godot-nim/godot/internal/godotstrings.nim
2017-08-02 22:14:41 +07:00

54 lines
1.8 KiB
Nim

# Copyright (c) 2017 Xored Software, Inc.
type
GodotString* {.byref.} = object
data: array[sizeof(int), byte]
proc initGodotString(dest: var GodotString) {.
importc: "godot_string_new".}
proc initGodotString(dest: var GodotString; contents: cstring;
size: cint) {.
importc: "godot_string_new_data".}
## Initializes ``dest`` from UTF-8 ``contents``
proc getData(self: GodotString; dest: cstring;
size: var cint) {.
noSideEffect
importc: "godot_string_get_data".}
## Converts ``self`` into UTF-8 encoding, putting the result into ``dest``.
proc len*(self: GodotString): cint {.inline.} =
## Returns the length of string in bytes if it is represented as UTF-8.
getData(self, nil, result)
proc cstring*(self: GodotString): cstring {.
importc: "godot_string_c_str".}
proc `==`*(self, b: GodotString): bool {.
importc: "godot_string_operator_equal".}
proc `<`*(self, b: GodotString): bool {.
importc: "godot_string_operator_less".}
proc `&`*(self, b: GodotString): GodotString {.
importc: "godot_string_operator_plus".}
proc deinit*(self: var GodotString) {.importc: "godot_string_destroy".}
proc `$`*(self: GodotString): string =
## Converts the ``GodotString`` into Nim string
var length = self.len
result = newStringOfCap(length)
getData(self, addr result[0], length)
result.setLen(length)
assert(result[length] == '\0')
proc toGodotString*(s: string): GodotString {.inline.} =
## Converts the Nim string into ``GodotString``
if s.isNil:
initGodotString(result)
else:
initGodotString(result, unsafeAddr s[0], cint(s.len + 1))
proc toGodotString*(s: cstring): GodotString {.inline.} =
## Converts the cstring into ``GodotString``
if s.isNil:
initGodotString(result)
else:
initGodotString(result, s, cint(s.len + 1))