duuqnd/cave-story-solaris
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Remove MycParam.cpp's dependency on SDL

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Instead we just encrypt/decrypt the 290.rec data in an
endian-neutral way.
This commit is contained in:
Clownacy 2020-01-26 14:45:36 +00:00
parent 331d5a2d95
commit dfd50ecf8d
1 changed files with 21 additions and 19 deletions
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40
src/MycParam.cpp
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@ -2,8 +2,6 @@
#include <stdio.h>
#include "SDL.h"
#include "WindowsWrapper.h"
#include "ArmsItem.h"
@ -432,7 +430,7 @@ void PutTimeCounter(int x, int y)
BOOL SaveTimeCounter(void)
{
int i;
unsigned char *p;
unsigned char p[4];
REC rec;
FILE *fp;
char path[MAX_PATH];
@ -458,11 +456,13 @@ BOOL SaveTimeCounter(void)
rec.random[3] = fgetc(fp);
fclose(fp);
p = (unsigned char*)&rec.counter[0];
p[0] -= (SDL_BYTEORDER == SDL_LIL_ENDIAN) ? (rec.random[0]) : (rec.random[0] / 2);
p[1] -= rec.random[0];
p[2] -= rec.random[0];
p[3] -= (SDL_BYTEORDER == SDL_LIL_ENDIAN) ? (rec.random[0] / 2) : (rec.random[0]);
p[0] = (unsigned char)(rec.counter[0] - rec.random[0]);
p[1] = (unsigned char)((rec.counter[0] >> 8) - rec.random[0]);
p[2] = (unsigned char)((rec.counter[0] >> 16) - rec.random[0]);
p[3] = (unsigned char)((rec.counter[0] >> 24) - rec.random[0] / 2);
rec.counter[0] = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
// If this is faster than our new time, quit
if (rec.counter[0] < time_count)
return TRUE;
@ -474,11 +474,12 @@ BOOL SaveTimeCounter(void)
rec.counter[i] = time_count;
rec.random[i] = Random(0, 250) + i;
p = (unsigned char*)&rec.counter[i];
p[0] += (SDL_BYTEORDER == SDL_LIL_ENDIAN) ? (rec.random[i]) : (rec.random[i] / 2);
p[1] += rec.random[i];
p[2] += rec.random[i];
p[3] += (SDL_BYTEORDER == SDL_LIL_ENDIAN) ? (rec.random[i] / 2) : (rec.random[i]);
p[0] = (unsigned char)(rec.counter[i] + rec.random[i]);
p[1] = (unsigned char)((rec.counter[i] >> 8) + rec.random[i]);
p[2] = (unsigned char)((rec.counter[i] >> 16) + rec.random[i]);
p[3] = (unsigned char)((rec.counter[i] >> 24) + rec.random[i] / 2);
rec.counter[i] = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
}
fp = fopen(path, "wb");
@ -501,7 +502,7 @@ BOOL SaveTimeCounter(void)
int LoadTimeCounter(void)
{
int i;
unsigned char *p;
unsigned char p[4];
REC rec;
FILE *fp;
char path[MAX_PATH];
@ -527,11 +528,12 @@ int LoadTimeCounter(void)
// Decode from checksum
for (i = 0; i < 4; ++i)
{
p = (unsigned char*)&rec.counter[i];
p[0] -= (SDL_BYTEORDER == SDL_LIL_ENDIAN) ? (rec.random[i]) : (rec.random[i] / 2);
p[1] -= rec.random[i];
p[2] -= rec.random[i];
p[3] -= (SDL_BYTEORDER == SDL_LIL_ENDIAN) ? (rec.random[i] / 2) : (rec.random[i]);
p[0] = (unsigned char)(rec.counter[i] - rec.random[i]);
p[1] = (unsigned char)((rec.counter[i] >> 8) - rec.random[i]);
p[2] = (unsigned char)((rec.counter[i] >> 16) - rec.random[i]);
p[3] = (unsigned char)((rec.counter[i] >> 24) - rec.random[i] / 2);
rec.counter[i] = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
}
// Verify checksum's result