X-Git-Url: https://git.hcoop.net/bpt/guile.git/blobdiff_plain/f2c9fcb07ed55b916c3ba5f2357686fda3ad011e..8ec84fe54e0bd4f04dfb29b37beedcda066f62c9:/libguile/ioext.c diff --git a/libguile/ioext.c b/libguile/ioext.c dissimilarity index 67% index 11d8ab5ae..66e32cb91 100644 --- a/libguile/ioext.c +++ b/libguile/ioext.c @@ -1,547 +1,311 @@ -/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this software; see the file COPYING. If not, write to - * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, - * Boston, MA 02111-1307 USA - * - * As a special exception, the Free Software Foundation gives permission - * for additional uses of the text contained in its release of GUILE. - * - * The exception is that, if you link the GUILE library with other files - * to produce an executable, this does not by itself cause the - * resulting executable to be covered by the GNU General Public License. - * Your use of that executable is in no way restricted on account of - * linking the GUILE library code into it. - * - * This exception does not however invalidate any other reasons why - * the executable file might be covered by the GNU General Public License. - * - * This exception applies only to the code released by the - * Free Software Foundation under the name GUILE. If you copy - * code from other Free Software Foundation releases into a copy of - * GUILE, as the General Public License permits, the exception does - * not apply to the code that you add in this way. To avoid misleading - * anyone as to the status of such modified files, you must delete - * this exception notice from them. - * - * If you write modifications of your own for GUILE, it is your choice - * whether to permit this exception to apply to your modifications. - * If you do not wish that, delete this exception notice. */ - -/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, - gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ - - - - -#include -#include "libguile/_scm.h" -#include "libguile/ports.h" -#include "libguile/read.h" -#include "libguile/fports.h" -#include "libguile/unif.h" -#include "libguile/chars.h" -#include "libguile/feature.h" -#include "libguile/root.h" -#include "libguile/strings.h" - -#include "libguile/validate.h" -#include "libguile/ioext.h" - -#include - -#ifdef HAVE_STRING_H -#include -#endif -#ifdef HAVE_UNISTD_H -#include -#endif - - -SCM_DEFINE (scm_read_delimited_x, "%read-delimited!", 3, 3, 0, - (SCM delims, SCM buf, SCM gobble, SCM port, SCM start, SCM end), - "Read characters from @var{port} into @var{buf} until one of the\n" - "characters in the @var{delims} string is encountered. If @var{gobble?}\n" - "is true, store the delimiter character in @var{buf} as well; otherwise,\n" - "discard it. If @var{port} is not specified, use the value of\n" - "@code{(current-input-port)}. If @var{start} or @var{end} are specified,\n" - "store data only into the substring of @var{buf} bounded by @var{start}\n" - "and @var{end} (which default to the beginning and end of the buffer,\n" - "respectively).\n\n" - "Return a pair consisting of the delimiter that terminated the string and\n" - "the number of characters read. If reading stopped at the end of file,\n" - "the delimiter returned is the @var{eof-object}; if the buffer was filled\n" - "without encountering a delimiter, this value is @var{#f}.") -#define FUNC_NAME s_scm_read_delimited_x -{ - long j; - char *cbuf; - long cstart; - long cend, tend; - int c; - char *cdelims; - int num_delims; - - SCM_VALIDATE_ROSTRING_COPY (1,delims,cdelims); - num_delims = SCM_ROLENGTH (delims); - SCM_VALIDATE_STRING_COPY (2,buf,cbuf); - cend = SCM_LENGTH (buf); - if (SCM_UNBNDP (port)) - port = scm_cur_inp; - else - SCM_VALIDATE_OPINPORT (4,port); - - SCM_VALIDATE_INUM_DEF_COPY (5,start,0,cstart); - SCM_ASSERT_RANGE(5, start, cstart >= 0 && cstart < cend); - - SCM_VALIDATE_INUM_DEF_COPY (6,end,cend,tend); - SCM_ASSERT_RANGE(6, end, tend > cstart && tend <= cend); - - cend = tend; - - for (j = cstart; j < cend; j++) - { - int k; - - c = scm_getc (port); - for (k = 0; k < num_delims; k++) - { - if (cdelims[k] == c) - { - if (SCM_FALSEP (gobble)) - scm_ungetc (c, port); - - return scm_cons (SCM_MAKE_CHAR (c), - scm_long2num (j - cstart)); - } - } - if (c == EOF) - return scm_cons (SCM_EOF_VAL, - scm_long2num (j - cstart)); - - cbuf[j] = c; - } - return scm_cons (SCM_BOOL_F, scm_long2num (j - cstart)); -} -#undef FUNC_NAME - -static unsigned char * -scm_do_read_line (SCM port, int *len_p) -{ - scm_port *pt = SCM_PTAB_ENTRY (port); - unsigned char *end; - - /* I thought reading lines was simple. Mercy me. */ - - /* The common case: the buffer contains a complete line. - This needs to be fast. */ - if ((end = memchr (pt->read_pos, '\n', (pt->read_end - pt->read_pos))) - != 0) - { - int buf_len = (end + 1) - pt->read_pos; - /* Allocate a buffer of the perfect size. */ - unsigned char *buf = scm_must_malloc (buf_len + 1, "%read-line"); - - memcpy (buf, pt->read_pos, buf_len); - pt->read_pos += buf_len; - - buf[buf_len] = '\0'; - - *len_p = buf_len; - return buf; - } - - /* The buffer contains no newlines. */ - { - /* When live, len is always the number of characters in the - current buffer that are part of the current line. */ - int len = (pt->read_end - pt->read_pos); - int buf_size = (len < 50) ? 60 : len * 2; - /* Invariant: buf always has buf_size + 1 characters allocated; - the `+ 1' is for the final '\0'. */ - unsigned char *buf = scm_must_malloc (buf_size + 1, "%read-line"); - int buf_len = 0; - - for (;;) - { - if (buf_len + len > buf_size) - { - int new_size = (buf_len + len) * 2; - buf = scm_must_realloc (buf, buf_size + 1, new_size + 1, - "%read-line"); - buf_size = new_size; - } - - /* Copy what we've got out of the port, into our buffer. */ - memcpy (buf + buf_len, pt->read_pos, len); - buf_len += len; - pt->read_pos += len; - - /* If we had seen a newline, we're done now. */ - if (end) - break; - - /* Get more characters. */ - if (scm_fill_input (port) == EOF) - { - /* If we're missing a final newline in the file, return - what we did get, sans newline. */ - if (buf_len > 0) - break; - - free (buf); - return 0; - } - - /* Search the buffer for newlines. */ - if ((end = memchr (pt->read_pos, '\n', - (len = (pt->read_end - pt->read_pos)))) - != 0) - len = (end - pt->read_pos) + 1; - } - - /* I wonder how expensive this realloc is. */ - buf = scm_must_realloc (buf, buf_size + 1, buf_len + 1, "%read-line"); - buf[buf_len] = '\0'; - *len_p = buf_len; - return buf; - } -} - - -/* - * %read-line - * truncates any terminating newline from its input, and returns - * a cons of the string read and its terminating character. Doing - * so makes it easy to implement the hairy `read-line' options - * efficiently in Scheme. - */ - -SCM_DEFINE (scm_read_line, "%read-line", 0, 1, 0, - (SCM port), - "Read a newline-terminated line from @var{port}, allocating storage as\n" - "necessary. The newline terminator (if any) is removed from the string,\n" - "and a pair consisting of the line and its delimiter is returned. The\n" - "delimiter may be either a newline or the @var{eof-object}; if\n" - "@code{%read-line} is called at the end of file, it returns the pair\n" - "@code{(# . #)}.") -#define FUNC_NAME s_scm_read_line -{ - scm_port *pt; - char *s; - int slen; - SCM line, term; - - if (SCM_UNBNDP (port)) - port = scm_cur_inp; - SCM_VALIDATE_OPINPORT (1,port); - - pt = SCM_PTAB_ENTRY (port); - if (pt->rw_active == SCM_PORT_WRITE) - scm_ptobs[SCM_PTOBNUM (port)].flush (port); - - s = scm_do_read_line (port, &slen); - - if (s == NULL) - term = line = SCM_EOF_VAL; - else - { - if (s[slen-1] == '\n') - { - term = SCM_MAKE_CHAR ('\n'); - s[slen-1] = '\0'; - line = scm_take_str (s, slen-1); - scm_done_malloc (-1); - SCM_INCLINE (port); - } - else - { - /* Fix: we should check for eof on the port before assuming this. */ - term = SCM_EOF_VAL; - line = scm_take_str (s, slen); - SCM_COL (port) += slen; - } - } - - if (pt->rw_random) - pt->rw_active = SCM_PORT_READ; - - return scm_cons (line, term); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_write_line, "write-line", 1, 1, 0, - (SCM obj, SCM port), - "Display @var{obj} and a newline character to @var{port}. If @var{port}\n" - "is not specified, @code{(current-output-port)} is used. This function\n" - "is equivalent to:\n\n" - "@smalllisp\n" - "(display obj [port])\n" - "(newline [port])\n" - "@end smalllisp") -#define FUNC_NAME s_scm_write_line -{ - scm_display (obj, port); - return scm_newline (port); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_ftell, "ftell", 1, 0, 0, - (SCM object), - "Returns an integer representing the current position of @var{fd/port},\n" - "measured from the beginning. Equivalent to:\n" - "@smalllisp\n" - "(seek port 0 SEEK_CUR)\n" - "@end smalllisp") -#define FUNC_NAME s_scm_ftell -{ - return scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); -} -#undef FUNC_NAME - - -#if (SCM_DEBUG_DEPRECATED == 0) - -SCM_DEFINE (scm_fseek, "fseek", 3, 0, 0, - (SCM object, SCM offset, SCM whence), - "Obsolete. Almost the same as seek, above, but the return value is\n" - "unspecified.") -#define FUNC_NAME s_scm_fseek -{ - scm_seek (object, offset, whence); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -#endif /* SCM_DEBUG_DEPRECATED == 0 */ - - -SCM_DEFINE (scm_redirect_port, "redirect-port", 2, 0, 0, - (SCM old, SCM new), - "This procedure takes two ports and duplicates the underlying file\n" - "descriptor from @var{old-port} into @var{new-port}. The\n" - "current file descriptor in @var{new-port} will be closed.\n" - "After the redirection the two ports will share a file position\n" - "and file status flags.\n\n" - "The return value is unspecified.\n\n" - "Unexpected behaviour can result if both ports are subsequently used\n" - "and the original and/or duplicate ports are buffered.\n\n" - "This procedure does not have any side effects on other ports or\n" - "revealed counts.") -#define FUNC_NAME s_scm_redirect_port -{ - int ans, oldfd, newfd; - struct scm_fport *fp; - - old = SCM_COERCE_OUTPORT (old); - new = SCM_COERCE_OUTPORT (new); - - SCM_VALIDATE_OPFPORT (1,old); - SCM_VALIDATE_OPFPORT (2,new); - oldfd = SCM_FPORT_FDES (old); - fp = SCM_FSTREAM (new); - newfd = fp->fdes; - if (oldfd != newfd) - { - scm_port *pt = SCM_PTAB_ENTRY (new); - scm_port *old_pt = SCM_PTAB_ENTRY (old); - scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (new)]; - - /* must flush to old fdes. */ - if (pt->rw_active == SCM_PORT_WRITE) - ptob->flush (new); - else if (pt->rw_active == SCM_PORT_READ) - scm_end_input (new); - ans = dup2 (oldfd, newfd); - if (ans == -1) - SCM_SYSERROR; - pt->rw_random = old_pt->rw_random; - /* continue using existing buffers, even if inappropriate. */ - } - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_dup_to_fdes, "dup->fdes", 1, 1, 0, - (SCM fd_or_port, SCM fd), - "Returns an integer file descriptor.") -#define FUNC_NAME s_scm_dup_to_fdes -{ - int oldfd, newfd, rv; - - fd_or_port = SCM_COERCE_OUTPORT (fd_or_port); - - if (SCM_INUMP (fd_or_port)) - oldfd = SCM_INUM (fd_or_port); - else - { - SCM_VALIDATE_OPFPORT (1,fd_or_port); - oldfd = SCM_FPORT_FDES (fd_or_port); - } - - if (SCM_UNBNDP (fd)) - { - newfd = dup (oldfd); - if (newfd == -1) - SCM_SYSERROR; - fd = SCM_MAKINUM (newfd); - } - else - { - SCM_VALIDATE_INUM_COPY (2, fd, newfd); - if (oldfd != newfd) - { - scm_evict_ports (newfd); /* see scsh manual. */ - rv = dup2 (oldfd, newfd); - if (rv == -1) - SCM_SYSERROR; - } - } - return fd; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_fileno, "fileno", 1, 0, 0, - (SCM port), - "Returns the integer file descriptor underlying @var{port}.\n" - "Does not change its revealed count.") -#define FUNC_NAME s_scm_fileno -{ - port = SCM_COERCE_OUTPORT (port); - SCM_VALIDATE_OPFPORT (1,port); - return SCM_MAKINUM (SCM_FPORT_FDES (port)); -} -#undef FUNC_NAME - -/* GJB:FIXME:: why does this not throw - an error if the arg is not a port? - This proc as is would be better names isattyport? - if it is not going to assume that the arg is a port */ -SCM_DEFINE (scm_isatty_p, "isatty?", 1, 0, 0, - (SCM port), - "Returns @code{#t} if @var{port} is using a serial\n" - "non-file device, otherwise @code{#f}.") -#define FUNC_NAME s_scm_isatty_p -{ - int rv; - - port = SCM_COERCE_OUTPORT (port); - - if (!SCM_OPFPORTP (port)) - return SCM_BOOL_F; - - rv = isatty (SCM_FPORT_FDES (port)); - return SCM_BOOL(rv); -} -#undef FUNC_NAME - - - -SCM_DEFINE (scm_fdopen, "fdopen", 2, 0, 0, - (SCM fdes, SCM modes), - "Returns a new port based on the file descriptor @var{fdes}.\n" - "Modes are given by the string @var{modes}. The revealed count of the port\n" - "is initialized to zero. The modes string is the same as that accepted\n" - "by @ref{File Ports, open-file}.") -#define FUNC_NAME s_scm_fdopen -{ - SCM_VALIDATE_INUM (1,fdes); - SCM_VALIDATE_ROSTRING (2,modes); - SCM_COERCE_SUBSTR (modes); - - return scm_fdes_to_port (SCM_INUM (fdes), SCM_ROCHARS (modes), SCM_BOOL_F); -} -#undef FUNC_NAME - - - -/* Move a port's underlying file descriptor to a given value. - * Returns #f if fdes is already the given value. - * #t if fdes moved. - * MOVE->FDES is implemented in Scheme and calls this primitive. - */ -SCM_DEFINE (scm_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, - (SCM port, SCM fd), - "Moves the underlying file descriptor for @var{port} to the integer\n" - "value @var{fdes} without changing the revealed count of @var{port}.\n" - "Any other ports already using this descriptor will be automatically\n" - "shifted to new descriptors and their revealed counts reset to zero.\n" - "The return value is @code{#f} if the file descriptor already had the\n" - "required value or @code{#t} if it was moved.") -#define FUNC_NAME s_scm_primitive_move_to_fdes -{ - struct scm_fport *stream; - int old_fd; - int new_fd; - int rv; - - port = SCM_COERCE_OUTPORT (port); - - SCM_VALIDATE_OPFPORT (1,port); - SCM_VALIDATE_INUM (2,fd); - stream = SCM_FSTREAM (port); - old_fd = stream->fdes; - new_fd = SCM_INUM (fd); - if (old_fd == new_fd) - { - return SCM_BOOL_F; - } - scm_evict_ports (new_fd); - rv = dup2 (old_fd, new_fd); - if (rv == -1) - SCM_SYSERROR; - stream->fdes = new_fd; - SCM_SYSCALL (close (old_fd)); - return SCM_BOOL_T; -} -#undef FUNC_NAME - -/* Return a list of ports using a given file descriptor. */ -SCM_DEFINE (scm_fdes_to_ports, "fdes->ports", 1, 0, 0, - (SCM fd), - "Returns a list of existing ports which have @var{fdes} as an\n" - "underlying file descriptor, without changing their revealed counts.") -#define FUNC_NAME s_scm_fdes_to_ports -{ - SCM result = SCM_EOL; - int int_fd; - int i; - - SCM_VALIDATE_INUM_COPY (1,fd,int_fd); - - for (i = 0; i < scm_port_table_size; i++) - { - if (SCM_OPFPORTP (scm_port_table[i]->port) - && ((struct scm_fport *) scm_port_table[i]->stream)->fdes == int_fd) - result = scm_cons (scm_port_table[i]->port, result); - } - return result; -} -#undef FUNC_NAME - - -void -scm_init_ioext () -{ - scm_add_feature ("i/o-extensions"); - -#include "libguile/ioext.x" -} - - -/* - Local Variables: - c-file-style: "gnu" - End: -*/ +/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + + + +#if HAVE_CONFIG_H +# include +#endif + +#include +#include + +#include "libguile/_scm.h" +#include "libguile/ioext.h" +#include "libguile/fports.h" +#include "libguile/feature.h" +#include "libguile/ports.h" +#include "libguile/strings.h" +#include "libguile/validate.h" + +#include + +#ifdef HAVE_IO_H +#include +#endif +#ifdef HAVE_UNISTD_H +#include +#endif + + +SCM_DEFINE (scm_ftell, "ftell", 1, 0, 0, + (SCM fd_port), + "Return an integer representing the current position of\n" + "@var{fd/port}, measured from the beginning. Equivalent to:\n" + "\n" + "@lisp\n" + "(seek port 0 SEEK_CUR)\n" + "@end lisp") +#define FUNC_NAME s_scm_ftell +{ + return scm_seek (fd_port, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_redirect_port, "redirect-port", 2, 0, 0, + (SCM old, SCM new), + "This procedure takes two ports and duplicates the underlying file\n" + "descriptor from @var{old-port} into @var{new-port}. The\n" + "current file descriptor in @var{new-port} will be closed.\n" + "After the redirection the two ports will share a file position\n" + "and file status flags.\n\n" + "The return value is unspecified.\n\n" + "Unexpected behaviour can result if both ports are subsequently used\n" + "and the original and/or duplicate ports are buffered.\n\n" + "This procedure does not have any side effects on other ports or\n" + "revealed counts.") +#define FUNC_NAME s_scm_redirect_port +{ + int ans, oldfd, newfd; + scm_t_fport *fp; + + old = SCM_COERCE_OUTPORT (old); + new = SCM_COERCE_OUTPORT (new); + + SCM_VALIDATE_OPFPORT (1, old); + SCM_VALIDATE_OPFPORT (2, new); + oldfd = SCM_FPORT_FDES (old); + fp = SCM_FSTREAM (new); + newfd = fp->fdes; + if (oldfd != newfd) + { + scm_t_port *pt = SCM_PTAB_ENTRY (new); + scm_t_port *old_pt = SCM_PTAB_ENTRY (old); + scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (new)]; + + /* must flush to old fdes. */ + if (pt->rw_active == SCM_PORT_WRITE) + ptob->flush (new); + else if (pt->rw_active == SCM_PORT_READ) + scm_end_input (new); + ans = dup2 (oldfd, newfd); + if (ans == -1) + SCM_SYSERROR; + pt->rw_random = old_pt->rw_random; + /* continue using existing buffers, even if inappropriate. */ + } + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_dup_to_fdes, "dup->fdes", 1, 1, 0, + (SCM fd_or_port, SCM fd), + "Return a new integer file descriptor referring to the open file\n" + "designated by @var{fd_or_port}, which must be either an open\n" + "file port or a file descriptor.") +#define FUNC_NAME s_scm_dup_to_fdes +{ + int oldfd, newfd, rv; + + fd_or_port = SCM_COERCE_OUTPORT (fd_or_port); + + if (SCM_INUMP (fd_or_port)) + oldfd = SCM_INUM (fd_or_port); + else + { + SCM_VALIDATE_OPFPORT (1, fd_or_port); + oldfd = SCM_FPORT_FDES (fd_or_port); + } + + if (SCM_UNBNDP (fd)) + { + newfd = dup (oldfd); + if (newfd == -1) + SCM_SYSERROR; + fd = SCM_MAKINUM (newfd); + } + else + { + SCM_VALIDATE_INUM_COPY (2, fd, newfd); + if (oldfd != newfd) + { + scm_evict_ports (newfd); /* see scsh manual. */ + rv = dup2 (oldfd, newfd); + if (rv == -1) + SCM_SYSERROR; + } + } + return fd; +} +#undef FUNC_NAME + + +SCM_DEFINE (scm_dup2, "dup2", 2, 0, 0, + (SCM oldfd, SCM newfd), + "A simple wrapper for the @code{dup2} system call.\n" + "Copies the file descriptor @var{oldfd} to descriptor\n" + "number @var{newfd}, replacing the previous meaning\n" + "of @var{newfd}. Both @var{oldfd} and @var{newfd} must\n" + "be integers.\n" + "Unlike for dup->fdes or primitive-move->fdes, no attempt\n" + "is made to move away ports which are using @var{newfd}.\n" + "The return value is unspecified.") +#define FUNC_NAME s_scm_dup2 +{ + int c_oldfd; + int c_newfd; + int rv; + + SCM_VALIDATE_INUM_COPY (1, oldfd, c_oldfd); + SCM_VALIDATE_INUM_COPY (2, newfd, c_newfd); + rv = dup2 (c_oldfd, c_newfd); + if (rv == -1) + SCM_SYSERROR; + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_fileno, "fileno", 1, 0, 0, + (SCM port), + "Return the integer file descriptor underlying @var{port}. Does\n" + "not change its revealed count.") +#define FUNC_NAME s_scm_fileno +{ + port = SCM_COERCE_OUTPORT (port); + SCM_VALIDATE_OPFPORT (1, port); + return SCM_MAKINUM (SCM_FPORT_FDES (port)); +} +#undef FUNC_NAME + +/* GJB:FIXME:: why does this not throw + an error if the arg is not a port? + This proc as is would be better names isattyport? + if it is not going to assume that the arg is a port + + [cmm] I don't see any problem with the above. why should a type + predicate assume _anything_ about its argument? +*/ +SCM_DEFINE (scm_isatty_p, "isatty?", 1, 0, 0, + (SCM port), + "Return @code{#t} if @var{port} is using a serial non--file\n" + "device, otherwise @code{#f}.") +#define FUNC_NAME s_scm_isatty_p +{ + int rv; + + port = SCM_COERCE_OUTPORT (port); + + if (!SCM_OPFPORTP (port)) + return SCM_BOOL_F; + + rv = isatty (SCM_FPORT_FDES (port)); + return SCM_BOOL(rv); +} +#undef FUNC_NAME + + + +SCM_DEFINE (scm_fdopen, "fdopen", 2, 0, 0, + (SCM fdes, SCM modes), + "Return a new port based on the file descriptor @var{fdes}.\n" + "Modes are given by the string @var{modes}. The revealed count\n" + "of the port is initialized to zero. The modes string is the\n" + "same as that accepted by @ref{File Ports, open-file}.") +#define FUNC_NAME s_scm_fdopen +{ + SCM_VALIDATE_INUM (1, fdes); + SCM_VALIDATE_STRING (2, modes); + + return scm_fdes_to_port (SCM_INUM (fdes), SCM_STRING_CHARS (modes), SCM_BOOL_F); +} +#undef FUNC_NAME + + + +/* Move a port's underlying file descriptor to a given value. + * Returns #f if fdes is already the given value. + * #t if fdes moved. + * MOVE->FDES is implemented in Scheme and calls this primitive. + */ +SCM_DEFINE (scm_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, + (SCM port, SCM fd), + "Moves the underlying file descriptor for @var{port} to the integer\n" + "value @var{fdes} without changing the revealed count of @var{port}.\n" + "Any other ports already using this descriptor will be automatically\n" + "shifted to new descriptors and their revealed counts reset to zero.\n" + "The return value is @code{#f} if the file descriptor already had the\n" + "required value or @code{#t} if it was moved.") +#define FUNC_NAME s_scm_primitive_move_to_fdes +{ + scm_t_fport *stream; + int old_fd; + int new_fd; + int rv; + + port = SCM_COERCE_OUTPORT (port); + + SCM_VALIDATE_OPFPORT (1, port); + SCM_VALIDATE_INUM (2, fd); + stream = SCM_FSTREAM (port); + old_fd = stream->fdes; + new_fd = SCM_INUM (fd); + if (old_fd == new_fd) + { + return SCM_BOOL_F; + } + scm_evict_ports (new_fd); + rv = dup2 (old_fd, new_fd); + if (rv == -1) + SCM_SYSERROR; + stream->fdes = new_fd; + SCM_SYSCALL (close (old_fd)); + return SCM_BOOL_T; +} +#undef FUNC_NAME + +/* Return a list of ports using a given file descriptor. */ +SCM_DEFINE (scm_fdes_to_ports, "fdes->ports", 1, 0, 0, + (SCM fd), + "Return a list of existing ports which have @var{fdes} as an\n" + "underlying file descriptor, without changing their revealed\n" + "counts.") +#define FUNC_NAME s_scm_fdes_to_ports +{ + SCM result = SCM_EOL; + int int_fd; + long i; + + SCM_VALIDATE_INUM_COPY (1, fd, int_fd); + + scm_mutex_lock (&scm_i_port_table_mutex); + for (i = 0; i < scm_i_port_table_size; i++) + { + if (SCM_OPFPORTP (scm_i_port_table[i]->port) + && ((scm_t_fport *) scm_i_port_table[i]->stream)->fdes == int_fd) + result = scm_cons (scm_i_port_table[i]->port, result); + } + scm_mutex_unlock (&scm_i_port_table_mutex); + return result; +} +#undef FUNC_NAME + + +void +scm_init_ioext () +{ + scm_add_feature ("i/o-extensions"); + +#include "libguile/ioext.x" +} + + +/* + Local Variables: + c-file-style: "gnu" + End: +*/