libdpkg: Rename BUFFER_WRITE_MD5 to BUFFER_FILTER_MD5

lib/dpkg/buffer.c

@@ -57,7 +57,7 @@ static off_t
 buffer_filter_init(struct buffer_data *data)
 {
 	switch (data->type) {
-	case BUFFER_WRITE_MD5:
+	case BUFFER_FILTER_MD5:
 		buffer_md5_init(data);
 		break;
 	}
@@ -87,7 +87,7 @@ static off_t
 buffer_filter_done(struct buffer_data *data)
 {
 	switch (data->type) {
-	case BUFFER_WRITE_MD5:
+	case BUFFER_FILTER_MD5:
 		buffer_md5_done(data);
 		break;
 	}
@@ -108,7 +108,7 @@ buffer_write(struct buffer_data *data, const void *buf, off_t length)
 		break;
 	case BUFFER_WRITE_NULL:
 		break;
-	case BUFFER_WRITE_MD5:
+	case BUFFER_FILTER_MD5:
 		MD5Update(&(((struct buffer_md5_ctx *)data->arg.ptr)->ctx), buf, length);
 		break;
 	default:

lib/dpkg/buffer.h

@@ -35,7 +35,7 @@ DPKG_BEGIN_DECLS
 #define BUFFER_WRITE_VBUF		1
 #define BUFFER_WRITE_FD			2
 #define BUFFER_WRITE_NULL		3
-#define BUFFER_WRITE_MD5		5
+#define BUFFER_FILTER_MD5		5
 
 #define BUFFER_READ_FD			0
 
@@ -48,10 +48,10 @@ struct buffer_data {
 };
 
 # define buffer_md5(buf, hash, limit) \
-	buffer_hash(buf, hash, BUFFER_WRITE_MD5, limit)
+	buffer_hash(buf, hash, BUFFER_FILTER_MD5, limit)
 
 # define fd_md5(fd, hash, limit, ...) \
-	buffer_copy_IntPtr(fd, BUFFER_READ_FD, hash, BUFFER_WRITE_MD5, \
+	buffer_copy_IntPtr(fd, BUFFER_READ_FD, hash, BUFFER_FILTER_MD5, \
 	                   limit, __VA_ARGS__)
 # define fd_fd_copy(fd1, fd2, limit, ...) \
 	buffer_copy_IntInt(fd1, BUFFER_READ_FD, fd2, BUFFER_WRITE_FD, \