[thirdparty/git.git] / compat / winansi.c

/*
 * Copyright 2008 Peter Harris <git@peter.is-a-geek.org>
 */

#undef NOGDI
#include "../git-compat-util.h"
#include <wingdi.h>
#include <winreg.h>

/*
 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 hwrite1 = INVALID_HANDLE_VALUE, hwrite2 = INVALID_HANDLE_VALUE;
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... */
	if (hwrite1 != INVALID_HANDLE_VALUE)
		CloseHandle(hwrite1);
	if (hwrite2 != INVALID_HANDLE_VALUE)
		CloseHandle(hwrite2);
	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, hwrite1 = duplicate_handle(hwrite));
	if (con2)
		hconsole2 = swap_osfhnd(2, hwrite2 = duplicate_handle(hwrite));
}

static int is_same_handle(HANDLE hnd, int fd)
{
	return hnd != INVALID_HANDLE_VALUE && hnd == (HANDLE) _get_osfhandle(fd);
}

/*
 * 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 && is_same_handle(hwrite1, 1))
		return hconsole1;
	else if (fd == 2 && is_same_handle(hwrite2, 2))
		return hconsole2;
	else
		return (HANDLE) _get_osfhandle(fd);
}
Commit	Line	Data
c09df8a7 PH	1	/*
	2	* Copyright 2008 Peter Harris <git@peter.is-a-geek.org>
	3	*/
	4
1edeb9ab	5	#undef NOGDI
c09df8a7	6	#include "../git-compat-util.h"
1edeb9ab KB	7	#include <wingdi.h>
1edeb9ab KB	8	#include <winreg.h>
c09df8a7	9
c09df8a7 PH	10	/*
	11	ANSI codes used by git: m, K
	12
	13	This file is git-specific. Therefore, this file does not attempt
	14	to implement any codes that are not used by git.
c09df8a7 PH	15	*/
	16
	17	static HANDLE console;
	18	static WORD plain_attr;
	19	static WORD attr;
	20	static int negative;
eac14f89 KB	21	static int non_ascii_used = 0;
	22	static HANDLE hthread, hread, hwrite;
	23	static HANDLE hwrite1 = INVALID_HANDLE_VALUE, hwrite2 = INVALID_HANDLE_VALUE;
	24	static HANDLE hconsole1, hconsole2;
c09df8a7	25
1edeb9ab KB	26	#ifdef __MINGW32__
	27	typedef struct _CONSOLE_FONT_INFOEX {
	28	ULONG cbSize;
	29	DWORD nFont;
	30	COORD dwFontSize;
	31	UINT FontFamily;
	32	UINT FontWeight;
	33	WCHAR FaceName[LF_FACESIZE];
	34	} CONSOLE_FONT_INFOEX, *PCONSOLE_FONT_INFOEX;
	35	#endif
	36
	37	typedef BOOL (WINAPI *PGETCURRENTCONSOLEFONTEX)(HANDLE, BOOL,
	38	PCONSOLE_FONT_INFOEX);
	39
eac14f89	40	static void warn_if_raster_font(void)
1edeb9ab	41	{
1edeb9ab KB	42	DWORD fontFamily = 0;
	43	PGETCURRENTCONSOLEFONTEX pGetCurrentConsoleFontEx;
	44
eac14f89 KB	45	/* don't bother if output was ascii only */
eac14f89 KB	46	if (!non_ascii_used)
1edeb9ab	47	return;
1edeb9ab KB	48
	49	/* GetCurrentConsoleFontEx is available since Vista */
	50	pGetCurrentConsoleFontEx = (PGETCURRENTCONSOLEFONTEX) GetProcAddress(
eac14f89 KB	51	GetModuleHandle("kernel32.dll"),
eac14f89 KB	52	"GetCurrentConsoleFontEx");
1edeb9ab KB	53	if (pGetCurrentConsoleFontEx) {
	54	CONSOLE_FONT_INFOEX cfi;
	55	cfi.cbSize = sizeof(cfi);
	56	if (pGetCurrentConsoleFontEx(console, 0, &cfi))
	57	fontFamily = cfi.FontFamily;
	58	} else {
	59	/* pre-Vista: check default console font in registry */
	60	HKEY hkey;
eac14f89 KB	61	if (ERROR_SUCCESS == RegOpenKeyExA(HKEY_CURRENT_USER, "Console",
eac14f89 KB	62	0, KEY_READ, &hkey)) {
1edeb9ab KB	63	DWORD size = sizeof(fontFamily);
	64	RegQueryValueExA(hkey, "FontFamily", NULL, NULL,
	65	(LPVOID) &fontFamily, &size);
	66	RegCloseKey(hkey);
	67	}
	68	}
	69
eac14f89 KB	70	if (!(fontFamily & TMPF_TRUETYPE)) {
	71	const wchar_t *msg = L"\nWarning: Your console font probably "
	72	L"doesn\'t support Unicode. If you experience strange "
	73	L"characters in the output, consider switching to a "
	74	L"TrueType font such as Consolas!\n";
	75	DWORD dummy;
	76	WriteConsoleW(console, msg, wcslen(msg), &dummy, NULL);
	77	}
1edeb9ab KB	78	}
1edeb9ab KB	79
eac14f89	80	static int is_console(int fd)
c09df8a7 PH	81	{
c09df8a7 PH	82	CONSOLE_SCREEN_BUFFER_INFO sbi;
143e6152	83	HANDLE hcon;
c09df8a7 PH	84
c09df8a7 PH	85	static int initialized = 0;
c09df8a7	86
eac14f89 KB	87	/* get OS handle of the file descriptor */
eac14f89 KB	88	hcon = (HANDLE) _get_osfhandle(fd);
143e6152 KB	89	if (hcon == INVALID_HANDLE_VALUE)
	90	return 0;
	91
eac14f89 KB	92	/* check if its a device (i.e. console, printer, serial port) */
	93	if (GetFileType(hcon) != FILE_TYPE_CHAR)
	94	return 0;
	95
143e6152 KB	96	/* check if its a handle to a console output screen buffer */
	97	if (!GetConsoleScreenBufferInfo(hcon, &sbi))
	98	return 0;
	99
eac14f89	100	/* initialize attributes */
143e6152	101	if (!initialized) {
fcd428f4	102	console = hcon;
143e6152 KB	103	attr = plain_attr = sbi.wAttributes;
	104	negative = 0;
	105	initialized = 1;
	106	}
c09df8a7	107
143e6152	108	return 1;
c09df8a7 PH	109	}
c09df8a7 PH	110
eac14f89 KB	111	#define BUFFER_SIZE 4096
	112	#define MAX_PARAMS 16
	113
	114	static void write_console(unsigned char *str, size_t len)
617ce965	115	{
eac14f89 KB	116	/* only called from console_thread, so a static buffer will do */
	117	static wchar_t wbuf[2 * BUFFER_SIZE + 1];
	118	DWORD dummy;
617ce965	119
eac14f89 KB	120	/* convert utf-8 to utf-16 */
eac14f89 KB	121	int wlen = xutftowcsn(wbuf, (char*) str, ARRAY_SIZE(wbuf), len);
617ce965	122
eac14f89 KB	123	/* write directly to console */
eac14f89 KB	124	WriteConsoleW(console, wbuf, wlen, &dummy, NULL);
1edeb9ab	125
eac14f89 KB	126	/* remember if non-ascii characters are printed */
	127	if (wlen != len)
	128	non_ascii_used = 1;
617ce965	129	}
c09df8a7 PH	130
	131	#define FOREGROUND_ALL (FOREGROUND_RED \| FOREGROUND_GREEN \| FOREGROUND_BLUE)
	132	#define BACKGROUND_ALL (BACKGROUND_RED \| BACKGROUND_GREEN \| BACKGROUND_BLUE)
	133
	134	static void set_console_attr(void)
	135	{
	136	WORD attributes = attr;
	137	if (negative) {
	138	attributes &= ~FOREGROUND_ALL;
	139	attributes &= ~BACKGROUND_ALL;
	140
	141	/* This could probably use a bitmask
	142	instead of a series of ifs */
	143	if (attr & FOREGROUND_RED)
	144	attributes \|= BACKGROUND_RED;
	145	if (attr & FOREGROUND_GREEN)
	146	attributes \|= BACKGROUND_GREEN;
	147	if (attr & FOREGROUND_BLUE)
	148	attributes \|= BACKGROUND_BLUE;
	149
	150	if (attr & BACKGROUND_RED)
	151	attributes \|= FOREGROUND_RED;
	152	if (attr & BACKGROUND_GREEN)
	153	attributes \|= FOREGROUND_GREEN;
	154	if (attr & BACKGROUND_BLUE)
	155	attributes \|= FOREGROUND_BLUE;
	156	}
	157	SetConsoleTextAttribute(console, attributes);
	158	}
	159
1897713f JS	160	static void erase_in_line(void)
	161	{
	162	CONSOLE_SCREEN_BUFFER_INFO sbi;
492f7091	163	DWORD dummy; /* Needed for Windows 7 (or Vista) regression */
1897713f JS	164
	165	if (!console)
	166	return;
	167
	168	GetConsoleScreenBufferInfo(console, &sbi);
	169	FillConsoleOutputCharacterA(console, ' ',
	170	sbi.dwSize.X - sbi.dwCursorPosition.X, sbi.dwCursorPosition,
492f7091	171	&dummy);
1897713f JS	172	}
1897713f JS	173
eac14f89	174	static void set_attr(char func, const int *params, int paramlen)
c09df8a7	175	{
eac14f89 KB	176	int i;
eac14f89 KB	177	switch (func) {
c09df8a7	178	case 'm':
eac14f89 KB	179	for (i = 0; i < paramlen; i++) {
eac14f89 KB	180	switch (params[i]) {
c09df8a7 PH	181	case 0: /* reset */
	182	attr = plain_attr;
	183	negative = 0;
	184	break;
	185	case 1: /* bold */
	186	attr \|= FOREGROUND_INTENSITY;
	187	break;
	188	case 2: /* faint */
	189	case 22: /* normal */
	190	attr &= ~FOREGROUND_INTENSITY;
	191	break;
	192	case 3: /* italic */
	193	/* Unsupported */
	194	break;
	195	case 4: /* underline */
	196	case 21: /* double underline */
	197	/* Wikipedia says this flag does nothing */
	198	/* Furthermore, mingw doesn't define this flag
	199	attr \|= COMMON_LVB_UNDERSCORE; */
	200	break;
	201	case 24: /* no underline */
	202	/* attr &= ~COMMON_LVB_UNDERSCORE; */
	203	break;
	204	case 5: /* slow blink */
	205	case 6: /* fast blink */
	206	/* We don't have blink, but we do have
	207	background intensity */
	208	attr \|= BACKGROUND_INTENSITY;
	209	break;
	210	case 25: /* no blink */
	211	attr &= ~BACKGROUND_INTENSITY;
	212	break;
	213	case 7: /* negative */
	214	negative = 1;
	215	break;
	216	case 27: /* positive */
	217	negative = 0;
	218	break;
	219	case 8: /* conceal */
	220	case 28: /* reveal */
	221	/* Unsupported */
	222	break;
	223	case 30: /* Black */
	224	attr &= ~FOREGROUND_ALL;
	225	break;
	226	case 31: /* Red */
	227	attr &= ~FOREGROUND_ALL;
	228	attr \|= FOREGROUND_RED;
	229	break;
	230	case 32: /* Green */
	231	attr &= ~FOREGROUND_ALL;
	232	attr \|= FOREGROUND_GREEN;
	233	break;
	234	case 33: /* Yellow */
	235	attr &= ~FOREGROUND_ALL;
	236	attr \|= FOREGROUND_RED \| FOREGROUND_GREEN;
	237	break;
	238	case 34: /* Blue */
	239	attr &= ~FOREGROUND_ALL;
	240	attr \|= FOREGROUND_BLUE;
	241	break;
	242	case 35: /* Magenta */
	243	attr &= ~FOREGROUND_ALL;
	244	attr \|= FOREGROUND_RED \| FOREGROUND_BLUE;
245	break;
246	case 36: /* Cyan */
247	attr &= ~FOREGROUND_ALL;
248	attr \|= FOREGROUND_GREEN \| FOREGROUND_BLUE;
249	break;
250	case 37: /* White */
251	attr \|= FOREGROUND_RED \|
252	FOREGROUND_GREEN \|
253	FOREGROUND_BLUE;
254	break;
255	case 38: /* Unknown */
256	break;
257	case 39: /* reset */
258	attr &= ~FOREGROUND_ALL;
259	attr \|= (plain_attr & FOREGROUND_ALL);
260	break;
261	case 40: /* Black */
262	attr &= ~BACKGROUND_ALL;
263	break;
264	case 41: /* Red */
265	attr &= ~BACKGROUND_ALL;
266	attr \|= BACKGROUND_RED;
267	break;
268	case 42: /* Green */
269	attr &= ~BACKGROUND_ALL;
270	attr \|= BACKGROUND_GREEN;
271	break;
272	case 43: /* Yellow */
273	attr &= ~BACKGROUND_ALL;
274	attr \|= BACKGROUND_RED \| BACKGROUND_GREEN;
275	break;
276	case 44: /* Blue */
277	attr &= ~BACKGROUND_ALL;
278	attr \|= BACKGROUND_BLUE;
279	break;
280	case 45: /* Magenta */
281	attr &= ~BACKGROUND_ALL;
282	attr \|= BACKGROUND_RED \| BACKGROUND_BLUE;
283	break;
284	case 46: /* Cyan */
285	attr &= ~BACKGROUND_ALL;
286	attr \|= BACKGROUND_GREEN \| BACKGROUND_BLUE;
287	break;
288	case 47: /* White */
289	attr \|= BACKGROUND_RED \|
290	BACKGROUND_GREEN \|
291	BACKGROUND_BLUE;
292	break;
293	case 48: /* Unknown */
294	break;
295	case 49: /* reset */
296	attr &= ~BACKGROUND_ALL;
297	attr \|= (plain_attr & BACKGROUND_ALL);
298	break;
299	default:
300	/* Unsupported code */
301	break;
302	}
eac14f89	303	}
c09df8a7 PH	304	set_console_attr();
	305	break;
	306	case 'K':
1897713f	307	erase_in_line();
c09df8a7 PH	308	break;
	309	default:
	310	/* Unsupported code */
	311	break;
	312	}
c09df8a7 PH	313	}
c09df8a7 PH	314
eac14f89 KB	315	enum {
	316	TEXT = 0, ESCAPE = 033, BRACKET = '['
	317	};
c09df8a7	318
eac14f89 KB	319	static DWORD WINAPI console_thread(LPVOID unused)
	320	{
	321	unsigned char buffer[BUFFER_SIZE];
	322	DWORD bytes;
	323	int start, end = 0, c, parampos = 0, state = TEXT;
	324	int params[MAX_PARAMS];
	325
	326	while (1) {
	327	/* read next chunk of bytes from the pipe */
	328	if (!ReadFile(hread, buffer + end, BUFFER_SIZE - end, &bytes,
	329	NULL)) {
	330	/* exit if pipe has been closed or disconnected */
	331	if (GetLastError() == ERROR_PIPE_NOT_CONNECTED \|\|
	332	GetLastError() == ERROR_BROKEN_PIPE)
	333	break;
	334	/* ignore other errors */
	335	continue;
	336	}
617ce965	337
eac14f89 KB	338	/* scan the bytes and handle ANSI control codes */
	339	bytes += end;
	340	start = end = 0;
	341	while (end < bytes) {
	342	c = buffer[end++];
	343	switch (state) {
	344	case TEXT:
	345	if (c == ESCAPE) {
	346	/* print text seen so far */
	347	if (end - 1 > start)
	348	write_console(buffer + start,
	349	end - 1 - start);
	350
	351	/* then start parsing escape sequence */
	352	start = end - 1;
	353	memset(params, 0, sizeof(params));
	354	parampos = 0;
	355	state = ESCAPE;
	356	}
	357	break;
	358
	359	case ESCAPE:
	360	/* continue if "\033[", otherwise bail out */
	361	state = (c == BRACKET) ? BRACKET : TEXT;
	362	break;
	363
	364	case BRACKET:
	365	/* parse [0-9;]* into array of parameters */
	366	if (c >= '0' && c <= '9') {
	367	params[parampos] *= 10;
	368	params[parampos] += c - '0';
	369	} else if (c == ';') {
	370	/*
	371	* next parameter, bail out if out of
	372	* bounds
	373	*/
	374	parampos++;
	375	if (parampos >= MAX_PARAMS)
	376	state = TEXT;
	377	} else {
	378	/*
	379	* end of escape sequence, change
	380	* console attributes
	381	*/
	382	set_attr(c, params, parampos + 1);
	383	start = end;
	384	state = TEXT;
	385	}
	386	break;
	387	}
	388	}
c09df8a7	389
eac14f89 KB	390	/* print remaining text unless parsing an escape sequence */
	391	if (state == TEXT && end > start) {
	392	/* check for incomplete UTF-8 sequences and fix end */
	393	if (buffer[end - 1] >= 0x80) {
	394	if (buffer[end -1] >= 0xc0)
	395	end--;
	396	else if (end - 1 > start &&
	397	buffer[end - 2] >= 0xe0)
	398	end -= 2;
	399	else if (end - 2 > start &&
	400	buffer[end - 3] >= 0xf0)
	401	end -= 3;
c09df8a7 PH	402	}
c09df8a7 PH	403
eac14f89 KB	404	/* print remaining complete UTF-8 sequences */
	405	if (end > start)
	406	write_console(buffer + start, end - start);
c09df8a7	407
eac14f89 KB	408	/* move remaining bytes to the front */
	409	if (end < bytes)
	410	memmove(buffer, buffer + end, bytes - end);
	411	end = bytes - end;
c09df8a7	412	} else {
eac14f89 KB	413	/* all data has been consumed, mark buffer empty */
eac14f89 KB	414	end = 0;
c09df8a7 PH	415	}
c09df8a7 PH	416	}
c09df8a7	417
eac14f89 KB	418	/* check if the console font supports unicode */
eac14f89 KB	419	warn_if_raster_font();
c09df8a7	420
eac14f89 KB	421	CloseHandle(hread);
eac14f89 KB	422	return 0;
c09df8a7 PH	423	}
c09df8a7 PH	424
eac14f89	425	static void winansi_exit(void)
c09df8a7	426	{
eac14f89 KB	427	/* flush all streams */
	428	_flushall();
	429
	430	/* signal console thread to exit */
	431	FlushFileBuffers(hwrite);
	432	DisconnectNamedPipe(hwrite);
	433
	434	/* wait for console thread to copy remaining data */
	435	WaitForSingleObject(hthread, INFINITE);
	436
	437	/* cleanup handles... */
	438	if (hwrite1 != INVALID_HANDLE_VALUE)
	439	CloseHandle(hwrite1);
	440	if (hwrite2 != INVALID_HANDLE_VALUE)
	441	CloseHandle(hwrite2);
	442	CloseHandle(hwrite);
	443	CloseHandle(hthread);
	444	}
c09df8a7	445
eac14f89 KB	446	static void die_lasterr(const char *fmt, ...)
	447	{
	448	va_list params;
	449	va_start(params, fmt);
	450	errno = err_win_to_posix(GetLastError());
	451	die_errno(fmt, params);
	452	va_end(params);
	453	}
c09df8a7	454
eac14f89 KB	455	static HANDLE duplicate_handle(HANDLE hnd)
	456	{
	457	HANDLE hresult, hproc = GetCurrentProcess();
	458	if (!DuplicateHandle(hproc, hnd, hproc, &hresult, 0, TRUE,
	459	DUPLICATE_SAME_ACCESS))
	460	die_lasterr("DuplicateHandle(%li) failed", (long) hnd);
	461	return hresult;
	462	}
c09df8a7	463
c09df8a7	464
fcd428f4 KB	465	/*
	466	* Make MSVCRT's internal file descriptor control structure accessible
	467	* so that we can tweak OS handles and flags directly (we need MSVCRT
	468	* to treat our pipe handle as if it were a console).
	469	*
	470	* We assume that the ioinfo structure (exposed by MSVCRT.dll via
	471	* __pioinfo) starts with the OS handle and the flags. The exact size
	472	* varies between MSVCRT versions, so we try different sizes until
	473	* toggling the FDEV bit of _pioinfo(1)->osflags is reflected in
	474	* isatty(1).
	475	*/
	476	typedef struct {
	477	HANDLE osfhnd;
	478	char osflags;
	479	} ioinfo;
	480
	481	extern __declspec(dllimport) ioinfo *__pioinfo[];
c09df8a7	482
fcd428f4	483	static size_t sizeof_ioinfo = 0;
c09df8a7	484
fcd428f4 KB	485	#define IOINFO_L2E 5
	486	#define IOINFO_ARRAY_ELTS (1 << IOINFO_L2E)
	487
	488	#define FDEV 0x40
	489
	490	static inline ioinfo* _pioinfo(int fd)
	491	{
	492	return (ioinfo)((char)__pioinfo[fd >> IOINFO_L2E] +
	493	(fd & (IOINFO_ARRAY_ELTS - 1)) * sizeof_ioinfo);
	494	}
	495
	496	static int init_sizeof_ioinfo()
	497	{
	498	int istty, wastty;
	499	/* don't init twice */
	500	if (sizeof_ioinfo)
	501	return sizeof_ioinfo >= 256;
	502
	503	sizeof_ioinfo = sizeof(ioinfo);
	504	wastty = isatty(1);
	505	while (sizeof_ioinfo < 256) {
	506	/* toggle FDEV flag, check isatty, then toggle back */
	507	_pioinfo(1)->osflags ^= FDEV;
	508	istty = isatty(1);
	509	_pioinfo(1)->osflags ^= FDEV;
	510	/* return if we found the correct size */
	511	if (istty != wastty)
	512	return 0;
	513	sizeof_ioinfo += sizeof(void*);
	514	}
	515	error("Tweaking file descriptors doesn't work with this MSVCRT.dll");
	516	return 1;
	517	}
	518
	519	static HANDLE swap_osfhnd(int fd, HANDLE new_handle)
	520	{
	521	ioinfo *pioinfo;
	522	HANDLE old_handle;
	523
	524	/* init ioinfo size if we haven't done so */
	525	if (init_sizeof_ioinfo())
	526	return INVALID_HANDLE_VALUE;
	527
	528	/* get ioinfo pointer and change the handles */
	529	pioinfo = _pioinfo(fd);
	530	old_handle = pioinfo->osfhnd;
	531	pioinfo->osfhnd = new_handle;
	532	return old_handle;
c09df8a7 PH	533	}
c09df8a7 PH	534
eac14f89	535	void winansi_init(void)
c09df8a7	536	{
fcd428f4	537	int con1, con2;
eac14f89	538	char name[32];
c09df8a7	539
eac14f89 KB	540	/* check if either stdout or stderr is a console output screen buffer */
	541	con1 = is_console(1);
	542	con2 = is_console(2);
	543	if (!con1 && !con2)
	544	return;
c09df8a7	545
eac14f89 KB	546	/* create a named pipe to communicate with the console thread */
	547	sprintf(name, "\\\\.\\pipe\\winansi%lu", GetCurrentProcessId());
	548	hwrite = CreateNamedPipe(name, PIPE_ACCESS_OUTBOUND,
	549	PIPE_TYPE_BYTE \| PIPE_WAIT, 1, BUFFER_SIZE, 0, 0, NULL);
	550	if (hwrite == INVALID_HANDLE_VALUE)
	551	die_lasterr("CreateNamedPipe failed");
	552
	553	hread = CreateFile(name, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL);
	554	if (hread == INVALID_HANDLE_VALUE)
	555	die_lasterr("CreateFile for named pipe failed");
	556
	557	/* start console spool thread on the pipe's read end */
	558	hthread = CreateThread(NULL, 0, console_thread, NULL, 0, NULL);
	559	if (hthread == INVALID_HANDLE_VALUE)
	560	die_lasterr("CreateThread(console_thread) failed");
	561
	562	/* schedule cleanup routine */
	563	if (atexit(winansi_exit))
	564	die_errno("atexit(winansi_exit) failed");
	565
eac14f89 KB	566	/* redirect stdout / stderr to the pipe */
eac14f89 KB	567	if (con1)
fcd428f4	568	hconsole1 = swap_osfhnd(1, hwrite1 = duplicate_handle(hwrite));
eac14f89	569	if (con2)
fcd428f4	570	hconsole2 = swap_osfhnd(2, hwrite2 = duplicate_handle(hwrite));
c09df8a7 PH	571	}
c09df8a7 PH	572
eac14f89	573	static int is_same_handle(HANDLE hnd, int fd)
c09df8a7	574	{
eac14f89 KB	575	return hnd != INVALID_HANDLE_VALUE && hnd == (HANDLE) _get_osfhandle(fd);
eac14f89 KB	576	}
c09df8a7	577
eac14f89 KB	578	/*
	579	* Returns the real console handle if stdout / stderr is a pipe redirecting
	580	* to the console. Allows spawn / exec to pass the console to the next process.
	581	*/
	582	HANDLE winansi_get_osfhandle(int fd)
	583	{
	584	if (fd == 1 && is_same_handle(hwrite1, 1))
	585	return hconsole1;
	586	else if (fd == 2 && is_same_handle(hwrite2, 2))
	587	return hconsole2;
	588	else
	589	return (HANDLE) _get_osfhandle(fd);
c09df8a7	590	}