static bool skipOneHexEscape()

in source/core_json.c [324:363]

• 33 lines of code
• 11 McCabe index (conditional complexity)

static bool skipOneHexEscape( const char * buf,
                              size_t * start,
                              size_t max,
                              uint16_t * outValue )
{
    bool ret = false;
    size_t i, end;
    uint16_t value = 0;

    assert( ( buf != NULL ) && ( start != NULL ) && ( max > 0U ) );
    assert( outValue != NULL );

    i = *start;
#define HEX_ESCAPE_LENGTH    ( 6U )   /* e.g., \u1234 */
    end = ( i <= ( SIZE_MAX - HEX_ESCAPE_LENGTH ) ) ? ( i + HEX_ESCAPE_LENGTH ) : SIZE_MAX;

    if( ( end < max ) && ( buf[ i ] == '\\' ) && ( buf[ i + 1U ] == 'u' ) )
    {
        for( i += 2U; i < end; i++ )
        {
            uint8_t n = hexToInt( buf[ i ] );

            if( n == NOT_A_HEX_CHAR )
            {
                break;
            }

            value = ( value << 4U ) | n;
        }
    }

    if( ( i == end ) && ( value > 0U ) )
    {
        ret = true;
        *outValue = value;
        *start = i;
    }

    return ret;
}