cubeb-sys 0.36.0

Native bindings to the cubeb library
Documentation 
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#include "cubeb_utils.h"
#include "gtest/gtest.h"

TEST(cubeb, auto_array)
{
  auto_array<uint32_t> array;
  auto_array<uint32_t> array2(10);
  uint32_t a[10];

  ASSERT_EQ(array2.length(), 0u);
  ASSERT_EQ(array2.capacity(), 10u);

  for (uint32_t i = 0; i < 10; i++) {
    a[i] = i;
  }

  ASSERT_EQ(array.capacity(), 0u);
  ASSERT_EQ(array.length(), 0u);

  array.push(a, 10);

  array.reserve(9);

  for (uint32_t i = 0; i < 10; i++) {
    ASSERT_EQ(array.data()[i], i);
  }

  ASSERT_EQ(array.capacity(), 10u);
  ASSERT_EQ(array.length(), 10u);

  uint32_t b[10];

  array.pop(b, 5);

  ASSERT_EQ(array.capacity(), 10u);
  ASSERT_EQ(array.length(), 5u);
  for (uint32_t i = 0; i < 5; i++) {
    ASSERT_EQ(b[i], i);
    ASSERT_EQ(array.data()[i], 5 + i);
  }
  uint32_t * bb = b + 5;
  array.pop(bb, 5);

  ASSERT_EQ(array.capacity(), 10u);
  ASSERT_EQ(array.length(), 0u);
  for (uint32_t i = 0; i < 5; i++) {
    ASSERT_EQ(bb[i], 5 + i);
  }

  ASSERT_TRUE(!array.pop(nullptr, 1));

  array.push(a, 10);
  array.push(a, 10);

  for (uint32_t j = 0; j < 2; j++) {
    for (uint32_t i = 0; i < 10; i++) {
      ASSERT_EQ(array.data()[10 * j + i], i);
    }
  }
  ASSERT_EQ(array.length(), 20u);
  ASSERT_EQ(array.capacity(), 20u);
  array.pop(nullptr, 5);

  for (uint32_t i = 0; i < 5; i++) {
    ASSERT_EQ(array.data()[i], 5 + i);
  }

  ASSERT_EQ(array.length(), 15u);
  ASSERT_EQ(array.capacity(), 20u);
}

TEST(cubeb, auto_array_reserve_no_realloc)
{
  auto_array<float> array(128);
  float * ptr = array.data();

  // reserve at or below current capacity must not reallocate
  for (size_t i = 0; i <= 128; i++) {
    array.reserve(i);
    ASSERT_EQ(array.data(), ptr);
    ASSERT_EQ(array.capacity(), 128u);
  }

  // push within capacity must not reallocate
  float buf[64] = {};
  array.push(buf, 64);
  ASSERT_EQ(array.data(), ptr);

  // reserve still within capacity after push
  array.reserve(100);
  ASSERT_EQ(array.data(), ptr);
  ASSERT_EQ(array.capacity(), 128u);
}

TEST(cubeb, auto_array_growth_amortized)
{
  auto_array<float> array;
  float val = 0.0f;

  array.push(&val, 1);
  size_t cap_after_first = array.capacity();
  ASSERT_GE(cap_after_first, 1u);

  // Force growth: push more than current capacity
  float buf[128] = {};
  size_t old_cap = array.capacity();
  array.push(buf, old_cap + 1);

  // Capacity should have at least doubled
  ASSERT_GE(array.capacity(), old_cap * 2);
}