1 files changed, 166 insertions, 0 deletions
diff --git a/libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_ManifestEncoder.c b/libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_ManifestEncoder.c
new file mode 100644
index 00000000..0d8f52bf
--- /dev/null
+++ b/libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_ManifestEncoder.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+/**
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <LongBow/runtime.h>
+
+#include <parc/algol/parc_Memory.h>
+#include <parc/algol/parc_Object.h>
+#include <parc/algol/parc_Buffer.h>
+#include <parc/algol/parc_BufferComposer.h>
+
+#include <ccnx/common/ccnx_Manifest.h>
+#include <ccnx/common/ccnx_ManifestHashGroup.h>
+
+#include <ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_Types.h>
+#include <ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_ManifestEncoder.h>
+
+#include <ccnx/common/codec/ccnxCodec_TlvUtilities.h>
+#include <ccnx/common/ccnx_PayloadType.h>
+#include <ccnx/common/ccnx_InterestReturn.h>
+
+static size_t
+_appendPointer(CCNxCodecTlvEncoder *encoder, CCNxManifestHashGroupPointer *ptr)
+{
+    const PARCBuffer *digest = ccnxManifestHashGroupPointer_GetDigest(ptr);
+    CCNxManifestHashGroupPointerType type = ccnxManifestHashGroupPointer_GetType(ptr);
+
+    ssize_t length = -1;
+    switch (type) {
+        case CCNxManifestHashGroupPointerType_Data:
+            length = ccnxCodecTlvEncoder_AppendBuffer(encoder, CCNxCodecSchemaV1Types_CCNxManifestHashGroup_DataPointer, (PARCBuffer *) digest);
+            break;
+        case CCNxManifestHashGroupPointerType_Manifest:
+            length = ccnxCodecTlvEncoder_AppendBuffer(encoder, CCNxCodecSchemaV1Types_CCNxManifestHashGroup_ManifestPointer, (PARCBuffer *) digest);
+            break;
+        default:
+            assertTrue(false, "Invalid pointer type %d", type);
+    }
+
+    if (length < 0) {
+        CCNxCodecError *error = ccnxCodecError_Create(TLV_MISSING_MANDATORY, __func__, __LINE__, ccnxCodecTlvEncoder_Position(encoder));
+        ccnxCodecTlvEncoder_SetError(encoder, error);
+        ccnxCodecError_Release(&error);
+    }
+
+    return length;
+}
+
+ssize_t
+_appendMetadata(CCNxCodecTlvEncoder *encoder, CCNxManifestHashGroup *group)
+{
+    ssize_t length = 0;
+
+    // Pre-populate this field -- we'll come back and fill in the length after we're done
+    size_t startPosition = ccnxCodecTlvEncoder_Position(encoder);
+    ccnxCodecTlvEncoder_AppendContainer(encoder, CCNxCodecSchemaV1Types_CCNxManifestHashGroup_Metadata, length);
+
+    // Now append all metadata that exists in the hash group.
+    const CCNxName *locator = ccnxManifestHashGroup_GetLocator(group);
+    if (locator != NULL) {
+        char *nameString = ccnxName_ToString(locator);
+        PARCBuffer *nameBuffer = parcBuffer_AllocateCString(nameString);
+        length += ccnxCodecTlvEncoder_AppendBuffer(encoder, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_Locator, nameBuffer);
+        parcBuffer_Release(&nameBuffer);
+        parcMemory_Deallocate(&nameString);
+    }
+
+    size_t dataSize = ccnxManifestHashGroup_GetDataSize(group);
+    if (dataSize > 0) {
+        length += ccnxCodecTlvEncoder_AppendUint64(encoder, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_DataSize, dataSize);
+    }
+
+    size_t blockSize = ccnxManifestHashGroup_GetBlockSize(group);
+    if (blockSize > 0) {
+        length += ccnxCodecTlvEncoder_AppendUint64(encoder, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_BlockSize, blockSize);
+    }
+
+    size_t entrySize = ccnxManifestHashGroup_GetEntrySize(group);
+    if (entrySize > 0) {
+        length += ccnxCodecTlvEncoder_AppendUint64(encoder, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_EntrySize, entrySize);
+    }
+
+    size_t treeSize = ccnxManifestHashGroup_GetTreeHeight(group);
+    if (treeSize > 0) {
+        length += ccnxCodecTlvEncoder_AppendUint64(encoder, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_TreeHeight, treeSize);
+    }
+
+    const PARCBuffer *dataDigest = ccnxManifestHashGroup_GetOverallDataDigest(group);
+    if (dataDigest != NULL) {
+        length += ccnxCodecTlvEncoder_AppendBuffer(encoder, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_OverallDataSha256, (PARCBuffer *) dataDigest);
+    }
+
+    // Rewind back to the container opening and fill in the length
+    size_t endPosition = ccnxCodecTlvEncoder_Position(encoder);
+    ccnxCodecTlvEncoder_PutUint16(encoder, startPosition, CCNxCodecSchemaV1Types_CCNxManifestHashGroup_Metadata);
+    ccnxCodecTlvEncoder_PutUint16(encoder, startPosition + 2, length);
+    ccnxCodecTlvEncoder_SetPosition(encoder, endPosition);
+
+    return endPosition - startPosition;
+}
+
+ssize_t
+ccnxCodecSchemaV1ManifestEncoder_Encode(CCNxCodecTlvEncoder *encoder, CCNxTlvDictionary *packetDictionary)
+{
+    ssize_t length = 0;
+
+    ssize_t numHashGroups = ccnxTlvDictionary_ListSize(packetDictionary, CCNxCodecSchemaV1TlvDictionary_Lists_HASH_GROUP_LIST);
+    for (size_t i = 0; i < numHashGroups; i++) {
+        // Skip past the TL of the hash group to append the pointers inside
+        ssize_t groupLength = 0;
+        ccnxCodecTlvEncoder_AppendContainer(encoder, CCNxCodecSchemaV1Types_CCNxMessage_HashGroup, groupLength);
+
+        CCNxManifestInterface *interface = ccnxManifestInterface_GetInterface(packetDictionary);
+        CCNxManifestHashGroup *group = interface->getHashGroup(packetDictionary, i);
+
+        // Encode any metadata, if present.
+        if (ccnxManifestHashGroup_HasMetadata(group)) {
+            groupLength += _appendMetadata(encoder, group);
+        }
+
+        // Append the HashGroup pointers
+        size_t numPointers = ccnxManifestHashGroup_GetNumberOfPointers(group);
+        for (size_t p = 0; p < numPointers; p++) {
+            CCNxManifestHashGroupPointer *ptr = ccnxManifestHashGroup_GetPointerAtIndex(group, p);
+            ssize_t ptrLength = _appendPointer(encoder, ptr);
+            if (ptrLength < 0) {
+                return ptrLength;
+            }
+            groupLength += ptrLength;
+        }
+
+        // Now that we know the overall length, rewind back to the start and append the TL
+        // part of the container.
+        size_t endPosition = ccnxCodecTlvEncoder_Position(encoder);
+        ssize_t offset = endPosition - groupLength - 4;
+        ccnxCodecTlvEncoder_PutUint16(encoder, offset, CCNxCodecSchemaV1Types_CCNxMessage_HashGroup);
+        ccnxCodecTlvEncoder_PutUint16(encoder, offset + 2, groupLength);
+        ccnxCodecTlvEncoder_SetPosition(encoder, endPosition);
+
+        length += groupLength + 4;
+
+        ccnxManifestHashGroup_Release(&group);
+    }
+
+    return length;
+}