eclair snapshot

1 files changed, 696 insertions, 0 deletions

diff --git a/tools/aapt/ZipEntry.cpp b/tools/aapt/ZipEntry.cpp
new file mode 100644
index 0000000..a0b54c2
--- /dev/null
+++ b/tools/aapt/ZipEntry.cpp
@@ -0,0 +1,696 @@
+/*
+ * Copyright (C) 2006 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.
+ */
+
+//
+// Access to entries in a Zip archive.
+//
+
+#define LOG_TAG "zip"
+
+#include "ZipEntry.h"
+#include <utils/Log.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+using namespace android;
+
+/*
+ * Initialize a new ZipEntry structure from a FILE* positioned at a
+ * CentralDirectoryEntry.
+ *
+ * On exit, the file pointer will be at the start of the next CDE or
+ * at the EOCD.
+ */
+status_t ZipEntry::initFromCDE(FILE* fp)
+{
+    status_t result;
+    long posn;
+    bool hasDD;
+
+    //LOGV("initFromCDE ---\n");
+
+    /* read the CDE */
+    result = mCDE.read(fp);
+    if (result != NO_ERROR) {
+        LOGD("mCDE.read failed\n");
+        return result;
+    }
+
+    //mCDE.dump();
+
+    /* using the info in the CDE, go load up the LFH */
+    posn = ftell(fp);
+    if (fseek(fp, mCDE.mLocalHeaderRelOffset, SEEK_SET) != 0) {
+        LOGD("local header seek failed (%ld)\n",
+            mCDE.mLocalHeaderRelOffset);
+        return UNKNOWN_ERROR;
+    }
+
+    result = mLFH.read(fp);
+    if (result != NO_ERROR) {
+        LOGD("mLFH.read failed\n");
+        return result;
+    }
+
+    if (fseek(fp, posn, SEEK_SET) != 0)
+        return UNKNOWN_ERROR;
+
+    //mLFH.dump();
+
+    /*
+     * We *might* need to read the Data Descriptor at this point and
+     * integrate it into the LFH.  If this bit is set, the CRC-32,
+     * compressed size, and uncompressed size will be zero.  In practice
+     * these seem to be rare.
+     */
+    hasDD = (mLFH.mGPBitFlag & kUsesDataDescr) != 0;
+    if (hasDD) {
+        // do something clever
+        //LOGD("+++ has data descriptor\n");
+    }
+
+    /*
+     * Sanity-check the LFH.  Note that this will fail if the "kUsesDataDescr"
+     * flag is set, because the LFH is incomplete.  (Not a problem, since we
+     * prefer the CDE values.)
+     */
+    if (!hasDD && !compareHeaders()) {
+        LOGW("warning: header mismatch\n");
+        // keep going?
+    }
+
+    /*
+     * If the mVersionToExtract is greater than 20, we may have an
+     * issue unpacking the record -- could be encrypted, compressed
+     * with something we don't support, or use Zip64 extensions.  We
+     * can defer worrying about that to when we're extracting data.
+     */
+
+    return NO_ERROR;
+}
+
+/*
+ * Initialize a new entry.  Pass in the file name and an optional comment.
+ *
+ * Initializes the CDE and the LFH.
+ */
+void ZipEntry::initNew(const char* fileName, const char* comment)
+{
+    assert(fileName != NULL && *fileName != '\0');  // name required
+
+    /* most fields are properly initialized by constructor */
+    mCDE.mVersionMadeBy = kDefaultMadeBy;
+    mCDE.mVersionToExtract = kDefaultVersion;
+    mCDE.mCompressionMethod = kCompressStored;
+    mCDE.mFileNameLength = strlen(fileName);
+    if (comment != NULL)
+        mCDE.mFileCommentLength = strlen(comment);
+    mCDE.mExternalAttrs = 0x81b60020;   // matches what WinZip does
+
+    if (mCDE.mFileNameLength > 0) {
+        mCDE.mFileName = new unsigned char[mCDE.mFileNameLength+1];
+        strcpy((char*) mCDE.mFileName, fileName);
+    }
+    if (mCDE.mFileCommentLength > 0) {
+        /* TODO: stop assuming null-terminated ASCII here? */
+        mCDE.mFileComment = new unsigned char[mCDE.mFileCommentLength+1];
+        strcpy((char*) mCDE.mFileComment, comment);
+    }
+
+    copyCDEtoLFH();
+}
+
+/*
+ * Initialize a new entry, starting with the ZipEntry from a different
+ * archive.
+ *
+ * Initializes the CDE and the LFH.
+ */
+status_t ZipEntry::initFromExternal(const ZipFile* pZipFile,
+    const ZipEntry* pEntry)
+{
+    /*
+     * Copy everything in the CDE over, then fix up the hairy bits.
+     */
+    memcpy(&mCDE, &pEntry->mCDE, sizeof(mCDE));
+
+    if (mCDE.mFileNameLength > 0) {
+        mCDE.mFileName = new unsigned char[mCDE.mFileNameLength+1];
+        if (mCDE.mFileName == NULL)
+            return NO_MEMORY;
+        strcpy((char*) mCDE.mFileName, (char*)pEntry->mCDE.mFileName);
+    }
+    if (mCDE.mFileCommentLength > 0) {
+        mCDE.mFileComment = new unsigned char[mCDE.mFileCommentLength+1];
+        if (mCDE.mFileComment == NULL)
+            return NO_MEMORY;
+        strcpy((char*) mCDE.mFileComment, (char*)pEntry->mCDE.mFileComment);
+    }
+    if (mCDE.mExtraFieldLength > 0) {
+        /* we null-terminate this, though it may not be a string */
+        mCDE.mExtraField = new unsigned char[mCDE.mExtraFieldLength+1];
+        if (mCDE.mExtraField == NULL)
+            return NO_MEMORY;
+        memcpy(mCDE.mExtraField, pEntry->mCDE.mExtraField,
+            mCDE.mExtraFieldLength+1);
+    }
+
+    /* construct the LFH from the CDE */
+    copyCDEtoLFH();
+
+    /*
+     * The LFH "extra" field is independent of the CDE "extra", so we
+     * handle it here.
+     */
+    assert(mLFH.mExtraField == NULL);
+    mLFH.mExtraFieldLength = pEntry->mLFH.mExtraFieldLength;
+    if (mLFH.mExtraFieldLength > 0) {
+        mLFH.mExtraField = new unsigned char[mLFH.mExtraFieldLength+1];
+        if (mLFH.mExtraField == NULL)
+            return NO_MEMORY;
+        memcpy(mLFH.mExtraField, pEntry->mLFH.mExtraField,
+            mLFH.mExtraFieldLength+1);
+    }
+
+    return NO_ERROR;
+}
+
+/*
+ * Insert pad bytes in the LFH by tweaking the "extra" field.  This will
+ * potentially confuse something that put "extra" data in here earlier,
+ * but I can't find an actual problem.
+ */
+status_t ZipEntry::addPadding(int padding)
+{
+    if (padding <= 0)
+        return INVALID_OPERATION;
+
+    //LOGI("HEY: adding %d pad bytes to existing %d in %s\n",
+    //    padding, mLFH.mExtraFieldLength, mCDE.mFileName);
+
+    if (mLFH.mExtraFieldLength > 0) {
+        /* extend existing field */
+        unsigned char* newExtra;
+
+        newExtra = new unsigned char[mLFH.mExtraFieldLength + padding];
+        if (newExtra == NULL)
+            return NO_MEMORY;
+        memset(newExtra + mLFH.mExtraFieldLength, 0, padding);
+        memcpy(newExtra, mLFH.mExtraField, mLFH.mExtraFieldLength);
+
+        delete[] mLFH.mExtraField;
+        mLFH.mExtraField = newExtra;
+        mLFH.mExtraFieldLength += padding;
+    } else {
+        /* create new field */
+        mLFH.mExtraField = new unsigned char[padding];
+        memset(mLFH.mExtraField, 0, padding);
+        mLFH.mExtraFieldLength = padding;
+    }
+
+    return NO_ERROR;
+}
+
+/*
+ * Set the fields in the LFH equal to the corresponding fields in the CDE.
+ *
+ * This does not touch the LFH "extra" field.
+ */
+void ZipEntry::copyCDEtoLFH(void)
+{
+    mLFH.mVersionToExtract  = mCDE.mVersionToExtract;
+    mLFH.mGPBitFlag         = mCDE.mGPBitFlag;
+    mLFH.mCompressionMethod = mCDE.mCompressionMethod;
+    mLFH.mLastModFileTime   = mCDE.mLastModFileTime;
+    mLFH.mLastModFileDate   = mCDE.mLastModFileDate;
+    mLFH.mCRC32             = mCDE.mCRC32;
+    mLFH.mCompressedSize    = mCDE.mCompressedSize;
+    mLFH.mUncompressedSize  = mCDE.mUncompressedSize;
+    mLFH.mFileNameLength    = mCDE.mFileNameLength;
+    // the "extra field" is independent
+
+    delete[] mLFH.mFileName;
+    if (mLFH.mFileNameLength > 0) {
+        mLFH.mFileName = new unsigned char[mLFH.mFileNameLength+1];
+        strcpy((char*) mLFH.mFileName, (const char*) mCDE.mFileName);
+    } else {
+        mLFH.mFileName = NULL;
+    }
+}
+
+/*
+ * Set some information about a file after we add it.
+ */
+void ZipEntry::setDataInfo(long uncompLen, long compLen, unsigned long crc32,
+    int compressionMethod)
+{
+    mCDE.mCompressionMethod = compressionMethod;
+    mCDE.mCRC32 = crc32;
+    mCDE.mCompressedSize = compLen;
+    mCDE.mUncompressedSize = uncompLen;
+    mCDE.mCompressionMethod = compressionMethod;
+    if (compressionMethod == kCompressDeflated) {
+        mCDE.mGPBitFlag |= 0x0002;      // indicates maximum compression used
+    }
+    copyCDEtoLFH();
+}
+
+/*
+ * See if the data in mCDE and mLFH match up.  This is mostly useful for
+ * debugging these classes, but it can be used to identify damaged
+ * archives.
+ *
+ * Returns "false" if they differ.
+ */
+bool ZipEntry::compareHeaders(void) const
+{
+    if (mCDE.mVersionToExtract != mLFH.mVersionToExtract) {
+        LOGV("cmp: VersionToExtract\n");
+        return false;
+    }
+    if (mCDE.mGPBitFlag != mLFH.mGPBitFlag) {
+        LOGV("cmp: GPBitFlag\n");
+        return false;
+    }
+    if (mCDE.mCompressionMethod != mLFH.mCompressionMethod) {
+        LOGV("cmp: CompressionMethod\n");
+        return false;
+    }
+    if (mCDE.mLastModFileTime != mLFH.mLastModFileTime) {
+        LOGV("cmp: LastModFileTime\n");
+        return false;
+    }
+    if (mCDE.mLastModFileDate != mLFH.mLastModFileDate) {
+        LOGV("cmp: LastModFileDate\n");
+        return false;
+    }
+    if (mCDE.mCRC32 != mLFH.mCRC32) {
+        LOGV("cmp: CRC32\n");
+        return false;
+    }
+    if (mCDE.mCompressedSize != mLFH.mCompressedSize) {
+        LOGV("cmp: CompressedSize\n");
+        return false;
+    }
+    if (mCDE.mUncompressedSize != mLFH.mUncompressedSize) {
+        LOGV("cmp: UncompressedSize\n");
+        return false;
+    }
+    if (mCDE.mFileNameLength != mLFH.mFileNameLength) {
+        LOGV("cmp: FileNameLength\n");
+        return false;
+    }
+#if 0       // this seems to be used for padding, not real data
+    if (mCDE.mExtraFieldLength != mLFH.mExtraFieldLength) {
+        LOGV("cmp: ExtraFieldLength\n");
+        return false;
+    }
+#endif
+    if (mCDE.mFileName != NULL) {
+        if (strcmp((char*) mCDE.mFileName, (char*) mLFH.mFileName) != 0) {
+            LOGV("cmp: FileName\n");
+            return false;
+        }
+    }
+
+    return true;
+}
+
+
+/*
+ * Convert the DOS date/time stamp into a UNIX time stamp.
+ */
+time_t ZipEntry::getModWhen(void) const
+{
+    struct tm parts;
+
+    parts.tm_sec = (mCDE.mLastModFileTime & 0x001f) << 1;
+    parts.tm_min = (mCDE.mLastModFileTime & 0x07e0) >> 5;
+    parts.tm_hour = (mCDE.mLastModFileTime & 0xf800) >> 11;
+    parts.tm_mday = (mCDE.mLastModFileDate & 0x001f);
+    parts.tm_mon = ((mCDE.mLastModFileDate & 0x01e0) >> 5) -1;
+    parts.tm_year = ((mCDE.mLastModFileDate & 0xfe00) >> 9) + 80;
+    parts.tm_wday = parts.tm_yday = 0;
+    parts.tm_isdst = -1;        // DST info "not available"
+
+    return mktime(&parts);
+}
+
+/*
+ * Set the CDE/LFH timestamp from UNIX time.
+ */
+void ZipEntry::setModWhen(time_t when)
+{
+#ifdef HAVE_LOCALTIME_R
+    struct tm tmResult;
+#endif
+    time_t even;
+    unsigned short zdate, ztime;
+
+    struct tm* ptm;
+
+    /* round up to an even number of seconds */
+    even = (time_t)(((unsigned long)(when) + 1) & (~1));
+
+    /* expand */
+#ifdef HAVE_LOCALTIME_R
+    ptm = localtime_r(&even, &tmResult);
+#else
+    ptm = localtime(&even);
+#endif
+
+    int year;
+    year = ptm->tm_year;
+    if (year < 80)
+        year = 80;
+
+    zdate = (year - 80) << 9 | (ptm->tm_mon+1) << 5 | ptm->tm_mday;
+    ztime = ptm->tm_hour << 11 | ptm->tm_min << 5 | ptm->tm_sec >> 1;
+
+    mCDE.mLastModFileTime = mLFH.mLastModFileTime = ztime;
+    mCDE.mLastModFileDate = mLFH.mLastModFileDate = zdate;
+}
+
+
+/*
+ * ===========================================================================
+ *      ZipEntry::LocalFileHeader
+ * ===========================================================================
+ */
+
+/*
+ * Read a local file header.
+ *
+ * On entry, "fp" points to the signature at the start of the header.
+ * On exit, "fp" points to the start of data.
+ */
+status_t ZipEntry::LocalFileHeader::read(FILE* fp)
+{
+    status_t result = NO_ERROR;
+    unsigned char buf[kLFHLen];
+
+    assert(mFileName == NULL);
+    assert(mExtraField == NULL);
+
+    if (fread(buf, 1, kLFHLen, fp) != kLFHLen) {
+        result = UNKNOWN_ERROR;
+        goto bail;
+    }
+
+    if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) {
+        LOGD("whoops: didn't find expected signature\n");
+        result = UNKNOWN_ERROR;
+        goto bail;
+    }
+
+    mVersionToExtract = ZipEntry::getShortLE(&buf[0x04]);
+    mGPBitFlag = ZipEntry::getShortLE(&buf[0x06]);
+    mCompressionMethod = ZipEntry::getShortLE(&buf[0x08]);
+    mLastModFileTime = ZipEntry::getShortLE(&buf[0x0a]);
+    mLastModFileDate = ZipEntry::getShortLE(&buf[0x0c]);
+    mCRC32 = ZipEntry::getLongLE(&buf[0x0e]);
+    mCompressedSize = ZipEntry::getLongLE(&buf[0x12]);
+    mUncompressedSize = ZipEntry::getLongLE(&buf[0x16]);
+    mFileNameLength = ZipEntry::getShortLE(&buf[0x1a]);
+    mExtraFieldLength = ZipEntry::getShortLE(&buf[0x1c]);
+
+    // TODO: validate sizes
+
+    /* grab filename */
+    if (mFileNameLength != 0) {
+        mFileName = new unsigned char[mFileNameLength+1];
+        if (mFileName == NULL) {
+            result = NO_MEMORY;
+            goto bail;
+        }
+        if (fread(mFileName, 1, mFileNameLength, fp) != mFileNameLength) {
+            result = UNKNOWN_ERROR;
+            goto bail;
+        }
+        mFileName[mFileNameLength] = '\0';
+    }
+
+    /* grab extra field */
+    if (mExtraFieldLength != 0) {
+        mExtraField = new unsigned char[mExtraFieldLength+1];
+        if (mExtraField == NULL) {
+            result = NO_MEMORY;
+            goto bail;
+        }
+        if (fread(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) {
+            result = UNKNOWN_ERROR;
+            goto bail;
+        }
+        mExtraField[mExtraFieldLength] = '\0';
+    }
+
+bail:
+    return result;
+}
+
+/*
+ * Write a local file header.
+ */
+status_t ZipEntry::LocalFileHeader::write(FILE* fp)
+{
+    unsigned char buf[kLFHLen];
+
+    ZipEntry::putLongLE(&buf[0x00], kSignature);
+    ZipEntry::putShortLE(&buf[0x04], mVersionToExtract);
+    ZipEntry::putShortLE(&buf[0x06], mGPBitFlag);
+    ZipEntry::putShortLE(&buf[0x08], mCompressionMethod);
+    ZipEntry::putShortLE(&buf[0x0a], mLastModFileTime);
+    ZipEntry::putShortLE(&buf[0x0c], mLastModFileDate);
+    ZipEntry::putLongLE(&buf[0x0e], mCRC32);
+    ZipEntry::putLongLE(&buf[0x12], mCompressedSize);
+    ZipEntry::putLongLE(&buf[0x16], mUncompressedSize);
+    ZipEntry::putShortLE(&buf[0x1a], mFileNameLength);
+    ZipEntry::putShortLE(&buf[0x1c], mExtraFieldLength);
+
+    if (fwrite(buf, 1, kLFHLen, fp) != kLFHLen)
+        return UNKNOWN_ERROR;
+
+    /* write filename */
+    if (mFileNameLength != 0) {
+        if (fwrite(mFileName, 1, mFileNameLength, fp) != mFileNameLength)
+            return UNKNOWN_ERROR;
+    }
+
+    /* write "extra field" */
+    if (mExtraFieldLength != 0) {
+        if (fwrite(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength)
+            return UNKNOWN_ERROR;
+    }
+
+    return NO_ERROR;
+}
+
+
+/*
+ * Dump the contents of a LocalFileHeader object.
+ */
+void ZipEntry::LocalFileHeader::dump(void) const
+{
+    LOGD(" LocalFileHeader contents:\n");
+    LOGD("  versToExt=%u gpBits=0x%04x compression=%u\n",
+        mVersionToExtract, mGPBitFlag, mCompressionMethod);
+    LOGD("  modTime=0x%04x modDate=0x%04x crc32=0x%08lx\n",
+        mLastModFileTime, mLastModFileDate, mCRC32);
+    LOGD("  compressedSize=%lu uncompressedSize=%lu\n",
+        mCompressedSize, mUncompressedSize);
+    LOGD("  filenameLen=%u extraLen=%u\n",
+        mFileNameLength, mExtraFieldLength);
+    if (mFileName != NULL)
+        LOGD("  filename: '%s'\n", mFileName);
+}
+
+
+/*
+ * ===========================================================================
+ *      ZipEntry::CentralDirEntry
+ * ===========================================================================
+ */
+
+/*
+ * Read the central dir entry that appears next in the file.
+ *
+ * On entry, "fp" should be positioned on the signature bytes for the
+ * entry.  On exit, "fp" will point at the signature word for the next
+ * entry or for the EOCD.
+ */
+status_t ZipEntry::CentralDirEntry::read(FILE* fp)
+{
+    status_t result = NO_ERROR;
+    unsigned char buf[kCDELen];
+
+    /* no re-use */
+    assert(mFileName == NULL);
+    assert(mExtraField == NULL);
+    assert(mFileComment == NULL);
+
+    if (fread(buf, 1, kCDELen, fp) != kCDELen) {
+        result = UNKNOWN_ERROR;
+        goto bail;
+    }
+
+    if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) {
+        LOGD("Whoops: didn't find expected signature\n");
+        result = UNKNOWN_ERROR;
+        goto bail;
+    }
+
+    mVersionMadeBy = ZipEntry::getShortLE(&buf[0x04]);
+    mVersionToExtract = ZipEntry::getShortLE(&buf[0x06]);
+    mGPBitFlag = ZipEntry::getShortLE(&buf[0x08]);
+    mCompressionMethod = ZipEntry::getShortLE(&buf[0x0a]);
+    mLastModFileTime = ZipEntry::getShortLE(&buf[0x0c]);
+    mLastModFileDate = ZipEntry::getShortLE(&buf[0x0e]);
+    mCRC32 = ZipEntry::getLongLE(&buf[0x10]);
+    mCompressedSize = ZipEntry::getLongLE(&buf[0x14]);
+    mUncompressedSize = ZipEntry::getLongLE(&buf[0x18]);
+    mFileNameLength = ZipEntry::getShortLE(&buf[0x1c]);
+    mExtraFieldLength = ZipEntry::getShortLE(&buf[0x1e]);
+    mFileCommentLength = ZipEntry::getShortLE(&buf[0x20]);
+    mDiskNumberStart = ZipEntry::getShortLE(&buf[0x22]);
+    mInternalAttrs = ZipEntry::getShortLE(&buf[0x24]);
+    mExternalAttrs = ZipEntry::getLongLE(&buf[0x26]);
+    mLocalHeaderRelOffset = ZipEntry::getLongLE(&buf[0x2a]);
+
+    // TODO: validate sizes and offsets
+
+    /* grab filename */
+    if (mFileNameLength != 0) {
+        mFileName = new unsigned char[mFileNameLength+1];
+        if (mFileName == NULL) {
+            result = NO_MEMORY;
+            goto bail;
+        }
+        if (fread(mFileName, 1, mFileNameLength, fp) != mFileNameLength) {
+            result = UNKNOWN_ERROR;
+            goto bail;
+        }
+        mFileName[mFileNameLength] = '\0';
+    }
+
+    /* read "extra field" */
+    if (mExtraFieldLength != 0) {
+        mExtraField = new unsigned char[mExtraFieldLength+1];
+        if (mExtraField == NULL) {
+            result = NO_MEMORY;
+            goto bail;
+        }
+        if (fread(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) {
+            result = UNKNOWN_ERROR;
+            goto bail;
+        }
+        mExtraField[mExtraFieldLength] = '\0';
+    }
+
+
+    /* grab comment, if any */
+    if (mFileCommentLength != 0) {
+        mFileComment = new unsigned char[mFileCommentLength+1];
+        if (mFileComment == NULL) {
+            result = NO_MEMORY;
+            goto bail;
+        }
+        if (fread(mFileComment, 1, mFileCommentLength, fp) != mFileCommentLength)
+        {
+            result = UNKNOWN_ERROR;
+            goto bail;
+        }
+        mFileComment[mFileCommentLength] = '\0';
+    }
+
+bail:
+    return result;
+}
+
+/*
+ * Write a central dir entry.
+ */
+status_t ZipEntry::CentralDirEntry::write(FILE* fp)
+{
+    unsigned char buf[kCDELen];
+
+    ZipEntry::putLongLE(&buf[0x00], kSignature);
+    ZipEntry::putShortLE(&buf[0x04], mVersionMadeBy);
+    ZipEntry::putShortLE(&buf[0x06], mVersionToExtract);
+    ZipEntry::putShortLE(&buf[0x08], mGPBitFlag);
+    ZipEntry::putShortLE(&buf[0x0a], mCompressionMethod);
+    ZipEntry::putShortLE(&buf[0x0c], mLastModFileTime);
+    ZipEntry::putShortLE(&buf[0x0e], mLastModFileDate);
+    ZipEntry::putLongLE(&buf[0x10], mCRC32);
+    ZipEntry::putLongLE(&buf[0x14], mCompressedSize);
+    ZipEntry::putLongLE(&buf[0x18], mUncompressedSize);
+    ZipEntry::putShortLE(&buf[0x1c], mFileNameLength);
+    ZipEntry::putShortLE(&buf[0x1e], mExtraFieldLength);
+    ZipEntry::putShortLE(&buf[0x20], mFileCommentLength);
+    ZipEntry::putShortLE(&buf[0x22], mDiskNumberStart);
+    ZipEntry::putShortLE(&buf[0x24], mInternalAttrs);
+    ZipEntry::putLongLE(&buf[0x26], mExternalAttrs);
+    ZipEntry::putLongLE(&buf[0x2a], mLocalHeaderRelOffset);
+
+    if (fwrite(buf, 1, kCDELen, fp) != kCDELen)
+        return UNKNOWN_ERROR;
+
+    /* write filename */
+    if (mFileNameLength != 0) {
+        if (fwrite(mFileName, 1, mFileNameLength, fp) != mFileNameLength)
+            return UNKNOWN_ERROR;
+    }
+
+    /* write "extra field" */
+    if (mExtraFieldLength != 0) {
+        if (fwrite(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength)
+            return UNKNOWN_ERROR;
+    }
+
+    /* write comment */
+    if (mFileCommentLength != 0) {
+        if (fwrite(mFileComment, 1, mFileCommentLength, fp) != mFileCommentLength)
+            return UNKNOWN_ERROR;
+    }
+
+    return NO_ERROR;
+}
+
+/*
+ * Dump the contents of a CentralDirEntry object.
+ */
+void ZipEntry::CentralDirEntry::dump(void) const
+{
+    LOGD(" CentralDirEntry contents:\n");
+    LOGD("  versMadeBy=%u versToExt=%u gpBits=0x%04x compression=%u\n",
+        mVersionMadeBy, mVersionToExtract, mGPBitFlag, mCompressionMethod);
+    LOGD("  modTime=0x%04x modDate=0x%04x crc32=0x%08lx\n",
+        mLastModFileTime, mLastModFileDate, mCRC32);
+    LOGD("  compressedSize=%lu uncompressedSize=%lu\n",
+        mCompressedSize, mUncompressedSize);
+    LOGD("  filenameLen=%u extraLen=%u commentLen=%u\n",
+        mFileNameLength, mExtraFieldLength, mFileCommentLength);
+    LOGD("  diskNumStart=%u intAttr=0x%04x extAttr=0x%08lx relOffset=%lu\n",
+        mDiskNumberStart, mInternalAttrs, mExternalAttrs,
+        mLocalHeaderRelOffset);
+
+    if (mFileName != NULL)
+        LOGD("  filename: '%s'\n", mFileName);
+    if (mFileComment != NULL)
+        LOGD("  comment: '%s'\n", mFileComment);
+}
+