lua

commit 53db607963177fb91e566f4790f15e3fbcbdad61
parent cbf0c7a103bd69a2b8d8a55f676cf7bb08058909
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date:   Fri,  6 Feb 2009 16:38:23 -0200

avoid using 'fputs' in 'print' to avoid problems with embedded zeros

Diffstat:
M
lbaselib.c
 | 
18
++++++++++++------

1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/lbaselib.c b/lbaselib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lbaselib.c,v 1.207 2008/07/03 14:23:35 roberto Exp roberto $
+** $Id: lbaselib.c,v 1.208 2008/07/11 17:51:01 roberto Exp roberto $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
@@ -24,27 +24,33 @@
 /*
 ** If your system does not support `stdout', you can just remove this function.
 ** If you need, you can define your own `print' function, following this
-** model but changing `fputs' to put the strings at a proper place
+** model but changing `writestring' to put the strings at a proper place
 ** (a console window or a log file, for instance).
 */
+static void writestring (const char *s, size_t l) {
+  fwrite(s, sizeof(char), l, stdout);
+}
+
+
 static int luaB_print (lua_State *L) {
   int n = lua_gettop(L);  /* number of arguments */
   int i;
   lua_getglobal(L, "tostring");
   for (i=1; i<=n; i++) {
     const char *s;
+    size_t l;
     lua_pushvalue(L, -1);  /* function to be called */
     lua_pushvalue(L, i);   /* value to print */
     lua_call(L, 1, 1);
-    s = lua_tostring(L, -1);  /* get result */
+    s = lua_tolstring(L, -1, &l);  /* get result */
     if (s == NULL)
       return luaL_error(L, LUA_QL("tostring") " must return a string to "
                            LUA_QL("print"));
-    if (i>1) fputs("\t", stdout);
-    fputs(s, stdout);
+    if (i>1) writestring("\t", 1);
+    writestring(s, l);
     lua_pop(L, 1);  /* pop result */
   }
-  fputs("\n", stdout);
+  writestring("\n", 1);
   return 0;
 }