diff --git a/src/base/cptr.c b/src/base/cptr.c
index 0086edd..f098fdc 100644
--- a/src/base/cptr.c
+++ b/src/base/cptr.c
@@ -48,6 +48,19 @@ bool cptr_endsWith(char* ptr, char* fragment){
     return true;
 }
 
+uint32 cptr_indexOf(char* ptr, char* fragment){
+    char sc=*ptr;
+    for(int si=0, fi=0; sc!=0; si++){
+        sc=ptr[si];
+        if(sc==fragment[fi]){
+            fi++;
+            if(fragment[fi]==0)
+                return si-fi+1;
+        }
+    }
+    return -1;
+}
+
 void memcopy(void* from, void* to, uint32 size){
     if(from==NULL || to==NULL)
         throw(ERR_NULLPTR);
diff --git a/src/base/cptr.h b/src/base/cptr.h
index bcf3252..255ee0a 100644
--- a/src/base/cptr.h
+++ b/src/base/cptr.h
@@ -22,6 +22,17 @@ bool cptr_startsWith(char* ptr, char* fragment);
 
 bool cptr_endsWith(char* ptr, char* fragment);
 
+/// @brief search for <fragment> in <ptr>
+/// @return index of first <fragment> inclusion or -1 if not found
+uint32 cptr_indexOf(char* ptr, char* fragment);
+
+static inline bool cptr_contains(char* ptr, char* fragment){
+    // if(cptr_indexOf(ptr, fragment)==-1)
+    //     return false;
+    // return true;
+    return cptr_indexOf(ptr, fragment) +1;
+}
+
 void memcopy(void* from, void* to, uint32 size);
 
 char* __cptr_concat(uint16 n, ...);