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-rw-r--r--libs/utils/ZipUtils.cpp344
1 files changed, 0 insertions, 344 deletions
diff --git a/libs/utils/ZipUtils.cpp b/libs/utils/ZipUtils.cpp
deleted file mode 100644
index bfbacfe..0000000
--- a/libs/utils/ZipUtils.cpp
+++ /dev/null
@@ -1,344 +0,0 @@
-/*
- * 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.
- */
-
-//
-// Misc zip/gzip utility functions.
-//
-
-#define LOG_TAG "ziputil"
-
-#include "utils/ZipUtils.h"
-#include "utils/ZipFileRO.h"
-#include "utils/Log.h"
-
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-
-#include <zlib.h>
-
-using namespace android;
-
-/*
- * Utility function that expands zip/gzip "deflate" compressed data
- * into a buffer.
- *
- * "fd" is an open file positioned at the start of the "deflate" data
- * "buf" must hold at least "uncompressedLen" bytes.
- */
-/*static*/ bool ZipUtils::inflateToBuffer(int fd, void* buf,
- long uncompressedLen, long compressedLen)
-{
- bool result = false;
- const unsigned long kReadBufSize = 32768;
- unsigned char* readBuf = NULL;
- z_stream zstream;
- int zerr;
- unsigned long compRemaining;
-
- assert(uncompressedLen >= 0);
- assert(compressedLen >= 0);
-
- readBuf = new unsigned char[kReadBufSize];
- if (readBuf == NULL)
- goto bail;
- compRemaining = compressedLen;
-
- /*
- * 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*) buf;
- zstream.avail_out = uncompressedLen;
- 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 {
- unsigned long getSize;
-
- /* read as much as we can */
- if (zstream.avail_in == 0) {
- getSize = (compRemaining > kReadBufSize) ?
- kReadBufSize : compRemaining;
- LOGV("+++ reading %ld bytes (%ld left)\n",
- getSize, compRemaining);
-
- int cc = read(fd, readBuf, getSize);
- if (cc != (int) getSize) {
- LOGD("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;
- }
-
- /* output buffer holds all, so no need to write the output */
- } while (zerr == Z_OK);
-
- assert(zerr == Z_STREAM_END); /* other errors should've been caught */
-
- if ((long) zstream.total_out != uncompressedLen) {
- LOGW("Size mismatch on inflated file (%ld vs %ld)\n",
- zstream.total_out, uncompressedLen);
- goto z_bail;
- }
-
- // success!
- result = true;
-
-z_bail:
- inflateEnd(&zstream); /* free up any allocated structures */
-
-bail:
- delete[] readBuf;
- return result;
-}
-
-/*
- * Utility function that expands zip/gzip "deflate" compressed data
- * into a buffer.
- *
- * (This is a clone of the previous function, but it takes a FILE* instead
- * of an fd. We could pass fileno(fd) to the above, but we can run into
- * trouble when "fp" has a different notion of what fd's file position is.)
- *
- * "fp" is an open file positioned at the start of the "deflate" data
- * "buf" must hold at least "uncompressedLen" bytes.
- */
-/*static*/ bool ZipUtils::inflateToBuffer(FILE* fp, void* buf,
- long uncompressedLen, long compressedLen)
-{
- bool result = false;
- const unsigned long kReadBufSize = 32768;
- unsigned char* readBuf = NULL;
- z_stream zstream;
- int zerr;
- unsigned long compRemaining;
-
- assert(uncompressedLen >= 0);
- assert(compressedLen >= 0);
-
- readBuf = new unsigned char[kReadBufSize];
- if (readBuf == NULL)
- goto bail;
- compRemaining = compressedLen;
-
- /*
- * 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*) buf;
- zstream.avail_out = uncompressedLen;
- 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 {
- unsigned long getSize;
-
- /* read as much as we can */
- if (zstream.avail_in == 0) {
- getSize = (compRemaining > kReadBufSize) ?
- kReadBufSize : compRemaining;
- LOGV("+++ reading %ld bytes (%ld left)\n",
- getSize, compRemaining);
-
- int cc = fread(readBuf, getSize, 1, fp);
- if (cc != (int) getSize) {
- LOGD("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;
- }
-
- /* output buffer holds all, so no need to write the output */
- } while (zerr == Z_OK);
-
- assert(zerr == Z_STREAM_END); /* other errors should've been caught */
-
- if ((long) zstream.total_out != uncompressedLen) {
- LOGW("Size mismatch on inflated file (%ld vs %ld)\n",
- zstream.total_out, uncompressedLen);
- goto z_bail;
- }
-
- // success!
- result = true;
-
-z_bail:
- inflateEnd(&zstream); /* free up any allocated structures */
-
-bail:
- delete[] readBuf;
- return result;
-}
-
-/*
- * Look at the contents of a gzip archive. We want to know where the
- * data starts, and how long it will be after it is uncompressed.
- *
- * We expect to find the CRC and length as the last 8 bytes on the file.
- * This is a pretty reasonable thing to expect for locally-compressed
- * files, but there's a small chance that some extra padding got thrown
- * on (the man page talks about compressed data written to tape). We
- * don't currently deal with that here. If "gzip -l" whines, we're going
- * to fail too.
- *
- * On exit, "fp" is pointing at the start of the compressed data.
- */
-/*static*/ bool ZipUtils::examineGzip(FILE* fp, int* pCompressionMethod,
- long* pUncompressedLen, long* pCompressedLen, unsigned long* pCRC32)
-{
- enum { // flags
- FTEXT = 0x01,
- FHCRC = 0x02,
- FEXTRA = 0x04,
- FNAME = 0x08,
- FCOMMENT = 0x10,
- };
- int ic;
- int method, flags;
- int i;
-
- ic = getc(fp);
- if (ic != 0x1f || getc(fp) != 0x8b)
- return false; // not gzip
- method = getc(fp);
- flags = getc(fp);
-
- /* quick sanity checks */
- if (method == EOF || flags == EOF)
- return false;
- if (method != ZipFileRO::kCompressDeflated)
- return false;
-
- /* skip over 4 bytes of mod time, 1 byte XFL, 1 byte OS */
- for (i = 0; i < 6; i++)
- (void) getc(fp);
- /* consume "extra" field, if present */
- if ((flags & FEXTRA) != 0) {
- int len;
-
- len = getc(fp);
- len |= getc(fp) << 8;
- while (len-- && getc(fp) != EOF)
- ;
- }
- /* consume filename, if present */
- if ((flags & FNAME) != 0) {
- do {
- ic = getc(fp);
- } while (ic != 0 && ic != EOF);
- }
- /* consume comment, if present */
- if ((flags & FCOMMENT) != 0) {
- do {
- ic = getc(fp);
- } while (ic != 0 && ic != EOF);
- }
- /* consume 16-bit header CRC, if present */
- if ((flags & FHCRC) != 0) {
- (void) getc(fp);
- (void) getc(fp);
- }
-
- if (feof(fp) || ferror(fp))
- return false;
-
- /* seek to the end; CRC and length are in the last 8 bytes */
- long curPosn = ftell(fp);
- unsigned char buf[8];
- fseek(fp, -8, SEEK_END);
- *pCompressedLen = ftell(fp) - curPosn;
-
- if (fread(buf, 1, 8, fp) != 8)
- return false;
- /* seek back to start of compressed data */
- fseek(fp, curPosn, SEEK_SET);
-
- *pCompressionMethod = method;
- *pCRC32 = ZipFileRO::get4LE(&buf[0]);
- *pUncompressedLen = ZipFileRO::get4LE(&buf[4]);
-
- return true;
-}
-
generated by cgit v1.1 at 2024-05-25 06:53:34 +0000