[bpt/guile.git] / libguile / load.c

/*	Copyright (C) 1995,1996 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.  */
\f

#include <stdio.h>
#include "_scm.h"
#include "libpath.h"
#include "fports.h"
#include "read.h"
#include "eval.h"
#include "throw.h"

#include "load.h"

#include <sys/types.h>
#include <sys/stat.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */

#ifndef R_OK
#define R_OK 4
#endif

\f
/* Loading a file, given an absolute filename.  */

/* Hook to run when we load a file, perhaps to announce the fact somewhere.
   Applied to the full name of the file.  */
static SCM *scm_loc_load_hook;

SCM_PROC(s_primitive_load, "primitive-load", 1, 0, 0, scm_primitive_load);
SCM 
scm_primitive_load (filename)
     SCM filename;
{
  SCM hook = *scm_loc_load_hook;
  SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename,
	      SCM_ARG1, s_primitive_load);
  SCM_ASSERT (hook == SCM_BOOL_F
	      || (scm_procedure_p (hook) == SCM_BOOL_T),
	      hook, "value of %load-hook is neither a procedure nor #f",
	      s_primitive_load);

  if (hook != SCM_BOOL_F)
    scm_apply (hook, scm_listify (filename, SCM_UNDEFINED), SCM_EOL);

  {
    SCM form, port;
    port = scm_open_file (filename,
			  scm_makfromstr ("r", (scm_sizet) sizeof (char), 0));
    while (1)
      {
	form = scm_read (port);
	if (SCM_EOF_VAL == form)
	  break;
	scm_eval_x (form);
      }
    scm_close_port (port);
  }
  return SCM_UNSPECIFIED;
}

\f
/* Builtin path to scheme library files. */
#ifdef SCM_PKGDATA_DIR
SCM_PROC (s_sys_package_data_dir, "%package-data-dir", 0, 0, 0, scm_sys_package_data_dir);
SCM
scm_sys_package_data_dir ()
{
  return scm_makfrom0str (SCM_PKGDATA_DIR);
}
#endif /* SCM_PKGDATA_DIR */

\f
/* Initializing the load path, and searching it.  */

/* List of names of directories we search for files to load.  */
static SCM *scm_loc_load_path;

/* List of extensions we try adding to the filenames.  */
static SCM *scm_loc_load_extensions;

/* Initialize the global variable %load-path, given the value of the
   SCM_SITE_DIR and SCM_LIBRARY_DIR preprocessor symbols and the
   SCHEME_LOAD_PATH environment variable.  */
void
scm_init_load_path ()
{
  SCM path = SCM_EOL;

#ifdef SCM_LIBRARY_DIR
  path = scm_listify (scm_makfrom0str (SCM_SITE_DIR),
		      scm_makfrom0str (SCM_LIBRARY_DIR),
		      scm_makfrom0str (SCM_PKGDATA_DIR),
		      SCM_UNDEFINED);
#endif /* SCM_LIBRARY_DIR */
  
  {
    char *path_string = getenv ("SCHEME_LOAD_PATH");

    if (path_string && path_string[0] != '\0')
      {
	char *scan, *elt_end;

	/* Scan backwards from the end of the string, to help
           construct the list in the right order.  */
	scan = elt_end = path_string + strlen (path_string);
	do {
	  /* Scan back to the beginning of the current element.  */
	  do scan--;
	  while (scan >= path_string && *scan != ':');
	  path = scm_cons (scm_makfromstr (scan + 1, elt_end - (scan + 1), 0),
			   path);
	  elt_end = scan;
	} while (scan >= path_string);
      }
  }

  *scm_loc_load_path = path;
}


/* Search %load-path for a directory containing a file named FILENAME.
   The file must be readable, and not a directory.
   If we find one, return its full filename; otherwise, return #f.
   If FILENAME is absolute, return it unchanged.  */
SCM_PROC(s_sys_search_load_path, "%search-load-path", 1, 0, 0, scm_sys_search_load_path);
SCM 
scm_sys_search_load_path (filename)
     SCM filename;
{
  SCM path = *scm_loc_load_path;
  SCM exts = *scm_loc_load_extensions;
  char *buf;
  int filename_len;
  int max_path_len;
  int max_ext_len;

  SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename,
	      SCM_ARG1, s_sys_search_load_path);
  SCM_ASSERT (scm_ilength (path) >= 0, path, "load path is not a proper list",
	      s_sys_search_load_path);
  SCM_ASSERT (scm_ilength (exts) >= 0, exts,
	      "load extension list is not a proper list",
	      s_sys_search_load_path);
  filename_len = SCM_ROLENGTH (filename);

  /* If FILENAME is absolute, return it unchanged.  */
  if (filename_len >= 1
      && SCM_ROCHARS (filename)[0] == '/')
    return filename;

  /* Find the length of the longest element of path.  */
  {
    SCM walk;

    max_path_len = 0;
    for (walk = path; SCM_NIMP (walk); walk = SCM_CDR (walk))
      {
	SCM elt = SCM_CAR (walk);
	SCM_ASSERT (SCM_NIMP (elt) && SCM_ROSTRINGP (elt), elt,
		    "load path is not a list of strings",
		    s_sys_search_load_path);
	if (SCM_LENGTH (elt) > max_path_len)
	  max_path_len = SCM_LENGTH (elt);
      }
  }

  /* Find the length of the longest element of the load extensions
     list.  */
  {
    SCM walk;

    max_ext_len = 0;
    for (walk = exts; SCM_NIMP (walk); walk = SCM_CDR (walk))
      {
	SCM elt = SCM_CAR (walk);
	SCM_ASSERT (SCM_NIMP (elt) && SCM_ROSTRINGP (elt), elt,
		    "load extension list is not a list of strings",
		    s_sys_search_load_path);
	if (SCM_LENGTH (elt) > max_ext_len)
	  max_ext_len = SCM_LENGTH (elt);
      }
  }

  SCM_DEFER_INTS;

  buf = scm_must_malloc (max_path_len + 1 + filename_len + max_ext_len + 1,
			 s_sys_search_load_path);

  /* Try every path element.  At this point, we know it's a proper
     list of strings.  */
  for (; SCM_NIMP (path); path = SCM_CDR (path))
    {
      SCM path_elt = SCM_CAR (path);

      /* Try every extension.  At this point, we know it's a proper
         list of strings.  */
      for (exts = *scm_loc_load_extensions;
	   SCM_NIMP (exts);
	   exts = SCM_CDR (exts))
	{
	  SCM ext_elt = SCM_CAR (exts);
	  int i;

	  /* Concatenate the path name, the filename, and the extension. */
	  i = SCM_ROLENGTH (path_elt);
	  memcpy (buf, SCM_ROCHARS (path_elt), i);
	  if (i >= 1 && buf[i - 1] != '/')
	    buf[i++] = '/';
	  memcpy (buf + i, SCM_ROCHARS (filename), filename_len);
	  i += filename_len;
	  memcpy (buf + i, SCM_ROCHARS (ext_elt), SCM_LENGTH (ext_elt));
	  i += SCM_LENGTH (ext_elt);
	  buf[i] = '\0';

	  {
	    struct stat mode;

	    if (stat (buf, &mode) >= 0
		&& ! (mode.st_mode & S_IFDIR)
		&& access (buf, R_OK) == 0)
	      {
		SCM result = scm_makfromstr (buf, i, 0);
		scm_must_free (buf);
		SCM_ALLOW_INTS;
		return result;
	      }
	  }
	}
    }
  
  scm_must_free (buf);
  SCM_ALLOW_INTS;
  return SCM_BOOL_F;
}


SCM_PROC(s_primitive_load_path, "primitive-load-path", 1, 0, 0, scm_primitive_load_path);
SCM 
scm_primitive_load_path (filename)
     SCM filename;
{
  SCM full_filename;

  SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename,
	      SCM_ARG1, s_primitive_load_path);

  full_filename = scm_sys_search_load_path (filename);

  if (SCM_FALSEP (full_filename))
    {
      int absolute = (SCM_LENGTH (filename) >= 1
		      && SCM_ROCHARS (filename)[0] == '/');
      scm_misc_error (s_primitive_load_path,
		      (absolute
		       ? "Unable to load file %S"
		       : "Unable to find file %S in load path"),
		      scm_listify (filename, SCM_UNDEFINED));
    }

  return scm_primitive_load (full_filename);
}

/* The following function seems trivial - and indeed it is.  Its
 * existence is motivated by its ability to evaluate expressions
 * without copying them first (as is done in "eval").
 */

SCM_SYMBOL (scm_end_of_file_key, "end-of-file");

SCM_PROC (s_read_and_eval_x, "read-and-eval!", 0, 1, 0, scm_read_and_eval_x);

SCM
scm_read_and_eval_x (port)
     SCM port;
{
  SCM form = scm_read (port);
  if (form == SCM_EOF_VAL)
    scm_ithrow (scm_end_of_file_key, SCM_EOL, 1);
  return scm_eval_x (form);
}

\f

void
scm_init_load ()
{
  scm_loc_load_path = SCM_CDRLOC(scm_sysintern("%load-path", SCM_EOL));
  scm_loc_load_extensions
    = SCM_CDRLOC(scm_sysintern("%load-extensions",
			       scm_listify (scm_makfrom0str (""),
					    scm_makfrom0str (".scm"),
					    SCM_UNDEFINED)));
  scm_loc_load_hook = SCM_CDRLOC(scm_sysintern("%load-hook", SCM_BOOL_F));

#include "load.x"
}
Commit	Line	Data
0f2d19dd JB	1	/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
	2	*
	3	* This program is free software; you can redistribute it and/or modify
	4	* it under the terms of the GNU General Public License as published by
	5	* the Free Software Foundation; either version 2, or (at your option)
	6	* any later version.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this software; see the file COPYING. If not, write to
82892bed JB	15	* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
82892bed JB	16	* Boston, MA 02111-1307 USA
0f2d19dd JB	17	*
	18	* As a special exception, the Free Software Foundation gives permission
	19	* for additional uses of the text contained in its release of GUILE.
	20	*
	21	* The exception is that, if you link the GUILE library with other files
	22	* to produce an executable, this does not by itself cause the
	23	* resulting executable to be covered by the GNU General Public License.
	24	* Your use of that executable is in no way restricted on account of
	25	* linking the GUILE library code into it.
	26	*
	27	* This exception does not however invalidate any other reasons why
	28	* the executable file might be covered by the GNU General Public License.
	29	*
	30	* This exception applies only to the code released by the
	31	* Free Software Foundation under the name GUILE. If you copy
	32	* code from other Free Software Foundation releases into a copy of
	33	* GUILE, as the General Public License permits, the exception does
	34	* not apply to the code that you add in this way. To avoid misleading
	35	* anyone as to the status of such modified files, you must delete
	36	* this exception notice from them.
	37	*
	38	* If you write modifications of your own for GUILE, it is your choice
	39	* whether to permit this exception to apply to your modifications.
82892bed	40	* If you do not wish that, delete this exception notice. */
0f2d19dd JB	41	\f
	42
	43	#include <stdio.h>
	44	#include "_scm.h"
06721500	45	#include "libpath.h"
20e6290e JB	46	#include "fports.h"
	47	#include "read.h"
	48	#include "eval.h"
b35d06a4	49	#include "throw.h"
20e6290e JB	50
20e6290e JB	51	#include "load.h"
06721500 JB	52
	53	#include <sys/types.h>
	54	#include <sys/stat.h>
	55
	56	#ifdef HAVE_UNISTD_H
	57	#include <unistd.h>
	58	#endif /* HAVE_UNISTD_H */
	59
	60	#ifndef R_OK
	61	#define R_OK 4
	62	#endif
0f2d19dd JB	63
0f2d19dd JB	64	\f
06721500	65	/* Loading a file, given an absolute filename. */
0f2d19dd	66
26544b96 JB	67	/* Hook to run when we load a file, perhaps to announce the fact somewhere.
	68	Applied to the full name of the file. */
	69	static SCM *scm_loc_load_hook;
	70
deca31e1	71	SCM_PROC(s_primitive_load, "primitive-load", 1, 0, 0, scm_primitive_load);
0f2d19dd	72	SCM
deca31e1	73	scm_primitive_load (filename)
0f2d19dd	74	SCM filename;
0f2d19dd	75	{
26544b96	76	SCM hook = *scm_loc_load_hook;
06721500	77	SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename,
523f5266	78	SCM_ARG1, s_primitive_load);
26544b96 JB	79	SCM_ASSERT (hook == SCM_BOOL_F
	80	\|\| (scm_procedure_p (hook) == SCM_BOOL_T),
	81	hook, "value of %load-hook is neither a procedure nor #f",
	82	s_primitive_load);
	83
	84	if (hook != SCM_BOOL_F)
	85	scm_apply (hook, scm_listify (filename, SCM_UNDEFINED), SCM_EOL);
	86
0f2d19dd JB	87	{
	88	SCM form, port;
	89	port = scm_open_file (filename,
	90	scm_makfromstr ("r", (scm_sizet) sizeof (char), 0));
0f2d19dd JB	91	while (1)
0f2d19dd JB	92	{
deca31e1	93	form = scm_read (port);
0f2d19dd JB	94	if (SCM_EOF_VAL == form)
	95	break;
	96	scm_eval_x (form);
	97	}
	98	scm_close_port (port);
	99	}
b59b97ba	100	return SCM_UNSPECIFIED;
0f2d19dd JB	101	}
	102
	103	\f
3feedb00 MD	104	/* Builtin path to scheme library files. */
	105	#ifdef SCM_PKGDATA_DIR
	106	SCM_PROC (s_sys_package_data_dir, "%package-data-dir", 0, 0, 0, scm_sys_package_data_dir);
	107	SCM
	108	scm_sys_package_data_dir ()
	109	{
	110	return scm_makfrom0str (SCM_PKGDATA_DIR);
	111	}
	112	#endif /* SCM_PKGDATA_DIR */
	113
	114	\f
06721500	115	/* Initializing the load path, and searching it. */
0f2d19dd	116
26544b96	117	/* List of names of directories we search for files to load. */
06721500 JB	118	static SCM *scm_loc_load_path;
06721500 JB	119
26544b96 JB	120	/* List of extensions we try adding to the filenames. */
	121	static SCM *scm_loc_load_extensions;
	122
06721500	123	/* Initialize the global variable %load-path, given the value of the
3feedb00 MD	124	SCM_SITE_DIR and SCM_LIBRARY_DIR preprocessor symbols and the
3feedb00 MD	125	SCHEME_LOAD_PATH environment variable. */
0f2d19dd	126	void
06721500 JB	127	scm_init_load_path ()
	128	{
	129	SCM path = SCM_EOL;
	130
3feedb00	131	#ifdef SCM_LIBRARY_DIR
55407879 TP	132	path = scm_listify (scm_makfrom0str (SCM_SITE_DIR),
	133	scm_makfrom0str (SCM_LIBRARY_DIR),
	134	scm_makfrom0str (SCM_PKGDATA_DIR),
	135	SCM_UNDEFINED);
3feedb00	136	#endif /* SCM_LIBRARY_DIR */
06721500 JB	137
	138	{
	139	char *path_string = getenv ("SCHEME_LOAD_PATH");
	140
	141	if (path_string && path_string[0] != '\0')
	142	{
	143	char scan, elt_end;
	144
	145	/* Scan backwards from the end of the string, to help
	146	construct the list in the right order. */
	147	scan = elt_end = path_string + strlen (path_string);
	148	do {
	149	/* Scan back to the beginning of the current element. */
	150	do scan--;
	151	while (scan >= path_string && *scan != ':');
	152	path = scm_cons (scm_makfromstr (scan + 1, elt_end - (scan + 1), 0),
	153	path);
	154	elt_end = scan;
	155	} while (scan >= path_string);
	156	}
	157	}
	158
	159	*scm_loc_load_path = path;
	160	}
	161
	162
	163	/* Search %load-path for a directory containing a file named FILENAME.
	164	The file must be readable, and not a directory.
26544b96 JB	165	If we find one, return its full filename; otherwise, return #f.
26544b96 JB	166	If FILENAME is absolute, return it unchanged. */
06721500 JB	167	SCM_PROC(s_sys_search_load_path, "%search-load-path", 1, 0, 0, scm_sys_search_load_path);
	168	SCM
	169	scm_sys_search_load_path (filename)
	170	SCM filename;
	171	{
	172	SCM path = *scm_loc_load_path;
26544b96	173	SCM exts = *scm_loc_load_extensions;
06721500	174	char *buf;
06721500	175	int filename_len;
26544b96 JB	176	int max_path_len;
26544b96 JB	177	int max_ext_len;
06721500 JB	178
	179	SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename,
	180	SCM_ARG1, s_sys_search_load_path);
26544b96 JB	181	SCM_ASSERT (scm_ilength (path) >= 0, path, "load path is not a proper list",
	182	s_sys_search_load_path);
	183	SCM_ASSERT (scm_ilength (exts) >= 0, exts,
	184	"load extension list is not a proper list",
	185	s_sys_search_load_path);
06721500 JB	186	filename_len = SCM_ROLENGTH (filename);
06721500 JB	187
26544b96 JB	188	/* If FILENAME is absolute, return it unchanged. */
	189	if (filename_len >= 1
	190	&& SCM_ROCHARS (filename)[0] == '/')
	191	return filename;
	192
	193	/* Find the length of the longest element of path. */
	194	{
	195	SCM walk;
	196
	197	max_path_len = 0;
	198	for (walk = path; SCM_NIMP (walk); walk = SCM_CDR (walk))
	199	{
	200	SCM elt = SCM_CAR (walk);
	201	SCM_ASSERT (SCM_NIMP (elt) && SCM_ROSTRINGP (elt), elt,
	202	"load path is not a list of strings",
	203	s_sys_search_load_path);
	204	if (SCM_LENGTH (elt) > max_path_len)
	205	max_path_len = SCM_LENGTH (elt);
	206	}
	207	}
	208
	209	/* Find the length of the longest element of the load extensions
	210	list. */
	211	{
	212	SCM walk;
	213
	214	max_ext_len = 0;
	215	for (walk = exts; SCM_NIMP (walk); walk = SCM_CDR (walk))
	216	{
	217	SCM elt = SCM_CAR (walk);
	218	SCM_ASSERT (SCM_NIMP (elt) && SCM_ROSTRINGP (elt), elt,
	219	"load extension list is not a list of strings",
	220	s_sys_search_load_path);
	221	if (SCM_LENGTH (elt) > max_ext_len)
	222	max_ext_len = SCM_LENGTH (elt);
	223	}
	224	}
	225
06721500 JB	226	SCM_DEFER_INTS;
06721500 JB	227
26544b96 JB	228	buf = scm_must_malloc (max_path_len + 1 + filename_len + max_ext_len + 1,
26544b96 JB	229	s_sys_search_load_path);
06721500	230
26544b96 JB	231	/* Try every path element. At this point, we know it's a proper
	232	list of strings. */
	233	for (; SCM_NIMP (path); path = SCM_CDR (path))
06721500	234	{
26544b96 JB	235	SCM path_elt = SCM_CAR (path);
	236
	237	/* Try every extension. At this point, we know it's a proper
	238	list of strings. */
	239	for (exts = *scm_loc_load_extensions;
	240	SCM_NIMP (exts);
	241	exts = SCM_CDR (exts))
06721500	242	{
26544b96 JB	243	SCM ext_elt = SCM_CAR (exts);
	244	int i;
	245
	246	/* Concatenate the path name, the filename, and the extension. */
	247	i = SCM_ROLENGTH (path_elt);
	248	memcpy (buf, SCM_ROCHARS (path_elt), i);
b35d06a4 MD	249	if (i >= 1 && buf[i - 1] != '/')
b35d06a4 MD	250	buf[i++] = '/';
26544b96 JB	251	memcpy (buf + i, SCM_ROCHARS (filename), filename_len);
	252	i += filename_len;
	253	memcpy (buf + i, SCM_ROCHARS (ext_elt), SCM_LENGTH (ext_elt));
	254	i += SCM_LENGTH (ext_elt);
	255	buf[i] = '\0';
06721500 JB	256
	257	{
	258	struct stat mode;
	259
	260	if (stat (buf, &mode) >= 0
	261	&& ! (mode.st_mode & S_IFDIR)
	262	&& access (buf, R_OK) == 0)
	263	{
26544b96	264	SCM result = scm_makfromstr (buf, i, 0);
06721500 JB	265	scm_must_free (buf);
	266	SCM_ALLOW_INTS;
	267	return result;
	268	}
	269	}
	270	}
06721500 JB	271	}
	272
	273	scm_must_free (buf);
	274	SCM_ALLOW_INTS;
	275	return SCM_BOOL_F;
	276	}
	277
	278
deca31e1	279	SCM_PROC(s_primitive_load_path, "primitive-load-path", 1, 0, 0, scm_primitive_load_path);
06721500	280	SCM
deca31e1	281	scm_primitive_load_path (filename)
06721500	282	SCM filename;
06721500	283	{
26544b96 JB	284	SCM full_filename;
	285
	286	SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename,
	287	SCM_ARG1, s_primitive_load_path);
	288
	289	full_filename = scm_sys_search_load_path (filename);
	290
dbece3a2 GH	291	if (SCM_FALSEP (full_filename))
dbece3a2 GH	292	{
26544b96 JB	293	int absolute = (SCM_LENGTH (filename) >= 1
26544b96 JB	294	&& SCM_ROCHARS (filename)[0] == '/');
523f5266	295	scm_misc_error (s_primitive_load_path,
26544b96 JB	296	(absolute
	297	? "Unable to load file %S"
	298	: "Unable to find file %S in load path"),
	299	scm_listify (filename, SCM_UNDEFINED));
dbece3a2	300	}
26544b96	301
deca31e1	302	return scm_primitive_load (full_filename);
06721500 JB	303	}
06721500 JB	304
b35d06a4 MD	305	/* The following function seems trivial - and indeed it is. Its
	306	* existence is motivated by its ability to evaluate expressions
	307	* without copying them first (as is done in "eval").
	308	*/
	309
	310	SCM_SYMBOL (scm_end_of_file_key, "end-of-file");
	311
deca31e1	312	SCM_PROC (s_read_and_eval_x, "read-and-eval!", 0, 1, 0, scm_read_and_eval_x);
b35d06a4 MD	313
b35d06a4 MD	314	SCM
deca31e1	315	scm_read_and_eval_x (port)
b35d06a4	316	SCM port;
b35d06a4	317	{
deca31e1	318	SCM form = scm_read (port);
b35d06a4 MD	319	if (form == SCM_EOF_VAL)
	320	scm_ithrow (scm_end_of_file_key, SCM_EOL, 1);
	321	return scm_eval_x (form);
	322	}
	323
06721500 JB	324	\f
06721500 JB	325
0f2d19dd JB	326	void
0f2d19dd JB	327	scm_init_load ()
0f2d19dd	328	{
25d8012c	329	scm_loc_load_path = SCM_CDRLOC(scm_sysintern("%load-path", SCM_EOL));
26544b96 JB	330	scm_loc_load_extensions
	331	= SCM_CDRLOC(scm_sysintern("%load-extensions",
	332	scm_listify (scm_makfrom0str (""),
	333	scm_makfrom0str (".scm"),
	334	SCM_UNDEFINED)));
	335	scm_loc_load_hook = SCM_CDRLOC(scm_sysintern("%load-hook", SCM_BOOL_F));
06721500	336
0f2d19dd JB	337	#include "load.x"
0f2d19dd JB	338	}