From: kub <derkub@gmail.com>
Date: Sun, 28 May 2023 13:56:55 +0000 (+0000)
Subject: platform, basic msu-md support
X-Git-Tag: v2.00~223
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=02f3222feb0610b5ffd33f4139967dce829c8555;p=picodrive.git

platform, basic msu-md support

loading a .cue file will look for a cartridge image with the same basename
and an extension of "gen", "smd", "md", "32x".
---

diff --git a/platform/common/emu.c b/platform/common/emu.c
index d75d6e44..0f4ae169 100644
--- a/platform/common/emu.c
+++ b/platform/common/emu.c
@@ -182,6 +182,21 @@ static const char *find_bios(int *region, const char *cd_fname)
 			(*region == 8 ? "EU" : "JAP") : "USA");
 	}
 
+	// look for MSU.MD rom file. XXX another extension list? ugh...
+	static const char *md_exts[] = { "gen", "smd", "md", "32x" };
+	char *ext = strrchr(cd_fname, '.');
+	int extpos = ext ? ext-cd_fname : strlen(cd_fname);
+	strcpy(static_buff, cd_fname);
+	static_buff[extpos++] = '.';
+	for (i = 0; i < ARRAY_SIZE(md_exts); i++) {
+		strcpy(static_buff+extpos, md_exts[i]);
+		if (access(static_buff, R_OK) == 0) {
+			printf("found MSU rom: %s\n",static_buff);
+			return static_buff;
+		}
+	}
+
+	// locate BIOS file
 	if (*region == 4) { // US
 		files = biosfiles_us;
 		count = sizeof(biosfiles_us) / sizeof(char *);
diff --git a/platform/libretro/libretro.c b/platform/libretro/libretro.c
index abbe3128..2504cf90 100644
--- a/platform/libretro/libretro.c
+++ b/platform/libretro/libretro.c
@@ -1274,6 +1274,22 @@ static const char *find_bios(int *region, const char *cd_fname)
    int i, count;
    FILE *f = NULL;
 
+   // look for MSU.MD rom file. XXX another extension list? ugh...
+   static const char *md_exts[] = { "gen", "smd", "md", "32x" };
+   char *ext = strrchr(cd_fname, '.');
+   int extpos = ext ? ext-cd_fname : strlen(cd_fname);
+   strcpy(path, cd_fname);
+   path[extpos++] = '.';
+   for (i = 0; i < ARRAY_SIZE(md_exts); i++) {
+      strcpy(path+extpos, md_exts[i]);
+      f = fopen(path, "rb");
+      if (f != NULL) {
+         log_cb(RETRO_LOG_INFO, "found MSU rom: %s\n", path);
+	 fclose(f);
+         return path;
+      }
+   }
+
    if (*region == 4) { // US
       files = biosfiles_us;
       count = sizeof(biosfiles_us) / sizeof(char *);