matched nothing;
+//return -1 when error occurs;
+int GIE_query(GIE_handle_t * handle, const char * data, int data_len, GIE_result_t * results, int result_size);
+
+void GIE_destory(GIE_handle_t * handle);
+int GIE_string_similiarity(const char *str1, int len1, const char *str2, int len2);
+int GIE_sfh_similiarity(const char *sfh1, int len1, const char *sfh2, int len2);
+
+#ifdef __cplusplus
+}
+#endif
+#endif