initial commit

1 files changed, 501 insertions, 0 deletions

diff --git a/src/Platform_NDS.c b/src/Platform_NDS.c
new file mode 100644
index 0000000..496722a
--- /dev/null
+++ b/src/Platform_NDS.c
@@ -0,0 +1,501 @@
+#include "Core.h"
+#if defined CC_BUILD_NDS
+#include "_PlatformBase.h"
+#include "Stream.h"
+#include "ExtMath.h"
+#include "Funcs.h"
+#include "Window.h"
+#include "Utils.h"
+#include "Errors.h"
+#include "Options.h"
+#include "Animations.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <nds/bios.h>
+#include <nds/cothread.h>
+#include <nds/interrupts.h>
+#include <nds/timers.h>
+#include <nds/debug.h>
+#include <nds/system.h>
+#include <nds/arm9/dldi.h>
+#include <nds/arm9/sdmmc.h>
+#include <fat.h>
+#include <dswifi9.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <dirent.h>
+#include "_PlatformConsole.h"
+
+const cc_result ReturnCode_FileShareViolation = 1000000000; // not used
+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 = " NDS";
+extern cc_bool keyboardOpen;
+
+
+/*########################################################################################################################*
+*------------------------------------------------------Logging/Time-------------------------------------------------------*
+*#########################################################################################################################*/
+static u32 last_raw;
+static u64 base_time;
+
+cc_uint64 Stopwatch_ElapsedMicroseconds(cc_uint64 beg, cc_uint64 end) {
+	if (end < beg) return 0;
+
+	return timerTicks2usec(end - beg);
+}
+
+cc_uint64 Stopwatch_Measure(void) {
+	u32 raw = cpuGetTiming();
+	// Since counter is only a 32 bit integer, it overflows after a minute or two
+	if (last_raw > 0xF0000000 && raw < 0x10000000) {
+		base_time += 0x100000000ULL;
+	}
+
+	last_raw = raw;
+	return base_time + raw;
+}
+
+static void LogNocash(const char* msg, int len) {
+    // Can only be up to 120 bytes total
+	char buffer[120];
+	len = min(len, 118);
+	
+	Mem_Copy(buffer, msg, len);
+	buffer[len + 0] = '\n';
+	buffer[len + 1] = '\0';
+	nocashWrite(buffer, len + 2);
+}
+
+extern void consolePrintString(const char* ptr, int len);
+void Platform_Log(const char* msg, int len) {
+    LogNocash(msg, len);
+	consolePrintString(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;
+}
+
+
+/*########################################################################################################################*
+*-----------------------------------------------------Directory/File------------------------------------------------------*
+*#########################################################################################################################*/
+static cc_string root_path = String_FromConst("fat:/"); // may be overriden in InitFilesystem
+static bool fat_available;
+
+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) {
+	if (!fat_available) return 0;
+
+	char str[NATIVE_STR_LEN];
+	GetNativePath(str, path);
+    Platform_Log1("mkdir %c", str);
+
+	return mkdir(str, 0) == -1 ? errno : 0;
+}
+
+int File_Exists(const cc_string* path) {
+	if (!fat_available) return false;
+	
+	char str[NATIVE_STR_LEN];
+	struct stat sb;
+	GetNativePath(str, path);
+    Platform_Log1("Check %c", str);
+
+	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;
+	int res;
+
+	String_EncodeUtf8(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);
+
+		/* ignore . and .. entry */
+		char* src = entry->d_name;
+		if (src[0] == '.' && src[1] == '\0') continue;
+		if (src[0] == '.' && src[1] == '.' && src[2] == '\0') continue;
+
+		int len = String_Length(src);
+		String_AppendUtf8(&path, src, len);
+
+		if (entry->d_type == DT_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, const char* type) {
+	char str[NATIVE_STR_LEN];
+	GetNativePath(str, path);
+	Platform_Log2("%c %c", type, str);
+
+	*file = open(str, mode, 0);
+	return *file == -1 ? errno : 0;
+}
+
+cc_result File_Open(cc_file* file, const cc_string* path) {
+	if (!fat_available) return ReturnCode_FileNotFound;
+	return File_Do(file, path, O_RDONLY, "Open");
+}
+
+cc_result File_Create(cc_file* file, const cc_string* path) {
+	if (!fat_available) return ENOTSUP;
+	return File_Do(file, path, O_RDWR | O_CREAT | O_TRUNC, "Create");
+}
+
+cc_result File_OpenOrCreate(cc_file* file, const cc_string* path) {
+	if (!fat_available) return ENOTSUP;
+	return File_Do(file, path, O_RDWR | O_CREAT, "Update");
+}
+
+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;
+}
+
+static int LoadFatFilesystem(void* arg) {
+	fat_available = fatInitDefault();
+	return 0;
+}
+
+static void InitFilesystem(void) {
+	cothread_t thread = cothread_create(LoadFatFilesystem, NULL, 0, 0);
+	// If running with DSi mode in melonDS and the internal SD card is enabled, then
+	//  fatInitDefault gets stuck in sdmmc_ReadSectors - because the fifoWaitValue32Async will never return
+	// (You can tell when this happens - "MMC: unknown CMD 17 00000000" is logged to console)
+	// However, since it does yield to cothreads, workaround this by running fatInitDefault on another thread
+	//  and then giving up if it takes too long.. not the most elegant solution, but it does work
+	if (thread == -1) {
+		LoadFatFilesystem(NULL);
+	} else {
+		for (int i = 0; i < 100; i++)
+		{
+			cothread_yield();
+			if (cothread_has_joined(thread)) break;
+			
+			swiDelay(2000);
+		}
+	}
+
+    char* dir = fatGetDefaultCwd();
+    if (dir) {
+		Platform_Log1("CWD: %c", dir);
+        root_path.buffer = dir;
+        root_path.length = String_Length(dir);
+    }
+	Platform_ReadonlyFilesystem = !fat_available;
+}
+
+
+/*########################################################################################################################*
+*--------------------------------------------------------Threading--------------------------------------------------------*
+*#########################################################################################################################*/
+// !!! NOTE: PSP uses cooperative multithreading (not preemptive multithreading) !!!
+void Thread_Sleep(cc_uint32 milliseconds) { 
+	swiDelay(8378 * milliseconds); // TODO probably wrong
+}
+
+void Thread_Run(void** handle, Thread_StartFunc func, int stackSize, const char* name) {
+	*handle = NULL;
+}
+
+void Thread_Detach(void* handle) {
+}
+
+void Thread_Join(void* handle) {
+}
+
+void* Mutex_Create(const char* name) {
+	return NULL;
+}
+
+void Mutex_Free(void* handle) {
+}
+
+void Mutex_Lock(void* handle) {
+}
+
+void Mutex_Unlock(void* handle) {
+}
+
+void* Waitable_Create(const char* name) {
+	return NULL;
+}
+
+void Waitable_Free(void* handle) {
+}
+
+void Waitable_Signal(void* handle) {
+}
+
+void Waitable_Wait(void* handle) {
+}
+
+void Waitable_WaitFor(void* handle, cc_uint32 milliseconds) {
+}
+
+
+/*########################################################################################################################*
+*---------------------------------------------------------Socket----------------------------------------------------------*
+*#########################################################################################################################*/
+static cc_bool net_supported = true;
+
+static cc_result ParseHost(const char* host, int port, cc_sockaddr* addrs, int* numValidAddrs) {
+	struct hostent* res = gethostbyname(host);
+	struct sockaddr_in* addr4;
+	char* src_addr;
+	int i;
+	
+	// avoid confusion with SSL error codes
+	// e.g. FFFF FFF7 > FF00 FFF7
+	if (!res) return -0xFF0000 + errno;
+	
+	// Must have at least one IPv4 address
+	if (res->h_addrtype != AF_INET) return ERR_INVALID_ARGUMENT;
+	if (!res->h_addr_list)          return ERR_INVALID_ARGUMENT;
+
+	for (i = 0; i < SOCKET_MAX_ADDRS; i++) 
+	{
+		src_addr = res->h_addr_list[i];
+		if (!src_addr) break;
+		addrs[i].size = sizeof(struct sockaddr_in);
+
+		addr4 = (struct sockaddr_in*)addrs[i].data;
+		addr4->sin_family = AF_INET;
+		addr4->sin_port   = htons(port);
+		addr4->sin_addr   = *(struct in_addr*)src_addr;
+	}
+
+	*numValidAddrs = i;
+	return i == 0 ? ERR_INVALID_ARGUMENT : 0;
+}
+
+cc_result Socket_ParseAddress(const cc_string* address, int port, cc_sockaddr* addrs, int* numValidAddrs) {
+	struct sockaddr_in* addr4 = (struct sockaddr_in*)addrs[0].data;
+	char str[NATIVE_STR_LEN];
+	String_EncodeUtf8(str, address);
+
+	if (!net_supported) return ERR_NOT_SUPPORTED;
+	*numValidAddrs = 1;
+
+	if (inet_aton(str, &addr4->sin_addr) > 0) {
+		addr4->sin_family = AF_INET;
+		addr4->sin_port   = htons(port);
+		
+		addrs[0].size = sizeof(*addr4);
+		return 0;
+	}
+	
+	return ParseHost(str, port, addrs, numValidAddrs);
+}
+
+cc_result Socket_Connect(cc_socket* s, cc_sockaddr* addr, cc_bool nonblocking) {
+	struct sockaddr* raw = (struct sockaddr*)addr->data;
+	int res;
+	if (!net_supported) { *s = -1; return ERR_NOT_SUPPORTED; }
+
+	*s = socket(raw->sa_family, SOCK_STREAM, 0);
+	if (*s < 0) return errno;
+
+	if (nonblocking) {
+		int blocking_raw = 1; /* non-blocking mode */
+		ioctl(*s, FIONBIO, &blocking_raw);
+	}
+
+	res = connect(*s, raw, addr->size);
+	return res < 0 ? errno : 0;
+}
+
+cc_result Socket_Read(cc_socket s, cc_uint8* data, cc_uint32 count, cc_uint32* modified) {
+	int res = recv(s, data, count, 0);
+	if (res < 0) { *modified = 0; return errno; }
+	
+	*modified = res; return 0;
+}
+
+cc_result Socket_Write(cc_socket s, const cc_uint8* data, cc_uint32 count, cc_uint32* modified) {
+	int res = send(s, data, count, 0);
+	if (res < 0) { *modified = 0; return errno; }
+	
+	*modified = res; return 0;
+}
+
+void Socket_Close(cc_socket s) {
+	shutdown(s, 2); // SHUT_RDWR = 2
+	closesocket(s);
+}
+
+// libogc only implements net_select for gamecube currently
+static cc_result Socket_Poll(cc_socket s, int mode, cc_bool* success) {
+	fd_set set;
+	struct timeval time = { 0 };
+	int res; // number of 'ready' sockets
+	FD_ZERO(&set);
+	FD_SET(s, &set);
+	if (mode == SOCKET_POLL_READ) {
+		res = select(s + 1, &set, NULL, NULL, &time);
+	} else {
+		res = select(s + 1, NULL, &set, NULL, &time);
+	}
+	if (res < 0) { *success = false; return errno; }
+	*success = FD_ISSET(s, &set) != 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) {
+	int resultSize = sizeof(int);
+	cc_result res  = Socket_Poll(s, SOCKET_POLL_WRITE, writable);
+	if (res || *writable) return res;
+	
+	/* https://stackoverflow.com/questions/29479953/so-error-value-after-successful-socket-operation */
+	getsockopt(s, SOL_SOCKET, SO_ERROR, &res, &resultSize);
+	return res;
+}
+
+static void InitNetworking(void) {
+    if (!Wifi_InitDefault(INIT_ONLY)) {
+        Platform_LogConst("Initing WIFI failed"); 
+		net_supported = false; return;
+    }
+    Wifi_AutoConnect();
+
+    for (int i = 0; i < 300; i++)
+    {
+        int status = Wifi_AssocStatus();
+        if (status == ASSOCSTATUS_ASSOCIATED) return;
+
+        if (status == ASSOCSTATUS_CANNOTCONNECT) {
+            Platform_LogConst("Can't connect to WIFI"); 
+			net_supported = false; return;
+        }
+        swiWaitForVBlank();
+    }
+    Platform_LogConst("Gave up after 300 tries");
+	net_supported = false;
+}
+
+
+/*########################################################################################################################*
+*--------------------------------------------------------Platform---------------------------------------------------------*
+*#########################################################################################################################*/
+void Platform_Init(void) {
+	cc_bool dsiMode = isDSiMode();
+	Platform_Log1("Running in %c mode", dsiMode ? "DSi" : "DS");
+
+	InitFilesystem();
+    InitNetworking();
+	cpuStartTiming(1);
+}
+void Platform_Free(void) { }
+
+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) {
+	return ERR_NOT_SUPPORTED;
+}
+#endif