0 /*

1 punycode.c from RFC 3492

2 http://www.nicemice.net/idn/

3 Adam M. Costello

4 http://www.nicemice.net/amc/

5

6 This is ANSI C code (C89) implementing Punycode (RFC 3492).

7

8

9

10 C. Disclaimer and license

11

12 Regarding this entire document or any portion of it (including

13 the pseudocode and C code), the author makes no guarantees and

14 is not responsible for any damage resulting from its use. The

15 author grants irrevocable permission to anyone to use, modify,

16 and distribute it in any way that does not diminish the rights

17 of anyone else to use, modify, and distribute it, provided that

18 redistributed derivative works do not contain misleading author or

19 version information. Derivative works need not be licensed under

20 similar terms.

21 */

22

23 #include <limits.h>

24

25 enum punycode_status {

26 punycode_success,

27 punycode_bad_input, /* Input is invalid. */

28 punycode_big_output, /* Output would exceed the space provided. */

29 punycode_overflow /* Input needs wider integers to process. */

30 };

31

32 #if UINT_MAX >= (1 << 26) - 1

33 typedef unsigned int punycode_uint;

34 #else

35 typedef unsigned long punycode_uint;

36 #endif

37

38 enum punycode_status punycode_encode(punycode_uint input_length,

39 const punycode_uint input[],

40 const unsigned char case_flags[],

41 punycode_uint* output_length,

42 char output[]);

43

44 enum punycode_status punycode_decode(punycode_uint input_length,

45 const char input[],

46 punycode_uint* output_length,

47 punycode_uint output[],

48 unsigned char case_flags[]);

49