From 7a35f23c1688e3e24781c780e121bbdc0e4b53e1 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Thu, 21 Mar 1996 15:55:02 -0300
Subject: [PATCH] a simplification about memory error messages.

---
 func.c   |  3 +--
 luamem.c | 29 +++++------------------------
 luamem.h | 15 ++++++++++-----
 opcode.c |  4 ++--
 table.c  |  7 +++----
 5 files changed, 21 insertions(+), 37 deletions(-)

diff --git a/func.c b/func.c
index d9ed9831..21b19a19 100644
--- a/func.c
+++ b/func.c
@@ -102,8 +102,7 @@ void lua_funcinfo (lua_Object func, char **filename, int *linedefined)
 void luaI_registerlocalvar (TaggedString *varname, int line)
 {
   if (numcurrvars >= maxcurrvars)
-    maxcurrvars = growvector(&currvars, maxcurrvars, LocVar,
-                    lockEM, MAX_WORD);
+    maxcurrvars = growvector(&currvars, maxcurrvars, LocVar, "", MAX_WORD);
   currvars[numcurrvars].varname = varname;
   currvars[numcurrvars].line = line;
   numcurrvars++;
diff --git a/luamem.c b/luamem.c
index 164cbca2..169255de 100644
--- a/luamem.c
+++ b/luamem.c
@@ -3,7 +3,7 @@
 ** TecCGraf - PUC-Rio
 */
 
-char *rcs_mem = "$Id: mem.c,v 1.9 1996/03/14 15:55:49 roberto Exp roberto $";
+char *rcs_mem = "$Id: mem.c,v 1.10 1996/03/21 16:31:32 roberto Exp roberto $";
 
 #include <stdlib.h>
 #include <string.h>
@@ -14,27 +14,8 @@ char *rcs_mem = "$Id: mem.c,v 1.9 1996/03/14 15:55:49 roberto Exp roberto $";
 #include "table.h"
 
 
-char *luaI_memerrormsg[NUMERRMSG] = {
-  "code size overflow",
-  "symbol table overflow",
-  "constant table overflow",
-  "stack size overflow",
-  "lex buffer overflow",
-  "lock table overflow"
-};
-
-
-static void mem_error (void)
-{
-  Long recovered = luaI_collectgarbage();  /* try to collect garbage  */
-  if (recovered)
-    lua_error("not enough memory");
-  else
-  { /* if there is no garbage then must exit */
-    fprintf(stderr, "lua error: memory overflow - unable to recover\n");
-    exit(1);
-  }
-}
+#define mem_error()  lua_error(memEM)
+ 
 
 void luaI_free (void *block)
 {
@@ -66,10 +47,10 @@ void *luaI_realloc (void *oldblock, unsigned long size)
 
 
 int luaI_growvector (void **block, unsigned long nelems, int size,
-                       enum memerrormsg errormsg, unsigned long limit)
+                       char *errormsg, unsigned long limit)
 {
   if (nelems >= limit)
-    lua_error(luaI_memerrormsg[errormsg]);
+    lua_error(errormsg);
   nelems = (nelems == 0) ? 20 : nelems*2;
   if (nelems > limit)
     nelems = limit;
diff --git a/luamem.h b/luamem.h
index dc0e925b..d22cc200 100644
--- a/luamem.h
+++ b/luamem.h
@@ -1,7 +1,7 @@
 /*
 ** mem.c
 ** memory manager for lua
-** $Id: mem.h,v 1.4 1996/03/14 15:55:49 roberto Exp roberto $
+** $Id: mem.h,v 1.5 1996/03/21 16:31:32 roberto Exp roberto $
 */
  
 #ifndef mem_h
@@ -13,9 +13,14 @@
 
 
 /* memory error messages */
-#define NUMERRMSG 6
-enum memerrormsg {codeEM, symbolEM, constantEM, stackEM, lexEM, lockEM};
-extern char *luaI_memerrormsg[];
+#define codeEM   "code size overflow"
+#define symbolEM   "symbol table overflow"
+#define constantEM   "constant table overflow"
+#define stackEM   "stack size overflow"
+#define lexEM   "lex buffer overflow"
+#define lockEM   "lock table overflow"
+#define tableEM  "table overflow"
+#define memEM "not enough memory"
 
 
 void luaI_free (void *block);
@@ -23,7 +28,7 @@ void *luaI_malloc (unsigned long size);
 void *luaI_realloc (void *oldblock, unsigned long size);
 void *luaI_buffer (unsigned long size);
 int luaI_growvector (void **block, unsigned long nelems, int size,
-                       enum memerrormsg errormsg, unsigned long limit);
+                       char *errormsg, unsigned long limit);
 
 #define new(s)          ((s *)luaI_malloc(sizeof(s)))
 #define newvector(n,s)  ((s *)luaI_malloc((n)*sizeof(s)))
diff --git a/opcode.c b/opcode.c
index c7db7824..539f2cf3 100644
--- a/opcode.c
+++ b/opcode.c
@@ -3,7 +3,7 @@
 ** TecCGraf - PUC-Rio
 */
 
-char *rcs_opcode="$Id: opcode.c,v 3.63 1996/03/20 17:05:44 roberto Exp roberto $";
+char *rcs_opcode="$Id: opcode.c,v 3.64 1996/03/21 16:31:32 roberto Exp roberto $";
 
 #include <setjmp.h>
 #include <stdio.h>
@@ -102,7 +102,7 @@ static void growstack (void)
   if (stacksize >= limit)
   {
     limit = stacksize;
-    lua_error(luaI_memerrormsg[stackEM]);
+    lua_error(stackEM);
   }
  }
 }
diff --git a/table.c b/table.c
index 3920ed19..6c77d2e9 100644
--- a/table.c
+++ b/table.c
@@ -3,7 +3,7 @@
 ** Module to control static tables
 */
 
-char *rcs_table="$Id: table.c,v 2.49 1996/03/14 15:57:19 roberto Exp roberto $";
+char *rcs_table="$Id: table.c,v 2.50 1996/03/21 16:31:32 roberto Exp roberto $";
 
 #include "mem.h"
 #include "opcode.h"
@@ -75,12 +75,11 @@ void luaI_initsymbol (void)
 */
 void luaI_initconstant (void)
 {
- int i;
  lua_maxconstant = BUFFER_BLOCK;
  lua_constant = newvector(lua_maxconstant, TaggedString *);
  /* pre-register mem error messages, to avoid loop when error arises */
- for (i=0; i<NUMERRMSG; i++)
-   luaI_findconstantbyname(luaI_memerrormsg[i]);
+ luaI_findconstantbyname(tableEM);
+ luaI_findconstantbyname(memEM);
 }