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author | Marius Vollmer <mvo@zagadka.de> | 1996-12-08 16:52:38 +0000 |
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committer | Marius Vollmer <mvo@zagadka.de> | 1996-12-08 16:52:38 +0000 |
commit | 1edae07624597d3a545e95d2090b2137f0304e81 (patch) | |
tree | e7f8c1f5b75af9224e0bec401213c7c9393d87f6 /libguile/dynl.c | |
parent | 708ac61f7788574a14ff5de253ab0087f8531d81 (diff) | |
download | guile-1edae07624597d3a545e95d2090b2137f0304e81.tar.gz |
Initial revision
Diffstat (limited to 'libguile/dynl.c')
-rw-r--r-- | libguile/dynl.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/libguile/dynl.c b/libguile/dynl.c new file mode 100644 index 000000000..800de3d7b --- /dev/null +++ b/libguile/dynl.c @@ -0,0 +1,147 @@ +/* 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 |