TEST(WireFormat, StructRoundTrip_OneSegment) {
Session ctx;
setupStruct(&ctx.capn);
// word count:
// 1 root reference
// 8 root struct
// 1 sub message
// 2 3-element int32 list
// 13 struct list
// 1 tag
// 12 4x struct
// 1 data segment
// 1 reference segment
// 1 sub-struct
// 11 list list
// 5 references to sub-lists
// 6 sub-lists (4x 1 word, 1x 2 words)
// 2 recurse
// -----
// 38
ASSERT_EQ(1, ctx.capn.segnum);
EXPECT_EQ(38*8, ctx.capn.seglist->len);
checkStruct(&ctx.capn);
struct capn ctx2;
memset(&ctx2, 0, sizeof(ctx2));
capn_append_segment(&ctx2, ctx.capn.seglist);
checkStruct(&ctx2);
}
TEST(WireFormat, StructRoundTrip_OneSegmentPerAllocation_NoTag) {
Session ctx;
ctx.capn.create = &CreateSmallSegment;
g_AddTag = 0;
setupStruct(&ctx.capn);
g_AddTag = 1;
struct capn_segment *segments[31];
getSegments(&ctx.capn, segments, 31);
// Check that each segment has the expected size. Note that we have plenty
// of 16 byte double far ptrs.
EXPECT_EQ( 8, segments[ 0]->len); // root ref
EXPECT_EQ(64, segments[ 1]->len); // root struct
EXPECT_EQ(16, segments[ 2]->len); // root struct ptr
EXPECT_EQ( 8, segments[ 3]->len); // sub-struct
EXPECT_EQ(16, segments[ 4]->len); // sub-struct ptr
EXPECT_EQ(16, segments[ 5]->len); // 3-element int32 list
EXPECT_EQ(16, segments[ 6]->len); // 3-element int32 list ptr
EXPECT_EQ(72, segments[ 7]->len); // struct list
EXPECT_EQ(16, segments[ 8]->len); // struct list ptr
EXPECT_EQ( 8, segments[ 9]->len); // struct list substruct 1
EXPECT_EQ(16, segments[10]->len); // struct list substruct 1 ptr
EXPECT_EQ( 8, segments[11]->len); // struct list substruct 2
EXPECT_EQ(16, segments[12]->len); // struct list substruct 2 ptr
EXPECT_EQ( 8, segments[13]->len); // struct list substruct 3
EXPECT_EQ(16, segments[14]->len); // struct list substruct 3 ptr
EXPECT_EQ( 8, segments[15]->len); // struct list substruct 4
EXPECT_EQ(16, segments[16]->len); // struct list substruct 4 ptr
EXPECT_EQ(40, segments[17]->len); // list list
EXPECT_EQ(16, segments[18]->len); // list list ptr
EXPECT_EQ( 8, segments[19]->len); // list list sublist 1
EXPECT_EQ(16, segments[20]->len); // list list sublist 1 ptr
EXPECT_EQ( 8, segments[21]->len); // list list sublist 2
EXPECT_EQ(16, segments[22]->len); // list list sublist 2 ptr
EXPECT_EQ( 8, segments[23]->len); // list list sublist 3
EXPECT_EQ(16, segments[24]->len); // list list sublist 3 ptr
EXPECT_EQ( 8, segments[25]->len); // list list sublist 4
EXPECT_EQ(16, segments[26]->len); // list list sublist 4 ptr
EXPECT_EQ(16, segments[27]->len); // list list sublist 5
EXPECT_EQ(16, segments[28]->len); // list list sublist 5 ptr
EXPECT_EQ(16, segments[29]->len); // recurse struct
EXPECT_EQ(16, segments[30]->len); // recurse struct ptr
checkStruct(&ctx.capn);
struct capn ctx2;
memset(&ctx2, 0, sizeof(ctx2));
for (int i = 0; i < sizeof(segments)/sizeof(segments[0]); i++) {
capn_append_segment(&ctx2, segments[i]);
}
checkStruct(&ctx2);
}
TEST(WireFormat, SimpleRawDataStruct) {
AlignedData<2> data = {{
// Struct ref, offset = 1, dataSize = 1, referenceCount = 0
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
// Content for the data segment.
0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef
}};
struct capn_segment seg;
memset(&seg, 0, sizeof(seg));
seg.data = (char*) data.bytes;
seg.len = seg.cap = sizeof(data.bytes);
struct capn ctx;
memset(&ctx, 0, sizeof(ctx));
capn_append_segment(&ctx, &seg);
EXPECT_EQ(&seg, ctx.seglist);
EXPECT_EQ(&seg, ctx.lastseg);
EXPECT_EQ(&seg.hdr, ctx.segtree);
EXPECT_EQ(1, ctx.segnum);
EXPECT_EQ(0, seg.id);
struct capn_ptr ptr = capn_getp(capn_root(&ctx), 0, 1);
EXPECT_EQ(CAPN_STRUCT, ptr.type);
EXPECT_EQ(8, ptr.datasz);
EXPECT_EQ(0, ptr.ptrs);
EXPECT_EQ(UINT64_C(0xefcdab8967452301), capn_read64(ptr, 0));
EXPECT_EQ(UINT64_C(0), capn_read64(ptr, 8));
EXPECT_EQ(UINT32_C(0x67452301), capn_read32(ptr, 0));
EXPECT_EQ(UINT32_C(0xefcdab89), capn_read32(ptr, 4));
EXPECT_EQ(UINT32_C(0), capn_read32(ptr, 8));
EXPECT_EQ(UINT16_C(0x2301), capn_read16(ptr, 0));
EXPECT_EQ(UINT16_C(0x6745), capn_read16(ptr, 2));
EXPECT_EQ(UINT16_C(0xab89), capn_read16(ptr, 4));
EXPECT_EQ(UINT16_C(0xefcd), capn_read16(ptr, 6));
EXPECT_EQ(UINT16_C(0), capn_read16(ptr, 8));
}
TEST(WireFormat, StructRoundTrip_MultipleSegmentsWithMultipleAllocations) {
Session ctx;
ctx.capn.create = &CreateSegment64;
setupStruct(&ctx.capn);
// Verify that we made 6 segments.
ASSERT_EQ(6, ctx.capn.segnum);
struct capn_segment *segments[6];
segments[0] = ctx.capn.seglist;
for (int i = 1; i < 6; i++) {
segments[i] = segments[i-1]->next;
}
for (int i = 0; i < 6; i++) {
EXPECT_EQ(segments[i]->id, i);
}
// Check that each segment has the expected size. Recall that each object will be prefixed by an
// extra word if its parent is in a different segment.
EXPECT_EQ(64, segments[0]->len); // root ref (8), sub-struct (8+tag), 3-element list (16+tag), list substruct 1 (8+tag)
EXPECT_EQ(72, segments[1]->len); // root struct (64+tag)
EXPECT_EQ(80, segments[2]->len); // struct list (72+tag)
EXPECT_EQ(64, segments[3]->len); // list substruct 2,3,4 3*(8+tag), sublist 3 (8+tag)
EXPECT_EQ(64, segments[4]->len); // list list (40+tag), sublist 1,2 2*8
EXPECT_EQ(64, segments[5]->len); // sublist 4 (8+tag), 5 (16+tag), recurse struct (16+tag)
checkStruct(&ctx.capn);
struct capn ctx2;
memset(&ctx2, 0, sizeof(ctx2));
for (int i = 0; i < sizeof(segments)/sizeof(segments[0]); i++) {
capn_append_segment(&ctx2, segments[i]);
}
checkStruct(&ctx2);
}
TEST(WireFormat, StructRoundTrip_OneSegmentPerAllocation) {
Session ctx;
ctx.capn.create = &CreateSmallSegment;
setupStruct(&ctx.capn);
struct capn_segment *segments[16];
getSegments(&ctx.capn, segments, 16);
// Check that each segment has the expected size. Recall that the first word of each segment will
// actually be a reference to the first thing allocated within that segment.
EXPECT_EQ( 8, segments[ 0]->len); // root ref
EXPECT_EQ(72, segments[ 1]->len); // root struct
EXPECT_EQ(16, segments[ 2]->len); // sub-struct
EXPECT_EQ(24, segments[ 3]->len); // 3-element int32 list
EXPECT_EQ(80, segments[ 4]->len); // struct list
EXPECT_EQ(16, segments[ 5]->len); // struct list substruct 1
EXPECT_EQ(16, segments[ 6]->len); // struct list substruct 2
EXPECT_EQ(16, segments[ 7]->len); // struct list substruct 3
EXPECT_EQ(16, segments[ 8]->len); // struct list substruct 4
EXPECT_EQ(48, segments[ 9]->len); // list list
EXPECT_EQ(16, segments[10]->len); // list list sublist 1
EXPECT_EQ(16, segments[11]->len); // list list sublist 2
EXPECT_EQ(16, segments[12]->len); // list list sublist 3
EXPECT_EQ(16, segments[13]->len); // list list sublist 4
EXPECT_EQ(24, segments[14]->len); // list list sublist 5
EXPECT_EQ(24, segments[15]->len); // recurse struct
checkStruct(&ctx.capn);
struct capn ctx2;
memset(&ctx2, 0, sizeof(ctx2));
for (int i = 0; i < sizeof(segments)/sizeof(segments[0]); i++) {
capn_append_segment(&ctx2, segments[i]);
}
checkStruct(&ctx2);
}
static int init_fp(struct capn *c, FILE *f, struct capn_stream *z, int packed) {
/*
* Initialize 'c' from the contents of 'f', assuming the message has been
* serialized with the standard framing format. From https://capnproto.org/encoding.html:
*
* When transmitting over a stream, the following should be sent. All integers are unsigned and little-endian.
* (4 bytes) The number of segments, minus one (since there is always at least one segment).
* (N * 4 bytes) The size of each segment, in words.
* (0 or 4 bytes) Padding up to the next word boundary.
* The content of each segment, in order.
*/
struct capn_segment *s = NULL;
uint32_t i, segnum, total = 0;
uint32_t hdr[1024];
uint8_t zbuf[ZBUF_SZ];
char *data = NULL;
capn_init_malloc(c);
/* Read the first four bytes to know how many headers we have */
if (read_fp(&segnum, 4, f, z, zbuf, packed))
goto err;
segnum = capn_flip32(segnum);
if (segnum > 1023)
goto err;
segnum++; /* The wire encoding was zero-based */
/* Read the header list */
if (read_fp(hdr, 8 * (segnum/2) + 4, f, z, zbuf, packed))
goto err;
for (i = 0; i < segnum; i++) {
uint32_t n = capn_flip32(hdr[i]);
if (n > INT_MAX/8 || n > UINT32_MAX/8 || UINT32_MAX - total < n*8)
goto err;
hdr[i] = n*8;
total += hdr[i];
}
/* Allocate space for the data and the capn_segment structs */
s = (struct capn_segment*) calloc(1, total + (sizeof(*s) * segnum));
if (!s)
goto err;
/* Now read the data and setup the capn_segment structs */
data = (char*) (s+segnum);
if (read_fp(data, total, f, z, zbuf, packed))
goto err;
for (i = 0; i < segnum; i++) {
s[i].len = s[i].cap = hdr[i];
s[i].data = data;
data += s[i].len;
capn_append_segment(c, &s[i]);
}
/* Set the entire region to be freed on the last segment */
s[segnum-1].user = s;
return 0;
err:
memset(c, 0, sizeof(*c));
free(s);
return -1;
}