axmol/core/base/CCNS.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2017 Chukong Technologies
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

https://adxeproject.github.io/

Permission is hereby granted, free of charge, to any person obtaining a copy
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all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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****************************************************************************/
#include "base/CCNS.h"
#include <string>
#include <vector>
#include <string.h>
#include <stdlib.h>

#include "base/ccUtils.h"

using namespace std;

NS_CC_BEGIN

typedef std::vector<std::string> strArray;

// string toolkit
static inline void split(std::string_view src, std::string_view token, strArray& vect)
{
    size_t nend      = 0;
    size_t nbegin    = 0;
    size_t tokenSize = token.size();
    while (nend != std::string::npos)
    {
        nend = src.find(token, nbegin);
        if (nend == std::string::npos)
            vect.push_back(std::string{src.substr(nbegin, src.length() - nbegin)});
        else
            vect.push_back(std::string{src.substr(nbegin, nend - nbegin)});
        nbegin = nend + tokenSize;
    }
}

// first, judge whether the form of the string like this: {x,y}
// if the form is right,the string will be split into the parameter strs;
// or the parameter strs will be empty.
// if the form is right return true,else return false.
static bool splitWithForm(std::string_view content, strArray& strs)
{
    bool bRet = false;

    do
    {
        CC_BREAK_IF(content.empty());

        size_t nPosLeft  = content.find('{');
        size_t nPosRight = content.find('}');

        // don't have '{' and '}'
        CC_BREAK_IF(nPosLeft == std::string::npos || nPosRight == std::string::npos);
        // '}' is before '{'
        CC_BREAK_IF(nPosLeft > nPosRight);

        auto pointStr = content.substr(nPosLeft + 1, nPosRight - nPosLeft - 1);
        // nothing between '{' and '}'
        CC_BREAK_IF(pointStr.empty());

        size_t nPos1 = pointStr.find('{');
        size_t nPos2 = pointStr.find('}');
        // contain '{' or '}'
        CC_BREAK_IF(nPos1 != std::string::npos || nPos2 != std::string::npos);

        split(pointStr, ",", strs);
        if (strs.size() != 2 || strs[0].empty() || strs[1].empty())
        {
            strs.clear();
            break;
        }

        bRet = true;
    } while (0);

    return bRet;
}

// implement the functions

Rect RectFromString(std::string_view str)
{
    Rect result = Rect::ZERO;

    do
    {
        CC_BREAK_IF(str.empty());
        auto content = str;

        // find the first '{' and the third '}'
        size_t nPosLeft  = content.find('{');
        size_t nPosRight = content.find('}');
        for (int i = 1; i < 3; ++i)
        {
            if (nPosRight == std::string::npos)
            {
                break;
            }
            nPosRight = content.find('}', nPosRight + 1);
        }
        CC_BREAK_IF(nPosLeft == std::string::npos || nPosRight == std::string::npos);

        content          = content.substr(nPosLeft + 1, nPosRight - nPosLeft - 1);
        size_t nPointEnd = content.find('}');
        CC_BREAK_IF(nPointEnd == std::string::npos);
        nPointEnd = content.find(',', nPointEnd);
        CC_BREAK_IF(nPointEnd == std::string::npos);

        // get the point string and size string
        auto pointStr = content.substr(0, nPointEnd);
        auto sizeStr  = content.substr(nPointEnd + 1, content.length() - nPointEnd);

        // split the string with ','
        strArray pointInfo;
        CC_BREAK_IF(!splitWithForm(pointStr, pointInfo));
        strArray sizeInfo;
        CC_BREAK_IF(!splitWithForm(sizeStr, sizeInfo));

        float x      = (float)utils::atof(pointInfo[0].c_str());
        float y      = (float)utils::atof(pointInfo[1].c_str());
        float width  = (float)utils::atof(sizeInfo[0].c_str());
        float height = (float)utils::atof(sizeInfo[1].c_str());

        result = Rect(x, y, width, height);
    } while (0);

    return result;
}

Vec2 PointFromString(std::string_view str)
{
    Vec2 ret;

    do
    {
        strArray strs;
        CC_BREAK_IF(!splitWithForm(str, strs));

        float x = (float)utils::atof(strs[0].c_str());
        float y = (float)utils::atof(strs[1].c_str());

        ret.set(x, y);
    } while (0);

    return ret;
}

Vec2 SizeFromString(std::string_view pszContent)
{
    Vec2 ret = Vec2::ZERO;

    do
    {
        strArray strs;
        CC_BREAK_IF(!splitWithForm(pszContent, strs));

        float width  = (float)utils::atof(strs[0].c_str());
        float height = (float)utils::atof(strs[1].c_str());

        ret = Vec2(width, height);
    } while (0);

    return ret;
}

NS_CC_END