static int start(void *d) {
plugin_data_t *data = d;
cp_extension_t **exts;
exts = cp_get_extensions_info(data->ctx, "symuser.strings", NULL, NULL);
if (exts != NULL && exts[0] != NULL) {
const char *symname;
symname = cp_lookup_cfg_value(exts[0]->configuration, "@string-symbol");
if (symname != NULL) {
data->str = cp_resolve_symbol(data->ctx, exts[0]->plugin->identifier, symname, NULL);
if (data->str == NULL) {
cp_log(data->ctx, CP_LOG_ERROR, "Could not resolve symbol specified by extension.");
}
} else {
cp_log(data->ctx, CP_LOG_ERROR, "No string-symbol attribute present in extension.");
}
} else {
cp_log(data->ctx, CP_LOG_ERROR, "No extensions available.");
}
if (exts != NULL) {
cp_release_info(data->ctx, exts);
}
if (data->str == NULL) {
return CP_ERR_RUNTIME;
}
return cp_define_symbol(data->ctx, "used_string", (void *) data->str);
}
/**
* Classifies a file based on file extension. This classifier uses extensions
* installed at the file type extension point. Therefore we need pointer to
* the plug-in context to access the extensions. A plug-in instance initializes
* the classifier structure with the plug-in context pointer and registers a
* virtual symbol pointing to the classifier.
*/
static int classify(void *d, const char *path) {
cp_context_t *ctx = d;
cp_extension_t **exts;
const char *type = NULL;
int i;
// Go through all extensions registered at the extension point
exts = cp_get_extensions_info(ctx, "org.c-pluff.examples.cpfile.extension.file-types", NULL, NULL);
if (exts == NULL) {
cp_log(ctx, CP_LOG_ERROR, "Could not resolve file type extensions.");
return 0;
}
for (i = 0; type == NULL && exts[i] != NULL; i++) {
int j;
// Go through all file types provided by the extension
for (j = 0; type == NULL && j < exts[i]->configuration->num_children; j++) {
cp_cfg_element_t *elem = exts[i]->configuration->children + j;
const char *desc = NULL;
if (strcmp(elem->name, "file-type") == 0
&& (desc = cp_lookup_cfg_value(elem, "@description")) != NULL
&& (is_of_type(path, elem))) {
type = desc;
}
}
}
// Release extension information
cp_release_info(ctx, exts);
// Print file type if recognized, otherwise try other classifiers
if (type != NULL) {
fputs(type, stdout);
putchar('\n');
return 1;
} else {
return 0;
}
}