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-rw-r--r--libs/utils/ZipFileRO.cpp460
1 files changed, 294 insertions, 166 deletions
diff --git a/libs/utils/ZipFileRO.cpp b/libs/utils/ZipFileRO.cpp
index 6c701dd0b673..2d53136c1484 100644
--- a/libs/utils/ZipFileRO.cpp
+++ b/libs/utils/ZipFileRO.cpp
@@ -29,6 +29,22 @@
#include <fcntl.h>
#include <errno.h>
#include <assert.h>
+#include <unistd.h>
+
+/*
+ * TEMP_FAILURE_RETRY is defined by some, but not all, versions of
+ * <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's
+ * not already defined, then define it here.
+ */
+#ifndef TEMP_FAILURE_RETRY
+/* Used to retry syscalls that can return EINTR. */
+#define TEMP_FAILURE_RETRY(exp) ({ \
+ typeof (exp) _rc; \
+ do { \
+ _rc = (exp); \
+ } while (_rc == -1 && errno == EINTR); \
+ _rc; })
+#endif
using namespace android;
@@ -38,6 +54,7 @@ using namespace android;
#define kEOCDSignature 0x06054b50
#define kEOCDLen 22
#define kEOCDNumEntries 8 // offset to #of entries in file
+#define kEOCDSize 12 // size of the central directory
#define kEOCDFileOffset 16 // offset to central directory
#define kMaxCommentLen 65535 // longest possible in ushort
@@ -90,9 +107,8 @@ int ZipFileRO::entryToIndex(const ZipEntryRO entry) const
status_t ZipFileRO::open(const char* zipFileName)
{
int fd = -1;
- off_t length;
- assert(mFileMap == NULL);
+ assert(mDirectoryMap == NULL);
/*
* Open and map the specified file.
@@ -103,172 +119,238 @@ status_t ZipFileRO::open(const char* zipFileName)
return NAME_NOT_FOUND;
}
- length = lseek(fd, 0, SEEK_END);
- if (length < 0) {
+ mFileLength = lseek(fd, 0, SEEK_END);
+ if (mFileLength < kEOCDLen) {
close(fd);
return UNKNOWN_ERROR;
}
- mFileMap = new FileMap();
- if (mFileMap == NULL) {
- close(fd);
- return NO_MEMORY;
- }
- if (!mFileMap->create(zipFileName, fd, 0, length, true)) {
- LOGW("Unable to map '%s': %s\n", zipFileName, strerror(errno));
- close(fd);
- return UNKNOWN_ERROR;
+ if (mFileName != NULL) {
+ free(mFileName);
}
+ mFileName = strdup(zipFileName);
mFd = fd;
/*
- * Got it mapped, verify it and create data structures for fast access.
+ * Find the Central Directory and store its size and number of entries.
+ */
+ if (!mapCentralDirectory()) {
+ goto bail;
+ }
+
+ /*
+ * Verify Central Directory and create data structures for fast access.
*/
if (!parseZipArchive()) {
- mFileMap->release();
- mFileMap = NULL;
- return UNKNOWN_ERROR;
+ goto bail;
}
return OK;
+
+bail:
+ free(mFileName);
+ mFileName = NULL;
+ close(fd);
+ return UNKNOWN_ERROR;
}
/*
* Parse the Zip archive, verifying its contents and initializing internal
* data structures.
*/
-bool ZipFileRO::parseZipArchive(void)
+bool ZipFileRO::mapCentralDirectory(void)
{
-#define CHECK_OFFSET(_off) { \
- if ((unsigned int) (_off) >= maxOffset) { \
- LOGE("ERROR: bad offset %u (max %d): %s\n", \
- (unsigned int) (_off), maxOffset, #_off); \
- goto bail; \
- } \
- }
- const unsigned char* basePtr = (const unsigned char*)mFileMap->getDataPtr();
- const unsigned char* ptr;
- size_t length = mFileMap->getDataLength();
- bool result = false;
- unsigned int i, numEntries, cdOffset;
- unsigned int val;
+ size_t readAmount = kMaxEOCDSearch;
+ if (readAmount > (size_t) mFileLength)
+ readAmount = mFileLength;
+
+ unsigned char* scanBuf = (unsigned char*) malloc(readAmount);
+ if (scanBuf == NULL) {
+ LOGW("couldn't allocate scanBuf: %s", strerror(errno));
+ free(scanBuf);
+ return false;
+ }
/*
- * The first 4 bytes of the file will either be the local header
- * signature for the first file (kLFHSignature) or, if the archive doesn't
- * have any files in it, the end-of-central-directory signature
- * (kEOCDSignature).
+ * Make sure this is a Zip archive.
*/
- val = get4LE(basePtr);
- if (val == kEOCDSignature) {
- LOGI("Found Zip archive, but it looks empty\n");
- goto bail;
- } else if (val != kLFHSignature) {
- LOGV("Not a Zip archive (found 0x%08x)\n", val);
- goto bail;
+ if (lseek(mFd, 0, SEEK_SET) != 0) {
+ LOGW("seek to start failed: %s", strerror(errno));
+ free(scanBuf);
+ return false;
+ }
+
+ ssize_t actual = TEMP_FAILURE_RETRY(read(mFd, scanBuf, sizeof(int32_t)));
+ if (actual != (ssize_t) sizeof(int32_t)) {
+ LOGI("couldn't read first signature from zip archive: %s", strerror(errno));
+ free(scanBuf);
+ return false;
+ }
+
+ {
+ unsigned int header = get4LE(scanBuf);
+ if (header == kEOCDSignature) {
+ LOGI("Found Zip archive, but it looks empty\n");
+ free(scanBuf);
+ return false;
+ } else if (header != kLFHSignature) {
+ LOGV("Not a Zip archive (found 0x%08x)\n", val);
+ free(scanBuf);
+ return false;
+ }
}
/*
- * Find the EOCD. We'll find it immediately unless they have a file
- * comment.
+ * Perform the traditional EOCD snipe hunt.
+ *
+ * We're searching for the End of Central Directory magic number,
+ * which appears at the start of the EOCD block. It's followed by
+ * 18 bytes of EOCD stuff and up to 64KB of archive comment. We
+ * need to read the last part of the file into a buffer, dig through
+ * it to find the magic number, parse some values out, and use those
+ * to determine the extent of the CD.
+ *
+ * We start by pulling in the last part of the file.
*/
- ptr = basePtr + length - kEOCDLen;
+ off_t searchStart = mFileLength - readAmount;
- while (ptr >= basePtr) {
- if (*ptr == (kEOCDSignature & 0xff) && get4LE(ptr) == kEOCDSignature)
+ if (lseek(mFd, searchStart, SEEK_SET) != searchStart) {
+ LOGW("seek %ld failed: %s\n", (long) searchStart, strerror(errno));
+ free(scanBuf);
+ return false;
+ }
+ actual = TEMP_FAILURE_RETRY(read(mFd, scanBuf, readAmount));
+ if (actual != (ssize_t) readAmount) {
+ LOGW("Zip: read %zd failed: %s\n", readAmount, strerror(errno));
+ free(scanBuf);
+ return false;
+ }
+
+ /*
+ * Scan backward for the EOCD magic. In an archive without a trailing
+ * comment, we'll find it on the first try. (We may want to consider
+ * doing an initial minimal read; if we don't find it, retry with a
+ * second read as above.)
+ */
+ int i;
+ for (i = readAmount - kEOCDLen; i >= 0; i--) {
+ if (scanBuf[i] == 0x50 && get4LE(&scanBuf[i]) == kEOCDSignature) {
+ LOGV("+++ Found EOCD at buf+%d\n", i);
break;
- ptr--;
+ }
}
- if (ptr < basePtr) {
- LOGI("Could not find end-of-central-directory in Zip\n");
- goto bail;
+ if (i < 0) {
+ LOGD("Zip: EOCD not found, %s is not zip\n", mFileName);
+ free(scanBuf);
+ return false;
}
+ off_t eocdOffset = searchStart + i;
+ const unsigned char* eocdPtr = scanBuf + i;
+
+ assert(eocdOffset < mFileLength);
+
/*
- * There are two interesting items in the EOCD block: the number of
- * entries in the file, and the file offset of the start of the
- * central directory.
- *
- * (There's actually a count of the #of entries in this file, and for
- * all files which comprise a spanned archive, but for our purposes
- * we're only interested in the current file. Besides, we expect the
- * two to be equivalent for our stuff.)
+ * Grab the CD offset and size, and the number of entries in the
+ * archive. After that, we can release our EOCD hunt buffer.
*/
- numEntries = get2LE(ptr + kEOCDNumEntries);
- cdOffset = get4LE(ptr + kEOCDFileOffset);
+ unsigned int numEntries = get2LE(eocdPtr + kEOCDNumEntries);
+ unsigned int dirSize = get4LE(eocdPtr + kEOCDSize);
+ unsigned int dirOffset = get4LE(eocdPtr + kEOCDFileOffset);
+ free(scanBuf);
+
+ // Verify that they look reasonable.
+ if ((long long) dirOffset + (long long) dirSize > (long long) eocdOffset) {
+ LOGW("bad offsets (dir %ld, size %u, eocd %ld)\n",
+ (long) dirOffset, dirSize, (long) eocdOffset);
+ return false;
+ }
+ if (numEntries == 0) {
+ LOGW("empty archive?\n");
+ return false;
+ }
- /* valid offsets are [0,EOCD] */
- unsigned int maxOffset;
- maxOffset = (ptr - basePtr) +1;
+ LOGV("+++ numEntries=%d dirSize=%d dirOffset=%d\n",
+ numEntries, dirSize, dirOffset);
- LOGV("+++ numEntries=%d cdOffset=%d\n", numEntries, cdOffset);
- if (numEntries == 0 || cdOffset >= length) {
- LOGW("Invalid entries=%d offset=%d (len=%zd)\n",
- numEntries, cdOffset, length);
- goto bail;
+ mDirectoryMap = new FileMap();
+ if (mDirectoryMap == NULL) {
+ LOGW("Unable to create directory map: %s", strerror(errno));
+ return false;
}
+ if (!mDirectoryMap->create(mFileName, mFd, dirOffset, dirSize, true)) {
+ LOGW("Unable to map '%s' (%zd to %zd): %s\n", mFileName,
+ dirOffset, dirOffset + dirSize, strerror(errno));
+ return false;
+ }
+
+ mNumEntries = numEntries;
+ mDirectoryOffset = dirOffset;
+
+ return true;
+}
+
+bool ZipFileRO::parseZipArchive(void)
+{
+ bool result = false;
+ const unsigned char* cdPtr = (const unsigned char*) mDirectoryMap->getDataPtr();
+ size_t cdLength = mDirectoryMap->getDataLength();
+ int numEntries = mNumEntries;
+
/*
* Create hash table. We have a minimum 75% load factor, possibly as
* low as 50% after we round off to a power of 2.
*/
- mNumEntries = numEntries;
- mHashTableSize = roundUpPower2(1 + ((numEntries * 4) / 3));
- mHashTable = (HashEntry*) calloc(1, sizeof(HashEntry) * mHashTableSize);
+ mHashTableSize = roundUpPower2(1 + (numEntries * 4) / 3);
+ mHashTable = (HashEntry*) calloc(mHashTableSize, sizeof(HashEntry));
/*
* Walk through the central directory, adding entries to the hash
* table.
*/
- ptr = basePtr + cdOffset;
- for (i = 0; i < numEntries; i++) {
- unsigned int fileNameLen, extraLen, commentLen, localHdrOffset;
- const unsigned char* localHdr;
- unsigned int hash;
-
+ const unsigned char* ptr = cdPtr;
+ for (int i = 0; i < numEntries; i++) {
if (get4LE(ptr) != kCDESignature) {
LOGW("Missed a central dir sig (at %d)\n", i);
goto bail;
}
- if (ptr + kCDELen > basePtr + length) {
+ if (ptr + kCDELen > cdPtr + cdLength) {
LOGW("Ran off the end (at %d)\n", i);
goto bail;
}
- localHdrOffset = get4LE(ptr + kCDELocalOffset);
- CHECK_OFFSET(localHdrOffset);
+ long localHdrOffset = (long) get4LE(ptr + kCDELocalOffset);
+ if (localHdrOffset >= mDirectoryOffset) {
+ LOGW("bad LFH offset %ld at entry %d\n", localHdrOffset, i);
+ goto bail;
+ }
+
+ unsigned int fileNameLen, extraLen, commentLen, hash;
+
fileNameLen = get2LE(ptr + kCDENameLen);
extraLen = get2LE(ptr + kCDEExtraLen);
commentLen = get2LE(ptr + kCDECommentLen);
- //LOGV("+++ %d: localHdr=%d fnl=%d el=%d cl=%d\n",
- // i, localHdrOffset, fileNameLen, extraLen, commentLen);
- //LOGV(" '%.*s'\n", fileNameLen, ptr + kCDELen);
-
/* add the CDE filename to the hash table */
hash = computeHash((const char*)ptr + kCDELen, fileNameLen);
addToHash((const char*)ptr + kCDELen, fileNameLen, hash);
- localHdr = basePtr + localHdrOffset;
- if (get4LE(localHdr) != kLFHSignature) {
- LOGW("Bad offset to local header: %d (at %d)\n",
- localHdrOffset, i);
+ ptr += kCDELen + fileNameLen + extraLen + commentLen;
+ if ((size_t)(ptr - cdPtr) > cdLength) {
+ LOGW("bad CD advance (%d vs %zd) at entry %d\n",
+ (int) (ptr - cdPtr), cdLength, i);
goto bail;
}
-
- ptr += kCDELen + fileNameLen + extraLen + commentLen;
- CHECK_OFFSET(ptr - basePtr);
}
-
+ LOGV("+++ zip good scan %d entries\n", numEntries);
result = true;
bail:
return result;
-#undef CHECK_OFFSET
}
-
/*
* Simple string hash function for non-null-terminated strings.
*/
@@ -315,7 +397,7 @@ ZipEntryRO ZipFileRO::findEntryByName(const char* fileName) const
memcmp(mHashTable[ent].name, fileName, nameLen) == 0)
{
/* match */
- return (ZipEntryRO) (ent + kZipEntryAdj);
+ return (ZipEntryRO)(long)(ent + kZipEntryAdj);
}
ent = (ent + 1) & (mHashTableSize-1);
@@ -354,20 +436,24 @@ ZipEntryRO ZipFileRO::findEntryByIndex(int idx) const
* Returns "false" if the offsets to the fields or the contents of the fields
* appear to be bogus.
*/
-bool ZipFileRO::getEntryInfo(ZipEntryRO entry, int* pMethod, long* pUncompLen,
- long* pCompLen, off_t* pOffset, long* pModWhen, long* pCrc32) const
+bool ZipFileRO::getEntryInfo(ZipEntryRO entry, int* pMethod, size_t* pUncompLen,
+ size_t* pCompLen, off_t* pOffset, long* pModWhen, long* pCrc32) const
{
- int ent = entryToIndex(entry);
+ bool ret = false;
+
+ const int ent = entryToIndex(entry);
if (ent < 0)
return false;
+ HashEntry hashEntry = mHashTable[ent];
+
/*
* Recover the start of the central directory entry from the filename
- * pointer.
+ * pointer. The filename is the first entry past the fixed-size data,
+ * so we can just subtract back from that.
*/
- const unsigned char* basePtr = (const unsigned char*)mFileMap->getDataPtr();
- const unsigned char* ptr = (const unsigned char*) mHashTable[ent].name;
- size_t zipLength = mFileMap->getDataLength();
+ const unsigned char* ptr = (const unsigned char*) hashEntry.name;
+ off_t cdOffset = mDirectoryOffset;
ptr -= kCDELen;
@@ -380,48 +466,78 @@ bool ZipFileRO::getEntryInfo(ZipEntryRO entry, int* pMethod, long* pUncompLen,
if (pCrc32 != NULL)
*pCrc32 = get4LE(ptr + kCDECRC);
+ size_t compLen = get4LE(ptr + kCDECompLen);
+ if (pCompLen != NULL)
+ *pCompLen = compLen;
+ size_t uncompLen = get4LE(ptr + kCDEUncompLen);
+ if (pUncompLen != NULL)
+ *pUncompLen = uncompLen;
+
/*
- * We need to make sure that the lengths are not so large that somebody
- * trying to map the compressed or uncompressed data runs off the end
- * of the mapped region.
+ * If requested, determine the offset of the start of the data. All we
+ * have is the offset to the Local File Header, which is variable size,
+ * so we have to read the contents of the struct to figure out where
+ * the actual data starts.
+ *
+ * We also need to make sure that the lengths are not so large that
+ * somebody trying to map the compressed or uncompressed data runs
+ * off the end of the mapped region.
+ *
+ * Note we don't verify compLen/uncompLen if they don't request the
+ * dataOffset, because dataOffset is expensive to determine. However,
+ * if they don't have the file offset, they're not likely to be doing
+ * anything with the contents.
*/
- unsigned long localHdrOffset = get4LE(ptr + kCDELocalOffset);
- if (localHdrOffset + kLFHLen >= zipLength) {
- LOGE("ERROR: bad local hdr offset in zip\n");
- return false;
- }
- const unsigned char* localHdr = basePtr + localHdrOffset;
- off_t dataOffset = localHdrOffset + kLFHLen
- + get2LE(localHdr + kLFHNameLen) + get2LE(localHdr + kLFHExtraLen);
- if ((unsigned long) dataOffset >= zipLength) {
- LOGE("ERROR: bad data offset in zip\n");
- return false;
- }
+ if (pOffset != NULL) {
+ long localHdrOffset = get4LE(ptr + kCDELocalOffset);
+ if (localHdrOffset + kLFHLen >= cdOffset) {
+ LOGE("ERROR: bad local hdr offset in zip\n");
+ return false;
+ }
- if (pCompLen != NULL) {
- *pCompLen = get4LE(ptr + kCDECompLen);
- if (*pCompLen < 0 || (size_t)(dataOffset + *pCompLen) >= zipLength) {
- LOGE("ERROR: bad compressed length in zip\n");
+ unsigned char lfhBuf[kLFHLen];
+ if (lseek(mFd, localHdrOffset, SEEK_SET) != localHdrOffset) {
+ LOGW("failed seeking to lfh at offset %ld\n", localHdrOffset);
return false;
}
- }
- if (pUncompLen != NULL) {
- *pUncompLen = get4LE(ptr + kCDEUncompLen);
- if (*pUncompLen < 0) {
- LOGE("ERROR: negative uncompressed length in zip\n");
+ ssize_t actual =
+ TEMP_FAILURE_RETRY(read(mFd, lfhBuf, sizeof(lfhBuf)));
+ if (actual != sizeof(lfhBuf)) {
+ LOGW("failed reading lfh from offset %ld\n", localHdrOffset);
+ return false;
+ }
+
+ if (get4LE(lfhBuf) != kLFHSignature) {
+ LOGW("didn't find signature at start of lfh, offset=%ld (got 0x%08lx, expected 0x%08x)\n",
+ localHdrOffset, get4LE(lfhBuf), kLFHSignature);
return false;
}
+
+ off_t dataOffset = localHdrOffset + kLFHLen
+ + get2LE(lfhBuf + kLFHNameLen) + get2LE(lfhBuf + kLFHExtraLen);
+ if (dataOffset >= cdOffset) {
+ LOGW("bad data offset %ld in zip\n", (long) dataOffset);
+ return false;
+ }
+
+ /* check lengths */
+ if ((off_t)(dataOffset + compLen) > cdOffset) {
+ LOGW("bad compressed length in zip (%ld + %zd > %ld)\n",
+ (long) dataOffset, compLen, (long) cdOffset);
+ return false;
+ }
+
if (method == kCompressStored &&
- (size_t)(dataOffset + *pUncompLen) >= zipLength)
+ (off_t)(dataOffset + uncompLen) > cdOffset)
{
- LOGE("ERROR: bad uncompressed length in zip\n");
+ LOGE("ERROR: bad uncompressed length in zip (%ld + %zd > %ld)\n",
+ (long) dataOffset, uncompLen, (long) cdOffset);
return false;
}
- }
- if (pOffset != NULL) {
*pOffset = dataOffset;
}
+
return true;
}
@@ -457,14 +573,14 @@ FileMap* ZipFileRO::createEntryFileMap(ZipEntryRO entry) const
*/
FileMap* newMap;
- long compLen;
+ size_t compLen;
off_t offset;
if (!getEntryInfo(entry, NULL, NULL, &compLen, &offset, NULL, NULL))
return NULL;
newMap = new FileMap();
- if (!newMap->create(mFileMap->getFileName(), mFd, offset, compLen, true)) {
+ if (!newMap->create(mFileName, mFd, offset, compLen, true)) {
newMap->release();
return NULL;
}
@@ -480,19 +596,26 @@ FileMap* ZipFileRO::createEntryFileMap(ZipEntryRO entry) const
*/
bool ZipFileRO::uncompressEntry(ZipEntryRO entry, void* buffer) const
{
- const int kSequentialMin = 32768;
+ const size_t kSequentialMin = 32768;
bool result = false;
int ent = entryToIndex(entry);
if (ent < 0)
return -1;
- const unsigned char* basePtr = (const unsigned char*)mFileMap->getDataPtr();
int method;
- long uncompLen, compLen;
+ size_t uncompLen, compLen;
off_t offset;
+ const unsigned char* ptr;
getEntryInfo(entry, &method, &uncompLen, &compLen, &offset, NULL, NULL);
+ FileMap* file = createEntryFileMap(entry);
+ if (file == NULL) {
+ goto bail;
+ }
+
+ ptr = (const unsigned char*) file->getDataPtr();
+
/*
* Experiment with madvise hint. When we want to uncompress a file,
* we pull some stuff out of the central dir entry and then hit a
@@ -507,17 +630,17 @@ bool ZipFileRO::uncompressEntry(ZipEntryRO entry, void* buffer) const
* pair of system calls are negated by a reduction in page faults.
*/
if (compLen > kSequentialMin)
- mFileMap->advise(FileMap::SEQUENTIAL);
+ file->advise(FileMap::SEQUENTIAL);
if (method == kCompressStored) {
- memcpy(buffer, basePtr + offset, uncompLen);
+ memcpy(buffer, ptr, uncompLen);
} else {
- if (!inflateBuffer(buffer, basePtr + offset, uncompLen, compLen))
+ if (!inflateBuffer(buffer, ptr, uncompLen, compLen))
goto bail;
}
if (compLen > kSequentialMin)
- mFileMap->advise(FileMap::NORMAL);
+ file->advise(FileMap::NORMAL);
result = true;
@@ -537,29 +660,34 @@ bool ZipFileRO::uncompressEntry(ZipEntryRO entry, int fd) const
if (ent < 0)
return -1;
- const unsigned char* basePtr = (const unsigned char*)mFileMap->getDataPtr();
int method;
- long uncompLen, compLen;
+ size_t uncompLen, compLen;
off_t offset;
+ const unsigned char* ptr;
getEntryInfo(entry, &method, &uncompLen, &compLen, &offset, NULL, NULL);
- if (method == kCompressStored) {
- ssize_t actual;
+ const FileMap* file = createEntryFileMap(entry);
+ if (file == NULL) {
+ goto bail;
+ }
+
+ ptr = (const unsigned char*) file->getDataPtr();
- actual = write(fd, basePtr + offset, uncompLen);
+ if (method == kCompressStored) {
+ ssize_t actual = write(fd, ptr, uncompLen);
if (actual < 0) {
LOGE("Write failed: %s\n", strerror(errno));
goto bail;
- } else if (actual != uncompLen) {
- LOGE("Partial write during uncompress (%d of %ld)\n",
- (int)actual, uncompLen);
+ } else if ((size_t) actual != uncompLen) {
+ LOGE("Partial write during uncompress (%zd of %zd)\n",
+ (size_t)actual, (size_t)uncompLen);
goto bail;
} else {
LOGI("+++ successful write\n");
}
} else {
- if (!inflateBuffer(fd, basePtr+offset, uncompLen, compLen))
+ if (!inflateBuffer(fd, ptr, uncompLen, compLen))
goto bail;
}
@@ -573,7 +701,7 @@ bail:
* Uncompress "deflate" data from one buffer to another.
*/
/*static*/ bool ZipFileRO::inflateBuffer(void* outBuf, const void* inBuf,
- long uncompLen, long compLen)
+ size_t uncompLen, size_t compLen)
{
bool result = false;
z_stream zstream;
@@ -582,7 +710,7 @@ bail:
/*
* Initialize the zlib stream struct.
*/
- memset(&zstream, 0, sizeof(zstream));
+ memset(&zstream, 0, sizeof(zstream));
zstream.zalloc = Z_NULL;
zstream.zfree = Z_NULL;
zstream.opaque = Z_NULL;
@@ -592,10 +720,10 @@ bail:
zstream.avail_out = uncompLen;
zstream.data_type = Z_UNKNOWN;
- /*
- * Use the undocumented "negative window bits" feature to tell zlib
- * that there's no zlib header waiting for it.
- */
+ /*
+ * Use the undocumented "negative window bits" feature to tell zlib
+ * that there's no zlib header waiting for it.
+ */
zerr = inflateInit2(&zstream, -MAX_WBITS);
if (zerr != Z_OK) {
if (zerr == Z_VERSION_ERROR) {
@@ -619,8 +747,8 @@ bail:
}
/* paranoia */
- if ((long) zstream.total_out != uncompLen) {
- LOGW("Size mismatch on inflated file (%ld vs %ld)\n",
+ if (zstream.total_out != uncompLen) {
+ LOGW("Size mismatch on inflated file (%ld vs %zd)\n",
zstream.total_out, uncompLen);
goto z_bail;
}
@@ -638,10 +766,10 @@ bail:
* Uncompress "deflate" data from one buffer to an open file descriptor.
*/
/*static*/ bool ZipFileRO::inflateBuffer(int fd, const void* inBuf,
- long uncompLen, long compLen)
+ size_t uncompLen, size_t compLen)
{
bool result = false;
- const int kWriteBufSize = 32768;
+ const size_t kWriteBufSize = 32768;
unsigned char writeBuf[kWriteBufSize];
z_stream zstream;
int zerr;
@@ -649,7 +777,7 @@ bail:
/*
* Initialize the zlib stream struct.
*/
- memset(&zstream, 0, sizeof(zstream));
+ memset(&zstream, 0, sizeof(zstream));
zstream.zalloc = Z_NULL;
zstream.zfree = Z_NULL;
zstream.opaque = Z_NULL;
@@ -659,10 +787,10 @@ bail:
zstream.avail_out = sizeof(writeBuf);
zstream.data_type = Z_UNKNOWN;
- /*
- * Use the undocumented "negative window bits" feature to tell zlib
- * that there's no zlib header waiting for it.
- */
+ /*
+ * Use the undocumented "negative window bits" feature to tell zlib
+ * that there's no zlib header waiting for it.
+ */
zerr = inflateInit2(&zstream, -MAX_WBITS);
if (zerr != Z_OK) {
if (zerr == Z_VERSION_ERROR) {
@@ -708,8 +836,8 @@ bail:
assert(zerr == Z_STREAM_END); /* other errors should've been caught */
/* paranoia */
- if ((long) zstream.total_out != uncompLen) {
- LOGW("Size mismatch on inflated file (%ld vs %ld)\n",
+ if (zstream.total_out != uncompLen) {
+ LOGW("Size mismatch on inflated file (%ld vs %zd)\n",
zstream.total_out, uncompLen);
goto z_bail;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 14:35:01 +0000