JNIEXPORT void JNICALL Java_org_grammaticalframework_pgf_Parser_addLiteralCallback
(JNIEnv* env, jclass clazz, jobject jconcr, jlong callbacksRef, jstring jcat, jobject jcallback, jobject jpool)
{
PgfConcr* concr = get_ref(env, jconcr);
GuPool* pool = get_ref(env, jpool);
JPgfLiteralCallback* callback = gu_new(JPgfLiteralCallback, pool);
callback->callback.match = jpgf_literal_callback_match;
callback->callback.predict = jpgf_literal_callback_predict;
callback->jcallback = (*env)->NewGlobalRef(env, jcallback);
callback->fin.fn = jpgf_literal_callback_fin;
jclass callback_class = (*env)->GetObjectClass(env, jcallback);
callback->match_methodId = (*env)->GetMethodID(env, callback_class, "match", "(ILjava/lang/String;I)Lorg/grammaticalframework/pgf/LiteralCallback$CallbackResult;");
callback->predict_methodId = (*env)->GetMethodID(env, callback_class, "predict", "(ILjava/lang/String;)Ljava/util/Iterator;");
gu_pool_finally(pool, &callback->fin);
pgf_callbacks_map_add_literal(concr, l2p(callbacksRef),
j2gu_string(env, jcat, pool), &callback->callback);
}
int main(int argc, char* argv[]) {
// Set the character locale, so we can produce proper output.
setlocale(LC_CTYPE, "");
// Create the pool that is used to allocate everything
GuPool* pool = gu_new_pool();
int status = EXIT_SUCCESS;
if (argc < 5) {
fprintf(stderr, "usage: %s pgf cat from-lang to-lang\n", argv[0]);
status = EXIT_FAILURE;
goto fail;
}
GuString filename = argv[1];
GuString cat = argv[2];
GuString from_lang = argv[3];
GuString to_lang = argv[4];
// Create an exception frame that catches all errors.
GuExn* err = gu_new_exn(pool);
// Read the PGF grammar.
PgfPGF* pgf = pgf_read(filename, pool, err);
// If an error occured, it shows in the exception frame
if (!gu_ok(err)) {
fprintf(stderr, "Reading PGF failed\n");
status = EXIT_FAILURE;
goto fail;
}
// Look up the source and destination concrete categories
PgfConcr* from_concr = pgf_get_language(pgf, from_lang);
PgfConcr* to_concr = pgf_get_language(pgf, to_lang);
if (!from_concr || !to_concr) {
fprintf(stderr, "Unknown language\n");
status = EXIT_FAILURE;
goto fail_concr;
}
// Register a callback for the literal category Symbol
PgfCallbacksMap* callbacks =
pgf_new_callbacks_map(from_concr, pool);
pgf_callbacks_map_add_literal(from_concr, callbacks,
"PN", &pgf_nerc_literal_callback);
pgf_callbacks_map_add_literal(from_concr, callbacks,
"Symb", &pgf_unknown_literal_callback);
// Create an output stream for stdout
GuOut* out = gu_file_out(stdout, pool);
// We will keep the latest results in the 'ppool' and
// we will iterate over them by using 'result'.
GuPool* ppool = NULL;
GuEnum* result = NULL;
// The interactive translation loop.
// XXX: This currently reads stdin directly, so it doesn't support
// encodings properly. TODO: use a locale reader for input
while (true) {
fprintf(stdout, "> ");
fflush(stdout);
char buf[4096];
char* line = fgets(buf, sizeof(buf), stdin);
if (line == NULL) {
if (ferror(stdin)) {
fprintf(stderr, "Input error\n");
status = EXIT_FAILURE;
}
break;
} else if (strcmp(line, "") == 0) {
// End nicely on empty input
break;
} else if (strcmp(line, "\n") == 0) {
// Empty line -> show the next tree for the last sentence
if (result != NULL) {
clock_t start = clock();
PgfExprProb* ep = gu_next(result, PgfExprProb*, ppool);
clock_t end = clock();
double cpu_time_used = ((double) (end - start)) / CLOCKS_PER_SEC;
printf("%.2f sec\n", cpu_time_used);
// The enumerator will return a null variant at the
// end of the results.
if (ep == NULL) {
goto fail_parse;
}
print_result(ep, to_concr, out, err, ppool);
}
continue;
}
// We release the last results
if (ppool != NULL) {
gu_pool_free(ppool);
ppool = NULL;
result = NULL;
}
// We create a temporary pool for translating a single
// sentence, so our memory usage doesn't increase over time.
ppool = gu_new_pool();
clock_t start = clock();
GuExn* parse_err = gu_new_exn(ppool);
result =
pgf_parse_with_heuristics(from_concr, cat, line,
-1, callbacks,
parse_err, ppool, ppool);
if (!gu_ok(parse_err)) {
if (gu_exn_caught(parse_err, PgfExn)) {
GuString msg = gu_exn_caught_data(parse_err);
gu_string_write(msg, out, err);
gu_putc('\n', out, err);
} else if (gu_exn_caught(parse_err, PgfParseError)) {
gu_puts("Unexpected token: \"", out, err);
GuString tok = gu_exn_caught_data(parse_err);
gu_string_write(tok, out, err);
gu_puts("\"\n", out, err);
}
goto fail_parse;
}
PgfExprProb* ep = gu_next(result, PgfExprProb*, ppool);
clock_t end = clock();
double cpu_time_used = ((double) (end - start)) / CLOCKS_PER_SEC;
printf("%.2f sec\n", cpu_time_used);
// The enumerator will return null at the end of the results.
if (ep == NULL) {
goto fail_parse;
}
print_result(ep, to_concr, out, err, ppool);
continue;
fail_parse:
// Free all resources allocated during parsing and linearization
gu_pool_free(ppool);
ppool = NULL;
result = NULL;
}
