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Cheats: find the cheat file by CRC32.

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This commit is contained in:
sorgelig
2019-05-11 15:15:57 +08:00
parent c57a424724
commit fa3bd5e0dc
5 changed files with 90 additions and 11 deletions
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32
user_io.cpp
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@@ -11,7 +11,6 @@
#include <sys/statvfs.h>
#include "lib/lodepng/lodepng.h"
#include "hardware.h"
#include "osd.h"
#include "user_io.h"
@@ -29,6 +28,7 @@
#include "bootcore.h"
#include "charrom.h"
#include "scaler.h"
#include "miniz.h"
#include "support.h"
@@ -297,6 +297,8 @@ int user_io_get_joy_transl()
return joy_transl;
}
static int use_cheats = 0;
static void parse_config()
{
int i = 0;
@@ -362,6 +364,11 @@ static void parse_config()
substrcpy(s + strlen(s), p, 1);
OsdCoreNameSet(s);
}
if (p[0] == 'C')
{
use_cheats = 1;
}
}
i++;
} while (p || i<3);
@@ -1290,6 +1297,17 @@ static void send_pcolchr(const char* name, unsigned char index, int type)
}
}
static uint32_t file_crc;
uint32_t user_io_get_file_crc()
{
return file_crc;
}
int user_io_use_cheats()
{
return use_cheats;
}
int user_io_file_tx(const char* name, unsigned char index, char opensave, char mute, char composite)
{
fileTYPE f = {};
@@ -1351,6 +1369,7 @@ int user_io_file_tx(const char* name, unsigned char index, char opensave, char m
spi_write(buf, 512, fio_size);
DisableFpga();
//strip original SNES ROM header if present (not used)
if (bytes2send & 512)
{
bytes2send -= 512;
@@ -1358,6 +1377,9 @@ int user_io_file_tx(const char* name, unsigned char index, char opensave, char m
}
}
file_crc = 0;
uint32_t skip = bytes2send & 0x3FF; // skip possible header up to 1023 bytes
while (bytes2send)
{
printf(".");
@@ -1372,8 +1394,16 @@ int user_io_file_tx(const char* name, unsigned char index, char opensave, char m
DisableFpga();
bytes2send -= chunk;
if (skip >= chunk) skip -= chunk;
else
{
file_crc = crc32(file_crc, buf + skip, chunk - skip);
skip = 0;
}
}
printf("\n");
printf("CRC32: %08X\n", file_crc);
}
FileClose(&f);