--- a/misc/physfs/src/archiver_zip.c Wed Feb 20 02:21:58 2013 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1717 +0,0 @@
-/*
- * 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 <errno.h>
-#include <time.h>
-
-#define USE_MINIZ 1
-#if USE_MINIZ
-#include "physfs_miniz.h"
-#else
-#include <zlib.h>
-#endif
-
-/*
- * 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_setError(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, 0);
-
- /*
- * 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_NO_SUCH_PATH, 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(PHYSFS_Dir *opaque, const char *dname,
- int omitSymLinks, 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. */
-
- if ((omitSymLinks) && (zip_entry_is_symlink(&info->entries[i])))
- i++;
- 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(PHYSFS_Dir *opaque, const char *fnm,
- int *fileExists)
-{
- PHYSFS_Io *retval = NULL;
- ZIPinfo *info = (ZIPinfo *) opaque;
- ZIPentry *entry = zip_find_entry(info, fnm, NULL);
- ZIPfileinfo *finfo = NULL;
-
- *fileExists = (entry != 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(PHYSFS_Dir *opaque, const char *filename)
-{
- BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
-} /* ZIP_openWrite */
-
-
-static PHYSFS_Io *ZIP_openAppend(PHYSFS_Dir *opaque, const char *filename)
-{
- BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
-} /* ZIP_openAppend */
-
-
-static void ZIP_closeArchive(PHYSFS_Dir *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(PHYSFS_Dir *opaque, const char *name)
-{
- BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
-} /* ZIP_remove */
-
-
-static int ZIP_mkdir(PHYSFS_Dir *opaque, const char *name)
-{
- BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
-} /* ZIP_mkdir */
-
-
-static int ZIP_stat(PHYSFS_Dir *opaque, const char *filename, int *exists,
- 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? */
-
- *exists = isDir || (entry != 0);
- if (!*exists)
- return 0;
-
- 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 =
-{
- {
- "ZIP",
- "PkZip/WinZip/Info-Zip compatible",
- "Ryan C. Gordon <icculus@icculus.org>",
- "http://icculus.org/physfs/",
- },
- ZIP_openArchive, /* openArchive() method */
- ZIP_enumerateFiles, /* enumerateFiles() method */
- ZIP_openRead, /* openRead() method */
- ZIP_openWrite, /* openWrite() method */
- ZIP_openAppend, /* openAppend() method */
- ZIP_remove, /* remove() method */
- ZIP_mkdir, /* mkdir() method */
- ZIP_closeArchive, /* closeArchive() method */
- ZIP_stat /* stat() method */
-};
-
-#endif /* defined PHYSFS_SUPPORTS_ZIP */
-
-/* end of zip.c ... */
-