The-Homebrew-Cloud/Genesis-Plus-GX
2
0
Fork 0
mirror of https://github.com/ekeeke/Genesis-Plus-GX.git synced 2024-09-20 21:29:46 +02:00
Code Issues Packages Projects Releases Wiki Activity

(Libretro) Update

Browse Source
This commit is contained in:
Twinaphex 2012-07-26 13:53:24 +02:00
parent d28fe8ee29
commit c003038c36
2 changed files with 76 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

99
libretro/libretro.c
View File

@ -112,7 +112,7 @@ void error(char * msg, ...)
va_end(ap);
}
int load_archive(char *filename, unsigned char *buffer, int maxsize)
int load_archive(char *filename, unsigned char *buffer, int maxsize, char *extension)
{
int size = 0;
char in[CHUNKSIZE];
@ -121,6 +121,12 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize)
/* Open file */
FILE *fd = fopen(filename, "rb");
/* Master System & Game Gear BIOS are optional files */
if (!strcmp(filename,MS_BIOS_US) || !strcmp(filename,MS_BIOS_EU) || !strcmp(filename,MS_BIOS_JP) || !strcmp(filename,GG_BIOS))
{
/* disable all messages */
}
/* Mega CD BIOS are required files */
if (!strcmp(filename,CD_BIOS_US) || !strcmp(filename,CD_BIOS_EU) || !strcmp(filename,CD_BIOS_JP))
{
@ -137,7 +143,6 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize)
fread(in, CHUNKSIZE, 1, fd);
{
int left;
/* Get file size */
fseek(fd, 0, SEEK_END);
size = ftell(fd);
@ -154,8 +159,15 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize)
sprintf((char *)msg,"Loading %d bytes ...", size);
fprintf(stderr, "INFORMATION - %s\n", msg);
/* filename extension */
if (extension)
{
memcpy(extension, &filename[strlen(filename) - 3], 3);
extension[3] = 0;
}
/* Read into buffer */
left = size;
int left = size;
while (left > CHUNKSIZE)
{
fread(buffer, CHUNKSIZE, 1, fd);
@ -174,7 +186,6 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize)
return size;
}
static uint16_t bitmap_data_[1024 * 512];
static void init_bitmap(void)
@ -294,14 +305,15 @@ static void configure_controls(void)
static int slot_load(int slot)
{
FILE *fp;
char filename[MAXPATHLEN];
unsigned long filesize, done = 0;
uint8_t *buffer;
/* File Type */
if (slot > 0)
{
fprintf(stderr, "INFORMATION - Loading State ...\n");
}
else
{
if (!sram.on || (system_hw == SYSTEM_MCD))
@ -314,14 +326,19 @@ static int slot_load(int slot)
}
/* Device Type */
{
/* FAT file */
if (slot > 0)
{
sprintf (filename,"%s/saves/%s.gp%d", DEFAULT_PATH, rom_filename, slot - 1);
}
else
{
sprintf (filename,"%s/saves/%s.srm", DEFAULT_PATH, rom_filename);
}
/* Open file */
fp = fopen(filename, "rb");
FILE *fp = fopen(filename, "rb");
if (!fp)
{
fprintf(stderr, "ERROR - Unable to open file.\n");
@ -356,6 +373,7 @@ static int slot_load(int slot)
/* Close file */
fclose(fp);
}
if (slot > 0)
{
@ -511,12 +529,17 @@ static void slot_autoload(int slot)
/* update CRC */
brm_crc[0] = crc32(0, scd.bram, 0x2000);
}
else
{
/* force internal backup RAM format (does not use previous region backup RAM) */
scd.bram[0x1fff] = 0;
}
/* check if internal backup RAM is correctly formatted */
if (memcmp(scd.bram + 0x2000 - 0x20, brm_format + 0x20, 0x20))
{
/* clear internal backup RAM */
memset(scd.bram, 0x00, 0x200);
memset(scd.bram, 0x00, 0x2000 - 0x40);
/* internal Backup RAM size fields */
brm_format[0x10] = brm_format[0x12] = brm_format[0x14] = brm_format[0x16] = 0x00;
@ -524,6 +547,9 @@ static void slot_autoload(int slot)
/* format internal backup RAM */
memcpy(scd.bram + 0x2000 - 0x40, brm_format, 0x40);
/* clear CRC to force file saving (in case previous region backup RAM was also formatted) */
brm_crc[0] = 0;
}
/* automatically load cartridge backup RAM (if enabled) */
@ -532,7 +558,24 @@ static void slot_autoload(int slot)
fp = fopen(CART_BRAM, "rb");
if (fp != NULL)
{
fread(scd.cartridge.area, scd.cartridge.mask + 1, 1, fp);
int filesize = scd.cartridge.mask + 1;
int done = 0;
/* Read into buffer (2k blocks) */
while (filesize > CHUNKSIZE)
{
fread(scd.cartridge.area + done, CHUNKSIZE, 1, fp);
done += CHUNKSIZE;
filesize -= CHUNKSIZE;
}
/* Read remaining bytes */
if (filesize)
{
fread(scd.cartridge.area + done, filesize, 1, fp);
}
/* close file */
fclose(fp);
/* update CRC */
@ -613,7 +656,24 @@ static void slot_autosave(int slot)
FILE *fp = fopen(CART_BRAM, "wb");
if (fp != NULL)
{
fwrite(scd.cartridge.area, scd.cartridge.mask + 1, 1, fp);
int filesize = scd.cartridge.mask + 1;
int done = 0;
/* Write to file (2k blocks) */
while (filesize > CHUNKSIZE)
{
fwrite(scd.cartridge.area + done, CHUNKSIZE, 1, fp);
done += CHUNKSIZE;
filesize -= CHUNKSIZE;
}
/* Write remaining bytes */
if (filesize)
{
fwrite(scd.cartridge.area + done, filesize, 1, fp);
}
/* Close file */
fclose(fp);
/* update CRC */
@ -1007,21 +1067,12 @@ void retro_run(void)
{
int aud;
switch(system_hw)
{
case SYSTEM_MCD:
system_frame_scd(0);
break;
case SYSTEM_MD:
case SYSTEM_PBC:
system_frame_gen(0);
break;
case SYSTEM_SMS:
system_frame_sms(0);
break;
default:
break;
}
if (system_hw == SYSTEM_MCD)
system_frame_scd(0);
else if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
system_frame_gen(0);
else
system_frame_sms(0);
#if defined(USE_NTSC)
video_cb(bitmap_data_ + bitmap.viewport.y * 1024, config.ntsc ? vwidth : bitmap.viewport.w, bitmap.viewport.h, 2048);

2
libretro/osd.h
View File

@ -109,6 +109,6 @@ extern int16 soundbuffer[3068];
#define VERSION "Genesis Plus GX 1.7.0 (libretro)"
void osd_input_update(void);
int load_archive(char *filename, unsigned char *buffer, int maxsize);
int load_archive(char *filename, unsigned char *buffer, int maxsize, char *extension);
#endif /* _OSD_H */