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![Junio C Hamano](/assets/img/avatar_default.png)
A hotfix for a topic already in 'master'. * js/mingw-isatty: mingw: make stderr unbuffered again
637 lines
16 KiB
C
637 lines
16 KiB
C
/*
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* Copyright 2008 Peter Harris <git@peter.is-a-geek.org>
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*/
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#undef NOGDI
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#include "../git-compat-util.h"
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#include <wingdi.h>
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#include <winreg.h>
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#include "win32.h"
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static int fd_is_interactive[3] = { 0, 0, 0 };
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#define FD_CONSOLE 0x1
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#define FD_SWAPPED 0x2
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#define FD_MSYS 0x4
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/*
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ANSI codes used by git: m, K
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This file is git-specific. Therefore, this file does not attempt
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to implement any codes that are not used by git.
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*/
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static HANDLE console;
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static WORD plain_attr;
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static WORD attr;
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static int negative;
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static int non_ascii_used = 0;
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static HANDLE hthread, hread, hwrite;
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static HANDLE hconsole1, hconsole2;
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#ifdef __MINGW32__
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#if !defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 5
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typedef struct _CONSOLE_FONT_INFOEX {
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ULONG cbSize;
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DWORD nFont;
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COORD dwFontSize;
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UINT FontFamily;
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UINT FontWeight;
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WCHAR FaceName[LF_FACESIZE];
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} CONSOLE_FONT_INFOEX, *PCONSOLE_FONT_INFOEX;
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#endif
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#endif
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typedef BOOL (WINAPI *PGETCURRENTCONSOLEFONTEX)(HANDLE, BOOL,
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PCONSOLE_FONT_INFOEX);
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static void warn_if_raster_font(void)
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{
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DWORD fontFamily = 0;
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PGETCURRENTCONSOLEFONTEX pGetCurrentConsoleFontEx;
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/* don't bother if output was ascii only */
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if (!non_ascii_used)
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return;
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/* GetCurrentConsoleFontEx is available since Vista */
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pGetCurrentConsoleFontEx = (PGETCURRENTCONSOLEFONTEX) GetProcAddress(
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GetModuleHandle("kernel32.dll"),
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"GetCurrentConsoleFontEx");
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if (pGetCurrentConsoleFontEx) {
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CONSOLE_FONT_INFOEX cfi;
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cfi.cbSize = sizeof(cfi);
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if (pGetCurrentConsoleFontEx(console, 0, &cfi))
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fontFamily = cfi.FontFamily;
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} else {
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/* pre-Vista: check default console font in registry */
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HKEY hkey;
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if (ERROR_SUCCESS == RegOpenKeyExA(HKEY_CURRENT_USER, "Console",
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0, KEY_READ, &hkey)) {
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DWORD size = sizeof(fontFamily);
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RegQueryValueExA(hkey, "FontFamily", NULL, NULL,
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(LPVOID) &fontFamily, &size);
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RegCloseKey(hkey);
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}
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}
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if (!(fontFamily & TMPF_TRUETYPE)) {
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const wchar_t *msg = L"\nWarning: Your console font probably "
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L"doesn\'t support Unicode. If you experience strange "
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L"characters in the output, consider switching to a "
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L"TrueType font such as Consolas!\n";
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DWORD dummy;
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WriteConsoleW(console, msg, wcslen(msg), &dummy, NULL);
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}
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}
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static int is_console(int fd)
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{
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CONSOLE_SCREEN_BUFFER_INFO sbi;
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DWORD mode;
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HANDLE hcon;
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static int initialized = 0;
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/* get OS handle of the file descriptor */
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hcon = (HANDLE) _get_osfhandle(fd);
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if (hcon == INVALID_HANDLE_VALUE)
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return 0;
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/* check if its a device (i.e. console, printer, serial port) */
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if (GetFileType(hcon) != FILE_TYPE_CHAR)
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return 0;
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/* check if its a handle to a console output screen buffer */
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if (!fd) {
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if (!GetConsoleMode(hcon, &mode))
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return 0;
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} else if (!GetConsoleScreenBufferInfo(hcon, &sbi))
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return 0;
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if (fd >= 0 && fd <= 2)
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fd_is_interactive[fd] |= FD_CONSOLE;
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/* initialize attributes */
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if (!initialized) {
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console = hcon;
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attr = plain_attr = sbi.wAttributes;
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negative = 0;
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initialized = 1;
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}
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return 1;
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}
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#define BUFFER_SIZE 4096
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#define MAX_PARAMS 16
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static void write_console(unsigned char *str, size_t len)
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{
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/* only called from console_thread, so a static buffer will do */
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static wchar_t wbuf[2 * BUFFER_SIZE + 1];
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DWORD dummy;
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/* convert utf-8 to utf-16 */
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int wlen = xutftowcsn(wbuf, (char*) str, ARRAY_SIZE(wbuf), len);
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/* write directly to console */
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WriteConsoleW(console, wbuf, wlen, &dummy, NULL);
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/* remember if non-ascii characters are printed */
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if (wlen != len)
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non_ascii_used = 1;
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}
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#define FOREGROUND_ALL (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE)
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#define BACKGROUND_ALL (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE)
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static void set_console_attr(void)
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{
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WORD attributes = attr;
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if (negative) {
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attributes &= ~FOREGROUND_ALL;
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attributes &= ~BACKGROUND_ALL;
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/* This could probably use a bitmask
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instead of a series of ifs */
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if (attr & FOREGROUND_RED)
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attributes |= BACKGROUND_RED;
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if (attr & FOREGROUND_GREEN)
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attributes |= BACKGROUND_GREEN;
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if (attr & FOREGROUND_BLUE)
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attributes |= BACKGROUND_BLUE;
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if (attr & BACKGROUND_RED)
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attributes |= FOREGROUND_RED;
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if (attr & BACKGROUND_GREEN)
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attributes |= FOREGROUND_GREEN;
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if (attr & BACKGROUND_BLUE)
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attributes |= FOREGROUND_BLUE;
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}
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SetConsoleTextAttribute(console, attributes);
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}
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static void erase_in_line(void)
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{
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CONSOLE_SCREEN_BUFFER_INFO sbi;
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DWORD dummy; /* Needed for Windows 7 (or Vista) regression */
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if (!console)
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return;
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GetConsoleScreenBufferInfo(console, &sbi);
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FillConsoleOutputCharacterA(console, ' ',
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sbi.dwSize.X - sbi.dwCursorPosition.X, sbi.dwCursorPosition,
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&dummy);
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}
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static void set_attr(char func, const int *params, int paramlen)
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{
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int i;
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switch (func) {
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case 'm':
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for (i = 0; i < paramlen; i++) {
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switch (params[i]) {
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case 0: /* reset */
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attr = plain_attr;
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negative = 0;
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break;
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case 1: /* bold */
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attr |= FOREGROUND_INTENSITY;
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break;
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case 2: /* faint */
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case 22: /* normal */
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attr &= ~FOREGROUND_INTENSITY;
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break;
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case 3: /* italic */
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/* Unsupported */
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break;
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case 4: /* underline */
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case 21: /* double underline */
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/* Wikipedia says this flag does nothing */
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/* Furthermore, mingw doesn't define this flag
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attr |= COMMON_LVB_UNDERSCORE; */
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break;
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case 24: /* no underline */
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/* attr &= ~COMMON_LVB_UNDERSCORE; */
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break;
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case 5: /* slow blink */
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case 6: /* fast blink */
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/* We don't have blink, but we do have
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background intensity */
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attr |= BACKGROUND_INTENSITY;
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break;
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case 25: /* no blink */
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attr &= ~BACKGROUND_INTENSITY;
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break;
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case 7: /* negative */
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negative = 1;
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break;
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case 27: /* positive */
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negative = 0;
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break;
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case 8: /* conceal */
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case 28: /* reveal */
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/* Unsupported */
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break;
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case 30: /* Black */
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attr &= ~FOREGROUND_ALL;
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break;
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case 31: /* Red */
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attr &= ~FOREGROUND_ALL;
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attr |= FOREGROUND_RED;
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break;
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case 32: /* Green */
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attr &= ~FOREGROUND_ALL;
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attr |= FOREGROUND_GREEN;
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break;
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case 33: /* Yellow */
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attr &= ~FOREGROUND_ALL;
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attr |= FOREGROUND_RED | FOREGROUND_GREEN;
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break;
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case 34: /* Blue */
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attr &= ~FOREGROUND_ALL;
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attr |= FOREGROUND_BLUE;
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break;
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case 35: /* Magenta */
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attr &= ~FOREGROUND_ALL;
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attr |= FOREGROUND_RED | FOREGROUND_BLUE;
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break;
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case 36: /* Cyan */
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attr &= ~FOREGROUND_ALL;
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attr |= FOREGROUND_GREEN | FOREGROUND_BLUE;
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break;
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case 37: /* White */
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attr |= FOREGROUND_RED |
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FOREGROUND_GREEN |
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FOREGROUND_BLUE;
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break;
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case 38: /* Unknown */
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break;
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case 39: /* reset */
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attr &= ~FOREGROUND_ALL;
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attr |= (plain_attr & FOREGROUND_ALL);
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break;
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case 40: /* Black */
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attr &= ~BACKGROUND_ALL;
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break;
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case 41: /* Red */
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attr &= ~BACKGROUND_ALL;
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attr |= BACKGROUND_RED;
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break;
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case 42: /* Green */
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attr &= ~BACKGROUND_ALL;
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attr |= BACKGROUND_GREEN;
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break;
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case 43: /* Yellow */
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attr &= ~BACKGROUND_ALL;
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attr |= BACKGROUND_RED | BACKGROUND_GREEN;
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break;
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case 44: /* Blue */
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attr &= ~BACKGROUND_ALL;
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attr |= BACKGROUND_BLUE;
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break;
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case 45: /* Magenta */
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attr &= ~BACKGROUND_ALL;
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attr |= BACKGROUND_RED | BACKGROUND_BLUE;
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break;
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case 46: /* Cyan */
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attr &= ~BACKGROUND_ALL;
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attr |= BACKGROUND_GREEN | BACKGROUND_BLUE;
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break;
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case 47: /* White */
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attr |= BACKGROUND_RED |
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BACKGROUND_GREEN |
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BACKGROUND_BLUE;
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break;
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case 48: /* Unknown */
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break;
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case 49: /* reset */
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attr &= ~BACKGROUND_ALL;
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attr |= (plain_attr & BACKGROUND_ALL);
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break;
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default:
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/* Unsupported code */
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break;
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}
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}
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set_console_attr();
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break;
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case 'K':
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erase_in_line();
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break;
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default:
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/* Unsupported code */
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break;
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}
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}
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enum {
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TEXT = 0, ESCAPE = 033, BRACKET = '['
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};
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static DWORD WINAPI console_thread(LPVOID unused)
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{
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unsigned char buffer[BUFFER_SIZE];
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DWORD bytes;
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int start, end = 0, c, parampos = 0, state = TEXT;
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int params[MAX_PARAMS];
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while (1) {
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/* read next chunk of bytes from the pipe */
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if (!ReadFile(hread, buffer + end, BUFFER_SIZE - end, &bytes,
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NULL)) {
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/* exit if pipe has been closed or disconnected */
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if (GetLastError() == ERROR_PIPE_NOT_CONNECTED ||
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GetLastError() == ERROR_BROKEN_PIPE)
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break;
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/* ignore other errors */
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continue;
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}
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/* scan the bytes and handle ANSI control codes */
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bytes += end;
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start = end = 0;
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while (end < bytes) {
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c = buffer[end++];
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switch (state) {
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case TEXT:
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if (c == ESCAPE) {
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/* print text seen so far */
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if (end - 1 > start)
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write_console(buffer + start,
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end - 1 - start);
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/* then start parsing escape sequence */
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start = end - 1;
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memset(params, 0, sizeof(params));
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parampos = 0;
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state = ESCAPE;
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}
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break;
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case ESCAPE:
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/* continue if "\033[", otherwise bail out */
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state = (c == BRACKET) ? BRACKET : TEXT;
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break;
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case BRACKET:
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/* parse [0-9;]* into array of parameters */
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if (c >= '0' && c <= '9') {
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params[parampos] *= 10;
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params[parampos] += c - '0';
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} else if (c == ';') {
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/*
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* next parameter, bail out if out of
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* bounds
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*/
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parampos++;
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if (parampos >= MAX_PARAMS)
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state = TEXT;
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} else {
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/*
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* end of escape sequence, change
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* console attributes
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*/
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set_attr(c, params, parampos + 1);
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start = end;
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state = TEXT;
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}
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break;
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}
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}
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/* print remaining text unless parsing an escape sequence */
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if (state == TEXT && end > start) {
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/* check for incomplete UTF-8 sequences and fix end */
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if (buffer[end - 1] >= 0x80) {
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if (buffer[end -1] >= 0xc0)
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end--;
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else if (end - 1 > start &&
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buffer[end - 2] >= 0xe0)
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end -= 2;
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else if (end - 2 > start &&
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buffer[end - 3] >= 0xf0)
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end -= 3;
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}
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/* print remaining complete UTF-8 sequences */
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if (end > start)
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write_console(buffer + start, end - start);
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/* move remaining bytes to the front */
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if (end < bytes)
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memmove(buffer, buffer + end, bytes - end);
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end = bytes - end;
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} else {
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/* all data has been consumed, mark buffer empty */
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end = 0;
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}
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}
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/* check if the console font supports unicode */
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warn_if_raster_font();
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CloseHandle(hread);
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return 0;
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}
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static void winansi_exit(void)
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{
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/* flush all streams */
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_flushall();
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/* signal console thread to exit */
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FlushFileBuffers(hwrite);
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DisconnectNamedPipe(hwrite);
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/* wait for console thread to copy remaining data */
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WaitForSingleObject(hthread, INFINITE);
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/* cleanup handles... */
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CloseHandle(hwrite);
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CloseHandle(hthread);
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}
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static void die_lasterr(const char *fmt, ...)
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{
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va_list params;
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va_start(params, fmt);
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errno = err_win_to_posix(GetLastError());
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die_errno(fmt, params);
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va_end(params);
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}
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static HANDLE duplicate_handle(HANDLE hnd)
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{
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HANDLE hresult, hproc = GetCurrentProcess();
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if (!DuplicateHandle(hproc, hnd, hproc, &hresult, 0, TRUE,
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DUPLICATE_SAME_ACCESS))
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die_lasterr("DuplicateHandle(%li) failed",
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(long) (intptr_t) hnd);
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return hresult;
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}
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static HANDLE swap_osfhnd(int fd, HANDLE new_handle)
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{
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/*
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* Create a copy of the original handle associated with fd
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* because the original will get closed when we dup2().
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*/
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HANDLE handle = (HANDLE)_get_osfhandle(fd);
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HANDLE duplicate = duplicate_handle(handle);
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/* Create a temp fd associated with the already open "new_handle". */
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int new_fd = _open_osfhandle((intptr_t)new_handle, O_BINARY);
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assert((fd == 1) || (fd == 2));
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/*
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* Use stock dup2() to re-bind fd to the new handle. Note that
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* this will implicitly close(1) and close both fd=1 and the
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* originally associated handle. It will open a new fd=1 and
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* call DuplicateHandle() on the handle associated with new_fd.
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* It is because of this implicit close() that we created the
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* copy of the original.
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*
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* Note that we need to update the cached console handle to the
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* duplicated one because the dup2() call will implicitly close
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* the original one.
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*
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* Note that dup2() when given target := {0,1,2} will also
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* call SetStdHandle(), so we don't need to worry about that.
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*/
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if (console == handle)
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console = duplicate;
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dup2(new_fd, fd);
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/* Close the temp fd. This explicitly closes "new_handle"
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* (because it has been associated with it).
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*/
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close(new_fd);
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if (fd == 2)
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setvbuf(stderr, NULL, _IONBF, BUFSIZ);
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fd_is_interactive[fd] |= FD_SWAPPED;
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return duplicate;
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}
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#ifdef DETECT_MSYS_TTY
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#include <winternl.h>
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#include <ntstatus.h>
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static void detect_msys_tty(int fd)
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{
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ULONG result;
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BYTE buffer[1024];
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POBJECT_NAME_INFORMATION nameinfo = (POBJECT_NAME_INFORMATION) buffer;
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PWSTR name;
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/* check if fd is a pipe */
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HANDLE h = (HANDLE) _get_osfhandle(fd);
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if (GetFileType(h) != FILE_TYPE_PIPE)
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return;
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/* get pipe name */
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if (!NT_SUCCESS(NtQueryObject(h, ObjectNameInformation,
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buffer, sizeof(buffer) - 2, &result)))
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return;
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name = nameinfo->Name.Buffer;
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name[nameinfo->Name.Length / sizeof(*name)] = 0;
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/*
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* Check if this could be a MSYS2 pty pipe ('msys-XXXX-ptyN-XX')
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* or a cygwin pty pipe ('cygwin-XXXX-ptyN-XX')
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*/
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if ((!wcsstr(name, L"msys-") && !wcsstr(name, L"cygwin-")) ||
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!wcsstr(name, L"-pty"))
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return;
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if (fd == 2)
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setvbuf(stderr, NULL, _IONBF, BUFSIZ);
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fd_is_interactive[fd] |= FD_MSYS;
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Wrapper for isatty(). Most calls in the main git code
|
|
* call isatty(1 or 2) to see if the instance is interactive
|
|
* and should: be colored, show progress, paginate output.
|
|
* We lie and give results for what the descriptor WAS at
|
|
* startup (and ignore any pipe redirection we internally
|
|
* do).
|
|
*/
|
|
#undef isatty
|
|
int winansi_isatty(int fd)
|
|
{
|
|
if (fd >= 0 && fd <= 2)
|
|
return fd_is_interactive[fd] != 0;
|
|
return isatty(fd);
|
|
}
|
|
|
|
void winansi_init(void)
|
|
{
|
|
int con1, con2;
|
|
char name[32];
|
|
|
|
/* check if either stdout or stderr is a console output screen buffer */
|
|
con1 = is_console(1);
|
|
con2 = is_console(2);
|
|
|
|
/* Also compute console bit for fd 0 even though we don't need the result here. */
|
|
is_console(0);
|
|
|
|
if (!con1 && !con2) {
|
|
#ifdef DETECT_MSYS_TTY
|
|
/* check if stdin / stdout / stderr are MSYS2 pty pipes */
|
|
detect_msys_tty(0);
|
|
detect_msys_tty(1);
|
|
detect_msys_tty(2);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
/* create a named pipe to communicate with the console thread */
|
|
xsnprintf(name, sizeof(name), "\\\\.\\pipe\\winansi%lu", GetCurrentProcessId());
|
|
hwrite = CreateNamedPipe(name, PIPE_ACCESS_OUTBOUND,
|
|
PIPE_TYPE_BYTE | PIPE_WAIT, 1, BUFFER_SIZE, 0, 0, NULL);
|
|
if (hwrite == INVALID_HANDLE_VALUE)
|
|
die_lasterr("CreateNamedPipe failed");
|
|
|
|
hread = CreateFile(name, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL);
|
|
if (hread == INVALID_HANDLE_VALUE)
|
|
die_lasterr("CreateFile for named pipe failed");
|
|
|
|
/* start console spool thread on the pipe's read end */
|
|
hthread = CreateThread(NULL, 0, console_thread, NULL, 0, NULL);
|
|
if (hthread == INVALID_HANDLE_VALUE)
|
|
die_lasterr("CreateThread(console_thread) failed");
|
|
|
|
/* schedule cleanup routine */
|
|
if (atexit(winansi_exit))
|
|
die_errno("atexit(winansi_exit) failed");
|
|
|
|
/* redirect stdout / stderr to the pipe */
|
|
if (con1)
|
|
hconsole1 = swap_osfhnd(1, duplicate_handle(hwrite));
|
|
if (con2)
|
|
hconsole2 = swap_osfhnd(2, duplicate_handle(hwrite));
|
|
}
|
|
|
|
/*
|
|
* Returns the real console handle if stdout / stderr is a pipe redirecting
|
|
* to the console. Allows spawn / exec to pass the console to the next process.
|
|
*/
|
|
HANDLE winansi_get_osfhandle(int fd)
|
|
{
|
|
if (fd == 1 && (fd_is_interactive[1] & FD_SWAPPED))
|
|
return hconsole1;
|
|
if (fd == 2 && (fd_is_interactive[2] & FD_SWAPPED))
|
|
return hconsole2;
|
|
|
|
return (HANDLE)_get_osfhandle(fd);
|
|
}
|