src/win32/win32dep.c

/*
 * gaim
 *
 * File: win32dep.c
 * Date: June, 2002
 * Description: Windows dependant code for Gaim
 *
 * Copyright (C) 2002-2003, Herman Bloggs <hermanator12002@yahoo.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
 *
 */
#define _WIN32_IE 0x500
#include <windows.h>
#include <io.h>
#include <stdlib.h>
#include <stdio.h>
#include <winuser.h>

#include <glib.h>
#include <glib/gstdio.h>

#include "gaim.h"
#include "debug.h"
#include "notify.h"

#include "resource.h"
#include "idletrack.h"
#include "zlib.h"
#include "untar.h"

#include <libintl.h>

#include "win32dep.h"

/*
 *  DEFINES & MACROS
 */
#define _(x) gettext(x)

/*
 * DATA STRUCTS
 */

/* For shfolder.dll */
typedef HRESULT (CALLBACK* LPFNSHGETFOLDERPATHA)(HWND, int, HANDLE, DWORD, LPSTR);
typedef HRESULT (CALLBACK* LPFNSHGETFOLDERPATHW)(HWND, int, HANDLE, DWORD, LPWSTR);

/*
 * LOCALS
 */
static char *app_data_dir, *install_dir, *lib_dir, *locale_dir;

/*
 *  GLOBALS
 */
HINSTANCE gaimexe_hInstance = 0;
HINSTANCE gaimdll_hInstance = 0;

/*
 *  PROTOS
 */

FARPROC wgaim_find_and_loadproc(char*, char*);
extern void wgaim_gtkspell_init();
char* wgaim_data_dir(void);

/*
 *  STATIC CODE
 */

static void wgaim_debug_print(GaimDebugLevel level, const char *category, const char *format, va_list args) {
	char *str = NULL;
	if (args != NULL) {
		str = g_strdup_vprintf(format, args);
	} else {
		str = g_strdup(format);
	}
	printf("%s%s%s", category ? category : "", category ? ": " : "", str);
	g_free(str);
}

static GaimDebugUiOps ops = {
	wgaim_debug_print
};

/*
 *  PUBLIC CODE
 */

HINSTANCE wgaim_hinstance(void) {
	return gaimexe_hInstance;
}

/* Escape windows dir separators.  This is needed when paths are saved,
   and on being read back have their '\' chars used as an escape char.
   Returns an allocated string which needs to be freed.
*/
char* wgaim_escape_dirsep(char* filename) {
	int sepcount = 0;
	char* ret = NULL;
	int cnt = 0;

	ret = filename;
	while(*ret) {
		if(*ret == '\\')
			sepcount++;
		ret++;
	}
	ret = g_malloc0(strlen(filename) + sepcount + 1);
	while(*filename) {
		ret[cnt] = *filename;
		if(*filename == '\\')
			ret[++cnt] = '\\';
		filename++;
		cnt++;
	}
	ret[cnt] = '\0';
	return ret;
}

/* Determine whether the specified dll contains the specified procedure.
   If so, load it (if not already loaded). */
FARPROC wgaim_find_and_loadproc(char* dllname, char* procedure) {
	HMODULE hmod;
	BOOL did_load = FALSE;
	FARPROC proc = 0;

	if(!(hmod = GetModuleHandle(dllname))) {
		gaim_debug(GAIM_DEBUG_WARNING, "wgaim", "%s not found. Loading it..\n", dllname);
		if(!(hmod = LoadLibrary(dllname))) {
			gaim_debug(GAIM_DEBUG_ERROR, "wgaim", "Could not load: %s\n", dllname);
			return NULL;
		}
		else
			did_load = TRUE;
	}

	if((proc = GetProcAddress(hmod, procedure))) {
		gaim_debug(GAIM_DEBUG_INFO, "wgaim", "This version of %s contains %s\n",
			dllname, procedure);
		return proc;
	}
	else {
		gaim_debug(GAIM_DEBUG_WARNING, "wgaim", "Function %s not found in dll %s\n",
			procedure, dllname);
		if(did_load) {
			/* unload dll */
			FreeLibrary(hmod);
		}
		return NULL;
	}
}

/* Determine Gaim Paths during Runtime */

/* Get paths to special Windows folders. */
char *wgaim_get_special_folder(int folder_type) {
	static LPFNSHGETFOLDERPATHA MySHGetFolderPathA = NULL;
	char *retval = NULL;
#if GLIB_CHECK_VERSION(2,6,0)
	static LPFNSHGETFOLDERPATHW MySHGetFolderPathW = NULL;

	if (!MySHGetFolderPathW) {
		MySHGetFolderPathW = (LPFNSHGETFOLDERPATHW)
			wgaim_find_and_loadproc("shfolder.dll", "SHGetFolderPathW");
	}

	if (MySHGetFolderPathW) {
		wchar_t utf_16_dir[MAX_PATH + 1];

		if (SUCCEEDED(MySHGetFolderPathW(NULL, folder_type, NULL,
						SHGFP_TYPE_CURRENT, utf_16_dir))) {
			retval = g_utf16_to_utf8(utf_16_dir, -1, NULL, NULL, NULL);
		}
	}
#endif

	if (!retval) {
		if (!MySHGetFolderPathA) {
			MySHGetFolderPathA = (LPFNSHGETFOLDERPATHA)
				wgaim_find_and_loadproc("shfolder.dll", "SHGetFolderPathA");
		}
		if (MySHGetFolderPathA) {
			char locale_dir[MAX_PATH + 1];

			if (SUCCEEDED(MySHGetFolderPathA(NULL, folder_type, NULL,
							SHGFP_TYPE_CURRENT, locale_dir))) {
#if GLIB_CHECK_VERSION(2,6,0)
				retval = g_locale_to_utf8(locale_dir, -1, NULL, NULL, NULL);
#else
				retval = g_strdup(locale_dir);
#endif
			}
		}
	}

	return retval;
}

char* wgaim_install_dir(void) {
	static gboolean initialized = FALSE;

	if (!initialized) {
		char *tmp = NULL;
		if (G_WIN32_HAVE_WIDECHAR_API()) {
			wchar_t winstall_dir[MAXPATHLEN];
			if (GetModuleFileNameW(NULL, winstall_dir,
					MAXPATHLEN) > 0) {
				tmp = g_utf16_to_utf8(winstall_dir, -1,
					NULL, NULL, NULL);
			}
		} else {
			gchar cpinstall_dir[MAXPATHLEN];
			if (GetModuleFileNameA(NULL, cpinstall_dir,
					MAXPATHLEN) > 0) {
				tmp = g_locale_to_utf8(cpinstall_dir,
					-1, NULL, NULL, NULL);
			}
		}

		if (tmp == NULL) {
			tmp = g_win32_error_message(GetLastError());
			gaim_debug(GAIM_DEBUG_ERROR, "wgaim",
				"GetModuleFileName error: %s\n", tmp);
			g_free(tmp);
			return NULL;
		} else {
			install_dir = g_path_get_dirname(tmp);
			g_free(tmp);
			initialized = TRUE;
		}
	}

	return install_dir;
}

char* wgaim_lib_dir(void) {
	static gboolean initialized = FALSE;

	if (!initialized) {
		char *inst_dir = wgaim_install_dir();
		if (inst_dir != NULL) {
			lib_dir = g_strdup_printf("%s" G_DIR_SEPARATOR_S "plugins", inst_dir);
			initialized = TRUE;
		} else {
			return NULL;
		}
	}

	return lib_dir;
}

char* wgaim_locale_dir(void) {
	static gboolean initialized = FALSE;

	if (!initialized) {
		char *inst_dir = wgaim_install_dir();
		if (inst_dir != NULL) {
			locale_dir = g_strdup_printf("%s" G_DIR_SEPARATOR_S "locale", inst_dir);
			initialized = TRUE;
		} else {
			return NULL;
		}
	}

	return locale_dir;
}

char* wgaim_data_dir(void) {
	return app_data_dir;
}

/* Miscellaneous */

gboolean wgaim_read_reg_string(HKEY key, char* sub_key, char* val_name, LPBYTE data, LPDWORD data_len) {
	HKEY hkey;
	gboolean ret = FALSE;

	if(ERROR_SUCCESS == RegOpenKeyEx(key, sub_key, 0,  KEY_QUERY_VALUE,
			&hkey)) {
		if(ERROR_SUCCESS == RegQueryValueEx(hkey, val_name, 0, NULL,
				data, data_len))
			ret = TRUE;
		RegCloseKey(key);
	}
	return ret;
}

int wgaim_gz_decompress(const char* in, const char* out) {
	gzFile fin;
	FILE *fout;
	char buf[1024];
	int ret;

	if((fin = gzopen(in, "rb"))) {
		if(!(fout = g_fopen(out, "wb"))) {
			gaim_debug(GAIM_DEBUG_ERROR, "wgaim_gz_decompress", "Error opening file: %s\n", out);
			gzclose(fin);
			return 0;
		}
	}
	else {
		gaim_debug(GAIM_DEBUG_ERROR, "wgaim_gz_decompress", "gzopen failed to open: %s\n", in);
		return 0;
	}

	while((ret = gzread(fin, buf, 1024))) {
		if(fwrite(buf, 1, ret, fout) < ret) {
			gaim_debug(GAIM_DEBUG_ERROR, "wgaim_gz_decompress", "Error writing %d bytes to file\n", ret);
			gzclose(fin);
			fclose(fout);
			return 0;
		}
	}
	fclose(fout);
	gzclose(fin);

	if(ret < 0) {
		gaim_debug(GAIM_DEBUG_ERROR, "wgaim_gz_decompress", "gzread failed while reading: %s\n", in);
		return 0;
	}

	return 1;
}

int wgaim_gz_untar(const char* filename, const char* destdir) {
	char tmpfile[_MAX_PATH];
	char template[]="wgaimXXXXXX";

	sprintf(tmpfile, "%s%s%s", g_get_tmp_dir(), G_DIR_SEPARATOR_S, _mktemp(template));
	if(wgaim_gz_decompress(filename, tmpfile)) {
		int ret;
		if(untar(tmpfile, destdir, UNTAR_FORCE | UNTAR_QUIET))
			ret = 1;
		else {
			gaim_debug(GAIM_DEBUG_ERROR, "wgaim_gz_untar", "Failure untaring %s\n", tmpfile);
			ret = 0;
		}
		g_unlink(tmpfile);
		return ret;
	}
	else {
		gaim_debug(GAIM_DEBUG_ERROR, "wgaim_gz_untar", "Failed to gz decompress %s\n", filename);
		return 0;
	}
}

void wgaim_notify_uri(const char *uri) {
	SHELLEXECUTEINFO sinfo;

	memset(&sinfo, 0, sizeof(sinfo));
	sinfo.cbSize = sizeof(sinfo);
	sinfo.fMask = SEE_MASK_CLASSNAME;
	sinfo.lpVerb = "open";
	sinfo.lpFile = uri;
	sinfo.nShow = SW_SHOWNORMAL;
	sinfo.lpClass = "http";

	/* We'll allow whatever URI schemes are supported by the
	   default http browser.
	*/
	if(!ShellExecuteEx(&sinfo))
		gaim_debug_error("wgaim", "Error opening URI: %s error: %d\n",
			uri, (int) sinfo.hInstApp);
}

void wgaim_init(HINSTANCE hint) {
	WORD wVersionRequested;
	WSADATA wsaData;
	const char *perlenv;
	char *newenv;

	gaim_debug_set_ui_ops(&ops);
	gaim_debug_info("wgaim", "wgaim_init start\n");

	gaim_debug_info("wgaim", "Glib:%u.%u.%u\n",
		glib_major_version, glib_minor_version, glib_micro_version);

	gaimexe_hInstance = hint;

	/* Winsock init */
	wVersionRequested = MAKEWORD(2, 2);
	WSAStartup(wVersionRequested, &wsaData);

	/* Confirm that the winsock DLL supports 2.2 */
	/* Note that if the DLL supports versions greater than
	   2.2 in addition to 2.2, it will still return 2.2 in
	   wVersion since that is the version we requested. */
	if(LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
		gaim_debug(GAIM_DEBUG_WARNING, "wgaim", "Could not find a usable WinSock DLL.  Oh well.\n");
		WSACleanup();
	}

	/* Set Environmental Variables */
	/* Tell perl where to find Gaim's perl modules */
	perlenv = g_getenv("PERL5LIB");
	newenv = g_strdup_printf("PERL5LIB=%s%s%s%s",
		perlenv ? perlenv : "",
		perlenv ? ";" : "",
		wgaim_install_dir(),
		"\\perlmod;");
	if (putenv(newenv) < 0)
		gaim_debug(GAIM_DEBUG_WARNING, "wgaim", "putenv failed\n");
	g_free(newenv);

	/* Set app data dir, used by gaim_home_dir */
	newenv = (char*) g_getenv("GAIMHOME");
	if (newenv) {
		app_data_dir = g_strdup(newenv);
	} else {
		app_data_dir = wgaim_get_special_folder(CSIDL_APPDATA);
		if (!app_data_dir) {
			app_data_dir = g_strdup("C:");
		}
	}

	gaim_debug(GAIM_DEBUG_INFO, "wgaim", "Gaim settings dir: %s\n", app_data_dir);

	/* IdleTracker Initialization */
	if(!wgaim_set_idlehooks())
			gaim_debug(GAIM_DEBUG_ERROR, "wgaim", "Failed to initialize idle tracker\n");

	gaim_debug(GAIM_DEBUG_INFO, "wgaim", "wgaim_init end\n");
}

/* Windows Cleanup */

void wgaim_cleanup(void) {
	gaim_debug(GAIM_DEBUG_INFO, "wgaim", "wgaim_cleanup\n");

	/* winsock cleanup */
	WSACleanup();

	/* Idle tracker cleanup */
	wgaim_remove_idlehooks();

	g_free(app_data_dir);
}

/* DLL initializer */
BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved ) {
	gaimdll_hInstance = hinstDLL;
	return TRUE;
}