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fast integer types

This commit is contained in:
Kevin Matz 2023-05-15 10:48:59 -04:00
parent b64b185d73
commit e638b09be6
1 changed files with 15 additions and 9 deletions
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24
lib/bufferstream/bufferstream.h
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@ -44,7 +44,7 @@ public:
BigEndian, //!< Big Endian, Network Order
};
bufferstream(uint8_t * p, std::streamsize l, byteorder o = BigEndian);
bufferstream(uint8_t *p, std::streamsize l, byteorder o = BigEndian);
// input sequence
uint32_t available();
@ -98,7 +98,7 @@ public:
T readType()
{
T ret = 0;
int width = sizeof(T);
uint_fast8_t width = sizeof(T);
if (in_avail() < width)
setstate(std::ios_base::failbit);
if (!good())
@ -112,11 +112,11 @@ public:
auto bytes = reinterpret_cast<uint8_t*>(&ret);
switch (order_) {
case LittleEndian:
for (int i = 0; i < width; i++)
for (int_fast8_t i = 0; i < width; i++)
bytes[i] = get();
break;
case BigEndian:
for (int i = width; --i >= 0;)
for (int_fast8_t i = width; --i >= 0;)
bytes[i] = get();
break;
}
@ -132,18 +132,19 @@ public:
template<typename T>
void writeType (const T& val)
{
if (sizeof(T) == 1) {
uint_fast8_t width = sizeof(T);
if (width == 1) {
put(static_cast<uint8_t>(val));
return;
}
auto bytes = reinterpret_cast<const uint8_t*>(&val);
switch (order_) {
case LittleEndian:
for (int i = 0; i < sizeof(T); i++)
for (int_fast8_t i = 0; i < width; i++)
put(bytes[i]);
break;
case BigEndian:
for (int i = sizeof(T); --i >= 0;)
for (int_fast8_t i = width; --i >= 0;)
put(bytes[i]);
break;
}
@ -153,10 +154,15 @@ private:
byteorder order_;
};
using Buffer = std::shared_ptr<bufferstream>; //!< memory managed unsigned 8-bit buffer
/**
* @brief The inheritable base of data objects that can be read from and written to a bufferstream.
* Memory-managed unsigned 8-bit buffer
*/
using Buffer = std::shared_ptr<bufferstream>;
/**
* @brief The base for data objects that can be read from and written to a bufferstream.
*/
struct streamable
{