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MegaGlest/mk/linux/mojosetup/archive_zip.c

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/**
* MojoSetup; a portable, flexible installation application.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
#include "fileio.h"
#if !SUPPORT_ZIP
MojoArchive *MojoArchive_createZIP(MojoInput *io) { return NULL; }
#else
#include <time.h>
#include <errno.h>
#include "miniz.h"
/*
* ZIP support routines, adapted from PhysicsFS (http://icculus.org/physfs/)
*/
#if __MOJOSETUP__
// Glue from PhysicsFS to MojoSetup follows...
typedef int8 PHYSFS_sint8;
typedef uint8 PHYSFS_uint8;
typedef int16 PHYSFS_sint16;
typedef uint16 PHYSFS_uint16;
typedef int32 PHYSFS_sint32;
typedef uint32 PHYSFS_uint32;
typedef int64 PHYSFS_sint64;
typedef uint64 PHYSFS_uint64;
#define ERRPASS NULL
#define BAIL_IF_MACRO(cond, err, ret) do { if (cond) return ret; } while (0)
#define BAIL_MACRO(err, ret) return ret
#define GOTO_IF_MACRO(cond, err, jmp) do { if (cond) goto jmp; } while (0)
static void *mallocWrap(PHYSFS_uint64 s) { return xmalloc((uint32) s); }
static void *reallocWrap(void *p,PHYSFS_uint64 s){return xrealloc(p,(uint32)s);}
static void freeWrap(void *p) { free(p); }
typedef struct
{
int (*Init)(void); /**< Initialize. Can be NULL. Zero on failure. */
void (*Deinit)(void); /**< Deinitialize your allocator. Can be NULL. */
void *(*Malloc)(PHYSFS_uint64); /**< Allocate like malloc(). */
void *(*Realloc)(void *, PHYSFS_uint64); /**< Reallocate like realloc(). */
void (*Free)(void *); /**< Free memory from Malloc or Realloc. */
} PHYSFS_Allocator;
static PHYSFS_Allocator allocator = { 0, 0, mallocWrap, reallocWrap, freeWrap };
#define ERR_ZLIB_NEED_DICT _("need dictionary")
#define ERR_ZLIB_DATA_ERROR _("data error")
#define ERR_ZLIB_MEMORY_ERROR _("memory error")
#define ERR_ZLIB_BUFFER_ERROR _("buffer error")
#define ERR_ZLIB_VERSION_ERROR _("version error")
#define ERR_ZLIB_UNKNOWN_ERROR _("unknown error")
#define __PHYSFS_setError(x)
#define fvoid void
#define dvoid void
#define readui16(io, ptr) MojoInput_readui16((MojoInput *) (io), ptr)
#define readui32(io, ptr) MojoInput_readui32((MojoInput *) (io), ptr)
#define readui64(io, ptr) MojoInput_readui64((MojoInput *) (io), ptr)
static PHYSFS_sint64 __PHYSFS_platformRead(void *opaque, void *buffer,
PHYSFS_uint32 size, PHYSFS_uint32 count)
{
MojoInput *io = (MojoInput *) opaque;
int64 rc = io->read(io, buffer, size * count);
return rc / size; // !!! FIXME: what if rc == -1?
}
static int __PHYSFS_readAll(void *opaque, void *buf, const PHYSFS_sint64 len)
{
return (__PHYSFS_platformRead(opaque, buf, 1, (PHYSFS_uint32) len) == len);
}
static int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
{
MojoInput *io = (MojoInput *) opaque;
return io->seek(io, pos) ? 1 : 0;
}
static int __PHYSFS_platformClose(void *opaque)
{
MojoInput *io = (MojoInput *) opaque;
io->close(io);
return 1;
}
static PHYSFS_sint64 __PHYSFS_platformFileLength(void *opaque)
{
MojoInput *io = (MojoInput *) opaque;
return io->length(io);
}
static PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
{
MojoInput *io = (MojoInput *) opaque;
return io->tell(io);
}
#define PHYSFS_QUICKSORT_THRESHOLD 4
static void __PHYSFS_bubble_sort(void *a, size_t lo, size_t hi,
int (*cmpfn)(void *, size_t, size_t),
void (*swapfn)(void *, size_t, size_t))
{
size_t i;
int sorted;
do
{
sorted = 1;
for (i = lo; i < hi; i++)
{
if (cmpfn(a, i, i + 1) > 0)
{
swapfn(a, i, i + 1);
sorted = 0;
} /* if */
} /* for */
} while (!sorted);
} /* __PHYSFS_bubble_sort */
static void __PHYSFS_quick_sort(void *a, size_t lo, size_t hi,
int (*cmpfn)(void *, size_t, size_t),
void (*swapfn)(void *, size_t, size_t))
{
size_t i;
size_t j;
size_t v;
if ((hi - lo) <= PHYSFS_QUICKSORT_THRESHOLD)
__PHYSFS_bubble_sort(a, lo, hi, cmpfn, swapfn);
else
{
i = (hi + lo) / 2;
if (cmpfn(a, lo, i) > 0) swapfn(a, lo, i);
if (cmpfn(a, lo, hi) > 0) swapfn(a, lo, hi);
if (cmpfn(a, i, hi) > 0) swapfn(a, i, hi);
j = hi - 1;
swapfn(a, i, j);
i = lo;
v = j;
while (1)
{
while(cmpfn(a, ++i, v) < 0) { /* do nothing */ }
while(cmpfn(a, --j, v) > 0) { /* do nothing */ }
if (j < i)
break;
swapfn(a, i, j);
} /* while */
swapfn(a, i, hi-1);
__PHYSFS_quick_sort(a, lo, j, cmpfn, swapfn);
__PHYSFS_quick_sort(a, i+1, hi, cmpfn, swapfn);
} /* else */
} /* __PHYSFS_quick_sort */
void __PHYSFS_sort(void *entries, size_t max,
int (*cmpfn)(void *, size_t, size_t),
void (*swapfn)(void *, size_t, size_t))
{
/*
* Quicksort w/ Bubblesort fallback algorithm inspired by code from here:
* http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html
*/
if (max > 0)
__PHYSFS_quick_sort(entries, 0, max - 1, cmpfn, swapfn);
} /* __PHYSFS_sort */
typedef void (*PHYSFS_EnumFilesCallback)(void *, const char *, const char *);
#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.
*/
#if __MOJOSETUP__
#define ZIP_READBUFSIZE (128 * 1024)
#else
#define ZIP_READBUFSIZE (16 * 1024)
#endif
/*
* 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 */
#if __MOJOSETUP__
PHYSFS_uint16 perms;
char *linkdest;
#endif
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
{
char *archiveName; /* path to ZIP in platform-dependent notation. */
#if __MOJOSETUP__
void *io; /* a MojoInput pointer */
int32 enumIndex; /* index of last entry enumerated. */
int64 offset; /* byte offset from start of MojoInput where zip starts. */
#endif
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
{
#if __MOJOSETUP__
ZIPinfo *archive; /* archive this belongs to, for duplication. */
#endif
ZIPentry *entry; /* Info on file. */
void *handle; /* 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 const char *zlib_error_string(int rc)
{
switch (rc)
{
case Z_OK: return(NULL); /* not an error. */
case Z_STREAM_END: return(NULL); /* not an error. */
#ifndef _WIN32_WCE
case Z_ERRNO: return(strerror(errno));
#endif
case Z_NEED_DICT: return(ERR_ZLIB_NEED_DICT);
case Z_DATA_ERROR: return(ERR_ZLIB_DATA_ERROR);
case Z_MEM_ERROR: return(ERR_ZLIB_MEMORY_ERROR);
case Z_BUF_ERROR: return(ERR_ZLIB_BUFFER_ERROR);
case Z_VERSION_ERROR: return(ERR_ZLIB_VERSION_ERROR);
default: return(ERR_ZLIB_UNKNOWN_ERROR);
} /* switch */
} /* zlib_error_string */
/*
* Wrap all zlib calls in this, so the physfs error state is set appropriately.
*/
static int zlib_err(int rc)
{
const char *str = zlib_error_string(rc);
if (str != NULL)
__PHYSFS_setError(str);
return(rc);
} /* zlib_err */
#if !__MOJOSETUP__ /* we have our own readuiXX() functions. */
/*
* Read an unsigned 64-bit int and swap to native byte order.
*/
static int readui64(void *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(void *in, PHYSFS_uint32 *val)
{
PHYSFS_uint32 v;
BAIL_IF_MACRO(__PHYSFS_platformRead(in, &v, sizeof (v), 1) != 1, NULL, 0);
*val = PHYSFS_swapULE32(v);
return(1);
} /* readui32 */
/*
* Read an unsigned 16-bit int and swap to native byte order.
*/
static int readui16(void *in, PHYSFS_uint16 *val)
{
PHYSFS_uint16 v;
BAIL_IF_MACRO(__PHYSFS_platformRead(in, &v, sizeof (v), 1) != 1, NULL, 0);
*val = PHYSFS_swapULE16(v);
return(1);
} /* readui16 */
#endif
static PHYSFS_sint64 ZIP_read(fvoid *opaque, void *buf,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
{
ZIPfileinfo *finfo = (ZIPfileinfo *) opaque;
ZIPentry *entry = finfo->entry;
PHYSFS_sint64 retval = 0;
PHYSFS_sint64 maxread = ((PHYSFS_sint64) objSize) * objCount;
PHYSFS_sint64 avail = entry->uncompressed_size -
finfo->uncompressed_position;
BAIL_IF_MACRO(maxread == 0, NULL, 0); /* quick rejection. */
if (avail < maxread)
{
maxread = avail - (avail % objSize);
objCount = (PHYSFS_uint32) (maxread / objSize);
BAIL_IF_MACRO(objCount == 0, ERR_PAST_EOF, 0); /* quick rejection. */
__PHYSFS_setError(ERR_PAST_EOF); /* this is always true here. */
} /* if */
if (entry->compression_method == COMPMETH_NONE)
{
retval = __PHYSFS_platformRead(finfo->handle, buf, objSize, objCount);
} /* if */
else
{
finfo->stream.next_out = buf;
finfo->stream.avail_out = objSize * objCount;
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 = __PHYSFS_platformRead(finfo->handle,
finfo->buffer,
1, (PHYSFS_uint32) 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 */
retval /= objSize;
} /* else */
if (retval > 0)
finfo->uncompressed_position += (PHYSFS_uint32) (retval * objSize);
return(retval);
} /* ZIP_read */
#if !__MOJOSETUP__
static PHYSFS_sint64 ZIP_write(fvoid *opaque, const void *buf,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
{
BAIL_MACRO(ERR_NOT_SUPPORTED, -1);
} /* ZIP_write */
static int ZIP_eof(fvoid *opaque)
{
ZIPfileinfo *finfo = (ZIPfileinfo *) opaque;
return(finfo->uncompressed_position >= finfo->entry->uncompressed_size);
} /* ZIP_eof */
#endif
static PHYSFS_sint64 ZIP_tell(fvoid *opaque)
{
return(((ZIPfileinfo *) opaque)->uncompressed_position);
} /* ZIP_tell */
static int ZIP_seek(fvoid *opaque, PHYSFS_uint64 offset)
{
ZIPfileinfo *finfo = (ZIPfileinfo *) opaque;
ZIPentry *entry = finfo->entry;
void *in = finfo->handle;
BAIL_IF_MACRO(offset > entry->uncompressed_size, ERR_PAST_EOF, 0);
if (entry->compression_method == COMPMETH_NONE)
{
PHYSFS_sint64 newpos = offset + entry->offset;
BAIL_IF_MACRO(!__PHYSFS_platformSeek(in, newpos), NULL, 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 (!__PHYSFS_platformSeek(in, 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(opaque, buf, maxread, 1) != 1)
return(0);
} /* while */
} /* else */
return(1);
} /* ZIP_seek */
static PHYSFS_sint64 ZIP_fileLength(fvoid *opaque)
{
ZIPfileinfo *finfo = (ZIPfileinfo *) opaque;
return (PHYSFS_sint64) finfo->entry->uncompressed_size;
} /* ZIP_fileLength */
static int ZIP_fileClose(fvoid *opaque)
{
ZIPfileinfo *finfo = (ZIPfileinfo *) opaque;
BAIL_IF_MACRO(!__PHYSFS_platformClose(finfo->handle), NULL, 0);
if (finfo->entry->compression_method != COMPMETH_NONE)
inflateEnd(&finfo->stream);
if (finfo->buffer != NULL)
allocator.Free(finfo->buffer);
allocator.Free(finfo);
return(1);
} /* ZIP_fileClose */
static PHYSFS_sint64 zip_find_end_of_central_dir(void *in, 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 = __PHYSFS_platformFileLength(in);
BAIL_IF_MACRO(filelen == -1, NULL, 0); /* !!! FIXME: unlocalized string */
/*
* 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(!__PHYSFS_platformSeek(in, filepos), NULL, -1);
/* make sure we catch a signature between buffers. */
if (totalread != 0)
{
if (__PHYSFS_platformRead(in, buf, maxread - 4, 1) != 1)
return(-1);
memcpy(&buf[maxread - 4], &extra, sizeof (extra));
totalread += maxread - 4;
} /* if */
else
{
if (__PHYSFS_platformRead(in, buf, maxread, 1) != 1)
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, ERR_NOT_AN_ARCHIVE, -1);
if (len != NULL)
*len = filelen;
return(filepos + i);
} /* zip_find_end_of_central_dir */
#if !__MOJOSETUP__
static int ZIP_isArchive(const char *filename, int forWriting)
{
PHYSFS_uint32 sig;
int retval = 0;
void *in;
in = __PHYSFS_platformOpenRead(filename);
BAIL_IF_MACRO(in == NULL, NULL, 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(in, &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(in, NULL) != -1);
} /* if */
} /* if */
__PHYSFS_platformClose(in);
return(retval);
} /* ZIP_isArchive */
#endif
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);
#if __MOJOSETUP__
if (entry->linkdest != NULL)
allocator.Free(entry->linkdest);
#endif
} /* 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(ZIPinfo *info, const char *path, int *isDir)
{
ZIPentry *a = info->entries;
PHYSFS_sint32 pathlen = 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]);
else
hi = middle - 1; /* adjust search params, try again. */
} /* if */
} /* while */
if (isDir != NULL)
*isDir = 0;
BAIL_MACRO(ERR_NO_SUCH_FILE, 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(void *in, 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. (path) is always free()'d by this
* function.
*/
static ZIPentry *zip_follow_symlink(void *in, ZIPinfo *info, char *path)
{
ZIPentry *entry;
zip_expand_symlink_path(path);
entry = zip_find_entry(info, path, NULL);
if (entry != NULL)
{
if (!zip_resolve(in, info, entry)) /* recursive! */
entry = NULL;
else
{
if (entry->symlink != NULL)
entry = entry->symlink;
} /* else */
} /* if */
allocator.Free(path);
return(entry);
} /* zip_follow_symlink */
static int zip_resolve_symlink(void *in, ZIPinfo *info, ZIPentry *entry)
{
char *path;
const PHYSFS_uint64 size = entry->uncompressed_size;
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(!__PHYSFS_platformSeek(in, entry->offset), NULL, 0);
path = (char *) allocator.Malloc(size + 1);
BAIL_IF_MACRO(path == NULL, ERR_OUT_OF_MEMORY, 0);
if (entry->compression_method == COMPMETH_NONE)
rc = (__PHYSFS_platformRead(in, path, size, 1) == 1);
else /* symlink target path is compressed... */
{
z_stream stream;
const PHYSFS_uint64 compsize = entry->compressed_size;
PHYSFS_uint8 *compressed = (PHYSFS_uint8 *) allocator.Malloc(compsize);
if (compressed != NULL)
{
if (__PHYSFS_platformRead(in, compressed, compsize, 1) == 1)
{
initializeZStream(&stream);
stream.next_in = compressed;
stream.avail_in = compsize;
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 */
allocator.Free(compressed);
} /* if */
} /* else */
if (!rc)
allocator.Free(path);
else
{
path[entry->uncompressed_size] = '\0'; /* null-terminate it. */
zip_convert_dos_path(entry, path);
#if __MOJOSETUP__
entry->linkdest = xstrdup(path);
#endif
entry->symlink = zip_follow_symlink(in, info, path);
} /* else */
return(entry->symlink != NULL);
} /* zip_resolve_symlink */
/*
* Parse the local file header of an entry, and update entry->offset.
*/
static int zip_parse_local(void *in, 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(!__PHYSFS_platformSeek(in, entry->offset), NULL, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 != ZIP_LOCAL_FILE_SIG, ERR_CORRUPTED, 0);
BAIL_IF_MACRO(!readui16(in, &ui16), NULL, 0);
BAIL_IF_MACRO(ui16 != entry->version_needed, ERR_CORRUPTED, 0);
BAIL_IF_MACRO(!readui16(in, &ui16), NULL, 0); /* general bits. */
BAIL_IF_MACRO(!readui16(in, &ui16), NULL, 0);
BAIL_IF_MACRO(ui16 != entry->compression_method, ERR_CORRUPTED, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0); /* date/time */
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 && (ui32 != entry->crc), ERR_CORRUPTED, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 && (ui32 != 0xFFFFFFFF) &&
(ui32 != entry->compressed_size), PHYSFS_ERR_CORRUPT, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 && (ui32 != 0xFFFFFFFF) &&
(ui32 != entry->uncompressed_size), PHYSFS_ERR_CORRUPT, 0);
BAIL_IF_MACRO(!readui16(in, &fnamelen), NULL, 0);
BAIL_IF_MACRO(!readui16(in, &extralen), NULL, 0);
entry->offset += fnamelen + extralen + 30;
return(1);
} /* zip_parse_local */
static int zip_resolve(void *in, 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, ERR_CORRUPTED, 0);
BAIL_IF_MACRO(resolve_type == ZIP_BROKEN_SYMLINK, ERR_CORRUPTED, 0);
/* uhoh...infinite symlink loop! */
BAIL_IF_MACRO(resolve_type == ZIP_RESOLVING, 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(in, 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(in, 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)
{
#ifdef _WIN32_WCE
/* We have no struct tm and no mktime right now.
FIXME: This should probably be fixed at some point.
*/
return -1;
#else
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));
#endif
} /* zip_dos_time_to_physfs_time */
static int zip_load_entry(void *in, 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(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 != ZIP_CENTRAL_DIR_SIG, ERR_CORRUPTED, 0);
/* Get the pertinent parts of the record... */
BAIL_IF_MACRO(!readui16(in, &entry->version), NULL, 0);
BAIL_IF_MACRO(!readui16(in, &entry->version_needed), NULL, 0);
BAIL_IF_MACRO(!readui16(in, &ui16), NULL, 0); /* general bits */
BAIL_IF_MACRO(!readui16(in, &entry->compression_method), NULL, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
entry->last_mod_time = zip_dos_time_to_physfs_time(ui32);
BAIL_IF_MACRO(!readui32(in, &entry->crc), NULL, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), ERRPASS, 0);
entry->compressed_size = (PHYSFS_uint64) ui32;
BAIL_IF_MACRO(!readui32(in, &ui32), ERRPASS, 0);
entry->uncompressed_size = (PHYSFS_uint64) ui32;
BAIL_IF_MACRO(!readui16(in, &fnamelen), NULL, 0);
BAIL_IF_MACRO(!readui16(in, &extralen), NULL, 0);
BAIL_IF_MACRO(!readui16(in, &commentlen), NULL, 0);
BAIL_IF_MACRO(!readui16(in, &ui16), ERRPASS, 0);
starting_disk = (PHYSFS_uint32) ui16;
BAIL_IF_MACRO(!readui16(in, &ui16), NULL, 0); /* internal file attribs */
BAIL_IF_MACRO(!readui32(in, &external_attr), NULL, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), ERRPASS, 0);
offset = (PHYSFS_uint64) ui32;
#if __MOJOSETUP__
entry->perms = (external_attr >> 16) & 0xFFFF;
entry->linkdest = NULL;
#endif
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, ERR_OUT_OF_MEMORY, 0);
if (__PHYSFS_platformRead(in, entry->name, fnamelen, 1) != 1)
goto zip_load_entry_puked;
entry->name[fnamelen] = '\0'; /* null-terminate the filename. */
zip_convert_dos_path(entry, entry->name);
si64 = __PHYSFS_platformTell(in);
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(in, &sig))
goto zip_load_entry_puked;
else if (!readui16(in, &len))
goto zip_load_entry_puked;
si64 += 4 + len;
extralen -= 4 + len;
if (sig != ZIP64_EXTENDED_INFO_EXTRA_FIELD_SIG)
{
if (!__PHYSFS_platformSeek(in, 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(in, &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(in, &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(in, &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(in, &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 (!__PHYSFS_platformSeek(in, 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(void *in, 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(!__PHYSFS_platformSeek(in, central_ofs), NULL, 0);
info->entries = (ZIPentry *) allocator.Malloc(sizeof (ZIPentry) * max);
BAIL_IF_MACRO(info->entries == NULL, ERR_OUT_OF_MEMORY, 0);
for (i = 0; i < max; i++)
{
if (!zip_load_entry(in, 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(void *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(!__PHYSFS_platformSeek(io, offset), NULL, 0);
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(!__PHYSFS_platformSeek(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(!__PHYSFS_platformSeek(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_uint32 i;
if (len > sizeof (buf))
len = sizeof (buf);
BAIL_IF_MACRO(!__PHYSFS_platformSeek(io, pos - len), ERRPASS, -1);
BAIL_IF_MACRO(!__PHYSFS_readAll(io, buf, len), ERRPASS, -1);
for (i = 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(void *io, ZIPinfo *info,
PHYSFS_uint64 *data_start,
PHYSFS_uint64 *dir_ofs,
PHYSFS_sint64 pos)
{
PHYSFS_uint64 ui64;
PHYSFS_uint32 ui32;
PHYSFS_uint16 ui16;
//PHYSFS_sint64 len;
/* We should be positioned right past the locator signature. */
if ((pos < 0) || (!__PHYSFS_platformSeek(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(!__PHYSFS_platformSeek(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(void *in, 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 = 0;
PHYSFS_sint64 pos;
int rc;
/* find the end-of-central-dir record, and seek to it. */
pos = zip_find_end_of_central_dir(in, &len);
BAIL_IF_MACRO(pos == -1, NULL, 0);
BAIL_IF_MACRO(!__PHYSFS_platformSeek(in, pos), NULL, 0);
/* check signature again, just in case. */
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 != ZIP_END_OF_CENTRAL_DIR_SIG, ERR_NOT_AN_ARCHIVE, 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(in, 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(!__PHYSFS_platformSeek(in, pos + 4), ERRPASS, 0);
/* number of this disk */
BAIL_IF_MACRO(!readui16(in, &ui16), NULL, 0);
BAIL_IF_MACRO(ui16 != 0, ERR_UNSUPPORTED_ARCHIVE, 0);
/* number of the disk with the start of the central directory */
BAIL_IF_MACRO(!readui16(in, &ui16), NULL, 0);
BAIL_IF_MACRO(ui16 != 0, ERR_UNSUPPORTED_ARCHIVE, 0);
/* total number of entries in the central dir on this disk */
BAIL_IF_MACRO(!readui16(in, &ui16), NULL, 0);
/* total number of entries in the central dir */
BAIL_IF_MACRO(!readui16(in, &entryCount16), ERRPASS, 0);
BAIL_IF_MACRO(ui16 != entryCount16, PHYSFS_ERR_CORRUPT, 0);
info->entryCount = entryCount16;
/* size of the central directory */
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
/* offset of central directory */
BAIL_IF_MACRO(!readui32(in, &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(in, &ui16), NULL, 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, ERR_UNSUPPORTED_ARCHIVE, 0);
return(1); /* made it. */
} /* zip_parse_end_of_central_dir */
#if __MOJOSETUP__
static ZIPinfo *zip_create_zipinfo(void *in, const char *name)
#else
static ZIPinfo *zip_create_zipinfo(const char *name)
#endif
{
char *ptr;
ZIPinfo *info = (ZIPinfo *) allocator.Malloc(sizeof (ZIPinfo));
BAIL_IF_MACRO(info == NULL, ERR_OUT_OF_MEMORY, 0);
memset(info, '\0', sizeof (ZIPinfo));
ptr = (char *) allocator.Malloc(strlen(name) + 1);
if (ptr == NULL)
{
allocator.Free(info);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
info->archiveName = ptr;
strcpy(info->archiveName, name);
#if __MOJOSETUP__
info->io = in;
info->enumIndex = -1;
#endif
return(info);
} /* zip_create_zipinfo */
#if __MOJOSETUP__
static void *ZIP_openArchive(void *in, const char *name, int forWriting)
#else
static void *ZIP_openArchive(const char *name, int forWriting)
#endif
{
#if !__MOJOSETUP__
void *in = NULL;
#endif
ZIPinfo *info = NULL;
PHYSFS_uint64 data_start;
PHYSFS_uint64 cent_dir_ofs;
BAIL_IF_MACRO(forWriting, ERR_ARC_IS_READ_ONLY, NULL);
#if __MOJOSETUP__
if ((info = zip_create_zipinfo(in, name)) == NULL)
goto zip_openarchive_failed;
#else
if ((in = __PHYSFS_platformOpenRead(name)) == NULL)
goto zip_openarchive_failed;
if ((info = zip_create_zipinfo(name)) == NULL)
goto zip_openarchive_failed;
#endif
if (!zip_parse_end_of_central_dir(in, info, &data_start, &cent_dir_ofs))
goto zip_openarchive_failed;
#if __MOJOSETUP__
info->offset = (int64) data_start;
#endif
if (!zip_load_entries(in, info, data_start, cent_dir_ofs))
goto zip_openarchive_failed;
#if !__MOJOSETUP__
__PHYSFS_platformClose(in);
#endif
return(info);
zip_openarchive_failed:
if (info != NULL)
{
if (info->archiveName != NULL)
allocator.Free(info->archiveName);
allocator.Free(info);
} /* if */
#if !__MOJOSETUP__
if (in != NULL)
__PHYSFS_platformClose(in);
#endif
return(NULL);
} /* ZIP_openArchive */
#if !__MOJOSETUP__
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_sint32) (info->entryCount - 1);
PHYSFS_sint64 middle;
PHYSFS_uint32 dlen = 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 = alloca(ln + 1);
if (newstr == NULL)
return;
memcpy(newstr, str, ln);
newstr[ln] = '\0';
cb(callbackdata, odir, newstr);
} /* doEnumCallback */
static void ZIP_enumerateFiles(dvoid *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 max, i;
i = zip_find_start_of_dir(info, dname, 0);
if (i == -1) /* no such directory. */
return;
dlen = 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 int ZIP_exists(dvoid *opaque, const char *name)
{
int isDir;
ZIPinfo *info = (ZIPinfo *) opaque;
ZIPentry *entry = zip_find_entry(info, name, &isDir);
return((entry != NULL) || (isDir));
} /* ZIP_exists */
static PHYSFS_sint64 ZIP_getLastModTime(dvoid *opaque,
const char *name,
int *fileExists)
{
int isDir;
ZIPinfo *info = (ZIPinfo *) opaque;
ZIPentry *entry = zip_find_entry(info, name, &isDir);
*fileExists = ((isDir) || (entry != NULL));
if (isDir)
return(1); /* Best I can do for a dir... */
BAIL_IF_MACRO(entry == NULL, NULL, -1);
return(entry->last_mod_time);
} /* ZIP_getLastModTime */
static int ZIP_isDirectory(dvoid *opaque, const char *name, int *fileExists)
{
ZIPinfo *info = (ZIPinfo *) opaque;
int isDir;
ZIPentry *entry = zip_find_entry(info, name, &isDir);
*fileExists = ((isDir) || (entry != NULL));
if (isDir)
return(1); /* definitely a dir. */
/* Follow symlinks. This means we might need to resolve entries. */
BAIL_IF_MACRO(entry == NULL, ERR_NO_SUCH_FILE, 0);
if (entry->resolved == ZIP_UNRESOLVED_SYMLINK) /* gotta resolve it. */
{
int rc;
#if __MOJOSETUP__
rc = zip_resolve(info->io, info, entry);
#else
void *in = __PHYSFS_platformOpenRead(info->archiveName);
BAIL_IF_MACRO(in == NULL, NULL, 0);
rc = zip_resolve(in, info, entry);
__PHYSFS_platformClose(in);
#endif
if (!rc)
return(0);
} /* if */
BAIL_IF_MACRO(entry->resolved == ZIP_BROKEN_SYMLINK, NULL, 0);
BAIL_IF_MACRO(entry->symlink == NULL, ERR_NOT_A_DIR, 0);
return(zip_find_start_of_dir(info, entry->symlink->name, 1) >= 0);
} /* ZIP_isDirectory */
static int ZIP_isSymLink(dvoid *opaque, const char *name, int *fileExists)
{
int isDir;
ZIPentry *entry = zip_find_entry((ZIPinfo *) opaque, name, &isDir);
*fileExists = ((isDir) || (entry != NULL));
BAIL_IF_MACRO(entry == NULL, NULL, 0);
return(zip_entry_is_symlink(entry));
} /* ZIP_isSymLink */
#endif
static void *zip_get_file_handle(const char *fn, ZIPinfo *inf, ZIPentry *entry)
{
int success;
#if __MOJOSETUP__
MojoInput *io = (MojoInput *) inf->io;
void *retval = io->duplicate(io);
#else
void *retval = __PHYSFS_platformOpenRead(fn);
#endif
BAIL_IF_MACRO(retval == NULL, NULL, NULL);
success = zip_resolve(retval, inf, entry);
if (success)
{
PHYSFS_sint64 offset;
offset = ((entry->symlink) ? entry->symlink->offset : entry->offset);
success = __PHYSFS_platformSeek(retval, offset);
} /* if */
if (!success)
{
__PHYSFS_platformClose(retval);
retval = NULL;
} /* if */
return(retval);
} /* zip_get_file_handle */
static fvoid *ZIP_openRead(dvoid *opaque, const char *fnm, int *fileExists)
{
ZIPinfo *info = (ZIPinfo *) opaque;
ZIPentry *entry = zip_find_entry(info, fnm, NULL);
ZIPfileinfo *finfo = NULL;
void *in;
*fileExists = (entry != NULL);
BAIL_IF_MACRO(entry == NULL, NULL, NULL);
in = zip_get_file_handle(info->archiveName, info, entry);
BAIL_IF_MACRO(in == NULL, NULL, NULL);
finfo = (ZIPfileinfo *) allocator.Malloc(sizeof (ZIPfileinfo));
if (finfo == NULL)
{
__PHYSFS_platformClose(in);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
memset(finfo, '\0', sizeof (ZIPfileinfo));
finfo->handle = in;
finfo->entry = ((entry->symlink != NULL) ? entry->symlink : entry);
initializeZStream(&finfo->stream);
if (finfo->entry->compression_method != COMPMETH_NONE)
{
if (zlib_err(inflateInit2(&finfo->stream, -MAX_WBITS)) != Z_OK)
{
ZIP_fileClose(finfo);
return(NULL);
} /* if */
finfo->buffer = (PHYSFS_uint8 *) allocator.Malloc(ZIP_READBUFSIZE);
if (finfo->buffer == NULL)
{
ZIP_fileClose(finfo);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
} /* if */
#if __MOJOSETUP__
finfo->archive = info;
#endif
return(finfo);
} /* ZIP_openRead */
#if !__MOJOSETUP__
static fvoid *ZIP_openWrite(dvoid *opaque, const char *filename)
{
BAIL_MACRO(ERR_NOT_SUPPORTED, NULL);
} /* ZIP_openWrite */
static fvoid *ZIP_openAppend(dvoid *opaque, const char *filename)
{
BAIL_MACRO(ERR_NOT_SUPPORTED, NULL);
} /* ZIP_openAppend */
#endif
static void ZIP_dirClose(dvoid *opaque)
{
ZIPinfo *zi = (ZIPinfo *) (opaque);
zip_free_entries(zi->entries, zi->entryCount);
allocator.Free(zi->archiveName);
allocator.Free(zi);
} /* ZIP_dirClose */
#if !__MOJOSETUP__
static int ZIP_remove(dvoid *opaque, const char *name)
{
BAIL_MACRO(ERR_NOT_SUPPORTED, 0);
} /* ZIP_remove */
static int ZIP_mkdir(dvoid *opaque, const char *name)
{
BAIL_MACRO(ERR_NOT_SUPPORTED, 0);
} /* ZIP_mkdir */
const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP =
{
"ZIP",
ZIP_ARCHIVE_DESCRIPTION,
"Ryan C. Gordon <icculus@icculus.org>",
"http://icculus.org/physfs/",
};
const PHYSFS_Archiver __PHYSFS_Archiver_ZIP =
{
&__PHYSFS_ArchiveInfo_ZIP,
ZIP_isArchive, /* isArchive() method */
ZIP_openArchive, /* openArchive() method */
ZIP_enumerateFiles, /* enumerateFiles() method */
ZIP_exists, /* exists() method */
ZIP_isDirectory, /* isDirectory() method */
ZIP_isSymLink, /* isSymLink() method */
ZIP_getLastModTime, /* getLastModTime() method */
ZIP_openRead, /* openRead() method */
ZIP_openWrite, /* openWrite() method */
ZIP_openAppend, /* openAppend() method */
ZIP_remove, /* remove() method */
ZIP_mkdir, /* mkdir() method */
ZIP_dirClose, /* dirClose() method */
ZIP_read, /* read() method */
ZIP_write, /* write() method */
ZIP_eof, /* eof() method */
ZIP_tell, /* tell() method */
ZIP_seek, /* seek() method */
ZIP_fileLength, /* fileLength() method */
ZIP_fileClose /* fileClose() method */
};
#else // Glue from MojoSetup to PhysicsFS follows...
// MojoInput implementation...
static boolean MojoInput_zip_ready(MojoInput *io)
{
return true; // !!! FIXME: ready if there are bytes uncompressed.
} // MojoInput_zip_ready
static int64 MojoInput_zip_read(MojoInput *io, void *buf, uint32 bufsize)
{
return ZIP_read(io->opaque, buf, 1, bufsize);
} // MojoInput_zip_read
static boolean MojoInput_zip_seek(MojoInput *io, uint64 pos)
{
return ((ZIP_seek(io->opaque, pos)) ? true : false);
} // MojoInput_zip_seek
static int64 MojoInput_zip_tell(MojoInput *io)
{
return ZIP_tell(io->opaque);
} // MojoInput_zip_tell
static int64 MojoInput_zip_length(MojoInput *io)
{
return ZIP_fileLength(io->opaque);
} // MojoInput_zip_length
static MojoInput *buildZipMojoInput(ZIPinfo *info, const char *fullpath);
static MojoInput *MojoInput_zip_duplicate(MojoInput *io)
{
ZIPfileinfo *finfo = (ZIPfileinfo *) io->opaque;
return buildZipMojoInput(finfo->archive, finfo->entry->name);
} // MojoInput_zip_duplicate
static void MojoInput_zip_close(MojoInput *io)
{
ZIP_fileClose(io->opaque);
free(io);
} // MojoInput_zip_close
// MojoArchive implementation...
static int MojoArchive_zip_entry_is_symlink(ZIPinfo *info, ZIPentry *entry)
{
if (entry->resolved == ZIP_UNRESOLVED_SYMLINK) /* gotta resolve it. */
zip_resolve(info->io, info, entry);
return zip_entry_is_symlink(entry);
} // MojoArchive_zip_entry_is_symlink
static boolean MojoArchive_zip_enumerate(MojoArchive *ar)
{
ZIPinfo *info = (ZIPinfo *) ar->opaque;
MojoArchive_resetEntry(&ar->prevEnum);
info->enumIndex = 0;
return true;
} // MojoArchive_zip_enumerate
static const MojoArchiveEntry *MojoArchive_zip_enumNext(MojoArchive *ar)
{
ZIPinfo *info = (ZIPinfo *) ar->opaque;
MojoArchiveEntry *retval = NULL;
MojoArchive_resetEntry(&ar->prevEnum);
if ((info->enumIndex >= 0) && (info->enumIndex < info->entryCount))
{
ZIPentry *entry = &info->entries[info->enumIndex];
ar->prevEnum.filename = xstrdup(entry->name);
ar->prevEnum.filesize = entry->uncompressed_size;
ar->prevEnum.type = MOJOARCHIVE_ENTRY_FILE;
ar->prevEnum.perms = entry->perms;
if (entry->name[strlen(entry->name) - 1] == '/')
ar->prevEnum.type = MOJOARCHIVE_ENTRY_DIR;
else if (MojoArchive_zip_entry_is_symlink(info, entry))
{
ar->prevEnum.type = MOJOARCHIVE_ENTRY_SYMLINK;
ar->prevEnum.linkdest = xstrdup(entry->linkdest);
} // else if
info->enumIndex++;
retval = &ar->prevEnum;
} // if
return retval;
} // MojoArchive_zip_enumNext
static MojoInput *buildZipMojoInput(ZIPinfo *info, const char *fullpath)
{
MojoInput *io = NULL;
int exists = 0;
void *opaque = ZIP_openRead(info, fullpath, &exists);
if (opaque == NULL)
return NULL;
io = (MojoInput *) xmalloc(sizeof (MojoInput));
io->ready = MojoInput_zip_ready;
io->read = MojoInput_zip_read;
io->seek = MojoInput_zip_seek;
io->tell = MojoInput_zip_tell;
io->length = MojoInput_zip_length;
io->duplicate = MojoInput_zip_duplicate;
io->close = MojoInput_zip_close;
io->opaque = opaque;
return io;
} // buildZipMojoInput
static MojoInput *MojoArchive_zip_openCurrentEntry(MojoArchive *ar)
{
MojoInput *retval = NULL;
ZIPinfo *info = (ZIPinfo *) ar->opaque;
const int32 enumIndex = info->enumIndex - 1;
if ((enumIndex >= 0) && (enumIndex < info->entryCount) &&
(ar->prevEnum.type == MOJOARCHIVE_ENTRY_FILE))
{
char *fullpath = (char *) xmalloc(strlen(ar->prevEnum.filename) + 1);
strcpy(fullpath, ar->prevEnum.filename);
retval = buildZipMojoInput(info, fullpath);
free(fullpath);
} // if
return retval;
} // MojoArchive_zip_openCurrentEntry
static void MojoArchive_zip_close(MojoArchive *ar)
{
ZIP_dirClose(ar->opaque);
ar->io->close(ar->io);
MojoArchive_resetEntry(&ar->prevEnum);
free(ar);
} // MojoArchive_zip_close
MojoArchive *MojoArchive_createZIP(MojoInput *io)
{
MojoArchive *ar = NULL;
void *opaque = ZIP_openArchive(io, "", 0);
if (opaque == NULL)
return NULL;
ar = (MojoArchive *) xmalloc(sizeof (MojoArchive));
ar->enumerate = MojoArchive_zip_enumerate;
ar->enumNext = MojoArchive_zip_enumNext;
ar->openCurrentEntry = MojoArchive_zip_openCurrentEntry;
ar->close = MojoArchive_zip_close;
ar->offsetOfStart = ((const ZIPinfo *) opaque)->offset;
ar->opaque = opaque;
ar->io = io;
return ar;
} // MojoArchive_createZIP
#endif // __MOJOSETUP__
#endif // SUPPORT_ZIP
// end of archive_zip.c ...
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