libfdt: Sequential write support
This patch adds code to libfdt to create flat trees from scratch, writing
sequentially.
diff --git a/tests/testutils.c b/tests/testutils.c
index af8c2ad..4997a8e 100644
--- a/tests/testutils.c
+++ b/tests/testutils.c
@@ -202,3 +202,29 @@
CONFIG("Usage: %s <dtb file>", argv[0]);
return load_blob(argv[1]);
}
+
+void save_blob(const char *filename, struct fdt_header *fdt)
+{
+ int fd;
+ int totalsize;
+ int offset;
+ void *p;
+ int ret;
+
+ fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+ if (fd < 0)
+ CONFIG("Couldn't open \"%s\" to write blob: %s", filename,
+ strerror(errno));
+
+ totalsize = fdt32_to_cpu(fdt->totalsize);
+ offset = 0;
+ p = fdt;
+
+ while (offset < totalsize) {
+ ret = write(fd, p + offset, totalsize - offset);
+ if (ret < 0)
+ CONFIG("Couldn't write to \"%s\": %s", filename,
+ strerror(errno));
+ offset += ret;
+ }
+}
