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/* Copyright (C) 2005-2012 by George Williams */
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <fontforge-config.h>
#include <intl.h>
#include <basics.h>
#include <pluginloading.h>
#include <string.h>
static int inited = false;
void init_plugins(void) {
int err;
if (!inited)
{
err = lt_dlinit();
if (1 < err)
{
fprintf(stderr, "%d errors encountered during libltdl startup.\n",
err);
abort();
}
else if (1 == err)
{
fprintf(stderr, "1 error encountered during libltdl startup.\n");
abort();
}
#ifdef PLUGINDIR
lt_dladdsearchdir(PLUGINDIR);
#endif /* PLUGINDIR */
inited = true;
}
}
int plugins_are_initialized(void) {
return inited;
}
/* Load (or fake loading) a named plugin that is somewhere in the path
* list for lt_dlopenext(). Optionally logs a message. Returns the
* plugin handle, or NULL. */
lt_dlhandle load_plugin(const char *dynamic_lib_name, void (*logger)(const char *fmt,...)) {
lt_dlhandle plugin;
int (*init)(void);
plugin = lt_dlopenext(dynamic_lib_name);
if ( plugin == NULL )
{
if (logger != NULL)
logger(_("Failed to dlopen: %s\n%s"), dynamic_lib_name, lt_dlerror());
}
else
{
init = (int (*)(void)) lt_dlsym(plugin,"FontForgeInit");
if ( init == NULL )
{
if (logger != NULL)
logger(_("Failed to find init function in %s"), dynamic_lib_name);
lt_dlclose(plugin);
plugin = NULL;
}
else if ( (*init)()==0 )
{ /* Init routine in charge of any
* error messages */
lt_dlclose(plugin);
plugin = NULL;
}
}
return plugin;
}