static SigV4Status_t scanValue()

in source/sigv4.c [889:959]
59 lines of code
12 McCabe index (conditional complexity)

static SigV4Status_t scanValue( const char * pDate,
                                const char formatChar,
                                size_t readLoc,
                                size_t lenToRead,
                                SigV4DateTime_t * pDateElements )
{
    SigV4Status_t returnStatus = SigV4InvalidParameter;
    const char * const pMonthNames[] = MONTH_NAMES;
    const char * pLoc = pDate + readLoc;
    size_t remainingLenToRead = lenToRead;
    int32_t result = 0;

    assert( pDate != NULL );
    assert( pDateElements != NULL );

    if( formatChar == '*' )
    {
        remainingLenToRead = 0U;
    }

    /* Determine if month value is non-numeric. */
    if( ( formatChar == 'M' ) && ( remainingLenToRead == MONTH_ASCII_LEN ) )
    {
        while( result++ < 12 )
        {
            /* Search month array for parsed string. */
            if( strncmp( pMonthNames[ result - 1 ], pLoc, MONTH_ASCII_LEN ) == 0 )
            {
                returnStatus = SigV4Success;
                break;
            }
        }

        if( returnStatus != SigV4Success )
        {
            LogError( ( "Unable to match string '%.3s' to a month value.",
                        pLoc ) );
            returnStatus = SigV4ISOFormattingError;
        }

        remainingLenToRead = 0U;
    }

    /* Interpret integer value of numeric representation. */
    while( ( remainingLenToRead > 0U ) && ( *pLoc >= '0' ) && ( *pLoc <= '9' ) )
    {
        result = ( result * 10 ) + ( int32_t ) ( *pLoc - '0' );
        remainingLenToRead--;
        pLoc += 1;
    }

    if( remainingLenToRead != 0U )
    {
        LogError( ( "Parsing Error: Expected numerical string of type '%%%d%c', "
                    "but received '%.*s'.",
                    ( int ) lenToRead,
                    formatChar,
                    ( int ) lenToRead,
                    pLoc ) );
        returnStatus = SigV4ISOFormattingError;
    }

    if( returnStatus != SigV4ISOFormattingError )
    {
        addToDate( formatChar,
                   result,
                   pDateElements );
    }

    return returnStatus;
}