/* * Copyright 2008 Peter Harris */ #undef NOGDI #include "../git-compat-util.h" #include #include /* ANSI codes used by git: m, K This file is git-specific. Therefore, this file does not attempt to implement any codes that are not used by git. */ static HANDLE console; static WORD plain_attr; static WORD attr; static int negative; static int non_ascii_used = 0; static HANDLE hthread, hread, hwrite; static HANDLE hconsole1, hconsole2; #ifdef __MINGW32__ typedef struct _CONSOLE_FONT_INFOEX { ULONG cbSize; DWORD nFont; COORD dwFontSize; UINT FontFamily; UINT FontWeight; WCHAR FaceName[LF_FACESIZE]; } CONSOLE_FONT_INFOEX, *PCONSOLE_FONT_INFOEX; #endif typedef BOOL (WINAPI *PGETCURRENTCONSOLEFONTEX)(HANDLE, BOOL, PCONSOLE_FONT_INFOEX); static void warn_if_raster_font(void) { DWORD fontFamily = 0; PGETCURRENTCONSOLEFONTEX pGetCurrentConsoleFontEx; /* don't bother if output was ascii only */ if (!non_ascii_used) return; /* GetCurrentConsoleFontEx is available since Vista */ pGetCurrentConsoleFontEx = (PGETCURRENTCONSOLEFONTEX) GetProcAddress( GetModuleHandle("kernel32.dll"), "GetCurrentConsoleFontEx"); if (pGetCurrentConsoleFontEx) { CONSOLE_FONT_INFOEX cfi; cfi.cbSize = sizeof(cfi); if (pGetCurrentConsoleFontEx(console, 0, &cfi)) fontFamily = cfi.FontFamily; } else { /* pre-Vista: check default console font in registry */ HKEY hkey; if (ERROR_SUCCESS == RegOpenKeyExA(HKEY_CURRENT_USER, "Console", 0, KEY_READ, &hkey)) { DWORD size = sizeof(fontFamily); RegQueryValueExA(hkey, "FontFamily", NULL, NULL, (LPVOID) &fontFamily, &size); RegCloseKey(hkey); } } if (!(fontFamily & TMPF_TRUETYPE)) { const wchar_t *msg = L"\nWarning: Your console font probably " L"doesn\'t support Unicode. If you experience strange " L"characters in the output, consider switching to a " L"TrueType font such as Consolas!\n"; DWORD dummy; WriteConsoleW(console, msg, wcslen(msg), &dummy, NULL); } } static int is_console(int fd) { CONSOLE_SCREEN_BUFFER_INFO sbi; HANDLE hcon; static int initialized = 0; /* get OS handle of the file descriptor */ hcon = (HANDLE) _get_osfhandle(fd); if (hcon == INVALID_HANDLE_VALUE) return 0; /* check if its a device (i.e. console, printer, serial port) */ if (GetFileType(hcon) != FILE_TYPE_CHAR) return 0; /* check if its a handle to a console output screen buffer */ if (!GetConsoleScreenBufferInfo(hcon, &sbi)) return 0; /* initialize attributes */ if (!initialized) { console = hcon; attr = plain_attr = sbi.wAttributes; negative = 0; initialized = 1; } return 1; } #define BUFFER_SIZE 4096 #define MAX_PARAMS 16 static void write_console(unsigned char *str, size_t len) { /* only called from console_thread, so a static buffer will do */ static wchar_t wbuf[2 * BUFFER_SIZE + 1]; DWORD dummy; /* convert utf-8 to utf-16 */ int wlen = xutftowcsn(wbuf, (char*) str, ARRAY_SIZE(wbuf), len); /* write directly to console */ WriteConsoleW(console, wbuf, wlen, &dummy, NULL); /* remember if non-ascii characters are printed */ if (wlen != len) non_ascii_used = 1; } #define FOREGROUND_ALL (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE) #define BACKGROUND_ALL (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE) static void set_console_attr(void) { WORD attributes = attr; if (negative) { attributes &= ~FOREGROUND_ALL; attributes &= ~BACKGROUND_ALL; /* This could probably use a bitmask instead of a series of ifs */ if (attr & FOREGROUND_RED) attributes |= BACKGROUND_RED; if (attr & FOREGROUND_GREEN) attributes |= BACKGROUND_GREEN; if (attr & FOREGROUND_BLUE) attributes |= BACKGROUND_BLUE; if (attr & BACKGROUND_RED) attributes |= FOREGROUND_RED; if (attr & BACKGROUND_GREEN) attributes |= FOREGROUND_GREEN; if (attr & BACKGROUND_BLUE) attributes |= FOREGROUND_BLUE; } SetConsoleTextAttribute(console, attributes); } static void erase_in_line(void) { CONSOLE_SCREEN_BUFFER_INFO sbi; DWORD dummy; /* Needed for Windows 7 (or Vista) regression */ if (!console) return; GetConsoleScreenBufferInfo(console, &sbi); FillConsoleOutputCharacterA(console, ' ', sbi.dwSize.X - sbi.dwCursorPosition.X, sbi.dwCursorPosition, &dummy); } static void set_attr(char func, const int *params, int paramlen) { int i; switch (func) { case 'm': for (i = 0; i < paramlen; i++) { switch (params[i]) { case 0: /* reset */ attr = plain_attr; negative = 0; break; case 1: /* bold */ attr |= FOREGROUND_INTENSITY; break; case 2: /* faint */ case 22: /* normal */ attr &= ~FOREGROUND_INTENSITY; break; case 3: /* italic */ /* Unsupported */ break; case 4: /* underline */ case 21: /* double underline */ /* Wikipedia says this flag does nothing */ /* Furthermore, mingw doesn't define this flag attr |= COMMON_LVB_UNDERSCORE; */ break; case 24: /* no underline */ /* attr &= ~COMMON_LVB_UNDERSCORE; */ break; case 5: /* slow blink */ case 6: /* fast blink */ /* We don't have blink, but we do have background intensity */ attr |= BACKGROUND_INTENSITY; break; case 25: /* no blink */ attr &= ~BACKGROUND_INTENSITY; break; case 7: /* negative */ negative = 1; break; case 27: /* positive */ negative = 0; break; case 8: /* conceal */ case 28: /* reveal */ /* Unsupported */ break; case 30: /* Black */ attr &= ~FOREGROUND_ALL; break; case 31: /* Red */ attr &= ~FOREGROUND_ALL; attr |= FOREGROUND_RED; break; case 32: /* Green */ attr &= ~FOREGROUND_ALL; attr |= FOREGROUND_GREEN; break; case 33: /* Yellow */ attr &= ~FOREGROUND_ALL; attr |= FOREGROUND_RED | FOREGROUND_GREEN; break; case 34: /* Blue */ attr &= ~FOREGROUND_ALL; attr |= FOREGROUND_BLUE; break; case 35: /* Magenta */ attr &= ~FOREGROUND_ALL; attr |= FOREGROUND_RED | FOREGROUND_BLUE; break; case 36: /* Cyan */ attr &= ~FOREGROUND_ALL; attr |= FOREGROUND_GREEN | FOREGROUND_BLUE; break; case 37: /* White */ attr |= FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE; break; case 38: /* Unknown */ break; case 39: /* reset */ attr &= ~FOREGROUND_ALL; attr |= (plain_attr & FOREGROUND_ALL); break; case 40: /* Black */ attr &= ~BACKGROUND_ALL; break; case 41: /* Red */ attr &= ~BACKGROUND_ALL; attr |= BACKGROUND_RED; break; case 42: /* Green */ attr &= ~BACKGROUND_ALL; attr |= BACKGROUND_GREEN; break; case 43: /* Yellow */ attr &= ~BACKGROUND_ALL; attr |= BACKGROUND_RED | BACKGROUND_GREEN; break; case 44: /* Blue */ attr &= ~BACKGROUND_ALL; attr |= BACKGROUND_BLUE; break; case 45: /* Magenta */ attr &= ~BACKGROUND_ALL; attr |= BACKGROUND_RED | BACKGROUND_BLUE; break; case 46: /* Cyan */ attr &= ~BACKGROUND_ALL; attr |= BACKGROUND_GREEN | BACKGROUND_BLUE; break; case 47: /* White */ attr |= BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE; break; case 48: /* Unknown */ break; case 49: /* reset */ attr &= ~BACKGROUND_ALL; attr |= (plain_attr & BACKGROUND_ALL); break; default: /* Unsupported code */ break; } } set_console_attr(); break; case 'K': erase_in_line(); break; default: /* Unsupported code */ break; } } enum { TEXT = 0, ESCAPE = 033, BRACKET = '[' }; static DWORD WINAPI console_thread(LPVOID unused) { unsigned char buffer[BUFFER_SIZE]; DWORD bytes; int start, end = 0, c, parampos = 0, state = TEXT; int params[MAX_PARAMS]; while (1) { /* read next chunk of bytes from the pipe */ if (!ReadFile(hread, buffer + end, BUFFER_SIZE - end, &bytes, NULL)) { /* exit if pipe has been closed or disconnected */ if (GetLastError() == ERROR_PIPE_NOT_CONNECTED || GetLastError() == ERROR_BROKEN_PIPE) break; /* ignore other errors */ continue; } /* scan the bytes and handle ANSI control codes */ bytes += end; start = end = 0; while (end < bytes) { c = buffer[end++]; switch (state) { case TEXT: if (c == ESCAPE) { /* print text seen so far */ if (end - 1 > start) write_console(buffer + start, end - 1 - start); /* then start parsing escape sequence */ start = end - 1; memset(params, 0, sizeof(params)); parampos = 0; state = ESCAPE; } break; case ESCAPE: /* continue if "\033[", otherwise bail out */ state = (c == BRACKET) ? BRACKET : TEXT; break; case BRACKET: /* parse [0-9;]* into array of parameters */ if (c >= '0' && c <= '9') { params[parampos] *= 10; params[parampos] += c - '0'; } else if (c == ';') { /* * next parameter, bail out if out of * bounds */ parampos++; if (parampos >= MAX_PARAMS) state = TEXT; } else { /* * end of escape sequence, change * console attributes */ set_attr(c, params, parampos + 1); start = end; state = TEXT; } break; } } /* print remaining text unless parsing an escape sequence */ if (state == TEXT && end > start) { /* check for incomplete UTF-8 sequences and fix end */ if (buffer[end - 1] >= 0x80) { if (buffer[end -1] >= 0xc0) end--; else if (end - 1 > start && buffer[end - 2] >= 0xe0) end -= 2; else if (end - 2 > start && buffer[end - 3] >= 0xf0) end -= 3; } /* print remaining complete UTF-8 sequences */ if (end > start) write_console(buffer + start, end - start); /* move remaining bytes to the front */ if (end < bytes) memmove(buffer, buffer + end, bytes - end); end = bytes - end; } else { /* all data has been consumed, mark buffer empty */ end = 0; } } /* check if the console font supports unicode */ warn_if_raster_font(); CloseHandle(hread); return 0; } static void winansi_exit(void) { /* flush all streams */ _flushall(); /* signal console thread to exit */ FlushFileBuffers(hwrite); DisconnectNamedPipe(hwrite); /* wait for console thread to copy remaining data */ WaitForSingleObject(hthread, INFINITE); /* cleanup handles... */ CloseHandle(hwrite); CloseHandle(hthread); } static void die_lasterr(const char *fmt, ...) { va_list params; va_start(params, fmt); errno = err_win_to_posix(GetLastError()); die_errno(fmt, params); va_end(params); } static HANDLE duplicate_handle(HANDLE hnd) { HANDLE hresult, hproc = GetCurrentProcess(); if (!DuplicateHandle(hproc, hnd, hproc, &hresult, 0, TRUE, DUPLICATE_SAME_ACCESS)) die_lasterr("DuplicateHandle(%li) failed", (long) hnd); return hresult; } /* * Make MSVCRT's internal file descriptor control structure accessible * so that we can tweak OS handles and flags directly (we need MSVCRT * to treat our pipe handle as if it were a console). * * We assume that the ioinfo structure (exposed by MSVCRT.dll via * __pioinfo) starts with the OS handle and the flags. The exact size * varies between MSVCRT versions, so we try different sizes until * toggling the FDEV bit of _pioinfo(1)->osflags is reflected in * isatty(1). */ typedef struct { HANDLE osfhnd; char osflags; } ioinfo; extern __declspec(dllimport) ioinfo *__pioinfo[]; static size_t sizeof_ioinfo = 0; #define IOINFO_L2E 5 #define IOINFO_ARRAY_ELTS (1 << IOINFO_L2E) #define FDEV 0x40 static inline ioinfo* _pioinfo(int fd) { return (ioinfo*)((char*)__pioinfo[fd >> IOINFO_L2E] + (fd & (IOINFO_ARRAY_ELTS - 1)) * sizeof_ioinfo); } static int init_sizeof_ioinfo() { int istty, wastty; /* don't init twice */ if (sizeof_ioinfo) return sizeof_ioinfo >= 256; sizeof_ioinfo = sizeof(ioinfo); wastty = isatty(1); while (sizeof_ioinfo < 256) { /* toggle FDEV flag, check isatty, then toggle back */ _pioinfo(1)->osflags ^= FDEV; istty = isatty(1); _pioinfo(1)->osflags ^= FDEV; /* return if we found the correct size */ if (istty != wastty) return 0; sizeof_ioinfo += sizeof(void*); } error("Tweaking file descriptors doesn't work with this MSVCRT.dll"); return 1; } static HANDLE swap_osfhnd(int fd, HANDLE new_handle) { ioinfo *pioinfo; HANDLE old_handle; /* init ioinfo size if we haven't done so */ if (init_sizeof_ioinfo()) return INVALID_HANDLE_VALUE; /* get ioinfo pointer and change the handles */ pioinfo = _pioinfo(fd); old_handle = pioinfo->osfhnd; pioinfo->osfhnd = new_handle; return old_handle; } 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); if (!con1 && !con2) return; /* create a named pipe to communicate with the console thread */ sprintf(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) { HANDLE hnd = (HANDLE) _get_osfhandle(fd); if ((fd == 1 || fd == 2) && isatty(fd) && GetFileType(hnd) == FILE_TYPE_PIPE) return (fd == 1) ? hconsole1 : hconsole2; return hnd; }