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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "internal.h"
#include "rcchome.h"
#include "plugin.h"
#ifdef RCC_PLUGINS
# include <dlfcn.h>
# ifndef RTLD_NOW
# define RTLD_NOW 0
# endif
#endif /* RCC_PLUGINS */
rcc_library_handle rccLibraryOpen(char *filename)
{
#ifdef RCC_PLUGINS
if (filename) return (rcc_library_handle)dlopen(filename, RTLD_NOW);
#endif /* RCC_PLUGINS */
return NULL;
}
void rccLibraryClose(rcc_library_handle handle)
{
#ifdef RCC_PLUGINS
if (handle) dlclose(handle);
#endif /* RCC_PLUGINS */
}
void* rccLibraryFind(rcc_library_handle handle, const char *symbol)
{
#ifdef RCC_PLUGINS
if ((handle)||(symbol)) return dlsym(handle, symbol);
#endif /* RCC_PLUGINS */
return NULL;
}
static rcc_plugin_handle_s rcc_engine_handles[RCC_MAX_PLUGINS];
int rccPluginInit() {
unsigned int i;
for (i=0;i<RCC_MAX_PLUGINS;i++)
rcc_engine_handles[i].sn = NULL;
return 0;
}
void rccPluginFree() {
unsigned int i;
for (i=0;i<RCC_MAX_PLUGINS;i++)
if (rcc_engine_handles[i].sn) {
rccLibraryClose(rcc_engine_handles[i].handle);
free(rcc_engine_handles[i].sn);
rcc_engine_handles[i].sn = NULL;
}
}
rcc_plugin_handle rccPluginGetHandleByName(rcc_plugin_type type, const char *name) {
unsigned int i;
rcc_plugin_handle handles;
if (!name) return NULL;
switch(type) {
case RCC_PLUGIN_TYPE_ENGINE:
handles = rcc_engine_handles;
break;
default:
return NULL;
}
for (i=0;i<RCC_MAX_PLUGINS;i++)
if ((handles[i].sn)&&(!strcasecmp(handles[i].sn, name))) return handles+i;
return NULL;
}
rcc_plugin_handle rccPluginGetFreeHandle(rcc_plugin_type type) {
unsigned int i;
rcc_plugin_handle handles;
switch(type) {
case RCC_PLUGIN_TYPE_ENGINE:
handles = rcc_engine_handles;
break;
default:
return NULL;
}
for (i=0;i<RCC_MAX_PLUGINS;i++)
if (!handles[i].sn) return handles+i;
return NULL;
}
rcc_plugin_handle rccPluginLoad(rcc_plugin_type type, const char *name) {
#ifdef RCC_PLUGINS
void *res;
void *infofunc;
char *pluginfn;
rcc_plugin_handle plugin;
if (!name) return NULL;
plugin = rccPluginGetHandleByName(type, name);
if (plugin) return plugin;
plugin = rccPluginGetFreeHandle(type);
if (!plugin) return plugin;
switch (type) {
case RCC_PLUGIN_TYPE_ENGINE:
pluginfn = (char*)malloc((48 + strlen(rcc_home_dir) + strlen(name))*sizeof(char));
if (!pluginfn) return NULL;
sprintf(pluginfn, "%s/.rcc/engines/%s_engine.so", rcc_home_dir, name);
res = rccLibraryOpen(pluginfn);
if (!res) {
sprintf(pluginfn, LIBRCC_DATA_DIR "/engines/%s_engine.so", name);
res = rccLibraryOpen(pluginfn);
}
free(pluginfn);
if (res) {
infofunc = rccLibraryFind(res, "rccGetInfo");
if (infofunc) {
plugin->sn = strdup(name);
if (plugin->sn) {
plugin->handle = (rcc_library_handle)res;
plugin->info_function = infofunc;
return plugin;
} else rccLibraryClose(res);
} else rccLibraryClose(res);
}
break;
default:
return NULL;
}
#endif /* RCC_PLUGINS */
return NULL;
}
rcc_engine *rccPluginEngineGetInfo(const char *name, const char *language) {
rcc_plugin_handle handle;
rcc_plugin_engine_info_function infofunc;
handle = rccPluginLoad(RCC_PLUGIN_TYPE_ENGINE, name);
if (!handle) return NULL;
infofunc = (rcc_plugin_engine_info_function)(handle->info_function);
if (!infofunc) return NULL;
return infofunc(language);
}
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