Add kvz_ prefix to md5 functions

The non kvz_ symbols were being exported in the static lib, which got caught
by Travis tests.

src/extras/libmd5.c

@@ -8,8 +8,8 @@
  * This code has been tested against that, and is functionally equivalent,
  *
  * To compute the message digest of a chunk of bytes, declare an MD5Context
- * structure, pass it to MD5Init, call MD5Update as needed on buffers full of
- * bytes, and then call MD5Final, which will fill a supplied 16-byte array with
+ * structure, pass it to kvz_md5_init, call kvz_md5_update as needed on buffers full of
+ * bytes, and then call kvz_md5_final, which will fill a supplied 16-byte array with
  * the digest.
  */
 
@@ -46,7 +46,7 @@ void byteReverse(uint32_t *buf, unsigned len)
  * Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
  * initialization constants.
  */
-void MD5Init(context_md5_t *ctx)
+void kvz_md5_init(context_md5_t *ctx)
 {
   ctx->buf[0] = 0x67452301;
   ctx->buf[1] = 0xefcdab89;
@@ -61,7 +61,7 @@ void MD5Init(context_md5_t *ctx)
  * Update context to reflect the concatenation of another buffer full
  * of bytes.
  */
-void MD5Update(context_md5_t *ctx, const unsigned char *buf, unsigned len)
+void kvz_md5_update(context_md5_t *ctx, const unsigned char *buf, unsigned len)
 {
   uint32_t t;
 
@@ -109,7 +109,7 @@ void MD5Update(context_md5_t *ctx, const unsigned char *buf, unsigned len)
  * Final wrapup - pad to 64-byte boundary with the bit pattern
  * 1 0* (64-bit count of bits processed, MSB-first)
  */
-void MD5Final(unsigned char digest[16], context_md5_t *ctx)
+void kvz_md5_final(unsigned char digest[16], context_md5_t *ctx)
 {
   unsigned count;
   unsigned char *p;
@@ -169,7 +169,7 @@ void MD5Final(unsigned char digest[16], context_md5_t *ctx)
 
 /*
  * The core of the MD5 algorithm, this alters an existing MD5 hash to
- * reflect the addition of 16 longwords of new data.  MD5Update blocks
+ * reflect the addition of 16 longwords of new data.  kvz_md5_update blocks
  * the data and converts bytes into longwords for this routine.
  */
 static void MD5Transform(uint32_t buf[4], uint32_t const in[16])

src/extras/libmd5.h

@@ -48,9 +48,9 @@ typedef struct _context_md5_t {
 #ifdef __cplusplus
 extern "C" {
 #endif
-void MD5Init(context_md5_t *ctx);
-void MD5Update(context_md5_t *ctx, const unsigned char *buf, unsigned len);
-void MD5Final(unsigned char digest[16], context_md5_t *ctx);
+void kvz_md5_init(context_md5_t *ctx);
+void kvz_md5_update(context_md5_t *ctx, const unsigned char *buf, unsigned len);
+void kvz_md5_final(unsigned char digest[16], context_md5_t *ctx);
 #ifdef __cplusplus
 }
 #endif

src/strategies/generic/nal-generic.c

@@ -35,12 +35,12 @@ static void array_md5_generic(const kvz_pixel* data,
   assert(SEI_HASH_MAX_LENGTH >= 16);
 
   context_md5_t md5_ctx;
-  MD5Init(&md5_ctx);
+  kvz_md5_init(&md5_ctx);
   
   unsigned bytes = width * height * sizeof(kvz_pixel);
-  MD5Update(&md5_ctx, (const unsigned char *)data, bytes);
+  kvz_md5_update(&md5_ctx, (const unsigned char *)data, bytes);
 
-  MD5Final(checksum_out, &md5_ctx);
+  kvz_md5_final(checksum_out, &md5_ctx);
 }
 
 static void array_checksum_generic(const kvz_pixel* data,