2 files changed, 15 insertions, 16 deletions
diff --git a/src/llex.js b/src/llex.js
index 4c2be8c..c110a7a 100644
--- a/src/llex.js
+++ b/src/llex.js
@@ -320,10 +320,7 @@ const read_long_string = function(ls, seminfo, sep) {
             case char['\n']: case char['\r']: {
                 save(ls, char['\n']);
                 inclinenumber(ls);
-                if (!seminfo) {
-                    ls.buff.n = 0;
-                    ls.buff.buffer = [];
-                }
+                if (!seminfo) lzio.luaZ_resetbuffer(ls.buff);
                 break;
             }
             default: {
@@ -468,9 +465,7 @@ const isreserved = function(w) {
 };
 
 const llex = function(ls, seminfo) {
-    ls.buff.n = 0;
-    ls.buff.buffer = [];
-
+    lzio.luaZ_resetbuffer(ls.buff);
     for (;;) {
         assert(typeof ls.current == "number");
         switch (ls.current) {
@@ -489,12 +484,10 @@ const llex = function(ls, seminfo) {
                 next(ls);
                 if (ls.current === char['[']) {  /* long comment? */
                     let sep = skip_sep(ls);
-                    ls.buff.n = 0;  /* 'skip_sep' may dirty the buffer */
-                    ls.buff.buffer = [];
+                    lzio.luaZ_resetbuffer(ls.buff);  /* 'skip_sep' may dirty the buffer */
                     if (sep >= 0) {
                         read_long_string(ls, null, sep);  /* skip long comment */
-                        ls.buff.n = 0;  /* previous call may dirty the buff. */
-                        ls.buff.buffer = [];
+                        lzio.luaZ_resetbuffer(ls.buff);  /* previous call may dirty the buff. */
                         break;
                     }
                 }
diff --git a/src/lzio.js b/src/lzio.js
index 919ed44..72969d4 100644
--- a/src/lzio.js
+++ b/src/lzio.js
@@ -10,6 +10,11 @@ class MBuffer {
     }
 }
 
+const luaZ_resetbuffer = function(buff) {
+    buff.n = 0;
+    buff.buffer = [];
+};
+
 class ZIO {
     constructor(L, reader, data) {
         this.L = L;           /* Lua state (for reader) */
@@ -74,8 +79,9 @@ const luaZ_read = function(z, b, b_offset, n) {
     return 0;
 };
 
-module.exports.EOZ       = EOZ;
-module.exports.luaZ_fill = luaZ_fill;
-module.exports.luaZ_read = luaZ_read;
-module.exports.MBuffer   = MBuffer;
-module.exports.ZIO       = ZIO;
+module.exports.EOZ              = EOZ;
+module.exports.luaZ_fill        = luaZ_fill;
+module.exports.luaZ_read        = luaZ_read;
+module.exports.luaZ_resetbuffer = luaZ_resetbuffer;
+module.exports.MBuffer          = MBuffer;
+module.exports.ZIO              = ZIO;