sf_damage_hook.c

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#include "sf_damage_hook.h"
 
#include "../sf_wrappers.h"
#include "../sf_hooks.h"
 
#include "../../registry/spell_data_registries/sf_spelldamage_registry.h"
#include "../../../api/sf_general_structures.h"
 
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
 
uint32_t g_damage_return_addr;
 
uint32_t __attribute__((no_caller_saved_registers,
                        thiscall)) sf_deal_damage(
    SF_CGdFigureToolbox *figureToolbox,
    uint16_t
    dmg_source,
    uint16_t dmg_target, uint32_t damage_amount,
    uint32_t is_spell_damage,
    uint32_t is_ranged_damage, uint32_t vry_unknown_6)
{
    /* TODO - rewrite this for later use after spell damage function call
       if ((((source != 0) && (iVar6 = CGdFigure::IsAlive(local_270->gd_figure,source), iVar6 != 0)) &&
        (iVar6 = HasSpellOnIt(local_270,source,0xa5), iVar6 != 0)) ||
        (iVar6 = HasSpellOnIt(local_270,target,0xa5), iVar6 != 0)) {
        local_29c = 1;
       }
     */
 
    bool check_spells_before_job = figureAPI.isFlagSet(figureToolbox->CGdFigure, dmg_target, F_CHECK_SPELLS_BEFORE_JOB);
    if (check_spells_before_job)
    {
        uint16_t spell_job_start_node = figureAPI.getSpellJobStartNode(figureToolbox->CGdFigure, dmg_target);
        uint16_t current_list_size = 0;
 
        uint32_t ids_by_phase[COUNT][799];
        size_t sizes_by_phase[COUNT] = {0};
 
        while (spell_job_start_node != 0)
        {
            uint16_t spell_index =
                toolboxAPI.getSpellIndexFromDLL(
                    figureToolbox->CGdDoubleLinkedList, spell_job_start_node);
            uint16_t spell_line_id =
                spellAPI.getSpellLine(figureToolbox->CGdSpell, spell_index);
            // collect spell_line_id & spell_index here to list
 
            for (int i = PRE; i < COUNT; ++i)
            {
                SpellDamagePhase phase = (SpellDamagePhase)i;
                damage_handler_ptr exists = get_spell_damage(spell_line_id,
                                                             phase);
                if (exists != NULL)
                {
                    ids_by_phase[phase][sizes_by_phase[phase]++] =
                        (spell_index << 0x10) | spell_line_id;
                    current_list_size++;
                }
            }
            spell_job_start_node = toolboxAPI.getNextNode(figureToolbox->CGdDoubleLinkedList, spell_job_start_node);
        }
 
        for (int i = PRE; i < COUNT; ++i)
        {
            SpellDamagePhase phase = (SpellDamagePhase)i;
 
            for (size_t i = 0; i < sizes_by_phase[phase]; ++i)
            {
                uint32_t packed_id = ids_by_phase[phase][i];
                uint16_t spell_line_id = packed_id & 0xffff;
                uint16_t spell_index = (packed_id >> 0x10);
                uint16_t spell_id = spellAPI.getSpellID(figureToolbox->CGdSpell,
                                                        spell_index);
                damage_handler_ptr spell_damage_func =
                    get_spell_damage(spell_line_id, phase);
                if(spell_damage_func != NULL)
                {
                    damage_amount = spell_damage_func(figureToolbox, dmg_source,
                                                      dmg_target, damage_amount,
                                                      is_spell_damage,
                                                      is_ranged_damage,
                                                      spell_id);
                }
            }
        }
    }
#if _DEBUG_
    log_error("Dealing Damage: %d", damage_amount);
#endif
    return damage_amount;
}

void __declspec(naked) sf_damage_hook()
{
    asm ("push 0x1c(%%ebp)          \n\t"
         "push 0x18(%%ebp)          \n\t"
         "push 0x14(%%ebp)          \n\t"
         "push 0x10(%%ebp)          \n\t"
         "push 0x0c(%%ebp)          \n\t"
         "push 0x08(%%ebp)          \n\t"
         "mov  -0x26c(%%ebp), %%ecx \n\t"
         "call %P0                  \n\t"
         "movw %%ax, 0x10(%%ebp)    \n\t"
         "jmp *%1                     " : : "i" (sf_deal_damage),
         "o" (g_damage_return_addr));
}