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io.c
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/**********************************************************************
io.c -
$Author$
created at: Fri Oct 15 18:08:59 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby/ruby.h"
#include "ruby/io.h"
#include "vm_core.h"
#include <ctype.h>
#include <errno.h>
#define free(x) xfree(x)
#if defined(DOSISH) || defined(__CYGWIN__)
#include <io.h>
#endif
#include <sys/types.h>
#if defined HAVE_NET_SOCKET_H
# include <net/socket.h>
#elif defined HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#if defined(MSDOS) || defined(__BOW__) || defined(__CYGWIN__) || defined(_WIN32) || defined(__human68k__) || defined(__EMX__) || defined(__BEOS__)
# define NO_SAFE_RENAME
#endif
#if defined(MSDOS) || defined(__CYGWIN__) || defined(_WIN32)
# define NO_LONG_FNAME
#endif
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(sun) || defined(_nec_ews)
# define USE_SETVBUF
#endif
#ifdef __QNXNTO__
#include "unix.h"
#endif
#include <sys/types.h>
#if defined(HAVE_SYS_IOCTL_H) && !defined(DJGPP) && !defined(_WIN32) && !defined(__human68k__)
#include <sys/ioctl.h>
#endif
#if defined(HAVE_FCNTL_H) || defined(_WIN32)
#include <fcntl.h>
#elif defined(HAVE_SYS_FCNTL_H)
#include <sys/fcntl.h>
#endif
#if !HAVE_OFF_T && !defined(off_t)
# define off_t long
#endif
#include <sys/stat.h>
/* EMX has sys/param.h, but.. */
#if defined(HAVE_SYS_PARAM_H) && !(defined(__EMX__) || defined(__HIUX_MPP__))
# include <sys/param.h>
#endif
#if !defined NOFILE
# define NOFILE 64
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYSCALL_H
#include <syscall.h>
#elif defined HAVE_SYS_SYSCALL_H
#include <sys/syscall.h>
#endif
extern void Init_File(void);
#ifdef __BEOS__
# ifndef NOFILE
# define NOFILE (OPEN_MAX)
# endif
#endif
#include "ruby/util.h"
#ifndef O_ACCMODE
#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
#endif
#if SIZEOF_OFF_T > SIZEOF_LONG && !defined(HAVE_LONG_LONG)
# error off_t is bigger than long, but you have no long long...
#endif
#ifndef PIPE_BUF
# ifdef _POSIX_PIPE_BUF
# define PIPE_BUF _POSIX_PIPE_BUF
# else
# define PIPE_BUF 512 /* is this ok? */
# endif
#endif
VALUE rb_cIO;
VALUE rb_eEOFError;
VALUE rb_eIOError;
VALUE rb_stdin, rb_stdout, rb_stderr;
VALUE rb_deferr; /* rescue VIM plugin */
static VALUE orig_stdout, orig_stderr;
VALUE rb_output_fs;
VALUE rb_rs;
VALUE rb_output_rs;
VALUE rb_default_rs;
static VALUE argf;
static ID id_write, id_read, id_getc, id_flush, id_readpartial;
static VALUE sym_mode, sym_perm, sym_extenc, sym_intenc, sym_encoding, sym_open_args;
static VALUE sym_textmode, sym_binmode;
struct timeval rb_time_interval(VALUE);
struct argf {
VALUE filename, current_file;
int gets_lineno;
int init_p, next_p;
VALUE lineno;
VALUE argv;
char *inplace;
int binmode;
struct rb_io_enc_t encs;
};
static int max_file_descriptor = NOFILE;
#define UPDATE_MAXFD(fd) \
do { \
if (max_file_descriptor < (fd)) max_file_descriptor = (fd); \
} while (0)
#define argf_of(obj) (*(struct argf *)DATA_PTR(obj))
#define ARGF argf_of(argf)
#ifdef _STDIO_USES_IOSTREAM /* GNU libc */
# ifdef _IO_fpos_t
# define STDIO_READ_DATA_PENDING(fp) ((fp)->_IO_read_ptr != (fp)->_IO_read_end)
# else
# define STDIO_READ_DATA_PENDING(fp) ((fp)->_gptr < (fp)->_egptr)
# endif
#elif defined(FILE_COUNT)
# define STDIO_READ_DATA_PENDING(fp) ((fp)->FILE_COUNT > 0)
#elif defined(FILE_READEND)
# define STDIO_READ_DATA_PENDING(fp) ((fp)->FILE_READPTR < (fp)->FILE_READEND)
#elif defined(__BEOS__)
# define STDIO_READ_DATA_PENDING(fp) (fp->_state._eof == 0)
#elif defined(__VMS)
# define STDIO_READ_DATA_PENDING(fp) (((unsigned int)(*(fp))->_cnt) > 0)
#else
# define STDIO_READ_DATA_PENDING(fp) (!feof(fp))
#endif
#if defined(__VMS)
#define open(file_spec, flags, mode) open(file_spec, flags, mode, "rfm=stmlf")
#endif
#define GetWriteIO(io) rb_io_get_write_io(io)
#define READ_DATA_PENDING(fptr) ((fptr)->rbuf_len)
#define READ_DATA_PENDING_COUNT(fptr) ((fptr)->rbuf_len)
#define READ_DATA_PENDING_PTR(fptr) ((fptr)->rbuf+(fptr)->rbuf_off)
#define READ_DATA_BUFFERED(fptr) READ_DATA_PENDING(fptr)
#define READ_CHECK(fptr) do {\
if (!READ_DATA_PENDING(fptr)) {\
rb_thread_wait_fd((fptr)->fd);\
rb_io_check_closed(fptr);\
}\
} while(0)
#ifndef S_ISSOCK
# ifdef _S_ISSOCK
# define S_ISSOCK(m) _S_ISSOCK(m)
# else
# ifdef _S_IFSOCK
# define S_ISSOCK(m) ((m & S_IFMT) == _S_IFSOCK)
# else
# ifdef S_IFSOCK
# define S_ISSOCK(m) ((m & S_IFMT) == S_IFSOCK)
# endif
# endif
# endif
#endif
#if !defined HAVE_SHUTDOWN && !defined shutdown
#define shutdown(a,b) 0
#endif
#define rb_sys_fail_path(path) rb_sys_fail(NIL_P(path) ? 0 : RSTRING_PTR(path))
#if defined(_WIN32)
#define is_socket(fd, path) rb_w32_is_socket(fd)
#elif !defined(S_ISSOCK)
#define is_socket(fd, path) 0
#else
static int
is_socket(int fd, VALUE path)
{
struct stat sbuf;
if (fstat(fd, &sbuf) < 0)
rb_sys_fail_path(path);
return S_ISSOCK(sbuf.st_mode);
}
#endif
void
rb_eof_error(void)
{
rb_raise(rb_eEOFError, "end of file reached");
}
VALUE
rb_io_taint_check(VALUE io)
{
if (!OBJ_UNTRUSTED(io) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: operation on trusted IO");
rb_check_frozen(io);
return io;
}
void
rb_io_check_initialized(rb_io_t *fptr)
{
if (!fptr) {
rb_raise(rb_eIOError, "uninitialized stream");
}
}
void
rb_io_check_closed(rb_io_t *fptr)
{
rb_io_check_initialized(fptr);
if (fptr->fd < 0) {
rb_raise(rb_eIOError, "closed stream");
}
}
static int io_fflush(rb_io_t *);
VALUE
rb_io_get_io(VALUE io)
{
return rb_convert_type(io, T_FILE, "IO", "to_io");
}
static VALUE
rb_io_check_io(VALUE io)
{
return rb_check_convert_type(io, T_FILE, "IO", "to_io");
}
VALUE
rb_io_get_write_io(VALUE io)
{
VALUE write_io;
rb_io_check_initialized(RFILE(io)->fptr);
write_io = RFILE(io)->fptr->tied_io_for_writing;
if (write_io) {
return write_io;
}
return io;
}
/*
* call-seq:
* IO.try_convert(obj) -> io or nil
*
* Try to convert <i>obj</i> into an IO, using to_io method.
* Returns converted IO or nil if <i>obj</i> cannot be converted
* for any reason.
*
* IO.try_convert(STDOUT) # => STDOUT
* IO.try_convert("STDOUT") # => nil
*/
static VALUE
rb_io_s_try_convert(VALUE dummy, VALUE io)
{
return rb_io_check_io(io);
}
static void
io_unread(rb_io_t *fptr)
{
off_t r;
rb_io_check_closed(fptr);
if (fptr->rbuf_len == 0 || fptr->mode & FMODE_DUPLEX)
return;
/* xxx: target position may be negative if buffer is filled by ungetc */
r = lseek(fptr->fd, -fptr->rbuf_len, SEEK_CUR);
if (r < 0) {
if (errno == ESPIPE)
fptr->mode |= FMODE_DUPLEX;
return;
}
fptr->rbuf_off = 0;
fptr->rbuf_len = 0;
return;
}
static rb_encoding *io_input_encoding(rb_io_t *fptr);
static void
io_ungetbyte(VALUE str, rb_io_t *fptr)
{
int len = RSTRING_LEN(str);
if (fptr->rbuf == NULL) {
fptr->rbuf_off = 0;
fptr->rbuf_len = 0;
if (len > 8192)
fptr->rbuf_capa = len;
else
fptr->rbuf_capa = 8192;
fptr->rbuf = ALLOC_N(char, fptr->rbuf_capa);
}
if (fptr->rbuf_capa < len + fptr->rbuf_len) {
rb_raise(rb_eIOError, "ungetbyte failed");
}
if (fptr->rbuf_off < len) {
MEMMOVE(fptr->rbuf+fptr->rbuf_capa-fptr->rbuf_len,
fptr->rbuf+fptr->rbuf_off,
char, fptr->rbuf_len);
fptr->rbuf_off = fptr->rbuf_capa-fptr->rbuf_len;
}
fptr->rbuf_off-=len;
fptr->rbuf_len+=len;
MEMMOVE(fptr->rbuf+fptr->rbuf_off, RSTRING_PTR(str), char, len);
}
static rb_io_t *
flush_before_seek(rb_io_t *fptr)
{
io_fflush(fptr);
io_unread(fptr);
errno = 0;
return fptr;
}
#define io_seek(fptr, ofs, whence) lseek(flush_before_seek(fptr)->fd, ofs, whence)
#define io_tell(fptr) lseek(flush_before_seek(fptr)->fd, 0, SEEK_CUR)
#ifndef SEEK_CUR
# define SEEK_SET 0
# define SEEK_CUR 1
# define SEEK_END 2
#endif
#define FMODE_SYNCWRITE (FMODE_SYNC|FMODE_WRITABLE)
void
rb_io_check_readable(rb_io_t *fptr)
{
rb_io_check_closed(fptr);
if (!(fptr->mode & FMODE_READABLE)) {
rb_raise(rb_eIOError, "not opened for reading");
}
if (fptr->wbuf_len) {
io_fflush(fptr);
}
if (fptr->tied_io_for_writing) {
rb_io_t *wfptr;
GetOpenFile(fptr->tied_io_for_writing, wfptr);
io_fflush(wfptr);
}
}
static rb_encoding*
io_read_encoding(rb_io_t *fptr)
{
if (fptr->encs.enc) {
return fptr->encs.enc;
}
return rb_default_external_encoding();
}
static rb_encoding*
io_input_encoding(rb_io_t *fptr)
{
if (fptr->encs.enc2) {
return fptr->encs.enc2;
}
return io_read_encoding(fptr);
}
void
rb_io_check_writable(rb_io_t *fptr)
{
rb_io_check_closed(fptr);
if (!(fptr->mode & FMODE_WRITABLE)) {
rb_raise(rb_eIOError, "not opened for writing");
}
if (fptr->rbuf_len) {
io_unread(fptr);
}
}
int
rb_read_pending(FILE *fp)
{
return STDIO_READ_DATA_PENDING(fp);
}
int
rb_io_read_pending(rb_io_t *fptr)
{
return READ_DATA_PENDING(fptr);
}
void
rb_read_check(FILE *fp)
{
if (!STDIO_READ_DATA_PENDING(fp)) {
rb_thread_wait_fd(fileno(fp));
}
}
void
rb_io_read_check(rb_io_t *fptr)
{
if (!READ_DATA_PENDING(fptr)) {
rb_thread_wait_fd(fptr->fd);
}
return;
}
static int
ruby_dup(int orig)
{
int fd;
fd = dup(orig);
if (fd < 0) {
if (errno == EMFILE || errno == ENFILE || errno == ENOMEM) {
rb_gc();
fd = dup(orig);
}
if (fd < 0) {
rb_sys_fail(0);
}
}
return fd;
}
static VALUE
io_alloc(VALUE klass)
{
NEWOBJ(io, struct RFile);
OBJSETUP(io, klass, T_FILE);
io->fptr = 0;
return (VALUE)io;
}
#ifndef S_ISREG
# define S_ISREG(m) ((m & S_IFMT) == S_IFREG)
#endif
static int
wsplit_p(rb_io_t *fptr)
{
#if defined(HAVE_FCNTL) && defined(F_GETFL) && defined(O_NONBLOCK)
int r;
#endif
if (!(fptr->mode & FMODE_WSPLIT_INITIALIZED)) {
struct stat buf;
if (fstat(fptr->fd, &buf) == 0 &&
!S_ISREG(buf.st_mode)
#if defined(HAVE_FCNTL) && defined(F_GETFL) && defined(O_NONBLOCK)
&& (r = fcntl(fptr->fd, F_GETFL)) != -1 &&
!(r & O_NONBLOCK)
#endif
) {
fptr->mode |= FMODE_WSPLIT;
}
fptr->mode |= FMODE_WSPLIT_INITIALIZED;
}
return fptr->mode & FMODE_WSPLIT;
}
struct io_internal_struct {
int fd;
void *buf;
size_t capa;
};
static VALUE
internal_read_func(void *ptr)
{
struct io_internal_struct *iis = (struct io_internal_struct*)ptr;
return read(iis->fd, iis->buf, iis->capa);
}
static VALUE
internal_write_func(void *ptr)
{
struct io_internal_struct *iis = (struct io_internal_struct*)ptr;
return write(iis->fd, iis->buf, iis->capa);
}
static int
rb_read_internal(int fd, void *buf, size_t count)
{
struct io_internal_struct iis;
iis.fd = fd;
iis.buf = buf;
iis.capa = count;
return rb_thread_blocking_region(internal_read_func, &iis, RUBY_UBF_IO, 0);
}
static int
rb_write_internal(int fd, void *buf, size_t count)
{
struct io_internal_struct iis;
iis.fd = fd;
iis.buf = buf;
iis.capa = count;
return rb_thread_blocking_region(internal_write_func, &iis, RUBY_UBF_IO, 0);
}
static int
io_fflush(rb_io_t *fptr)
{
int r, l;
int wbuf_off, wbuf_len;
rb_io_check_closed(fptr);
if (fptr->wbuf_len == 0)
return 0;
if (!rb_thread_fd_writable(fptr->fd)) {
rb_io_check_closed(fptr);
}
retry:
if (fptr->wbuf_len == 0)
return 0;
wbuf_off = fptr->wbuf_off;
wbuf_len = fptr->wbuf_len;
l = wbuf_len;
if (PIPE_BUF < l &&
!rb_thread_alone() &&
wsplit_p(fptr)) {
l = PIPE_BUF;
}
r = rb_write_internal(fptr->fd, fptr->wbuf+wbuf_off, l);
/* xxx: Other threads may modify wbuf.
* A lock is required, definitely. */
rb_io_check_closed(fptr);
if (fptr->wbuf_len <= r) {
fptr->wbuf_off = 0;
fptr->wbuf_len = 0;
return 0;
}
if (0 <= r) {
fptr->wbuf_off += r;
fptr->wbuf_len -= r;
errno = EAGAIN;
}
if (rb_io_wait_writable(fptr->fd)) {
rb_io_check_closed(fptr);
goto retry;
}
return -1;
}
#ifdef HAVE_RB_FD_INIT
static VALUE
wait_readable(VALUE p)
{
rb_fdset_t *rfds = (rb_fdset_t *)p;
return rb_thread_select(rb_fd_max(rfds), rb_fd_ptr(rfds), NULL, NULL, NULL);
}
#endif
int
rb_io_wait_readable(int f)
{
rb_fdset_t rfds;
if (f < 0) {
rb_raise(rb_eIOError, "closed stream");
}
switch (errno) {
case EINTR:
#if defined(ERESTART)
case ERESTART:
#endif
rb_thread_wait_fd(f);
return Qtrue;
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
rb_fd_init(&rfds);
rb_fd_set(f, &rfds);
#ifdef HAVE_RB_FD_INIT
rb_ensure(wait_readable, (VALUE)&rfds,
(VALUE (*)(VALUE))rb_fd_term, (VALUE)&rfds);
#else
rb_thread_select(f + 1, &rfds, NULL, NULL, NULL);
#endif
return Qtrue;
default:
return Qfalse;
}
}
#ifdef HAVE_RB_FD_INIT
static VALUE
wait_writable(VALUE p)
{
rb_fdset_t *wfds = (rb_fdset_t *)p;
return rb_thread_select(rb_fd_max(wfds), NULL, rb_fd_ptr(wfds), NULL, NULL);
}
#endif
int
rb_io_wait_writable(int f)
{
rb_fdset_t wfds;
if (f < 0) {
rb_raise(rb_eIOError, "closed stream");
}
switch (errno) {
case EINTR:
#if defined(ERESTART)
case ERESTART:
#endif
rb_thread_fd_writable(f);
return Qtrue;
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
rb_fd_init(&wfds);
rb_fd_set(f, &wfds);
#ifdef HAVE_RB_FD_INIT
rb_ensure(wait_writable, (VALUE)&wfds,
(VALUE (*)(VALUE))rb_fd_term, (VALUE)&wfds);
#else
rb_thread_select(f + 1, NULL, &wfds, NULL, NULL);
#endif
return Qtrue;
default:
return Qfalse;
}
}
#if defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32)
/* Windows */
# define NEED_NEWLINE_DECORATOR_ON_READ(fptr) (!(fptr->mode & FMODE_BINMODE))
# define NEED_NEWLINE_DECORATOR_ON_WRITE(fptr) (!(fptr->mode & FMODE_BINMODE))
# define TEXTMODE_NEWLINE_DECORATOR_ON_WRITE ECONV_CRLF_NEWLINE_DECORATOR
#else
/* Unix */
# define NEED_NEWLINE_DECORATOR_ON_READ(fptr) (fptr->mode & FMODE_TEXTMODE)
# define NEED_NEWLINE_DECORATOR_ON_WRITE(fptr) 0
#endif
#define NEED_READCONV(fptr) (fptr->encs.enc2 != NULL || NEED_NEWLINE_DECORATOR_ON_READ(fptr))
#define NEED_WRITECONV(fptr) (fptr->encs.enc != NULL || NEED_NEWLINE_DECORATOR_ON_WRITE(fptr) || (fptr->encs.ecflags & (ECONV_DECORATOR_MASK|ECONV_STATEFUL_DECORATOR_MASK)))
static void
make_writeconv(rb_io_t *fptr)
{
if (!fptr->writeconv_initialized) {
const char *senc, *denc;
rb_encoding *enc;
int ecflags;
VALUE ecopts;
fptr->writeconv_initialized = 1;
ecflags = fptr->encs.ecflags;
ecopts = fptr->encs.ecopts;
#ifdef TEXTMODE_NEWLINE_DECORATOR_ON_WRITE
if (NEED_NEWLINE_DECORATOR_ON_WRITE(fptr))
ecflags |= TEXTMODE_NEWLINE_DECORATOR_ON_WRITE;
#endif
if (!fptr->encs.enc) {
/* no encoding conversion */
fptr->writeconv_pre_ecflags = 0;
fptr->writeconv_pre_ecopts = Qnil;
fptr->writeconv = rb_econv_open_opts("", "", ecflags, ecopts);
if (!fptr->writeconv)
rb_exc_raise(rb_econv_open_exc("", "", ecflags));
fptr->writeconv_asciicompat = Qnil;
}
else {
enc = fptr->encs.enc2 ? fptr->encs.enc2 : fptr->encs.enc;
senc = rb_econv_asciicompat_encoding(rb_enc_name(enc));
if (!senc && !(fptr->encs.ecflags & ECONV_STATEFUL_DECORATOR_MASK)) {
/* single conversion */
fptr->writeconv_pre_ecflags = ecflags;
fptr->writeconv_pre_ecopts = ecopts;
fptr->writeconv = NULL;
fptr->writeconv_asciicompat = Qnil;
}
else {
/* double conversion */
fptr->writeconv_pre_ecflags = ecflags & ~ECONV_STATEFUL_DECORATOR_MASK;
fptr->writeconv_pre_ecopts = ecopts;
if (senc) {
denc = rb_enc_name(enc);
fptr->writeconv_asciicompat = rb_str_new2(senc);
}
else {
senc = denc = "";
fptr->writeconv_asciicompat = rb_str_new2(rb_enc_name(enc));
}
ecflags = fptr->encs.ecflags & (ECONV_ERROR_HANDLER_MASK|ECONV_STATEFUL_DECORATOR_MASK);
ecopts = fptr->encs.ecopts;
fptr->writeconv = rb_econv_open_opts(senc, denc, ecflags, ecopts);
if (!fptr->writeconv)
rb_exc_raise(rb_econv_open_exc(senc, denc, ecflags));
}
}
}
}
/* writing functions */
static long
io_binwrite(VALUE str, rb_io_t *fptr)
{
long len, n, r, l, offset = 0;
len = RSTRING_LEN(str);
if ((n = len) <= 0) return n;
if (fptr->wbuf == NULL && !(fptr->mode & FMODE_SYNC)) {
fptr->wbuf_off = 0;
fptr->wbuf_len = 0;
fptr->wbuf_capa = 8192;
fptr->wbuf = ALLOC_N(char, fptr->wbuf_capa);
}
if ((fptr->mode & (FMODE_SYNC|FMODE_TTY)) ||
(fptr->wbuf && fptr->wbuf_capa <= fptr->wbuf_len + len)) {
/* xxx: use writev to avoid double write if available */
if (fptr->wbuf_len && fptr->wbuf_len+len <= fptr->wbuf_capa) {
if (fptr->wbuf_capa < fptr->wbuf_off+fptr->wbuf_len+len) {
MEMMOVE(fptr->wbuf, fptr->wbuf+fptr->wbuf_off, char, fptr->wbuf_len);
fptr->wbuf_off = 0;
}
MEMMOVE(fptr->wbuf+fptr->wbuf_off+fptr->wbuf_len, RSTRING_PTR(str)+offset, char, len);
fptr->wbuf_len += len;
n = 0;
}
if (io_fflush(fptr) < 0)
return -1L;
if (n == 0)
return len;
/* avoid context switch between "a" and "\n" in STDERR.puts "a".
[ruby-dev:25080] */
if (fptr->stdio_file != stderr && !rb_thread_fd_writable(fptr->fd)) {
rb_io_check_closed(fptr);
}
retry:
l = n;
if (PIPE_BUF < l &&
!rb_thread_alone() &&
wsplit_p(fptr)) {
l = PIPE_BUF;
}
r = rb_write_internal(fptr->fd, RSTRING_PTR(str)+offset, l);
/* xxx: other threads may modify given string. */
if (r == n) return len;
if (0 <= r) {
offset += r;
n -= r;
errno = EAGAIN;
}
if (rb_io_wait_writable(fptr->fd)) {
rb_io_check_closed(fptr);
if (offset < RSTRING_LEN(str))
goto retry;
}
return -1L;
}
if (fptr->wbuf_off) {
if (fptr->wbuf_len)
MEMMOVE(fptr->wbuf, fptr->wbuf+fptr->wbuf_off, char, fptr->wbuf_len);
fptr->wbuf_off = 0;
}
MEMMOVE(fptr->wbuf+fptr->wbuf_off+fptr->wbuf_len, RSTRING_PTR(str)+offset, char, len);
fptr->wbuf_len += len;
return len;
}
static long
io_fwrite(VALUE str, rb_io_t *fptr)
{
if (NEED_WRITECONV(fptr)) {
VALUE common_encoding = Qnil;
make_writeconv(fptr);
if (fptr->writeconv) {
if (!NIL_P(fptr->writeconv_asciicompat))
common_encoding = fptr->writeconv_asciicompat;
else if (!rb_enc_asciicompat(rb_enc_get(str))) {
rb_raise(rb_eArgError, "ASCII incompatible string written for text mode IO without encoding conversion: %s",
rb_enc_name(rb_enc_get(str)));
}
}
else {
if (fptr->encs.enc2)
common_encoding = rb_enc_from_encoding(fptr->encs.enc2);
else
common_encoding = rb_enc_from_encoding(fptr->encs.enc);
}
if (!NIL_P(common_encoding)) {
str = rb_str_transcode(str, common_encoding,
fptr->writeconv_pre_ecflags, fptr->writeconv_pre_ecopts);
}
if (fptr->writeconv) {
str = rb_econv_str_convert(fptr->writeconv, str, ECONV_PARTIAL_INPUT);
}
}
return io_binwrite(str, fptr);
}
long
rb_io_fwrite(const char *ptr, long len, FILE *f)
{
rb_io_t of;
of.fd = fileno(f);
of.stdio_file = f;
of.mode = FMODE_WRITABLE;
of.pathv = Qnil;
return io_fwrite(rb_str_new(ptr, len), &of);
}
/*
* call-seq:
* ios.write(string) => integer
*
* Writes the given string to <em>ios</em>. The stream must be opened
* for writing. If the argument is not a string, it will be converted
* to a string using <code>to_s</code>. Returns the number of bytes
* written.
*
* count = $stdout.write( "This is a test\n" )
* puts "That was #{count} bytes of data"
*
* <em>produces:</em>
*
* This is a test
* That was 15 bytes of data
*/
static VALUE
io_write(VALUE io, VALUE str)
{
rb_io_t *fptr;
long n;
VALUE tmp;
rb_secure(4);
io = GetWriteIO(io);
str = rb_obj_as_string(str);
tmp = rb_io_check_io(io);
if (NIL_P(tmp)) {
/* port is not IO, call write method for it. */
return rb_funcall(io, id_write, 1, str);
}
io = tmp;
if (RSTRING_LEN(str) == 0) return INT2FIX(0);
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
n = io_fwrite(str, fptr);
if (n == -1L) rb_sys_fail_path(fptr->pathv);
return LONG2FIX(n);
}
VALUE
rb_io_write(VALUE io, VALUE str)
{
return rb_funcall(io, id_write, 1, str);
}
/*
* call-seq:
* ios << obj => ios
*
* String Output---Writes <i>obj</i> to <em>ios</em>.
* <i>obj</i> will be converted to a string using
* <code>to_s</code>.
*
* $stdout << "Hello " << "world!\n"
*
* <em>produces:</em>
*
* Hello world!
*/
VALUE
rb_io_addstr(VALUE io, VALUE str)
{
rb_io_write(io, str);
return io;
}
/*
* call-seq:
* ios.flush => ios
*
* Flushes any buffered data within <em>ios</em> to the underlying
* operating system (note that this is Ruby internal buffering only;
* the OS may buffer the data as well).
*
* $stdout.print "no newline"
* $stdout.flush
*
* <em>produces:</em>
*
* no newline
*/
VALUE
rb_io_flush(VALUE io)
{
rb_io_t *fptr;
if (TYPE(io) != T_FILE) {
return rb_funcall(io, id_flush, 0);
}
io = GetWriteIO(io);
GetOpenFile(io, fptr);
if (fptr->mode & FMODE_WRITABLE) {
io_fflush(fptr);
}
if (fptr->mode & FMODE_READABLE) {
io_unread(fptr);
}
return io;
}
/*
* call-seq:
* ios.pos => integer
* ios.tell => integer
*
* Returns the current offset (in bytes) of <em>ios</em>.
*
* f = File.new("testfile")
* f.pos #=> 0
* f.gets #=> "This is line one\n"
* f.pos #=> 17
*/
static VALUE
rb_io_tell(VALUE io)
{
rb_io_t *fptr;
off_t pos;
GetOpenFile(io, fptr);
pos = io_tell(fptr);
if (pos < 0 && errno) rb_sys_fail_path(fptr->pathv);
return OFFT2NUM(pos);
}
static VALUE
rb_io_seek(VALUE io, VALUE offset, int whence)