Add name generation from id.

console/rom_ext.c

@@ -19,6 +19,7 @@
 #include "../boolean.h"
 #include "../libsnes.hpp"
 #include <string.h>
+#include <ctype.h>
 
 const char *ssnes_console_get_rom_ext(void)
 {
@@ -46,3 +47,29 @@ const char *ssnes_console_get_rom_ext(void)
    return NULL;
 }
 
+void ssnes_console_name_from_id(char *name, size_t size)
+{
+   if (size == 0)
+      return;
+
+   const char *id = snes_library_id();
+   if (!id || strlen(id) >= size)
+   {
+      name[0] = '\0';
+      return;
+   }
+
+   name[strlen(id)] = '\0';
+
+   for (size_t i = 0; i < size && id[i]; i++)
+   {
+      char c = id[i];
+      if (isspace(c) || isblank(c))
+         name[i] = '_';
+      else if (isupper(c))
+         name[i] = tolower(c);
+      else
+         name[i] = c;
+   }
+}
+

console/rom_ext.h

@@ -18,10 +18,15 @@
 #ifndef ROM_EXT_H__
 #define ROM_EXT_H__
 
+#include <stddef.h>
+
 // Get rom extensions for current library.
 // Infers info from snes_library_id().
 // Returns NULL if library doesn't have any preferences in particular.
 const char *ssnes_console_get_rom_ext(void);
 
+// Transforms a library id to a name suitable as a pathname.
+void ssnes_console_name_from_id(char *name, size_t size);
+
 #endif