D:/Programming/GUI Editor (Source)/Logger.cpp

// Logger.cpp: implementation of the CLogger class.
//
#include "stdafx.h"
#include "Logger.h"

// Construction/Destruction

CLogger::CLogger()
{
        m_pFile = NULL;
}

CLogger::CLogger(char *pcFilename, bool bKeepOpen, bool bAppend)
{
        m_pFile = NULL;
        Open(pcFilename, bKeepOpen, bAppend);
}

CLogger::~CLogger()
{
        Close();
}

int CLogger::Open(char* pcFilename, bool bKeepOpen, bool bAppend)
{
        if(pcFilename == NULL)
                return -1;

        m_bKeepOpen = bKeepOpen;
        // Firstly, we open that file, and if it doesn't exist, we create it
        if(bAppend)
                m_pFile = fopen(pcFilename, "a+t");
        else
                m_pFile = fopen(pcFilename, "w+t");

        if(!bKeepOpen)  // If do not keep it open, close it, but we've already created it if it wasn't there with code above!
        {
                Close();

                if(strlen(pcFilename) > 256)
                        strncpy(m_strFilename, pcFilename, 256);
                else 
                        strcpy(m_strFilename, pcFilename);
        }

        return 1;
}

int CLogger::Write(const char *pcFormat, ...)
{
        if(pcFormat == NULL)                                                                    // If There's No Text
                return -1;                                                                              // Do Nothing

        char            text[256];                                                              // Holds Our CString
        va_list         ap;                                                                             // Pointer To List Of Arguments

        va_start(ap, pcFormat);                                                         // Parses The CString For Variables
            vsprintf(text, pcFormat, ap);                                               // And Converts Symbols To Actual Numbers
        va_end(ap);

        if(m_pFile == NULL)
        {
                if(m_strFilename == NULL)
                        return -1;

                m_pFile = fopen(m_strFilename, "w+t");
                if(m_pFile == NULL)
                        return -1;

                fprintf(m_pFile, "%s", text);
                
                if(!m_bKeepOpen)
                        Close();

                // All written OK, return OK too
                return 1;
        }
        else
        {
                fprintf(m_pFile, "%s", text);

                if(!m_bKeepOpen)
                        Close();

                return 1;
        }

        // File doesn't exist or haven't been open, return error
        return -1;
}

int CLogger::Append(const char *fmt, ...)
{
        if(fmt == NULL)                                                                         // If There's No Text
                return -1;                                                                              // Do Nothing

        char            text[256];                                                              // Holds Our CString
        va_list         ap;                                                                             // Pointer To List Of Arguments

        va_start(ap, fmt);                                                                      // Parses The CString For Variables
            vsprintf(text, fmt, ap);                                            // And Converts Symbols To Actual Numbers
        va_end(ap);

        if(m_pFile == NULL)
        {
                if(m_strFilename == NULL)
                        return -1;

                m_pFile = fopen(m_strFilename, "a+t");
                if(m_pFile == NULL)
                        return -1;

                fprintf(m_pFile, "%s", text);
                
                if(!m_bKeepOpen)
                        Close();

                // All written OK, return OK too
                return 1;
        }
        else
        {
                fprintf(m_pFile, "%s", text);

                if(!m_bKeepOpen)
                        Close();

                return 1;
        }

        return -1;
}

int CLogger::Erase()
{
        if(m_pFile == NULL)
                return -1;

        fseek(m_pFile, 0, SEEK_SET);
        fprintf(m_pFile, "");

        return 1;
}


int CLogger::Close()
{
        if(m_pFile == NULL)
                return -1;

        fclose(m_pFile);
        m_pFile = NULL;

        return 1;
}

int CLogger::GetError()
{
        if(m_pFile == NULL)
                return -1;

        return ferror(m_pFile);
}

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