1 /* 2 * Copyright (c) 1995, 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 * Prototypes for zip file support 28 */ 29 30 #ifndef _ZIP_H_ 31 #define _ZIP_H_ 32 33 /* 34 * Header signatures 35 */ 36 #define LOCSIG 0x04034b50L /* "PK\003\004" */ 37 #define EXTSIG 0x08074b50L /* "PK\007\008" */ 38 #define CENSIG 0x02014b50L /* "PK\001\002" */ 39 #define ENDSIG 0x06054b50L /* "PK\005\006" */ 40 41 #define ZIP64_ENDSIG 0x06064b50L /* "PK\006\006" */ 42 #define ZIP64_LOCSIG 0x07064b50L /* "PK\006\007" */ 43 44 /* 45 * Header sizes including signatures 46 */ 47 48 #define LOCHDR 30 49 #define EXTHDR 16 50 #define CENHDR 46 51 #define ENDHDR 22 52 53 #define ZIP64_ENDHDR 56 // ZIP64 end header size 54 #define ZIP64_LOCHDR 20 // ZIP64 end loc header size 55 #define ZIP64_EXTHDR 24 // EXT header size 56 #define ZIP64_EXTID 1 // Extra field Zip64 header ID 57 58 #define ZIP64_MAGICVAL 0xffffffffLL 59 #define ZIP64_MAGICCOUNT 0xffff 60 61 62 /* 63 * Header field access macros 64 */ 65 #define CH(b, n) (((unsigned char *)(b))[n]) 66 #define SH(b, n) (CH(b, n) | (CH(b, n+1) << 8)) 67 #define LG(b, n) ((SH(b, n) | (SH(b, n+2) << 16)) &0xffffffffUL) 68 #define LL(b, n) (((jlong)LG(b, n)) | (((jlong)LG(b, n+4)) << 32)) 69 #define GETSIG(b) LG(b, 0) 70 71 /* 72 * Macros for getting local file (LOC) header fields 73 */ 74 #define LOCVER(b) SH(b, 4) /* version needed to extract */ 75 #define LOCFLG(b) SH(b, 6) /* general purpose bit flags */ 76 #define LOCHOW(b) SH(b, 8) /* compression method */ 77 #define LOCTIM(b) LG(b, 10) /* modification time */ 78 #define LOCCRC(b) LG(b, 14) /* crc of uncompressed data */ 79 #define LOCSIZ(b) LG(b, 18) /* compressed data size */ 80 #define LOCLEN(b) LG(b, 22) /* uncompressed data size */ 81 #define LOCNAM(b) SH(b, 26) /* filename length */ 82 #define LOCEXT(b) SH(b, 28) /* extra field length */ 83 84 /* 85 * Macros for getting extra local (EXT) header fields 86 */ 87 #define EXTCRC(b) LG(b, 4) /* crc of uncompressed data */ 88 #define EXTSIZ(b) LG(b, 8) /* compressed size */ 89 #define EXTLEN(b) LG(b, 12) /* uncompressed size */ 90 91 /* 92 * Macros for getting central directory header (CEN) fields 93 */ 94 #define CENVEM(b) SH(b, 4) /* version made by */ 95 #define CENVER(b) SH(b, 6) /* version needed to extract */ 96 #define CENFLG(b) SH(b, 8) /* general purpose bit flags */ 97 #define CENHOW(b) SH(b, 10) /* compression method */ 98 #define CENTIM(b) LG(b, 12) /* modification time */ 99 #define CENCRC(b) LG(b, 16) /* crc of uncompressed data */ 100 #define CENSIZ(b) LG(b, 20) /* compressed size */ 101 #define CENLEN(b) LG(b, 24) /* uncompressed size */ 102 #define CENNAM(b) SH(b, 28) /* length of filename */ 103 #define CENEXT(b) SH(b, 30) /* length of extra field */ 104 #define CENCOM(b) SH(b, 32) /* file comment length */ 105 #define CENDSK(b) SH(b, 34) /* disk number start */ 106 #define CENATT(b) SH(b, 36) /* internal file attributes */ 107 #define CENATX(b) LG(b, 38) /* external file attributes */ 108 #define CENOFF(b) LG(b, 42) /* offset of local header */ 109 110 /* 111 * Macros for getting end of central directory header (END) fields 112 */ 113 #define ENDSUB(b) SH(b, 8) /* number of entries on this disk */ 114 #define ENDTOT(b) SH(b, 10) /* total number of entries */ 115 #define ENDSIZ(b) LG(b, 12) /* central directory size */ 116 #define ENDOFF(b) LG(b, 16) /* central directory offset */ 117 #define ENDCOM(b) SH(b, 20) /* size of zip file comment */ 118 119 /* 120 * Macros for getting Zip64 end of central directory header fields 121 */ 122 #define ZIP64_ENDLEN(b) LL(b, 4) /* size of zip64 end of central dir */ 123 #define ZIP64_ENDVEM(b) SH(b, 12) /* version made by */ 124 #define ZIP64_ENDVER(b) SH(b, 14) /* version needed to extract */ 125 #define ZIP64_ENDNMD(b) LG(b, 16) /* number of this disk */ 126 #define ZIP64_ENDDSK(b) LG(b, 20) /* disk number of start */ 127 #define ZIP64_ENDTOD(b) LL(b, 24) /* total number of entries on this disk */ 128 #define ZIP64_ENDTOT(b) LL(b, 32) /* total number of entries */ 129 #define ZIP64_ENDSIZ(b) LL(b, 40) /* central directory size in bytes */ 130 #define ZIP64_ENDOFF(b) LL(b, 48) /* offset of first CEN header */ 131 132 /* 133 * Macros for getting Zip64 end of central directory locator fields 134 */ 135 #define ZIP64_LOCDSK(b) LG(b, 4) /* disk number start */ 136 #define ZIP64_LOCOFF(b) LL(b, 8) /* offset of zip64 end */ 137 #define ZIP64_LOCTOT(b) LG(b, 16) /* total number of disks */ 138 139 /* 140 * Supported compression methods 141 */ 142 #define STORED 0 143 #define DEFLATED 8 144 145 /* 146 * Support for reading ZIP/JAR files. Some things worth noting: 147 * 148 * - Zip file entries larger than 2**32 bytes are not supported. 149 * - jzentry time and crc fields are signed even though they really 150 * represent unsigned quantities. 151 * - If csize is zero then the entry is uncompressed. 152 * - If extra != 0 then the first two bytes are the length of the extra 153 * data in intel byte order. 154 * - If pos <= 0 then it is the position of entry LOC header. 155 * If pos > 0 then it is the position of entry data. 156 * pos should not be accessed directly, but only by ZIP_GetEntryDataOffset. 157 */ 158 159 typedef struct jzentry { /* Zip file entry */ 160 char *name; /* entry name */ 161 jlong time; /* modification time */ 162 jlong size; /* size of uncompressed data */ 163 jlong csize; /* size of compressed data (zero if uncompressed) */ 164 jint crc; /* crc of uncompressed data */ 165 char *comment; /* optional zip file comment */ 166 jbyte *extra; /* optional extra data */ 167 jlong pos; /* position of LOC header or entry data */ 168 jint flag; /* general purpose flag */ 169 } jzentry; 170 171 /* 172 * In-memory hash table cell. 173 * In a typical system we have a *lot* of these, as we have one for 174 * every entry in every active JAR. 175 * Note that in order to save space we don't keep the name in memory, 176 * but merely remember a 32 bit hash. 177 */ 178 typedef struct jzcell { 179 unsigned int hash; /* 32 bit hashcode on name */ 180 unsigned int next; /* hash chain: index into jzfile->entries */ 181 jlong cenpos; /* Offset of central directory file header */ 182 } jzcell; 183 184 typedef struct cencache { 185 char *data; /* A cached page of CEN headers */ 186 jlong pos; /* file offset of data */ 187 } cencache; 188 189 /* 190 * Use ZFILE to represent access to a file in a platform-indepenent 191 * fashion. 192 */ 193 #ifdef WIN32 194 #define ZFILE jlong 195 #else 196 #define ZFILE int 197 #endif 198 199 /* 200 * Use mmap for CEN & ENDHDR sections 201 */ 202 #define USE_MMAP 1 203 204 /* 205 * Descriptor for a ZIP file. 206 */ 207 typedef struct jzfile { /* Zip file */ 208 char *name; /* zip file name */ 209 jint refs; /* number of active references */ 210 jlong len; /* length (in bytes) of zip file */ 211 #ifdef USE_MMAP 212 unsigned char *maddr; /* beginning address of the CEN & ENDHDR */ 213 jlong mlen; /* length (in bytes) mmaped */ 214 jlong offset; /* offset of the mmapped region from the 215 start of the file. */ 216 jboolean usemmap; /* if mmap is used. */ 217 #endif 218 jboolean locsig; /* if zip file starts with LOCSIG */ 219 cencache cencache; /* CEN header cache */ 220 ZFILE zfd; /* open file descriptor */ 221 void *lock; /* read lock */ 222 char *comment; /* zip file comment */ 223 jint clen; /* length of the zip file comment */ 224 char *msg; /* zip error message */ 225 jzcell *entries; /* array of hash cells */ 226 jint total; /* total number of entries */ 227 jint *table; /* Hash chain heads: indexes into entries */ 228 jint tablelen; /* number of hash heads */ 229 struct jzfile *next; /* next zip file in search list */ 230 jzentry *cache; /* we cache the most recently freed jzentry */ 231 /* Information on metadata names in META-INF directory */ 232 char **metanames; /* array of meta names (may have null names) */ 233 jint metacurrent; /* the next empty slot in metanames array */ 234 jint metacount; /* number of slots in metanames array */ 235 jlong lastModified; /* last modified time */ 236 jlong locpos; /* position of first LOC header (usually 0) */ 237 } jzfile; 238 239 /* 240 * Index representing end of hash chain 241 */ 242 #define ZIP_ENDCHAIN ((jint)-1) 243 244 jzentry * JNICALL 245 ZIP_FindEntry(jzfile *zip, char *name, jint *sizeP, jint *nameLenP); 246 247 jboolean JNICALL 248 ZIP_ReadEntry(jzfile *zip, jzentry *entry, unsigned char *buf, char *entrynm); 249 250 jzentry * JNICALL 251 ZIP_GetNextEntry(jzfile *zip, jint n); 252 253 jzfile * JNICALL 254 ZIP_Open(const char *name, char **pmsg); 255 256 jzfile * 257 ZIP_Open_Generic(const char *name, char **pmsg, int mode, jlong lastModified); 258 259 jzfile * 260 ZIP_Get_From_Cache(const char *name, char **pmsg, jlong lastModified); 261 262 jzfile * 263 ZIP_Put_In_Cache(const char *name, ZFILE zfd, char **pmsg, jlong lastModified); 264 265 jzfile * 266 ZIP_Put_In_Cache0(const char *name, ZFILE zfd, char **pmsg, jlong lastModified, jboolean usemmap); 267 268 void JNICALL 269 ZIP_Close(jzfile *zip); 270 271 jzentry * ZIP_GetEntry(jzfile *zip, char *name, jint ulen); 272 void ZIP_Lock(jzfile *zip); 273 void ZIP_Unlock(jzfile *zip); 274 jint ZIP_Read(jzfile *zip, jzentry *entry, jlong pos, void *buf, jint len); 275 void ZIP_FreeEntry(jzfile *zip, jzentry *ze); 276 jlong ZIP_GetEntryDataOffset(jzfile *zip, jzentry *entry); 277 278 #endif /* !_ZIP_H_ */ 279
