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#include <pgf/pgf.h>
#include <gu/mem.h>
#include <gu/exn.h>
#include <alloca.h>
#include "org_grammaticalframework_pgf_PGF.h"
static jstring
gu2j_string(JNIEnv *env, GuString s) {
GuWord w = s.w_;
uint8_t buf[sizeof(GuWord)];
uint8_t* utf8;
size_t len;
if (w & 1) {
len = (w & 0xff) >> 1;
gu_assert(len <= sizeof(GuWord));
size_t i = len;
while (i > 0) {
w >>= 8;
buf[--i] = w & 0xff;
}
utf8 = buf;
} else {
uint8_t* p = (void*) w;
len = (p[0] == 0) ? ((size_t*) p)[-1] : p[0];
utf8 = &p[1];
}
const uint8_t* src = utf8;
jchar* utf16 = alloca(len*sizeof(jchar));
jchar* dst = utf16;
while (src-utf8 < len) {
GuUCS ucs = gu_utf8_decode(&src);
if (ucs <= 0xFFFF) {
*dst++ = ucs;
} else {
ucs -= 0x10000;
*dst++ = 0xD800+(ucs >> 10) & 0x3FF;
*dst++ = 0xDC00+ucs & 0x3FF;
}
}
return (*env)->NewString(env, utf16, dst-utf16);
}
static PgfPGF*
get_pgf(JNIEnv *env, jobject self) {
jfieldID grId = (*env)->GetFieldID(env, (*env)->GetObjectClass(env, self), "gr", "J");
return (PgfPGF*) (*env)->GetLongField(env, self, grId);
}
static PgfPGF*
get_concr(JNIEnv *env, jobject self) {
jfieldID concrId = (*env)->GetFieldID(env, (*env)->GetObjectClass(env, self), "concr", "J");
return (PgfPGF*) (*env)->GetLongField(env, self, concrId);
}
JNIEXPORT jobject JNICALL
Java_org_grammaticalframework_pgf_PGF_readPGF(JNIEnv *env, jclass cls, jstring s)
{
GuPool* pool = gu_new_pool();
GuPool* tmp_pool = gu_local_pool();
// Create an exception frame that catches all errors.
GuExn* err = gu_new_exn(NULL, gu_kind(type), tmp_pool);
const char *fpath = (*env)->GetStringUTFChars(env, s, 0);
// Read the PGF grammar.
PgfPGF* pgf = pgf_read(fpath, pool, err);
(*env)->ReleaseStringUTFChars(env, s, fpath);
if (!gu_ok(err)) {
if (gu_exn_caught(err) == gu_type(GuErrno)) {
jclass exception_class = (*env)->FindClass(env, "java/io/FileNotFoundException");
if (!exception_class)
return NULL;
jmethodID constrId = (*env)->GetMethodID(env, exception_class, "<init>", "(Ljava/lang/String;)V");
if (!constrId)
return NULL;
jobject exception = (*env)->NewObject(env, exception_class, constrId, s);
if (!exception)
return NULL;
(*env)->Throw(env, exception);
} else {
jclass exception_class = (*env)->FindClass(env, "org/grammaticalframework/PGFError");
if (!exception_class)
return NULL;
jmethodID constrId = (*env)->GetMethodID(env, exception_class, "<init>", "(Ljava/lang/String;)V");
if (!constrId)
return NULL;
jstring msg = (*env)->NewStringUTF(env, "The grammar cannot be loaded");
if (!msg)
return NULL;
jobject exception = (*env)->NewObject(env, exception_class, constrId, msg);
if (!exception)
return NULL;
(*env)->Throw(env, exception);
}
gu_pool_free(pool);
gu_pool_free(tmp_pool);
return NULL;
}
gu_pool_free(tmp_pool);
jmethodID constrId = (*env)->GetMethodID(env, cls, "<init>", "(JJ)V");
return (*env)->NewObject(env, cls, constrId, (jlong) pool, (jlong) pgf);
}
JNIEXPORT jstring JNICALL
Java_org_grammaticalframework_pgf_PGF_getAbstractName(JNIEnv* env, jobject self)
{
return gu2j_string(env, pgf_abstract_name(get_pgf(env, self)));
}
JNIEXPORT void JNICALL
Java_org_grammaticalframework_pgf_PGF_free(JNIEnv* env, jclass cls, jlong pool)
{
gu_pool_free((GuPool*) pool);
}
typedef struct {
GuMapItor fn;
JNIEnv *env;
jobject grammar;
jobject object;
} JPGFClosure;
static void
pgf_collect_langs(GuMapItor* fn, const void* key, void* value, GuExn* err)
{
PgfCId name = *((PgfCId*) key);
PgfConcr* concr = *((PgfConcr**) value);
JPGFClosure* clo = (JPGFClosure*) fn;
jstring jname = gu2j_string(clo->env, name);
jclass map_class = (*clo->env)->GetObjectClass(clo->env, clo->object);
jmethodID put_method = (*clo->env)->GetMethodID(clo->env, map_class, "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
jclass concr_class = (*clo->env)->FindClass(clo->env, "org/grammaticalframework/pgf/Concr");
jmethodID constrId = (*clo->env)->GetMethodID(clo->env, concr_class, "<init>", "(Lorg/grammaticalframework/pgf/PGF;J)V");
jobject jconcr = (*clo->env)->NewObject(clo->env, concr_class, constrId, clo->grammar, (jlong) concr);
(*clo->env)->CallObjectMethod(clo->env, clo->object, put_method, jname, jconcr);
}
JNIEXPORT jobject JNICALL
Java_org_grammaticalframework_pgf_PGF_getLanguages(JNIEnv* env, jobject self)
{
jclass map_class = (*env)->FindClass(env, "java/util/HashMap");
if (!map_class)
return NULL;
jmethodID constrId = (*env)->GetMethodID(env, map_class, "<init>", "()V");
if (!constrId)
return NULL;
jobject languages = (*env)->NewObject(env, map_class, constrId);
if (!languages)
return NULL;
PgfPGF* pgf = get_pgf(env, self);
GuPool* tmp_pool = gu_local_pool();
// Create an exception frame that catches all errors.
GuExn* err = gu_new_exn(NULL, gu_kind(type), tmp_pool);
JPGFClosure clo = { { pgf_collect_langs }, env, self, languages };
pgf_iter_languages(pgf, &clo.fn, err);
if (!gu_ok(err)) {
gu_pool_free(tmp_pool);
return NULL;
}
gu_pool_free(tmp_pool);
return languages;
}
JNIEXPORT jstring JNICALL
Java_org_grammaticalframework_pgf_Concr_getName(JNIEnv* env, jobject self)
{
return gu2j_string(env, pgf_concrete_name(get_concr(env, self)));
}
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