commit 9be6932: [Minor] Allow to index lua text

[Vsevolod Stakhov]

Author: Vsevolod Stakhov
Date: 2019-09-07 13:35:19 +0100
URL: https://github.com/rspamd/rspamd/commit/9be69321212f756a97643e417bf9ed563823f1b4

[Minor] Allow to index lua text

---
 src/lua/lua_text.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/lua/lua_text.c b/src/lua/lua_text.c
index a41775230..e095b8c43 100644
--- a/src/lua/lua_text.c
+++ b/src/lua/lua_text.c
@@ -74,6 +74,13 @@ LUA_FUNCTION_DEF (text, save_in_file);
  * @return {rspamd_text} new rspamd_text with span (must be careful when using with owned texts...)
  */
 LUA_FUNCTION_DEF (text, span);
+/***
+ * @method rspamd_text:at(pos)
+ * Returns a byte at the position `pos`
+ * @param {integer} pos index
+ * @return {integer} byte at the position `pos` or nil if pos out of bound
+ */
+LUA_FUNCTION_DEF (text, at);
 LUA_FUNCTION_DEF (text, take_ownership);
 LUA_FUNCTION_DEF (text, gc);
 LUA_FUNCTION_DEF (text, eq);
@@ -341,6 +348,28 @@ lua_text_span (lua_State *L)
 	return 1;
 }
 
+static gint
+lua_text_at (lua_State *L)
+{
+	LUA_TRACE_POINT;
+	struct rspamd_lua_text *t = lua_check_text (L, 1);
+	gint pos = lua_tointeger (L, 2);
+
+	if (t) {
+		if (pos > 0 && pos <= t->len) {
+			lua_pushinteger (L, t->start[pos - 1]);
+		}
+		else {
+			lua_pushnil (L);
+		}
+	}
+	else {
+		return luaL_error (L, "invalid arguments");
+	}
+
+	return 1;
+}
+
 static gint
 lua_text_save_in_file (lua_State *L)
 {