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//
// Copyright 2018 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// ImmutableStringBuilder.cpp: Stringstream-like utility for building pool allocated strings where
// the maximum length is known in advance.
//
#include "compiler/translator/ImmutableStringBuilder.h"
#include <stdio.h>
namespace sh
{
ImmutableStringBuilder &ImmutableStringBuilder::operator<<(const ImmutableString &str)
{
ASSERT(mData != nullptr);
ASSERT(mPos + str.length() <= mMaxLength);
memcpy(mData + mPos, str.data(), str.length());
mPos += str.length();
return *this;
}
ImmutableStringBuilder &ImmutableStringBuilder::operator<<(const char *str)
{
ASSERT(mData != nullptr);
size_t len = strlen(str);
ASSERT(mPos + len <= mMaxLength);
memcpy(mData + mPos, str, len);
mPos += len;
return *this;
}
ImmutableStringBuilder &ImmutableStringBuilder::operator<<(const char &c)
{
ASSERT(mData != nullptr);
ASSERT(mPos + 1 <= mMaxLength);
mData[mPos++] = c;
return *this;
}
void ImmutableStringBuilder::appendDecimal(const uint32_t &u)
{
int numChars = snprintf(mData + mPos, mMaxLength - mPos, "%d", u);
ASSERT(numChars >= 0);
ASSERT(mPos + numChars <= mMaxLength);
mPos += numChars;
}
ImmutableStringBuilder::operator ImmutableString()
{
mData[mPos] = '\0';
ImmutableString str(static_cast<const char *>(mData), mPos);
#if defined(ANGLE_ENABLE_ASSERTS)
// Make sure that nothing is added to the string after it is finalized.
mData = nullptr;
#endif
return str;
}
} // namespace sh
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