Change lfta code generation form C to C++

[com/gs-lite.git] / cfg / external_fcns.def

diff --git a/cfg/external_fcns.def b/cfg/external_fcns.def
index 951ce35..f8afc61 100644 (file)
--- a/cfg/external_fcns.def
+++ b/cfg/external_fcns.def
@@ -454,10 +454,16 @@ uint FUN [LFTA_LEGAL, COST EXPENSIVE]
   
 
 ///////////////////////////////////////////////////////////
-//         Truncating strings        
+//         Truncating strings and substrings
 ///////////////////////////////////////////////////////////
        
+// str_truncate(str, n) : return the 1st n chars of str, or as much as possible
         string FUN [LFTA_LEGAL,PARTIAL,COST FREE] str_truncate (string, uint);
+// str_suffix(str, n) : return the last n chars of str, or as much as possible
+        string FUN [LFTA_LEGAL,PARTIAL,COST FREE] str_suffix (string, uint);
+// get_list_entry(list_str, sep_str, i) : split the list by sep,
+//             return the i-th value, if it exists.
+        string FUN [LFTA_LEGAL,PARTIAL,COST FREE] get_list_entry (string, string, uint CONST);
 
 
 ///////////////////////////////////////////////////////////
@@ -508,6 +514,8 @@ uint FUN [LFTA_LEGAL, COST EXPENSIVE]
        llong FUN [LFTA_LEGAL,COST FREE]LLONG(llong);
        llong FUN [LFTA_LEGAL,COST FREE]LLONG(float);
 
+       llong FUN [LFTA_LEGAL,COST LOW] to_llong(string);
+
 ///////////////////////////////////////////////////////////
 //          Numeric functions
 ///////////////////////////////////////////////////////////
@@ -543,6 +551,13 @@ uint FUN [LFTA_LEGAL, COST EXPENSIVE]
        IP FUN [LFTA_LEGAL,COST LOW] strtoip_c(string HANDLE); 
 
 
+/////////////////////////////////////////////////////////////
+//     Add up uints in a delimited ascii list.
+//     return 135 on '34|45|56' and sep '|'
+
+       llong FUN [LFTA_LEGAL,COST LOW] sum_uint_in_list(string, string CONST);
+
+
 ///////////////////////////////////////////////////////////
 //          Compute running sum
 ///////////////////////////////////////////////////////////
@@ -753,3 +768,18 @@ uint FUN [LFTA_LEGAL, COST EXPENSIVE]
 //     to_hex_string : allow printing of binary strings
 
        string FUN [HFTA_ONLY, COST EXPENSIVE] to_hex_string(string);
+
+// -------------------------------------------------------------------
+//     approx_count_distinct : approximate the count distinct by
+//     taking minhashes.  accurate to 7%, tested up to 100M distinct
+//     items.
+//
+//     TODO : allow running aggregates to be used in regular aggregation?
+
+       float EXTR approx_count_distinct approx_count_distinct_udaf extr_approx_count_distinct(string);
+       string UDAF approx_count_distinct_udaf fstring1000 (string);
+       float FUN extr_approx_count_distinct(string);
+
+       float EXTR running_approx_count_distinct running_approx_count_distinct_udaf extr_approx_count_distinct(string);
+       string UDAF [RUNNING] running_approx_count_distinct_udaf fstring1000 (string);
+       float FUN extr_approx_count_distinct(string);