project64/Source/Common/IniFile.cpp

#include "IniFile.h"
#include "StdString.h"
#include <stdlib.h>
#include <stdarg.h>

CIniFileBase::CIniFileBase(CFileBase & FileObject, const char * FileName) :
    m_lastSectionSearch(0),
    m_CurrentSectionFilePos(0),
    m_LineFeed("\r\n"),
    m_ReadOnly(true),
    m_InstantFlush(true),
    m_File(FileObject),
    m_FileName(FileName),
    m_CurrentSectionDirty(false),
    m_SortFunction(nullptr)
{
}

CIniFileBase::~CIniFileBase(void)
{
    SaveCurrentSection();
}

void CIniFileBase::fInsertSpaces(int Pos, int NoOfSpaces)
{
    enum { fIS_MvSize = 0x2000 };

    unsigned char Data[fIS_MvSize + 1];
    int SizeToRead, result;
    long end, WritePos;

    m_File.Seek(0, CFileBase::end);
    end = (long)m_File.GetPosition();

    if (NoOfSpaces > 0)
    {
        std::string SpaceBuffer = FormatStr("%*c", NoOfSpaces, ' ');

        do
        {
            SizeToRead = end - Pos;
            if (SizeToRead > fIS_MvSize) { SizeToRead = fIS_MvSize; }
            if (SizeToRead > 0)
            {
                m_File.Seek(SizeToRead * -1, CFileBase::current);
                WritePos = (long)m_File.GetPosition();
                memset(Data, 0, sizeof(Data));
                result = m_File.Read(Data, SizeToRead);
                m_File.Seek(WritePos, CFileBase::begin);
                end = WritePos;

                m_File.Write(SpaceBuffer.c_str(), (uint32_t)SpaceBuffer.length());
                m_File.Write(Data, result);
                m_File.Seek(WritePos, CFileBase::begin);
            }
        } while (SizeToRead > 0);
    }
    if (NoOfSpaces < 0)
    {
        int ReadPos = Pos + (NoOfSpaces * -1);
        WritePos = Pos;

        do
        {
            SizeToRead = end - ReadPos;
            if (SizeToRead > fIS_MvSize) { SizeToRead = fIS_MvSize; }
            m_File.Seek(ReadPos, CFileBase::begin);
            m_File.Read(Data, SizeToRead);
            m_File.Seek(WritePos, CFileBase::begin);
            m_File.Write(Data, SizeToRead);
            ReadPos += SizeToRead;
            WritePos += SizeToRead;
        } while (SizeToRead > 0);

        m_File.Seek(WritePos, CFileBase::begin);
        std::string SpaceBuffer = FormatStr("%*c", (NoOfSpaces * -1), ' ');
        m_File.Write(SpaceBuffer.c_str(), (uint32_t)SpaceBuffer.length());

        m_File.Seek(WritePos, CFileBase::begin);
        m_File.SetEndOfFile();
        m_File.Seek(0, CFileBase::begin);
    }
}

int CIniFileBase::GetStringFromFile(char * & String, std::unique_ptr<char> &Data, int & MaxDataSize, int & DataSize, int & ReadPos)
{
    enum { BufferIncrease = 0x2000 };
    if (MaxDataSize == 0)
    {
        ReadPos = 0;
        MaxDataSize = BufferIncrease;
        Data.reset(new char[MaxDataSize]);
        DataSize = m_File.Read(&Data.get()[DataSize], MaxDataSize);
    }

    for (;;)
    {
        int count;

        for (count = ReadPos; count < DataSize; count++)
        {
            if (Data.get()[count] == '\n')
            {
                int len = (count - ReadPos) + 1;
                String = &Data.get()[ReadPos];
                String[len - 1] = 0;
                ReadPos = count + 1;
                return len;
            }
        }

        if (ReadPos != 0)
        {
            if ((DataSize - ReadPos) > 0)
            {
                memmove(Data.get(), &Data.get()[ReadPos], DataSize - ReadPos);
            }
            DataSize -= ReadPos;
            ReadPos = 0;
        }
        else
        {
            // Increase buffer size
            int NewMaxDataSize = MaxDataSize + BufferIncrease;
            char * NewBuffer = new char[NewMaxDataSize];
            if (NewBuffer == nullptr)
            {
                return -1;
            }
            memcpy(NewBuffer, Data.get(), DataSize);
            MaxDataSize = NewMaxDataSize;
            Data.reset(NewBuffer);
        }

        int dwRead = m_File.Read(&Data.get()[DataSize], MaxDataSize - DataSize);
        if (dwRead == 0)
        {
            if (DataSize > 0)
            {
                int len = DataSize + 1;
                String = &Data.get()[ReadPos];
                String[len - 1] = 0;
                DataSize = 0;
                ReadPos = 0;
                return len;
            }
            return -1;
        }
        DataSize += dwRead;
    }
}

void CIniFileBase::SaveCurrentSection(void)
{
    if (!m_CurrentSectionDirty || m_ReadOnly)
    {
        return;
    }
    m_CurrentSectionDirty = false;
    if (m_CurrentSection.length() == 0)
    {
        m_CurrentSection = "default";
    }

    int lineFeedLen = (int)strlen(m_LineFeed);

    if (m_CurrentSectionFilePos == -1)
    {
        // Section has not been added yet
        m_File.Seek(0, CFileBase::end);

        int len = (int)m_CurrentSection.length() + (lineFeedLen * 2) + 5;
        std::unique_ptr<char> SectionName(new char[len]);
        if (m_File.GetLength() < (int)strlen(m_LineFeed))
        {
            sprintf(SectionName.get(), "[%s]%s", m_CurrentSection.c_str(), m_LineFeed);
        }
        else
        {
            sprintf(SectionName.get(), "%s[%s]%s", m_LineFeed, m_CurrentSection.c_str(), m_LineFeed);
        }
        m_File.Write(SectionName.get(), (int)strlen(SectionName.get()));
        m_CurrentSectionFilePos = (long)m_File.GetPosition();
        m_SectionsPos.insert(FILELOC::value_type(m_CurrentSection, m_CurrentSectionFilePos));
    }
    else
    {
        // Increase/decrease space needed
        int NeededBufferLen = 0;
        {
            std::unique_ptr<char> LineData;
            int len = 0;

            for (KeyValueList::iterator iter = m_CurrentSectionData.begin(); iter != m_CurrentSectionData.end(); iter++)
            {
                int newLen = (int)iter->first.length() + (int)iter->second.length() + lineFeedLen + 5;
                if (newLen > len)
                {
                    LineData.reset(new char[newLen]);
                    len = newLen;
                }
                sprintf(LineData.get(), "%s=%s%s", iter->first.c_str(), iter->second.c_str(), m_LineFeed);
                NeededBufferLen += (int)strlen(LineData.get());
            }
        }
        int currentLen = 0;

        m_File.Seek(m_CurrentSectionFilePos, CFileBase::begin);

        int MaxDataSize = 0, DataSize = 0, ReadPos = 0, result;
        std::unique_ptr<char> Data;
        char *Input = nullptr;

        // Skip first line as it is the section name
        int StartPos = m_CurrentSectionFilePos;
        int EndPos = StartPos;
        do
        {
            result = GetStringFromFile(Input, Data, MaxDataSize, DataSize, ReadPos);
            if (result <= 1) { continue; }
            if (strlen(CleanLine(Input)) <= 1 || Input[0] != '[')
            {
                EndPos = (long)((m_File.GetPosition() - DataSize) + ReadPos);

                continue;
            }
            if (Input[0] == '[')
            {
                NeededBufferLen += lineFeedLen;
            }
            break;
        } while (result >= 0);
        currentLen = EndPos - StartPos;

        if (NeededBufferLen != currentLen)
        {
            fInsertSpaces(StartPos, NeededBufferLen - currentLen);
            m_File.Flush();
            ClearSectionPosList(StartPos);
        }
        // Set pointer to beginning of the start POS
        m_File.Seek(StartPos, CFileBase::begin);
    }

    {
        std::unique_ptr<char> LineData;
        int len = 0;

        if (m_SortFunction != nullptr)
        {
            KeyValueVector data;
            for (KeyValueList::iterator iter = m_CurrentSectionData.begin(); iter != m_CurrentSectionData.end(); iter++)
            {
                data.push_back(KeyValueItem(&iter->first, &iter->second));
            }
            m_SortFunction(data);
            for (size_t i = 0, n = data.size(); i < n; i++)
            {
                KeyValueItem & item = data[i];
                int newLen = (int)(item.first->length()) + (int)item.second->length() + lineFeedLen + 5;
                if (newLen > len)
                {
                    LineData.reset(new char[newLen]);
                    len = newLen;
                }
                sprintf(LineData.get(), "%s=%s%s", item.first->c_str(), item.second->c_str(), m_LineFeed);
                m_File.Write(LineData.get(), (int)strlen(LineData.get()));
            }
        }
        else
        {
            for (KeyValueList::iterator iter = m_CurrentSectionData.begin(); iter != m_CurrentSectionData.end(); iter++)
            {
                int newLen = (int)iter->first.length() + (int)iter->second.length() + lineFeedLen + 5;
                if (newLen > len)
                {
                    LineData.reset(new char[newLen]);
                    len = newLen;
                }
                sprintf(LineData.get(), "%s=%s%s", iter->first.c_str(), iter->second.c_str(), m_LineFeed);
                m_File.Write(LineData.get(), (int)strlen(LineData.get()));
            }
        }
    }
    m_File.Flush();
}

bool CIniFileBase::MoveToSectionNameData(const char * lpSectionName, bool ChangeCurrentSection)
{
    if (strcmp(lpSectionName, m_CurrentSection.c_str()) == 0)
    {
        return true;
    }
    if (ChangeCurrentSection)
    {
        SaveCurrentSection();
        m_CurrentSection = "";
    }

    std::unique_ptr<char> Data;
    char *Input = nullptr;
    int MaxDataSize = 0, DataSize = 0, ReadPos = 0, result;

    FILELOC_ITR iter = m_SectionsPos.find(std::string(lpSectionName));
    bool bFoundSection = false;
    if (iter != m_SectionsPos.end())
    {
        if (ChangeCurrentSection)
        {
            m_CurrentSection = iter->first;
            m_CurrentSectionFilePos = iter->second;
        }
        m_File.Seek(iter->second, CFileBase::begin);
        bFoundSection = true;
    }
    else
    {
        m_File.Seek(m_lastSectionSearch, CFileBase::begin);

        //long Fpos;
        uint8_t pUTF8[3];
        pUTF8[0] = 0xef;
        pUTF8[1] = 0xbb;
        pUTF8[2] = 0xbf;

        do
        {
            result = GetStringFromFile(Input, Data, MaxDataSize, DataSize, ReadPos);
            if (result <= 1) { continue; }
            if (strlen(CleanLine(Input)) <= 1) { continue; }

            // We only care about sections
            char * CurrentSection = Input;

            if (m_lastSectionSearch == 0 && !memcmp(CurrentSection, pUTF8, 3))
            {
                CurrentSection += 3;
            }

            if (CurrentSection[0] != '[') { continue; }
            int lineEndPos = (int)strlen(CurrentSection) - 1;
            if (CurrentSection[lineEndPos] != ']') { continue; }
            // Take off the ']' from the end of the string
            CurrentSection[lineEndPos] = 0;
            CurrentSection += 1;
            m_lastSectionSearch = (long)((m_File.GetPosition() - DataSize) + ReadPos);
            m_SectionsPos.insert(FILELOC::value_type(CurrentSection, m_lastSectionSearch));

            if (_stricmp(lpSectionName, CurrentSection) != 0)
            {
                continue;
            }

            if (ChangeCurrentSection)
            {
                m_CurrentSection = lpSectionName;
                m_CurrentSectionFilePos = m_lastSectionSearch;
            }
            else
            {
                m_File.Seek(m_lastSectionSearch, CFileBase::begin);
            }
            bFoundSection = true;
            break;
        } while (result >= 0);
    }

    if (!bFoundSection && strcmp(lpSectionName, "default") == 0)
    {
        m_SectionsPos.insert(FILELOC::value_type(lpSectionName, 0));
        if (ChangeCurrentSection)
        {
            m_CurrentSection = lpSectionName;
            m_CurrentSectionFilePos = 0;
        }
        m_File.Seek(m_lastSectionSearch, CFileBase::begin);
        bFoundSection = true;
    }

    if (bFoundSection && ChangeCurrentSection)
    {
        m_CurrentSectionData.clear();
        do
        {
            result = GetStringFromFile(Input, Data, MaxDataSize, DataSize, ReadPos);
            if (result <= 1) { continue; }
            if (strlen(CleanLine(Input)) <= 1) { continue; }
            if (Input[0] == '[') { break; }
            char * Pos = strchr(Input, '=');
            if (Pos == nullptr) { continue; }
            char * Value = &Pos[1];

            char * Pos1 = Pos - 1;
            while (((*Pos1 == ' ') || (*Pos1 == '\t')) && (Pos1 > Input))
            {
                Pos1--;
            }
            Pos1[1] = 0;

            m_CurrentSectionData.insert(KeyValueList::value_type(Input, Value));
        } while (result >= 0);
    }

    return bFoundSection;
}

const char * CIniFileBase::CleanLine(char * Line)
{
    char * Pos = Line;

    // Remove any comment from the line
    while (Pos != nullptr)
    {
        Pos = strchr(Pos, '/');
        if (Pos != nullptr)
        {
            if (Pos[1] == '/')
            {
                if (Pos > Line)
                {
                    char * Pos_1 = Pos - 1;

                    if (Pos_1[0] != ':')
                    {
                        Pos[0] = 0;
                    }
                    else
                        Pos += 1;
                }
                else
                {
                    Pos[0] = 0;
                }
            }
            else
            {
                Pos += 1;
            }
        }
    }

    // Strip any spaces or line feeds from the end of the line
    for (int count = (int)strlen(&Line[0]) - 1; count >= 0; count--)
    {
        if (Line[count] != ' ' && Line[count] != '\r') { break; }
        Line[count] = 0;
    }
    return Line;
}

void CIniFileBase::OpenIniFileReadOnly()
{
    if (m_File.Open(m_FileName.c_str(), CFileBase::modeRead))
    {
        m_ReadOnly = true;
        m_File.Seek(0, CFileBase::begin);
    }
}

void CIniFileBase::OpenIniFile(bool bCreate)
{
    // Open for reading/writing
    m_ReadOnly = false;
    if (!m_File.Open(m_FileName.c_str(), CFileBase::modeReadWrite | CFileBase::shareDenyWrite))
    {
        if (!m_File.Open(m_FileName.c_str(), CFileBase::modeRead))
        {
            if (bCreate)
            {
                if (!m_File.Open(m_FileName.c_str(), CFileBase::modeReadWrite | CFileBase::modeCreate | CFileBase::shareDenyWrite))
                {
                    return;
                }
            }
        }
        else
        {
            m_ReadOnly = true;
        }
    }
    m_File.Seek(0, CFileBase::begin);
}

bool CIniFileBase::IsEmpty()
{
    if (m_File.GetLength() == 0)
        return true;
    return false;
}

bool CIniFileBase::IsFileOpen(void)
{
    return m_File.IsOpen();
}

bool CIniFileBase::IsReadOnly(void)
{
    return m_ReadOnly;
}

bool CIniFileBase::DeleteSection(const char * lpSectionName)
{
    CGuard Guard(m_CS);

    if (!m_File.IsOpen()) { return false; }

    SaveCurrentSection();
    if (!MoveToSectionNameData(lpSectionName, true))
    {
        return false;
    }
    m_File.Seek(m_CurrentSectionFilePos, CFileBase::begin);
    long DeleteSectionStart = (long)(m_CurrentSectionFilePos - (strlen(lpSectionName) + strlen(m_LineFeed) + 2));
    long NextSectionStart = -1;

    {
        int MaxDataSize = 0, DataSize = 0, ReadPos = 0, NextLine = 0, result;
        std::unique_ptr <char> Data;
        char *Input = nullptr;
        do
        {
            result = GetStringFromFile(Input, Data, MaxDataSize, DataSize, ReadPos);
            if (result <= 1) { continue; }
            if (strlen(CleanLine(Input)) <= 1) { continue; }

            if (Input[0] != '[')
            {
                NextLine = (int)((m_File.GetPosition() - DataSize) + ReadPos);
                continue;
            }
            NextSectionStart = NextLine != 0 ? NextLine : (long)((m_File.GetPosition() - DataSize) + ReadPos);
            break;
        } while (result >= 0);
    }

    if (NextSectionStart != -1)
    {
        m_File.Seek(0, CFileBase::end);
        long end = (long)m_File.GetPosition();
        long ReadPos = NextSectionStart;
        long WritePos = DeleteSectionStart;

        enum { fIS_MvSize = 0x2000 };
        unsigned char Data[fIS_MvSize + 1];
        int SizeToRead;
        do
        {
            SizeToRead = end - ReadPos;
            if (SizeToRead > fIS_MvSize) { SizeToRead = fIS_MvSize; }
            m_File.Seek(ReadPos, CFileBase::begin);
            m_File.Read(Data, SizeToRead);
            m_File.Seek(WritePos, CFileBase::begin);
            m_File.Write(Data, SizeToRead);
            ReadPos += SizeToRead;
            WritePos += SizeToRead;
        } while (SizeToRead > 0);
        m_File.Seek(DeleteSectionStart + (end - NextSectionStart), CFileBase::begin);
        m_File.Flush();
        m_File.SetEndOfFile();
    }
    else
    {
        m_File.Seek(DeleteSectionStart, CFileBase::begin);
        m_File.Flush();
        m_File.SetEndOfFile();
    }
    m_File.Flush();
    ClearSectionPosList(0);
    m_CurrentSection = "";
    m_CurrentSectionData.clear();
    m_CurrentSectionFilePos = -1;
    return true;
}

bool CIniFileBase::GetString(const char * lpSectionName, const char * lpKeyName, const char * lpDefault, std::string & Value)
{
    CGuard Guard(m_CS);

    if (lpSectionName == nullptr || strlen(lpSectionName) == 0)
    {
        lpSectionName = "default";
    }

    if (m_File.IsOpen() && MoveToSectionNameData(lpSectionName, true))
    {
        KeyValueList::iterator iter = m_CurrentSectionData.find(lpKeyName);
        if (iter != m_CurrentSectionData.end())
        {
            Value = iter->second.c_str();
            return true;
        }
    }
    Value = lpDefault;
    return false;
}

std::string CIniFileBase::GetString(const char * lpSectionName, const char * lpKeyName, const char * lpDefault)
{
    std::string Value;
    GetString(lpSectionName, lpKeyName, lpDefault, Value);
    return Value;
}

uint32_t CIniFileBase::GetString(const char * lpSectionName, const char * lpKeyName, const char * lpDefault, char * lpReturnedString, uint32_t nSize)
{
    CGuard Guard(m_CS);

    std::string strSection;

    if (lpSectionName == nullptr || strlen(lpSectionName) == 0)
    {
        strSection = "default";
    }
    else
    {
        strSection = lpSectionName;
    }

    if (m_File.IsOpen() && MoveToSectionNameData(strSection.c_str(), true))
    {
        KeyValueList::iterator iter = m_CurrentSectionData.find(lpKeyName);
        if (iter != m_CurrentSectionData.end())
        {
            strncpy(lpReturnedString, iter->second.c_str(), nSize - 1);
            lpReturnedString[nSize - 1] = 0;
            return (uint32_t)strlen(lpReturnedString);
        }
    }
    strncpy(lpReturnedString, lpDefault, nSize - 1);
    lpReturnedString[nSize - 1] = 0;
    return (uint32_t)strlen(lpReturnedString);
}

uint32_t CIniFileBase::GetNumber(const char * lpSectionName, const char * lpKeyName, uint32_t nDefault)
{
    uint32_t Value;
    GetNumber(lpSectionName, lpKeyName, nDefault, Value);
    return Value;
}

bool CIniFileBase::GetNumber(const char * lpSectionName, const char * lpKeyName, uint32_t nDefault, uint32_t & Value)
{
    CGuard Guard(m_CS);

    if (lpSectionName == nullptr || strlen(lpSectionName) == 0)
    {
        lpSectionName = "default";
    }

    if (m_File.IsOpen() && MoveToSectionNameData(lpSectionName, true))
    {
        KeyValueList::iterator iter = m_CurrentSectionData.find(lpKeyName);
        if (iter != m_CurrentSectionData.end())
        {
            Value = 0;
            sscanf(iter->second.c_str(), "%u", &Value);
            return true;
        }
    }
    Value = nDefault;
    return false;
}

void CIniFileBase::SaveString(const char * lpSectionName, const char * lpKeyName, const char * lpString)
{
    if (m_ReadOnly)
    {
        return;
    }
    CGuard Guard(m_CS);
    if (!m_File.IsOpen())
    {
        if (lpString)
        {
            OpenIniFile();
        }
        if (!m_File.IsOpen())
        {
            return;
        }
    }
    std::string strSection;

    if (lpSectionName == nullptr || strlen(lpSectionName) == 0)
    {
        strSection = "default";
    }
    else
    {
        strSection = lpSectionName;
    }

    if (!MoveToSectionNameData(strSection.c_str(), true))
    {
        m_CurrentSection = strSection;
        m_CurrentSectionData.clear();
        m_CurrentSectionFilePos = -1;
    }

    KeyValueList::iterator iter = m_CurrentSectionData.find(lpKeyName);
    if (iter != m_CurrentSectionData.end())
    {
        if (lpString)
        {
            if (iter->second != lpString)
            {
                iter->second = lpString;
                m_CurrentSectionDirty = true;
            }
        }
        else
        {
            m_CurrentSectionData.erase(iter);
            m_CurrentSectionDirty = true;
        }
    }
    else
    {
        if (lpString)
        {
            m_CurrentSectionData.insert(KeyValueList::value_type(lpKeyName, lpString));
            m_CurrentSectionDirty = true;
        }
    }

    if (m_InstantFlush)
    {
        SaveCurrentSection();
    }
}

void CIniFileBase::SaveNumber(const char * lpSectionName, const char * lpKeyName, uint32_t Value)
{
    if (m_ReadOnly)
    {
        return;
    }
    // Translate the string to an ASCII version and save as text
    SaveString(lpSectionName, lpKeyName, FormatStr("%d", Value).c_str());
}

bool CIniFileBase::EntryExists(const char * lpSectionName, const char * lpKeyName)
{
    CGuard Guard(m_CS);

    if (lpSectionName == nullptr || strlen(lpSectionName) == 0)
    {
        lpSectionName = "default";
    }

    if (m_File.IsOpen() && MoveToSectionNameData(lpSectionName, true))
    {
        KeyValueList::iterator iter = m_CurrentSectionData.find(lpKeyName);
        if (iter != m_CurrentSectionData.end())
        {
            return true;
        }
    }
    return false;
}

void CIniFileBase::FlushChanges(void)
{
    CGuard Guard(m_CS);
    SaveCurrentSection();
}

void CIniFileBase::SetAutoFlush(bool AutoFlush)
{
    m_InstantFlush = AutoFlush;
    if (AutoFlush)
    {
        FlushChanges();
    }
}

void CIniFileBase::GetKeyList(const char * lpSectionName, strlist &List)
{
    List.clear();

    CGuard Guard(m_CS);
    if (!m_File.IsOpen())
    {
        return;
    }

    if (lpSectionName == nullptr || strlen(lpSectionName) == 0)
    {
        lpSectionName = "default";
    }

    if (MoveToSectionNameData(lpSectionName, true))
    {
        for (KeyValueList::iterator iter = m_CurrentSectionData.begin(); iter != m_CurrentSectionData.end(); iter++)
        {
            List.push_back(iter->first);
        }
    }
}

void CIniFileBase::GetKeyValueData(const char * lpSectionName, KeyValueData & List)
{
    CGuard Guard(m_CS);
    if (!m_File.IsOpen())
    {
        return;
    }

    std::string strSection;

    if (lpSectionName == nullptr || strlen(lpSectionName) == 0)
    {
        strSection = "default";
    }
    else
    {
        strSection = lpSectionName;
    }

    if (!MoveToSectionNameData(strSection.c_str(), false)) { return; }

    int MaxDataSize = 0, DataSize = 0, ReadPos = 0, result;
    std::unique_ptr<char> Data;
    char *Input = nullptr;
    do
    {
        result = GetStringFromFile(Input, Data, MaxDataSize, DataSize, ReadPos);
        if (result <= 1) { continue; }
        if (strlen(CleanLine(Input)) <= 1) { continue; }
        if (Input[0] == '[') { break; }
        char * Pos = strchr(Input, '=');
        if (Pos == nullptr) { continue; }
        Pos[0] = 0;

        List.insert(KeyValueData::value_type(stdstr(Input).Trim(), &Pos[1]));
    } while (result >= 0);
}

void CIniFileBase::SetCustomSort(SortData SortFunction)
{
    CGuard Guard(m_CS);
    m_SortFunction = SortFunction;
}

void CIniFileBase::ClearSectionPosList(long FilePos)
{
    if (FilePos <= 0)
    {
        m_SectionsPos.clear();
        m_lastSectionSearch = 0;
    }
    else
    {
        FILELOC::iterator iter = m_SectionsPos.begin();
        while (iter != m_SectionsPos.end())
        {
            FILELOC::iterator CurrentIter = iter;
            iter++;
            long TestFilePos = CurrentIter->second;
            if (TestFilePos > FilePos)
            {
                m_SectionsPos.erase(CurrentIter);
            }
        }
        m_lastSectionSearch = FilePos;
    }
}

void CIniFileBase::GetVectorOfSections(SectionList & sections)
{
    sections.clear();

    CGuard Guard(m_CS);
    if (!m_File.IsOpen())
    {
        return;
    }

    {
        std::string DoesNotExist = FormatStr("DoesNotExist%d%d%d", rand(), rand(), rand());
        MoveToSectionNameData(DoesNotExist.c_str(), false);
    }

    for (FILELOC::const_iterator iter = m_SectionsPos.begin(); iter != m_SectionsPos.end(); iter++)
    {
        sections.insert(iter->first);
    }
}

std::string CIniFileBase::FormatStr(const char * strFormat, ...)
{
    std::string FormatedStr;
    va_list args;
    va_start(args, strFormat);

    size_t nlen = _vscprintf(strFormat, args) + 1;
    char * buffer = (char *)alloca(nlen * sizeof(char));
    buffer[nlen - 1] = 0;
    if (buffer != nullptr)
    {
        vsprintf(buffer, strFormat, args);
        FormatedStr = buffer;
    }

    va_end(args);
    return FormatedStr;
}