playdate: First shot at a Playdate port!

Author: icculus

CMakeLists.txt

@@ -84,6 +84,7 @@ set(PHYSFS_SRCS
     src/physfs_platform_os2.c
     src/physfs_platform_qnx.c
     src/physfs_platform_android.c
+    src/physfs_platform_playdate.c
     src/physfs_archiver_dir.c
     src/physfs_archiver_unpacked.c
     src/physfs_archiver_grp.c

src/physfs.c

@@ -1219,7 +1219,7 @@ int PHYSFS_init(const char *argv0)
 
     if ((allocator.Init != NULL) && (!allocator.Init())) return 0;
 
-    if (!__PHYSFS_platformInit())
+    if (!__PHYSFS_platformInit(argv0))
     {
         if (allocator.Deinit != NULL) allocator.Deinit();
         return 0;
@@ -3248,6 +3248,7 @@ const PHYSFS_Allocator *PHYSFS_getAllocator(void)
 } /* PHYSFS_getAllocator */
 
 
+#ifndef PHYSFS_NO_CRUNTIME_MALLOC
 static void *mallocAllocatorMalloc(PHYSFS_uint64 s)
 {
     if (!__PHYSFS_ui64FitsAddressSpace(s))
@@ -3271,16 +3272,18 @@ static void mallocAllocatorFree(void *ptr)
     #undef free
     free(ptr);
 } /* mallocAllocatorFree */
-
+#endif
 
 static void setDefaultAllocator(void)
 {
     assert(!externalAllocator);
     allocator.Init = NULL;
     allocator.Deinit = NULL;
+    #ifndef PHYSFS_NO_CRUNTIME_MALLOC
     allocator.Malloc = mallocAllocatorMalloc;
     allocator.Realloc = mallocAllocatorRealloc;
     allocator.Free = mallocAllocatorFree;
+    #endif
 } /* setDefaultAllocator */
 
 

src/physfs.h

@@ -524,6 +524,11 @@ typedef struct PHYSFS_AndroidInit
  *          succeed, but PHYSFS_getBaseDir() and PHYSFS_getPrefDir() will be
  *          incorrect.
  *
+ * \warning On Playdate, argv0 should be a non-NULL pointer to a PlaydateAPI
+ *          struct. PhysicsFS uses this object for system-level access and
+ *          will hold it until PHYSFS_deinit is called.
+ *          If you pass a NULL here, PhysicsFS will crash.
+ *
  *   \param argv0 the argv[0] string passed to your program's mainline.
  *          This may be NULL on most platforms (such as ones without a
  *          standard main() function), but you should always try to pass

src/physfs_internal.h

@@ -111,7 +111,9 @@ const void *__PHYSFS_winrtCalcPrefDir(void);
 
 /* atomic operations. */
 /* increment/decrement operations return the final incremented/decremented value. */
-#if defined(_MSC_VER) && (_MSC_VER >= 1500)
+#ifdef PHYSFS_PLATFORM_PLAYDATE
+#define PHYSFS_NEED_ATOMIC_OP_FALLBACK 1
+#elif defined(_MSC_VER) && (_MSC_VER >= 1500)
 #include <intrin.h>
 __PHYSFS_COMPILE_TIME_ASSERT(LongEqualsInt, sizeof (int) == sizeof (long));
 #define __PHYSFS_ATOMIC_INCR(ptrval) _InterlockedIncrement((long*)(ptrval))
@@ -130,6 +132,9 @@ extern __inline int _xadd_watcom(volatile int *a, int v);
 #define __PHYSFS_ATOMIC_DECR(ptrval) (_xadd_watcom(ptrval, -1)-1)
 #else
 #define PHYSFS_NEED_ATOMIC_OP_FALLBACK 1
+#endif
+
+#ifdef PHYSFS_NEED_ATOMIC_OP_FALLBACK
 int __PHYSFS_ATOMIC_INCR(int *ptrval);
 int __PHYSFS_ATOMIC_DECR(int *ptrval);
 #endif
@@ -466,12 +471,14 @@ void __PHYSFS_DirTreeDeinit(__PHYSFS_DirTree *dt);
 
 /*
  * Initialize the platform. This is called when PHYSFS_init() is called from
- *  the application.
+ *  the application. argv[0] (or whatever the app is passing) is
+ *  supplied here, since some platforms need it immediately, but this same
+ *  pointer is also passed to __PHYSFS_platformCalcBaseDir a little later.
  *
  * Return zero if there was a catastrophic failure (which prevents you from
  *  functioning at all), and non-zero otherwise.
  */
-int __PHYSFS_platformInit(void);
+int __PHYSFS_platformInit(const char *argv0);
 
 
 /*

src/physfs_platform_android.c

@@ -18,7 +18,7 @@
 static char *prefpath = NULL;
 
 
-int __PHYSFS_platformInit(void)
+int __PHYSFS_platformInit(const char *argv0)
 {
     return 1;  /* always succeed. */
 } /* __PHYSFS_platformInit */

src/physfs_platform_apple.m

@@ -16,7 +16,7 @@
 
 #include "physfs_internal.h"
 
-int __PHYSFS_platformInit(void)
+int __PHYSFS_platformInit(const char *argv0)
 {
     return 1;  /* success. */
 } /* __PHYSFS_platformInit */

src/physfs_platform_haiku.cpp

@@ -26,7 +26,7 @@
 
 #include "physfs_internal.h"
 
-int __PHYSFS_platformInit(void)
+int __PHYSFS_platformInit(const char *argv0)
 {
     return 1;  /* always succeed. */
 } /* __PHYSFS_platformInit */

src/physfs_platform_ogc.c

@@ -378,7 +378,7 @@ void __PHYSFS_platformReleaseMutex(void *mutex)
 
 
 
-int __PHYSFS_platformInit(void)
+int __PHYSFS_platformInit(const char *argv0)
 {
     return 1;  /* always succeed. */
 } /* __PHYSFS_platformInit */

src/physfs_platform_os2.c

@@ -292,7 +292,7 @@ static void prepUnicodeSupport(void)
 } /* prepUnicodeSupport */
 
 
-int __PHYSFS_platformInit(void)
+int __PHYSFS_platformInit(const char *argv0)
 {
     prepUnicodeSupport();
     return 1;  /* ready to go! */