Implement Unsigned Little Endian Base 128.
Signed-off-by: Orit Wasserman <owass...@redhat.com>
---
migration.h | 4 ++++
savevm.c | 28 ++++++++++++++++++++++++++++
2 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/migration.h b/migration.h
index 691b367..d798fac 100644
--- a/migration.h
+++ b/migration.h
@@ -92,4 +92,8 @@ void migrate_add_blocker(Error *reason);
*/
void migrate_del_blocker(Error *reason);
+/* ULEB128 */
+int uleb128_encode_small(uint8_t *out, uint32_t n);
+int uleb128_decode_small(const uint8 *in, uint32_t *n);
+
#endif
diff --git a/savevm.c b/savevm.c
index 12fb209..0b2fe38 100644
--- a/savevm.c
+++ b/savevm.c
@@ -2368,3 +2368,31 @@ void vmstate_register_ram_global(MemoryRegion *mr)
{
vmstate_register_ram(mr, NULL);
}
+
+/* ULEB128 */
+int uleb128_encode_small(uint8_t *out, uint32_t n)
+{
+ assert(n <= 0x3fff);
+ if (n < 0x80) {
+ *out++ = n;
+ return 1;
+ } else {
+ *out++ = (n & 0x7f) | 0x80;
+ *out++ = n >> 7;
+ return 2;
+ }
+}
+
+int uleb128_decode_small(const uint8 *in, uint32_t *n)
+{
+ if (!(*in & 0x80)) {
+ *n = *in++;
+ return 1;
+ } else {
+ *n = *in++ & 0x7f;
+ assert(!(*in & 0x80));
+ *n |= *in++ << 7;
+ return 2;
+ }
+}
+
--
1.7.7.6
