From: notaz Date: Mon, 17 Dec 2012 00:02:10 +0000 (+0200) Subject: libretro: support savestates and cheats X-Git-Tag: r18~42 X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6e921e1d669037004dab55cbe5e704a70d04c718;p=pcsx_rearmed.git libretro: support savestates and cheats cheats untested --- diff --git a/frontend/libretro.c b/frontend/libretro.c index 0869a258..e7153ac6 100644 --- a/frontend/libretro.c +++ b/frontend/libretro.c @@ -13,6 +13,7 @@ #include "../libpcsxcore/psxcounters.h" #include "../libpcsxcore/psxmem_map.h" #include "../libpcsxcore/new_dynarec/new_dynarec.h" +#include "../libpcsxcore/cheat.h" #include "../plugins/dfsound/out.h" #include "../plugins/gpulib/cspace.h" #include "main.h" @@ -262,28 +263,127 @@ void retro_get_system_av_info(struct retro_system_av_info *info) info->geometry.aspect_ratio = 4.0 / 3.0; } -/* TODO */ +/* savestates */ size_t retro_serialize_size(void) { - return 0; + // it's currently 4380651 bytes, but have some reserved for future + return 0x430000; +} + +struct save_fp { + char *buf; + size_t pos; + int is_write; +}; + +static void *save_open(const char *name, const char *mode) +{ + struct save_fp *fp; + + if (name == NULL || mode == NULL) + return NULL; + + fp = malloc(sizeof(*fp)); + if (fp == NULL) + return NULL; + + fp->buf = (char *)name; + fp->pos = 0; + fp->is_write = (mode[0] == 'w' || mode[1] == 'w'); + + return fp; +} + +static int save_read(void *file, void *buf, u32 len) +{ + struct save_fp *fp = file; + if (fp == NULL || buf == NULL) + return -1; + + memcpy(buf, fp->buf + fp->pos, len); + fp->pos += len; + return len; +} + +static int save_write(void *file, const void *buf, u32 len) +{ + struct save_fp *fp = file; + if (fp == NULL || buf == NULL) + return -1; + + memcpy(fp->buf + fp->pos, buf, len); + fp->pos += len; + return len; +} + +static long save_seek(void *file, long offs, int whence) +{ + struct save_fp *fp = file; + if (fp == NULL) + return -1; + + switch (whence) { + case SEEK_CUR: + fp->pos += offs; + return fp->pos; + case SEEK_SET: + fp->pos = offs; + return fp->pos; + default: + return -1; + } +} + +static void save_close(void *file) +{ + struct save_fp *fp = file; + size_t r_size = retro_serialize_size(); + if (fp == NULL) + return; + + if (fp->pos > r_size) + SysPrintf("ERROR: save buffer overflow detected\n"); + else if (fp->is_write && fp->pos < r_size) + // make sure we don't save trash in leftover space + memset(fp->buf + fp->pos, 0, r_size - fp->pos); + free(fp); } bool retro_serialize(void *data, size_t size) { - return false; + int ret = SaveState(data); + return ret == 0 ? true : false; } bool retro_unserialize(const void *data, size_t size) { - return false; + int ret = LoadState(data); + return ret == 0 ? true : false; } void retro_cheat_reset(void) { + ClearAllCheats(); } void retro_cheat_set(unsigned index, bool enabled, const char *code) { + char buf[256]; + int ret; + + // cheat funcs are destructive, need a copy.. + strncpy(buf, code, sizeof(buf)); + buf[sizeof(buf) - 1] = 0; + + if (index < NumCheats) + ret = EditCheat(index, "", buf); + else + ret = AddCheat("", buf); + + if (ret != 0) + SysPrintf("Failed to set cheat %#u\n", index); + else if (index < NumCheats) + Cheats[index].Enabled = enabled; } bool retro_load_game(const struct retro_game_info *info) @@ -462,6 +562,12 @@ void retro_init(void) McdDisable[0] = 0; McdDisable[1] = 1; init_memcard(Mcd1Data); + + SaveFuncs.open = save_open; + SaveFuncs.read = save_read; + SaveFuncs.write = save_write; + SaveFuncs.seek = save_seek; + SaveFuncs.close = save_close; } void retro_deinit(void)