1 /* test_small_buffers.cc - Test deflate() and inflate() with small buffers */
2
3 #include "zbuild.h"
4 #ifdef ZLIB_COMPAT
5 # include "zlib.h"
6 #else
7 # include "zlib-ng.h"
8 #endif
9
10 #include <stdio.h>
11 #include <stdint.h>
12 #include <stdlib.h>
13 #include <string.h>
14
15 #include "test_shared.h"
16
17 #include <gtest/gtest.h>
18
TEST(deflate,small_buffers)19 TEST(deflate, small_buffers) {
20 PREFIX3(stream) c_stream, d_stream;
21 uint8_t compr[128], uncompr[128];
22 z_size_t compr_len = sizeof(compr), uncompr_len = sizeof(uncompr);
23 int err;
24
25 memset(&c_stream, 0, sizeof(c_stream));
26 memset(&d_stream, 0, sizeof(d_stream));
27
28 err = PREFIX(deflateInit)(&c_stream, Z_DEFAULT_COMPRESSION);
29 EXPECT_EQ(err, Z_OK);
30
31 c_stream.next_in = (z_const unsigned char *)hello;
32 c_stream.next_out = compr;
33
34 while (c_stream.total_in != hello_len && c_stream.total_out < compr_len) {
35 c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
36 err = PREFIX(deflate)(&c_stream, Z_NO_FLUSH);
37 EXPECT_EQ(err, Z_OK);
38 }
39 /* Finish the stream, still forcing small buffers */
40 for (;;) {
41 c_stream.avail_out = 1;
42 err = PREFIX(deflate)(&c_stream, Z_FINISH);
43 if (err == Z_STREAM_END) break;
44 EXPECT_EQ(err, Z_OK);
45 }
46
47 err = PREFIX(deflateEnd)(&c_stream);
48 EXPECT_EQ(err, Z_OK);
49
50 strcpy((char*)uncompr, "garbage");
51
52 d_stream.next_in = compr;
53 d_stream.next_out = uncompr;
54
55 err = PREFIX(inflateInit)(&d_stream);
56 EXPECT_EQ(err, Z_OK);
57
58 while (d_stream.total_out < uncompr_len && d_stream.total_in < compr_len) {
59 d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
60 err = PREFIX(inflate)(&d_stream, Z_NO_FLUSH);
61 if (err == Z_STREAM_END) break;
62 EXPECT_EQ(err, Z_OK);
63 }
64
65 err = PREFIX(inflateEnd)(&d_stream);
66 EXPECT_EQ(err, Z_OK);
67
68 EXPECT_STREQ((char*)uncompr, hello);
69 }
70