better treatment for source names

ldebug.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.c,v 1.45 2000/10/05 13:00:17 roberto Exp roberto $
+** $Id: ldebug.c,v 1.46 2000/10/06 12:45:25 roberto Exp roberto $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
@@ -193,7 +193,7 @@ static void lua_funcinfo (lua_State *L, lua_Debug *ar, StkId func) {
       lua_error(L, "value for `lua_getinfo' is not a function");
   }
   if (cl->isC) {
-    ar->source = "(C)";
+    ar->source = "=C";
     ar->linedefined = -1;
     ar->what = "C";
   }

ldo.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 1.103 2000/10/05 13:00:17 roberto Exp roberto $
+** $Id: ldo.c,v 1.104 2000/10/06 12:45:25 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -260,14 +260,16 @@ static int protectedparser (lua_State *L, ZIO *z, int bin) {
 
 static int parse_file (lua_State *L, const char *filename) {
   ZIO z;
-  char source[MAXFILENAME];
   int status;
   int bin;  /* flag for file mode */
   int c;    /* look ahead char */
   FILE *f = (filename == NULL) ? stdin : fopen(filename, "r");
   if (f == NULL) return LUA_ERRFILE;  /* unable to open file */
-  if (filename == NULL) filename = "(stdin)";
-  sprintf(source, "@%.*s", (int)sizeof(source)-2, filename);
+  lua_pushstring(L, "@");
+  lua_pushstring(L, (filename == NULL) ? "(stdin)" : filename);
+  lua_concat(L, 2);
+  filename = lua_tostring(L, -1);  /* filename = '@'..filename */
+  lua_pop(L, 1);  /* OK: there is no GC during parser */
   c = fgetc(f);
   ungetc(c, f);
   bin = (c == ID_CHUNK);
@@ -275,7 +277,7 @@ static int parse_file (lua_State *L, const char *filename) {
     f = freopen(filename, "rb", f);  /* set binary mode */
     if (f == NULL) return LUA_ERRFILE;  /* unable to reopen file */
   }
-  luaZ_Fopen(&z, f, source);
+  luaZ_Fopen(&z, f, filename);
   status = protectedparser(L, &z, bin);
   if (f != stdin)
     fclose(f);

llimits.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llimits.h,v 1.16 2000/10/03 14:03:21 roberto Exp roberto $
+** $Id: llimits.h,v 1.17 2000/10/06 19:28:38 roberto Exp roberto $
 ** Limits, basic types, and some other "installation-dependent" definitions
 ** See Copyright Notice in lua.h
 */
@@ -104,7 +104,7 @@ typedef unsigned long Instruction;
 /*
 ** limits for opcode arguments.
 ** we use (signed) int to manipulate most arguments,
-** so they must fit in BITS_INT-1 bits (-1 for signal)
+** so they must fit in BITS_INT-1 bits (-1 for sign)
 */
 #if SIZE_U < BITS_INT-1
 #define MAXARG_U        ((1<<SIZE_U)-1)
@@ -196,10 +196,4 @@ typedef unsigned long Instruction;
 #endif
 
 
-/* maximum part of a file name kept for error messages */
-#ifndef MAXFILENAME
-#define	MAXFILENAME	260
-#endif
-
-
 #endif

lobject.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.c,v 1.51 2000/10/03 14:03:21 roberto Exp roberto $
+** $Id: lobject.c,v 1.52 2000/10/05 12:14:08 roberto Exp roberto $
 ** Some generic functions over Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -87,23 +87,31 @@ void luaO_verror (lua_State *L, const char *fmt, ...) {
 }
 
 
-#define EXTRALEN	sizeof("string \"...\"0")
+#define EXTRALEN	sizeof(" string \"s...\" ")
 
-void luaO_chunkid (char *out, const char *source, int len) {
-  if (*source == '(') {
-    strncpy(out, source+1, len-1);  /* remove first char */
-    out[len-1] = '\0';  /* make sure `out' has an end */
-    out[strlen(out)-1] = '\0';  /* remove last char */
-  }
+void luaO_chunkid (char *out, const char *source, int bufflen) {
+  if (*source == '=')
+    sprintf(out, "%.*s", bufflen, source+1);  /* remove first char */
   else {
-    len -= EXTRALEN;
-    if (*source == '@')
-      sprintf(out, "file `%.*s'", len, source+1);
+    bufflen -= EXTRALEN;
+    if (*source == '@') {
+      int l;
+      source++;  /* skip the `@' */
+      l = strlen(source);
+      if (l>bufflen) {
+        source += (l-bufflen);  /* get last part of file name */
+        sprintf(out, "file `...%s'", source);
+      }
+      else
+        sprintf(out, "file `%s'", source);
+    }
     else {
-      const char *b = strchr(source , '\n');  /* stop at first new line */
-      int lim = (b && (b-source)<len) ? b-source : len;
-      sprintf(out, "string \"%.*s\"", lim, source);
-      strcpy(out+lim+(EXTRALEN-sizeof("...\"0")), "...\"");
+      int len = strcspn(source, "\n");  /* stop at first newline */
+      if (len > bufflen) len = bufflen;
+      if (source[len] != '\0')  /* must truncate? */
+        sprintf(out, "string \"%.*s...\"", len, source);
+      else
+        sprintf(out, "string \"%s\"", source);
     }
   }
 }