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-rw-r--r--compat/winansi.c579
1 files changed, 579 insertions, 0 deletions
diff --git a/compat/winansi.c b/compat/winansi.c
new file mode 100644
index 0000000000..efc5bb3a4b
--- /dev/null
+++ b/compat/winansi.c
@@ -0,0 +1,579 @@
+/*
+ * 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 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 12:17:16 +0000