mirror of
https://git.tartarus.org/simon/putty.git
synced 2025-07-02 03:52:49 -05:00
Now that we have Subversion's file renaming ability, it's time at
long last to move all the Windows-specific source files down into a `windows' subdirectory. Only platform-specific files remain at the top level. With any luck this will act as a hint to anyone still contemplating sending us a Windows-centric patch... [originally from svn r4792]
This commit is contained in:
Simon Tatham
366
windows/winmisc.c
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366
windows/winmisc.c
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@ -0,0 +1,366 @@
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/*
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* winmisc.c: miscellaneous Windows-specific things
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "putty.h"
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OSVERSIONINFO osVersion;
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void platform_get_x11_auth(char *display, int *proto,
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unsigned char *data, int *datalen)
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{
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/* We don't support this at all under Windows. */
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}
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const char platform_x11_best_transport[] = "localhost";
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char *platform_get_x_display(void) {
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/* We may as well check for DISPLAY in case it's useful. */
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return dupstr(getenv("DISPLAY"));
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}
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Filename filename_from_str(const char *str)
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{
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Filename ret;
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strncpy(ret.path, str, sizeof(ret.path));
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ret.path[sizeof(ret.path)-1] = '\0';
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return ret;
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}
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const char *filename_to_str(const Filename *fn)
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{
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return fn->path;
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}
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int filename_equal(Filename f1, Filename f2)
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{
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return !strcmp(f1.path, f2.path);
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}
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int filename_is_null(Filename fn)
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{
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return !*fn.path;
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}
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char *get_username(void)
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{
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DWORD namelen;
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char *user;
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namelen = 0;
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if (GetUserName(NULL, &namelen) == FALSE)
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return NULL;
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user = snewn(namelen, char);
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GetUserName(user, &namelen);
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return user;
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}
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int SaneDialogBox(HINSTANCE hinst,
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LPCTSTR tmpl,
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HWND hwndparent,
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DLGPROC lpDialogFunc)
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{
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WNDCLASS wc;
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HWND hwnd;
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MSG msg;
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int flags;
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int ret;
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int gm;
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wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
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wc.lpfnWndProc = DefDlgProc;
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wc.cbClsExtra = 0;
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wc.cbWndExtra = DLGWINDOWEXTRA + 8;
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wc.hInstance = hinst;
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wc.hIcon = NULL;
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wc.hCursor = LoadCursor(NULL, IDC_ARROW);
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wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
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wc.lpszMenuName = NULL;
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wc.lpszClassName = "PuTTYConfigBox";
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RegisterClass(&wc);
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hwnd = CreateDialog(hinst, tmpl, hwndparent, lpDialogFunc);
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SetWindowLong(hwnd, BOXFLAGS, 0); /* flags */
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SetWindowLong(hwnd, BOXRESULT, 0); /* result from SaneEndDialog */
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while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
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flags=GetWindowLong(hwnd, BOXFLAGS);
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if (!(flags & DF_END) && !IsDialogMessage(hwnd, &msg))
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DispatchMessage(&msg);
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if (flags & DF_END)
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break;
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}
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if (gm == 0)
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PostQuitMessage(msg.wParam); /* We got a WM_QUIT, pass it on */
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ret=GetWindowLong(hwnd, BOXRESULT);
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DestroyWindow(hwnd);
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return ret;
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}
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void SaneEndDialog(HWND hwnd, int ret)
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{
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SetWindowLong(hwnd, BOXRESULT, ret);
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SetWindowLong(hwnd, BOXFLAGS, DF_END);
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}
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BOOL init_winver(void)
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{
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ZeroMemory(&osVersion, sizeof(osVersion));
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osVersion.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
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return GetVersionEx ( (OSVERSIONINFO *) &osVersion);
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}
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#ifdef DEBUG
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static FILE *debug_fp = NULL;
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static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
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static int debug_got_console = 0;
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void dputs(char *buf)
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{
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DWORD dw;
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if (!debug_got_console) {
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if (AllocConsole()) {
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debug_got_console = 1;
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debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
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}
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}
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if (!debug_fp) {
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debug_fp = fopen("debug.log", "w");
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}
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if (debug_hdl != INVALID_HANDLE_VALUE) {
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WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL);
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}
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fputs(buf, debug_fp);
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fflush(debug_fp);
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}
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#endif
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#ifdef MINEFIELD
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/*
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* Minefield - a Windows equivalent for Electric Fence
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*/
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#define PAGESIZE 4096
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/*
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* Design:
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*
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* We start by reserving as much virtual address space as Windows
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* will sensibly (or not sensibly) let us have. We flag it all as
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* invalid memory.
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*
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* Any allocation attempt is satisfied by committing one or more
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* pages, with an uncommitted page on either side. The returned
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* memory region is jammed up against the _end_ of the pages.
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*
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* Freeing anything causes instantaneous decommitment of the pages
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* involved, so stale pointers are caught as soon as possible.
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*/
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static int minefield_initialised = 0;
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static void *minefield_region = NULL;
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static long minefield_size = 0;
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static long minefield_npages = 0;
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static long minefield_curpos = 0;
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static unsigned short *minefield_admin = NULL;
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static void *minefield_pages = NULL;
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static void minefield_admin_hide(int hide)
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{
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int access = hide ? PAGE_NOACCESS : PAGE_READWRITE;
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VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL);
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}
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static void minefield_init(void)
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{
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int size;
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int admin_size;
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int i;
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for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) {
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minefield_region = VirtualAlloc(NULL, size,
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MEM_RESERVE, PAGE_NOACCESS);
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if (minefield_region)
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break;
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}
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minefield_size = size;
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/*
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* Firstly, allocate a section of that to be the admin block.
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* We'll need a two-byte field for each page.
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*/
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minefield_admin = minefield_region;
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minefield_npages = minefield_size / PAGESIZE;
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admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1);
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minefield_npages = (minefield_size - admin_size) / PAGESIZE;
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minefield_pages = (char *) minefield_region + admin_size;
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/*
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* Commit the admin region.
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*/
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VirtualAlloc(minefield_admin, minefield_npages * 2,
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MEM_COMMIT, PAGE_READWRITE);
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/*
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* Mark all pages as unused (0xFFFF).
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*/
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for (i = 0; i < minefield_npages; i++)
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minefield_admin[i] = 0xFFFF;
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/*
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* Hide the admin region.
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*/
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minefield_admin_hide(1);
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minefield_initialised = 1;
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}
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static void minefield_bomb(void)
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{
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div(1, *(int *) minefield_pages);
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}
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static void *minefield_alloc(int size)
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{
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int npages;
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int pos, lim, region_end, region_start;
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int start;
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int i;
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npages = (size + PAGESIZE - 1) / PAGESIZE;
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minefield_admin_hide(0);
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/*
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* Search from current position until we find a contiguous
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* bunch of npages+2 unused pages.
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*/
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pos = minefield_curpos;
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lim = minefield_npages;
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while (1) {
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/* Skip over used pages. */
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while (pos < lim && minefield_admin[pos] != 0xFFFF)
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pos++;
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/* Count unused pages. */
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start = pos;
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while (pos < lim && pos - start < npages + 2 &&
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minefield_admin[pos] == 0xFFFF)
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pos++;
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if (pos - start == npages + 2)
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break;
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/* If we've reached the limit, reset the limit or stop. */
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if (pos >= lim) {
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if (lim == minefield_npages) {
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/* go round and start again at zero */
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lim = minefield_curpos;
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pos = 0;
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} else {
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minefield_admin_hide(1);
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return NULL;
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}
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}
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}
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minefield_curpos = pos - 1;
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/*
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* We have npages+2 unused pages starting at start. We leave
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* the first and last of these alone and use the rest.
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*/
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region_end = (start + npages + 1) * PAGESIZE;
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region_start = region_end - size;
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/* FIXME: could align here if we wanted */
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/*
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* Update the admin region.
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*/
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for (i = start + 2; i < start + npages + 1; i++)
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minefield_admin[i] = 0xFFFE; /* used but no region starts here */
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minefield_admin[start + 1] = region_start % PAGESIZE;
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minefield_admin_hide(1);
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VirtualAlloc((char *) minefield_pages + region_start, size,
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MEM_COMMIT, PAGE_READWRITE);
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return (char *) minefield_pages + region_start;
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}
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static void minefield_free(void *ptr)
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{
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int region_start, i, j;
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minefield_admin_hide(0);
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region_start = (char *) ptr - (char *) minefield_pages;
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i = region_start / PAGESIZE;
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if (i < 0 || i >= minefield_npages ||
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minefield_admin[i] != region_start % PAGESIZE)
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minefield_bomb();
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for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) {
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minefield_admin[j] = 0xFFFF;
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}
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VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT);
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minefield_admin_hide(1);
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}
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static int minefield_get_size(void *ptr)
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{
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int region_start, i, j;
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minefield_admin_hide(0);
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region_start = (char *) ptr - (char *) minefield_pages;
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i = region_start / PAGESIZE;
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if (i < 0 || i >= minefield_npages ||
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minefield_admin[i] != region_start % PAGESIZE)
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minefield_bomb();
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for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++);
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minefield_admin_hide(1);
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return j * PAGESIZE - region_start;
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}
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void *minefield_c_malloc(size_t size)
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{
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if (!minefield_initialised)
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minefield_init();
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return minefield_alloc(size);
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}
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void minefield_c_free(void *p)
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{
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if (!minefield_initialised)
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minefield_init();
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minefield_free(p);
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}
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/*
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* realloc _always_ moves the chunk, for rapid detection of code
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* that assumes it won't.
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*/
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void *minefield_c_realloc(void *p, size_t size)
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{
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size_t oldsize;
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void *q;
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if (!minefield_initialised)
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minefield_init();
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q = minefield_alloc(size);
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oldsize = minefield_get_size(p);
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memcpy(q, p, (oldsize < size ? oldsize : size));
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minefield_free(p);
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return q;
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}
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#endif /* MINEFIELD */
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