* ext/io/console: imported. [ruby-dev:40897]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27668 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 532 insertions, 0 deletions

diff --git a/ext/io/console/console.c b/ext/io/console/console.c
new file mode 100644
index 0000000000..a521312e47
--- /dev/null
+++ b/ext/io/console/console.c
@@ -0,0 +1,532 @@
+/* -*- c-file-style: "ruby" -*- */
+/*
+ * console IO module
+ */
+#include "ruby.h"
+#ifdef HAVE_RUBY_IO_H
+#include "ruby/io.h"
+#else
+#include "rubyio.h"
+#endif
+
+#ifndef HAVE_RB_IO_T
+typedef OpenFile rb_io_t;
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#if defined HAVE_TERMIOS_H
+# include <termios.h>
+typedef struct termios conmode;
+# define setattr(fd, t) (tcsetattr(fd, TCSAFLUSH, t) == 0)
+# define getattr(fd, t) (tcgetattr(fd, t) == 0)
+#elif defined HAVE_TERMIO_H
+# include <termio.h>
+typedef struct termio conmode;
+# define setattr(fd, t) (ioctl(fd, TCSETAF, t) == 0)
+# define getattr(fd, t) (ioctl(fd, TCGETA, t) == 0)
+#elif defined HAVE_SGTTY_H
+# include <sgtty.h>
+typedef struct sgttyb conmode;
+# ifdef HAVE_STTY
+# define setattr(fd, t)  (stty(fd, t) == 0)
+# else
+# define setattr(fd, t)  (ioctl((fd), TIOCSETP, (t)) == 0)
+# endif
+# ifdef HAVE_GTTY
+# define getattr(fd, t)  (gtty(fd, t) == 0)
+# else
+# define getattr(fd, t)  (ioctl((fd), TIOCGETP, (t)) == 0)
+# endif
+#elif defined _WIN32
+#include <winioctl.h>
+typedef DWORD conmode;
+
+#ifdef HAVE_RB_W32_MAP_ERRNO
+#define LAST_ERROR rb_w32_map_errno(GetLastError())
+#else
+#define LAST_ERROR EBADF
+#endif
+#define SET_LAST_ERROR (errno = LAST_ERROR, 0)
+
+static int
+setattr(int fd, conmode *t)
+{
+    int x = SetConsoleMode((HANDLE)rb_w32_get_osfhandle(fd), *t);
+    if (!x) errno = LAST_ERROR;
+    return x;
+}
+
+static int
+getattr(int fd, conmode *t)
+{
+    int x = GetConsoleMode((HANDLE)rb_w32_get_osfhandle(fd), t);
+    if (!x) errno = LAST_ERROR;
+    return x;
+}
+#endif
+#ifndef SET_LAST_ERROR
+#define SET_LAST_ERROR (0)
+#endif
+
+#ifndef InitVM
+#define InitVM(ext) {void InitVM_##ext(void);InitVM_##ext();}
+#endif
+
+static ID id_getc, id_console;
+
+static void
+set_rawmode(conmode *t)
+{
+#ifdef HAVE_CFMAKERAW
+    cfmakeraw(t);
+#else
+#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
+    t->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
+    t->c_oflag &= ~OPOST;
+    t->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
+    t->c_cflag &= ~(CSIZE|PARENB);
+    t->c_cflag |= CS8;
+#elif defined HAVE_SGTTY_H
+    t->sg_flags &= ~ECHO;
+    t->sg_flags |= RAW;
+#elif defined _WIN32
+    *t = 0;
+#endif
+#endif
+}
+
+static void
+set_noecho(conmode *t)
+{
+#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
+    t->c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
+#elif defined HAVE_SGTTY_H
+    t->sg_flags &= ~ECHO;
+#elif defined _WIN32
+    *t &= ~ENABLE_ECHO_INPUT;
+#endif
+}
+
+static void
+set_echo(conmode *t)
+{
+#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
+    t->c_lflag |= (ECHO | ECHOE | ECHOK | ECHONL);
+#elif defined HAVE_SGTTY_H
+    t->sg_flags |= ECHO;
+#elif defined _WIN32
+    *t |= ENABLE_ECHO_INPUT;
+#endif
+}
+
+static int
+echo_p(conmode *t)
+{
+#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
+    return (t->c_lflag & (ECHO | ECHOE | ECHOK | ECHONL)) != 0;
+#elif defined HAVE_SGTTY_H
+    return (t->sg_flags & ECHO) != 0;
+#elif defined _WIN32
+    return (*t & ENABLE_ECHO_INPUT) != 0;
+#endif
+}
+
+static int
+set_ttymode(int fd, conmode *t, void (*setter)(conmode *))
+{
+    conmode r;
+    if (!getattr(fd, t)) return 0;
+    r = *t;
+    setter(&r);
+    return setattr(fd, &r);
+}
+
+#ifdef GetReadFile
+#define GetReadFD(fptr) fileno(GetReadFile(fptr))
+#else
+#define GetReadFD(fptr) ((fptr)->fd)
+#endif
+
+#ifdef GetWriteFile
+#define GetWriteFD(fptr) fileno(GetWriteFile(fptr))
+#else
+static inline int
+get_write_fd(const rb_io_t *fptr)
+{
+    VALUE wio = fptr->tied_io_for_writing;
+    rb_io_t *ofptr;
+    if (!wio) return -1;
+    GetOpenFile(wio, ofptr);
+    return ofptr->fd;
+}
+#define GetWriteFD(fptr) get_write_fd(fptr)
+#endif
+
+#define FD_PER_IO 2
+
+static VALUE
+ttymode(VALUE io, VALUE (*func)(VALUE), void (*setter)(conmode *))
+{
+    rb_io_t *fptr;
+    int status = -1;
+    int error = 0;
+    int fd[FD_PER_IO];
+    conmode t[FD_PER_IO];
+    VALUE result = Qnil;
+
+    GetOpenFile(io, fptr);
+    fd[0] = GetReadFD(fptr);
+    if (fd[0] != -1) {
+	if (set_ttymode(fd[0], t+0, setter)) {
+	    status = 0;
+	}
+	else {
+	    error = errno;
+	    fd[0] = -1;
+	}
+    }
+    fd[1] = GetWriteFD(fptr);
+    if (fd[1] != -1 && fd[1] != fd[0]) {
+	if (set_ttymode(fd[1], t+1, setter)) {
+	    status = 0;
+	}
+	else {
+	    error = errno;
+	    fd[1] = -1;
+	}
+    }
+    if (status == 0) {
+	result = rb_protect(func, io, &status);
+    }
+    GetOpenFile(io, fptr);
+    if (fd[0] != -1 && fd[0] == GetReadFD(fptr)) {
+	if (!setattr(fd[0], t+0)) {
+	    error = errno;
+	    status = -1;
+	}
+    }
+    if (fd[1] != -1 && fd[1] != fd[0] && fd[1] == GetWriteFD(fptr)) {
+	if (!setattr(fd[1], t+1)) {
+	    error = errno;
+	    status = -1;
+	}
+    }
+    if (status) {
+	if (status == -1) {
+	    errno = error;
+	    rb_sys_fail(0);
+	}
+	rb_jump_tag(status);
+    }
+    return result;
+}
+
+/*
+ * call-seq:
+ *   io.raw {|io| }
+ *
+ * Yields +self+ within raw mode.
+ *
+ *   STDIN.raw(&:gets)
+ *
+ * will read and return a line with echo back and line editing.
+ */
+static VALUE
+console_raw(VALUE io)
+{
+    return ttymode(io, rb_yield, set_rawmode);
+}
+
+static VALUE
+getc_call(VALUE io)
+{
+    return rb_funcall2(io, id_getc, 0, 0);
+}
+
+/*
+ * call-seq:
+ *   io.getch       -> char
+ *
+ * Reads and returns a character in raw mode.
+ */
+static VALUE
+console_getch(VALUE io)
+{
+    return ttymode(io, getc_call, set_rawmode);
+}
+
+/*
+ * call-seq:
+ *   io.noecho {|io| }
+ *
+ * Yields +self+ with disabling echo back.
+ *
+ *   STDIN.noecho(&:gets)
+ *
+ * will read and return a line without echo back.
+ */
+static VALUE
+console_noecho(VALUE io)
+{
+    return ttymode(io, rb_yield, set_noecho);
+}
+
+/*
+ * call-seq:
+ *   io.echo = flag
+ *
+ * Enables/disables echo back.
+ */
+static VALUE
+console_set_echo(VALUE io, VALUE f)
+{
+    conmode t;
+    rb_io_t *fptr;
+    int fd;
+
+    GetOpenFile(io, fptr);
+    fd = GetWriteFD(fptr);
+    if (!getattr(fd, &t)) rb_sys_fail(0);
+    if (RTEST(f))
+	set_echo(&t);
+    else
+	set_noecho(&t);
+    if (!setattr(fd, &t)) rb_sys_fail(0);
+    return io;
+}
+
+/*
+ * call-seq:
+ *   io.echo?       -> true or false
+ *
+ * Returns +true+ if echo back is enabled.
+ */
+static VALUE
+console_echo_p(VALUE io)
+{
+    conmode t;
+    rb_io_t *fptr;
+    int fd;
+
+    GetOpenFile(io, fptr);
+    fd = GetWriteFD(fptr);
+    if (!getattr(fd, &t)) rb_sys_fail(0);
+    return echo_p(&t) ? Qtrue : Qfalse;
+}
+
+#if defined TIOCGWINSZ
+typedef struct winsize rb_console_size_t;
+#define getwinsize(fd, buf) (ioctl((fd), TIOCGWINSZ, (buf)) == 0)
+#define winsize_row(buf) (buf)->ws_row
+#define winsize_col(buf) (buf)->ws_col
+#elif defined _WIN32
+typedef CONSOLE_SCREEN_BUFFER_INFO rb_console_size_t;
+#define getwinsize(fd, buf) ( \
+    GetConsoleScreenBufferInfo((HANDLE)rb_w32_get_osfhandle(fd), (buf)) || \
+    SET_LAST_ERROR)
+#define winsize_row(buf) (buf)->dwSize.Y
+#define winsize_col(buf) (buf)->dwSize.X
+#endif
+
+#if defined TIOCGWINSZ || defined _WIN32
+#define USE_CONSOLE_GETSIZE 1
+#endif
+
+#ifdef USE_CONSOLE_GETSIZE
+/*
+ * call-seq:
+ *   io.winsize     -> [rows, columns]
+ *
+ * Returns console size.
+ */
+static VALUE
+console_winsize(VALUE io)
+{
+    rb_io_t *fptr;
+    int fd;
+    rb_console_size_t ws;
+
+    GetOpenFile(io, fptr);
+#ifdef GetWriteFile
+    fd = fileno(GetWriteFile(fptr));
+#else
+# if defined HAVE_RB_IO_GET_WRITE_IO
+    io = fptr->tied_io_for_writing;
+    if (io) {
+	GetOpenFile(io, fptr);
+    }
+# endif
+    fd = fptr->fd;
+#endif
+    if (!getwinsize(fd, &ws)) rb_sys_fail(0);
+    return rb_assoc_new(INT2NUM(winsize_row(&ws)), INT2NUM(winsize_col(&ws)));
+}
+#endif
+
+/*
+ * call-seq:
+ *   io.iflush
+ *
+ * Flushes input buffer in kernel.
+ */
+static VALUE
+console_iflush(VALUE io)
+{
+    rb_io_t *fptr;
+    int fd;
+
+    GetOpenFile(io, fptr);
+    fd = GetReadFD(fptr);
+#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
+    if (tcflush(fd, TCIFLUSH)) rb_sys_fail(0);
+#endif
+    return io;
+}
+
+/*
+ * call-seq:
+ *   io.oflush
+ *
+ * Flushes output buffer in kernel.
+ */
+static VALUE
+console_oflush(VALUE io)
+{
+    rb_io_t *fptr;
+    int fd;
+
+    GetOpenFile(io, fptr);
+    fd = GetWriteFD(fptr);
+#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
+    if (tcflush(fd, TCOFLUSH)) rb_sys_fail(0);
+#endif
+    return io;
+}
+
+/*
+ * call-seq:
+ *   io.ioflush
+ *
+ * Flushes input and output buffers in kernel.
+ */
+static VALUE
+console_ioflush(VALUE io)
+{
+    rb_io_t *fptr;
+#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
+    int fd1, fd2;
+#endif
+
+    GetOpenFile(io, fptr);
+#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
+    fd1 = GetReadFD(fptr);
+    fd2 = GetWriteFD(fptr);
+    if (fd2 != -1 && fd1 != fd2) {
+	if (tcflush(fd1, TCIFLUSH)) rb_sys_fail(0);
+	if (tcflush(fd2, TCOFLUSH)) rb_sys_fail(0);
+    }
+    else {
+	if (tcflush(fd1, TCIOFLUSH)) rb_sys_fail(0);
+    }
+#endif
+    return io;
+}
+
+/*
+ * call-seq:
+ *   IO.console      -> #<File:/dev/tty>
+ *
+ * Returns an File instance opened console.
+ */
+static VALUE
+console_dev(VALUE klass)
+{
+    VALUE con = 0;
+    rb_io_t *fptr;
+
+    if (klass == rb_cIO) klass = rb_cFile;
+    if (rb_const_defined(klass, id_console)) {
+	con = rb_const_get(klass, id_console);
+	if (TYPE(con) == T_FILE) {
+	    if ((fptr = RFILE(con)->fptr) && GetReadFD(fptr) != -1)
+		return con;
+	}
+	rb_mod_remove_const(klass, ID2SYM(id_console));
+    }
+    {
+	VALUE args[2];
+#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H || defined HAVE_SGTTY_H
+# define CONSOLE_DEVISE "/dev/tty"
+#elif defined _WIN32
+# define CONSOLE_DEVISE "con$"
+# define CONSOLE_DEVISE_FOR_READING "conin$"
+# define CONSOLE_DEVISE_FOR_WRITING "conout$"
+#endif
+#ifndef CONSOLE_DEVISE_FOR_READING
+# define CONSOLE_DEVISE_FOR_READING CONSOLE_DEVISE
+#endif
+#ifdef CONSOLE_DEVISE_FOR_WRITING
+	VALUE out;
+	rb_io_t *ofptr;
+#endif
+
+	args[1] = INT2FIX(O_RDWR);
+#ifdef CONSOLE_DEVISE_FOR_WRITING
+	args[0] = rb_str_new2(CONSOLE_DEVISE_FOR_WRITING);
+	out = rb_class_new_instance(2, args, klass);
+#endif
+	args[0] = rb_str_new2(CONSOLE_DEVISE_FOR_READING);
+	con = rb_class_new_instance(2, args, klass);
+#ifdef CONSOLE_DEVISE_FOR_WRITING
+	GetOpenFile(con, fptr);
+	GetOpenFile(out, ofptr);
+# ifdef HAVE_RB_IO_GET_WRITE_IO
+#   ifdef _WIN32
+	ofptr->pathv = fptr->pathv = rb_str_new2(CONSOLE_DEVISE);
+#   endif
+	fptr->tied_io_for_writing = out;
+# else
+	fptr->f2 = ofptr->f;
+	ofptr->f = 0;
+# endif
+	fptr->mode |= FMODE_WRITABLE;
+#endif
+	rb_const_set(klass, id_console, con);
+    }
+    return con;
+}
+
+/*
+ * IO console methods
+ */
+void
+Init_console(void)
+{
+    id_getc = rb_intern("getc");
+    id_console = rb_intern("console");
+    InitVM(console);
+}
+
+void
+InitVM_console(void)
+{
+    rb_define_method(rb_cIO, "raw", console_raw, 0);
+    rb_define_method(rb_cIO, "getch", console_getch, 0);
+    rb_define_method(rb_cIO, "echo=", console_set_echo, 1);
+    rb_define_method(rb_cIO, "echo?", console_echo_p, 0);
+    rb_define_method(rb_cIO, "noecho", console_noecho, 0);
+    rb_define_method(rb_cIO, "winsize", console_winsize, 0);
+    rb_define_method(rb_cIO, "iflush", console_iflush, 0);
+    rb_define_method(rb_cIO, "oflush", console_oflush, 0);
+    rb_define_method(rb_cIO, "ioflush", console_ioflush, 0);
+    rb_define_singleton_method(rb_cIO, "console", console_dev, 0);
+}