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LUA_PATH components may have multiple interrogation marks

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Roberto Ierusalimschy 2003-03-11 09:08:13 -03:00
parent 7c3857cded
commit 430d6db928
1 changed files with 17 additions and 7 deletions
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24
lbaselib.c
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@ -1,5 +1,5 @@
/*
** $Id: lbaselib.c,v 1.124 2003/02/27 11:52:30 roberto Exp roberto $
** $Id: lbaselib.c,v 1.125 2003/03/06 19:36:16 roberto Exp roberto $
** Basic library
** See Copyright Notice in lua.h
*/
@ -408,6 +408,10 @@ static int luaB_newproxy (lua_State *L) {
#define LUA_PATH_SEP ';'
#endif
#ifndef LUA_PATH_MARK
#define LUA_PATH_MARK '?'
#endif
#ifndef LUA_PATH_DEFAULT
#define LUA_PATH_DEFAULT "?;?.lua"
#endif
@ -438,12 +442,18 @@ static const char *pushnextpath (lua_State *L, const char *path) {
static void pushcomposename (lua_State *L) {
const char *path = lua_tostring(L, -1);
const char *wild = strchr(path, '?');
if (wild == NULL) return; /* no wild char; path is the file name */
lua_pushlstring(L, path, wild - path);
lua_pushvalue(L, 1); /* package name */
lua_pushstring(L, wild + 1);
lua_concat(L, 3);
const char *wild;
int n = 1;
while ((wild = strchr(path, LUA_PATH_MARK)) != NULL) {
/* is there stack space for prefix, name, and eventual last sufix? */
luaL_checkstack(L, 3, "too many marks in a path component");
lua_pushlstring(L, path, wild - path); /* push prefix */
lua_pushvalue(L, 1); /* push package name (in place of MARK) */
path = wild + 1; /* continue after MARK */
n += 2;
}
lua_pushstring(L, path); /* push last sufix (`n' already includes this) */
lua_concat(L, n);
}