* Copyright 2008 Peter Harris <git@peter.is-a-geek.org>
*/
+#undef NOGDI
#include "../git-compat-util.h"
-
-/*
- Functions to be wrapped:
-*/
-#undef printf
-#undef fprintf
-#undef fputs
-/* TODO: write */
+#include <wingdi.h>
+#include <winreg.h>
/*
ANSI codes used by git: m, K
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 void init(void)
+static int is_console(int fd)
{
CONSOLE_SCREEN_BUFFER_INFO sbi;
+ HANDLE hcon;
static int initialized = 0;
- if (initialized)
- return;
- console = GetStdHandle(STD_OUTPUT_HANDLE);
- if (console == INVALID_HANDLE_VALUE)
- console = NULL;
+ /* get OS handle of the file descriptor */
+ hcon = (HANDLE) _get_osfhandle(fd);
+ if (hcon == INVALID_HANDLE_VALUE)
+ return 0;
- if (!console)
- return;
+ /* check if its a device (i.e. console, printer, serial port) */
+ if (GetFileType(hcon) != FILE_TYPE_CHAR)
+ return 0;
- GetConsoleScreenBufferInfo(console, &sbi);
- attr = plain_attr = sbi.wAttributes;
- negative = 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;
+ }
- 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)
&dummy);
}
-
-static const char *set_attr(const char *str)
+static void set_attr(char func, const int *params, int paramlen)
{
- const char *func;
- size_t len = strspn(str, "0123456789;");
- func = str + len;
-
- switch (*func) {
+ int i;
+ switch (func) {
case 'm':
- do {
- long val = strtol(str, (char **)&str, 10);
- switch (val) {
+ for (i = 0; i < paramlen; i++) {
+ switch (params[i]) {
case 0: /* reset */
attr = plain_attr;
negative = 0;
/* Unsupported code */
break;
}
- str++;
- } while (*(str-1) == ';');
-
+ }
set_console_attr();
break;
case 'K':
/* Unsupported code */
break;
}
-
- return func + 1;
}
-static int ansi_emulate(const char *str, FILE *stream)
+enum {
+ TEXT = 0, ESCAPE = 033, BRACKET = '['
+};
+
+static DWORD WINAPI console_thread(LPVOID unused)
{
- int rv = 0;
- const char *pos = str;
-
- while (*pos) {
- pos = strstr(str, "\033[");
- if (pos) {
- size_t len = pos - str;
-
- if (len) {
- size_t out_len = fwrite(str, 1, len, stream);
- rv += out_len;
- if (out_len < len)
- return rv;
+ 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;
}
+ }
- str = pos + 2;
- rv += 2;
+ /* 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;
+ }
- fflush(stream);
+ /* print remaining complete UTF-8 sequences */
+ if (end > start)
+ write_console(buffer + start, end - start);
- pos = set_attr(str);
- rv += pos - str;
- str = pos;
+ /* move remaining bytes to the front */
+ if (end < bytes)
+ memmove(buffer, buffer + end, bytes - end);
+ end = bytes - end;
} else {
- rv += strlen(str);
- fputs(str, stream);
- return rv;
+ /* all data has been consumed, mark buffer empty */
+ end = 0;
}
}
- return rv;
+
+ /* check if the console font supports unicode */
+ warn_if_raster_font();
+
+ CloseHandle(hread);
+ return 0;
}
-int winansi_fputs(const char *str, FILE *stream)
+static void winansi_exit(void)
{
- int rv;
-
- if (!isatty(fileno(stream)))
- return fputs(str, stream);
+ /* flush all streams */
+ _flushall();
- init();
+ /* signal console thread to exit */
+ FlushFileBuffers(hwrite);
+ DisconnectNamedPipe(hwrite);
- if (!console)
- return fputs(str, stream);
+ /* wait for console thread to copy remaining data */
+ WaitForSingleObject(hthread, INFINITE);
- rv = ansi_emulate(str, stream);
+ /* cleanup handles... */
+ CloseHandle(hwrite);
+ CloseHandle(hthread);
+}
- if (rv >= 0)
- return 0;
- else
- return EOF;
+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 int winansi_vfprintf(FILE *stream, const char *format, va_list list)
+static HANDLE duplicate_handle(HANDLE hnd)
{
- int len, rv;
- char small_buf[256];
- char *buf = small_buf;
- va_list cp;
+ HANDLE hresult, hproc = GetCurrentProcess();
+ if (!DuplicateHandle(hproc, hnd, hproc, &hresult, 0, TRUE,
+ DUPLICATE_SAME_ACCESS))
+ die_lasterr("DuplicateHandle(%li) failed", (long) hnd);
+ return hresult;
+}
- if (!isatty(fileno(stream)))
- goto abort;
- init();
+/*
+ * 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;
- if (!console)
- goto abort;
+extern __declspec(dllimport) ioinfo *__pioinfo[];
- va_copy(cp, list);
- len = vsnprintf(small_buf, sizeof(small_buf), format, cp);
- va_end(cp);
+static size_t sizeof_ioinfo = 0;
- if (len > sizeof(small_buf) - 1) {
- buf = malloc(len + 1);
- if (!buf)
- goto abort;
+#define IOINFO_L2E 5
+#define IOINFO_ARRAY_ELTS (1 << IOINFO_L2E)
- len = vsnprintf(buf, len + 1, format, list);
- }
+#define FDEV 0x40
- rv = ansi_emulate(buf, stream);
+static inline ioinfo* _pioinfo(int fd)
+{
+ return (ioinfo*)((char*)__pioinfo[fd >> IOINFO_L2E] +
+ (fd & (IOINFO_ARRAY_ELTS - 1)) * sizeof_ioinfo);
+}
- if (buf != small_buf)
- free(buf);
- return rv;
+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;
+}
-abort:
- rv = vfprintf(stream, format, list);
- return rv;
+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;
}
-int winansi_fprintf(FILE *stream, const char *format, ...)
+void winansi_init(void)
{
- va_list list;
- int rv;
+ int con1, con2;
+ char name[32];
- va_start(list, format);
- rv = winansi_vfprintf(stream, format, list);
- va_end(list);
+ /* check if either stdout or stderr is a console output screen buffer */
+ con1 = is_console(1);
+ con2 = is_console(2);
+ if (!con1 && !con2)
+ return;
- return rv;
+ /* 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));
}
-int winansi_printf(const char *format, ...)
+/*
+ * 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)
{
- va_list list;
- int rv;
-
- va_start(list, format);
- rv = winansi_vfprintf(stdout, format, list);
- va_end(list);
-
- return rv;
+ 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;
}