hook variables are global, no more "lua_set...hook" functions.

luadebug.h

@@ -2,7 +2,7 @@
 ** LUA - Linguagem para Usuarios de Aplicacao
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** $Id: luadebug.h,v 1.4 1996/02/07 18:10:27 roberto Exp roberto $
+** $Id: luadebug.h,v 1.5 1996/02/08 17:03:20 roberto Exp roberto $
 */
 
 
@@ -20,12 +20,12 @@ lua_Function lua_stackedfunction (int level);
 void lua_funcinfo (lua_Object func, char **filename, int *linedefined);
 int lua_currentline (lua_Function func);
 char *lua_getobjname (lua_Object o, char **name);
-lua_LHFunction lua_setlinehook (lua_LHFunction hook);
-lua_CHFunction lua_setcallhook (lua_CHFunction hook);
 
 lua_Object lua_getlocal (lua_Function func, int local_number, char **name);
 int lua_setlocal (lua_Function func, int local_number);
 
+extern lua_LHFunction lua_linehook;
+extern lua_CHFunction lua_callhook;
 extern int lua_debug;
 
 #endif

manual.tex

@@ -1,4 +1,4 @@
-% $Id: manual.tex,v 1.12 1996/03/14 17:45:01 roberto Exp roberto $
+% $Id: manual.tex,v 1.13 1996/03/19 22:39:07 roberto Exp roberto $
 
 \documentstyle[A4,11pt,bnf]{article}
 
@@ -34,7 +34,7 @@ Waldemar Celes Filho
 \tecgraf\ --- Departamento de Inform\'atica --- PUC-Rio
 }
 
-\date{\small \verb$Date: 1996/03/14 17:45:01 $}
+\date{\small \verb$Date: 1996/03/19 22:39:07 $}
 
 \maketitle
 
@@ -810,7 +810,7 @@ int            lua_isuserdata           (lua_Object object);
 \end{verbatim}
 All macros return 1 if the object is compatible with the given type,
 and 0 otherwise.
-\verb'lua_isnumber' accepts numbers and numerical strings,
+The function \verb'lua_isnumber' accepts numbers and numerical strings,
 \verb'lua_isstring' accepts strings and numbers (\see{coercion}),
 and \verb'lua_isfunction' accepts Lua and C functions.
 
@@ -1587,7 +1587,10 @@ this function fails and returns 0.
 The Lua interpreter offers two hooks for debug purposes:
 \begin{verbatim}
 typedef void (*lua_CHFunction) (lua_Function func, char *file, int line);
+extern lua_CHFunction lua_callhook;
+
 typedef void (*lua_LHFunction) (int line);
+extern lua_LHFunction lua_linehook;
 \end{verbatim}
 The first one is called whenever the interpreter enters or leaves a
 function.
@@ -1606,12 +1609,8 @@ Its only parameter is the line number
 This second hook is only called if the active function
 has been pre-compiled with debug information (\see{pragma}).
 
-To set these hooks, there are the functions:
-\begin{verbatim}
-lua_LHFunction lua_setlinehook (lua_LHFunction hook);
-lua_CHFunction lua_setcallhook (lua_CHFunction hook);
-\end{verbatim}
-Both return the previous hook.
+A hook is disabled when its value is NULL (0),
+which is the initial value of both hooks.
 
 
 \section{Some Examples}

opcode.c

@@ -3,7 +3,7 @@
 ** TecCGraf - PUC-Rio
 */
 
-char *rcs_opcode="$Id: opcode.c,v 3.61 1996/03/19 16:50:24 roberto Exp roberto $";
+char *rcs_opcode="$Id: opcode.c,v 3.62 1996/03/19 22:28:37 roberto Exp roberto $";
 
 #include <setjmp.h>
 #include <stdio.h>
@@ -54,8 +54,8 @@ static  jmp_buf *errorJmp = NULL; /* current error recover point */
 
 
 /* Hooks */
-static lua_LHFunction line_hook = NULL;
-static lua_CHFunction call_hook = NULL;
+lua_LHFunction lua_linehook = NULL;
+lua_CHFunction lua_callhook = NULL;
 
 
 static StkId lua_execute (Byte *pc, StkId base);
@@ -69,24 +69,6 @@ Object *luaI_Address (lua_Object o)
 }
 
 
-/*
-** Functions to change hook functions.
-*/
-lua_LHFunction lua_setlinehook (lua_LHFunction hook)
-{
-  lua_LHFunction temp = line_hook;
-  line_hook = hook;
-  return temp;
-}
-
-lua_CHFunction lua_setcallhook (lua_CHFunction hook)
-{
-  lua_CHFunction temp = call_hook;
-  call_hook = hook;
-  return temp;
-}
-
-
 /*
 ** Init stack
 */
@@ -212,7 +194,7 @@ static void lineHook (int line)
   int oldCnResults = CnResults;
   StkId old_top = CBase = top-stack;
   CnResults = 0;
-  (*line_hook)(line);
+  (*lua_linehook)(line);
   top = stack+old_top;
   CnResults = oldCnResults;
   CBase = oldBase;
@@ -230,14 +212,14 @@ static void callHook (StkId base, lua_Type type, int isreturn)
   StkId old_top = CBase = top-stack;
   CnResults = 0;
   if (isreturn)
-    (*call_hook)(LUA_NOOBJECT, "(return)", 0);
+    (*lua_callhook)(LUA_NOOBJECT, "(return)", 0);
   else
   {
     Object *f = stack+base-1;
     if (type == LUA_T_MARK)
-      (*call_hook)(Ref(f), f->value.tf->fileName, f->value.tf->lineDefined);
+      (*lua_callhook)(Ref(f), f->value.tf->fileName, f->value.tf->lineDefined);
     else
-      (*call_hook)(Ref(f), "(C)", -1);
+      (*lua_callhook)(Ref(f), "(C)", -1);
   }
   top = stack+old_top;
   CnResults = oldCnResults;
@@ -258,10 +240,10 @@ static StkId callC (lua_CFunction func, StkId base)
   CnResults = (top-stack) - base;
   /* incorporate parameters on the stack */
   CBase = base+CnResults;  /* == top-stack */
-  if (call_hook)
+  if (lua_callhook)
     callHook(base, LUA_T_CMARK, 0);
   (*func)();
-  if (call_hook)  /* func may have changed call_hook */
+  if (lua_callhook)  /* func may have changed lua_callhook */
     callHook(base, LUA_T_CMARK, 1);
   firstResult = CBase;
   CBase = oldBase;
@@ -899,7 +881,7 @@ static void comparison (lua_Type tag_less, lua_Type tag_equal,
 */
 static StkId lua_execute (Byte *pc, StkId base)
 {
-  if (call_hook)
+  if (lua_callhook)
     callHook (base, LUA_T_MARK, 0);
  while (1)
  {
@@ -1261,7 +1243,7 @@ static StkId lua_execute (Byte *pc, StkId base)
 
    case RETCODE0:
    case RETCODE:
-     if (call_hook)
+     if (lua_callhook)
        callHook (base, LUA_T_MARK, 1);
      return (base + ((opcode==RETCODE0) ? 0 : *pc));
 
@@ -1277,7 +1259,7 @@ static StkId lua_execute (Byte *pc, StkId base)
       (stack+base-1)->tag = LUA_T_LINE;
     }
     (stack+base-1)->value.i = code.w;
-    if (line_hook)
+    if (lua_linehook)
       lineHook (code.w);
     break;
    }