source: liacs/MIR2010/SourceCode/config.cpp@ 144

#include "config.h"

#include <io.h>
#include <stdarg.h>

// compare strings
bool StringCompare(const string &word1, const string &word2)
{
        if (word1.compare(word2) < 0)
                return true;
        return false;
}
bool StringIdentical(const string &word1, const string &word2)
{
        if (word1.compare(word2) == 0)
                return true;
        return false;
}

// safe print string
void SAFE_SPRINTF(char *buffer, size_t count, const char *format, ...)
{
        if (buffer && count > 0)
        {
                va_list argptr;
                va_start(argptr, format);
                int chars = _vsnprintf(buffer, count, format, argptr);
                va_end(argptr);
                if (chars == count)
                {
                        // no null-terminator was appended, we need to do that ourselves
                        buffer[count-1] = '\0';
                }
                else if (chars == -1)
                {
                        // length of formatted string exceeded length of buffer, and no
                        // null-terminator was appended
                        buffer[count-1] = '\0';
                }
        }
}

// print string using variable amount of arguments
char* SAFE_VAPRINT(const char *format, ...)
{
        va_list argptr;
        static char     string[2][32000];       // in case va is called by nested functions
        static int index = 0;
        char *buf;

        buf = string[index & 1];
        index++;

        va_start(argptr, format);
        _vsnprintf(buf, 31999, format, argptr);
        va_end(argptr);

        return buf;
}

// easy print to debug window
void SAFE_DEBUG(const char *format, ...)
{
        va_list argptr;
        static char     string[2][32000];       // in case va is called by nested functions
        static int index = 0;
        char *buf;

        buf = string[index & 1];
        index++;

        va_start(argptr, format);
        _vsnprintf(buf, 31999, format, argptr);
        va_end(argptr);

        OutputDebugString(buf);
}

// safe print string to file and immediately flush it
void SAFE_FLUSHPRINT(FILE *file, const char *format, ...)
{
        va_list argptr;
        va_start(argptr, format);
        vfprintf(file, format, argptr);
        va_end(argptr);
        fflush(file);
}

// safe read line from file
bool SAFE_GETLINE(char *buffer, unsigned int buffersize, unsigned int &linelength, FILE *file)
{
        if (buffer == NULL || buffersize == 0 || file == NULL)
                return false;
        // read line from file
        if (fgets(buffer, buffersize, file) == NULL)
                return false;
        // trim newline character that fgets normally reads as well
        linelength = (unsigned int)strlen(buffer);
        if (linelength > 0 && buffer[linelength-1] == '\n')
                buffer[--linelength] = '\0';
        return true;
}

// quick load file from disk
bool SAFE_LOADFILE(const char *fname, unsigned char **data, unsigned int &length)
{
        if (fname == NULL || data == NULL)
                return false;
        FILE *file = fopen(fname, "rb");
        if (file == NULL)
                return false;
        // load the file
        bool success = SAFE_LOADFILE(file, data, length);
        fclose(file);
        return success;
}

bool SAFE_LOADFILE(FILE *file, unsigned char **data, unsigned int &length)
{
        // determine size of file
        if (fseek(file, 0L, SEEK_END) != 0)
                return false;
        long pos = ftell(file);
        if (pos <= 0)
                return false;
        rewind(file);
        // read all data
        unsigned char *dat = NEW unsigned char[pos];
        if (fread(dat, pos, 1, file) != 1)
        {
                SAFE_DELETE_ARRAY(dat);
                return false;
        }
        *data = dat;
        length = pos;
        return true;
}

static int stderro = -1;
static FILE *redirect = NULL;
bool RedirectStderr(const char *fname)
{
        if (redirect != NULL)
                return false;
        stderro = _dup(_fileno(stderr));
        if (stderro == -1)
                return false;
        redirect = fopen(fname, "a");
        if (redirect == NULL)
                return false;
        if (_dup2(_fileno(redirect), 2) == -1)
        {
                fclose(redirect);
                return false;
        }
        return true;
}

bool RestoreStderr()
{
        if (redirect == NULL)
                return false;
        fflush(stderr);
        _dup2(stderro, _fileno(stderr));
        fclose(redirect);
        redirect = NULL;
        return true;
}

void CenterWindow(HWND hWnd)
{
        if (hWnd == NULL)
                return;
        // center the window (code taken from MSDN: "Using Dialog Boxes")
        HWND hParent;
        RECT rcParent, rcWnd, rc;
        if ((hParent = GetParent(hWnd)) == NULL) 
        {
                hParent = GetDesktopWindow();
                assert(hParent != NULL);
        }
        GetWindowRect(hParent, &rcParent); 
        GetWindowRect(hWnd, &rcWnd); 
        CopyRect(&rc, &rcParent);
        OffsetRect(&rcWnd, -rcWnd.left, -rcWnd.top); 
        OffsetRect(&rc, -rc.left, -rc.top); 
        OffsetRect(&rc, -rcWnd.right, -rcWnd.bottom); 
        SetWindowPos(hWnd, HWND_TOP, rcParent.left + (rc.right / 2),
                rcParent.top + (rc.bottom / 2),  0, 0, SWP_NOSIZE);
}