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Util: Add CircleBufferWriteTruncate

This commit is contained in:
Vicki Pfau 2024-04-12 21:31:06 -07:00
parent 6d2109dd48
commit c689a7fd48
3 changed files with 35 additions and 0 deletions
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1
include/mgba-util/circle-buffer.h
View File

@ -27,6 +27,7 @@ int CircleBufferWrite8(struct CircleBuffer* buffer, int8_t value);
int CircleBufferWrite16(struct CircleBuffer* buffer, int16_t value);
int CircleBufferWrite32(struct CircleBuffer* buffer, int32_t value);
size_t CircleBufferWrite(struct CircleBuffer* buffer, const void* input, size_t length);
size_t CircleBufferWriteTruncate(struct CircleBuffer* buffer, const void* input, size_t length);
int CircleBufferRead8(struct CircleBuffer* buffer, int8_t* value);
int CircleBufferRead16(struct CircleBuffer* buffer, int16_t* value);
int CircleBufferRead32(struct CircleBuffer* buffer, int32_t* value);

7
src/util/circle-buffer.c
View File

@ -153,6 +153,13 @@ size_t CircleBufferWrite(struct CircleBuffer* buffer, const void* input, size_t
return length;
}
size_t CircleBufferWriteTruncate(struct CircleBuffer* buffer, const void* input, size_t length) {
if (buffer->size + length > buffer->capacity) {
length = buffer->capacity - buffer->size;
}
return CircleBufferWrite(buffer, input, length);
}
int CircleBufferRead8(struct CircleBuffer* buffer, int8_t* value) {
int8_t* data = buffer->readPtr;
if (buffer->size < sizeof(int8_t)) {

27
src/util/test/circle-buffer.c
View File

@ -196,6 +196,32 @@ M_TEST_DEFINE(writeLenCapacity) {
CircleBufferDeinit(&buffer);
}
M_TEST_DEFINE(writeTruncate) {
struct CircleBuffer buffer;
const char* data = " Lorem ipsum dolor sit amet, consectetur adipiscing elit placerat.";
char databuf[64];
CircleBufferInit(&buffer, 64);
assert_int_equal(CircleBufferWriteTruncate(&buffer, data, 64), 64);
assert_int_equal(CircleBufferSize(&buffer), 64);
assert_int_equal(CircleBufferRead(&buffer, databuf, 64), 64);
assert_int_equal(CircleBufferSize(&buffer), 0);
assert_memory_equal(data, databuf, 64);
assert_int_equal(CircleBufferWriteTruncate(&buffer, data, 48), 48);
assert_int_equal(CircleBufferSize(&buffer), 48);
assert_int_equal(CircleBufferWrite(&buffer, data, 48), 0);
assert_int_equal(CircleBufferSize(&buffer), 48);
assert_int_equal(CircleBufferWriteTruncate(&buffer, data, 48), 16);
assert_int_equal(CircleBufferSize(&buffer), 64);
assert_int_equal(CircleBufferRead(&buffer, databuf, 64), 64);
assert_memory_equal(data, databuf, 48);
assert_memory_equal(data, &databuf[48], 16);
CircleBufferDeinit(&buffer);
}
M_TEST_DEFINE(dumpBasic) {
struct CircleBuffer buffer;
const char* data = " Lorem ipsum dolor sit amet, consectetur adipiscing elit placerat.";
@ -284,6 +310,7 @@ M_TEST_SUITE_DEFINE(CircleBuffer,
cmocka_unit_test(capacity),
cmocka_unit_test(overCapacity16),
cmocka_unit_test(writeLenCapacity),
cmocka_unit_test(writeTruncate),
cmocka_unit_test(dumpBasic),
cmocka_unit_test(dumpOffset),
)