Add support for Master System cheats.

[picodrive.git] / platform / libretro / libretro.c

diff --git a/platform/libretro/libretro.c b/platform/libretro/libretro.c
index 1b914d5..a1cf22c 100644 (file)
--- a/platform/libretro/libretro.c
+++ b/platform/libretro/libretro.c
@@ -692,7 +692,16 @@ bool retro_unserialize(const void *data, size_t size)
    return ret == 0;
 }
 
-/* cheats - TODO */
+typedef struct patch
+{
+       unsigned int addr;
+       unsigned short data;
+       unsigned char comp;
+} patch;
+
+extern void decode(char *buff, patch *dest);
+extern uint16_t m68k_read16(uint32_t a);
+extern void m68k_write16(uint32_t a, uint16_t d);
 
 void retro_cheat_reset(void)
 {
@@ -702,12 +711,13 @@ void retro_cheat_reset(void)
        for (i = 0; i < PicoPatchCount; i++)
        {
                addr = PicoPatches[i].addr;
-               if (addr < Pico.romsize)
+               if (addr < Pico.romsize) {
                        if (PicoPatches[i].active)
                                *(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old;
-               else
+               } else {
                        if (PicoPatches[i].active)
                                m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
+               }
        }
 
        PicoPatchUnload();
@@ -715,21 +725,19 @@ void retro_cheat_reset(void)
 
 void retro_cheat_set(unsigned index, bool enabled, const char *code)
 {
-       struct patch
-       {
-               unsigned int addr;
-               unsigned short data;
-       } pt;
-       int array_len = 0;
+       patch pt;
+       int array_len = PicoPatchCount;
+       char codeCopy[256];
        char *buff;
 
-       //TODO: Split multi-line codes properly
-       buff = strtok(code,"+");
+       if (code=='\0') return;
+       strcpy(codeCopy,code);
+       buff = strtok(codeCopy,"+");
 
-       while (buff)
+       while (buff != NULL)
        {
                decode(buff, &pt);
-               if (pt.addr == (unsigned int)-1 || pt.data == (unsigned short)-1)
+               if (pt.addr == (uint32_t) -1 || pt.data == (uint16_t) -1)
                {
                        log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff);
                        return;
@@ -750,15 +758,17 @@ void retro_cheat_set(unsigned index, bool enabled, const char *code)
                }
                strcpy(PicoPatches[PicoPatchCount].code, buff);
 
-               PicoPatches[PicoPatchCount].name[51] = "";
                PicoPatches[PicoPatchCount].active = enabled;
                PicoPatches[PicoPatchCount].addr = pt.addr;
                PicoPatches[PicoPatchCount].data = pt.data;
+               PicoPatches[PicoPatchCount].comp = pt.comp;
                if (PicoPatches[PicoPatchCount].addr < Pico.romsize)
-                       PicoPatches[PicoPatchCount].data_old = *(unsigned short *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
+                       PicoPatches[PicoPatchCount].data_old = *(uint16_t *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
                else
-                       PicoPatches[PicoPatchCount].data_old = (unsigned short) m68k_read16(PicoPatches[PicoPatchCount].addr);
+                       PicoPatches[PicoPatchCount].data_old = (uint16_t) m68k_read16(PicoPatches[PicoPatchCount].addr);
                PicoPatchCount++;
+
+               buff = strtok(NULL,"+");
        }
 }