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wslua: Return nil from Dissector.get() when not found 

Return nil from Dissector.get() and DissectorTable.get() when the
reference is not found. This can be used to check for existence of
a dissector or dissector table before use.

We already do this for DissectorTable.get_dissector().
This commit is contained in:
Stig Bjørlykke 2020-09-30 12:05:41 +02:00 committed by Wireshark GitLab Utility
parent 9b46447bb1
commit ebfa1f8a4b
1 changed files with 8 additions and 9 deletions
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17
epan/wslua/wslua_dissector.c
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@ -40,11 +40,11 @@ WSLUA_CONSTRUCTOR Dissector_get (lua_State *L) {
if ((d = find_dissector(name))) {
pushDissector(L, d);
WSLUA_RETURN(1); /* The <<lua_class_Dissector,`Dissector`>> reference. */
} else {
lua_pushnil(L);
}
WSLUA_ARG_ERROR(Dissector_get,NAME,"No such dissector");
return 0;
WSLUA_RETURN(1); /* The <<lua_class_Dissector,`Dissector`>> reference if found, otherwise `nil`. */
}
/* Allow dissector key names to be sorted alphabetically. */
@ -303,12 +303,11 @@ WSLUA_CONSTRUCTOR DissectorTable_get (lua_State *L) {
dt->expired = FALSE;
pushDissectorTable(L, dt);
WSLUA_RETURN(1); /* The `DissectorTable`. */
} else {
lua_pushnil(L);
}
WSLUA_ARG_ERROR(DissectorTable_get,TABLENAME,"no such dissector_table");
return 0;
WSLUA_RETURN(1); /* The <<lua_class_DissectorTable,`DissectorTable`>> reference if found, otherwise `nil`. */
}
WSLUA_METHOD DissectorTable_add (lua_State *L) {
@ -597,11 +596,11 @@ WSLUA_METHOD DissectorTable_get_dissector (lua_State *L) {
if (handle) {
pushDissector(L,handle);
WSLUA_RETURN(1); /* The <<lua_class_Dissector,`Dissector`>> handle if found, otherwise `nil` */
} else {
lua_pushnil(L);
WSLUA_RETURN(1);
}
WSLUA_RETURN(1); /* The <<lua_class_Dissector,`Dissector`>> handle if found, otherwise `nil` */
}
WSLUA_METHOD DissectorTable_add_for_decode_as (lua_State *L) {