static SigV4Status_t parseDate()

in source/sigv4.c [947:1013]
55 lines of code
6 McCabe index (conditional complexity)

static SigV4Status_t parseDate( const char * pDate,
                                size_t dateLen,
                                const char * pFormat,
                                size_t formatLen,
                                SigV4DateTime_t * pDateElements )
{
    SigV4Status_t returnStatus = SigV4InvalidParameter;
    size_t readLoc = 0U, formatIndex = 0U;
    uint8_t lenToRead = 0U;

    assert( pDate != NULL );
    assert( pFormat != NULL );
    assert( pDateElements != NULL );
    ( void ) dateLen;

    /* Loop through the format string. */
    while( ( formatIndex < formatLen ) && ( returnStatus != SigV4ISOFormattingError ) )
    {
        if( pFormat[ formatIndex ] == '%' )
        {
            /* '%' must be followed by a length and type specification. */
            assert( formatIndex < formatLen - 2 );
            formatIndex++;

            /* Numerical value of length specifier character. */
            lenToRead = ( ( uint8_t ) pFormat[ formatIndex ] - ( uint8_t ) '0' );
            formatIndex++;

            /* Ensure read is within buffer bounds. */
            assert( readLoc + lenToRead - 1 < dateLen );
            returnStatus = scanValue( pDate,
                                      pFormat[ formatIndex ],
                                      readLoc,
                                      lenToRead,
                                      pDateElements );

            readLoc += lenToRead;
        }
        else if( pDate[ readLoc ] != pFormat[ formatIndex ] )
        {
            LogError( ( "Parsing error: Expected character '%c', "
                        "but received '%c'.",
                        pFormat[ formatIndex ], pDate[ readLoc ] ) );
            returnStatus = SigV4ISOFormattingError;
        }
        else
        {
            readLoc++;
            LogDebug( ( "Successfully matched character '%c' found in format string.",
                        pDate[ readLoc - 1 ] ) );
        }

        formatIndex++;
    }

    if( ( returnStatus != SigV4ISOFormattingError ) )
    {
        returnStatus = SigV4Success;
    }
    else
    {
        LogError( ( "Parsing Error: Date did not match expected string format." ) );
        returnStatus = SigV4ISOFormattingError;
    }

    return returnStatus;
}