1 files changed, 0 insertions, 1168 deletions

diff --git a/minzipold/Zip.c b/minzipold/Zip.c
deleted file mode 100644
index 439e5d9cd..000000000
--- a/minzipold/Zip.c
+++ /dev/null
@@ -1,1168 +0,0 @@
-/*
- * Copyright 2006 The Android Open Source Project
- *
- * Simple Zip file support.
- */
-#include "safe_iop.h"
-#include "zlib.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <stdint.h>     // for uintptr_t
-#include <stdlib.h>
-#include <sys/stat.h>   // for S_ISLNK()
-#include <unistd.h>
-
-#define LOG_TAG "minzip"
-#include "Zip.h"
-#include "Bits.h"
-#include "Log.h"
-#include "DirUtil.h"
-
-#undef NDEBUG   // do this after including Log.h
-#include <assert.h>
-
-#define SORT_ENTRIES 1
-
-/*
- * Offset and length constants (java.util.zip naming convention).
- */
-enum {
-    CENSIG = 0x02014b50,      // PK12
-    CENHDR = 46,
-
-    CENVEM =  4,
-    CENVER =  6,
-    CENFLG =  8,
-    CENHOW = 10,
-    CENTIM = 12,
-    CENCRC = 16,
-    CENSIZ = 20,
-    CENLEN = 24,
-    CENNAM = 28,
-    CENEXT = 30,
-    CENCOM = 32,
-    CENDSK = 34,
-    CENATT = 36,
-    CENATX = 38,
-    CENOFF = 42,
-
-    ENDSIG = 0x06054b50,     // PK56
-    ENDHDR = 22,
-
-    ENDSUB =  8,
-    ENDTOT = 10,
-    ENDSIZ = 12,
-    ENDOFF = 16,
-    ENDCOM = 20,
-
-    EXTSIG = 0x08074b50,     // PK78
-    EXTHDR = 16,
-
-    EXTCRC =  4,
-    EXTSIZ =  8,
-    EXTLEN = 12,
-
-    LOCSIG = 0x04034b50,      // PK34
-    LOCHDR = 30,
-
-    LOCVER =  4,
-    LOCFLG =  6,
-    LOCHOW =  8,
-    LOCTIM = 10,
-    LOCCRC = 14,
-    LOCSIZ = 18,
-    LOCLEN = 22,
-    LOCNAM = 26,
-    LOCEXT = 28,
-
-    STORED = 0,
-    DEFLATED = 8,
-
-    CENVEM_UNIX = 3 << 8,   // the high byte of CENVEM
-};
-
-
-/*
- * For debugging, dump the contents of a ZipEntry.
- */
-#if 0
-static void dumpEntry(const ZipEntry* pEntry)
-{
-    LOGI(" %p '%.*s'\n", pEntry->fileName,pEntry->fileNameLen,pEntry->fileName);
-    LOGI("   off=%ld comp=%ld uncomp=%ld how=%d\n", pEntry->offset,
-        pEntry->compLen, pEntry->uncompLen, pEntry->compression);
-}
-#endif
-
-/*
- * (This is a mzHashTableLookup callback.)
- *
- * Compare two ZipEntry structs, by name.
- */
-static int hashcmpZipEntry(const void* ventry1, const void* ventry2)
-{
-    const ZipEntry* entry1 = (const ZipEntry*) ventry1;
-    const ZipEntry* entry2 = (const ZipEntry*) ventry2;
-
-    if (entry1->fileNameLen != entry2->fileNameLen)
-        return entry1->fileNameLen - entry2->fileNameLen;
-    return memcmp(entry1->fileName, entry2->fileName, entry1->fileNameLen);
-}
-
-/*
- * (This is a mzHashTableLookup callback.)
- *
- * find a ZipEntry struct by name.
- */
-static int hashcmpZipName(const void* ventry, const void* vname)
-{
-    const ZipEntry* entry = (const ZipEntry*) ventry;
-    const char* name = (const char*) vname;
-    unsigned int nameLen = strlen(name);
-
-    if (entry->fileNameLen != nameLen)
-        return entry->fileNameLen - nameLen;
-    return memcmp(entry->fileName, name, nameLen);
-}
-
-/*
- * Compute the hash code for a ZipEntry filename.
- *
- * Not expected to be compatible with any other hash function, so we init
- * to 2 to ensure it doesn't happen to match.
- */
-static unsigned int computeHash(const char* name, int nameLen)
-{
-    unsigned int hash = 2;
-
-    while (nameLen--)
-        hash = hash * 31 + *name++;
-
-    return hash;
-}
-
-static void addEntryToHashTable(HashTable* pHash, ZipEntry* pEntry)
-{
-    unsigned int itemHash = computeHash(pEntry->fileName, pEntry->fileNameLen);
-    const ZipEntry* found;
-
-    found = (const ZipEntry*)mzHashTableLookup(pHash,
-                itemHash, pEntry, hashcmpZipEntry, true);
-    if (found != pEntry) {
-        LOGW("WARNING: duplicate entry '%.*s' in Zip\n",
-            found->fileNameLen, found->fileName);
-        /* keep going */
-    }
-}
-
-static int validFilename(const char *fileName, unsigned int fileNameLen)
-{
-    // Forbid super long filenames.
-    if (fileNameLen >= PATH_MAX) {
-        LOGW("Filename too long (%d chatacters)\n", fileNameLen);
-        return 0;
-    }
-
-    // Require all characters to be printable ASCII (no NUL, no UTF-8, etc).
-    unsigned int i;
-    for (i = 0; i < fileNameLen; ++i) {
-        if (fileName[i] < 32 || fileName[i] >= 127) {
-            LOGW("Filename contains invalid character '\%03o'\n", fileName[i]);
-            return 0;
-        }
-    }
-
-    return 1;
-}
-
-/*
- * Parse the contents of a Zip archive.  After confirming that the file
- * is in fact a Zip, we scan out the contents of the central directory and
- * store it in a hash table.
- *
- * Returns "true" on success.
- */
-static bool parseZipArchive(ZipArchive* pArchive, const MemMapping* pMap)
-{
-    bool result = false;
-    const unsigned char* ptr;
-    unsigned int i, numEntries, cdOffset;
-    unsigned int val;
-
-    /*
-     * The first 4 bytes of the file will either be the local header
-     * signature for the first file (LOCSIG) or, if the archive doesn't
-     * have any files in it, the end-of-central-directory signature (ENDSIG).
-     */
-    val = get4LE(pMap->addr);
-    if (val == ENDSIG) {
-        LOGI("Found Zip archive, but it looks empty\n");
-        goto bail;
-    } else if (val != LOCSIG) {
-        LOGV("Not a Zip archive (found 0x%08x)\n", val);
-        goto bail;
-    }
-
-    /*
-     * Find the EOCD.  We'll find it immediately unless they have a file
-     * comment.
-     */
-    ptr = pMap->addr + pMap->length - ENDHDR;
-
-    while (ptr >= (const unsigned char*) pMap->addr) {
-        if (*ptr == (ENDSIG & 0xff) && get4LE(ptr) == ENDSIG)
-            break;
-        ptr--;
-    }
-    if (ptr < (const unsigned char*) pMap->addr) {
-        LOGI("Could not find end-of-central-directory in Zip\n");
-        goto bail;
-    }
-
-    /*
-     * 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.
-     */
-    numEntries = get2LE(ptr + ENDSUB);
-    cdOffset = get4LE(ptr + ENDOFF);
-
-    LOGVV("numEntries=%d cdOffset=%d\n", numEntries, cdOffset);
-    if (numEntries == 0 || cdOffset >= pMap->length) {
-        LOGW("Invalid entries=%d offset=%d (len=%zd)\n",
-            numEntries, cdOffset, pMap->length);
-        goto bail;
-    }
-
-    /*
-     * Create data structures to hold entries.
-     */
-    pArchive->numEntries = numEntries;
-    pArchive->pEntries = (ZipEntry*) calloc(numEntries, sizeof(ZipEntry));
-    pArchive->pHash = mzHashTableCreate(mzHashSize(numEntries), NULL);
-    if (pArchive->pEntries == NULL || pArchive->pHash == NULL)
-        goto bail;
-
-    ptr = pMap->addr + cdOffset;
-    for (i = 0; i < numEntries; i++) {
-        ZipEntry* pEntry;
-        unsigned int fileNameLen, extraLen, commentLen, localHdrOffset;
-        const unsigned char* localHdr;
-        const char *fileName;
-
-        if (ptr + CENHDR > (const unsigned char*)pMap->addr + pMap->length) {
-            LOGW("Ran off the end (at %d)\n", i);
-            goto bail;
-        }
-        if (get4LE(ptr) != CENSIG) {
-            LOGW("Missed a central dir sig (at %d)\n", i);
-            goto bail;
-        }
-
-        localHdrOffset = get4LE(ptr + CENOFF);
-        fileNameLen = get2LE(ptr + CENNAM);
-        extraLen = get2LE(ptr + CENEXT);
-        commentLen = get2LE(ptr + CENCOM);
-        fileName = (const char*)ptr + CENHDR;
-        if (fileName + fileNameLen > (const char*)pMap->addr + pMap->length) {
-            LOGW("Filename ran off the end (at %d)\n", i);
-            goto bail;
-        }
-        if (!validFilename(fileName, fileNameLen)) {
-            LOGW("Invalid filename (at %d)\n", i);
-            goto bail;
-        }
-
-#if SORT_ENTRIES
-        /* Figure out where this entry should go (binary search).
-         */
-        if (i > 0) {
-            int low, high;
-
-            low = 0;
-            high = i - 1;
-            while (low <= high) {
-                int mid;
-                int diff;
-                int diffLen;
-
-                mid = low + ((high - low) / 2); // avoid overflow
-
-                if (pArchive->pEntries[mid].fileNameLen < fileNameLen) {
-                    diffLen = pArchive->pEntries[mid].fileNameLen;
-                } else {
-                    diffLen = fileNameLen;
-                }
-                diff = strncmp(pArchive->pEntries[mid].fileName, fileName,
-                        diffLen);
-                if (diff == 0) {
-                    diff = pArchive->pEntries[mid].fileNameLen - fileNameLen;
-                }
-                if (diff < 0) {
-                    low = mid + 1;
-                } else if (diff > 0) {
-                    high = mid - 1;
-                } else {
-                    high = mid;
-                    break;
-                }
-            }
-
-            unsigned int target = high + 1;
-            assert(target <= i);
-            if (target != i) {
-                /* It belongs somewhere other than at the end of
-                 * the list.  Make some room at [target].
-                 */
-                memmove(pArchive->pEntries + target + 1,
-                        pArchive->pEntries + target,
-                        (i - target) * sizeof(ZipEntry));
-            }
-            pEntry = &pArchive->pEntries[target];
-        } else {
-            pEntry = &pArchive->pEntries[0];
-        }
-#else
-        pEntry = &pArchive->pEntries[i];
-#endif
-
-        //LOGI("%d: localHdr=%d fnl=%d el=%d cl=%d\n",
-        //    i, localHdrOffset, fileNameLen, extraLen, commentLen);
-
-        pEntry->fileNameLen = fileNameLen;
-        pEntry->fileName = fileName;
-
-        pEntry->compLen = get4LE(ptr + CENSIZ);
-        pEntry->uncompLen = get4LE(ptr + CENLEN);
-        pEntry->compression = get2LE(ptr + CENHOW);
-        pEntry->modTime = get4LE(ptr + CENTIM);
-        pEntry->crc32 = get4LE(ptr + CENCRC);
-
-        /* These two are necessary for finding the mode of the file.
-         */
-        pEntry->versionMadeBy = get2LE(ptr + CENVEM);
-        if ((pEntry->versionMadeBy & 0xff00) != 0 &&
-                (pEntry->versionMadeBy & 0xff00) != CENVEM_UNIX)
-        {
-            LOGW("Incompatible \"version made by\": 0x%02x (at %d)\n",
-                    pEntry->versionMadeBy >> 8, i);
-            goto bail;
-        }
-        pEntry->externalFileAttributes = get4LE(ptr + CENATX);
-
-        // Perform pMap->addr + localHdrOffset, ensuring that it won't
-        // overflow. This is needed because localHdrOffset is untrusted.
-        if (!safe_add((uintptr_t *)&localHdr, (uintptr_t)pMap->addr,
-            (uintptr_t)localHdrOffset)) {
-            LOGW("Integer overflow adding in parseZipArchive\n");
-            goto bail;
-        }
-        if ((uintptr_t)localHdr + LOCHDR >
-            (uintptr_t)pMap->addr + pMap->length) {
-            LOGW("Bad offset to local header: %d (at %d)\n", localHdrOffset, i);
-            goto bail;
-        }
-        if (get4LE(localHdr) != LOCSIG) {
-            LOGW("Missed a local header sig (at %d)\n", i);
-            goto bail;
-        }
-        pEntry->offset = localHdrOffset + LOCHDR
-            + get2LE(localHdr + LOCNAM) + get2LE(localHdr + LOCEXT);
-        if (!safe_add(NULL, pEntry->offset, pEntry->compLen)) {
-            LOGW("Integer overflow adding in parseZipArchive\n");
-            goto bail;
-        }
-        if ((size_t)pEntry->offset + pEntry->compLen > pMap->length) {
-            LOGW("Data ran off the end (at %d)\n", i);
-            goto bail;
-        }
-
-#if !SORT_ENTRIES
-        /* Add to hash table; no need to lock here.
-         * Can't do this now if we're sorting, because entries
-         * will move around.
-         */
-        addEntryToHashTable(pArchive->pHash, pEntry);
-#endif
-
-        //dumpEntry(pEntry);
-        ptr += CENHDR + fileNameLen + extraLen + commentLen;
-    }
-
-#if SORT_ENTRIES
-    /* If we're sorting, we have to wait until all entries
-     * are in their final places, otherwise the pointers will
-     * probably point to the wrong things.
-     */
-    for (i = 0; i < numEntries; i++) {
-        /* Add to hash table; no need to lock here.
-         */
-        addEntryToHashTable(pArchive->pHash, &pArchive->pEntries[i]);
-    }
-#endif
-
-    result = true;
-
-bail:
-    if (!result) {
-        mzHashTableFree(pArchive->pHash);
-        pArchive->pHash = NULL;
-    }
-    return result;
-}
-
-/*
- * Open a Zip archive and scan out the contents.
- *
- * The easiest way to do this is to mmap() the whole thing and do the
- * traditional backward scan for central directory.  Since the EOCD is
- * a relatively small bit at the end, we should end up only touching a
- * small set of pages.
- *
- * This will be called on non-Zip files, especially during startup, so
- * we don't want to be too noisy about failures.  (Do we want a "quiet"
- * flag?)
- *
- * On success, we fill out the contents of "pArchive".
- */
-int mzOpenZipArchive(const char* fileName, ZipArchive* pArchive)
-{
-    MemMapping map;
-    int err;
-
-    LOGV("Opening archive '%s' %p\n", fileName, pArchive);
-
-    map.addr = NULL;
-    memset(pArchive, 0, sizeof(*pArchive));
-
-    pArchive->fd = open(fileName, O_RDONLY, 0);
-    if (pArchive->fd < 0) {
-        err = errno ? errno : -1;
-        LOGV("Unable to open '%s': %s\n", fileName, strerror(err));
-        goto bail;
-    }
-
-    if (sysMapFileInShmem(pArchive->fd, &map) != 0) {
-        err = -1;
-        LOGW("Map of '%s' failed\n", fileName);
-        goto bail;
-    }
-
-    if (map.length < ENDHDR) {
-        err = -1;
-        LOGV("File '%s' too small to be zip (%zd)\n", fileName, map.length);
-        goto bail;
-    }
-
-    if (!parseZipArchive(pArchive, &map)) {
-        err = -1;
-        LOGV("Parsing '%s' failed\n", fileName);
-        goto bail;
-    }
-
-    err = 0;
-    sysCopyMap(&pArchive->map, &map);
-    map.addr = NULL;
-
-bail:
-    if (err != 0)
-        mzCloseZipArchive(pArchive);
-    if (map.addr != NULL)
-        sysReleaseShmem(&map);
-    return err;
-}
-
-/*
- * Close a ZipArchive, closing the file and freeing the contents.
- *
- * NOTE: the ZipArchive may not have been fully created.
- */
-void mzCloseZipArchive(ZipArchive* pArchive)
-{
-    LOGV("Closing archive %p\n", pArchive);
-
-    if (pArchive->fd >= 0)
-        close(pArchive->fd);
-    if (pArchive->map.addr != NULL)
-        sysReleaseShmem(&pArchive->map);
-
-    free(pArchive->pEntries);
-
-    mzHashTableFree(pArchive->pHash);
-
-    pArchive->fd = -1;
-    pArchive->pHash = NULL;
-    pArchive->pEntries = NULL;
-}
-
-/*
- * Find a matching entry.
- *
- * Returns NULL if no matching entry found.
- */
-const ZipEntry* mzFindZipEntry(const ZipArchive* pArchive,
-        const char* entryName)
-{
-    unsigned int itemHash = computeHash(entryName, strlen(entryName));
-
-    return (const ZipEntry*)mzHashTableLookup(pArchive->pHash,
-                itemHash, (char*) entryName, hashcmpZipName, false);
-}
-
-/*
- * Return true if the entry is a symbolic link.
- */
-bool mzIsZipEntrySymlink(const ZipEntry* pEntry)
-{
-    if ((pEntry->versionMadeBy & 0xff00) == CENVEM_UNIX) {
-        return S_ISLNK(pEntry->externalFileAttributes >> 16);
-    }
-    return false;
-}
-
-/* Call processFunction on the uncompressed data of a STORED entry.
- */
-static bool processStoredEntry(const ZipArchive *pArchive,
-    const ZipEntry *pEntry, ProcessZipEntryContentsFunction processFunction,
-    void *cookie)
-{
-    size_t bytesLeft = pEntry->compLen;
-    while (bytesLeft > 0) {
-        unsigned char buf[32 * 1024];
-        ssize_t n;
-        size_t count;
-        bool ret;
-
-        count = bytesLeft;
-        if (count > sizeof(buf)) {
-            count = sizeof(buf);
-        }
-        n = read(pArchive->fd, buf, count);
-        if (n < 0 || (size_t)n != count) {
-            LOGE("Can't read %zu bytes from zip file: %ld\n", count, n);
-            return false;
-        }
-        ret = processFunction(buf, n, cookie);
-        if (!ret) {
-            return false;
-        }
-        bytesLeft -= count;
-    }
-    return true;
-}
-
-static bool processDeflatedEntry(const ZipArchive *pArchive,
-    const ZipEntry *pEntry, ProcessZipEntryContentsFunction processFunction,
-    void *cookie)
-{
-    long result = -1;
-    unsigned char readBuf[32 * 1024];
-    unsigned char procBuf[32 * 1024];
-    z_stream zstream;
-    int zerr;
-    long compRemaining;
-
-    compRemaining = pEntry->compLen;
-
-    /*
-     * Initialize the zlib stream.
-     */
-    memset(&zstream, 0, sizeof(zstream));
-    zstream.zalloc = Z_NULL;
-    zstream.zfree = Z_NULL;
-    zstream.opaque = Z_NULL;
-    zstream.next_in = NULL;
-    zstream.avail_in = 0;
-    zstream.next_out = (Bytef*) procBuf;
-    zstream.avail_out = sizeof(procBuf);
-    zstream.data_type = Z_UNKNOWN;
-
-    /*
-     * 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) {
-            LOGE("Installed zlib is not compatible with linked version (%s)\n",
-                ZLIB_VERSION);
-        } else {
-            LOGE("Call to inflateInit2 failed (zerr=%d)\n", zerr);
-        }
-        goto bail;
-    }
-
-    /*
-     * Loop while we have data.
-     */
-    do {
-        /* read as much as we can */
-        if (zstream.avail_in == 0) {
-            long getSize = (compRemaining > (long)sizeof(readBuf)) ?
-                        (long)sizeof(readBuf) : compRemaining;
-            LOGVV("+++ reading %ld bytes (%ld left)\n",
-                getSize, compRemaining);
-
-            int cc = read(pArchive->fd, readBuf, getSize);
-            if (cc != (int) getSize) {
-                LOGW("inflate read failed (%d vs %ld)\n", cc, getSize);
-                goto z_bail;
-            }
-
-            compRemaining -= getSize;
-
-            zstream.next_in = readBuf;
-            zstream.avail_in = getSize;
-        }
-
-        /* uncompress the data */
-        zerr = inflate(&zstream, Z_NO_FLUSH);
-        if (zerr != Z_OK && zerr != Z_STREAM_END) {
-            LOGD("zlib inflate call failed (zerr=%d)\n", zerr);
-            goto z_bail;
-        }
-
-        /* write when we're full or when we're done */
-        if (zstream.avail_out == 0 ||
-            (zerr == Z_STREAM_END && zstream.avail_out != sizeof(procBuf)))
-        {
-            long procSize = zstream.next_out - procBuf;
-            LOGVV("+++ processing %d bytes\n", (int) procSize);
-            bool ret = processFunction(procBuf, procSize, cookie);
-            if (!ret) {
-                LOGW("Process function elected to fail (in inflate)\n");
-                goto z_bail;
-            }
-
-            zstream.next_out = procBuf;
-            zstream.avail_out = sizeof(procBuf);
-        }
-    } while (zerr == Z_OK);
-
-    assert(zerr == Z_STREAM_END);       /* other errors should've been caught */
-
-    // success!
-    result = zstream.total_out;
-
-z_bail:
-    inflateEnd(&zstream);        /* free up any allocated structures */
-
-bail:
-    if (result != pEntry->uncompLen) {
-        if (result != -1)        // error already shown?
-            LOGW("Size mismatch on inflated file (%ld vs %ld)\n",
-                result, pEntry->uncompLen);
-        return false;
-    }
-    return true;
-}
-
-/*
- * Stream the uncompressed data through the supplied function,
- * passing cookie to it each time it gets called.  processFunction
- * may be called more than once.
- *
- * If processFunction returns false, the operation is abandoned and
- * mzProcessZipEntryContents() immediately returns false.
- *
- * This is useful for calculating the hash of an entry's uncompressed contents.
- */
-bool mzProcessZipEntryContents(const ZipArchive *pArchive,
-    const ZipEntry *pEntry, ProcessZipEntryContentsFunction processFunction,
-    void *cookie)
-{
-    bool ret = false;
-    off_t oldOff;
-
-    /* save current offset */
-    oldOff = lseek(pArchive->fd, 0, SEEK_CUR);
-
-    /* Seek to the beginning of the entry's compressed data. */
-    lseek(pArchive->fd, pEntry->offset, SEEK_SET);
-
-    switch (pEntry->compression) {
-    case STORED:
-        ret = processStoredEntry(pArchive, pEntry, processFunction, cookie);
-        break;
-    case DEFLATED:
-        ret = processDeflatedEntry(pArchive, pEntry, processFunction, cookie);
-        break;
-    default:
-        LOGE("Unsupported compression type %d for entry '%s'\n",
-                pEntry->compression, pEntry->fileName);
-        break;
-    }
-
-    /* restore file offset */
-    lseek(pArchive->fd, oldOff, SEEK_SET);
-    return ret;
-}
-
-static bool crcProcessFunction(const unsigned char *data, int dataLen,
-        void *crc)
-{
-    *(unsigned long *)crc = crc32(*(unsigned long *)crc, data, dataLen);
-    return true;
-}
-
-/*
- * Check the CRC on this entry; return true if it is correct.
- * May do other internal checks as well.
- */
-bool mzIsZipEntryIntact(const ZipArchive *pArchive, const ZipEntry *pEntry)
-{
-    unsigned long crc;
-    bool ret;
-
-    crc = crc32(0L, Z_NULL, 0);
-    ret = mzProcessZipEntryContents(pArchive, pEntry, crcProcessFunction,
-            (void *)&crc);
-    if (!ret) {
-        LOGE("Can't calculate CRC for entry\n");
-        return false;
-    }
-    if (crc != (unsigned long)pEntry->crc32) {
-        LOGW("CRC for entry %.*s (0x%08lx) != expected (0x%08lx)\n",
-                pEntry->fileNameLen, pEntry->fileName, crc, pEntry->crc32);
-        return false;
-    }
-    return true;
-}
-
-typedef struct {
-    char *buf;
-    int bufLen;
-} CopyProcessArgs;
-
-static bool copyProcessFunction(const unsigned char *data, int dataLen,
-        void *cookie)
-{
-    CopyProcessArgs *args = (CopyProcessArgs *)cookie;
-    if (dataLen <= args->bufLen) {
-        memcpy(args->buf, data, dataLen);
-        args->buf += dataLen;
-        args->bufLen -= dataLen;
-        return true;
-    }
-    return false;
-}
-
-/*
- * Read an entry into a buffer allocated by the caller.
- */
-bool mzReadZipEntry(const ZipArchive* pArchive, const ZipEntry* pEntry,
-        char *buf, int bufLen)
-{
-    CopyProcessArgs args;
-    bool ret;
-
-    args.buf = buf;
-    args.bufLen = bufLen;
-    ret = mzProcessZipEntryContents(pArchive, pEntry, copyProcessFunction,
-            (void *)&args);
-    if (!ret) {
-        LOGE("Can't extract entry to buffer.\n");
-        return false;
-    }
-    return true;
-}
-
-static bool writeProcessFunction(const unsigned char *data, int dataLen,
-                                 void *cookie)
-{
-    int fd = (int)cookie;
-
-    ssize_t soFar = 0;
-    while (true) {
-        ssize_t n = write(fd, data+soFar, dataLen-soFar);
-        if (n <= 0) {
-            LOGE("Error writing %ld bytes from zip file from %p: %s\n",
-                 dataLen-soFar, data+soFar, strerror(errno));
-            if (errno != EINTR) {
-              return false;
-            }
-        } else if (n > 0) {
-            soFar += n;
-            if (soFar == dataLen) return true;
-            if (soFar > dataLen) {
-                LOGE("write overrun?  (%ld bytes instead of %d)\n",
-                     soFar, dataLen);
-                return false;
-            }
-        }
-    }
-}
-
-/*
- * Uncompress "pEntry" in "pArchive" to "fd" at the current offset.
- */
-bool mzExtractZipEntryToFile(const ZipArchive *pArchive,
-    const ZipEntry *pEntry, int fd)
-{
-    bool ret = mzProcessZipEntryContents(pArchive, pEntry, writeProcessFunction,
-                                         (void*)fd);
-    if (!ret) {
-        LOGE("Can't extract entry to file.\n");
-        return false;
-    }
-    return true;
-}
-
-typedef struct {
-    unsigned char* buffer;
-    long len;
-} BufferExtractCookie;
-
-static bool bufferProcessFunction(const unsigned char *data, int dataLen,
-    void *cookie) {
-    BufferExtractCookie *bec = (BufferExtractCookie*)cookie;
-
-    memmove(bec->buffer, data, dataLen);
-    bec->buffer += dataLen;
-    bec->len -= dataLen;
-
-    return true;
-}
-
-/*
- * Uncompress "pEntry" in "pArchive" to buffer, which must be large
- * enough to hold mzGetZipEntryUncomplen(pEntry) bytes.
- */
-bool mzExtractZipEntryToBuffer(const ZipArchive *pArchive,
-    const ZipEntry *pEntry, unsigned char *buffer)
-{
-    BufferExtractCookie bec;
-    bec.buffer = buffer;
-    bec.len = mzGetZipEntryUncompLen(pEntry);
-
-    bool ret = mzProcessZipEntryContents(pArchive, pEntry,
-        bufferProcessFunction, (void*)&bec);
-    if (!ret || bec.len != 0) {
-        LOGE("Can't extract entry to memory buffer.\n");
-        return false;
-    }
-    return true;
-}
-
-
-/* Helper state to make path translation easier and less malloc-happy.
- */
-typedef struct {
-    const char *targetDir;
-    const char *zipDir;
-    char *buf;
-    int targetDirLen;
-    int zipDirLen;
-    int bufLen;
-} MzPathHelper;
-
-/* Given the values of targetDir and zipDir in the helper,
- * return the target filename of the provided entry.
- * The helper must be initialized first.
- */
-static const char *targetEntryPath(MzPathHelper *helper, ZipEntry *pEntry)
-{
-    int needLen;
-    bool firstTime = (helper->buf == NULL);
-
-    /* target file <-- targetDir + / + entry[zipDirLen:]
-     */
-    needLen = helper->targetDirLen + 1 +
-            pEntry->fileNameLen - helper->zipDirLen + 1;
-    if (needLen > helper->bufLen) {
-        char *newBuf;
-
-        needLen *= 2;
-        newBuf = (char *)realloc(helper->buf, needLen);
-        if (newBuf == NULL) {
-            return NULL;
-        }
-        helper->buf = newBuf;
-        helper->bufLen = needLen;
-    }
-
-    /* Every path will start with the target path and a slash.
-     */
-    if (firstTime) {
-        char *p = helper->buf;
-        memcpy(p, helper->targetDir, helper->targetDirLen);
-        p += helper->targetDirLen;
-        if (p == helper->buf || p[-1] != '/') {
-            helper->targetDirLen += 1;
-            *p++ = '/';
-        }
-    }
-
-    /* Replace the custom part of the path with the appropriate
-     * part of the entry's path.
-     */
-    char *epath = helper->buf + helper->targetDirLen;
-    memcpy(epath, pEntry->fileName + helper->zipDirLen,
-            pEntry->fileNameLen - helper->zipDirLen);
-    epath += pEntry->fileNameLen - helper->zipDirLen;
-    *epath = '\0';
-
-    return helper->buf;
-}
-
-/*
- * Inflate all entries under zipDir to the directory specified by
- * targetDir, which must exist and be a writable directory.
- *
- * The immediate children of zipDir will become the immediate
- * children of targetDir; e.g., if the archive contains the entries
- *
- *     a/b/c/one
- *     a/b/c/two
- *     a/b/c/d/three
- *
- * and mzExtractRecursive(a, "a/b/c", "/tmp") is called, the resulting
- * files will be
- *
- *     /tmp/one
- *     /tmp/two
- *     /tmp/d/three
- *
- * Returns true on success, false on failure.
- */
-bool mzExtractRecursive(const ZipArchive *pArchive,
-                        const char *zipDir, const char *targetDir,
-                        int flags, const struct utimbuf *timestamp,
-                        void (*callback)(const char *fn, void *), void *cookie,
-                        struct selabel_handle *sehnd)
-{
-    if (zipDir[0] == '/') {
-        LOGE("mzExtractRecursive(): zipDir must be a relative path.\n");
-        return false;
-    }
-    if (targetDir[0] != '/') {
-        LOGE("mzExtractRecursive(): targetDir must be an absolute path.\n");
-        return false;
-    }
-
-    unsigned int zipDirLen;
-    char *zpath;
-
-    zipDirLen = strlen(zipDir);
-    zpath = (char *)malloc(zipDirLen + 2);
-    if (zpath == NULL) {
-        LOGE("Can't allocate %d bytes for zip path\n", zipDirLen + 2);
-        return false;
-    }
-    /* If zipDir is empty, we'll extract the entire zip file.
-     * Otherwise, canonicalize the path.
-     */
-    if (zipDirLen > 0) {
-        /* Make sure there's (hopefully, exactly one) slash at the
-         * end of the path.  This way we don't need to worry about
-         * accidentally extracting "one/twothree" when a path like
-         * "one/two" is specified.
-         */
-        memcpy(zpath, zipDir, zipDirLen);
-        if (zpath[zipDirLen-1] != '/') {
-            zpath[zipDirLen++] = '/';
-        }
-    }
-    zpath[zipDirLen] = '\0';
-
-    /* Set up the helper structure that we'll use to assemble paths.
-     */
-    MzPathHelper helper;
-    helper.targetDir = targetDir;
-    helper.targetDirLen = strlen(helper.targetDir);
-    helper.zipDir = zpath;
-    helper.zipDirLen = strlen(helper.zipDir);
-    helper.buf = NULL;
-    helper.bufLen = 0;
-
-    /* Walk through the entries and extract anything whose path begins
-     * with zpath.
-//TODO: since the entries are sorted, binary search for the first match
-//      and stop after the first non-match.
-     */
-    unsigned int i;
-    bool seenMatch = false;
-    int ok = true;
-    int extractCount = 0;
-    for (i = 0; i < pArchive->numEntries; i++) {
-        ZipEntry *pEntry = pArchive->pEntries + i;
-        if (pEntry->fileNameLen < zipDirLen) {
-//TODO: look out for a single empty directory entry that matches zpath, but
-//      missing the trailing slash.  Most zip files seem to include
-//      the trailing slash, but I think it's legal to leave it off.
-//      e.g., zpath "a/b/", entry "a/b", with no children of the entry.
-            /* No chance of matching.
-             */
-#if SORT_ENTRIES
-            if (seenMatch) {
-                /* Since the entries are sorted, we can give up
-                 * on the first mismatch after the first match.
-                 */
-                break;
-            }
-#endif
-            continue;
-        }
-        /* If zpath is empty, this strncmp() will match everything,
-         * which is what we want.
-         */
-        if (strncmp(pEntry->fileName, zpath, zipDirLen) != 0) {
-#if SORT_ENTRIES
-            if (seenMatch) {
-                /* Since the entries are sorted, we can give up
-                 * on the first mismatch after the first match.
-                 */
-                break;
-            }
-#endif
-            continue;
-        }
-        /* This entry begins with zipDir, so we'll extract it.
-         */
-        seenMatch = true;
-
-        /* Find the target location of the entry.
-         */
-        const char *targetFile = targetEntryPath(&helper, pEntry);
-        if (targetFile == NULL) {
-            LOGE("Can't assemble target path for \"%.*s\"\n",
-                    pEntry->fileNameLen, pEntry->fileName);
-            ok = false;
-            break;
-        }
-
-        /* With DRY_RUN set, invoke the callback but don't do anything else.
-         */
-        if (flags & MZ_EXTRACT_DRY_RUN) {
-            if (callback != NULL) callback(targetFile, cookie);
-            continue;
-        }
-
-        /* Create the file or directory.
-         */
-#define UNZIP_DIRMODE 0755
-#define UNZIP_FILEMODE 0644
-        if (pEntry->fileName[pEntry->fileNameLen-1] == '/') {
-            if (!(flags & MZ_EXTRACT_FILES_ONLY)) {
-                int ret = dirCreateHierarchy(
-                        targetFile, UNZIP_DIRMODE, timestamp, false, sehnd);
-                if (ret != 0) {
-                    LOGE("Can't create containing directory for \"%s\": %s\n",
-                            targetFile, strerror(errno));
-                    ok = false;
-                    break;
-                }
-                LOGD("Extracted dir \"%s\"\n", targetFile);
-            }
-        } else {
-            /* This is not a directory.  First, make sure that
-             * the containing directory exists.
-             */
-            int ret = dirCreateHierarchy(
-                    targetFile, UNZIP_DIRMODE, timestamp, true, sehnd);
-            if (ret != 0) {
-                LOGE("Can't create containing directory for \"%s\": %s\n",
-                        targetFile, strerror(errno));
-                ok = false;
-                break;
-            }
-
-            /* With FILES_ONLY set, we need to ignore metadata entirely,
-             * so treat symlinks as regular files.
-             */
-            if (!(flags & MZ_EXTRACT_FILES_ONLY) && mzIsZipEntrySymlink(pEntry)) {
-                /* The entry is a symbolic link.
-                 * The relative target of the symlink is in the
-                 * data section of this entry.
-                 */
-                if (pEntry->uncompLen == 0) {
-                    LOGE("Symlink entry \"%s\" has no target\n",
-                            targetFile);
-                    ok = false;
-                    break;
-                }
-                char *linkTarget = malloc(pEntry->uncompLen + 1);
-                if (linkTarget == NULL) {
-                    ok = false;
-                    break;
-                }
-                ok = mzReadZipEntry(pArchive, pEntry, linkTarget,
-                        pEntry->uncompLen);
-                if (!ok) {
-                    LOGE("Can't read symlink target for \"%s\"\n",
-                            targetFile);
-                    free(linkTarget);
-                    break;
-                }
-                linkTarget[pEntry->uncompLen] = '\0';
-
-                /* Make the link.
-                 */
-                ret = symlink(linkTarget, targetFile);
-                if (ret != 0) {
-                    LOGE("Can't symlink \"%s\" to \"%s\": %s\n",
-                            targetFile, linkTarget, strerror(errno));
-                    free(linkTarget);
-                    ok = false;
-                    break;
-                }
-                LOGD("Extracted symlink \"%s\" -> \"%s\"\n",
-                        targetFile, linkTarget);
-                free(linkTarget);
-            } else {
-                /* The entry is a regular file.
-                 * Open the target for writing.
-                 */
-
-                char *secontext = NULL;
-
-                if (sehnd) {
-                    selabel_lookup(sehnd, &secontext, targetFile, UNZIP_FILEMODE);
-                    setfscreatecon(secontext);
-                }
-
-                int fd = creat(targetFile, UNZIP_FILEMODE);
-
-                if (secontext) {
-                    freecon(secontext);
-                    setfscreatecon(NULL);
-                }
-
-                if (fd < 0) {
-                    LOGE("Can't create target file \"%s\": %s\n",
-                            targetFile, strerror(errno));
-                    ok = false;
-                    break;
-                }
-
-                bool ok = mzExtractZipEntryToFile(pArchive, pEntry, fd);
-                close(fd);
-                if (!ok) {
-                    LOGE("Error extracting \"%s\"\n", targetFile);
-                    ok = false;
-                    break;
-                }
-
-                if (timestamp != NULL && utime(targetFile, timestamp)) {
-                    LOGE("Error touching \"%s\"\n", targetFile);
-                    ok = false;
-                    break;
-                }
-
-                LOGV("Extracted file \"%s\"\n", targetFile);
-                ++extractCount;
-            }
-        }
-
-        if (callback != NULL) callback(targetFile, cookie);
-    }
-
-    LOGD("Extracted %d file(s)\n", extractCount);
-
-    free(helper.buf);
-    free(zpath);
-
-    return ok;
-}