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#include "../include/Platform.hpp"
#include <cassert>
#include <algorithm>
namespace sibs
{
static std::unordered_map<Platform, const char*> platformNames;
static bool platformNamesSet = false;
static int countSetBits(u64 value)
{
int count = 0;
while(value)
{
count += (value & 1ULL);
value >>= 1ULL;
}
return count;
}
// Returns -1 if no bit is set
static u64 getLeastSignificantBitSetPosition(u64 value)
{
for(u64 i = 0; i < sizeof(u64); ++i)
{
if(value & 1ULL)
return i;
value >>= 1ULL;
}
return -1ULL;
}
bool containsPlatform(const std::vector<Platform> &platforms, Platform platform)
{
for (Platform vecPlatform : platforms)
{
if(platform & vecPlatform)
return true;
}
return false;
}
const char* asString(Platform platform)
{
if(!platformNamesSet)
{
platformNamesSet = true;
for(auto &it : PLATFORM_BY_NAME)
{
platformNames[it.second] = it.first.data;
}
}
auto it = platformNames.find(platform);
if(it != platformNames.end())
return it->second;
return nullptr;
}
Platform getPlatformByName(StringView name)
{
auto it = PLATFORM_BY_NAME.find(name);
if(it != PLATFORM_BY_NAME.end())
return it->second;
return PLATFORM_INVALID;
}
static std::string join(const std::vector<std::string> &strings)
{
std::string result;
ssize size = strings.size();
ssize i = 0;
for(const std::string &str: strings)
{
result += str;
if(i == size - 2)
result += " and ";
else if(i < size - 2)
result += ", ";
++i;
}
return result;
}
std::string getPlatformListFormatted()
{
std::vector<std::string> platformsSorted;
for(auto &it: PLATFORM_BY_NAME)
{
platformsSorted.push_back({ it.first.data, it.first.size });
}
std::sort(platformsSorted.begin(), platformsSorted.end());
return join(platformsSorted);
}
bool isSamePlatformFamily(Platform a, Platform b)
{
return a & b;
}
bool isBaseForPlatform(Platform base, Platform platform)
{
return base == PLATFORM_ANY || base == platform || (isSamePlatformFamily(platform, base) && countSetBits(base) < countSetBits(platform));
}
Platform getPlatformGenericType(Platform platform)
{
if(platform == PLATFORM_INVALID || platform == PLATFORM_ANY)
return PLATFORM_INVALID;
return (Platform)(1ULL << (u64)getLeastSignificantBitSetPosition(platform));
}
}
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