Initial Contribution

13 files changed, 3118 insertions, 0 deletions

diff --git a/minzip/Android.mk b/minzip/Android.mk
new file mode 100644
index 0000000..b1ee674
--- /dev/null
+++ b/minzip/Android.mk
@@ -0,0 +1,19 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+	Hash.c \
+	SysUtil.c \
+	DirUtil.c \
+	Inlines.c \
+	Zip.c
+
+LOCAL_C_INCLUDES += \
+	external/zlib \
+	external/safe-iop/include
+	
+LOCAL_MODULE := libminzip
+
+LOCAL_CFLAGS += -Wall
+
+include $(BUILD_STATIC_LIBRARY)
diff --git a/minzip/Bits.h b/minzip/Bits.h
new file mode 100644
index 0000000..f96e6c4
--- /dev/null
+++ b/minzip/Bits.h
@@ -0,0 +1,357 @@
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * Some handy functions for manipulating bits and bytes.
+ */
+#ifndef _MINZIP_BITS
+#define _MINZIP_BITS
+
+#include "inline_magic.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+/*
+ * Get 1 byte.  (Included to make the code more legible.)
+ */
+INLINE unsigned char get1(unsigned const char* pSrc)
+{
+    return *pSrc;
+}
+
+/*
+ * Get 2 big-endian bytes.
+ */
+INLINE unsigned short get2BE(unsigned char const* pSrc)
+{
+    unsigned short result;
+
+    result = *pSrc++ << 8;
+    result |= *pSrc++;
+
+    return result;
+}
+
+/*
+ * Get 4 big-endian bytes.
+ */
+INLINE unsigned int get4BE(unsigned char const* pSrc)
+{
+    unsigned int result;
+
+    result = *pSrc++ << 24;
+    result |= *pSrc++ << 16;
+    result |= *pSrc++ << 8;
+    result |= *pSrc++;
+
+    return result;
+}
+
+/*
+ * Get 8 big-endian bytes.
+ */
+INLINE unsigned long long get8BE(unsigned char const* pSrc)
+{
+    unsigned long long result;
+
+    result = (unsigned long long) *pSrc++ << 56;
+    result |= (unsigned long long) *pSrc++ << 48;
+    result |= (unsigned long long) *pSrc++ << 40;
+    result |= (unsigned long long) *pSrc++ << 32;
+    result |= (unsigned long long) *pSrc++ << 24;
+    result |= (unsigned long long) *pSrc++ << 16;
+    result |= (unsigned long long) *pSrc++ << 8;
+    result |= (unsigned long long) *pSrc++;
+
+    return result;
+}
+
+/*
+ * Get 2 little-endian bytes.
+ */
+INLINE unsigned short get2LE(unsigned char const* pSrc)
+{
+    unsigned short result;
+
+    result = *pSrc++;
+    result |= *pSrc++ << 8;
+
+    return result;
+}
+
+/*
+ * Get 4 little-endian bytes.
+ */
+INLINE unsigned int get4LE(unsigned char const* pSrc)
+{
+    unsigned int result;
+
+    result = *pSrc++;
+    result |= *pSrc++ << 8;
+    result |= *pSrc++ << 16;
+    result |= *pSrc++ << 24;
+
+    return result;
+}
+
+/*
+ * Get 8 little-endian bytes.
+ */
+INLINE unsigned long long get8LE(unsigned char const* pSrc)
+{
+    unsigned long long result;
+
+    result = (unsigned long long) *pSrc++;
+    result |= (unsigned long long) *pSrc++ << 8;
+    result |= (unsigned long long) *pSrc++ << 16;
+    result |= (unsigned long long) *pSrc++ << 24;
+    result |= (unsigned long long) *pSrc++ << 32;
+    result |= (unsigned long long) *pSrc++ << 40;
+    result |= (unsigned long long) *pSrc++ << 48;
+    result |= (unsigned long long) *pSrc++ << 56;
+
+    return result;
+}
+
+/*
+ * Grab 1 byte and advance the data pointer.
+ */
+INLINE unsigned char read1(unsigned const char** ppSrc)
+{
+    return *(*ppSrc)++;
+}
+
+/*
+ * Grab 2 big-endian bytes and advance the data pointer.
+ */
+INLINE unsigned short read2BE(unsigned char const** ppSrc)
+{
+    unsigned short result;
+
+    result = *(*ppSrc)++ << 8;
+    result |= *(*ppSrc)++;
+
+    return result;
+}
+
+/*
+ * Grab 4 big-endian bytes and advance the data pointer.
+ */
+INLINE unsigned int read4BE(unsigned char const** ppSrc)
+{
+    unsigned int result;
+
+    result = *(*ppSrc)++ << 24;
+    result |= *(*ppSrc)++ << 16;
+    result |= *(*ppSrc)++ << 8;
+    result |= *(*ppSrc)++;
+
+    return result;
+}
+
+/*
+ * Get 8 big-endian bytes.
+ */
+INLINE unsigned long long read8BE(unsigned char const** ppSrc)
+{
+    unsigned long long result;
+
+    result = (unsigned long long) *(*ppSrc)++ << 56;
+    result |= (unsigned long long) *(*ppSrc)++ << 48;
+    result |= (unsigned long long) *(*ppSrc)++ << 40;
+    result |= (unsigned long long) *(*ppSrc)++ << 32;
+    result |= (unsigned long long) *(*ppSrc)++ << 24;
+    result |= (unsigned long long) *(*ppSrc)++ << 16;
+    result |= (unsigned long long) *(*ppSrc)++ << 8;
+    result |= (unsigned long long) *(*ppSrc)++;
+
+    return result;
+}
+
+/*
+ * Grab 2 little-endian bytes and advance the data pointer.
+ */
+INLINE unsigned short read2LE(unsigned char const** ppSrc)
+{
+    unsigned short result;
+
+    result = *(*ppSrc)++;
+    result |= *(*ppSrc)++ << 8;
+
+    return result;
+}
+
+/*
+ * Grab 4 little-endian bytes and advance the data pointer.
+ */
+INLINE unsigned int read4LE(unsigned char const** ppSrc)
+{
+    unsigned int result;
+
+    result = *(*ppSrc)++;
+    result |= *(*ppSrc)++ << 8;
+    result |= *(*ppSrc)++ << 16;
+    result |= *(*ppSrc)++ << 24;
+
+    return result;
+}
+
+/*
+ * Get 8 little-endian bytes.
+ */
+INLINE unsigned long long read8LE(unsigned char const** ppSrc)
+{
+    unsigned long long result;
+
+    result = (unsigned long long) *(*ppSrc)++;
+    result |= (unsigned long long) *(*ppSrc)++ << 8;
+    result |= (unsigned long long) *(*ppSrc)++ << 16;
+    result |= (unsigned long long) *(*ppSrc)++ << 24;
+    result |= (unsigned long long) *(*ppSrc)++ << 32;
+    result |= (unsigned long long) *(*ppSrc)++ << 40;
+    result |= (unsigned long long) *(*ppSrc)++ << 48;
+    result |= (unsigned long long) *(*ppSrc)++ << 56;
+
+    return result;
+}
+
+/*
+ * Skip over a UTF-8 string.
+ */
+INLINE void skipUtf8String(unsigned char const** ppSrc)
+{
+    unsigned int length = read4BE(ppSrc);
+
+    (*ppSrc) += length;
+}
+
+/*
+ * Read a UTF-8 string into a fixed-size buffer, and null-terminate it.
+ *
+ * Returns the length of the original string.
+ */
+INLINE int readUtf8String(unsigned char const** ppSrc, char* buf, size_t bufLen)
+{
+    unsigned int length = read4BE(ppSrc);
+    size_t copyLen = (length < bufLen) ? length : bufLen-1;
+
+    memcpy(buf, *ppSrc, copyLen);
+    buf[copyLen] = '\0';
+
+    (*ppSrc) += length;
+    return length;
+}
+
+/*
+ * Read a UTF-8 string into newly-allocated storage, and null-terminate it.
+ *
+ * Returns the string and its length.  (The latter is probably unnecessary
+ * for the way we're using UTF8.)
+ */
+INLINE char* readNewUtf8String(unsigned char const** ppSrc, size_t* pLength)
+{
+    unsigned int length = read4BE(ppSrc);
+    char* buf;
+
+    buf = (char*) malloc(length+1);
+
+    memcpy(buf, *ppSrc, length);
+    buf[length] = '\0';
+
+    (*ppSrc) += length;
+
+    *pLength = length;
+    return buf;
+}
+
+
+/*
+ * Set 1 byte.  (Included to make the code more legible.)
+ */
+INLINE void set1(unsigned char* buf, unsigned char val)
+{
+    *buf = (unsigned char)(val);
+}
+
+/*
+ * Set 2 big-endian bytes.
+ */
+INLINE void set2BE(unsigned char* buf, unsigned short val)
+{
+    *buf++ = (unsigned char)(val >> 8);
+    *buf = (unsigned char)(val);
+}
+
+/*
+ * Set 4 big-endian bytes.
+ */
+INLINE void set4BE(unsigned char* buf, unsigned int val)
+{
+    *buf++ = (unsigned char)(val >> 24);
+    *buf++ = (unsigned char)(val >> 16);
+    *buf++ = (unsigned char)(val >> 8);
+    *buf = (unsigned char)(val);
+}
+
+/*
+ * Set 8 big-endian bytes.
+ */
+INLINE void set8BE(unsigned char* buf, unsigned long long val)
+{
+    *buf++ = (unsigned char)(val >> 56);
+    *buf++ = (unsigned char)(val >> 48);
+    *buf++ = (unsigned char)(val >> 40);
+    *buf++ = (unsigned char)(val >> 32);
+    *buf++ = (unsigned char)(val >> 24);
+    *buf++ = (unsigned char)(val >> 16);
+    *buf++ = (unsigned char)(val >> 8);
+    *buf = (unsigned char)(val);
+}
+
+/*
+ * Set 2 little-endian bytes.
+ */
+INLINE void set2LE(unsigned char* buf, unsigned short val)
+{
+    *buf++ = (unsigned char)(val);
+    *buf = (unsigned char)(val >> 8);
+}
+
+/*
+ * Set 4 little-endian bytes.
+ */
+INLINE void set4LE(unsigned char* buf, unsigned int val)
+{
+    *buf++ = (unsigned char)(val);
+    *buf++ = (unsigned char)(val >> 8);
+    *buf++ = (unsigned char)(val >> 16);
+    *buf = (unsigned char)(val >> 24);
+}
+
+/*
+ * Set 8 little-endian bytes.
+ */
+INLINE void set8LE(unsigned char* buf, unsigned long long val)
+{
+    *buf++ = (unsigned char)(val);
+    *buf++ = (unsigned char)(val >> 8);
+    *buf++ = (unsigned char)(val >> 16);
+    *buf++ = (unsigned char)(val >> 24);
+    *buf++ = (unsigned char)(val >> 32);
+    *buf++ = (unsigned char)(val >> 40);
+    *buf++ = (unsigned char)(val >> 48);
+    *buf = (unsigned char)(val >> 56);
+}
+
+/*
+ * Stuff a UTF-8 string into the buffer.
+ */
+INLINE void setUtf8String(unsigned char* buf, const unsigned char* str)
+{
+    unsigned int strLen = strlen((const char*)str);
+
+    set4BE(buf, strLen);
+    memcpy(buf + sizeof(unsigned int), str, strLen);
+}
+
+#endif /*_MINZIP_BITS*/
diff --git a/minzip/DirUtil.c b/minzip/DirUtil.c
new file mode 100644
index 0000000..20c89cd
--- /dev/null
+++ b/minzip/DirUtil.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <dirent.h>
+#include <limits.h>
+
+#include "DirUtil.h"
+
+typedef enum { DMISSING, DDIR, DILLEGAL } DirStatus;
+
+static DirStatus
+getPathDirStatus(const char *path)
+{
+    struct stat st;
+    int err;
+
+    err = stat(path, &st);
+    if (err == 0) {
+        /* Something's there; make sure it's a directory.
+         */
+        if (S_ISDIR(st.st_mode)) {
+            return DDIR;
+        }
+        errno = ENOTDIR;
+        return DILLEGAL;
+    } else if (errno != ENOENT) {
+        /* Something went wrong, or something in the path
+         * is bad.  Can't do anything in this situation.
+         */
+        return DILLEGAL;
+    }
+    return DMISSING;
+}
+
+int
+dirCreateHierarchy(const char *path, int mode,
+        const struct utimbuf *timestamp, bool stripFileName)
+{
+    DirStatus ds;
+
+    /* Check for an empty string before we bother
+     * making any syscalls.
+     */
+    if (path[0] == '\0') {
+        errno = ENOENT;
+        return -1;
+    }
+
+    /* Allocate a path that we can modify; stick a slash on
+     * the end to make things easier.
+     */
+    size_t pathLen = strlen(path);
+    char *cpath = (char *)malloc(pathLen + 2);
+    if (cpath == NULL) {
+        errno = ENOMEM;
+        return -1;
+    }
+    memcpy(cpath, path, pathLen);
+    if (stripFileName) {
+        /* Strip everything after the last slash.
+         */
+        char *c = cpath + pathLen - 1;
+        while (c != cpath && *c != '/') {
+            c--;
+        }
+        if (c == cpath) {
+//xxx test this path
+            /* No directory component.  Act like the path was empty.
+             */
+            errno = ENOENT;
+            free(cpath);
+            return -1;
+        }
+        c[1] = '\0';    // Terminate after the slash we found.
+    } else {
+        /* Make sure that the path ends in a slash.
+         */
+        cpath[pathLen] = '/';
+        cpath[pathLen + 1] = '\0';
+    }
+
+    /* See if it already exists.
+     */
+    ds = getPathDirStatus(cpath);
+    if (ds == DDIR) {
+        return 0;
+    } else if (ds == DILLEGAL) {
+        return -1;
+    }
+
+    /* Walk up the path from the root and make each level.
+     * If a directory already exists, no big deal.
+     */
+    char *p = cpath;
+    while (*p != '\0') {
+        /* Skip any slashes, watching out for the end of the string.
+         */
+        while (*p != '\0' && *p == '/') {
+            p++;
+        }
+        if (*p == '\0') {
+            break;
+        }
+
+        /* Find the end of the next path component.
+         * We know that we'll see a slash before the NUL,
+         * because we added it, above.
+         */
+        while (*p != '/') {
+            p++;
+        }
+        *p = '\0';
+
+        /* Check this part of the path and make a new directory
+         * if necessary.
+         */
+        ds = getPathDirStatus(cpath);
+        if (ds == DILLEGAL) {
+            /* Could happen if some other process/thread is
+             * messing with the filesystem.
+             */
+            free(cpath);
+            return -1;
+        } else if (ds == DMISSING) {
+            int err;
+
+            err = mkdir(cpath, mode);
+            if (err != 0) {
+                free(cpath);
+                return -1;
+            }
+            if (timestamp != NULL && utime(cpath, timestamp)) {
+                free(cpath);
+                return -1;
+            }
+        }
+        // else, this directory already exists.
+        
+        /* Repair the path and continue.
+         */
+        *p = '/';
+    }
+    free(cpath);
+
+    return 0;
+}
+
+int
+dirUnlinkHierarchy(const char *path)
+{
+    struct stat st;
+    DIR *dir;
+    struct dirent *de;
+    int fail = 0;
+
+    /* is it a file or directory? */
+    if (lstat(path, &st) < 0) {
+        return -1;
+    }
+
+    /* a file, so unlink it */
+    if (!S_ISDIR(st.st_mode)) {
+        return unlink(path);
+    }
+
+    /* a directory, so open handle */
+    dir = opendir(path);
+    if (dir == NULL) {
+        return -1;
+    }
+
+    /* recurse over components */
+    errno = 0;
+    while ((de = readdir(dir)) != NULL) {
+//TODO: don't blow the stack
+        char dn[PATH_MAX];
+        if (!strcmp(de->d_name, "..") || !strcmp(de->d_name, ".")) {
+            continue;
+        }
+        snprintf(dn, sizeof(dn), "%s/%s", path, de->d_name);
+        if (dirUnlinkHierarchy(dn) < 0) {
+            fail = 1;
+            break;
+        }
+        errno = 0;
+    }
+    /* in case readdir or unlink_recursive failed */
+    if (fail || errno < 0) {
+        int save = errno;
+        closedir(dir);
+        errno = save;
+        return -1;
+    }
+
+    /* close directory handle */
+    if (closedir(dir) < 0) {
+        return -1;
+    }
+
+    /* delete target directory */
+    return rmdir(path);
+}
+
+int
+dirSetHierarchyPermissions(const char *path,
+        int uid, int gid, int dirMode, int fileMode)
+{
+    struct stat st;
+    if (lstat(path, &st)) {
+        return -1;
+    }
+
+    /* ignore symlinks */
+    if (S_ISLNK(st.st_mode)) {
+        return 0;
+    }
+
+    /* directories and files get different permissions */
+    if (chown(path, uid, gid) ||
+        chmod(path, S_ISDIR(st.st_mode) ? dirMode : fileMode)) {
+        return -1;
+    }
+
+    /* recurse over directory components */
+    if (S_ISDIR(st.st_mode)) {
+        DIR *dir = opendir(path);
+        if (dir == NULL) {
+            return -1;
+        }
+
+        errno = 0;
+        const struct dirent *de;
+        while (errno == 0 && (de = readdir(dir)) != NULL) {
+            if (!strcmp(de->d_name, "..") || !strcmp(de->d_name, ".")) {
+                continue;
+            }
+
+            char dn[PATH_MAX];
+            snprintf(dn, sizeof(dn), "%s/%s", path, de->d_name);
+            if (!dirSetHierarchyPermissions(dn, uid, gid, dirMode, fileMode)) {
+                errno = 0;
+            } else if (errno == 0) {
+                errno = -1;
+            }
+        }
+
+        if (errno != 0) {
+            int save = errno;
+            closedir(dir);
+            errno = save;
+            return -1;
+        }
+
+        if (closedir(dir)) {
+            return -1;
+        }
+    }
+
+    return 0;
+}
diff --git a/minzip/DirUtil.h b/minzip/DirUtil.h
new file mode 100644
index 0000000..5d881f5
--- /dev/null
+++ b/minzip/DirUtil.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINZIP_DIRUTIL_H_
+#define MINZIP_DIRUTIL_H_
+
+#include <stdbool.h>
+#include <utime.h>
+
+/* Like "mkdir -p", try to guarantee that all directories
+ * specified in path are present, creating as many directories
+ * as necessary.  The specified mode is passed to all mkdir
+ * calls;  no modifications are made to umask.
+ *
+ * If stripFileName is set, everything after the final '/'
+ * is stripped before creating the directory hierarchy.
+ *
+ * If timestamp is non-NULL, new directories will be timestamped accordingly.
+ *
+ * Returns 0 on success; returns -1 (and sets errno) on failure
+ * (usually if some element of path is not a directory).
+ */
+int dirCreateHierarchy(const char *path, int mode,
+        const struct utimbuf *timestamp, bool stripFileName);
+
+/* rm -rf <path>
+ */
+int dirUnlinkHierarchy(const char *path);
+
+/* chown -R <uid>:<gid> <path>
+ * chmod -R <mode> <path>
+ *
+ * Sets directories to <dirMode> and files to <fileMode>.  Skips symlinks.
+ */
+int dirSetHierarchyPermissions(const char *path,
+         int uid, int gid, int dirMode, int fileMode);
+
+#endif  // MINZIP_DIRUTIL_H_
diff --git a/minzip/Hash.c b/minzip/Hash.c
new file mode 100644
index 0000000..8c6ca9b
--- /dev/null
+++ b/minzip/Hash.c
@@ -0,0 +1,390 @@
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * Hash table.  The dominant calls are add and lookup, with removals
+ * happening very infrequently.  We use probing, and don't worry much
+ * about tombstone removal.
+ */
+#include <stdlib.h>
+#include <assert.h>
+
+#define LOG_TAG "minzip"
+#include "Log.h"
+#include "Hash.h"
+
+/* table load factor, i.e. how full can it get before we resize */
+//#define LOAD_NUMER  3       // 75%
+//#define LOAD_DENOM  4
+#define LOAD_NUMER  5       // 62.5%
+#define LOAD_DENOM  8
+//#define LOAD_NUMER  1       // 50%
+//#define LOAD_DENOM  2
+
+/*
+ * Compute the capacity needed for a table to hold "size" elements.
+ */
+size_t mzHashSize(size_t size) {
+    return (size * LOAD_DENOM) / LOAD_NUMER +1;
+}
+
+/*
+ * Round up to the next highest power of 2.
+ *
+ * Found on http://graphics.stanford.edu/~seander/bithacks.html.
+ */
+unsigned int roundUpPower2(unsigned int val)
+{
+    val--;
+    val |= val >> 1;
+    val |= val >> 2;
+    val |= val >> 4;
+    val |= val >> 8;
+    val |= val >> 16;
+    val++;
+
+    return val;
+}
+
+/*
+ * Create and initialize a hash table.
+ */
+HashTable* mzHashTableCreate(size_t initialSize, HashFreeFunc freeFunc)
+{
+    HashTable* pHashTable;
+
+    assert(initialSize > 0);
+
+    pHashTable = (HashTable*) malloc(sizeof(*pHashTable));
+    if (pHashTable == NULL)
+        return NULL;
+
+    pHashTable->tableSize = roundUpPower2(initialSize);
+    pHashTable->numEntries = pHashTable->numDeadEntries = 0;
+    pHashTable->freeFunc = freeFunc;
+    pHashTable->pEntries =
+        (HashEntry*) calloc((size_t)pHashTable->tableSize, sizeof(HashTable));
+    if (pHashTable->pEntries == NULL) {
+        free(pHashTable);
+        return NULL;
+    }
+
+    return pHashTable;
+}
+
+/*
+ * Clear out all entries.
+ */
+void mzHashTableClear(HashTable* pHashTable)
+{
+    HashEntry* pEnt;
+    int i;
+
+    pEnt = pHashTable->pEntries;
+    for (i = 0; i < pHashTable->tableSize; i++, pEnt++) {
+        if (pEnt->data == HASH_TOMBSTONE) {
+            // nuke entry
+            pEnt->data = NULL;
+        } else if (pEnt->data != NULL) {
+            // call free func then nuke entry
+            if (pHashTable->freeFunc != NULL)
+                (*pHashTable->freeFunc)(pEnt->data);
+            pEnt->data = NULL;
+        }
+    }
+
+    pHashTable->numEntries = 0;
+    pHashTable->numDeadEntries = 0;
+}
+
+/*
+ * Free the table.
+ */
+void mzHashTableFree(HashTable* pHashTable)
+{
+    if (pHashTable == NULL)
+        return;
+    mzHashTableClear(pHashTable);
+    free(pHashTable->pEntries);
+    free(pHashTable);
+}
+
+#ifndef NDEBUG
+/*
+ * Count up the number of tombstone entries in the hash table.
+ */
+static int countTombStones(HashTable* pHashTable)
+{
+    int i, count;
+
+    for (count = i = 0; i < pHashTable->tableSize; i++) {
+        if (pHashTable->pEntries[i].data == HASH_TOMBSTONE)
+            count++;
+    }
+    return count;
+}
+#endif
+
+/*
+ * Resize a hash table.  We do this when adding an entry increased the
+ * size of the table beyond its comfy limit.
+ *
+ * This essentially requires re-inserting all elements into the new storage.
+ *
+ * If multiple threads can access the hash table, the table's lock should
+ * have been grabbed before issuing the "lookup+add" call that led to the
+ * resize, so we don't have a synchronization problem here.
+ */
+static bool resizeHash(HashTable* pHashTable, int newSize)
+{
+    HashEntry* pNewEntries;
+    int i;
+
+    assert(countTombStones(pHashTable) == pHashTable->numDeadEntries);
+    //LOGI("before: dead=%d\n", pHashTable->numDeadEntries);
+
+    pNewEntries = (HashEntry*) calloc(newSize, sizeof(HashTable));
+    if (pNewEntries == NULL)
+        return false;
+
+    for (i = 0; i < pHashTable->tableSize; i++) {
+        void* data = pHashTable->pEntries[i].data;
+        if (data != NULL && data != HASH_TOMBSTONE) {
+            int hashValue = pHashTable->pEntries[i].hashValue;
+            int newIdx;
+
+            /* probe for new spot, wrapping around */
+            newIdx = hashValue & (newSize-1);
+            while (pNewEntries[newIdx].data != NULL)
+                newIdx = (newIdx + 1) & (newSize-1);
+
+            pNewEntries[newIdx].hashValue = hashValue;
+            pNewEntries[newIdx].data = data;
+        }
+    }
+
+    free(pHashTable->pEntries);
+    pHashTable->pEntries = pNewEntries;
+    pHashTable->tableSize = newSize;
+    pHashTable->numDeadEntries = 0;
+
+    assert(countTombStones(pHashTable) == 0);
+    return true;
+}
+
+/*
+ * Look up an entry.
+ *
+ * We probe on collisions, wrapping around the table.
+ */
+void* mzHashTableLookup(HashTable* pHashTable, unsigned int itemHash, void* item,
+    HashCompareFunc cmpFunc, bool doAdd)
+{
+    HashEntry* pEntry;
+    HashEntry* pEnd;
+    void* result = NULL;
+
+    assert(pHashTable->tableSize > 0);
+    assert(item != HASH_TOMBSTONE);
+    assert(item != NULL);
+
+    /* jump to the first entry and probe for a match */
+    pEntry = &pHashTable->pEntries[itemHash & (pHashTable->tableSize-1)];
+    pEnd = &pHashTable->pEntries[pHashTable->tableSize];
+    while (pEntry->data != NULL) {
+        if (pEntry->data != HASH_TOMBSTONE &&
+            pEntry->hashValue == itemHash &&
+            (*cmpFunc)(pEntry->data, item) == 0)
+        {
+            /* match */
+            //LOGD("+++ match on entry %d\n", pEntry - pHashTable->pEntries);
+            break;
+        }
+
+        pEntry++;
+        if (pEntry == pEnd) {     /* wrap around to start */
+            if (pHashTable->tableSize == 1)
+                break;      /* edge case - single-entry table */
+            pEntry = pHashTable->pEntries;
+        }
+
+        //LOGI("+++ look probing %d...\n", pEntry - pHashTable->pEntries);
+    }
+
+    if (pEntry->data == NULL) {
+        if (doAdd) {
+            pEntry->hashValue = itemHash;
+            pEntry->data = item;
+            pHashTable->numEntries++;
+
+            /*
+             * We've added an entry.  See if this brings us too close to full.
+             */
+            if ((pHashTable->numEntries+pHashTable->numDeadEntries) * LOAD_DENOM
+                > pHashTable->tableSize * LOAD_NUMER)
+            {
+                if (!resizeHash(pHashTable, pHashTable->tableSize * 2)) {
+                    /* don't really have a way to indicate failure */
+                    LOGE("Dalvik hash resize failure\n");
+                    abort();
+                }
+                /* note "pEntry" is now invalid */
+            } else {
+                //LOGW("okay %d/%d/%d\n",
+                //    pHashTable->numEntries, pHashTable->tableSize,
+                //    (pHashTable->tableSize * LOAD_NUMER) / LOAD_DENOM);
+            }
+
+            /* full table is bad -- search for nonexistent never halts */
+            assert(pHashTable->numEntries < pHashTable->tableSize);
+            result = item;
+        } else {
+            assert(result == NULL);
+        }
+    } else {
+        result = pEntry->data;
+    }
+
+    return result;
+}
+
+/*
+ * Remove an entry from the table.
+ *
+ * Does NOT invoke the "free" function on the item.
+ */
+bool mzHashTableRemove(HashTable* pHashTable, unsigned int itemHash, void* item)
+{
+    HashEntry* pEntry;
+    HashEntry* pEnd;
+
+    assert(pHashTable->tableSize > 0);
+
+    /* jump to the first entry and probe for a match */
+    pEntry = &pHashTable->pEntries[itemHash & (pHashTable->tableSize-1)];
+    pEnd = &pHashTable->pEntries[pHashTable->tableSize];
+    while (pEntry->data != NULL) {
+        if (pEntry->data == item) {
+            //LOGI("+++ stepping on entry %d\n", pEntry - pHashTable->pEntries);
+            pEntry->data = HASH_TOMBSTONE;
+            pHashTable->numEntries--;
+            pHashTable->numDeadEntries++;
+            return true;
+        }
+
+        pEntry++;
+        if (pEntry == pEnd) {     /* wrap around to start */
+            if (pHashTable->tableSize == 1)
+                break;      /* edge case - single-entry table */
+            pEntry = pHashTable->pEntries;
+        }
+
+        //LOGI("+++ del probing %d...\n", pEntry - pHashTable->pEntries);
+    }
+
+    return false;
+}
+
+/*
+ * Execute a function on every entry in the hash table.
+ *
+ * If "func" returns a nonzero value, terminate early and return the value.
+ */
+int mzHashForeach(HashTable* pHashTable, HashForeachFunc func, void* arg)
+{
+    int i, val;
+
+    for (i = 0; i < pHashTable->tableSize; i++) {
+        HashEntry* pEnt = &pHashTable->pEntries[i];
+
+        if (pEnt->data != NULL && pEnt->data != HASH_TOMBSTONE) {
+            val = (*func)(pEnt->data, arg);
+            if (val != 0)
+                return val;
+        }
+    }
+
+    return 0;
+}
+
+
+/*
+ * Look up an entry, counting the number of times we have to probe.
+ *
+ * Returns -1 if the entry wasn't found.
+ */
+int countProbes(HashTable* pHashTable, unsigned int itemHash, const void* item,
+    HashCompareFunc cmpFunc)
+{
+    HashEntry* pEntry;
+    HashEntry* pEnd;
+    int count = 0;
+
+    assert(pHashTable->tableSize > 0);
+    assert(item != HASH_TOMBSTONE);
+    assert(item != NULL);
+
+    /* jump to the first entry and probe for a match */
+    pEntry = &pHashTable->pEntries[itemHash & (pHashTable->tableSize-1)];
+    pEnd = &pHashTable->pEntries[pHashTable->tableSize];
+    while (pEntry->data != NULL) {
+        if (pEntry->data != HASH_TOMBSTONE &&
+            pEntry->hashValue == itemHash &&
+            (*cmpFunc)(pEntry->data, item) == 0)
+        {
+            /* match */
+            break;
+        }
+
+        pEntry++;
+        if (pEntry == pEnd) {     /* wrap around to start */
+            if (pHashTable->tableSize == 1)
+                break;      /* edge case - single-entry table */
+            pEntry = pHashTable->pEntries;
+        }
+
+        count++;
+    }
+    if (pEntry->data == NULL)
+        return -1;
+
+    return count;
+}
+
+/*
+ * Evaluate the amount of probing required for the specified hash table.
+ *
+ * We do this by running through all entries in the hash table, computing
+ * the hash value and then doing a lookup.
+ *
+ * The caller should lock the table before calling here.
+ */
+void mzHashTableProbeCount(HashTable* pHashTable, HashCalcFunc calcFunc,
+    HashCompareFunc cmpFunc)
+{
+    int numEntries, minProbe, maxProbe, totalProbe;
+    HashIter iter;
+
+    numEntries = maxProbe = totalProbe = 0;
+    minProbe = 65536*32767;
+
+    for (mzHashIterBegin(pHashTable, &iter); !mzHashIterDone(&iter);
+        mzHashIterNext(&iter))
+    {
+        const void* data = (const void*)mzHashIterData(&iter);
+        int count;
+            
+        count = countProbes(pHashTable, (*calcFunc)(data), data, cmpFunc);
+
+        numEntries++;
+
+        if (count < minProbe)
+            minProbe = count;
+        if (count > maxProbe)
+            maxProbe = count;
+        totalProbe += count;
+    }
+
+    LOGI("Probe: min=%d max=%d, total=%d in %d (%d), avg=%.3f\n",
+        minProbe, maxProbe, totalProbe, numEntries, pHashTable->tableSize,
+        (float) totalProbe / (float) numEntries);
+}
diff --git a/minzip/Hash.h b/minzip/Hash.h
new file mode 100644
index 0000000..8194537
--- /dev/null
+++ b/minzip/Hash.h
@@ -0,0 +1,186 @@
+/*
+ * Copyright 2007 The Android Open Source Project
+ *
+ * General purpose hash table, used for finding classes, methods, etc.
+ *
+ * When the number of elements reaches 3/4 of the table's capacity, the
+ * table will be resized.
+ */
+#ifndef _MINZIP_HASH
+#define _MINZIP_HASH
+
+#include "inline_magic.h"
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <assert.h>
+
+/* compute the hash of an item with a specific type */
+typedef unsigned int (*HashCompute)(const void* item);
+
+/*
+ * Compare a hash entry with a "loose" item after their hash values match.
+ * Returns { <0, 0, >0 } depending on ordering of items (same semantics
+ * as strcmp()).
+ */
+typedef int (*HashCompareFunc)(const void* tableItem, const void* looseItem);
+
+/*
+ * This function will be used to free entries in the table.  This can be
+ * NULL if no free is required, free(), or a custom function.
+ */
+typedef void (*HashFreeFunc)(void* ptr);
+
+/*
+ * Used by mzHashForeach().
+ */
+typedef int (*HashForeachFunc)(void* data, void* arg);
+
+/*
+ * One entry in the hash table.  "data" values are expected to be (or have
+ * the same characteristics as) valid pointers.  In particular, a NULL
+ * value for "data" indicates an empty slot, and HASH_TOMBSTONE indicates
+ * a no-longer-used slot that must be stepped over during probing.
+ *
+ * Attempting to add a NULL or tombstone value is an error.
+ *
+ * When an entry is released, we will call (HashFreeFunc)(entry->data).
+ */
+typedef struct HashEntry {
+    unsigned int hashValue;
+    void* data;
+} HashEntry;
+
+#define HASH_TOMBSTONE ((void*) 0xcbcacccd)     // invalid ptr value
+
+/*
+ * Expandable hash table.
+ *
+ * This structure should be considered opaque.
+ */
+typedef struct HashTable {
+    int         tableSize;          /* must be power of 2 */
+    int         numEntries;         /* current #of "live" entries */
+    int         numDeadEntries;     /* current #of tombstone entries */
+    HashEntry*  pEntries;           /* array on heap */
+    HashFreeFunc freeFunc;
+} HashTable;
+
+/*
+ * Create and initialize a HashTable structure, using "initialSize" as
+ * a basis for the initial capacity of the table.  (The actual initial
+ * table size may be adjusted upward.)  If you know exactly how many
+ * elements the table will hold, pass the result from mzHashSize() in.)
+ *
+ * Returns "false" if unable to allocate the table.
+ */
+HashTable* mzHashTableCreate(size_t initialSize, HashFreeFunc freeFunc);
+
+/*
+ * Compute the capacity needed for a table to hold "size" elements.  Use
+ * this when you know ahead of time how many elements the table will hold.
+ * Pass this value into mzHashTableCreate() to ensure that you can add
+ * all elements without needing to reallocate the table.
+ */
+size_t mzHashSize(size_t size);
+
+/*
+ * Clear out a hash table, freeing the contents of any used entries.
+ */
+void mzHashTableClear(HashTable* pHashTable);
+
+/*
+ * Free a hash table.
+ */
+void mzHashTableFree(HashTable* pHashTable);
+
+/*
+ * Get #of entries in hash table.
+ */
+INLINE int mzHashTableNumEntries(HashTable* pHashTable) {
+    return pHashTable->numEntries;
+}
+
+/*
+ * Get total size of hash table (for memory usage calculations).
+ */
+INLINE int mzHashTableMemUsage(HashTable* pHashTable) {
+    return sizeof(HashTable) + pHashTable->tableSize * sizeof(HashEntry);
+}
+
+/*
+ * Look up an entry in the table, possibly adding it if it's not there.
+ *
+ * If "item" is not found, and "doAdd" is false, NULL is returned.
+ * Otherwise, a pointer to the found or added item is returned.  (You can
+ * tell the difference by seeing if return value == item.)
+ *
+ * An "add" operation may cause the entire table to be reallocated.
+ */
+void* mzHashTableLookup(HashTable* pHashTable, unsigned int itemHash, void* item,
+    HashCompareFunc cmpFunc, bool doAdd);
+
+/*
+ * Remove an item from the hash table, given its "data" pointer.  Does not
+ * invoke the "free" function; just detaches it from the table.
+ */
+bool mzHashTableRemove(HashTable* pHashTable, unsigned int hash, void* item);
+
+/*
+ * Execute "func" on every entry in the hash table.
+ *
+ * If "func" returns a nonzero value, terminate early and return the value.
+ */
+int mzHashForeach(HashTable* pHashTable, HashForeachFunc func, void* arg);
+
+/*
+ * An alternative to mzHashForeach(), using an iterator.
+ *
+ * Use like this:
+ *   HashIter iter;
+ *   for (mzHashIterBegin(hashTable, &iter); !mzHashIterDone(&iter);
+ *       mzHashIterNext(&iter))
+ *   {
+ *       MyData* data = (MyData*)mzHashIterData(&iter);
+ *   }
+ */
+typedef struct HashIter {
+    void*       data;
+    HashTable*  pHashTable;
+    int         idx;
+} HashIter;
+INLINE void mzHashIterNext(HashIter* pIter) {
+    int i = pIter->idx +1;
+    int lim = pIter->pHashTable->tableSize;
+    for ( ; i < lim; i++) {
+        void* data = pIter->pHashTable->pEntries[i].data;
+        if (data != NULL && data != HASH_TOMBSTONE)
+            break;
+    }
+    pIter->idx = i;
+}
+INLINE void mzHashIterBegin(HashTable* pHashTable, HashIter* pIter) {
+    pIter->pHashTable = pHashTable;
+    pIter->idx = -1;
+    mzHashIterNext(pIter);
+}
+INLINE bool mzHashIterDone(HashIter* pIter) {
+    return (pIter->idx >= pIter->pHashTable->tableSize);
+}
+INLINE void* mzHashIterData(HashIter* pIter) {
+    assert(pIter->idx >= 0 && pIter->idx < pIter->pHashTable->tableSize);
+    return pIter->pHashTable->pEntries[pIter->idx].data;
+}
+
+
+/*
+ * Evaluate hash table performance by examining the number of times we
+ * have to probe for an entry.
+ *
+ * The caller should lock the table beforehand.
+ */
+typedef unsigned int (*HashCalcFunc)(const void* item);
+void mzHashTableProbeCount(HashTable* pHashTable, HashCalcFunc calcFunc,
+    HashCompareFunc cmpFunc);
+
+#endif /*_MINZIP_HASH*/
diff --git a/minzip/Inlines.c b/minzip/Inlines.c
new file mode 100644
index 0000000..91f8775
--- /dev/null
+++ b/minzip/Inlines.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Make sure that non-inlined versions of INLINED-marked functions
+ * exist so that debug builds (which don't generally do inlining)
+ * don't break.
+ */
+#define MINZIP_GENERATE_INLINES 1
+#include "Bits.h"
+#include "Hash.h"
+#include "SysUtil.h"
+#include "Zip.h"
diff --git a/minzip/Log.h b/minzip/Log.h
new file mode 100644
index 0000000..36e62f5
--- /dev/null
+++ b/minzip/Log.h
@@ -0,0 +1,207 @@
+//
+// Copyright 2005 The Android Open Source Project
+//
+// C/C++ logging functions.  See the logging documentation for API details.
+//
+// We'd like these to be available from C code (in case we import some from
+// somewhere), so this has a C interface.
+//
+// The output will be correct when the log file is shared between multiple
+// threads and/or multiple processes so long as the operating system
+// supports O_APPEND.  These calls have mutex-protected data structures
+// and so are NOT reentrant.  Do not use LOG in a signal handler.
+//
+#ifndef _MINZIP_LOG_H
+#define _MINZIP_LOG_H
+
+#include <stdio.h>
+
+// ---------------------------------------------------------------------
+
+/*
+ * Normally we strip LOGV (VERBOSE messages) from release builds.
+ * You can modify this (for example with "#define LOG_NDEBUG 0"
+ * at the top of your source file) to change that behavior.
+ */
+#ifndef LOG_NDEBUG
+#ifdef NDEBUG
+#define LOG_NDEBUG 1
+#else
+#define LOG_NDEBUG 0
+#endif
+#endif
+
+/*
+ * This is the local tag used for the following simplified
+ * logging macros.  You can change this preprocessor definition
+ * before using the other macros to change the tag.
+ */
+#ifndef LOG_TAG
+#define LOG_TAG NULL
+#endif
+
+// ---------------------------------------------------------------------
+
+/*
+ * Simplified macro to send a verbose log message using the current LOG_TAG.
+ */
+#ifndef LOGV
+#if LOG_NDEBUG
+#define LOGV(...)   ((void)0)
+#else
+#define LOGV(...) ((void)LOG(LOG_VERBOSE, LOG_TAG, __VA_ARGS__))
+#endif
+#endif
+
+#define CONDITION(cond)     (__builtin_expect((cond)!=0, 0))
+
+#ifndef LOGV_IF
+#if LOG_NDEBUG
+#define LOGV_IF(cond, ...)   ((void)0)
+#else
+#define LOGV_IF(cond, ...) \
+    ( (CONDITION(cond)) \
+    ? ((void)LOG(LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) \
+    : (void)0 )
+#endif
+#endif
+
+#define LOGVV LOGV
+#define LOGVV_IF LOGV_IF
+
+/*
+ * Simplified macro to send a debug log message using the current LOG_TAG.
+ */
+#ifndef LOGD
+#define LOGD(...) ((void)LOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__))
+#endif
+
+#ifndef LOGD_IF
+#define LOGD_IF(cond, ...) \
+    ( (CONDITION(cond)) \
+    ? ((void)LOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__)) \
+    : (void)0 )
+#endif
+
+/*
+ * Simplified macro to send an info log message using the current LOG_TAG.
+ */
+#ifndef LOGI
+#define LOGI(...) ((void)LOG(LOG_INFO, LOG_TAG, __VA_ARGS__))
+#endif
+
+#ifndef LOGI_IF
+#define LOGI_IF(cond, ...) \
+    ( (CONDITION(cond)) \
+    ? ((void)LOG(LOG_INFO, LOG_TAG, __VA_ARGS__)) \
+    : (void)0 )
+#endif
+
+/*
+ * Simplified macro to send a warning log message using the current LOG_TAG.
+ */
+#ifndef LOGW
+#define LOGW(...) ((void)LOG(LOG_WARN, LOG_TAG, __VA_ARGS__))
+#endif
+
+#ifndef LOGW_IF
+#define LOGW_IF(cond, ...) \
+    ( (CONDITION(cond)) \
+    ? ((void)LOG(LOG_WARN, LOG_TAG, __VA_ARGS__)) \
+    : (void)0 )
+#endif
+
+/*
+ * Simplified macro to send an error log message using the current LOG_TAG.
+ */
+#ifndef LOGE
+#define LOGE(...) ((void)LOG(LOG_ERROR, LOG_TAG, __VA_ARGS__))
+#endif
+
+#ifndef LOGE_IF
+#define LOGE_IF(cond, ...) \
+    ( (CONDITION(cond)) \
+    ? ((void)LOG(LOG_ERROR, LOG_TAG, __VA_ARGS__)) \
+    : (void)0 )
+#endif
+
+
+/*
+ * Conditional based on whether the current LOG_TAG is enabled at
+ * verbose priority.
+ */
+#ifndef IF_LOGV
+#if LOG_NDEBUG
+#define IF_LOGV() if (false)
+#else
+#define IF_LOGV() IF_LOG(LOG_VERBOSE, LOG_TAG)
+#endif
+#endif
+
+/*
+ * Conditional based on whether the current LOG_TAG is enabled at
+ * debug priority.
+ */
+#ifndef IF_LOGD
+#define IF_LOGD() IF_LOG(LOG_DEBUG, LOG_TAG)
+#endif
+
+/*
+ * Conditional based on whether the current LOG_TAG is enabled at
+ * info priority.
+ */
+#ifndef IF_LOGI
+#define IF_LOGI() IF_LOG(LOG_INFO, LOG_TAG)
+#endif
+
+/*
+ * Conditional based on whether the current LOG_TAG is enabled at
+ * warn priority.
+ */
+#ifndef IF_LOGW
+#define IF_LOGW() IF_LOG(LOG_WARN, LOG_TAG)
+#endif
+
+/*
+ * Conditional based on whether the current LOG_TAG is enabled at
+ * error priority.
+ */
+#ifndef IF_LOGE
+#define IF_LOGE() IF_LOG(LOG_ERROR, LOG_TAG)
+#endif
+
+// ---------------------------------------------------------------------
+
+/*
+ * Basic log message macro.
+ *
+ * Example:
+ *  LOG(LOG_WARN, NULL, "Failed with error %d", errno);
+ *
+ * The second argument may be NULL or "" to indicate the "global" tag.
+ *
+ * Non-gcc probably won't have __FUNCTION__.  It's not vital.  gcc also
+ * offers __PRETTY_FUNCTION__, which is rather more than we need.
+ */
+#ifndef LOG
+#define LOG(priority, tag, ...) \
+    LOG_PRI(ANDROID_##priority, tag, __VA_ARGS__)
+#endif
+
+/*
+ * Log macro that allows you to specify a number for the priority.
+ */
+#ifndef LOG_PRI
+#define LOG_PRI(priority, tag, ...) \
+    printf(tag ": " __VA_ARGS__)
+#endif
+
+/*
+ * Conditional given a desired logging priority and tag.
+ */
+#ifndef IF_LOG
+#define IF_LOG(priority, tag) \
+    if (1)
+#endif
+
+#endif // _MINZIP_LOG_H
diff --git a/minzip/SysUtil.c b/minzip/SysUtil.c
new file mode 100644
index 0000000..49a2522
--- /dev/null
+++ b/minzip/SysUtil.c
@@ -0,0 +1,212 @@
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * System utilities.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <limits.h>
+#include <errno.h>
+#include <assert.h>
+
+#define LOG_TAG "minzip"
+#include "Log.h"
+#include "SysUtil.h"
+
+/*
+ * Having trouble finding a portable way to get this.  sysconf(_SC_PAGE_SIZE)
+ * seems appropriate, but we don't have that on the device.  Some systems
+ * have getpagesize(2), though the linux man page has some odd cautions.
+ */
+#define DEFAULT_PAGE_SIZE   4096
+
+
+/*
+ * Create an anonymous shared memory segment large enough to hold "length"
+ * bytes.  The actual segment may be larger because mmap() operates on
+ * page boundaries (usually 4K).
+ */
+static void* sysCreateAnonShmem(size_t length)
+{
+    void* ptr;
+
+    ptr = mmap(NULL, length, PROT_READ | PROT_WRITE,
+            MAP_SHARED | MAP_ANON, -1, 0);
+    if (ptr == MAP_FAILED) {
+        LOGW("mmap(%d, RW, SHARED|ANON) failed: %s\n", (int) length,
+            strerror(errno));
+        return NULL;
+    }
+
+    return ptr;
+}
+
+static int getFileStartAndLength(int fd, off_t *start_, size_t *length_)
+{
+    off_t start, end;
+    size_t length;
+
+    assert(start_ != NULL);
+    assert(length_ != NULL);
+
+    start = lseek(fd, 0L, SEEK_CUR);
+    end = lseek(fd, 0L, SEEK_END);
+    (void) lseek(fd, start, SEEK_SET);
+
+    if (start == (off_t) -1 || end == (off_t) -1) {
+        LOGE("could not determine length of file\n");
+        return -1;
+    }
+
+    length = end - start;
+    if (length == 0) {
+        LOGE("file is empty\n");
+        return -1;
+    }
+
+    *start_ = start;
+    *length_ = length;
+
+    return 0;
+}
+
+/*
+ * Pull the contents of a file into an new shared memory segment.  We grab
+ * everything from fd's current offset on.
+ *
+ * We need to know the length ahead of time so we can allocate a segment
+ * of sufficient size.
+ */
+int sysLoadFileInShmem(int fd, MemMapping* pMap)
+{
+    off_t start;
+    size_t length, actual;
+    void* memPtr;
+
+    assert(pMap != NULL);
+
+    if (getFileStartAndLength(fd, &start, &length) < 0)
+        return -1;
+
+    memPtr = sysCreateAnonShmem(length);
+    if (memPtr == NULL)
+        return -1;
+
+    actual = read(fd, memPtr, length);
+    if (actual != length) {
+        LOGE("only read %d of %d bytes\n", (int) actual, (int) length);
+        sysReleaseShmem(pMap);
+        return -1;
+    }
+
+    pMap->baseAddr = pMap->addr = memPtr;
+    pMap->baseLength = pMap->length = length;
+
+    return 0;
+}
+
+/*
+ * Map a file (from fd's current offset) into a shared, read-only memory
+ * segment.  The file offset must be a multiple of the page size.
+ *
+ * On success, returns 0 and fills out "pMap".  On failure, returns a nonzero
+ * value and does not disturb "pMap".
+ */
+int sysMapFileInShmem(int fd, MemMapping* pMap)
+{
+    off_t start;
+    size_t length;
+    void* memPtr;
+
+    assert(pMap != NULL);
+
+    if (getFileStartAndLength(fd, &start, &length) < 0)
+        return -1;
+
+    memPtr = mmap(NULL, length, PROT_READ, MAP_FILE | MAP_SHARED, fd, start);
+    if (memPtr == MAP_FAILED) {
+        LOGW("mmap(%d, R, FILE|SHARED, %d, %d) failed: %s\n", (int) length,
+            fd, (int) start, strerror(errno));
+        return -1;
+    }
+
+    pMap->baseAddr = pMap->addr = memPtr;
+    pMap->baseLength = pMap->length = length;
+
+    return 0;
+}
+
+/*
+ * Map part of a file (from fd's current offset) into a shared, read-only
+ * memory segment.
+ *
+ * On success, returns 0 and fills out "pMap".  On failure, returns a nonzero
+ * value and does not disturb "pMap".
+ */
+int sysMapFileSegmentInShmem(int fd, off_t start, long length,
+    MemMapping* pMap)
+{
+    off_t dummy;
+    size_t fileLength, actualLength;
+    off_t actualStart;
+    int adjust;
+    void* memPtr;
+
+    assert(pMap != NULL);
+
+    if (getFileStartAndLength(fd, &dummy, &fileLength) < 0)
+        return -1;
+
+    if (start + length > (long)fileLength) {
+        LOGW("bad segment: st=%d len=%ld flen=%d\n",
+            (int) start, length, (int) fileLength);
+        return -1;
+    }
+
+    /* adjust to be page-aligned */
+    adjust = start % DEFAULT_PAGE_SIZE;
+    actualStart = start - adjust;
+    actualLength = length + adjust;
+
+    memPtr = mmap(NULL, actualLength, PROT_READ, MAP_FILE | MAP_SHARED,
+                fd, actualStart);
+    if (memPtr == MAP_FAILED) {
+        LOGW("mmap(%d, R, FILE|SHARED, %d, %d) failed: %s\n",
+            (int) actualLength, fd, (int) actualStart, strerror(errno));
+        return -1;
+    }
+
+    pMap->baseAddr = memPtr;
+    pMap->baseLength = actualLength;
+    pMap->addr = (char*)memPtr + adjust;
+    pMap->length = length;
+
+    LOGVV("mmap seg (st=%d ln=%d): bp=%p bl=%d ad=%p ln=%d\n",
+        (int) start, (int) length,
+        pMap->baseAddr, (int) pMap->baseLength,
+        pMap->addr, (int) pMap->length);
+
+    return 0;
+}
+
+/*
+ * Release a memory mapping.
+ */
+void sysReleaseShmem(MemMapping* pMap)
+{
+    if (pMap->baseAddr == NULL && pMap->baseLength == 0)
+        return;
+
+    if (munmap(pMap->baseAddr, pMap->baseLength) < 0) {
+        LOGW("munmap(%p, %d) failed: %s\n",
+            pMap->baseAddr, (int)pMap->baseLength, strerror(errno));
+    } else {
+        LOGV("munmap(%p, %d) succeeded\n", pMap->baseAddr, pMap->baseLength);
+        pMap->baseAddr = NULL;
+        pMap->baseLength = 0;
+    }
+}
+
diff --git a/minzip/SysUtil.h b/minzip/SysUtil.h
new file mode 100644
index 0000000..ec3a4bc
--- /dev/null
+++ b/minzip/SysUtil.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * System utilities.
+ */
+#ifndef _MINZIP_SYSUTIL
+#define _MINZIP_SYSUTIL
+
+#include "inline_magic.h"
+
+#include <sys/types.h>
+
+/*
+ * Use this to keep track of mapped segments.
+ */
+typedef struct MemMapping {
+    void*   addr;           /* start of data */
+    size_t  length;         /* length of data */
+
+    void*   baseAddr;       /* page-aligned base address */
+    size_t  baseLength;     /* length of mapping */
+} MemMapping;
+
+/* copy a map */
+INLINE void sysCopyMap(MemMapping* dst, const MemMapping* src) {
+    *dst = *src;
+}
+
+/*
+ * Load a file into a new shared memory segment.  All data from the current
+ * offset to the end of the file is pulled in.
+ *
+ * The segment is read-write, allowing VM fixups.  (It should be modified
+ * to support .gz/.zip compressed data.)
+ *
+ * On success, "pMap" is filled in, and zero is returned.
+ */
+int sysLoadFileInShmem(int fd, MemMapping* pMap);
+
+/*
+ * Map a file (from fd's current offset) into a shared,
+ * read-only memory segment.
+ *
+ * On success, "pMap" is filled in, and zero is returned.
+ */
+int sysMapFileInShmem(int fd, MemMapping* pMap);
+
+/*
+ * Like sysMapFileInShmem, but on only part of a file.
+ */
+int sysMapFileSegmentInShmem(int fd, off_t start, long length,
+    MemMapping* pMap);
+
+/*
+ * Release the pages associated with a shared memory segment.
+ *
+ * This does not free "pMap"; it just releases the memory.
+ */
+void sysReleaseShmem(MemMapping* pMap);
+
+#endif /*_MINZIP_SYSUTIL*/
diff --git a/minzip/Zip.c b/minzip/Zip.c
new file mode 100644
index 0000000..100c833
--- /dev/null
+++ b/minzip/Zip.c
@@ -0,0 +1,1098 @@
+/*
+ * 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 *fd)
+{
+    ssize_t n = write((int)fd, data, dataLen);
+    if (n != dataLen) {
+        LOGE("Can't write %d bytes (only %ld) from zip file: %s\n",
+                dataLen, n, strerror(errno));
+        return false;
+    }
+    return true;
+}
+
+/*
+ * 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;
+}
+
+/* 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)
+{
+    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;
+    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);
+                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);
+            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.
+                 */
+                int fd = creat(targetFile, UNZIP_FILEMODE);
+                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;
+                }
+
+                LOGD("Extracted file \"%s\"\n", targetFile);
+            }
+        }
+
+        if (callback != NULL) callback(targetFile, cookie);
+    }
+
+    free(helper.buf);
+    free(zpath);
+
+    return ok;
+}
diff --git a/minzip/Zip.h b/minzip/Zip.h
new file mode 100644
index 0000000..1c1df2f
--- /dev/null
+++ b/minzip/Zip.h
@@ -0,0 +1,206 @@
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * Simple Zip archive support.
+ */
+#ifndef _MINZIP_ZIP
+#define _MINZIP_ZIP
+
+#include "inline_magic.h"
+
+#include <stdlib.h>
+#include <utime.h>
+
+#include "Hash.h"
+#include "SysUtil.h"
+
+/*
+ * One entry in the Zip archive.  Treat this as opaque -- use accessors below.
+ *
+ * TODO: we're now keeping the pages mapped so we don't have to copy the
+ * filename.  We can change the accessors to retrieve the various pieces
+ * directly from the source file instead of copying them out, for a very
+ * slight speed hit and a modest reduction in memory usage.
+ */
+typedef struct ZipEntry {
+    unsigned int fileNameLen;
+    const char*  fileName;       // not null-terminated
+    long         offset;
+    long         compLen;
+    long         uncompLen;
+    int          compression;
+    long         modTime;
+    long         crc32;
+    int          versionMadeBy;
+    long         externalFileAttributes;
+} ZipEntry;
+
+/*
+ * One Zip archive.  Treat as opaque.
+ */
+typedef struct ZipArchive {
+    int         fd;
+    unsigned int numEntries;
+    ZipEntry*   pEntries;
+    HashTable*  pHash;          // maps file name to ZipEntry
+    MemMapping  map;
+} ZipArchive;
+
+/*
+ * Represents a non-NUL-terminated string,
+ * which is how entry names are stored.
+ */
+typedef struct {
+    const char *str;
+    size_t len;
+} UnterminatedString;
+
+/*
+ * Open a Zip archive.
+ *
+ * On success, returns 0 and populates "pArchive".  Returns nonzero errno
+ * value on failure.
+ */
+int mzOpenZipArchive(const char* fileName, ZipArchive* pArchive);
+
+/*
+ * Close archive, releasing resources associated with it.
+ *
+ * Depending on the implementation this could unmap pages used by classes
+ * stored in a Jar.  This should only be done after unloading classes.
+ */
+void mzCloseZipArchive(ZipArchive* pArchive);
+
+
+/*
+ * Find an entry in the Zip archive, by name.
+ */
+const ZipEntry* mzFindZipEntry(const ZipArchive* pArchive,
+        const char* entryName);
+
+/*
+ * Get the number of entries in the Zip archive.
+ */
+INLINE unsigned int mzZipEntryCount(const ZipArchive* pArchive) {
+    return pArchive->numEntries;
+}
+
+/*
+ * Get an entry by index.  Returns NULL if the index is out-of-bounds.
+ */
+INLINE const ZipEntry*
+mzGetZipEntryAt(const ZipArchive* pArchive, unsigned int index)
+{
+    if (index < pArchive->numEntries) {
+        return pArchive->pEntries + index;
+    }
+    return NULL;
+}
+
+/*
+ * Get the index number of an entry in the archive.
+ */
+INLINE unsigned int
+mzGetZipEntryIndex(const ZipArchive *pArchive, const ZipEntry *pEntry) {
+    return pEntry - pArchive->pEntries;
+}
+
+/*
+ * Simple accessors.
+ */
+INLINE UnterminatedString mzGetZipEntryFileName(const ZipEntry* pEntry) {
+    UnterminatedString ret;
+    ret.str = pEntry->fileName;
+    ret.len = pEntry->fileNameLen;
+    return ret;
+}
+INLINE long mzGetZipEntryOffset(const ZipEntry* pEntry) {
+    return pEntry->offset;
+}
+INLINE long mzGetZipEntryUncompLen(const ZipEntry* pEntry) {
+    return pEntry->uncompLen;
+}
+INLINE long mzGetZipEntryModTime(const ZipEntry* pEntry) {
+    return pEntry->modTime;
+}
+INLINE long mzGetZipEntryCrc32(const ZipEntry* pEntry) {
+    return pEntry->crc32;
+}
+bool mzIsZipEntrySymlink(const ZipEntry* pEntry);
+
+
+/*
+ * Type definition for the callback function used by
+ * mzProcessZipEntryContents().
+ */
+typedef bool (*ProcessZipEntryContentsFunction)(const unsigned char *data,
+    int dataLen, void *cookie);
+
+/*
+ * 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);
+
+/*
+ * Read an entry into a buffer allocated by the caller.
+ */
+bool mzReadZipEntry(const ZipArchive* pArchive, const ZipEntry* pEntry,
+        char* buf, int bufLen);
+
+/*
+ * 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);
+
+/*
+ * Inflate and write an entry to a file.
+ */
+bool mzExtractZipEntryToFile(const ZipArchive *pArchive,
+    const ZipEntry *pEntry, int fd);
+
+/*
+ * 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
+ *
+ * flags is zero or more of the following:
+ *
+ *     MZ_EXTRACT_FILES_ONLY - only unpack files, not directories or symlinks
+ *     MZ_EXTRACT_DRY_RUN - don't do anything, but do invoke the callback
+ *
+ * If timestamp is non-NULL, file timestamps will be set accordingly.
+ *
+ * If callback is non-NULL, it will be invoked with each unpacked file.
+ *
+ * Returns true on success, false on failure.
+ */
+enum { MZ_EXTRACT_FILES_ONLY = 1, MZ_EXTRACT_DRY_RUN = 2 };
+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);
+
+#endif /*_MINZIP_ZIP*/
diff --git a/minzip/inline_magic.h b/minzip/inline_magic.h
new file mode 100644
index 0000000..8c185e1
--- /dev/null
+++ b/minzip/inline_magic.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINZIP_INLINE_MAGIC_H_
+#define MINZIP_INLINE_MAGIC_H_
+
+#ifndef MINZIP_GENERATE_INLINES
+#define INLINE extern __inline__
+#else
+#define INLINE
+#endif
+
+#endif  // MINZIP_INLINE_MAGIC_H_