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axmol/core/base/ccUtils.cpp

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/****************************************************************************
Copyright (c) 2010 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
Copyright (c) 2020 C4games Ltd
Copyright (c) 2021-2023 Bytedance Inc.
https://axmolengine.github.io/
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "base/ccUtils.h"
#include <cmath>
#include <stdlib.h>
#include <signal.h>
#if !defined(_WIN32)
// for unix/linux kill
# include <unistd.h>
#endif
#include "openssl/evp.h"
#include "base/CCDirector.h"
#include "base/CCAsyncTaskPool.h"
#include "base/CCEventDispatcher.h"
#include "base/ccConstants.h"
#include "base/ccUTF8.h"
#include "renderer/CCCustomCommand.h"
#include "renderer/CCRenderer.h"
#include "renderer/CCTextureCache.h"
#include "renderer/CCRenderState.h"
#include "renderer/backend/Types.h"
#include "renderer/backend/PixelBufferDescriptor.h"
#include "platform/CCImage.h"
#include "platform/CCFileUtils.h"
#include "2d/CCSprite.h"
#include "2d/CCRenderTexture.h"
#include "base/base64.h"
using namespace std::string_view_literals;
NS_AX_BEGIN
int ccNextPOT(int x)
{
x = x - 1;
x = x | (x >> 1);
x = x | (x >> 2);
x = x | (x >> 4);
x = x | (x >> 8);
x = x | (x >> 16);
return x + 1;
}
namespace utils
{
namespace base64
{
inline int encBound(int sourceLen)
{
return (sourceLen + 2) / 3 * 4;
}
inline int decBound(int sourceLen)
{
return sourceLen / 4 * 3 + 1;
}
} // namespace base64
/*
* Capture screen interface
*/
static EventListenerCustom* s_captureScreenListener;
void captureScreen(std::function<void(RefPtr<Image>)> imageCallback)
{
if (s_captureScreenListener)
{
AXLOG("Warning: CaptureScreen has been called already, don't call more than once in one frame.");
return;
}
auto director = Director::getInstance();
auto renderer = director->getRenderer();
auto eventDispatcher = director->getEventDispatcher();
// !!!Metal: needs setFrameBufferOnly before draw
#if defined(AX_USE_METAL)
s_captureScreenListener =
eventDispatcher->addCustomEventListener(Director::EVENT_BEFORE_DRAW, [=](EventCustom* /*event*/) {
#else
s_captureScreenListener =
eventDispatcher->addCustomEventListener(Director::EVENT_AFTER_DRAW, [=](EventCustom* /*event*/) {
#endif
eventDispatcher->removeEventListener(s_captureScreenListener);
s_captureScreenListener = nullptr;
// !!!GL: AFTER_DRAW and BEFORE_END_FRAME
renderer->readPixels(renderer->getDefaultRenderTarget(), [=](const backend::PixelBufferDescriptor& pbd) {
if (pbd)
{
auto image = utils::makeInstance<Image>(&Image::initWithRawData, pbd._data.getBytes(),
pbd._data.getSize(), pbd._width, pbd._height, 8, false);
imageCallback(image);
}
else
imageCallback(nullptr);
});
});
}
static std::unordered_map<Node*, EventListenerCustom*> s_captureNodeListener;
void captureNode(Node* startNode, std::function<void(RefPtr<Image>)> imageCallback, float scale)
{
if (s_captureNodeListener.find(startNode) != s_captureNodeListener.end())
{
AXLOG("Warning: current node has been captured already");
return;
}
auto callback = [startNode, scale, imageCallback](EventCustom* /*event*/) {
auto director = Director::getInstance();
auto captureNodeListener = s_captureNodeListener[startNode];
director->getEventDispatcher()->removeEventListener((EventListener*)(captureNodeListener));
s_captureNodeListener.erase(startNode);
auto& size = startNode->getContentSize();
director->setNextDeltaTimeZero(true);
RenderTexture* finalRtx = nullptr;
auto rtx =
RenderTexture::create(size.width, size.height, backend::PixelFormat::RGBA8, PixelFormat::D24S8, false);
// rtx->setKeepMatrix(true);
Point savedPos = startNode->getPosition();
Point anchor;
if (!startNode->isIgnoreAnchorPointForPosition())
{
anchor = startNode->getAnchorPoint();
}
startNode->setPosition(Point(size.width * anchor.x, size.height * anchor.y));
rtx->begin();
startNode->visit();
rtx->end();
startNode->setPosition(savedPos);
if (std::abs(scale - 1.0f) < 1e-6f /* no scale */)
finalRtx = rtx;
else
{
/* scale */
auto finalRect = Rect(0, 0, size.width, size.height);
Sprite* sprite = Sprite::createWithTexture(rtx->getSprite()->getTexture(), finalRect);
sprite->setAnchorPoint(Point(0, 0));
sprite->setFlippedY(true);
finalRtx = RenderTexture::create(size.width * scale, size.height * scale, backend::PixelFormat::RGBA8,
PixelFormat::D24S8, false);
sprite->setScale(scale); // or use finalRtx->setKeepMatrix(true);
finalRtx->begin();
sprite->visit();
finalRtx->end();
}
director->getRenderer()->render();
finalRtx->newImage(imageCallback);
};
auto listener =
Director::getInstance()->getEventDispatcher()->addCustomEventListener(Director::EVENT_BEFORE_DRAW, callback);
s_captureNodeListener[startNode] = listener;
}
// [DEPRECATED]
void captureScreen(std::function<void(bool, std::string_view)> afterCap, std::string_view filename)
{
std::string outfile;
if (FileUtils::getInstance()->isAbsolutePath(filename))
outfile = filename;
else
outfile = FileUtils::getInstance()->getWritablePath().append(filename);
captureScreen([_afterCap = std::move(afterCap), _outfile = std::move(outfile)](RefPtr<Image> image) mutable {
AsyncTaskPool::getInstance()->enqueue(
AsyncTaskPool::TaskType::TASK_IO,
[_afterCap = std::move(_afterCap), image = std::move(image), _outfile = std::move(_outfile)]() mutable {
bool ok = image->saveToFile(_outfile);
Director::getInstance()->getScheduler()->runOnAxmolThread(
[ok, _afterCap = std::move(_afterCap), _outfile = std::move(_outfile)] {
_afterCap(ok, _outfile);
});
});
});
}
std::vector<Node*> findChildren(const Node& node, std::string_view name)
{
std::vector<Node*> vec;
node.enumerateChildren(name, [&vec](Node* nodeFound) -> bool {
vec.emplace_back(nodeFound);
return false;
});
return vec;
}
#define MAX_ITOA_BUFFER_SIZE 256
double atof(const char* str)
{
if (str == nullptr)
{
return 0.0;
}
char buf[MAX_ITOA_BUFFER_SIZE];
strncpy(buf, str, MAX_ITOA_BUFFER_SIZE);
// strip string, only remain 7 numbers after '.'
char* dot = strchr(buf, '.');
if (dot != nullptr && dot - buf + 8 < MAX_ITOA_BUFFER_SIZE)
{
dot[8] = '\0';
}
return ::atof(buf);
}
double gettime()
{
struct timeval tv;
gettimeofday(&tv, nullptr);
return (double)tv.tv_sec + (double)tv.tv_usec / 1000000;
}
long long getTimeInMilliseconds()
{
struct timeval tv;
gettimeofday(&tv, nullptr);
return (long long)tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
Rect getCascadeBoundingBox(Node* node)
{
Rect cbb;
Vec2 contentSize = node->getContentSize();
// check all children bounding box, get maximize box
Node* child = nullptr;
bool merge = false;
for (auto&& object : node->getChildren())
{
child = dynamic_cast<Node*>(object);
if (!child->isVisible())
continue;
const Rect box = getCascadeBoundingBox(child);
if (box.size.width <= 0 || box.size.height <= 0)
continue;
if (!merge)
{
cbb = box;
merge = true;
}
else
{
cbb.merge(box);
}
}
// merge content size
if (contentSize.width > 0 && contentSize.height > 0)
{
const Rect box = RectApplyAffineTransform(Rect(0, 0, contentSize.width, contentSize.height),
node->getNodeToWorldAffineTransform());
if (!merge)
{
cbb = box;
}
else
{
cbb.merge(box);
}
}
return cbb;
}
Sprite* createSpriteFromBase64Cached(const char* base64String, const char* key)
{
Texture2D* texture = Director::getInstance()->getTextureCache()->getTextureForKey(key);
if (texture == nullptr)
{
unsigned char* decoded;
int length = base64Decode((const unsigned char*)base64String, (unsigned int)strlen(base64String), &decoded);
Image* image = new Image();
bool imageResult = image->initWithImageData(decoded, length, true);
AXASSERT(imageResult, "Failed to create image from base64!");
if (!imageResult)
{
AX_SAFE_RELEASE_NULL(image);
return nullptr;
}
texture = Director::getInstance()->getTextureCache()->addImage(image, key);
image->release();
}
Sprite* sprite = Sprite::createWithTexture(texture);
return sprite;
}
Sprite* createSpriteFromBase64(const char* base64String)
{
unsigned char* decoded;
int length = base64Decode((const unsigned char*)base64String, (unsigned int)strlen(base64String), &decoded);
Image* image = new Image();
bool imageResult = image->initWithImageData(decoded, length, decoded);
AXASSERT(imageResult, "Failed to create image from base64!");
if (!imageResult)
{
AX_SAFE_RELEASE_NULL(image);
return nullptr;
}
Texture2D* texture = new Texture2D();
texture->initWithImage(image);
texture->setAliasTexParameters();
image->release();
Sprite* sprite = Sprite::createWithTexture(texture);
texture->release();
return sprite;
}
Node* findChild(Node* levelRoot, std::string_view name)
{
if (levelRoot == nullptr || name.empty())
return nullptr;
// Find this node
auto target = levelRoot->getChildByName(name);
if (target != nullptr)
return target;
// Find recursively
for (auto&& child : levelRoot->getChildren())
{
target = findChild(child, name);
if (target != nullptr)
return target;
}
return nullptr;
}
Node* findChild(Node* levelRoot, int tag)
{
if (levelRoot == nullptr || tag == Node::INVALID_TAG)
return nullptr;
// Find this node
auto target = levelRoot->getChildByTag(tag);
if (target != nullptr)
return target;
// Find recursively
for (auto&& child : levelRoot->getChildren())
{
target = findChild(child, tag);
if (target != nullptr)
return target;
}
return nullptr;
}
std::string getFileMD5Hash(std::string_view filename)
{
Data data;
FileUtils::getInstance()->getContents(filename, &data);
return getDataMD5Hash(data);
}
std::string getDataMD5Hash(const Data& data)
{
if (data.isNull())
return std::string{};
return computeDigest(std::string_view{(const char*)data.getBytes(), (size_t)data.getSize()}, "md5"sv);
}
std::string computeDigest(std::string_view data, std::string_view algorithm, bool toHex)
{
const EVP_MD* md = nullptr;
unsigned char mdValue[EVP_MAX_MD_SIZE] = {0};
unsigned int mdLen = 0;
OpenSSL_add_all_digests();
md = EVP_get_digestbyname(algorithm.data());
if (!md || data.empty())
return std::string{};
EVP_MD_CTX* mdctx = EVP_MD_CTX_create();
EVP_DigestInit_ex(mdctx, md, nullptr);
EVP_DigestUpdate(mdctx, data.data(), data.size());
EVP_DigestFinal_ex(mdctx, mdValue, &mdLen);
EVP_MD_CTX_destroy(mdctx);
return toHex ? bin2hex(std::string_view{(const char*)mdValue, (size_t)mdLen})
: std::string{(const char*)mdValue, (size_t)mdLen};
}
LanguageType getLanguageTypeByISO2(const char* code)
{
// this function is used by all platforms to get system language
// except windows: core/platform/win32/CCApplication-win32.cpp
LanguageType ret = LanguageType::ENGLISH;
if (strncmp(code, "zh", 2) == 0)
{
ret = LanguageType::CHINESE;
}
else if (strncmp(code, "ja", 2) == 0)
{
ret = LanguageType::JAPANESE;
}
else if (strncmp(code, "fr", 2) == 0)
{
ret = LanguageType::FRENCH;
}
else if (strncmp(code, "it", 2) == 0)
{
ret = LanguageType::ITALIAN;
}
else if (strncmp(code, "de", 2) == 0)
{
ret = LanguageType::GERMAN;
}
else if (strncmp(code, "es", 2) == 0)
{
ret = LanguageType::SPANISH;
}
else if (strncmp(code, "nl", 2) == 0)
{
ret = LanguageType::DUTCH;
}
else if (strncmp(code, "ru", 2) == 0)
{
ret = LanguageType::RUSSIAN;
}
else if (strncmp(code, "hu", 2) == 0)
{
ret = LanguageType::HUNGARIAN;
}
else if (strncmp(code, "pt", 2) == 0)
{
ret = LanguageType::PORTUGUESE;
}
else if (strncmp(code, "ko", 2) == 0)
{
ret = LanguageType::KOREAN;
}
else if (strncmp(code, "ar", 2) == 0)
{
ret = LanguageType::ARABIC;
}
else if (strncmp(code, "nb", 2) == 0)
{
ret = LanguageType::NORWEGIAN;
}
else if (strncmp(code, "pl", 2) == 0)
{
ret = LanguageType::POLISH;
}
else if (strncmp(code, "tr", 2) == 0)
{
ret = LanguageType::TURKISH;
}
else if (strncmp(code, "uk", 2) == 0)
{
ret = LanguageType::UKRAINIAN;
}
else if (strncmp(code, "ro", 2) == 0)
{
ret = LanguageType::ROMANIAN;
}
else if (strncmp(code, "bg", 2) == 0)
{
ret = LanguageType::BULGARIAN;
}
else if (strncmp(code, "be", 2) == 0)
{
ret = LanguageType::BELARUSIAN;
}
return ret;
}
backend::BlendFactor toBackendBlendFactor(int factor)
{
switch (factor)
{
case GLBlendConst::ONE:
return backend::BlendFactor::ONE;
case GLBlendConst::ZERO:
return backend::BlendFactor::ZERO;
case GLBlendConst::SRC_COLOR:
return backend::BlendFactor::SRC_COLOR;
case GLBlendConst::ONE_MINUS_SRC_COLOR:
return backend::BlendFactor::ONE_MINUS_SRC_COLOR;
case GLBlendConst::SRC_ALPHA:
return backend::BlendFactor::SRC_ALPHA;
case GLBlendConst::ONE_MINUS_SRC_ALPHA:
return backend::BlendFactor::ONE_MINUS_SRC_ALPHA;
case GLBlendConst::DST_COLOR:
return backend::BlendFactor::DST_COLOR;
case GLBlendConst::ONE_MINUS_DST_COLOR:
return backend::BlendFactor::ONE_MINUS_DST_COLOR;
case GLBlendConst::DST_ALPHA:
return backend::BlendFactor::DST_ALPHA;
case GLBlendConst::ONE_MINUS_DST_ALPHA:
return backend::BlendFactor::ONE_MINUS_DST_ALPHA;
case GLBlendConst::SRC_ALPHA_SATURATE:
return backend::BlendFactor::SRC_ALPHA_SATURATE;
case GLBlendConst::BLEND_COLOR:
return backend::BlendFactor::BLEND_CLOLOR;
case GLBlendConst::CONSTANT_ALPHA:
return backend::BlendFactor::CONSTANT_ALPHA;
case GLBlendConst::ONE_MINUS_CONSTANT_ALPHA:
return backend::BlendFactor::ONE_MINUS_CONSTANT_ALPHA;
default:
assert(false);
break;
}
return backend::BlendFactor::ONE;
}
int toGLBlendFactor(backend::BlendFactor blendFactor)
{
int ret = GLBlendConst::ONE;
switch (blendFactor)
{
case backend::BlendFactor::ZERO:
ret = GLBlendConst::ZERO;
break;
case backend::BlendFactor::ONE:
ret = GLBlendConst::ONE;
break;
case backend::BlendFactor::SRC_COLOR:
ret = GLBlendConst::SRC_COLOR;
break;
case backend::BlendFactor::ONE_MINUS_SRC_COLOR:
ret = GLBlendConst::ONE_MINUS_SRC_COLOR;
break;
case backend::BlendFactor::SRC_ALPHA:
ret = GLBlendConst::SRC_ALPHA;
break;
case backend::BlendFactor::ONE_MINUS_SRC_ALPHA:
ret = GLBlendConst::ONE_MINUS_SRC_ALPHA;
break;
case backend::BlendFactor::DST_COLOR:
ret = GLBlendConst::DST_COLOR;
break;
case backend::BlendFactor::ONE_MINUS_DST_COLOR:
ret = GLBlendConst::ONE_MINUS_DST_COLOR;
break;
case backend::BlendFactor::DST_ALPHA:
ret = GLBlendConst::DST_ALPHA;
break;
case backend::BlendFactor::ONE_MINUS_DST_ALPHA:
ret = GLBlendConst::ONE_MINUS_DST_ALPHA;
break;
case backend::BlendFactor::SRC_ALPHA_SATURATE:
ret = GLBlendConst::SRC_ALPHA_SATURATE;
break;
case backend::BlendFactor::BLEND_CLOLOR:
ret = GLBlendConst::BLEND_COLOR;
break;
default:
break;
}
return ret;
}
backend::SamplerFilter toBackendSamplerFilter(int mode)
{
switch (mode)
{
case GLTexParamConst::LINEAR:
case GLTexParamConst::LINEAR_MIPMAP_LINEAR:
case GLTexParamConst::LINEAR_MIPMAP_NEAREST:
case GLTexParamConst::NEAREST_MIPMAP_LINEAR:
return backend::SamplerFilter::LINEAR;
case GLTexParamConst::NEAREST:
case GLTexParamConst::NEAREST_MIPMAP_NEAREST:
return backend::SamplerFilter::NEAREST;
default:
AXASSERT(false, "invalid GL sampler filter!");
return backend::SamplerFilter::LINEAR;
}
}
backend::SamplerAddressMode toBackendAddressMode(int mode)
{
switch (mode)
{
case GLTexParamConst::REPEAT:
return backend::SamplerAddressMode::REPEAT;
case GLTexParamConst::CLAMP:
case GLTexParamConst::CLAMP_TO_EDGE:
return backend::SamplerAddressMode::CLAMP_TO_EDGE;
case GLTexParamConst::MIRROR_REPEAT:
return backend::SamplerAddressMode::MIRROR_REPEAT;
default:
AXASSERT(false, "invalid GL address mode");
return backend::SamplerAddressMode::REPEAT;
}
}
const Mat4& getAdjustMatrix()
{
static ax::Mat4 adjustMatrix = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0.5, 0.5, 0, 0, 0, 1};
return adjustMatrix;
}
std::vector<float> getNormalMat3OfMat4(const Mat4& mat)
{
std::vector<float> normalMat(9);
Mat4 mvInverse = mat;
mvInverse.m[12] = mvInverse.m[13] = mvInverse.m[14] = 0.0f;
mvInverse.inverse();
mvInverse.transpose();
normalMat[0] = mvInverse.m[0];
normalMat[1] = mvInverse.m[1];
normalMat[2] = mvInverse.m[2];
normalMat[3] = mvInverse.m[4];
normalMat[4] = mvInverse.m[5];
normalMat[5] = mvInverse.m[6];
normalMat[6] = mvInverse.m[8];
normalMat[7] = mvInverse.m[9];
normalMat[8] = mvInverse.m[10];
return normalMat;
}
std::vector<int> parseIntegerList(std::string_view intsString)
{
std::vector<int> result;
if (!intsString.empty())
{
const char* cStr = intsString.data();
char* endptr;
for (auto i = strtol(cStr, &endptr, 10); endptr != cStr; i = strtol(cStr, &endptr, 10))
{
if (errno == ERANGE)
{
errno = 0;
AXLOGWARN("%s contains out of range integers", intsString.data());
}
result.emplace_back(static_cast<int>(i));
cStr = endptr;
}
}
return result;
}
std::string bin2hex(std::string_view binary /*charstring also regard as binary in C/C++*/, int delim, bool prefix)
{
char low;
char high;
size_t len = binary.length();
bool delim_needed = delim != -1 || delim == ' ';
std::string result;
result.reserve((len << 1) + (delim_needed ? len : 0) + (prefix ? (len << 1) : 0));
for (size_t i = 0; i < len; ++i)
{
auto ch = binary[i];
high = (ch >> 4) & 0x0f;
low = ch & 0x0f;
if (prefix)
{
result.push_back('0');
result.push_back('x');
}
auto hic = nibble2hex(high);
auto lic = nibble2hex(low);
result.push_back(hic);
result.push_back(lic);
if (delim_needed)
{
result.push_back(delim);
}
}
return result;
}
void killCurrentProcess()
{
#if !defined(_WIN32)
::kill(::getpid(), SIGKILL);
#else
::TerminateProcess(::GetCurrentProcess(), SIGTERM);
#endif
}
std::string urlEncode(std::string_view s)
{
std::string encoded;
if (!s.empty())
{
encoded.reserve(s.length() * 3 / 2);
for (const char c : s)
{
if (isalnum((uint8_t)c) || c == '-' || c == '_' || c == '.' || c == '~')
{
encoded.push_back(c);
}
else
{
encoded.push_back('%');
char hex[2];
encoded.append(char2hex(hex, c, 'A'), sizeof(hex));
}
}
}
return encoded;
}
std::string urlDecode(std::string_view st)
{
std::string decoded;
if (!st.empty())
{
const char* s = st.data();
const size_t length = st.length();
decoded.reserve(length * 2 / 3);
for (unsigned int i = 0; i < length; ++i)
{
if (!s[i])
break;
if (s[i] == '%')
{
decoded.push_back(hex2char(s + i + 1));
i = i + 2;
}
else if (s[i] == '+')
{
decoded.push_back(' ');
}
else
{
decoded.push_back(s[i]);
}
}
}
return decoded;
}
AX_DLL std::string base64Encode(std::string_view s)
{
size_t n = ax::base64::encoded_size(s.length());
if (n > 0)
{
std::string ret;
/**
* @brief resize_and_overrite avaialbe on vs2022 17.1
* refer to:
* - https://learn.microsoft.com/en-us/cpp/overview/visual-cpp-language-conformance?view=msvc-170
* - https://github.com/microsoft/STL/wiki/Changelog#vs-2022-171
* - https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-170
*
*/
#if defined(_HAS_CXX23) && _HAS_CXX23 && (_MSC_VER >= 1931)
ret.resize_and_overwrite(n, [&](char* p, size_t) { return ax::base64::encode(p, s.data(), s.length()); });
#else
ret.resize(n);
ret.resize(ax::base64::encode(&ret.front(), s.data(), s.length()));
#endif
return ret;
}
return std::string{};
}
AX_DLL std::string base64Decode(std::string_view s)
{
size_t n = ax::base64::decoded_size(s.length());
if (n > 0)
{
std::string ret;
#if defined(_HAS_CXX23) && _HAS_CXX23 && (_MSC_VER >= 1931)
ret.resize_and_overwrite(n, [&](char* p, size_t) { return ax::base64::decode(p, s.data(), s.length()); });
#else
ret.resize(n);
ret.resize(ax::base64::decode(&ret.front(), s.data(), s.length()));
#endif
return ret;
}
return std::string{};
}
int base64Encode(const unsigned char* in, unsigned int inLength, char** out)
{
auto n = ax::base64::encoded_size(inLength);
// should be enough to store 8-bit buffers in 6-bit buffers
char* tmp = nullptr;
if (n > 0 && (tmp = (char*)malloc(n + 1)))
{
auto ret = ax::base64::encode(tmp, in, inLength);
tmp[ret] = '\0';
*out = tmp;
return ret;
}
*out = nullptr;
return 0;
}
AX_DLL int base64Decode(const unsigned char* in, unsigned int inLength, unsigned char** out)
{
size_t n = ax::base64::decoded_size(inLength);
unsigned char* tmp = nullptr;
if (n > 0 && (tmp = (unsigned char*)malloc(n)))
{
n = static_cast<int>(ax::base64::decode(tmp, reinterpret_cast<const char*>(in), inLength));
if (n > 0)
*out = tmp;
else
{
*out = nullptr;
free(tmp);
}
return n;
}
*out = nullptr;
return 0;
}
AX_DLL uint32_t fourccValue(std::string_view str)
{
if (str.empty() || str[0] != '#')
return (uint32_t)-1;
uint32_t value = 0;
memcpy(&value, str.data() + 1, std::min(sizeof(value), str.size() - 1));
return value;
}
} // namespace utils
NS_AX_END
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