lighttpd 1.4.x https://www.lighttpd.net/
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#ifndef _BASE64_H_
#define _BASE64_H_
#include "first.h"
#include "buffer.h"
typedef enum {
BASE64_STANDARD,
BASE64_URL,
} base64_charset;
size_t li_base64_dec(unsigned char *result, size_t out_length, const char *in, size_t in_length, base64_charset charset);
unsigned char* buffer_append_base64_decode(buffer *out, const char* in, size_t in_length, base64_charset charset);
size_t li_base64_enc(char* restrict out, size_t out_length, const unsigned char* restrict in, size_t in_length, base64_charset charset, int pad);
#define li_to_base64_no_padding(out, out_length, in, in_length, charset) \
li_base64_enc((out), (out_length), (in), (in_length), (charset), 0)
#define li_to_base64(out, out_length, in, in_length, charset) \
li_base64_enc((out), (out_length), (in), (in_length), (charset), 1)
__attribute_nonnull__
__attribute_returns_nonnull__
char* buffer_append_base64_enc(buffer *out, const unsigned char* in, size_t in_length, base64_charset charset, int pad);
#define buffer_append_base64_encode_no_padding(out, in, in_length, charset) \
buffer_append_base64_enc((out), (in), (in_length), (charset), 0)
#define buffer_append_base64_encode(out, in, in_length, charset) \
buffer_append_base64_enc((out), (in), (in_length), (charset), 1)
#endif