java_util_zip_ZipFile.c revision 51b1b6997fd3f980076b8081f7f1165ccc2a4008 
1/*
2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26/*
27 * Native method support for java.util.zip.ZipFile
28 */
29
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33#include <errno.h>
34#include <ctype.h>
35#include <assert.h>
36#include "jlong.h"
37#include "jvm.h"
38#include "jni.h"
39#include "jni_util.h"
40#include "zip_util.h"
41#ifdef WIN32
42#include "io_util_md.h"
43#else
44#include "io_util.h"
45#endif
46
47#include "java_util_zip_ZipFile.h"
48#include "java_util_jar_JarFile.h"
49
50#define DEFLATED 8
51#define STORED 0
52
53static jfieldID jzfileID;
54
55static int OPEN_READ = java_util_zip_ZipFile_OPEN_READ;
56static int OPEN_DELETE = java_util_zip_ZipFile_OPEN_DELETE;
57
58JNIEXPORT void JNICALL
59Java_java_util_zip_ZipFile_initIDs(JNIEnv *env, jclass cls)
60{
61    jzfileID = (*env)->GetFieldID(env, cls, "jzfile", "J");
62    assert(jzfileID != 0);
63}
64
65static void
66ThrowZipException(JNIEnv *env, const char *msg)
67{
68    jstring s = NULL;
69    jobject x;
70
71    if (msg != NULL) {
72        s = JNU_NewStringPlatform(env, msg);
73    }
74    x = JNU_NewObjectByName(env,
75                            "java/util/zip/ZipException",
76                            "(Ljava/lang/String;)V", s);
77    if (x != NULL) {
78        (*env)->Throw(env, x);
79    }
80}
81
82JNIEXPORT jlong JNICALL
83Java_java_util_zip_ZipFile_open(JNIEnv *env, jclass cls, jstring name,
84                                        jint mode, jlong lastModified,
85                                        jboolean usemmap)
86{
87    const char *path = JNU_GetStringPlatformChars(env, name, 0);
88    char *msg = 0;
89    jlong result = 0;
90    int flag = 0;
91    jzfile *zip = 0;
92
93    if (mode & OPEN_READ) flag |= O_RDONLY;
94    if (mode & OPEN_DELETE) flag |= JVM_O_DELETE;
95
96    if (path != 0) {
97        zip = ZIP_Get_From_Cache(path, &msg, lastModified);
98        if (zip == 0 && msg == 0) {
99            ZFILE zfd = 0;
100#ifdef WIN32
101            zfd = winFileHandleOpen(env, name, flag);
102            if (zfd == -1) {
103                /* Exception already pending. */
104                goto finally;
105            }
106#else
107            zfd = JVM_Open(path, flag, 0);
108            if (zfd < 0) {
109                throwFileNotFoundException(env, name);
110                goto finally;
111            }
112#endif
113            zip = ZIP_Put_In_Cache0(path, zfd, &msg, lastModified, usemmap);
114        }
115
116        if (zip != 0) {
117            result = ptr_to_jlong(zip);
118        } else if (msg != 0) {
119            ThrowZipException(env, msg);
120            free(msg);
121        } else if (errno == ENOMEM) {
122            JNU_ThrowOutOfMemoryError(env, 0);
123        } else {
124            ThrowZipException(env, "error in opening zip file");
125        }
126finally:
127        JNU_ReleaseStringPlatformChars(env, name, path);
128    }
129    return result;
130}
131
132JNIEXPORT jint JNICALL
133Java_java_util_zip_ZipFile_getTotal(JNIEnv *env, jclass cls, jlong zfile)
134{
135    jzfile *zip = jlong_to_ptr(zfile);
136
137    return zip->total;
138}
139
140JNIEXPORT jboolean JNICALL
141Java_java_util_zip_ZipFile_startsWithLOC(JNIEnv *env, jclass cls, jlong zfile)
142{
143    jzfile *zip = jlong_to_ptr(zfile);
144
145    return zip->locsig;
146}
147
148JNIEXPORT void JNICALL
149Java_java_util_zip_ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
150{
151    ZIP_Close(jlong_to_ptr(zfile));
152}
153
154JNIEXPORT jlong JNICALL
155Java_java_util_zip_ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
156                                    jbyteArray name, jboolean addSlash)
157{
158#define MAXNAME 1024
159    jzfile *zip = jlong_to_ptr(zfile);
160    jsize ulen = (*env)->GetArrayLength(env, name);
161    char buf[MAXNAME+2], *path;
162    jzentry *ze;
163
164    if (ulen > MAXNAME) {
165        path = malloc(ulen + 2);
166        if (path == 0) {
167            JNU_ThrowOutOfMemoryError(env, 0);
168            return 0;
169        }
170    } else {
171        path = buf;
172    }
173    (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
174    path[ulen] = '\0';
175    if (addSlash == JNI_FALSE) {
176        ze = ZIP_GetEntry(zip, path, 0);
177    } else {
178        ze = ZIP_GetEntry(zip, path, (jint)ulen);
179    }
180    if (path != buf) {
181        free(path);
182    }
183    return ptr_to_jlong(ze);
184}
185
186JNIEXPORT void JNICALL
187Java_java_util_zip_ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
188                                    jlong zentry)
189{
190    jzfile *zip = jlong_to_ptr(zfile);
191    jzentry *ze = jlong_to_ptr(zentry);
192    ZIP_FreeEntry(zip, ze);
193}
194
195JNIEXPORT jlong JNICALL
196Java_java_util_zip_ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
197                                        jint n)
198{
199    jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
200    return ptr_to_jlong(ze);
201}
202
203JNIEXPORT jint JNICALL
204Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
205{
206    jzentry *ze = jlong_to_ptr(zentry);
207    return ze->csize != 0 ? DEFLATED : STORED;
208}
209
210JNIEXPORT jint JNICALL
211Java_java_util_zip_ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
212{
213    jzentry *ze = jlong_to_ptr(zentry);
214    return ze->flag;
215}
216
217JNIEXPORT jlong JNICALL
218Java_java_util_zip_ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
219{
220    jzentry *ze = jlong_to_ptr(zentry);
221    return ze->csize != 0 ? ze->csize : ze->size;
222}
223
224JNIEXPORT jlong JNICALL
225Java_java_util_zip_ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
226{
227    jzentry *ze = jlong_to_ptr(zentry);
228    return ze->size;
229}
230
231JNIEXPORT jlong JNICALL
232Java_java_util_zip_ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
233{
234    jzentry *ze = jlong_to_ptr(zentry);
235    return (jlong)ze->time & 0xffffffffUL;
236}
237
238JNIEXPORT jlong JNICALL
239Java_java_util_zip_ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
240{
241    jzentry *ze = jlong_to_ptr(zentry);
242    return (jlong)ze->crc & 0xffffffffUL;
243}
244
245JNIEXPORT jbyteArray JNICALL
246Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv *env,
247                                           jclass cls,
248                                           jlong zfile)
249{
250    jzfile *zip = jlong_to_ptr(zfile);
251    jbyteArray jba = NULL;
252
253    if (zip->comment != NULL) {
254        if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
255            return NULL;
256        (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
257    }
258    return jba;
259}
260
261JNIEXPORT jbyteArray JNICALL
262Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv *env,
263                                         jclass cls,
264                                         jlong zentry, jint type)
265{
266    jzentry *ze = jlong_to_ptr(zentry);
267    int len = 0;
268    jbyteArray jba = NULL;
269    switch (type) {
270    case java_util_zip_ZipFile_JZENTRY_NAME:
271        if (ze->name != 0) {
272            len = (int)strlen(ze->name);
273            if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
274                break;
275            (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
276        }
277        break;
278    case java_util_zip_ZipFile_JZENTRY_EXTRA:
279        if (ze->extra != 0) {
280            unsigned char *bp = (unsigned char *)&ze->extra[0];
281            len = (bp[0] | (bp[1] << 8));
282            if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
283                break;
284            (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
285        }
286        break;
287    case java_util_zip_ZipFile_JZENTRY_COMMENT:
288        if (ze->comment != 0) {
289            len = (int)strlen(ze->comment);
290            if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
291                break;
292            (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
293        }
294        break;
295    }
296    return jba;
297}
298
299JNIEXPORT jint JNICALL
300Java_java_util_zip_ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
301                                jlong zentry, jlong pos, jbyteArray bytes,
302                                jint off, jint len)
303{
304    jzfile *zip = jlong_to_ptr(zfile);
305    char *msg;
306
307#define BUFSIZE 8192
308    /* copy via tmp stack buffer: */
309    jbyte buf[BUFSIZE];
310
311    if (len > BUFSIZE) {
312        len = BUFSIZE;
313    }
314
315    ZIP_Lock(zip);
316    len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
317    msg = zip->msg;
318    ZIP_Unlock(zip);
319    if (len != -1) {
320        (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
321    }
322
323    if (len == -1) {
324        if (msg != 0) {
325            ThrowZipException(env, msg);
326        } else {
327            char errmsg[128];
328            sprintf(errmsg, "errno: %d, error: %s\n",
329                    errno, "Error reading ZIP file");
330            JNU_ThrowIOExceptionWithLastError(env, errmsg);
331        }
332    }
333
334    return len;
335}
336
337/*
338 * Returns an array of strings representing the names of all entries
339 * that begin with "META-INF/" (case ignored). This native method is
340 * used in JarFile as an optimization when looking up manifest and
341 * signature file entries. Returns null if no entries were found.
342 */
343JNIEXPORT jobjectArray JNICALL
344Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
345{
346    jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
347    jzfile *zip;
348    int i, count;
349    jobjectArray result = 0;
350
351    if (zfile == 0) {
352        JNU_ThrowByName(env,
353                        "java/lang/IllegalStateException", "zip file closed");
354        return NULL;
355    }
356    zip = jlong_to_ptr(zfile);
357
358    /* count the number of valid ZIP metanames */
359    count = 0;
360    if (zip->metanames != 0) {
361        for (i = 0; i < zip->metacount; i++) {
362            if (zip->metanames[i] != 0) {
363                count++;
364            }
365        }
366    }
367
368    /* If some names were found then build array of java strings */
369    if (count > 0) {
370        jclass cls = (*env)->FindClass(env, "java/lang/String");
371        result = (*env)->NewObjectArray(env, count, cls, 0);
372        if (result != 0) {
373            for (i = 0; i < count; i++) {
374                jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
375                if (str == 0) {
376                    break;
377                }
378                (*env)->SetObjectArrayElement(env, result, i, str);
379                (*env)->DeleteLocalRef(env, str);
380            }
381        }
382    }
383    return result;
384}
385
386JNIEXPORT jstring JNICALL
387Java_java_util_zip_ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
388{
389    jzfile *zip = jlong_to_ptr(zfile);
390    char *msg = zip->msg;
391    if (msg == NULL) {
392        return NULL;
393    }
394    return JNU_NewStringPlatform(env, msg);
395}
396