safe the type convertion

binding/c/xdb_searcher.c

@@ -74,8 +74,8 @@ XDB_PUBLIC(int) xdb_search(xdb_searcher_t *xdb, unsigned int ip, char *region_bu
     xdb->io_count = 0;
 
     // locate the segment index block based on the vector index
-    il0 = (ip >> 24) & 0xFF;
-    il1 = (ip >> 16) & 0xFF;
+    il0 = ((int) (ip >> 24)) & 0xFF;
+    il1 = ((int) (ip >> 16)) & 0xFF;
     idx = il0 * xdb_vector_index_cols * xdb_vector_index_size + il1 * xdb_vector_index_size;
     if (xdb->vector_index != NULL) {
         s_ptr = get_unsigned_int(xdb->vector_index, idx);
@@ -96,7 +96,7 @@ XDB_PUBLIC(int) xdb_search(xdb_searcher_t *xdb, unsigned int ip, char *region_bu
     // printf("s_ptr=%u, e_ptr=%u\n", s_ptr, e_ptr);
     // binary search to get the final region info
     data_len = 0, data_ptr = 0;
-    l = 0, h = (e_ptr - s_ptr) / xdb_segment_index_size;
+    l = 0, h = ((int) (e_ptr - s_ptr)) / xdb_segment_index_size;
     while (l <= h) {
         m = (l + h) >> 1;
         p = s_ptr + m * xdb_segment_index_size;
@@ -284,7 +284,7 @@ XDB_PUBLIC(unsigned int) get_unsigned_int(const char *buffer, int offset) {
 }
 
 // get unsigned short (2bytes) from a specified buffer start from the specified offset
-XDB_PUBLIC(unsigned int) get_unsigned_short(const char *buffer, int offset) {
+XDB_PUBLIC(int) get_unsigned_short(const char *buffer, int offset) {
     return (
         ((buffer[offset  ]) & 0x000000FF) |
         ((buffer[offset+1] << 8) & 0x0000FF00)

binding/c/xdb_searcher.h

@@ -23,14 +23,6 @@
 #   define XDB_LINUX
 #endif
 
-// memory allocation error
-#define XDB_ALLOCATE_ERROR(func, bytes)    \
-do { \
-    printf("<XDB>: Allocate Error In Function <%s> For %lu Bytes.\n", func, (unsigned long int) bytes);    \
-    return NULL; \
-} while (0);
-
-
 #define xdb_calloc( _blocks, _bytes )  calloc( _blocks, _bytes )
 #define xdb_malloc( _bytes )           malloc( _bytes )
 #define xdb_free( _ptr )               free( _ptr )
@@ -112,7 +104,7 @@ XDB_PUBLIC(char *) xdb_load_content_from_file(char *);
 XDB_PUBLIC(unsigned int) get_unsigned_int(const char *, int);
 
 // get unsigned short (2bytes) from a specified buffer start from the specified offset with little-endian
-XDB_PUBLIC(unsigned int) get_unsigned_short(const char *, int);
+XDB_PUBLIC(int) get_unsigned_short(const char *, int);
 
 // check the specified string ip and convert it to an unsigned int
 XDB_PUBLIC(int) check_ip(const char *, unsigned int *);