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Lua: return nil when function failed instead of returning nothing

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23405 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Maurus Cuelenaere 2009-10-29 17:13:36 +00:00
parent 8fb258856c
commit 5ca112b21e
1 changed files with 15 additions and 12 deletions
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25
apps/plugins/lua/rocklib.c
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@ -330,12 +330,11 @@ RB_WRAP(lcd_get_backdrop)
{ {
fb_data* backdrop = rb->lcd_get_backdrop(); fb_data* backdrop = rb->lcd_get_backdrop();
if(backdrop == NULL) if(backdrop == NULL)
return 0; lua_pushnil(L);
else else
{
rli_wrap(L, backdrop, LCD_WIDTH, LCD_HEIGHT); rli_wrap(L, backdrop, LCD_WIDTH, LCD_HEIGHT);
return 1; return 1;
}
} }
#endif /* LCD_DEPTH > 1 */ #endif /* LCD_DEPTH > 1 */
@ -478,24 +477,28 @@ RB_WRAP(read_bmp_file)
if(result > 0) if(result > 0)
{ {
bm.data = (unsigned char*) rli_alloc(L, bm.width, bm.height); bm.data = (unsigned char*) rli_alloc(L, bm.width, bm.height);
rb->read_bmp_file(filename, &bm, result, format, NULL); if(rb->read_bmp_file(filename, &bm, result, format, NULL) < 0)
{
/* Error occured, drop newly allocated image from stack */
lua_pop(L, 1);
lua_pushnil(L);
}
}
else
lua_pushnil(L);
return 1; return 1;
}
return 0;
} }
RB_WRAP(current_path) RB_WRAP(current_path)
{ {
const char *current_path = get_current_path(L, 1); const char *current_path = get_current_path(L, 1);
if(current_path != NULL) if(current_path != NULL)
{
lua_pushstring(L, current_path); lua_pushstring(L, current_path);
return 1;
}
else else
return 0; lua_pushnil(L);
return 1;
} }
static void fill_text_message(lua_State *L, struct text_message * message, static void fill_text_message(lua_State *L, struct text_message * message,