mirror of https://github.com/LemonBoy/grape.git
102 lines
2.0 KiB
C
102 lines
2.0 KiB
C
#include <stdio.h>
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#include <nds.h>
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#include "emu.h"
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typedef struct state_hdr_t {
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u32 magic;
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u8 ver;
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u8 flags;
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u16 resv;
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} __attribute__((packed)) state_hdr_t;
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#define STATE_MAGIC (0x47525033)
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char *build_path (const int slot)
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{
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static char tmp[1024];
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if (basename)
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snprintf(tmp, sizeof(tmp), "%s.%03i", basename, slot);
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else
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snprintf(tmp, sizeof(tmp), "grape.%03i", slot);
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return tmp;
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}
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int state_save (const int slot)
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{
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FILE *f;
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state_hdr_t h;
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const char *path;
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path = build_path(slot+1);
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f = fopen(path, "wb");
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if (!f) {
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print_msg("Save failed!");
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return 0;
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}
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h.magic = STATE_MAGIC;
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h.ver = 1;
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h.flags = 0;
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h.resv = 0;
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fwrite(&h, 1, sizeof(state_hdr_t), f);
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fwrite(&cpu_regs, 6, 4, f);
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fwrite(&mainram, 1, sizeof(mainram), f);
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fwrite(&lcram, 1, sizeof(lcram), f);
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fwrite(&memmap_r, 0x10, 4, f);
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fwrite(&memmap_w, 0x10, 4, f);
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fwrite(&page_dirty, 1, 64, f);
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fwrite(&jstk_axis, 4, 4, f);
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fwrite(&jstk_btn, 3, 4, f);
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fwrite(&jstk_rst_cycle, 1, 4, f);
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fwrite(&keybd_latch, 1, 4, f);
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video_save(f);
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disk_save(f);
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fclose(f);
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return 1;
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}
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int state_load (const int slot)
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{
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FILE *f;
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state_hdr_t h;
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const char *path;
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path = build_path(slot+1);
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f = fopen(path, "rb");
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if (!f) {
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print_msg("Load failed!");
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return 0;
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}
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fread(&h, 1, sizeof(state_hdr_t), f);
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if (h.magic != STATE_MAGIC) {
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fclose(f);
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print_msg("Invalid save file!");
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return 0;
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}
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fread(&cpu_regs, 6, 4, f);
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fread(&mainram, 1, sizeof(mainram), f);
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fread(&lcram, 1, sizeof(lcram), f);
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fread(&memmap_r, 0x10, 4, f);
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fread(&memmap_w, 0x10, 4, f);
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fread(&page_dirty, 1, 64, f);
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fread(&jstk_axis, 4, 4, f);
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fread(&jstk_btn, 3, 4, f);
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fread(&jstk_rst_cycle, 1, 4, f);
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fread(&keybd_latch, 1, 4, f);
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video_load(f);
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disk_load(f);
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fclose(f);
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return 1;
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}
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