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18 #ifndef BASE32_H
19 # define BASE32_H
20
21
22 # include <idx.h>
23
24
25 # include <stdbool.h>
26
27
28
29 # define BASE32_LENGTH(inlen) ((((inlen) + 4) / 5) * 8)
30
31 struct base32_decode_context
32 {
33 int i;
34 char buf[8];
35 };
36
37 extern bool isbase32 (char ch) _GL_ATTRIBUTE_CONST;
38
39 extern void base32_encode (const char *restrict in, idx_t inlen,
40 char *restrict out, idx_t outlen);
41
42 extern idx_t base32_encode_alloc (const char *in, idx_t inlen, char **out);
43
44 extern void base32_decode_ctx_init (struct base32_decode_context *ctx);
45
46 extern bool base32_decode_ctx (struct base32_decode_context *ctx,
47 const char *restrict in, idx_t inlen,
48 char *restrict out, idx_t *outlen);
49
50 extern bool base32_decode_alloc_ctx (struct base32_decode_context *ctx,
51 const char *in, idx_t inlen,
52 char **out, idx_t *outlen);
53
54 #define base32_decode(in, inlen, out, outlen) \
55 base32_decode_ctx (NULL, in, inlen, out, outlen)
56
57 #define base32_decode_alloc(in, inlen, out, outlen) \
58 base32_decode_alloc_ctx (NULL, in, inlen, out, outlen)
59
60 #endif