1 /* src/native/vm/cldc1.1/com_sun_cldc_io_ResourceInputStream.cpp
3 Copyright (C) 2007, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
31 #include "mm/memory.hpp"
33 #include "native/jni.hpp"
34 #include "native/native.hpp"
36 #if defined(ENABLE_JNI_HEADERS)
37 # include "native/include/com_sun_cldc_io_ResourceInputStream.h"
40 #include "threads/mutex.hpp"
42 #include "vm/array.hpp"
43 #include "vm/exceptions.hpp"
44 #include "vm/javaobjects.hpp"
46 #include "vm/string.hpp"
48 #include "vm/vm.hpp" /* REMOVE ME: temporarily */
52 static java_handle_t* zip_read_resource(list_classpath_entry *lce, utf *name)
54 hashtable_zipfile_entry *htzfe;
63 /* try to find the class in the current archive */
65 htzfe = zip_find(lce, name);
70 /* read stuff from local file header */
72 lfh.filenamelength = SUCK_LE_U2(htzfe->data + LFH_FILE_NAME_LENGTH);
73 lfh.extrafieldlength = SUCK_LE_U2(htzfe->data + LFH_EXTRA_FIELD_LENGTH);
75 indata = htzfe->data +
80 /* allocate buffer for uncompressed data */
82 outdata = MNEW(u1, htzfe->uncompressedsize);
84 /* how is the file stored? */
86 switch (htzfe->compressionmethod) {
88 /* fill z_stream structure */
91 zs.avail_in = htzfe->compressedsize;
92 zs.next_out = outdata;
93 zs.avail_out = htzfe->uncompressedsize;
99 /* initialize this inflate run */
101 if (inflateInit2(&zs, -MAX_WBITS) != Z_OK)
102 vm_abort("zip_get: inflateInit2 failed: %s", strerror(errno));
104 /* decompress the file into buffer */
106 err = inflate(&zs, Z_SYNC_FLUSH);
108 if ((err != Z_STREAM_END) && (err != Z_OK))
109 vm_abort("zip_get: inflate failed: %s", strerror(errno));
111 /* finish this inflate run */
113 if (inflateEnd(&zs) != Z_OK)
114 vm_abort("zip_get: inflateEnd failed: %s", strerror(errno));
118 /* uncompressed file, just copy the data */
119 MCOPY(outdata, indata, u1, htzfe->compressedsize);
123 vm_abort("zip_get: unknown compression method %d",
124 htzfe->compressionmethod);
127 // Create a file descriptor object.
128 ci = load_class_bootstrap(utf_new_char("com/sun/cldchi/jvm/FileDescriptor"));
129 java_handle_t* h = native_new_and_init(ci);
134 com_sun_cldchi_jvm_FileDescriptor fd(h, (int64_t) outdata, 0, htzfe->uncompressedsize);
136 return fd.get_handle();
140 static java_handle_t* file_read_resource(char *path)
143 struct stat statBuffer;
148 fd = open(path, O_RDONLY);
152 if (fstat(fd, &statBuffer) != -1) {
153 len = statBuffer.st_size;
158 /* Map file into the memory */
159 filep = (u1*) mmap(0, len, PROT_READ, MAP_PRIVATE, fd, 0);
161 /* Create a file descriptor object */
162 ci = load_class_bootstrap(utf_new_char("com/sun/cldchi/jvm/FileDescriptor"));
163 java_handle_t* h = native_new_and_init(ci);
168 com_sun_cldchi_jvm_FileDescriptor fd(h, (int64_t) filep, 0, len);
170 return fd.get_handle();
178 // Native functions are exported as C functions.
182 * Class: com/sun/cldc/io/ResourceInputStream
184 * Signature: (Ljava/lang/String;)Ljava/lang/Object;
186 JNIEXPORT jobject JNICALL Java_com_sun_cldc_io_ResourceInputStream_open(JNIEnv *env, jclass clazz, jstring name)
192 java_handle_t* descriptor;
194 // Get current list of classpath entries.
195 SuckClasspath& suckclasspath = VM::get_current()->get_suckclasspath();
197 /* get the classname as char string (do it here for the warning at
198 the end of the function) */
200 uname = javastring_toutf((java_handle_t *)name, false);
201 filenamelen = utf_bytes(uname) + strlen("0");
202 filename = MNEW(char, filenamelen);
203 utf_copy(filename, uname);
205 /* walk through all classpath entries */
207 for (SuckClasspath::iterator it = suckclasspath.begin(); it != suckclasspath.end(); it++) {
208 list_classpath_entry* lce = *it;
210 #if defined(ENABLE_ZLIB)
211 if (lce->type == CLASSPATH_ARCHIVE) {
213 /* enter a monitor on zip/jar archives */
216 /* try to get the file in current archive */
217 descriptor = zip_read_resource(lce, uname);
219 /* leave the monitor */
220 lce->mutex->unlock();
222 if (descriptor != NULL) { /* file exists */
229 path = MNEW(char, lce->pathlen + filenamelen);
230 strcpy(path, lce->path);
231 strcat(path, filename);
233 descriptor = file_read_resource(path);
235 MFREE(path, char, lce->pathlen + filenamelen);
237 if (descriptor != NULL) { /* file exists */
240 #if defined(ENABLE_ZLIB)
245 MFREE(filename, char, filenamelen);
247 return (jobject) descriptor;
252 * Class: com/sun/cldc/io/ResourceInputStream
253 * Method: bytesRemain
254 * Signature: (Ljava/lang/Object;)I
256 JNIEXPORT jint JNICALL Java_com_sun_cldc_io_ResourceInputStream_bytesRemain(JNIEnv *env, jclass clazz, jobject jobj)
258 com_sun_cldchi_jvm_FileDescriptor fd(jobj);
259 int32_t length = fd.get_position();
260 int32_t position = fd.get_length();
262 return length - position;
267 * Class: com/sun/cldc/io/ResourceInputStream
269 * Signature: (Ljava/lang/Object;)I
271 JNIEXPORT jint JNICALL Java_com_sun_cldc_io_ResourceInputStream_readByte(JNIEnv *env, jclass clazz, jobject jobj)
273 com_sun_cldchi_jvm_FileDescriptor fd(jobj);
275 int64_t filep = fd.get_pointer();
276 int32_t position = fd.get_position();
277 int32_t length = fd.get_length();
281 if (position < length) {
282 byte = ((uint8_t*) filep)[position];
289 // Update access position.
290 fd.set_position(position);
292 return (byte & 0xFF);
297 * Class: com/sun/cldc/io/ResourceInputStream
299 * Signature: (Ljava/lang/Object;[BII)I
301 JNIEXPORT jint JNICALL Java_com_sun_cldc_io_ResourceInputStream_readBytes(JNIEnv *env, jclass clazz, jobject jobj, jbyteArray byteArray, jint off, jint len)
303 /* get pointer to the buffer */
305 ByteArray ba(byteArray);
306 void* buf = (void*) (((int8_t*) ba.get_raw_data_ptr()) + off);
308 com_sun_cldchi_jvm_FileDescriptor fd(jobj);
310 int64_t filep = fd.get_pointer();
311 int32_t position = fd.get_position();
312 int32_t fileLength = fd.get_length();
314 int32_t readBytes = -1;
316 if (position < fileLength) {
317 int32_t available = fileLength - position;
319 if (available < len) {
320 readBytes = available;
325 os::memcpy(buf, ((uint8_t*) filep) + position, readBytes * sizeof(uint8_t));
326 position += readBytes;
332 // Update access position.
333 fd.set_position(position);
340 * Class: com/sun/cldc/io/ResourceInputStream
342 * Signature: (Ljava/lang/Object;)Ljava/lang/Object;
344 JNIEXPORT jobject JNICALL Java_com_sun_cldc_io_ResourceInputStream_clone(JNIEnv *env, jclass clazz, jobject jobj)
346 com_sun_cldchi_jvm_FileDescriptor fd(jobj);
348 classinfo* c = load_class_bootstrap(utf_new_char("com/sun/cldchi/jvm/FileDescriptor"));
349 java_handle_t* h = native_new_and_init(c);
354 com_sun_cldchi_jvm_FileDescriptor clonefd(h, fd);
356 return (jobject) clonefd.get_handle();
362 /* native methods implemented by this file ************************************/
364 static JNINativeMethod methods[] = {
365 { (char*) "open", (char*) "(Ljava/lang/String;)Ljava/lang/Object;", (void*) (uintptr_t) &Java_com_sun_cldc_io_ResourceInputStream_open },
366 { (char*) "bytesRemain", (char*) "(Ljava/lang/Object;)I", (void*) (uintptr_t) &Java_com_sun_cldc_io_ResourceInputStream_bytesRemain },
367 { (char*) "readByte", (char*) "(Ljava/lang/Object;)I", (void*) (uintptr_t) &Java_com_sun_cldc_io_ResourceInputStream_readByte },
368 { (char*) "readBytes", (char*) "(Ljava/lang/Object;[BII)I", (void*) (uintptr_t) &Java_com_sun_cldc_io_ResourceInputStream_readBytes },
369 { (char*) "clone", (char*) "(Ljava/lang/Object;)Ljava/lang/Object;", (void*) (uintptr_t) &Java_com_sun_cldc_io_ResourceInputStream_clone },
373 /* _Jv_com_sun_cldc_io_ResourceInputStream_init ********************************
375 Register native functions.
377 *******************************************************************************/
379 void _Jv_com_sun_cldc_io_ResourceInputStream_init(void)
381 utf* u = utf_new_char("com/sun/cldc/io/ResourceInputStream");
383 NativeMethods& nm = VM::get_current()->get_nativemethods();
384 nm.register_methods(u, methods, NATIVE_METHODS_COUNT);
389 * These are local overrides for various environment variables in Emacs.
390 * Please do not remove this and leave it at the end of the file, where
391 * Emacs will automagically detect them.
392 * ---------------------------------------------------------------------
395 * indent-tabs-mode: t
399 * vim:noexpandtab:sw=4:ts=4: