Initial Commit - Copy from Altus Metrum AltOS

icon/windows-stub.c

@@ -0,0 +1,202 @@
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+/* A windows stub program to launch a java program with suitable parameters
+ *
+ * Given that the name of this exe is altusmetrum-foo.exe living in directory bar, and
+ * that it was run with 'args' extra command line parameters, run:
+ *
+ *	javaw.exe -Djava.library.path="bar" -jar "bar/foo-fat.jar" args
+ */
+
+#define _UNICODE
+#define UNICODE
+#include <stdlib.h>
+#include <windows.h>
+#include <setupapi.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <shlwapi.h>
+
+/* Concatenate a list of strings together
+ */
+static LPTSTR
+wcsbuild(LPTSTR first, ...)
+{
+	va_list	args;
+	int	len;
+	LPTSTR	buf;
+	LPTSTR	arg;
+
+	buf = wcsdup(first);
+	va_start(args, first);
+	while ((arg = va_arg(args, LPTSTR)) != NULL) {
+		len = wcslen(buf) + wcslen(arg) + 1;
+		buf = realloc(buf, len * sizeof (wchar_t));
+		wcscat(buf, arg);
+	}
+	va_end(args);
+	return buf;
+}
+
+/* Quote a single string, taking care to escape embedded quote and
+ * backslashes within
+ */
+static LPTSTR
+quote_arg(LPTSTR arg)
+{
+	LPTSTR	result;
+	LPTSTR	in, out;
+	int	out_len = 3;	/* quotes and terminating null */
+
+	/* Find quote and backslashes */
+	for (in = arg; *in; in++) {
+		switch (*in) {
+		case '"':
+		case '\\':
+			out_len += 2;
+			break;
+		default:
+			out_len++;
+			break;
+		}
+	}
+
+	result = malloc ((out_len + 1) * sizeof (wchar_t));
+	out = result;
+	*out++ = '"';
+	for (in = arg; *in; in++) {
+		switch (*in) {
+		case '"':
+		case '\\':
+			*out++ = '\\';
+			break;
+		}
+		*out++ = *in;
+	}
+	*out++ = '"';
+	*out++ = '\0';
+	return result;
+}
+
+/* Construct a single string from a list of arguments
+ */
+static LPTSTR
+quote_args(LPTSTR *argv, int argc)
+{
+	LPTSTR	result = NULL, arg;
+	int	i;
+
+	result = malloc(1 * sizeof (wchar_t));
+	result[0] = '\0';
+	for (i = 0; i < argc; i++) {
+		arg = quote_arg(argv[i]);
+		result = realloc(result, (wcslen(result) + 1 + wcslen(arg) + 1) * sizeof (wchar_t));
+		wcscat(result, L" ");
+		wcscat(result, arg);
+		free(arg);
+	}
+	return result;
+}
+
+/* Return the directory portion of the provided file
+ */
+static LPTSTR
+get_dir(LPTSTR file)
+{
+	DWORD	len = GetFullPathName(file, 0, NULL, NULL);
+	LPTSTR	full = malloc (len * sizeof (wchar_t));
+	GetFullPathName(file, len, full, NULL);
+	PathRemoveFileSpec(full);
+	return full;
+}
+
+/* Convert a .exe name into a -fat.jar name, starting
+ * by computing the complete path name of the source filename
+ */
+static LPTSTR
+make_jar(LPTSTR file)
+{
+	DWORD	len = GetFullPathName(file, 0, NULL, NULL);
+	LPTSTR	full = malloc (len * sizeof (wchar_t));
+	LPTSTR	base_part;
+	LPTSTR	jar;
+	LPTSTR	dot;
+	GetFullPathName(file, len, full, &base_part);
+	static const wchar_t head[] = L"altusmetrum-";
+
+	if (wcsncmp(base_part, head, wcslen(head)) == 0)
+		base_part += wcslen(head);
+	dot = wcsrchr(base_part, '.');
+	if (dot)
+		*dot = '\0';
+	jar = wcsdup(base_part);
+	PathRemoveFileSpec(full);
+	return wcsbuild(full, L"\\", jar, L"-fat.jar", NULL);
+}
+
+/* Build the complete command line from the pieces
+ */
+static LPTSTR
+make_cmd(LPTSTR dir, LPTSTR jar, LPTSTR quote_args)
+{
+	LPTSTR	quote_dir = quote_arg(dir);
+	LPTSTR	quote_jar = quote_arg(jar);
+	LPTSTR	cmd;
+
+	cmd = wcsbuild(L"javaw.exe -Djava.library.path=", quote_dir, L" -jar ", quote_jar, quote_args, NULL);
+	free(quote_jar);
+	free(jar);
+	free(quote_dir);
+	return cmd;
+}
+
+int WINAPI
+WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmd_line_a, int cmd_show)
+{
+	STARTUPINFO		startup_info;
+	PROCESS_INFORMATION	process_information;
+	BOOL			result;
+	wchar_t			*command_line;
+	int			argc;
+	LPTSTR			*argv = CommandLineToArgvW(GetCommandLine(), &argc);
+	LPTSTR			my_dir;
+	LPTSTR			my_jar;
+	LPTSTR			args = quote_args(argv + 1, argc - 1);
+
+	my_dir = get_dir(argv[0]);
+	my_jar = make_jar(argv[0]);
+	command_line = make_cmd(my_dir, my_jar, args);
+	memset(&startup_info, '\0', sizeof startup_info);
+	startup_info.cb = sizeof startup_info;
+	result = CreateProcess(NULL,
+			       command_line,
+			       NULL,
+			       NULL,
+			       FALSE,
+			       CREATE_NO_WINDOW,
+			       NULL,
+			       NULL,
+			       &startup_info,
+			       &process_information);
+	if (result) {
+		CloseHandle(process_information.hProcess);
+		CloseHandle(process_information.hThread);
+	}
+	exit(0);
+}