rust/ffi: move build_slice macro to ffi crate

Ticket: 7666

examples/plugins/altemplate/src/template.rs

@@ -32,8 +32,8 @@ use suricata::applayer::{
 };
 use suricata::applayer::{AppLayerResultRust, StreamSliceRust};
 use suricata::conf::conf_get;
-use suricata::{build_slice, export_state_data_get, export_tx_data_get};
-use suricata_ffi::{cast_pointer, SCLogError, SCLogNotice, IPPROTO_TCP};
+use suricata::{export_state_data_get, export_tx_data_get};
+use suricata_ffi::{build_slice, cast_pointer, SCLogError, SCLogNotice, IPPROTO_TCP};
 use suricata_sys::sys::AppProtoEnum::ALPROTO_UNKNOWN;
 use suricata_sys::sys::{
     AppLayerParser, AppLayerParserState, AppLayerProtocolDetect, AppLayerResult, AppLayerStateData,

rust/ffi/src/lib.rs

@@ -32,3 +32,13 @@ macro_rules! cast_pointer {
         &mut *($ptr as *mut $ty)
     };
 }
+
+/// Create a slice, given a buffer and a length
+///
+/// UNSAFE !
+#[macro_export]
+macro_rules! build_slice {
+    ($buf:ident, $len:expr) => {
+        std::slice::from_raw_parts($buf, $len)
+    };
+}

rust/src/applayer.rs

@@ -332,14 +332,6 @@ pub struct RustParser {
     pub get_state_name_by_id: Option<GetStateNameById>,
 }
 
-/// Create a slice, given a buffer and a length
-///
-/// UNSAFE !
-#[macro_export]
-macro_rules! build_slice {
-    ($buf:ident, $len:expr) => ( std::slice::from_raw_parts($buf, $len) );
-}
-
 pub trait AppLayerGetFileStateRust {
     fn err() -> Self;
 }

rust/src/common.rs

@@ -17,7 +17,6 @@
 
 //! Utility library module for commonly used strings, hexadecimals and other elements.
 
-use super::build_slice;
 use crate::jsonbuilder::HEX;
 use std::ffi::CString;
 use std::os::raw::c_char;