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18 #ifndef BASE64_H
19 # define BASE64_H
20
21
22 # include <idx.h>
23
24
25 # include <stdbool.h>
26
27 # ifdef __cplusplus
28 extern "C" {
29 # endif
30
31
32
33 # define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
34
35 struct base64_decode_context
36 {
37 int i;
38 char buf[4];
39 };
40
41 extern bool isbase64 (char ch) _GL_ATTRIBUTE_CONST;
42
43 extern void base64_encode (const char *restrict in, idx_t inlen,
44 char *restrict out, idx_t outlen);
45
46 extern idx_t base64_encode_alloc (const char *in, idx_t inlen, char **out);
47
48 extern void base64_decode_ctx_init (struct base64_decode_context *ctx);
49
50 extern bool base64_decode_ctx (struct base64_decode_context *ctx,
51 const char *restrict in, idx_t inlen,
52 char *restrict out, idx_t *outlen);
53
54 extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx,
55 const char *in, idx_t inlen,
56 char **out, idx_t *outlen);
57
58 #define base64_decode(in, inlen, out, outlen) \
59 base64_decode_ctx (NULL, in, inlen, out, outlen)
60
61 #define base64_decode_alloc(in, inlen, out, outlen) \
62 base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
63
64 # ifdef __cplusplus
65 }
66 # endif
67
68 #endif