af73181cf4
NEWS: * Switching endianness mid-byte no longer potentially re-reads bytes. * bit_offset now consistently refers to the number of bits already read. * HParsedTokens now have a bit_length field; this is a size_t. This may be removed for memory reasons. The bit writer has not yet been updated to match; the result of switching bit writer endianness in the middle of a byte remains undefined.
67 lines
2.7 KiB
C
67 lines
2.7 KiB
C
#include <stdint.h>
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#include <glib.h>
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#include "hammer.h"
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#include "internal.h"
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#include "test_suite.h"
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#define MK_INPUT_STREAM(buf,len,endianness_) \
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{ \
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.input = (uint8_t*)buf, \
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.length = len, \
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.index = 0, \
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.bit_offset = 0, \
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.endianness = endianness_ \
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}
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static void test_bitreader_ints(void) {
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HInputStream is = MK_INPUT_STREAM("\xFF\xFF\xFF\xFE\x00\x00\x00\x00", 8, BIT_BIG_ENDIAN | BYTE_BIG_ENDIAN);
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g_check_cmp_int64(h_read_bits(&is, 64, true), ==, -0x200000000);
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}
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static void test_bitreader_be(void) {
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HInputStream is = MK_INPUT_STREAM("\x6A\x5A", 2, BIT_BIG_ENDIAN | BYTE_BIG_ENDIAN);
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g_check_cmp_int32(h_read_bits(&is, 3, false), ==, 0x03);
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g_check_cmp_int32(h_read_bits(&is, 8, false), ==, 0x52);
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g_check_cmp_int32(h_read_bits(&is, 5, false), ==, 0x1A);
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}
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static void test_bitreader_le(void) {
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HInputStream is = MK_INPUT_STREAM("\x6A\x5A", 2, BIT_LITTLE_ENDIAN | BYTE_LITTLE_ENDIAN);
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g_check_cmp_int32(h_read_bits(&is, 3, false), ==, 0x02);
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g_check_cmp_int32(h_read_bits(&is, 8, false), ==, 0x4D);
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g_check_cmp_int32(h_read_bits(&is, 5, false), ==, 0x0B);
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}
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static void test_largebits_be(void) {
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HInputStream is = MK_INPUT_STREAM("\x6A\x5A", 2, BIT_BIG_ENDIAN | BYTE_BIG_ENDIAN);
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g_check_cmp_int32(h_read_bits(&is, 11, false), ==, 0x352);
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g_check_cmp_int32(h_read_bits(&is, 5, false), ==, 0x1A);
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}
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static void test_largebits_le(void) {
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HInputStream is = MK_INPUT_STREAM("\x6A\x5A", 2, BIT_LITTLE_ENDIAN | BYTE_LITTLE_ENDIAN);
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g_check_cmp_int32(h_read_bits(&is, 11, false), ==, 0x26A);
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g_check_cmp_int32(h_read_bits(&is, 5, false), ==, 0x0B);
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}
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static void test_offset_largebits_be(void) {
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HInputStream is = MK_INPUT_STREAM("\x6A\x5A", 2, BIT_BIG_ENDIAN | BYTE_BIG_ENDIAN);
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g_check_cmp_int32(h_read_bits(&is, 5, false), ==, 0xD);
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g_check_cmp_int32(h_read_bits(&is, 11, false), ==, 0x25A);
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}
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static void test_offset_largebits_le(void) {
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HInputStream is = MK_INPUT_STREAM("\x6A\x5A", 2, BIT_LITTLE_ENDIAN | BYTE_LITTLE_ENDIAN);
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g_check_cmp_int32(h_read_bits(&is, 5, false), ==, 0xA);
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g_check_cmp_int32(h_read_bits(&is, 11, false), ==, 0x2D3);
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}
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void register_bitreader_tests(void) {
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g_test_add_func("/core/bitreader/be", test_bitreader_be);
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g_test_add_func("/core/bitreader/le", test_bitreader_le);
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g_test_add_func("/core/bitreader/largebits-be", test_largebits_be);
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g_test_add_func("/core/bitreader/largebits-le", test_largebits_le);
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g_test_add_func("/core/bitreader/offset-largebits-be", test_offset_largebits_be);
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g_test_add_func("/core/bitreader/offset-largebits-le", test_offset_largebits_le);
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g_test_add_func("/core/bitreader/ints", test_bitreader_ints);
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}
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