ImmutableStringBuilder.cpp

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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