start os.h merging

1 files changed, 128 insertions, 0 deletions

diff --git a/os-win.c b/os-win.c
new file mode 100644
index 0000000..df32cdf
--- /dev/null
+++ b/os-win.c
@@ -0,0 +1,128 @@
+#include "filesystem.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <io.h>
+#include <sysinfoapi.h>
+
+static FsType windows_file_attributes_to_type(DWORD attrs) {
+	if (attrs == INVALID_FILE_ATTRIBUTES)
+		return FS_NON_EXISTENT;
+	else if (attrs & FILE_ATTRIBUTE_DIRECTORY)
+		return FS_DIRECTORY;
+	else
+		return FS_FILE;
+}
+
+FsType fs_path_type(char const *path) {
+	WCHAR wide_path[4100];
+	if (MultiByteToWideChar(CP_UTF8, 0, path, -1, wide_path, sizeof wide_path) == 0) {
+		return FS_NON_EXISTENT;
+	}
+	return windows_file_attributes_to_type(GetFileAttributesW(wide_path));
+}
+
+FsPermission fs_path_permission(char const *path) {
+	FsPermission permission = 0;
+	if (_access(path, 04) == 0) permission |= FS_PERMISSION_READ;
+	if (_access(path, 02) == 0) permission |= FS_PERMISSION_WRITE;
+	return permission;
+}
+
+bool fs_file_exists(char const *path) {
+	return fs_path_type(path) == FS_FILE;
+}
+
+FsDirectoryEntry **fs_list_directory(char const *dirname) {
+	char file_pattern[1000] = {0};
+	FsDirectoryEntry **files = NULL;
+	WIN32_FIND_DATAW find_data;
+	HANDLE fhandle;
+	assert(*dirname);
+	sprintf_s(file_pattern, sizeof file_pattern, "%s%s*", dirname,
+		dirname[strlen(dirname) - 1] == PATH_SEPARATOR ? "" : PATH_SEPARATOR_STR);
+	wchar_t wide_pattern[1024] = {0};
+	MultiByteToWideChar(CP_UTF8, 0, file_pattern, -1, wide_pattern, sizeof wide_pattern - 1);
+	
+	fhandle = FindFirstFileW(wide_pattern, &find_data);
+	if (fhandle != INVALID_HANDLE_VALUE) {
+		// first, figure out number of files
+		int nfiles = 1, idx = 0;
+		while (FindNextFileW(fhandle, &find_data))  {
+			++nfiles;
+		}
+		FindClose(fhandle);
+		// now, fill out files array
+		files = calloc(nfiles + 1, sizeof *files);
+		if (files) {
+			fhandle = FindFirstFileW(wide_pattern, &find_data);
+			if (fhandle != INVALID_HANDLE_VALUE) {
+				do {
+					if (idx < nfiles) {
+						LPWSTR wide_filename = find_data.cFileName;
+						size_t wide_len = wcslen(wide_filename);
+						size_t cap = 4 * wide_len + 4;
+						FsDirectoryEntry *entry = calloc(1, sizeof *entry + cap);
+						
+						
+						if (entry) {
+							if (WideCharToMultiByte(CP_UTF8, 0, wide_filename, (int)wide_len, entry->name, (int)cap - 1, NULL, NULL) == 0)
+								break;
+							DWORD attrs = find_data.dwFileAttributes;
+							entry->type = windows_file_attributes_to_type(attrs);
+							files[idx++] = entry;
+						} else break; // stop now
+					}
+				} while (FindNextFileW(fhandle, &find_data));
+				FindClose(fhandle);
+			}
+		}
+	}
+	return files;
+}
+
+int fs_mkdir(char const *path) {
+	WCHAR wide_path[4100];
+	if (MultiByteToWideChar(CP_UTF8, 0, path, -1, wide_path, sizeof wide_path) == 0)
+		return -1;
+	
+	if (CreateDirectoryW(wide_path, NULL)) {
+		// directory created successfully
+		return 1;
+	} else {
+		if (GetLastError() == ERROR_ALREADY_EXISTS) // directory already exists
+			return 0;
+		else
+			return -1; // some other error
+	}
+}
+
+int fs_get_cwd(char *buf, size_t buflen) {
+	assert(buf && buflen);
+	wchar_t wide_path[4100];
+	DWORD wide_pathlen = GetCurrentDirectoryW(sizeof wide_path - 1, wide_path);
+	if (wide_pathlen == 0) return -1;
+	if (WideCharToMultiByte(CP_UTF8, 0, wide_path, (int)wide_pathlen, buf, (int)buflen, NULL, NULL) == 0)
+		return 0;
+	return 1;
+}
+
+struct timespec time_last_modified(char const *filename) {
+	// windows' _stat does not have st_mtim
+	struct _stat statbuf = {0};
+	struct timespec ts = {0};
+	_stat(filename, &statbuf);
+	ts.tv_sec = statbuf.st_mtime;
+	return ts;
+}
+
+
+struct timespec time_get(void) {
+	struct timespec ts = {0};
+	timespec_get(&ts, TIME_UTC);
+	return ts;
+}
+
+void time_sleep_ns(u64 ns) {
+	// windows....
+	Sleep((DWORD)(ns / 1000000));
+}