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authorMarius Vollmer <mvo@zagadka.de>1996-12-08 16:52:38 +0000
committerMarius Vollmer <mvo@zagadka.de>1996-12-08 16:52:38 +0000
commit1edae07624597d3a545e95d2090b2137f0304e81 (patch)
treee7f8c1f5b75af9224e0bec401213c7c9393d87f6 /libguile/dynl.c
parent708ac61f7788574a14ff5de253ab0087f8531d81 (diff)
downloadguile-1edae07624597d3a545e95d2090b2137f0304e81.tar.gz
Initial revision
Diffstat (limited to 'libguile/dynl.c')
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diff --git a/libguile/dynl.c b/libguile/dynl.c
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+/* dynl.c - dynamic linking
+ *
+ * Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 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, 675 Mass Ave, Cambridge, MA 02139, 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.
+ */
+
+/* "dynl.c" dynamically link&load object files.
+ Author: Aubrey Jaffer
+ Modified for libguile by Marius Vollmer */
+
+#include "_scm.h"
+
+/* Converting a list of SCM strings into a argv-style array. You must
+ have ints disabled for the whole lifetime of the created argv (from
+ before MAKE_ARGV_FROM_STRINGLIST until after
+ MUST_FREE_ARGV). Atleast this is was the documentation for
+ MAKARGVFROMSTRS says, it isn't really used that way.
+
+ This code probably belongs into strings.c */
+
+static char **scm_make_argv_from_stringlist SCM_P ((SCM args, int *argcp,
+ char *subr, int argn));
+
+static char **
+scm_make_argv_from_stringlist (args, argcp, subr, argn)
+ SCM args;
+ int *argcp;
+ char *subr;
+ int argn;
+{
+ char **argv;
+ int argc, i;
+
+ argc = scm_ilength(args);
+ argv = (char **) scm_must_malloc ((1L+argc)*sizeof(char *), subr);
+ for(i = 0; SCM_NNULLP (args); args = SCM_CDR (args), i++) {
+ size_t len;
+ char *dst, *src;
+ SCM str = SCM_CAR (args);
+
+ SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, argn, subr);
+ len = 1 + SCM_ROLENGTH (str);
+ dst = (char *) scm_must_malloc ((long)len, subr);
+ src = SCM_ROCHARS (str);
+ while (len--)
+ dst[len] = src[len];
+ argv[i] = dst;
+ }
+
+ if (argcp)
+ *argcp = argc;
+ argv[argc] = 0;
+ return argv;
+}
+
+static void scm_must_free_argv SCM_P ((char **argv));
+
+static void
+scm_must_free_argv(argv)
+ char **argv;
+{
+ char **av = argv;
+ while(!(*av))
+ free(*(av++));
+ free(argv);
+}
+
+/* Coerce an arbitrary readonly-string into a zero-terminated string.
+ */
+
+static SCM scm_coerce_rostring SCM_P ((SCM rostr, char *subr, int argn));
+
+static SCM
+scm_coerce_rostring (rostr, subr, argn)
+ SCM rostr;
+ char *subr;
+ int argn;
+{
+ SCM_ASSERT (SCM_NIMP (rostr) && SCM_ROSTRINGP (rostr), rostr, argn, subr);
+ if (SCM_SUBSTRP (rostr))
+ rostr = scm_makfromstr (SCM_ROCHARS (rostr), SCM_ROLENGTH (rostr), 0);
+ return rostr;
+}
+
+/* Dispatch to the system dependent files
+ */
+
+#ifdef DYNAMIC_LINKING
+#ifdef HAVE_LIBDL
+#include "dynl-dl.c"
+#else
+#ifdef HAVE_SHL_LOAD
+#include "dynl-shl.c"
+#else
+#ifdef HAVE_DLD
+#include "dynl-dld.c"
+#else /* no dynamic linking available */
+void
+scm_init_dynamic_linking ()
+{
+}
+#endif
+#endif
+#endif
+#else /* dynamic linking disabled */
+void
+scm_init_dynamic_linking ()
+{
+}
+#endif