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Refactor sub_6A9DE1. Now uses known structures.

This commit is contained in:
Duncan Frost 2015-02-26 18:42:25 +00:00
parent ac2415a949
commit 4905e85cd9
1 changed files with 17 additions and 23 deletions
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40
src/object.c
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@ -384,34 +384,28 @@ int object_calculate_checksum(const rct_object_entry *entry, const char *data, i
return checksum;
}
/* ebp is made up of 3 pointers: no_elements, unknown, g1_source */
int sub_6A9ED1(uint8_t** ebp)
{
int result;
int eax = result = RCT2_GLOBAL(0x9ADAF0, uint32_t);
int ecx = ((uint32_t*)(*ebp))[0];
int ebx = ecx;
ebx += eax;
RCT2_GLOBAL(0x9ADAF0, uint32_t) = ebx;
ebx = ecx;
ebx *= 0x10;
(*ebp) += 8;
ebx += (uint32_t)(*ebp);
int g1_offset = eax;
g1_offset *= 0x10;
int edx = 0;
while (true)
{
RCT2_GLOBAL(RCT2_ADDRESS_G1_ELEMENTS + g1_offset, rct_g1_element) = ((rct_g1_element*)(edx + (*ebp)))[0];
RCT2_GLOBAL(RCT2_ADDRESS_G1_ELEMENTS + g1_offset, rct_g1_element).offset += ebx;
g1_offset += 0x10;
edx += 0x10;
ecx--;
if (ecx == 0) break;
int no_elements = ((uint32_t*)(*ebp))[0];
RCT2_GLOBAL(0x9ADAF0, uint32_t) = no_elements + eax;
rct_g1_element* g1_dest = &RCT2_ADDRESS(RCT2_ADDRESS_G1_ELEMENTS, rct_g1_element)[eax];
rct_g1_element* g1_source = (rct_g1_element*)((*ebp) + 8);
int ebx = no_elements * sizeof(rct_g1_element) + (uint32)g1_source;
for (int i = 0; i < no_elements; ++i){
*g1_dest = *g1_source++;
g1_dest->offset += ebx;
g1_dest++;
}
ebx = ((uint32_t*)((*ebp) - 8))[0];
ebx *= 0x10;
(*ebp) += ((uint32_t*)((*ebp) - 4))[0];
(*ebp) += ebx;
(*ebp) += 8;
(*ebp) += *((uint32_t*)((*ebp) - 4));
(*ebp) += no_elements * sizeof(rct_g1_element);
return result;
}