commit 87495730b5edf92b303cfe0127ad501b79efabc6
author Laurence Lundblade <laurencelundblade@users.noreply.github.com> Fri Feb 26 10:05:55 2021 -0700
committer GitHub <noreply@github.com> Fri Feb 26 10:05:55 2021 -0700
tree 87cbec51a514669b85209509d88a20fc49c4d70c
parent d71274d5708064776f28c8b52bdc022411c4da7b

Allow partial decode of CBOR sequences (#77)

Add QCBORDecode_PartialFinish() to get the offset to which decoding has progressed. Also reports error status of partial decoding.

Co-authored-by: Laurence Lundblade <lgl@securitytheory.com>

test/qcbor_decode_tests.c

diff --git a/test/qcbor_decode_tests.c b/test/qcbor_decode_tests.c
index a7ef065..567f654 100644
--- a/test/qcbor_decode_tests.c
+++ b/test/qcbor_decode_tests.c
@@ -6138,8 +6138,9 @@
 int32_t CBORSequenceDecodeTests(void)
 {
    QCBORDecodeContext DCtx;
-   QCBORItem Item;
-   QCBORError uCBORError;
+   QCBORItem          Item;
+   QCBORError         uCBORError;
+   size_t             uConsumed;
 
    // --- Test a sequence with extra bytes ---
 
@@ -6159,12 +6160,24 @@
       return 2;
    }
 
+   uCBORError = QCBORDecode_PartialFinish(&DCtx, &uConsumed);
+   if(uCBORError != QCBOR_ERR_EXTRA_BYTES ||
+      uConsumed != 12) {
+      return 102;
+   }
+
    // Get a second item
    uCBORError = QCBORDecode_GetNext(&DCtx, &Item);
    if(uCBORError != QCBOR_ERR_BAD_OPT_TAG) {
       return 66;
    }
 
+   uCBORError = QCBORDecode_PartialFinish(&DCtx, &uConsumed);
+   if(uCBORError != QCBOR_ERR_EXTRA_BYTES ||
+      uConsumed != 14) {
+      return 102;
+   }
+
    // Get a third item
    uCBORError = QCBORDecode_GetNext(&DCtx, &Item);
    if(uCBORError != QCBOR_SUCCESS) {