Export base64 encoder and decoder

include/neatvnc.h

@@ -48,6 +48,9 @@
 #define nvnc_trace(...)
 #endif
 
+#define NVNC_BASE64_ENCODED_SIZE(x) ((((x) + 2) / 3) * 4 + 1)
+#define NVNC_BASE64_DECODED_MAX_SIZE(x) ((((x) + 3) / 4) * 3)
+
 struct nvnc;
 struct nvnc_client;
 struct nvnc_desktop_layout;
@@ -237,3 +240,6 @@ void nvnc_set_cursor(struct nvnc*, struct nvnc_fb*, uint16_t width,
 void nvnc_set_log_fn(nvnc_log_fn);
 void nvnc_set_log_level(enum nvnc_log_level);
 void nvnc__log(const struct nvnc_log_data*, const char* fmt, ...);
+
+void nvnc_base64_encode(char* dst, const uint8_t* src, size_t src_len);
+ssize_t nvnc_base64_decode(uint8_t* dst, const char* src);

src/base64.c

@@ -14,6 +14,7 @@
  */
 
 #include "base64.h"
+#include "neatvnc.h"
 
 #include <unistd.h>
 #include <stdint.h>
@@ -21,6 +22,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define EXPORT __attribute__((visibility("default")))
+
 static const char base64_enc_lut[] =
 	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
@@ -153,3 +156,15 @@ ssize_t base64_decode(uint8_t* dst, const char* src)
 
 	return i * 3 + di;
 }
+
+EXPORT
+void nvnc_base64_encode(char* dst, const uint8_t* src, size_t src_len)
+{
+	base64_encode(dst, src, src_len);
+}
+
+EXPORT
+ssize_t nvnc_base64_decode(uint8_t* dst, const char* src)
+{
+	return base64_decode(dst, src);
+}