101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/*
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* Copyright 2003 by MIT Student Information Processing Board
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose is hereby granted, provided that
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* the names of M.I.T. and the M.I.T. S.I.P.B. not be used in
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* advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. M.I.T. and the
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* M.I.T. S.I.P.B. make no representations about the suitability of
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* this software for any purpose. It is provided "as is" without
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* express or implied warranty.
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*/
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#include "config.h"
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#ifdef HAS_STDLIB_H
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#include <stdlib.h>
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#endif
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#include "ss_internal.h"
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#define size sizeof(ss_data *)
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#ifdef HAVE_DLOPEN
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#include <dlfcn.h>
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#endif
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#ifdef HAVE_DLOPEN
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static void ss_release_readline(ss_data *info)
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{
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if (!info->readline_handle)
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return;
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info->readline = 0;
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info->add_history = 0;
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info->redisplay = 0;
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info->rl_completion_matches = 0;
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dlclose(info->readline_handle);
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info->readline_handle = 0;
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}
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#endif
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/* Libraries we will try to use for readline/editline functionality */
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#define DEFAULT_LIBPATH "libreadline.so.7:libreadline.so.6:libreadline.so.5:libreadline.so.4:libreadline.so:libedit.so.2:libedit.so:libeditline.so.0:libeditline.so"
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#ifdef HAVE_DLOPEN
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void ss_get_readline(int sci_idx)
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{
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void *handle = NULL;
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ss_data *info = ss_info(sci_idx);
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const char **t, *libpath = 0;
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char *tmp, *cp, *next;
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char **(**completion_func)(const char *, int, int);
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if (info->readline_handle)
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return;
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libpath = ss_safe_getenv("SS_READLINE_PATH");
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if (!libpath)
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libpath = DEFAULT_LIBPATH;
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if (*libpath == 0 || !strcmp(libpath, "none"))
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return;
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tmp = malloc(strlen(libpath)+1);
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if (!tmp)
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return;
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strcpy(tmp, libpath);
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for (cp = tmp; cp; cp = next) {
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next = strchr(cp, ':');
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if (next)
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*next++ = 0;
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if (*cp == 0)
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continue;
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if ((handle = dlopen(cp, RTLD_NOW))) {
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/* printf("Using %s for readline library\n", cp); */
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break;
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}
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}
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free(tmp);
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if (!handle)
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return;
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info->readline_handle = handle;
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info->readline = (char *(*)(const char *))
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dlsym(handle, "readline");
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info->add_history = (void (*)(const char *))
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dlsym(handle, "add_history");
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info->redisplay = (void (*)(void))
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dlsym(handle, "rl_forced_update_display");
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info->rl_completion_matches = (char **(*)(const char *,
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char *(*)(const char *, int)))
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dlsym(handle, "rl_completion_matches");
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if ((t = dlsym(handle, "rl_readline_name")) != NULL)
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*t = info->subsystem_name;
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if ((completion_func =
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dlsym(handle, "rl_attempted_completion_function")) != NULL)
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*completion_func = ss_rl_completion;
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info->readline_shutdown = ss_release_readline;
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}
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#else
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void ss_get_readline(int sci_idx __SS_ATTR((unused)))
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{
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}
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#endif
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