MetisTlvName *
metisTlvName_CreateFromCCNxName(const CCNxName *ccnxName)
{
// to avoid reallocs, calculate the exact size we need
size_t memoryLength = 0;
for (size_t i = 0; i < ccnxName_GetSegmentCount(ccnxName); i++) {
CCNxNameSegment *segment = ccnxName_GetSegment(ccnxName, i);
memoryLength += 4 + ccnxNameSegment_Length(segment);
}
MetisTlvName *name = parcMemory_AllocateAndClear(sizeof(MetisTlvName));
assertNotNull(name, "parcMemory_AllocateAndClear(%zu) returned NULL", sizeof(MetisTlvName));
name->memoryLength = memoryLength;
name->memory = parcMemory_Allocate(memoryLength);
assertNotNull(name->memory, "parcMemory_Allocate(%zu) returned NULL", memoryLength);
uint8_t *p = name->memory;
uint8_t *end = p + memoryLength;
for (size_t i = 0; i < ccnxName_GetSegmentCount(ccnxName); i++) {
CCNxNameSegment *segment = ccnxName_GetSegment(ccnxName, i);
uint16_t type = ccnxNameSegment_GetType(segment);
uint16_t length = ccnxNameSegment_Length(segment);
*(uint16_t *) p = htons(type);
p += 2;
*(uint16_t *) p = htons(length);
p += 2;
if (length >0) {
PARCBuffer *buffer = ccnxNameSegment_GetValue(segment);
uint8_t *overlay = parcBuffer_Overlay(buffer, 0);
memcpy(p, overlay, length);
p += length;
}
// sanity check
assertTrue(p <= end, "Wrote past the end of buffer, now at %p end at %p", p, end);
}
_setup(name);
return name;
}
PARCBufferComposer *
ccnxNameSegment_BuildString(const CCNxNameSegment *segment, PARCBufferComposer *composer)
{
ccnxNameLabel_BuildString(segment->label, composer);
if (ccnxNameSegment_Length(segment) > 0) {
PARCURISegment *uriSegment = parcURISegment_CreateFromBuffer(ccnxNameSegment_GetValue(segment));
parcURISegment_BuildString(uriSegment, composer);
parcURISegment_Release(&uriSegment);
}
return composer;
}
int
ccnxNameSegment_Compare(const CCNxNameSegment *segmentA, const CCNxNameSegment *segmentB)
{
if (segmentA == NULL) {
if (segmentB == NULL) {
return 0;
}
return -1;
} else {
if (segmentB == NULL) {
return +1;
}
}
if (ccnxNameSegment_Length(segmentA) < ccnxNameSegment_Length(segmentB)) {
return -1;
}
if (ccnxNameSegment_Length(segmentA) > ccnxNameSegment_Length(segmentB)) {
return +1;
}
int result = parcBuffer_Compare(ccnxNameSegment_GetValue(segmentA), ccnxNameSegment_GetValue(segmentB));
return result;
}
