initial commit

1 files changed, 457 insertions, 0 deletions

diff --git a/src/Platform_3DS.c b/src/Platform_3DS.c
new file mode 100644
index 0000000..9ee4703
--- /dev/null
+++ b/src/Platform_3DS.c
@@ -0,0 +1,457 @@
+#include "Core.h"
+#if defined CC_BUILD_3DS
+#include "_PlatformBase.h"
+#include "Stream.h"
+#include "ExtMath.h"
+#include "Funcs.h"
+#include "Window.h"
+#include "Utils.h"
+#include "Errors.h"
+#include "PackedCol.h"
+
+#include <errno.h>
+#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <poll.h>
+#include <stdio.h>
+#include <malloc.h>
+#include <netdb.h>
+#include <3ds.h>
+#include <citro3d.h>
+#include "_PlatformConsole.h"
+
+#define US_PER_SEC 1000000LL
+#define NS_PER_MS 1000000LL
+
+const cc_result ReturnCode_FileShareViolation = 1000000000; /* TODO: not used apparently */
+const cc_result ReturnCode_FileNotFound     = ENOENT;
+const cc_result ReturnCode_SocketInProgess  = EINPROGRESS;
+const cc_result ReturnCode_SocketWouldBlock = EWOULDBLOCK;
+const cc_result ReturnCode_DirectoryExists  = EEXIST;
+const char* Platform_AppNameSuffix = " 3DS";
+
+// https://gbatemp.net/threads/homebrew-development.360646/page-245
+// 3DS defaults to stack size of *32 KB*.. way too small
+unsigned int __stacksize__ = 256 * 1024;
+
+
+/*########################################################################################################################*
+*------------------------------------------------------Logging/Time-------------------------------------------------------*
+*#########################################################################################################################*/
+void Platform_Log(const char* msg, int len) {
+	// output to debug service (visible in Citra with log level set to "Debug.Emulated:Debug", or on console via remote gdb)
+	svcOutputDebugString(msg, len);
+}
+
+TimeMS DateTime_CurrentUTC(void) {
+	struct timeval cur;
+	gettimeofday(&cur, NULL);
+	return (cc_uint64)cur.tv_sec + UNIX_EPOCH_SECONDS;
+}
+
+void DateTime_CurrentLocal(struct DateTime* t) {
+	struct timeval cur; 
+	struct tm loc_time;
+	gettimeofday(&cur, NULL);
+	localtime_r(&cur.tv_sec, &loc_time);
+
+	t->year   = loc_time.tm_year + 1900;
+	t->month  = loc_time.tm_mon  + 1;
+	t->day    = loc_time.tm_mday;
+	t->hour   = loc_time.tm_hour;
+	t->minute = loc_time.tm_min;
+	t->second = loc_time.tm_sec;
+}
+
+cc_uint64 Stopwatch_Measure(void) {
+	return svcGetSystemTick();
+}
+
+cc_uint64 Stopwatch_ElapsedMicroseconds(cc_uint64 beg, cc_uint64 end) {
+	if (end < beg) return 0;	
+	// TODO: This doesn't seem to accurately measure time in Citra.
+	// hopefully it works better on a real 3DS?
+	
+	// See CPU_TICKS_PER_USEC in libctru/include/3ds/os.h
+	return (end - beg) * US_PER_SEC / SYSCLOCK_ARM11;
+}
+
+
+/*########################################################################################################################*
+*-----------------------------------------------------Directory/File------------------------------------------------------*
+*#########################################################################################################################*/
+static const cc_string root_path = String_FromConst("sdmc:/3ds/ClassiCube/");
+
+static void GetNativePath(char* str, const cc_string* path) {
+	Mem_Copy(str, root_path.buffer, root_path.length);
+	str += root_path.length;
+	String_EncodeUtf8(str, path);
+}
+
+cc_result Directory_Create(const cc_string* path) {
+	char str[NATIVE_STR_LEN];
+	GetNativePath(str, path);
+	
+	return mkdir(str, 0666) == -1 ? errno : 0; // FS has no permissions anyways
+}
+
+int File_Exists(const cc_string* path) {
+	char str[NATIVE_STR_LEN];
+	struct stat sb;
+	GetNativePath(str, path);
+	
+	return stat(str, &sb) == 0 && S_ISREG(sb.st_mode);
+}
+
+cc_result Directory_Enum(const cc_string* dirPath, void* obj, Directory_EnumCallback callback) {
+	cc_string path; char pathBuffer[FILENAME_SIZE];
+	char str[NATIVE_STR_LEN];
+	struct dirent* entry;
+	char* src;
+	int len, res, is_dir;
+
+	GetNativePath(str, dirPath);
+	DIR* dirPtr = opendir(str);
+	if (!dirPtr) return errno;
+
+	/* POSIX docs: "When the end of the directory is encountered, a null pointer is returned and errno is not changed." */
+	/* errno is sometimes leftover from previous calls, so always reset it before readdir gets called */
+	errno = 0;
+	String_InitArray(path, pathBuffer);
+
+	while ((entry = readdir(dirPtr))) {
+		path.length = 0;
+		String_Format1(&path, "%s/", dirPath);
+		src = entry->d_name;
+
+		len = String_Length(src);
+		String_AppendUtf8(&path, src, len);
+		is_dir = entry->d_type == DT_DIR;
+		/* TODO: fallback to stat when this fails */
+
+		if (is_dir) {
+			res = Directory_Enum(&path, obj, callback);
+			if (res) { closedir(dirPtr); return res; }
+		} else {
+			callback(&path, obj);
+		}
+		errno = 0;
+	}
+
+	res = errno; /* return code from readdir */
+	closedir(dirPtr);
+	return res;
+}
+
+static cc_result File_Do(cc_file* file, const cc_string* path, int mode) {
+	char str[NATIVE_STR_LEN];
+	GetNativePath(str, path);
+
+	*file = open(str, mode, 0666); // FS has no permissions anyways
+	return *file == -1 ? errno : 0;
+}
+
+cc_result File_Open(cc_file* file, const cc_string* path) {
+	return File_Do(file, path, O_RDONLY);
+}
+cc_result File_Create(cc_file* file, const cc_string* path) {
+	return File_Do(file, path, O_RDWR | O_CREAT | O_TRUNC);
+}
+cc_result File_OpenOrCreate(cc_file* file, const cc_string* path) {
+	return File_Do(file, path, O_RDWR | O_CREAT);
+}
+
+cc_result File_Read(cc_file file, void* data, cc_uint32 count, cc_uint32* bytesRead) {
+	*bytesRead = read(file, data, count);
+	return *bytesRead == -1 ? errno : 0;
+}
+
+cc_result File_Write(cc_file file, const void* data, cc_uint32 count, cc_uint32* bytesWrote) {
+	*bytesWrote = write(file, data, count);
+	return *bytesWrote == -1 ? errno : 0;
+}
+
+cc_result File_Close(cc_file file) {
+	return close(file) == -1 ? errno : 0;
+}
+
+cc_result File_Seek(cc_file file, int offset, int seekType) {
+	static cc_uint8 modes[3] = { SEEK_SET, SEEK_CUR, SEEK_END };
+	return lseek(file, offset, modes[seekType]) == -1 ? errno : 0;
+}
+
+cc_result File_Position(cc_file file, cc_uint32* pos) {
+	*pos = lseek(file, 0, SEEK_CUR);
+	return *pos == -1 ? errno : 0;
+}
+
+cc_result File_Length(cc_file file, cc_uint32* len) {
+	struct stat st;
+	if (fstat(file, &st) == -1) { *len = -1; return errno; }
+	*len = st.st_size; return 0;
+}
+
+
+/*########################################################################################################################*
+*--------------------------------------------------------Threading--------------------------------------------------------*
+*#########################################################################################################################*/
+void Thread_Sleep(cc_uint32 milliseconds) { 
+	svcSleepThread(milliseconds * NS_PER_MS); 
+}
+
+static void Exec3DSThread(void* param) {
+	((Thread_StartFunc)param)(); 
+}
+
+void Thread_Run(void** handle, Thread_StartFunc func, int stackSize, const char* name) {
+	//TODO: Not quite correct, but eh
+	*handle = threadCreate(Exec3DSThread, (void*)func, stackSize, 0x3f, -2, false);
+}
+
+void Thread_Detach(void* handle) {
+	Thread thread = (Thread)handle;
+	threadDetach(thread);
+}
+
+void Thread_Join(void* handle) {
+	Thread thread = (Thread)handle;
+	threadJoin(thread, U64_MAX);
+	threadFree(thread);
+}
+
+void* Mutex_Create(const char* name) {
+	LightLock* lock = (LightLock*)Mem_Alloc(1, sizeof(LightLock), "mutex");
+	LightLock_Init(lock);
+	return lock;
+}
+
+void Mutex_Free(void* handle) {
+	Mem_Free(handle);
+}
+
+void Mutex_Lock(void* handle) {
+	LightLock_Lock((LightLock*)handle);
+}
+
+void Mutex_Unlock(void* handle) {
+	LightLock_Unlock((LightLock*)handle);
+}
+
+void* Waitable_Create(const char* name) {
+	LightEvent* event = (LightEvent*)Mem_Alloc(1, sizeof(LightEvent), "waitable");
+	LightEvent_Init(event, RESET_ONESHOT);
+	return event;
+}
+
+void Waitable_Free(void* handle) {
+	Mem_Free(handle);
+}
+
+void Waitable_Signal(void* handle) {
+	LightEvent_Signal((LightEvent*)handle);
+}
+
+void Waitable_Wait(void* handle) {
+	LightEvent_Wait((LightEvent*)handle);
+}
+
+void Waitable_WaitFor(void* handle, cc_uint32 milliseconds) {
+	s64 timeout_ns = milliseconds * (1000 * 1000); // milliseconds to nanoseconds
+	LightEvent_WaitTimeout((LightEvent*)handle, timeout_ns);
+}
+
+
+/*########################################################################################################################*
+*---------------------------------------------------------Socket----------------------------------------------------------*
+*#########################################################################################################################*/
+cc_result Socket_ParseAddress(const cc_string* address, int port, cc_sockaddr* addrs, int* numValidAddrs) {
+	char str[NATIVE_STR_LEN];
+	char portRaw[32]; cc_string portStr;
+	struct addrinfo hints = { 0 };
+	struct addrinfo* result;
+	struct addrinfo* cur;
+	int i = 0;
+	
+	String_EncodeUtf8(str, address);
+	*numValidAddrs = 0;
+	struct sockaddr_in* addr4 = (struct sockaddr_in*)addrs[0].data;
+	if (inet_aton(str, &addr4->sin_addr) > 0) {
+		// TODO eliminate this path?
+		addr4->sin_family = AF_INET;
+		addr4->sin_port   = htons(port);
+		
+		addrs[0].size  = sizeof(*addr4);
+		*numValidAddrs = 1;
+		return 0;
+	}
+
+	hints.ai_family   = AF_INET; // TODO: you need this, otherwise resolving dl.dropboxusercontent.com crashes in Citra. probably something to do with IPv6 addresses
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_protocol = IPPROTO_TCP;
+	
+	String_InitArray(portStr,  portRaw);
+	String_AppendInt(&portStr, port);
+	portRaw[portStr.length] = '\0';
+
+	int res = getaddrinfo(str, portRaw, &hints, &result);
+	if (res == -NO_DATA) return SOCK_ERR_UNKNOWN_HOST;
+	if (res) return res;
+
+	for (cur = result; cur && i < SOCKET_MAX_ADDRS; cur = cur->ai_next, i++) 
+	{
+		if (!cur->ai_addrlen) break; 
+		// TODO citra returns empty addresses past first one? does that happen on real hardware too?
+		
+		SocketAddr_Set(&addrs[i], cur->ai_addr, cur->ai_addrlen);
+	}
+
+	freeaddrinfo(result);
+	*numValidAddrs = i;
+	return i == 0 ? ERR_INVALID_ARGUMENT : 0;
+}
+
+cc_result Socket_Connect(cc_socket* s, cc_sockaddr* addr, cc_bool nonblocking) {
+	struct sockaddr* raw = (struct sockaddr*)addr->data;
+	int res;
+
+	*s = socket(raw->sa_family, SOCK_STREAM, 0); // https://www.3dbrew.org/wiki/SOCU:socket
+	if (*s == -1) return errno;
+	
+	if (nonblocking) {
+		int flags = fcntl(*s, F_GETFL, 0);
+		if (flags >= 0) fcntl(*s, F_SETFL, flags | O_NONBLOCK);
+	}
+
+	res = connect(*s, raw, addr->size);
+	return res == -1 ? errno : 0;
+}
+
+cc_result Socket_Read(cc_socket s, cc_uint8* data, cc_uint32 count, cc_uint32* modified) {
+	int recvCount = recv(s, data, count, 0);
+	if (recvCount != -1) { *modified = recvCount; return 0; }
+	*modified = 0; return errno;
+}
+
+cc_result Socket_Write(cc_socket s, const cc_uint8* data, cc_uint32 count, cc_uint32* modified) {
+	int sentCount = send(s, data, count, 0);
+	if (sentCount != -1) { *modified = sentCount; return 0; }
+	
+	*modified = 0; return errno;
+}
+
+void Socket_Close(cc_socket s) {
+	shutdown(s, SHUT_RDWR);
+	close(s);
+}
+
+static cc_result Socket_Poll(cc_socket s, int mode, cc_bool* success) {
+	struct pollfd pfd;
+
+	pfd.fd     = s;
+	pfd.events = mode == SOCKET_POLL_READ ? POLLIN : POLLOUT;
+	if (poll(&pfd, 1, 0) == -1) { *success = false; return errno; }
+	
+	/* to match select, closed socket still counts as readable */
+	int flags = mode == SOCKET_POLL_READ ? (POLLIN | POLLHUP) : POLLOUT;
+	*success  = (pfd.revents & flags) != 0;
+	
+	return 0;
+}
+
+cc_result Socket_CheckReadable(cc_socket s, cc_bool* readable) {
+	return Socket_Poll(s, SOCKET_POLL_READ, readable);
+}
+
+cc_result Socket_CheckWritable(cc_socket s, cc_bool* writable) {
+	socklen_t resultSize = sizeof(socklen_t);
+	cc_result res = Socket_Poll(s, SOCKET_POLL_WRITE, writable);
+	if (res || *writable) return res;
+
+	// Actual 3DS hardware returns INPROGRESS error code if connect is still in progress
+	// Which is different from POSIX:
+	//   https://stackoverflow.com/questions/29479953/so-error-value-after-successful-socket-operation
+	getsockopt(s, SOL_SOCKET, SO_ERROR, &res, &resultSize);
+	Platform_Log1("--write poll failed-- = %i", &res);
+	if (res == -26) res = 0;
+	return res;
+}
+
+
+/*########################################################################################################################*
+*--------------------------------------------------------Platform---------------------------------------------------------*
+*#########################################################################################################################*/
+#define SOC_CTX_ALIGN 0x1000
+#define SOC_CTX_SIZE  0x1000 * 128
+
+static void CreateRootDirectory(const char* path) {
+	// create root directories (no permissions anyways)
+	int res = mkdir(path, 0666);
+	if (res >= 0) return;
+	
+	int err = errno;
+	Platform_Log2("mkdir %c FAILED: %i", path, &err);
+}
+
+void Platform_Init(void) {
+	// Take full advantage of new 3DS if running on it
+	osSetSpeedupEnable(true);
+	
+	// create root directories (no permissions anyways)
+	CreateRootDirectory("sdmc:/3ds");
+	CreateRootDirectory("sdmc:/3ds/ClassiCube");
+	
+	// See https://github.com/devkitPro/libctru/blob/master/libctru/include/3ds/services/soc.h
+	//  * @param context_addr Address of a page-aligned (0x1000) buffer to be used.
+	//  * @param context_size Size of the buffer, a multiple of 0x1000.
+	//  * @note The specified context buffer can no longer be accessed by the process which called this function, since the userland permissions for this block are set to no-access.
+	void* buffer = memalign(SOC_CTX_ALIGN, SOC_CTX_SIZE);
+	if (!buffer) return;
+	socInit(buffer, SOC_CTX_SIZE);
+}
+
+void Platform_Free(void) {
+	socExit();
+	// TODO free soc buffer? probably no point
+}
+
+cc_bool Platform_DescribeError(cc_result res, cc_string* dst) {
+	char chars[NATIVE_STR_LEN];
+	int len;
+
+	/* For unrecognised error codes, strerror_r might return messages */
+	/*  such as 'No error information', which is not very useful */
+	/* (could check errno here but quicker just to skip entirely) */
+	if (res >= 1000) return false;
+
+	len = strerror_r(res, chars, NATIVE_STR_LEN);
+	if (len == -1) return false;
+
+	len = String_CalcLen(chars, NATIVE_STR_LEN);
+	String_AppendUtf8(dst, chars, len);
+	return true;
+}
+
+cc_bool Process_OpenSupported = false;
+cc_result Process_StartOpen(const cc_string* args) {
+	return ERR_NOT_SUPPORTED;
+}
+
+
+/*########################################################################################################################*
+*-------------------------------------------------------Encryption--------------------------------------------------------*
+*#########################################################################################################################*/
+static cc_result GetMachineID(cc_uint32* key) {
+	// doesn't really matter if called multiple times
+	psInit();
+	return PS_GetDeviceId(key);
+}
+#endif