cpl_conv.cpp

mitab,读取MapInfo的地图文件

/**
 * Scan up to a maximum number of characters from a string and convert
 * the result to a unsigned long.
 *
 * @param pszString String containing characters to be scanned. It may be
 * terminated with a null character.
 *
 * @param nMaxLength The maximum number of character to consider as part
 * of the number. Less characters will be considered if a null character
 * is encountered.
 * 
 * @return Unsigned long value, converted from its ASCII form.
 */

unsigned long CPLScanULong( const char *pszString, int nMaxLength )
{
    unsigned long    uValue;
    char    *pszValue = (char *)CPLMalloc( nMaxLength + 1);

/* -------------------------------------------------------------------- */
/*      Compute string into local buffer, and terminate it.             */
/* -------------------------------------------------------------------- */
    strncpy( pszValue, pszString, nMaxLength );
    pszValue[nMaxLength] = '\0';

/* -------------------------------------------------------------------- */
/*      Use strtoul() to fetch out the result                           */
/* -------------------------------------------------------------------- */
    uValue = strtoul( pszValue, NULL, 10 );

    CPLFree( pszValue );
    return uValue;
}

/************************************************************************/
/*                           CPLScanUIntBig()                           */
/************************************************************************/

/**
 * Extract big integer from string.
 *
 * Scan up to a maximum number of characters from a string and convert
 * the result to a GUIntBig. 
 *
 * @param pszString String containing characters to be scanned. It may be
 * terminated with a null character.
 *
 * @param nMaxLength The maximum number of character to consider as part
 * of the number. Less characters will be considered if a null character
 * is encountered.
 * 
 * @return GUIntBig value, converted from its ASCII form.
 */

GUIntBig CPLScanUIntBig( const char *pszString, int nMaxLength )
{
    GUIntBig    iValue;
    char        *pszValue = (char *)CPLMalloc( nMaxLength + 1);

/* -------------------------------------------------------------------- */
/*      Compute string into local buffer, and terminate it.             */
/* -------------------------------------------------------------------- */
    strncpy( pszValue, pszString, nMaxLength );
    pszValue[nMaxLength] = '\0';

/* -------------------------------------------------------------------- */
/*      Fetch out the result                                            */
/* -------------------------------------------------------------------- */
#if defined(WIN32) && defined(_MSC_VER)
    iValue = (GUIntBig)_atoi64( pszValue );
# elif HAVE_ATOLL
    iValue = atoll( pszValue );
#else
    iValue = atol( pszValue );
#endif

    CPLFree( pszValue );
    return iValue;
}

/************************************************************************/
/*                           CPLScanPointer()                           */
/************************************************************************/

/**
 * Extract pointer from string.
 *
 * Scan up to a maximum number of characters from a string and convert
 * the result to a pointer. 
 *
 * @param pszString String containing characters to be scanned. It may be
 * terminated with a null character.
 *
 * @param nMaxLength The maximum number of character to consider as part
 * of the number. Less characters will be considered if a null character
 * is encountered.
 * 
 * @return pointer value, converted from its ASCII form.
 */

void *CPLScanPointer( const char *pszString, int nMaxLength )
{
    void  *pResult;
    char  szTemp[128];

/* -------------------------------------------------------------------- */
/*      Compute string into local buffer, and terminate it.             */
/* -------------------------------------------------------------------- */
    if( nMaxLength > (int) sizeof(szTemp)-1 )
        nMaxLength = sizeof(szTemp)-1;

    strncpy( szTemp, pszString, nMaxLength );
    szTemp[nMaxLength] = '\0';

/* -------------------------------------------------------------------- */
/*      On MSVC we have to scanf pointer values without the 0x          */
/*      prefix.                                                         */
/* -------------------------------------------------------------------- */
    if( EQUALN(szTemp,"0x",2) )
    {
        pResult = NULL;

#if defined(WIN32) && defined(_MSC_VER)
        sscanf( szTemp+2, "%p", &pResult );
#else
        sscanf( szTemp, "%p", &pResult );
#endif
    }
    
    else
    {
#if SIZEOF_VOIDP == 8
        pResult = (void *) CPLScanUIntBig( szTemp, nMaxLength );
#else
        pResult = (void *) CPLScanULong( szTemp, nMaxLength );
#endif
    }

    return pResult;
}

/************************************************************************/
/*                             CPLScanDouble()                          */
/************************************************************************/

/**
 * Scan up to a maximum number of characters from a string and convert
 * the result to a double.
 *
 * @param pszString String containing characters to be scanned. It may be
 * terminated with a null character.
 *
 * @param nMaxLength The maximum number of character to consider as part
 * of the number. Less characters will be considered if a null character
 * is encountered.
 * 
 * @param pszLocale Pointer to a character string containing locale name
 * ("C", "POSIX", "us_US", "ru_RU.KOI8-R" etc.). If NULL, we will not
 * manipulate with locale settings and current process locale will be used for
 * printing. Wee need this setting because in different locales decimal
 * delimiter represented with the different characters. With the pszLocale
 * option we can control what exact locale will be used for scanning a numeric
 * value from the string (in most cases it should be C/POSIX).
 *
 * @return Double value, converted from its ASCII form.
 */

double CPLScanDouble( const char *pszString, int nMaxLength, char *pszLocale )
{
    int     i;
    double  dfValue;
    char    *pszValue = (char *)CPLMalloc( nMaxLength + 1);

/* -------------------------------------------------------------------- */
/*      Compute string into local buffer, and terminate it.             */
/* -------------------------------------------------------------------- */
    strncpy( pszValue, pszString, nMaxLength );
    pszValue[nMaxLength] = '\0';

/* -------------------------------------------------------------------- */
/*      Make a pass through converting 'D's to 'E's.                    */
/* -------------------------------------------------------------------- */
    for( i = 0; i < nMaxLength; i++ )
        if ( pszValue[i] == 'd' || pszValue[i] == 'D' )
            pszValue[i] = 'E';

/* -------------------------------------------------------------------- */
/*      Use atof() to fetch out the result                              */
/* -------------------------------------------------------------------- */
#if defined(HAVE_LOCALE_H) && defined(HAVE_SETLOCALE)
    char        *pszCurLocale = NULL;

    if ( pszLocale || EQUAL( pszLocale, "" ) )
    {
        // Save the current locale
        pszCurLocale = setlocale(LC_ALL, NULL );
        // Set locale to the specified value
        setlocale(LC_ALL, pszLocale );
    }
#endif

    dfValue = atof( pszValue );

#if defined(HAVE_LOCALE_H) && defined(HAVE_SETLOCALE)
    // Restore stored locale back
    if ( pszCurLocale )
        setlocale(LC_ALL, pszCurLocale );
#endif

    CPLFree( pszValue );
    return dfValue;
}

/************************************************************************/
/*                      CPLPrintString()                                */
/************************************************************************/

/**
 * Copy the string pointed to by pszSrc, NOT including the terminating
 * `\0' character, to the array pointed to by pszDest.
 *
 * @param pszDest Pointer to the destination string buffer. Should be
 * large enough to hold the resulting string.
 *
 * @param pszDest Pointer to the source buffer.
 * 
 * @param nMaxLen Maximum length of the resulting string. If string length
 * is greater than nMaxLen, it will be truncated.
 * 
 * @return Number of characters printed.
 */

int CPLPrintString( char *pszDest, const char *pszSrc, int nMaxLen )
{
    char    *pszTemp = pszDest;
    int     nChars = 0;

    if ( !pszDest )
        return 0;

    if ( !pszSrc )
    {
        *pszDest = '\0';
        return 1;
    }

    while ( nChars < nMaxLen && *pszSrc )
    {
        *pszTemp++ = *pszSrc++;
        nChars++;
    }

    return nChars;
}

/************************************************************************/
/*                         CPLPrintStringFill()                         */
/************************************************************************/

/**
 * Copy the string pointed to by pszSrc, NOT including the terminating
 * `\0' character, to the array pointed to by pszDest. Remainder of the
 * destination string will be filled with space characters. This is only
 * difference from the PrintString().
 *
 * @param pszDest Pointer to the destination string buffer. Should be
 * large enough to hold the resulting string.
 *
 * @param pszDest Pointer to the source buffer.
 * 
 * @param nMaxLen Maximum length of the resulting string. If string length
 * is greater than nMaxLen, it will be truncated.
 * 
 * @return Number of characters printed.
 */

int CPLPrintStringFill( char *pszDest, const char *pszSrc, int nMaxLen )
{
    char    *pszTemp = pszDest;

    if ( !pszDest )
        return 0;

    if ( !pszSrc )
    {
        memset( pszDest, ' ', nMaxLen );
        return nMaxLen;
    }

    while ( nMaxLen && *pszSrc )
    {
        *pszTemp++ = *pszSrc++;
        nMaxLen--;
    }

    if ( nMaxLen )
        memset( pszTemp, ' ', nMaxLen );

    return nMaxLen;
}

/************************************************************************/
/*                          CPLPrintInt32()                             */
/************************************************************************/

/**
 * Print GInt32 value into specified string buffer. This string will not
 * be NULL-terminated.
 *
 * @param Pointer to the destination string buffer. Should be
 * large enough to hold the resulting string. Note, that the string will
 * not be NULL-terminated, so user should do this himself, if needed.
 *
 * @param iValue Numerical value to print.
 * 
 * @param nMaxLen Maximum length of the resulting string. If string length
 * is greater than nMaxLen, it will be truncated.
 * 
 * @return Number of characters printed.
 */

int CPLPrintInt32( char *pszBuffer, GInt32 iValue, int nMaxLen )
{
    char    szTemp[64];

    if ( !pszBuffer )
        return 0;

    if ( nMaxLen >= 64 )
        nMaxLen = 63;

#if UINT_MAX == 65535
    sprintf( szTemp, "%*ld", nMaxLen, iValue );
#else
    sprintf( szTemp, "%*d", nMaxLen, iValue );
#endif

    return CPLPrintString( pszBuffer, szTemp, nMaxLen );
}

/************************************************************************/
/*                          CPLPrintUIntBig()                           */
/************************************************************************/

/**
 * Print GUIntBig value into specified string buffer. This string will not
 * be NULL-terminated.
 *
 * @param Pointer to the destination string buffer. Should be
 * large enough to hold the resulting string. Note, that the string will
 * not be NULL-terminated, so user should do this himself, if needed.
 *
 * @param iValue Numerical value to print.
 * 
 * @param nMaxLen Maximum length of the resulting string. If string length
 * is greater than nMaxLen, it will be truncated.
 * 
 * @return Number of characters printed.
 */

int CPLPrintUIntBig( char *pszBuffer, GUIntBig iValue, int nMaxLen )
{
    char    szTemp[64];

    if ( !pszBuffer )
        return 0;

    if ( nMaxLen >= 64 )
        nMaxLen = 63;

#if defined(WIN32) && defined(_MSC_VER)
    sprintf( szTemp, "%*I64d", nMaxLen, iValue );
# elif HAVE_LONG_LONG
    sprintf( szTemp, "%*lld", nMaxLen, (long long) iValue );
//    sprintf( szTemp, "%*Ld", nMaxLen, (long long) iValue );
#else
    sprintf( szTemp, "%*ld", nMaxLen, iValue );