From 1b15206cf9aa7005fc3d48f78f60f66838f10eb5 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 14 Dec 1999 16:33:29 -0200
Subject: many details + code redistribution

---
 lbuiltin.c | 330 +++++++++----------------------------------------------------
 1 file changed, 48 insertions(+), 282 deletions(-)

(limited to 'lbuiltin.c')

diff --git a/lbuiltin.c b/lbuiltin.c
index 77e1bc56..a28db531 100644
--- a/lbuiltin.c
+++ b/lbuiltin.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lbuiltin.c,v 1.82 1999/12/06 11:42:18 roberto Exp roberto $
+** $Id: lbuiltin.c,v 1.83 1999/12/07 12:05:34 roberto Exp roberto $
 ** Built-in functions
 ** See Copyright Notice in lua.h
 */
@@ -29,6 +29,17 @@
 
 
 
+#ifdef DEBUG
+/*
+** function defined in ltests.c, to open some internal-test functions
+*/
+void luaB_opentests (lua_State *L);
+#else
+#define luaB_opentests(L)	/* do nothing */
+#endif
+
+
+
 /*
 ** {======================================================
 ** Auxiliary functions
@@ -87,7 +98,7 @@ static Hash *gettable (lua_State *L, int arg) {
 ** If your system does not support "stderr", redefine this function, or
 ** redefine _ERRORMESSAGE so that it won't need _ALERT.
 */
-static void luaB_alert (lua_State *L) {
+void luaB_alert (lua_State *L) {
   fputs(luaL_check_string(L, 1), stderr);
 }
 
@@ -96,7 +107,7 @@ static void luaB_alert (lua_State *L) {
 ** Standard implementation of _ERRORMESSAGE.
 ** The library "iolib" redefines _ERRORMESSAGE for better error information.
 */
-static void error_message (lua_State *L) {
+void luaB_ERRORMESSAGE (lua_State *L) {
   lua_Object al = lua_rawgetglobal(L, "_ALERT");
   if (lua_isfunction(L, al)) {  /* avoid error loop if _ALERT is not defined */
     char buff[600];
@@ -117,7 +128,7 @@ static void error_message (lua_State *L) {
 #define MAXPRINT	40  /* arbitrary limit */
 #endif
 
-static void luaB_print (lua_State *L) {
+void luaB_print (lua_State *L) {
   lua_Object args[MAXPRINT];
   lua_Object obj;
   int n = 0;
@@ -140,7 +151,7 @@ static void luaB_print (lua_State *L) {
 }
 
 
-static void luaB_tonumber (lua_State *L) {
+void luaB_tonumber (lua_State *L) {
   int base = luaL_opt_int(L, 2, 10);
   if (base == 10) {  /* standard conversion */
     lua_Object o = lua_getparam(L, 1);
@@ -161,66 +172,66 @@ static void luaB_tonumber (lua_State *L) {
 }
 
 
-static void luaB_error (lua_State *L) {
+void luaB_error (lua_State *L) {
   lua_error(L, lua_getstring(L, lua_getparam(L, 1)));
 }
 
-static void luaB_setglobal (lua_State *L) {
+void luaB_setglobal (lua_State *L) {
   const char *n = luaL_check_string(L, 1);
   lua_Object value = luaL_nonnullarg(L, 2);
   lua_pushobject(L, value);
   lua_setglobal(L, n);
 }
 
-static void luaB_rawsetglobal (lua_State *L) {
+void luaB_rawsetglobal (lua_State *L) {
   const char *n = luaL_check_string(L, 1);
   lua_Object value = luaL_nonnullarg(L, 2);
   lua_pushobject(L, value);
   lua_rawsetglobal(L, n);
 }
 
-static void luaB_getglobal (lua_State *L) {
+void luaB_getglobal (lua_State *L) {
   lua_pushobject(L, lua_getglobal(L, luaL_check_string(L, 1)));
 }
 
-static void luaB_rawgetglobal (lua_State *L) {
+void luaB_rawgetglobal (lua_State *L) {
   lua_pushobject(L, lua_rawgetglobal(L, luaL_check_string(L, 1)));
 }
 
-static void luaB_tag (lua_State *L) {
+void luaB_tag (lua_State *L) {
   lua_pushnumber(L, lua_tag(L, lua_getparam(L, 1)));
 }
 
-static void luaB_settag (lua_State *L) {
+void luaB_settag (lua_State *L) {
   lua_Object o = luaL_tablearg(L, 1);
   lua_pushobject(L, o);
   lua_settag(L, luaL_check_int(L, 2));
   lua_pushobject(L, o);  /* return first argument */
 }
 
-static void luaB_newtag (lua_State *L) {
+void luaB_newtag (lua_State *L) {
   lua_pushnumber(L, lua_newtag(L));
 }
 
-static void luaB_copytagmethods (lua_State *L) {
+void luaB_copytagmethods (lua_State *L) {
   lua_pushnumber(L, lua_copytagmethods(L, luaL_check_int(L, 1),
                                     luaL_check_int(L, 2)));
 }
 
-static void luaB_rawgettable (lua_State *L) {
+void luaB_rawgettable (lua_State *L) {
   lua_pushobject(L, luaL_nonnullarg(L, 1));
   lua_pushobject(L, luaL_nonnullarg(L, 2));
   lua_pushobject(L, lua_rawgettable(L));
 }
 
-static void luaB_rawsettable (lua_State *L) {
+void luaB_rawsettable (lua_State *L) {
   lua_pushobject(L, luaL_nonnullarg(L, 1));
   lua_pushobject(L, luaL_nonnullarg(L, 2));
   lua_pushobject(L, luaL_nonnullarg(L, 3));
   lua_rawsettable(L);
 }
 
-static void luaB_settagmethod (lua_State *L) {
+void luaB_settagmethod (lua_State *L) {
   int tag = luaL_check_int(L, 1);
   const char *event = luaL_check_string(L, 2);
   lua_Object nf = luaL_nonnullarg(L, 3);
@@ -232,23 +243,23 @@ static void luaB_settagmethod (lua_State *L) {
   lua_pushobject(L, lua_settagmethod(L, tag, event));
 }
 
-static void luaB_gettagmethod (lua_State *L) {
+void luaB_gettagmethod (lua_State *L) {
   lua_pushobject(L, lua_gettagmethod(L, luaL_check_int(L, 1),
                                         luaL_check_string(L, 2)));
 }
 
-static void luaB_seterrormethod (lua_State *L) {
+void luaB_seterrormethod (lua_State *L) {
   lua_Object nf = luaL_functionarg(L, 1);
   lua_pushobject(L, nf);
   lua_pushobject(L, lua_seterrormethod(L));
 }
 
-static void luaB_collectgarbage (lua_State *L) {
+void luaB_collectgarbage (lua_State *L) {
   lua_pushnumber(L, lua_collectgarbage(L, luaL_opt_int(L, 1, 0)));
 }
 
 
-static void luaB_type (lua_State *L) {
+void luaB_type (lua_State *L) {
   lua_Object o = luaL_nonnullarg(L, 1);
   lua_pushstring(L, lua_type(L, o));
 }
@@ -270,7 +281,7 @@ static void passresults (lua_State *L) {
     lua_pushuserdata(L, NULL);  /* at least one result to signal no errors */
 }
 
-static void luaB_dostring (lua_State *L) {
+void luaB_dostring (lua_State *L) {
   long l;
   const char *s = luaL_check_lstr(L, 1, &l);
   if (*s == ID_CHUNK)
@@ -281,7 +292,7 @@ static void luaB_dostring (lua_State *L) {
 }
 
 
-static void luaB_dofile (lua_State *L) {
+void luaB_dofile (lua_State *L) {
   const char *fname = luaL_opt_string(L, 1, NULL);
   if (lua_dofile(L, fname) == 0)
     passresults(L);
@@ -289,7 +300,7 @@ static void luaB_dofile (lua_State *L) {
 }
 
 
-static void luaB_call (lua_State *L) {
+void luaB_call (lua_State *L) {
   lua_Object f = luaL_nonnullarg(L, 1);
   const Hash *arg = gettable(L, 2);
   const char *options = luaL_opt_string(L, 3, "");
@@ -328,7 +339,7 @@ static void luaB_call (lua_State *L) {
 }
 
 
-static void luaB_nextvar (lua_State *L) {
+void luaB_nextvar (lua_State *L) {
   lua_Object o = luaL_nonnullarg(L, 1);
   TaggedString *g;
   if (ttype(o) == LUA_T_NIL)
@@ -342,7 +353,7 @@ static void luaB_nextvar (lua_State *L) {
 }
 
 
-static void luaB_next (lua_State *L) {
+void luaB_next (lua_State *L) {
   const Hash *a = gettable(L, 1);
   lua_Object k = luaL_nonnullarg(L, 2);
   int i;  /* will get first element after `i' */
@@ -357,7 +368,7 @@ static void luaB_next (lua_State *L) {
 }
 
 
-static void luaB_tostring (lua_State *L) {
+void luaB_tostring (lua_State *L) {
   lua_Object o = lua_getparam(L, 1);
   char buff[64];
   switch (ttype(o)) {
@@ -405,14 +416,14 @@ static void luaB_tostring (lua_State *L) {
 ** =======================================================
 */
 
-static void luaB_assert (lua_State *L) {
+void luaB_assert (lua_State *L) {
   lua_Object p = lua_getparam(L, 1);
   if (p == LUA_NOOBJECT || lua_isnil(L, p))
     luaL_verror(L, "assertion failed!  %.90s", luaL_opt_string(L, 2, ""));
 }
 
 
-static void luaB_foreachi (lua_State *L) {
+void luaB_foreachi (lua_State *L) {
   const Hash *t = gettable(L, 1);
   int n = (int)getnarg(L, t);
   int i;
@@ -430,7 +441,7 @@ static void luaB_foreachi (lua_State *L) {
 }
 
 
-static void luaB_foreach (lua_State *L) {
+void luaB_foreach (lua_State *L) {
   const Hash *a = gettable(L, 1);
   lua_Object f = luaL_functionarg(L, 2);
   int i;
@@ -450,7 +461,7 @@ static void luaB_foreach (lua_State *L) {
 }
 
 
-static void luaB_foreachvar (lua_State *L) {
+void luaB_foreachvar (lua_State *L) {
   lua_Object f = luaL_functionarg(L, 1);
   GlobalVar *gv;
   luaD_checkstack(L, 4);  /* for extra var name, f, var name, and globalval */
@@ -472,12 +483,12 @@ static void luaB_foreachvar (lua_State *L) {
 }
 
 
-static void luaB_getn (lua_State *L) {
+void luaB_getn (lua_State *L) {
   lua_pushnumber(L, getnarg(L, gettable(L, 1)));
 }
 
 
-static void luaB_tinsert (lua_State *L) {
+void luaB_tinsert (lua_State *L) {
   Hash *a = gettable(L, 1);
   lua_Object v = lua_getparam(L, 3);
   int n = (int)getnarg(L, a);
@@ -495,7 +506,7 @@ static void luaB_tinsert (lua_State *L) {
 }
 
 
-static void luaB_tremove (lua_State *L) {
+void luaB_tremove (lua_State *L) {
   Hash *a = gettable(L, 1);
   int n = (int)getnarg(L, a);
   int pos = luaL_opt_int(L, 2, n);
@@ -583,7 +594,7 @@ static void auxsort (lua_State *L, Hash *a, int l, int u, lua_Object f) {
   L->top--;  /* remove pivot from stack */
 }
 
-static void luaB_sort (lua_State *L) {
+void luaB_sort (lua_State *L) {
   lua_Object t = lua_getparam(L, 1);
   Hash *a = gettable(L, 1);
   int n = (int)getnarg(L, a);
@@ -601,255 +612,9 @@ static void luaB_sort (lua_State *L) {
 /* }====================================================== */
 
 
-
-#ifdef DEBUG
-/*
-** {======================================================
-** some DEBUG functions
-** (for internal debugging of the Lua implementation)
-** =======================================================
-*/
-
-static void mem_query (lua_State *L) {
-  lua_pushnumber(L, totalmem);
-  lua_pushnumber(L, numblocks);
-}
-
-
-static void hash_query (lua_State *L) {
-  lua_Object o = luaL_nonnullarg(L, 1);
-  if (lua_getparam(L, 2) == LUA_NOOBJECT) {
-    luaL_arg_check(L, ttype(o) == LUA_T_STRING, 1, "string expected");
-    lua_pushnumber(L, tsvalue(o)->hash);
-  }
-  else {
-    const Hash *t = avalue(luaL_tablearg(L, 2));
-    lua_pushnumber(L, luaH_mainposition(t, o) - t->node);
-  }
-}
-
-
-static void table_query (lua_State *L) {
-  const Hash *t = avalue(luaL_tablearg(L, 1));
-  int i = luaL_opt_int(L, 2, -1);
-  if (i == -1) {
-    lua_pushnumber(L, t->size);
-    lua_pushnumber(L, t->firstfree - t->node);
-  }
-  else if (i < t->size) {
-    luaA_pushobject(L, &t->node[i].key);
-    luaA_pushobject(L, &t->node[i].val);
-    if (t->node[i].next)
-      lua_pushnumber(L, t->node[i].next - t->node);
-  }
-}
-
-
-static void query_strings (lua_State *L) {
-  int h = luaL_check_int(L, 1) - 1;
-  int s = luaL_opt_int(L, 2, 0) - 1;
-  if (s==-1) {
-    if (h < NUM_HASHS) {
-      lua_pushnumber(L, L->string_root[h].nuse);
-      lua_pushnumber(L, L->string_root[h].size);
-    }
-  }
-  else {
-    TaggedString *ts = L->string_root[h].hash[s];
-    for (ts = L->string_root[h].hash[s]; ts; ts = ts->nexthash) {
-      if (ts->constindex == -1) lua_pushstring(L, "<USERDATA>");
-      else lua_pushstring(L, ts->str);
-    }
-  }
-}
-
-
-static const char *delimits = " \t\n,;";
-
-static void skip (const char **pc) {
-  while (**pc != '\0' && strchr(delimits, **pc)) (*pc)++;
-}
-
-static int getnum (const char **pc) {
-  int res = 0;
-  skip(pc);
-  while (isdigit(**pc)) res = res*10 + (*(*pc)++) - '0';
-  return res;
-}
-  
-static int getreg (lua_State *L, const char **pc) {
-  skip(pc);
-  if (*(*pc)++ != 'r') lua_error(L, "`testC' expecting a register");
-  return getnum(pc);
-}
-
-static const char *getname (const char **pc) {
-  static char buff[30];
-  int i = 0;
-  skip(pc);
-  while (**pc != '\0' && !strchr(delimits, **pc))
-    buff[i++] = *(*pc)++;
-  buff[i] = '\0';
-  return buff;
-}
-
-
-#define EQ(s1)	(strcmp(s1, inst) == 0)
-
-static void testC (lua_State *L) {
-  lua_Object reg[10];
-  const char *pc = luaL_check_string(L, 1);
-  for (;;) {
-    const char *inst = getname(&pc);
-    if EQ("") return;
-    else if EQ("pushnum") {
-      lua_pushnumber(L, getnum(&pc));
-    }
-    else if EQ("createtable") {
-      reg[getreg(L, &pc)] = lua_createtable(L);
-    }
-    else if EQ("closure") {
-      lua_CFunction f = lua_getcfunction(L, lua_getglobal(L, getname(&pc)));
-      lua_pushcclosure(L, f, getnum(&pc));
-    }
-    else if EQ("pop") {
-      reg[getreg(L, &pc)] = lua_pop(L);
-    }
-    else if EQ("getglobal") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_getglobal(L, getname(&pc));
-    }
-    else if EQ("rawgetglobal") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_rawgetglobal(L, getname(&pc));
-    }
-    else if EQ("ref") {
-      lua_pushnumber(L, lua_ref(L, 0));
-      reg[getreg(L, &pc)] = lua_pop(L);
-    }
-    else if EQ("reflock") {
-      lua_pushnumber(L, lua_ref(L, 1));
-      reg[getreg(L, &pc)] = lua_pop(L);
-    }
-    else if EQ("getref") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_getref(L, (int)lua_getnumber(L, reg[getreg(L, &pc)]));
-    }
-    else if EQ("unref") {
-      lua_unref(L, (int)lua_getnumber(L, reg[getreg(L, &pc)]));
-    }
-    else if EQ("getparam") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_getparam(L, getnum(&pc)+1);  /* skips the commmand itself */
-    }
-    else if EQ("getresult") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_getparam(L, getnum(&pc));
-    }
-    else if EQ("setglobal") {
-      lua_setglobal(L, getname(&pc));
-    }
-    else if EQ("rawsetglobal") {
-      lua_rawsetglobal(L, getname(&pc));
-    }
-    else if EQ("pushstring") {
-      lua_pushstring(L, getname(&pc));
-    }
-    else if EQ("pushreg") {
-      lua_pushobject(L, reg[getreg(L, &pc)]);
-    }
-    else if EQ("call") {
-      lua_call(L, getname(&pc));
-    }
-    else if EQ("gettable") {
-      reg[getreg(L, &pc)] = lua_gettable(L);
-    }
-    else if EQ("rawgettable") {
-      reg[getreg(L, &pc)] = lua_rawgettable(L);
-    }
-    else if EQ("settable") {
-      lua_settable(L);
-    }
-    else if EQ("rawsettable") {
-      lua_rawsettable(L);
-    }
-    else if EQ("nextvar") {
-      lua_pushstring(L, lua_nextvar(L, lua_getstring(L, reg[getreg(L, &pc)])));
-    }
-    else if EQ("next") {
-      int n = getreg(L, &pc);
-      n = lua_next(L, reg[n], (int)lua_getnumber(L, reg[getreg(L, &pc)]));
-      lua_pushnumber(L, n);
-    }
-    else if EQ("equal") {
-      int n1 = getreg(L, &pc);
-      int n2 = getreg(L, &pc);
-      lua_pushnumber(L, lua_equal(L, reg[n1], reg[n2]));
-    }
-    else if EQ("pushusertag") {
-      int val = getreg(L, &pc);
-      int tag = getreg(L, &pc);
-      lua_pushusertag(L, (void *)(int)lua_getnumber(L, reg[val]),
-                         (int)lua_getnumber(L, reg[tag]));
-    }
-    else if EQ("udataval") {
-      int n = getreg(L, &pc);
-      lua_pushnumber(L, (int)lua_getuserdata(L, reg[getreg(L, &pc)]));
-      reg[n] = lua_pop(L);
-    }
-    else if EQ("settagmethod") {
-      int n = getreg(L, &pc);
-      lua_settagmethod(L, (int)lua_getnumber(L, reg[n]), getname(&pc));
-    }
-    else if EQ("beginblock") {
-      lua_beginblock(L);
-    }
-    else if EQ("endblock") {
-      lua_endblock(L);
-    }
-    else if EQ("newstate") {
-      int stacksize = getnum(&pc);
-      lua_State *L1 = lua_newstate("stack", stacksize,
-                                   "builtin", getnum(&pc), NULL);
-      lua_pushuserdata(L, L1);
-    }
-    else if EQ("closestate") {
-      lua_close(lua_getuserdata(L, reg[getreg(L, &pc)]));
-    }
-    else if EQ("doremote") {
-      lua_Object ol1 = reg[getreg(L, &pc)];
-      lua_Object str = reg[getreg(L, &pc)];
-      lua_State *L1;
-      lua_Object temp;
-      int i;
-      if (!lua_isuserdata(L, ol1) || !lua_isstring(L, str))
-        lua_error(L, "bad arguments for `doremote'");
-      L1 = lua_getuserdata(L, ol1);
-      lua_dostring(L1, lua_getstring(L, str));
-      i = 1;
-      while ((temp = lua_getresult(L1, i++)) != LUA_NOOBJECT)
-        lua_pushstring(L, lua_getstring(L1, temp));
-    }
-    else luaL_verror(L, "unknown command in `testC': %.20s", inst);
-  }
-}
-                
-
-/* }====================================================== */
-#endif
-
-
-
 static const struct luaL_reg builtin_funcs[] = {
-#ifdef DEBUG
-  {"hash", hash_query},
-  {"querystr", query_strings},
-  {"querytab", table_query},
-  {"testC", testC},
-  {"totalmem", mem_query},
-#endif
   {"_ALERT", luaB_alert},
-  {"_ERRORMESSAGE", error_message},
+  {"_ERRORMESSAGE", luaB_ERRORMESSAGE},
   {"call", luaB_call},
   {"collectgarbage", luaB_collectgarbage},
   {"copytagmethods", luaB_copytagmethods},
@@ -891,6 +656,7 @@ void luaB_predefine (lua_State *L) {
   luaS_newfixedstring(L, tableEM);
   luaS_newfixedstring(L, memEM);
   luaL_openl(L, builtin_funcs);
+  luaB_opentests(L);  /* internal test functions (when DEBUG is on) */
   lua_pushstring(L, LUA_VERSION);
   lua_setglobal(L, "_VERSION");
 }
-- 
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