Recsum.1sc

//------------------------------------------------
//--- 010 Editor v14.0 Script File
//
//      File: Recsum
//   Authors: ClayAmore
//   Version: 
//   Purpose: Recalculate checksums then save.
//  Category: 
//   History: 
//------------------------------------------------

int i = 0;
uint64 offset;
int slots_count = 0;
int active_slots_offset = 0x1901D04;
uchar buffer[0x280000];
uchar result[0x10];
string og_name = GetFileName();

int HEADER_SIZE = 0x300;
int CHARACTER_FILE_SIZE = 0x280000;
int CHECKSUM_SIZE = 0x10;
int USERDATA_10_SIZE = 0x60000;
int MAX_CHARACTER_COUNT = 10;

// Count active slots
while(i < 10) {
    if((ReadByte(active_slots_offset + 0x1*i)) == 1) slots_count++;
    i++;
}

// Recalculate checksum for active character slots
i = 0;
while(i < slots_count) {
    // Calculate the offset to the start of a character, skipping checksum bytes.
    offset = HEADER_SIZE + ((CHARACTER_FILE_SIZE + CHECKSUM_SIZE) * i); 
    // Move the cursor position to offset
    SetCursorPos( offset );
    // Read the bytes to buffer
    ReadBytes(buffer, offset + CHECKSUM_SIZE, CHARACTER_FILE_SIZE);
    // Calculcate checksum from bytes.
    ChecksumAlgArrayBytes( CHECKSUM_MD5, result, buffer, CHARACTER_FILE_SIZE);
    // Overwrite old checksum with the new checksum.
    WriteBytes(result, offset, CHECKSUM_SIZE);
    // Increment index
    i++;
}

// Recalculate checksum for USER_DATA_10
offset = HEADER_SIZE + (CHARACTER_FILE_SIZE * MAX_CHARACTER_COUNT);
SetCursorPos( offset );
ReadBytes(buffer, offset + CHECKSUM_SIZE, USERDATA_10_SIZE);
ChecksumAlgArrayBytes( CHECKSUM_MD5, result, buffer, USERDATA_10_SIZE);
WriteBytes(result, offset, CHECKSUM_SIZE);

// Save file
FileSave(og_name);