From e8a7ecb982effdfc1148098b288c6ac7130f756e Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 25 May 2005 10:21:26 -0300
Subject: luaL_findstring -> luaL_checkoption

---
 lauxlib.c  | 13 ++++++++-----
 lauxlib.h  |  5 +++--
 lbaselib.c |  5 ++---
 liolib.c   |  8 +++-----
 loslib.c   |  5 ++---
 5 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/lauxlib.c b/lauxlib.c
index 0c64f9e5..b8205191 100644
--- a/lauxlib.c
+++ b/lauxlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.c,v 1.132 2005/05/16 21:19:00 roberto Exp roberto $
+** $Id: lauxlib.c,v 1.133 2005/05/17 19:49:15 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -95,12 +95,15 @@ LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
 /* }====================================================== */
 
 
-LUALIB_API int luaL_findstring (const char *name, const char *const list[]) {
+LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def,
+                                 const char *const lst[]) {
+  const char *name = (def) ? luaL_optstring(L, narg, def) :
+                             luaL_checkstring(L, narg);
   int i;
-  for (i=0; list[i]; i++)
-    if (strcmp(list[i], name) == 0)
+  for (i=0; lst[i]; i++)
+    if (strcmp(lst[i], name) == 0)
       return i;
-  return -1;  /* name not found */
+  return luaL_error(L, "invalid option " LUA_QS, name);
 }
 
 
diff --git a/lauxlib.h b/lauxlib.h
index 323798bc..2fcb193c 100644
--- a/lauxlib.h
+++ b/lauxlib.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.h,v 1.75 2005/03/29 16:20:48 roberto Exp roberto $
+** $Id: lauxlib.h,v 1.76 2005/05/20 19:09:05 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -59,7 +59,8 @@ LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
 LUALIB_API void (luaL_where) (lua_State *L, int lvl);
 LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
 
-LUALIB_API int (luaL_findstring) (const char *st, const char *const lst[]);
+LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
+                                   const char *const lst[]);
 
 LUALIB_API const char *(luaL_searchpath) (lua_State *L, const char *name,
                                                         const char *path);
diff --git a/lbaselib.c b/lbaselib.c
index 1fea255f..0eee03dd 100644
--- a/lbaselib.c
+++ b/lbaselib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lbaselib.c,v 1.176 2005/05/17 19:49:15 roberto Exp roberto $
+** $Id: lbaselib.c,v 1.177 2005/05/20 15:53:42 roberto Exp roberto $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
@@ -192,9 +192,8 @@ static int luaB_collectgarbage (lua_State *L) {
     "count", "step", "setpause", "setstepmul", NULL};
   static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
     LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL};
-  int o = luaL_findstring(luaL_optstring(L, 1, "collect"), opts);
+  int o = luaL_checkoption(L, 1, "collect", opts);
   int ex = luaL_optinteger(L, 2, 0);
-  luaL_argcheck(L, o >= 0, 1, "invalid option");
   lua_pushinteger(L, lua_gc(L, optsnum[o], ex));
   return 1;
 }
diff --git a/liolib.c b/liolib.c
index f78f0245..692dd666 100644
--- a/liolib.c
+++ b/liolib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 2.59 2005/03/18 18:01:14 roberto Exp roberto $
+** $Id: liolib.c,v 2.60 2005/05/16 21:19:00 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -400,9 +400,8 @@ static int f_seek (lua_State *L) {
   static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
   static const char *const modenames[] = {"set", "cur", "end", NULL};
   FILE *f = tofile(L);
-  int op = luaL_findstring(luaL_optstring(L, 2, "cur"), modenames);
+  int op = luaL_checkoption(L, 2, "cur", modenames);
   lua_Integer offset = luaL_optinteger(L, 3, 0);
-  luaL_argcheck(L, op != -1, 2, "invalid mode");
   op = fseek(f, offset, mode[op]);
   if (op)
     return pushresult(L, 0, NULL);  /* error */
@@ -417,8 +416,7 @@ static int f_setvbuf (lua_State *L) {
   static const int mode[] = {_IONBF, _IOFBF, _IOLBF};
   static const char *const modenames[] = {"no", "full", "line", NULL};
   FILE *f = tofile(L);
-  int op = luaL_findstring(luaL_checkstring(L, 2), modenames);
-  luaL_argcheck(L, op != -1, 2, "invalid mode");
+  int op = luaL_checkoption(L, 2, NULL, modenames);
   return pushresult(L, setvbuf(f, NULL, mode[op], 0) == 0, NULL);
 }
 
diff --git a/loslib.c b/loslib.c
index 0d3b7047..48dc9179 100644
--- a/loslib.c
+++ b/loslib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: loslib.c,v 1.8 2005/05/16 21:19:00 roberto Exp roberto $
+** $Id: loslib.c,v 1.9 2005/05/17 19:49:15 roberto Exp roberto $
 ** Standard Operating System library
 ** See Copyright Notice in lua.h
 */
@@ -197,9 +197,8 @@ static int io_setloc (lua_State *L) {
   static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
      "numeric", "time", NULL};
   const char *l = lua_tostring(L, 1);
-  int op = luaL_findstring(luaL_optstring(L, 2, "all"), catnames);
+  int op = luaL_checkoption(L, 2, "all", catnames);
   luaL_argcheck(L, l || lua_isnoneornil(L, 1), 1, "string expected");
-  luaL_argcheck(L, op != -1, 2, "invalid option");
   lua_pushstring(L, setlocale(cat[op], l));
   return 1;
 }
-- 
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