/* * ZIP support routines for PhysicsFS. * * Please see the file LICENSE.txt in the source's root directory. * * This file written by Ryan C. Gordon, with some peeking at "unzip.c" * by Gilles Vollant. */ #define __PHYSICSFS_INTERNAL__ #include "physfs_internal.h" #if PHYSFS_SUPPORTS_ZIP #include #include #include "physfs_miniz.h" /* * A buffer of ZIP_READBUFSIZE is allocated for each compressed file opened, * and is freed when you close the file; compressed data is read into * this buffer, and then is decompressed into the buffer passed to * PHYSFS_read(). * * Uncompressed entries in a zipfile do not allocate this buffer; they just * read data directly into the buffer passed to PHYSFS_read(). * * Depending on your speed and memory requirements, you should tweak this * value. */ #define ZIP_READBUFSIZE (16 * 1024) /* * Entries are "unresolved" until they are first opened. At that time, * local file headers parsed/validated, data offsets will be updated to look * at the actual file data instead of the header, and symlinks will be * followed and optimized. This means that we don't seek and read around the * archive until forced to do so, and after the first time, we had to do * less reading and parsing, which is very CD-ROM friendly. */ typedef enum { ZIP_UNRESOLVED_FILE, ZIP_UNRESOLVED_SYMLINK, ZIP_RESOLVING, ZIP_RESOLVED, ZIP_BROKEN_FILE, ZIP_BROKEN_SYMLINK } ZipResolveType; /* * One ZIPentry is kept for each file in an open ZIP archive. */ typedef struct _ZIPentry { char *name; /* Name of file in archive */ struct _ZIPentry *symlink; /* NULL or file we symlink to */ ZipResolveType resolved; /* Have we resolved file/symlink? */ PHYSFS_uint64 offset; /* offset of data in archive */ PHYSFS_uint16 version; /* version made by */ PHYSFS_uint16 version_needed; /* version needed to extract */ PHYSFS_uint16 compression_method; /* compression method */ PHYSFS_uint32 crc; /* crc-32 */ PHYSFS_uint64 compressed_size; /* compressed size */ PHYSFS_uint64 uncompressed_size; /* uncompressed size */ PHYSFS_sint64 last_mod_time; /* last file mod time */ } ZIPentry; /* * One ZIPinfo is kept for each open ZIP archive. */ typedef struct { PHYSFS_Io *io; int zip64; /* non-zero if this is a Zip64 archive. */ PHYSFS_uint64 entryCount; /* Number of files in ZIP. */ ZIPentry *entries; /* info on all files in ZIP. */ } ZIPinfo; /* * One ZIPfileinfo is kept for each open file in a ZIP archive. */ typedef struct { ZIPentry *entry; /* Info on file. */ PHYSFS_Io *io; /* physical file handle. */ PHYSFS_uint32 compressed_position; /* offset in compressed data. */ PHYSFS_uint32 uncompressed_position; /* tell() position. */ PHYSFS_uint8 *buffer; /* decompression buffer. */ z_stream stream; /* zlib stream state. */ } ZIPfileinfo; /* Magic numbers... */ #define ZIP_LOCAL_FILE_SIG 0x04034b50 #define ZIP_CENTRAL_DIR_SIG 0x02014b50 #define ZIP_END_OF_CENTRAL_DIR_SIG 0x06054b50 #define ZIP64_END_OF_CENTRAL_DIR_SIG 0x06064b50 #define ZIP64_END_OF_CENTRAL_DIRECTORY_LOCATOR_SIG 0x07064b50 #define ZIP64_EXTENDED_INFO_EXTRA_FIELD_SIG 0x0001 /* compression methods... */ #define COMPMETH_NONE 0 /* ...and others... */ #define UNIX_FILETYPE_MASK 0170000 #define UNIX_FILETYPE_SYMLINK 0120000 /* * Bridge physfs allocation functions to zlib's format... */ static voidpf zlibPhysfsAlloc(voidpf opaque, uInt items, uInt size) { return ((PHYSFS_Allocator *) opaque)->Malloc(items * size); } /* zlibPhysfsAlloc */ /* * Bridge physfs allocation functions to zlib's format... */ static void zlibPhysfsFree(voidpf opaque, voidpf address) { ((PHYSFS_Allocator *) opaque)->Free(address); } /* zlibPhysfsFree */ /* * Construct a new z_stream to a sane state. */ static void initializeZStream(z_stream *pstr) { memset(pstr, '\0', sizeof (z_stream)); pstr->zalloc = zlibPhysfsAlloc; pstr->zfree = zlibPhysfsFree; pstr->opaque = &allocator; } /* initializeZStream */ static PHYSFS_ErrorCode zlib_error_code(int rc) { switch (rc) { case Z_OK: return PHYSFS_ERR_OK; /* not an error. */ case Z_STREAM_END: return PHYSFS_ERR_OK; /* not an error. */ case Z_ERRNO: return PHYSFS_ERR_IO; case Z_MEM_ERROR: return PHYSFS_ERR_OUT_OF_MEMORY; default: return PHYSFS_ERR_CORRUPT; } /* switch */ } /* zlib_error_string */ /* * Wrap all zlib calls in this, so the physfs error state is set appropriately. */ static int zlib_err(const int rc) { PHYSFS_setErrorCode(zlib_error_code(rc)); return rc; } /* zlib_err */ /* * Read an unsigned 64-bit int and swap to native byte order. */ static int readui64(PHYSFS_Io *io, PHYSFS_uint64 *val) { PHYSFS_uint64 v; BAIL_IF_MACRO(!__PHYSFS_readAll(io, &v, sizeof (v)), ERRPASS, 0); *val = PHYSFS_swapULE64(v); return 1; } /* readui64 */ /* * Read an unsigned 32-bit int and swap to native byte order. */ static int readui32(PHYSFS_Io *io, PHYSFS_uint32 *val) { PHYSFS_uint32 v; BAIL_IF_MACRO(!__PHYSFS_readAll(io, &v, sizeof (v)), ERRPASS, 0); *val = PHYSFS_swapULE32(v); return 1; } /* readui32 */ /* * Read an unsigned 16-bit int and swap to native byte order. */ static int readui16(PHYSFS_Io *io, PHYSFS_uint16 *val) { PHYSFS_uint16 v; BAIL_IF_MACRO(!__PHYSFS_readAll(io, &v, sizeof (v)), ERRPASS, 0); *val = PHYSFS_swapULE16(v); return 1; } /* readui16 */ static PHYSFS_sint64 ZIP_read(PHYSFS_Io *_io, void *buf, PHYSFS_uint64 len) { ZIPfileinfo *finfo = (ZIPfileinfo *) _io->opaque; PHYSFS_Io *io = finfo->io; ZIPentry *entry = finfo->entry; PHYSFS_sint64 retval = 0; PHYSFS_sint64 maxread = (PHYSFS_sint64) len; PHYSFS_sint64 avail = entry->uncompressed_size - finfo->uncompressed_position; if (avail < maxread) maxread = avail; BAIL_IF_MACRO(maxread == 0, ERRPASS, 0); /* quick rejection. */ if (entry->compression_method == COMPMETH_NONE) retval = io->read(io, buf, maxread); else { finfo->stream.next_out = buf; finfo->stream.avail_out = (uInt) maxread; while (retval < maxread) { PHYSFS_uint32 before = finfo->stream.total_out; int rc; if (finfo->stream.avail_in == 0) { PHYSFS_sint64 br; br = entry->compressed_size - finfo->compressed_position; if (br > 0) { if (br > ZIP_READBUFSIZE) br = ZIP_READBUFSIZE; br = io->read(io, finfo->buffer, (PHYSFS_uint64) br); if (br <= 0) break; finfo->compressed_position += (PHYSFS_uint32) br; finfo->stream.next_in = finfo->buffer; finfo->stream.avail_in = (PHYSFS_uint32) br; } /* if */ } /* if */ rc = zlib_err(inflate(&finfo->stream, Z_SYNC_FLUSH)); retval += (finfo->stream.total_out - before); if (rc != Z_OK) break; } /* while */ } /* else */ if (retval > 0) finfo->uncompressed_position += (PHYSFS_uint32) retval; return retval; } /* ZIP_read */ static PHYSFS_sint64 ZIP_write(PHYSFS_Io *io, const void *b, PHYSFS_uint64 len) { BAIL_MACRO(PHYSFS_ERR_READ_ONLY, -1); } /* ZIP_write */ static PHYSFS_sint64 ZIP_tell(PHYSFS_Io *io) { return ((ZIPfileinfo *) io->opaque)->uncompressed_position; } /* ZIP_tell */ static int ZIP_seek(PHYSFS_Io *_io, PHYSFS_uint64 offset) { ZIPfileinfo *finfo = (ZIPfileinfo *) _io->opaque; ZIPentry *entry = finfo->entry; PHYSFS_Io *io = finfo->io; BAIL_IF_MACRO(offset > entry->uncompressed_size, PHYSFS_ERR_PAST_EOF, 0); if (entry->compression_method == COMPMETH_NONE) { const PHYSFS_sint64 newpos = offset + entry->offset; BAIL_IF_MACRO(!io->seek(io, newpos), ERRPASS, 0); finfo->uncompressed_position = (PHYSFS_uint32) offset; } /* if */ else { /* * If seeking backwards, we need to redecode the file * from the start and throw away the compressed bits until we hit * the offset we need. If seeking forward, we still need to * decode, but we don't rewind first. */ if (offset < finfo->uncompressed_position) { /* we do a copy so state is sane if inflateInit2() fails. */ z_stream str; initializeZStream(&str); if (zlib_err(inflateInit2(&str, -MAX_WBITS)) != Z_OK) return 0; if (!io->seek(io, entry->offset)) return 0; inflateEnd(&finfo->stream); memcpy(&finfo->stream, &str, sizeof (z_stream)); finfo->uncompressed_position = finfo->compressed_position = 0; } /* if */ while (finfo->uncompressed_position != offset) { PHYSFS_uint8 buf[512]; PHYSFS_uint32 maxread; maxread = (PHYSFS_uint32) (offset - finfo->uncompressed_position); if (maxread > sizeof (buf)) maxread = sizeof (buf); if (ZIP_read(_io, buf, maxread) != maxread) return 0; } /* while */ } /* else */ return 1; } /* ZIP_seek */ static PHYSFS_sint64 ZIP_length(PHYSFS_Io *io) { const ZIPfileinfo *finfo = (ZIPfileinfo *) io->opaque; return (PHYSFS_sint64) finfo->entry->uncompressed_size; } /* ZIP_length */ static PHYSFS_Io *zip_get_io(PHYSFS_Io *io, ZIPinfo *inf, ZIPentry *entry); static PHYSFS_Io *ZIP_duplicate(PHYSFS_Io *io) { ZIPfileinfo *origfinfo = (ZIPfileinfo *) io->opaque; PHYSFS_Io *retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io)); ZIPfileinfo *finfo = (ZIPfileinfo *) allocator.Malloc(sizeof (ZIPfileinfo)); GOTO_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, failed); GOTO_IF_MACRO(!finfo, PHYSFS_ERR_OUT_OF_MEMORY, failed); memset(finfo, '\0', sizeof (*finfo)); finfo->entry = origfinfo->entry; finfo->io = zip_get_io(origfinfo->io, NULL, finfo->entry); GOTO_IF_MACRO(!finfo->io, ERRPASS, failed); if (finfo->entry->compression_method != COMPMETH_NONE) { finfo->buffer = (PHYSFS_uint8 *) allocator.Malloc(ZIP_READBUFSIZE); GOTO_IF_MACRO(!finfo->buffer, PHYSFS_ERR_OUT_OF_MEMORY, failed); if (zlib_err(inflateInit2(&finfo->stream, -MAX_WBITS)) != Z_OK) goto failed; } /* if */ memcpy(retval, io, sizeof (PHYSFS_Io)); retval->opaque = finfo; return retval; failed: if (finfo != NULL) { if (finfo->io != NULL) finfo->io->destroy(finfo->io); if (finfo->buffer != NULL) { allocator.Free(finfo->buffer); inflateEnd(&finfo->stream); } /* if */ allocator.Free(finfo); } /* if */ if (retval != NULL) allocator.Free(retval); return NULL; } /* ZIP_duplicate */ static int ZIP_flush(PHYSFS_Io *io) { return 1; /* no write support. */ } static void ZIP_destroy(PHYSFS_Io *io) { ZIPfileinfo *finfo = (ZIPfileinfo *) io->opaque; finfo->io->destroy(finfo->io); if (finfo->entry->compression_method != COMPMETH_NONE) inflateEnd(&finfo->stream); if (finfo->buffer != NULL) allocator.Free(finfo->buffer); allocator.Free(finfo); allocator.Free(io); } /* ZIP_destroy */ static const PHYSFS_Io ZIP_Io = { CURRENT_PHYSFS_IO_API_VERSION, NULL, ZIP_read, ZIP_write, ZIP_seek, ZIP_tell, ZIP_length, ZIP_duplicate, ZIP_flush, ZIP_destroy }; static PHYSFS_sint64 zip_find_end_of_central_dir(PHYSFS_Io *io, PHYSFS_sint64 *len) { PHYSFS_uint8 buf[256]; PHYSFS_uint8 extra[4] = { 0, 0, 0, 0 }; PHYSFS_sint32 i = 0; PHYSFS_sint64 filelen; PHYSFS_sint64 filepos; PHYSFS_sint32 maxread; PHYSFS_sint32 totalread = 0; int found = 0; filelen = io->length(io); BAIL_IF_MACRO(filelen == -1, ERRPASS, -1); /* * Jump to the end of the file and start reading backwards. * The last thing in the file is the zipfile comment, which is variable * length, and the field that specifies its size is before it in the * file (argh!)...this means that we need to scan backwards until we * hit the end-of-central-dir signature. We can then sanity check that * the comment was as big as it should be to make sure we're in the * right place. The comment length field is 16 bits, so we can stop * searching for that signature after a little more than 64k at most, * and call it a corrupted zipfile. */ if (sizeof (buf) < filelen) { filepos = filelen - sizeof (buf); maxread = sizeof (buf); } /* if */ else { filepos = 0; maxread = (PHYSFS_uint32) filelen; } /* else */ while ((totalread < filelen) && (totalread < 65557)) { BAIL_IF_MACRO(!io->seek(io, filepos), ERRPASS, -1); /* make sure we catch a signature between buffers. */ if (totalread != 0) { if (!__PHYSFS_readAll(io, buf, maxread - 4)) return -1; memcpy(&buf[maxread - 4], &extra, sizeof (extra)); totalread += maxread - 4; } /* if */ else { if (!__PHYSFS_readAll(io, buf, maxread)) return -1; totalread += maxread; } /* else */ memcpy(&extra, buf, sizeof (extra)); for (i = maxread - 4; i > 0; i--) { if ((buf[i + 0] == 0x50) && (buf[i + 1] == 0x4B) && (buf[i + 2] == 0x05) && (buf[i + 3] == 0x06) ) { found = 1; /* that's the signature! */ break; } /* if */ } /* for */ if (found) break; filepos -= (maxread - 4); if (filepos < 0) filepos = 0; } /* while */ BAIL_IF_MACRO(!found, PHYSFS_ERR_UNSUPPORTED, -1); if (len != NULL) *len = filelen; return (filepos + i); } /* zip_find_end_of_central_dir */ static int isZip(PHYSFS_Io *io) { PHYSFS_uint32 sig = 0; int retval = 0; /* * The first thing in a zip file might be the signature of the * first local file record, so it makes for a quick determination. */ if (readui32(io, &sig)) { retval = (sig == ZIP_LOCAL_FILE_SIG); if (!retval) { /* * No sig...might be a ZIP with data at the start * (a self-extracting executable, etc), so we'll have to do * it the hard way... */ retval = (zip_find_end_of_central_dir(io, NULL) != -1); } /* if */ } /* if */ return retval; } /* isZip */ static void zip_free_entries(ZIPentry *entries, PHYSFS_uint64 max) { PHYSFS_uint64 i; for (i = 0; i < max; i++) { ZIPentry *entry = &entries[i]; if (entry->name != NULL) allocator.Free(entry->name); } /* for */ allocator.Free(entries); } /* zip_free_entries */ /* * This will find the ZIPentry associated with a path in platform-independent * notation. Directories don't have ZIPentries associated with them, but * (*isDir) will be set to non-zero if a dir was hit. */ static ZIPentry *zip_find_entry(const ZIPinfo *info, const char *path, int *isDir) { ZIPentry *a = info->entries; PHYSFS_sint32 pathlen = (PHYSFS_sint32) strlen(path); PHYSFS_sint64 lo = 0; PHYSFS_sint64 hi = (PHYSFS_sint64) (info->entryCount - 1); PHYSFS_sint64 middle; const char *thispath = NULL; int rc; while (lo <= hi) { middle = lo + ((hi - lo) / 2); thispath = a[middle].name; rc = strncmp(path, thispath, pathlen); if (rc > 0) lo = middle + 1; else if (rc < 0) hi = middle - 1; else /* substring match...might be dir or entry or nothing. */ { if (isDir != NULL) { *isDir = (thispath[pathlen] == '/'); if (*isDir) return NULL; } /* if */ if (thispath[pathlen] == '\0') /* found entry? */ return &a[middle]; /* adjust search params, try again. */ else if (thispath[pathlen] > '/') hi = middle - 1; else lo = middle + 1; } /* if */ } /* while */ if (isDir != NULL) *isDir = 0; BAIL_MACRO(PHYSFS_ERR_NOT_FOUND, NULL); } /* zip_find_entry */ /* Convert paths from old, buggy DOS zippers... */ static void zip_convert_dos_path(ZIPentry *entry, char *path) { PHYSFS_uint8 hosttype = (PHYSFS_uint8) ((entry->version >> 8) & 0xFF); if (hosttype == 0) /* FS_FAT_ */ { while (*path) { if (*path == '\\') *path = '/'; path++; } /* while */ } /* if */ } /* zip_convert_dos_path */ static void zip_expand_symlink_path(char *path) { char *ptr = path; char *prevptr = path; while (1) { ptr = strchr(ptr, '/'); if (ptr == NULL) break; if (*(ptr + 1) == '.') { if (*(ptr + 2) == '/') { /* current dir in middle of string: ditch it. */ memmove(ptr, ptr + 2, strlen(ptr + 2) + 1); } /* else if */ else if (*(ptr + 2) == '\0') { /* current dir at end of string: ditch it. */ *ptr = '\0'; } /* else if */ else if (*(ptr + 2) == '.') { if (*(ptr + 3) == '/') { /* parent dir in middle: move back one, if possible. */ memmove(prevptr, ptr + 4, strlen(ptr + 4) + 1); ptr = prevptr; while (prevptr != path) { prevptr--; if (*prevptr == '/') { prevptr++; break; } /* if */ } /* while */ } /* if */ if (*(ptr + 3) == '\0') { /* parent dir at end: move back one, if possible. */ *prevptr = '\0'; } /* if */ } /* if */ } /* if */ else { prevptr = ptr; ptr++; } /* else */ } /* while */ } /* zip_expand_symlink_path */ /* (forward reference: zip_follow_symlink and zip_resolve call each other.) */ static int zip_resolve(PHYSFS_Io *io, ZIPinfo *info, ZIPentry *entry); /* * Look for the entry named by (path). If it exists, resolve it, and return * a pointer to that entry. If it's another symlink, keep resolving until you * hit a real file and then return a pointer to the final non-symlink entry. * If there's a problem, return NULL. */ static ZIPentry *zip_follow_symlink(PHYSFS_Io *io, ZIPinfo *info, char *path) { ZIPentry *entry; zip_expand_symlink_path(path); entry = zip_find_entry(info, path, NULL); if (entry != NULL) { if (!zip_resolve(io, info, entry)) /* recursive! */ entry = NULL; else { if (entry->symlink != NULL) entry = entry->symlink; } /* else */ } /* if */ return entry; } /* zip_follow_symlink */ static int zip_resolve_symlink(PHYSFS_Io *io, ZIPinfo *info, ZIPentry *entry) { const PHYSFS_uint64 size = entry->uncompressed_size; char *path = NULL; int rc = 0; /* * We've already parsed the local file header of the symlink at this * point. Now we need to read the actual link from the file data and * follow it. */ BAIL_IF_MACRO(!io->seek(io, entry->offset), ERRPASS, 0); path = (char *) __PHYSFS_smallAlloc(size + 1); BAIL_IF_MACRO(!path, PHYSFS_ERR_OUT_OF_MEMORY, 0); if (entry->compression_method == COMPMETH_NONE) rc = __PHYSFS_readAll(io, path, size); else /* symlink target path is compressed... */ { z_stream stream; const PHYSFS_uint64 complen = entry->compressed_size; PHYSFS_uint8 *compressed = (PHYSFS_uint8*) __PHYSFS_smallAlloc(complen); if (compressed != NULL) { if (__PHYSFS_readAll(io, compressed, complen)) { initializeZStream(&stream); stream.next_in = compressed; stream.avail_in = complen; stream.next_out = (unsigned char *) path; stream.avail_out = size; if (zlib_err(inflateInit2(&stream, -MAX_WBITS)) == Z_OK) { rc = zlib_err(inflate(&stream, Z_FINISH)); inflateEnd(&stream); /* both are acceptable outcomes... */ rc = ((rc == Z_OK) || (rc == Z_STREAM_END)); } /* if */ } /* if */ __PHYSFS_smallFree(compressed); } /* if */ } /* else */ if (rc) { path[entry->uncompressed_size] = '\0'; /* null-terminate it. */ zip_convert_dos_path(entry, path); entry->symlink = zip_follow_symlink(io, info, path); } /* else */ __PHYSFS_smallFree(path); return (entry->symlink != NULL); } /* zip_resolve_symlink */ /* * Parse the local file header of an entry, and update entry->offset. */ static int zip_parse_local(PHYSFS_Io *io, ZIPentry *entry) { PHYSFS_uint32 ui32; PHYSFS_uint16 ui16; PHYSFS_uint16 fnamelen; PHYSFS_uint16 extralen; /* * crc and (un)compressed_size are always zero if this is a "JAR" * archive created with Sun's Java tools, apparently. We only * consider this archive corrupted if those entries don't match and * aren't zero. That seems to work well. * We also ignore a mismatch if the value is 0xFFFFFFFF here, since it's * possible that's a Zip64 thing. */ BAIL_IF_MACRO(!io->seek(io, entry->offset), ERRPASS, 0); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 != ZIP_LOCAL_FILE_SIG, PHYSFS_ERR_CORRUPT, 0); BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); BAIL_IF_MACRO(ui16 != entry->version_needed, PHYSFS_ERR_CORRUPT, 0); BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); /* general bits. */ BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); BAIL_IF_MACRO(ui16 != entry->compression_method, PHYSFS_ERR_CORRUPT, 0); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); /* date/time */ BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 && (ui32 != entry->crc), PHYSFS_ERR_CORRUPT, 0); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 && (ui32 != 0xFFFFFFFF) && (ui32 != entry->compressed_size), PHYSFS_ERR_CORRUPT, 0); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 && (ui32 != 0xFFFFFFFF) && (ui32 != entry->uncompressed_size), PHYSFS_ERR_CORRUPT, 0); BAIL_IF_MACRO(!readui16(io, &fnamelen), ERRPASS, 0); BAIL_IF_MACRO(!readui16(io, &extralen), ERRPASS, 0); entry->offset += fnamelen + extralen + 30; return 1; } /* zip_parse_local */ static int zip_resolve(PHYSFS_Io *io, ZIPinfo *info, ZIPentry *entry) { int retval = 1; ZipResolveType resolve_type = entry->resolved; /* Don't bother if we've failed to resolve this entry before. */ BAIL_IF_MACRO(resolve_type == ZIP_BROKEN_FILE, PHYSFS_ERR_CORRUPT, 0); BAIL_IF_MACRO(resolve_type == ZIP_BROKEN_SYMLINK, PHYSFS_ERR_CORRUPT, 0); /* uhoh...infinite symlink loop! */ BAIL_IF_MACRO(resolve_type == ZIP_RESOLVING, PHYSFS_ERR_SYMLINK_LOOP, 0); /* * We fix up the offset to point to the actual data on the * first open, since we don't want to seek across the whole file on * archive open (can be SLOW on large, CD-stored files), but we * need to check the local file header...not just for corruption, * but since it stores offset info the central directory does not. */ if (resolve_type != ZIP_RESOLVED) { entry->resolved = ZIP_RESOLVING; retval = zip_parse_local(io, entry); if (retval) { /* * If it's a symlink, find the original file. This will cause * resolution of other entries (other symlinks and, eventually, * the real file) if all goes well. */ if (resolve_type == ZIP_UNRESOLVED_SYMLINK) retval = zip_resolve_symlink(io, info, entry); } /* if */ if (resolve_type == ZIP_UNRESOLVED_SYMLINK) entry->resolved = ((retval) ? ZIP_RESOLVED : ZIP_BROKEN_SYMLINK); else if (resolve_type == ZIP_UNRESOLVED_FILE) entry->resolved = ((retval) ? ZIP_RESOLVED : ZIP_BROKEN_FILE); } /* if */ return retval; } /* zip_resolve */ static int zip_version_does_symlinks(PHYSFS_uint32 version) { int retval = 0; PHYSFS_uint8 hosttype = (PHYSFS_uint8) ((version >> 8) & 0xFF); switch (hosttype) { /* * These are the platforms that can NOT build an archive with * symlinks, according to the Info-ZIP project. */ case 0: /* FS_FAT_ */ case 1: /* AMIGA_ */ case 2: /* VMS_ */ case 4: /* VM_CSM_ */ case 6: /* FS_HPFS_ */ case 11: /* FS_NTFS_ */ case 14: /* FS_VFAT_ */ case 13: /* ACORN_ */ case 15: /* MVS_ */ case 18: /* THEOS_ */ break; /* do nothing. */ default: /* assume the rest to be unix-like. */ retval = 1; break; } /* switch */ return retval; } /* zip_version_does_symlinks */ static int zip_entry_is_symlink(const ZIPentry *entry) { return ((entry->resolved == ZIP_UNRESOLVED_SYMLINK) || (entry->resolved == ZIP_BROKEN_SYMLINK) || (entry->symlink)); } /* zip_entry_is_symlink */ static int zip_has_symlink_attr(ZIPentry *entry, PHYSFS_uint32 extern_attr) { PHYSFS_uint16 xattr = ((extern_attr >> 16) & 0xFFFF); return ( (zip_version_does_symlinks(entry->version)) && (entry->uncompressed_size > 0) && ((xattr & UNIX_FILETYPE_MASK) == UNIX_FILETYPE_SYMLINK) ); } /* zip_has_symlink_attr */ static PHYSFS_sint64 zip_dos_time_to_physfs_time(PHYSFS_uint32 dostime) { PHYSFS_uint32 dosdate; struct tm unixtime; memset(&unixtime, '\0', sizeof (unixtime)); dosdate = (PHYSFS_uint32) ((dostime >> 16) & 0xFFFF); dostime &= 0xFFFF; /* dissect date */ unixtime.tm_year = ((dosdate >> 9) & 0x7F) + 80; unixtime.tm_mon = ((dosdate >> 5) & 0x0F) - 1; unixtime.tm_mday = ((dosdate ) & 0x1F); /* dissect time */ unixtime.tm_hour = ((dostime >> 11) & 0x1F); unixtime.tm_min = ((dostime >> 5) & 0x3F); unixtime.tm_sec = ((dostime << 1) & 0x3E); /* let mktime calculate daylight savings time. */ unixtime.tm_isdst = -1; return ((PHYSFS_sint64) mktime(&unixtime)); } /* zip_dos_time_to_physfs_time */ static int zip_load_entry(PHYSFS_Io *io, const int zip64, ZIPentry *entry, PHYSFS_uint64 ofs_fixup) { PHYSFS_uint16 fnamelen, extralen, commentlen; PHYSFS_uint32 external_attr; PHYSFS_uint32 starting_disk; PHYSFS_uint64 offset; PHYSFS_uint16 ui16; PHYSFS_uint32 ui32; PHYSFS_sint64 si64; /* sanity check with central directory signature... */ BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 != ZIP_CENTRAL_DIR_SIG, PHYSFS_ERR_CORRUPT, 0); /* Get the pertinent parts of the record... */ BAIL_IF_MACRO(!readui16(io, &entry->version), ERRPASS, 0); BAIL_IF_MACRO(!readui16(io, &entry->version_needed), ERRPASS, 0); BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); /* general bits */ BAIL_IF_MACRO(!readui16(io, &entry->compression_method), ERRPASS, 0); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); entry->last_mod_time = zip_dos_time_to_physfs_time(ui32); BAIL_IF_MACRO(!readui32(io, &entry->crc), ERRPASS, 0); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); entry->compressed_size = (PHYSFS_uint64) ui32; BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); entry->uncompressed_size = (PHYSFS_uint64) ui32; BAIL_IF_MACRO(!readui16(io, &fnamelen), ERRPASS, 0); BAIL_IF_MACRO(!readui16(io, &extralen), ERRPASS, 0); BAIL_IF_MACRO(!readui16(io, &commentlen), ERRPASS, 0); BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); starting_disk = (PHYSFS_uint32) ui16; BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); /* internal file attribs */ BAIL_IF_MACRO(!readui32(io, &external_attr), ERRPASS, 0); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); offset = (PHYSFS_uint64) ui32; entry->symlink = NULL; /* will be resolved later, if necessary. */ entry->resolved = (zip_has_symlink_attr(entry, external_attr)) ? ZIP_UNRESOLVED_SYMLINK : ZIP_UNRESOLVED_FILE; entry->name = (char *) allocator.Malloc(fnamelen + 1); BAIL_IF_MACRO(entry->name == NULL, PHYSFS_ERR_OUT_OF_MEMORY, 0); if (!__PHYSFS_readAll(io, entry->name, fnamelen)) goto zip_load_entry_puked; entry->name[fnamelen] = '\0'; /* null-terminate the filename. */ zip_convert_dos_path(entry, entry->name); si64 = io->tell(io); if (si64 == -1) goto zip_load_entry_puked; /* * The actual sizes didn't fit in 32-bits; look for the Zip64 * extended information extra field... */ if ( (zip64) && ((offset == 0xFFFFFFFF) || (starting_disk == 0xFFFFFFFF) || (entry->compressed_size == 0xFFFFFFFF) || (entry->uncompressed_size == 0xFFFFFFFF)) ) { int found = 0; PHYSFS_uint16 sig, len; while (extralen > 4) { if (!readui16(io, &sig)) goto zip_load_entry_puked; else if (!readui16(io, &len)) goto zip_load_entry_puked; si64 += 4 + len; extralen -= 4 + len; if (sig != ZIP64_EXTENDED_INFO_EXTRA_FIELD_SIG) { if (!io->seek(io, si64)) goto zip_load_entry_puked; continue; } /* if */ found = 1; break; } /* while */ GOTO_IF_MACRO(!found, PHYSFS_ERR_CORRUPT, zip_load_entry_puked); if (entry->uncompressed_size == 0xFFFFFFFF) { GOTO_IF_MACRO(len < 8, PHYSFS_ERR_CORRUPT, zip_load_entry_puked); if (!readui64(io, &entry->uncompressed_size)) goto zip_load_entry_puked; len -= 8; } /* if */ if (entry->compressed_size == 0xFFFFFFFF) { GOTO_IF_MACRO(len < 8, PHYSFS_ERR_CORRUPT, zip_load_entry_puked); if (!readui64(io, &entry->compressed_size)) goto zip_load_entry_puked; len -= 8; } /* if */ if (offset == 0xFFFFFFFF) { GOTO_IF_MACRO(len < 8, PHYSFS_ERR_CORRUPT, zip_load_entry_puked); if (!readui64(io, &offset)) goto zip_load_entry_puked; len -= 8; } /* if */ if (starting_disk == 0xFFFFFFFF) { GOTO_IF_MACRO(len < 8, PHYSFS_ERR_CORRUPT, zip_load_entry_puked); if (!readui32(io, &starting_disk)) goto zip_load_entry_puked; len -= 4; } /* if */ GOTO_IF_MACRO(len != 0, PHYSFS_ERR_CORRUPT, zip_load_entry_puked); } /* if */ GOTO_IF_MACRO(starting_disk != 0, PHYSFS_ERR_CORRUPT, zip_load_entry_puked); entry->offset = offset + ofs_fixup; /* seek to the start of the next entry in the central directory... */ if (!io->seek(io, si64 + extralen + commentlen)) goto zip_load_entry_puked; return 1; /* success. */ zip_load_entry_puked: allocator.Free(entry->name); return 0; /* failure. */ } /* zip_load_entry */ static int zip_entry_cmp(void *_a, size_t one, size_t two) { if (one != two) { const ZIPentry *a = (const ZIPentry *) _a; return strcmp(a[one].name, a[two].name); } /* if */ return 0; } /* zip_entry_cmp */ static void zip_entry_swap(void *_a, size_t one, size_t two) { if (one != two) { ZIPentry tmp; ZIPentry *first = &(((ZIPentry *) _a)[one]); ZIPentry *second = &(((ZIPentry *) _a)[two]); memcpy(&tmp, first, sizeof (ZIPentry)); memcpy(first, second, sizeof (ZIPentry)); memcpy(second, &tmp, sizeof (ZIPentry)); } /* if */ } /* zip_entry_swap */ static int zip_load_entries(PHYSFS_Io *io, ZIPinfo *info, const PHYSFS_uint64 data_ofs, const PHYSFS_uint64 central_ofs) { const PHYSFS_uint64 max = info->entryCount; const int zip64 = info->zip64; PHYSFS_uint64 i; BAIL_IF_MACRO(!io->seek(io, central_ofs), ERRPASS, 0); info->entries = (ZIPentry *) allocator.Malloc(sizeof (ZIPentry) * max); BAIL_IF_MACRO(!info->entries, PHYSFS_ERR_OUT_OF_MEMORY, 0); for (i = 0; i < max; i++) { if (!zip_load_entry(io, zip64, &info->entries[i], data_ofs)) { zip_free_entries(info->entries, i); return 0; } /* if */ } /* for */ __PHYSFS_sort(info->entries, (size_t) max, zip_entry_cmp, zip_entry_swap); return 1; } /* zip_load_entries */ static PHYSFS_sint64 zip64_find_end_of_central_dir(PHYSFS_Io *io, PHYSFS_sint64 _pos, PHYSFS_uint64 offset) { /* * Naturally, the offset is useless to us; it is the offset from the * start of file, which is meaningless if we've appended this .zip to * a self-extracting .exe. We need to find this on our own. It should * be directly before the locator record, but the record in question, * like the original end-of-central-directory record, ends with a * variable-length field. Unlike the original, which has to store the * size of that variable-length field in a 16-bit int and thus has to be * within 64k, the new one gets 64-bits. * * Fortunately, the only currently-specified record for that variable * length block is some weird proprietary thing that deals with EBCDIC * and tape backups or something. So we don't seek far. */ PHYSFS_uint32 ui32; const PHYSFS_uint64 pos = (PHYSFS_uint64) _pos; assert(_pos > 0); /* Try offset specified in the Zip64 end of central directory locator. */ /* This works if the entire PHYSFS_Io is the zip file. */ BAIL_IF_MACRO(!io->seek(io, offset), ERRPASS, -1); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, -1); if (ui32 == ZIP64_END_OF_CENTRAL_DIR_SIG) return offset; /* Try 56 bytes before the Zip64 end of central directory locator. */ /* This works if the record isn't variable length and is version 1. */ if (pos > 56) { BAIL_IF_MACRO(!io->seek(io, pos-56), ERRPASS, -1); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, -1); if (ui32 == ZIP64_END_OF_CENTRAL_DIR_SIG) return pos-56; } /* if */ /* Try 84 bytes before the Zip64 end of central directory locator. */ /* This works if the record isn't variable length and is version 2. */ if (pos > 84) { BAIL_IF_MACRO(!io->seek(io, pos-84), ERRPASS, -1); BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, -1); if (ui32 == ZIP64_END_OF_CENTRAL_DIR_SIG) return pos-84; } /* if */ /* Ok, brute force: we know it's between (offset) and (pos) somewhere. */ /* Just try moving back at most 256k. Oh well. */ if ((offset < pos) && (pos > 4)) { /* we assume you can eat this stack if you handle Zip64 files. */ PHYSFS_uint8 buf[256 * 1024]; PHYSFS_uint64 len = pos - offset; PHYSFS_sint32 i; if (len > sizeof (buf)) len = sizeof (buf); BAIL_IF_MACRO(!io->seek(io, pos - len), ERRPASS, -1); BAIL_IF_MACRO(!__PHYSFS_readAll(io, buf, len), ERRPASS, -1); for (i = (PHYSFS_sint32) (len - 4); i >= 0; i--) { if (buf[i] != 0x50) continue; if ( (buf[i+1] == 0x4b) && (buf[i+2] == 0x06) && (buf[i+3] == 0x06) ) return pos - (len - i); } /* for */ } /* if */ BAIL_MACRO(PHYSFS_ERR_CORRUPT, -1); /* didn't find it. */ } /* zip64_find_end_of_central_dir */ static int zip64_parse_end_of_central_dir(PHYSFS_Io *io, ZIPinfo *info, PHYSFS_uint64 *data_start, PHYSFS_uint64 *dir_ofs, PHYSFS_sint64 pos) { PHYSFS_uint64 ui64; PHYSFS_uint32 ui32; PHYSFS_uint16 ui16; /* We should be positioned right past the locator signature. */ if ((pos < 0) || (!io->seek(io, pos))) return 0; BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); if (ui32 != ZIP64_END_OF_CENTRAL_DIRECTORY_LOCATOR_SIG) return -1; /* it's not a Zip64 archive. Not an error, though! */ info->zip64 = 1; /* number of the disk with the start of the central directory. */ BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 != 0, PHYSFS_ERR_CORRUPT, 0); /* offset of Zip64 end of central directory record. */ BAIL_IF_MACRO(!readui64(io, &ui64), ERRPASS, 0); /* total number of disks */ BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 != 1, PHYSFS_ERR_CORRUPT, 0); pos = zip64_find_end_of_central_dir(io, pos, ui64); if (pos < 0) return 0; /* oh well. */ /* * For self-extracting archives, etc, there's crapola in the file * before the zipfile records; we calculate how much data there is * prepended by determining how far the zip64-end-of-central-directory * offset is from where it is supposed to be...the difference in bytes * is how much arbitrary data is at the start of the physical file. */ assert(((PHYSFS_uint64) pos) >= ui64); *data_start = ((PHYSFS_uint64) pos) - ui64; BAIL_IF_MACRO(!io->seek(io, pos), ERRPASS, 0); /* check signature again, just in case. */ BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 != ZIP64_END_OF_CENTRAL_DIR_SIG, PHYSFS_ERR_CORRUPT, 0); /* size of Zip64 end of central directory record. */ BAIL_IF_MACRO(!readui64(io, &ui64), ERRPASS, 0); /* version made by. */ BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); /* version needed to extract. */ BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); /* number of this disk. */ BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 != 0, PHYSFS_ERR_CORRUPT, 0); /* number of disk with start of central directory record. */ BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 != 0, PHYSFS_ERR_CORRUPT, 0); /* total number of entries in the central dir on this disk */ BAIL_IF_MACRO(!readui64(io, &ui64), ERRPASS, 0); /* total number of entries in the central dir */ BAIL_IF_MACRO(!readui64(io, &info->entryCount), ERRPASS, 0); BAIL_IF_MACRO(ui64 != info->entryCount, PHYSFS_ERR_CORRUPT, 0); /* size of the central directory */ BAIL_IF_MACRO(!readui64(io, &ui64), ERRPASS, 0); /* offset of central directory */ BAIL_IF_MACRO(!readui64(io, dir_ofs), ERRPASS, 0); /* Since we know the difference, fix up the central dir offset... */ *dir_ofs += *data_start; /* * There are more fields here, for encryption and feature-specific things, * but we don't care about any of them at the moment. */ return 1; /* made it. */ } /* zip64_parse_end_of_central_dir */ static int zip_parse_end_of_central_dir(PHYSFS_Io *io, ZIPinfo *info, PHYSFS_uint64 *data_start, PHYSFS_uint64 *dir_ofs) { PHYSFS_uint16 entryCount16; PHYSFS_uint32 offset32; PHYSFS_uint32 ui32; PHYSFS_uint16 ui16; PHYSFS_sint64 len; PHYSFS_sint64 pos; int rc; /* find the end-of-central-dir record, and seek to it. */ pos = zip_find_end_of_central_dir(io, &len); BAIL_IF_MACRO(pos == -1, ERRPASS, 0); BAIL_IF_MACRO(!io->seek(io, pos), ERRPASS, 0); /* check signature again, just in case. */ BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); BAIL_IF_MACRO(ui32 != ZIP_END_OF_CENTRAL_DIR_SIG, PHYSFS_ERR_CORRUPT, 0); /* Seek back to see if "Zip64 end of central directory locator" exists. */ /* this record is 20 bytes before end-of-central-dir */ rc = zip64_parse_end_of_central_dir(io, info, data_start, dir_ofs, pos-20); BAIL_IF_MACRO(rc == 0, ERRPASS, 0); if (rc == 1) return 1; /* we're done here. */ assert(rc == -1); /* no error, just not a Zip64 archive. */ /* Not Zip64? Seek back to where we were and keep processing. */ BAIL_IF_MACRO(!io->seek(io, pos + 4), ERRPASS, 0); /* number of this disk */ BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); BAIL_IF_MACRO(ui16 != 0, PHYSFS_ERR_CORRUPT, 0); /* number of the disk with the start of the central directory */ BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); BAIL_IF_MACRO(ui16 != 0, PHYSFS_ERR_CORRUPT, 0); /* total number of entries in the central dir on this disk */ BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); /* total number of entries in the central dir */ BAIL_IF_MACRO(!readui16(io, &entryCount16), ERRPASS, 0); BAIL_IF_MACRO(ui16 != entryCount16, PHYSFS_ERR_CORRUPT, 0); info->entryCount = entryCount16; /* size of the central directory */ BAIL_IF_MACRO(!readui32(io, &ui32), ERRPASS, 0); /* offset of central directory */ BAIL_IF_MACRO(!readui32(io, &offset32), ERRPASS, 0); *dir_ofs = (PHYSFS_uint64) offset32; BAIL_IF_MACRO(pos < (*dir_ofs + ui32), PHYSFS_ERR_CORRUPT, 0); /* * For self-extracting archives, etc, there's crapola in the file * before the zipfile records; we calculate how much data there is * prepended by determining how far the central directory offset is * from where it is supposed to be (start of end-of-central-dir minus * sizeof central dir)...the difference in bytes is how much arbitrary * data is at the start of the physical file. */ *data_start = (PHYSFS_uint64) (pos - (*dir_ofs + ui32)); /* Now that we know the difference, fix up the central dir offset... */ *dir_ofs += *data_start; /* zipfile comment length */ BAIL_IF_MACRO(!readui16(io, &ui16), ERRPASS, 0); /* * Make sure that the comment length matches to the end of file... * If it doesn't, we're either in the wrong part of the file, or the * file is corrupted, but we give up either way. */ BAIL_IF_MACRO((pos + 22 + ui16) != len, PHYSFS_ERR_CORRUPT, 0); return 1; /* made it. */ } /* zip_parse_end_of_central_dir */ static void *ZIP_openArchive(PHYSFS_Io *io, const char *name, int forWriting) { ZIPinfo *info = NULL; PHYSFS_uint64 data_start; PHYSFS_uint64 cent_dir_ofs; assert(io != NULL); /* shouldn't ever happen. */ BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL); BAIL_IF_MACRO(!isZip(io), ERRPASS, NULL); info = (ZIPinfo *) allocator.Malloc(sizeof (ZIPinfo)); BAIL_IF_MACRO(!info, PHYSFS_ERR_OUT_OF_MEMORY, NULL); memset(info, '\0', sizeof (ZIPinfo)); info->io = io; if (!zip_parse_end_of_central_dir(io, info, &data_start, ¢_dir_ofs)) goto ZIP_openarchive_failed; if (!zip_load_entries(io, info, data_start, cent_dir_ofs)) goto ZIP_openarchive_failed; return info; ZIP_openarchive_failed: if (info != NULL) allocator.Free(info); return NULL; } /* ZIP_openArchive */ static PHYSFS_sint64 zip_find_start_of_dir(ZIPinfo *info, const char *path, int stop_on_first_find) { PHYSFS_sint64 lo = 0; PHYSFS_sint64 hi = (PHYSFS_sint64) (info->entryCount - 1); PHYSFS_sint64 middle; PHYSFS_uint32 dlen = (PHYSFS_uint32) strlen(path); PHYSFS_sint64 retval = -1; const char *name; int rc; if (*path == '\0') /* root dir? */ return 0; if ((dlen > 0) && (path[dlen - 1] == '/')) /* ignore trailing slash. */ dlen--; while (lo <= hi) { middle = lo + ((hi - lo) / 2); name = info->entries[middle].name; rc = strncmp(path, name, dlen); if (rc == 0) { char ch = name[dlen]; if ('/' < ch) /* make sure this isn't just a substr match. */ rc = -1; else if ('/' > ch) rc = 1; else { if (stop_on_first_find) /* Just checking dir's existance? */ return middle; if (name[dlen + 1] == '\0') /* Skip initial dir entry. */ return (middle + 1); /* there might be more entries earlier in the list. */ retval = middle; hi = middle - 1; } /* else */ } /* if */ if (rc > 0) lo = middle + 1; else hi = middle - 1; } /* while */ return retval; } /* zip_find_start_of_dir */ /* * Moved to seperate function so we can use alloca then immediately throw * away the allocated stack space... */ static void doEnumCallback(PHYSFS_EnumFilesCallback cb, void *callbackdata, const char *odir, const char *str, PHYSFS_sint32 ln) { char *newstr = __PHYSFS_smallAlloc(ln + 1); if (newstr == NULL) return; memcpy(newstr, str, ln); newstr[ln] = '\0'; cb(callbackdata, odir, newstr); __PHYSFS_smallFree(newstr); } /* doEnumCallback */ static void ZIP_enumerateFiles(void *opaque, const char *dname, PHYSFS_EnumFilesCallback cb, const char *origdir, void *callbackdata) { ZIPinfo *info = ((ZIPinfo *) opaque); PHYSFS_sint32 dlen, dlen_inc; PHYSFS_sint64 i, max; i = zip_find_start_of_dir(info, dname, 0); if (i == -1) /* no such directory. */ return; dlen = (PHYSFS_sint32) strlen(dname); if ((dlen > 0) && (dname[dlen - 1] == '/')) /* ignore trailing slash. */ dlen--; dlen_inc = ((dlen > 0) ? 1 : 0) + dlen; max = (PHYSFS_sint64) info->entryCount; while (i < max) { char *e = info->entries[i].name; if ((dlen) && ((strncmp(e, dname, dlen) != 0) || (e[dlen] != '/'))) break; /* past end of this dir; we're done. */ else { char *add = e + dlen_inc; char *ptr = strchr(add, '/'); PHYSFS_sint32 ln = (PHYSFS_sint32) ((ptr) ? ptr-add : strlen(add)); doEnumCallback(cb, callbackdata, origdir, add, ln); ln += dlen_inc; /* point past entry to children... */ /* increment counter and skip children of subdirs... */ while ((++i < max) && (ptr != NULL)) { char *e_new = info->entries[i].name; if ((strncmp(e, e_new, ln) != 0) || (e_new[ln] != '/')) break; } /* while */ } /* else */ } /* while */ } /* ZIP_enumerateFiles */ static PHYSFS_Io *zip_get_io(PHYSFS_Io *io, ZIPinfo *inf, ZIPentry *entry) { int success; PHYSFS_Io *retval = io->duplicate(io); BAIL_IF_MACRO(!retval, ERRPASS, NULL); /* !!! FIXME: if you open a dir here, it should bail ERR_NOT_A_FILE */ /* (inf) can be NULL if we already resolved. */ success = (inf == NULL) || zip_resolve(retval, inf, entry); if (success) { PHYSFS_sint64 offset; offset = ((entry->symlink) ? entry->symlink->offset : entry->offset); success = retval->seek(retval, offset); } /* if */ if (!success) { retval->destroy(retval); retval = NULL; } /* if */ return retval; } /* zip_get_io */ static PHYSFS_Io *ZIP_openRead(void *opaque, const char *filename) { PHYSFS_Io *retval = NULL; ZIPinfo *info = (ZIPinfo *) opaque; ZIPentry *entry = zip_find_entry(info, filename, NULL); ZIPfileinfo *finfo = NULL; BAIL_IF_MACRO(!entry, ERRPASS, NULL); retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io)); GOTO_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, ZIP_openRead_failed); finfo = (ZIPfileinfo *) allocator.Malloc(sizeof (ZIPfileinfo)); GOTO_IF_MACRO(!finfo, PHYSFS_ERR_OUT_OF_MEMORY, ZIP_openRead_failed); memset(finfo, '\0', sizeof (ZIPfileinfo)); finfo->io = zip_get_io(info->io, info, entry); GOTO_IF_MACRO(!finfo->io, ERRPASS, ZIP_openRead_failed); finfo->entry = ((entry->symlink != NULL) ? entry->symlink : entry); initializeZStream(&finfo->stream); if (finfo->entry->compression_method != COMPMETH_NONE) { finfo->buffer = (PHYSFS_uint8 *) allocator.Malloc(ZIP_READBUFSIZE); if (!finfo->buffer) GOTO_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, ZIP_openRead_failed); else if (zlib_err(inflateInit2(&finfo->stream, -MAX_WBITS)) != Z_OK) goto ZIP_openRead_failed; } /* if */ memcpy(retval, &ZIP_Io, sizeof (PHYSFS_Io)); retval->opaque = finfo; return retval; ZIP_openRead_failed: if (finfo != NULL) { if (finfo->io != NULL) finfo->io->destroy(finfo->io); if (finfo->buffer != NULL) { allocator.Free(finfo->buffer); inflateEnd(&finfo->stream); } /* if */ allocator.Free(finfo); } /* if */ if (retval != NULL) allocator.Free(retval); return NULL; } /* ZIP_openRead */ static PHYSFS_Io *ZIP_openWrite(void *opaque, const char *filename) { BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL); } /* ZIP_openWrite */ static PHYSFS_Io *ZIP_openAppend(void *opaque, const char *filename) { BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL); } /* ZIP_openAppend */ static void ZIP_closeArchive(void *opaque) { ZIPinfo *zi = (ZIPinfo *) (opaque); zi->io->destroy(zi->io); zip_free_entries(zi->entries, zi->entryCount); allocator.Free(zi); } /* ZIP_closeArchive */ static int ZIP_remove(void *opaque, const char *name) { BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0); } /* ZIP_remove */ static int ZIP_mkdir(void *opaque, const char *name) { BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0); } /* ZIP_mkdir */ static int ZIP_stat(void *opaque, const char *filename, PHYSFS_Stat *stat) { int isDir = 0; const ZIPinfo *info = (const ZIPinfo *) opaque; const ZIPentry *entry = zip_find_entry(info, filename, &isDir); /* !!! FIXME: does this need to resolve entries here? */ if ((!isDir) && (entry == NULL)) return 0; else if (isDir) { stat->filesize = 0; stat->filetype = PHYSFS_FILETYPE_DIRECTORY; } /* if */ else if (zip_entry_is_symlink(entry)) { stat->filesize = 0; stat->filetype = PHYSFS_FILETYPE_SYMLINK; } /* else if */ else { stat->filesize = (PHYSFS_sint64) entry->uncompressed_size; stat->filetype = PHYSFS_FILETYPE_REGULAR; } /* else */ stat->modtime = ((entry) ? entry->last_mod_time : 0); stat->createtime = stat->modtime; stat->accesstime = 0; stat->readonly = 1; /* .zip files are always read only */ return 1; } /* ZIP_stat */ const PHYSFS_Archiver __PHYSFS_Archiver_ZIP = { CURRENT_PHYSFS_ARCHIVER_API_VERSION, { "ZIP", "PkZip/WinZip/Info-Zip compatible", "Ryan C. Gordon ", "http://icculus.org/physfs/", 1, /* supportsSymlinks */ }, ZIP_openArchive, ZIP_enumerateFiles, ZIP_openRead, ZIP_openWrite, ZIP_openAppend, ZIP_remove, ZIP_mkdir, ZIP_stat, ZIP_closeArchive }; #endif /* defined PHYSFS_SUPPORTS_ZIP */ /* end of archiver_zip.c ... */