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// Copyright Epic Games, Inc. All Rights Reserved.
#include <doctest/doctest.h>
#include <stdarg.h>
#include <zencore/memory.h>
#include <zencore/stream.h>
#include <algorithm>
#include <stdexcept>
namespace zen {
MemoryInStream::MemoryInStream(const void* buffer, size_t size)
: m_Buffer(reinterpret_cast<const uint8_t*>(buffer), reinterpret_cast<const uint8_t*>(buffer) + size)
{
}
void
MemoryInStream::Read(void* buffer, size_t byteCount, uint64_t offset)
{
RwLock::ExclusiveLockScope _(m_Lock);
const size_t needEnd = offset + byteCount;
if (needEnd > m_Buffer.size())
throw std::runtime_error("read past end of file!"); // TODO: better exception
memcpy(buffer, m_Buffer.data() + offset, byteCount);
}
void
MemoryOutStream::Write(const void* data, size_t byteCount, uint64_t offset)
{
RwLock::ExclusiveLockScope _(m_Lock);
const size_t needEnd = offset + byteCount;
if (needEnd > m_Buffer.size())
m_Buffer.resize(needEnd);
memcpy(m_Buffer.data() + offset, data, byteCount);
}
void
MemoryOutStream::Flush()
{
// No-op
}
//////////////////////////////////////////////////////////////////////////
TextWriter::TextWriter(OutStream& stream) : m_Stream(&stream)
{
}
TextWriter::~TextWriter() = default;
void
TextWriter::Write(const void* data, size_t byteCount)
{
m_Stream->Write(data, byteCount, m_CurrentOffset);
m_CurrentOffset += byteCount;
}
TextWriter&
operator<<(TextWriter& Writer, const char* value)
{
if (value)
Writer.Write(value, strlen(value));
else
Writer.Write("(null)", 6);
return Writer;
}
TextWriter&
operator<<(TextWriter& writer, const std::string_view& value)
{
writer.Write(value.data(), value.size());
return writer;
}
TextWriter&
operator<<(TextWriter& writer, bool value)
{
if (value)
writer.Write("true", 4);
else
writer.Write("false", 5);
return writer;
}
TextWriter&
operator<<(TextWriter& writer, int8_t value)
{
char buffer[16];
#if ZEN_PLATFORM_WINDOWS
_itoa_s(value, buffer, 10);
#else
sprintf(buffer, "%d", value);
#endif
writer << buffer;
return writer;
}
TextWriter&
operator<<(TextWriter& writer, int16_t value)
{
char buffer[16];
#if ZEN_PLATFORM_WINDOWS
_itoa_s(value, buffer, 10);
#else
sprintf(buffer, "%d", value);
#endif
writer << buffer;
return writer;
}
TextWriter&
operator<<(TextWriter& writer, int32_t value)
{
char buffer[16];
#if ZEN_PLATFORM_WINDOWS
_itoa_s(value, buffer, 10);
#else
sprintf(buffer, "%d", value);
#endif
writer << buffer;
return writer;
}
TextWriter&
operator<<(TextWriter& writer, int64_t value)
{
char buffer[32];
#if ZEN_PLATFORM_WINDOWS
_i64toa_s(value, buffer, sizeof buffer, 10);
#else
sprintf(buffer, "%" PRId64, value);
#endif
writer << buffer;
return writer;
}
TextWriter&
operator<<(TextWriter& writer, uint8_t value)
{
char buffer[16];
#if ZEN_PLATFORM_WINDOWS
_ultoa_s(value, buffer, 10);
#else
sprintf(buffer, "%u", value);
#endif
writer << buffer;
return writer;
}
TextWriter&
operator<<(TextWriter& writer, uint16_t value)
{
char buffer[16];
#if ZEN_PLATFORM_WINDOWS
_ultoa_s(value, buffer, 10);
#else
sprintf(buffer, "%u", value);
#endif
writer << buffer;
return writer;
}
TextWriter&
operator<<(TextWriter& writer, uint32_t value)
{
char buffer[16];
#if ZEN_PLATFORM_WINDOWS
_ultoa_s(value, buffer, 10);
#else
sprintf(buffer, "%u", value);
#endif
writer << buffer;
return writer;
}
TextWriter&
operator<<(TextWriter& writer, uint64_t value)
{
char buffer[32];
#if ZEN_PLATFORM_WINDOWS
_ui64toa_s(value, buffer, sizeof buffer, 10);
#else
sprintf(buffer, "%" PRIu64, value);
#endif
writer << buffer;
return writer;
}
void
TextWriter::Writef(const char* formatString, ...)
{
va_list args;
va_start(args, formatString);
char* tempBuffer = nullptr;
char buffer[4096];
int rv = vsnprintf(buffer, sizeof buffer, formatString, args);
ZEN_ASSERT(rv >= 0);
if (uint32_t(rv) > sizeof buffer)
{
// Need more room -- allocate temporary buffer
tempBuffer = (char*)Memory::Alloc(rv + 1, 8);
int rv2 = vsnprintf(tempBuffer, rv + 1, formatString, args);
ZEN_ASSERT(rv >= 0);
ZEN_ASSERT(rv2 <= rv);
rv = rv2;
}
m_Stream->Write(tempBuffer ? tempBuffer : buffer, rv, m_CurrentOffset);
m_CurrentOffset += rv;
if (tempBuffer)
Memory::Free(tempBuffer);
va_end(args);
}
//////////////////////////////////////////////////////////////////////////
IndentTextWriter::IndentTextWriter(OutStream& stream) : TextWriter(stream)
{
}
IndentTextWriter::~IndentTextWriter()
{
}
void
IndentTextWriter::Write(const void* data, size_t byteCount)
{
const uint8_t* src = reinterpret_cast<const uint8_t*>(data);
int cur = m_LineCursor;
while (byteCount)
{
char c = *src++;
if (cur == 0)
{
const char indentSpaces[] =
" "
" ";
cur = std::min<int>(m_IndentAmount, sizeof indentSpaces - 1);
memcpy(m_LineBuffer, indentSpaces, cur);
}
m_LineBuffer[cur++] = c;
--byteCount;
if (c == '\n' || cur == sizeof m_LineBuffer)
{
TextWriter::Write(m_LineBuffer, cur);
cur = 0;
}
}
m_LineCursor = cur;
}
//////////////////////////////////////////////////////////////////////////
//
// Testing related code follows...
//
void
stream_forcelink()
{
}
TEST_CASE("BinaryWriter and BinaryWriter")
{
MemoryOutStream stream;
BinaryWriter writer(stream);
CHECK(writer.CurrentOffset() == 0);
writer.Write("foo!", 4);
CHECK(writer.CurrentOffset() == 4);
writer << uint8_t(42) << uint16_t(42) << uint32_t(42) << uint64_t(42);
writer << int8_t(42) << int16_t(42) << int32_t(42) << int64_t(42);
CHECK(writer.CurrentOffset() == (4 + 15 * 2));
// Read the data back
MemoryInStream instream(stream.Data(), stream.Size());
BinaryReader reader(instream);
CHECK(reader.CurrentOffset() == 0);
char buffer[4];
reader.Read(buffer, 4);
CHECK(reader.CurrentOffset() == 4);
CHECK(memcmp(buffer, "foo!", 4) == 0);
uint8_t ui8 = 0;
uint16_t ui16 = 0;
uint32_t ui32 = 0;
uint64_t ui64 = 0;
int8_t i8 = 0;
int16_t i16 = 0;
int32_t i32 = 0;
int64_t i64 = 0;
reader >> ui8 >> ui16 >> ui32 >> ui64;
reader >> i8 >> i16 >> i32 >> i64;
CHECK(reader.CurrentOffset() == (4 + 15 * 2));
CHECK(ui8 == 42);
CHECK(ui16 == 42);
CHECK(ui32 == 42);
CHECK(ui64 == 42);
CHECK(i8 == 42);
CHECK(i16 == 42);
CHECK(i32 == 42);
CHECK(i64 == 42);
}
} // namespace zen
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