Restriction for the Adoption System

[WoflRoom]

Hello, my server has a season character system, and the character's rate is different from that of the others, so I would like to prevent it from being adopted, so that there is no abuse to quickly increase the Rank using the marriage system and adoption.

In src\map\pc.cpp I found where the restrictions are... 

Can I read here the single variable that I define in the character during his creation to return negative and not let him be adopted or make a query in MySQL on the "char_reg_num" table to validate his rate and block it?

 

enum adopt_responses pc_try_adopt(map_session_data *p1_sd, map_session_data *p2_sd, map_session_data *b_sd)
{
	if( !p1_sd || !p2_sd || !b_sd )
		return ADOPT_CHARACTER_NOT_FOUND;

	if( b_sd->status.father || b_sd->status.mother || b_sd->adopt_invite )
		return ADOPT_ALREADY_ADOPTED; // already adopted baby / in adopt request

	if( !p1_sd->status.partner_id || !p1_sd->status.party_id || p1_sd->status.party_id != b_sd->status.party_id )
		return ADOPT_MARRIED_AND_PARTY; // You need to be married and in party with baby to adopt

	if( p1_sd->status.partner_id != p2_sd->status.char_id || p2_sd->status.partner_id != p1_sd->status.char_id )
		return ADOPT_MARRIED_AND_PARTY; // Not married, wrong married

	if( p2_sd->status.party_id != p1_sd->status.party_id )
		return ADOPT_MARRIED_AND_PARTY; // Both parents need to be in the same party

	// Parents need to have their ring equipped
	if( !pc_isequipped(p1_sd, WEDDING_RING_M) && !pc_isequipped(p1_sd, WEDDING_RING_F) )
		return ADOPT_EQUIP_RINGS;

	if( !pc_isequipped(p2_sd, WEDDING_RING_M) && !pc_isequipped(p2_sd, WEDDING_RING_F) )
		return ADOPT_EQUIP_RINGS;

	// Already adopted a baby
	if( p1_sd->status.child || p2_sd->status.child ) {
		clif_Adopt_reply(p1_sd, ADOPT_REPLY_MORE_CHILDREN);
		return ADOPT_MORE_CHILDREN;
	}

	// Parents need at least lvl 70 to adopt
	if( p1_sd->status.base_level < 70 || p2_sd->status.base_level < 70 ) {
		clif_Adopt_reply(p1_sd, ADOPT_REPLY_LEVEL_70);
		return ADOPT_LEVEL_70;
	}

	if( b_sd->status.partner_id ) {
		clif_Adopt_reply(p1_sd, ADOPT_REPLY_MARRIED);
		return ADOPT_MARRIED;
	}

	if( !( ( b_sd->status.class_ >= JOB_NOVICE && b_sd->status.class_ <= JOB_THIEF ) || b_sd->status.class_ == JOB_SUPER_NOVICE || b_sd->status.class_ == JOB_SUPER_NOVICE_E ) )
		return ADOPT_NOT_NOVICE;

	return ADOPT_ALLOWED;
}

What syntax can I use to query variables here or make a query in the db?