ResourceTypes.cpp | searchcode

/frameworks/base/libs/androidfw/ResourceTypes.cpp

https://gitlab.com/brian0218/rk3066_r-box_android4.2.2_sdk
C++ | 1474 lines | 1224 code | 153 blank | 97 comment | 292 complexity | dd8bd439d64b3614fb92a7328eb10094 MD5 | raw file

/*
 * Copyright (C) 2008 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.
 */

#define LOG_TAG "ResourceType"
//#define LOG_NDEBUG 0

#include <androidfw/ResourceTypes.h>
#include <utils/Atomic.h>
#include <utils/ByteOrder.h>
#include <utils/Debug.h>
#include <utils/Log.h>
#include <utils/String16.h>
#include <utils/String8.h>
#include <utils/TextOutput.h>

#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <ctype.h>
#include <stdint.h>

#ifndef INT32_MAX
#define INT32_MAX ((int32_t)(2147483647))
#endif

#define POOL_NOISY(x) //x
#define XML_NOISY(x) //x
#define TABLE_NOISY(x) //x
#define TABLE_GETENTRY(x) //x
#define TABLE_SUPER_NOISY(x) //x
#define LOAD_TABLE_NOISY(x) //x
#define TABLE_THEME(x) //x

namespace android {

#ifdef HAVE_WINSOCK
#undef  nhtol
#undef  htonl

#ifdef HAVE_LITTLE_ENDIAN
#define ntohl(x)    ( ((x) << 24) | (((x) >> 24) & 255) | (((x) << 8) & 0xff0000) | (((x) >> 8) & 0xff00) )
#define htonl(x)    ntohl(x)
#define ntohs(x)    ( (((x) << 8) & 0xff00) | (((x) >> 8) & 255) )
#define htons(x)    ntohs(x)
#else
#define ntohl(x)    (x)
#define htonl(x)    (x)
#define ntohs(x)    (x)
#define htons(x)    (x)
#endif
#endif

#define IDMAP_MAGIC         0x706d6469
// size measured in sizeof(uint32_t)
#define IDMAP_HEADER_SIZE (ResTable::IDMAP_HEADER_SIZE_BYTES / sizeof(uint32_t))

static void printToLogFunc(void* cookie, const char* txt)
{
    ALOGV("%s", txt);
}

// Standard C isspace() is only required to look at the low byte of its input, so
// produces incorrect results for UTF-16 characters.  For safety's sake, assume that
// any high-byte UTF-16 code point is not whitespace.
inline int isspace16(char16_t c) {
    return (c < 0x0080 && isspace(c));
}

// range checked; guaranteed to NUL-terminate within the stated number of available slots
// NOTE: if this truncates the dst string due to running out of space, no attempt is
// made to avoid splitting surrogate pairs.
static void strcpy16_dtoh(uint16_t* dst, const uint16_t* src, size_t avail)
{
    uint16_t* last = dst + avail - 1;
    while (*src && (dst < last)) {
        char16_t s = dtohs(*src);
        *dst++ = s;
        src++;
    }
    *dst = 0;
}

static status_t validate_chunk(const ResChunk_header* chunk,
                               size_t minSize,
                               const uint8_t* dataEnd,
                               const char* name)
{
    const uint16_t headerSize = dtohs(chunk->headerSize);
    const uint32_t size = dtohl(chunk->size);

    if (headerSize >= minSize) {
        if (headerSize <= size) {
            if (((headerSize|size)&0x3) == 0) {
                if ((ssize_t)size <= (dataEnd-((const uint8_t*)chunk))) {
                    return NO_ERROR;
                }
                ALOGW("%s data size %p extends beyond resource end %p.",
                     name, (void*)size,
                     (void*)(dataEnd-((const uint8_t*)chunk)));
                return BAD_TYPE;
            }
            ALOGW("%s size 0x%x or headerSize 0x%x is not on an integer boundary.",
                 name, (int)size, (int)headerSize);
            return BAD_TYPE;
        }
        ALOGW("%s size %p is smaller than header size %p.",
             name, (void*)size, (void*)(int)headerSize);
        return BAD_TYPE;
    }
    ALOGW("%s header size %p is too small.",
         name, (void*)(int)headerSize);
    return BAD_TYPE;
}

inline void Res_value::copyFrom_dtoh(const Res_value& src)
{
    size = dtohs(src.size);
    res0 = src.res0;
    dataType = src.dataType;
    data = dtohl(src.data);
}

void Res_png_9patch::deviceToFile()
{
    for (int i = 0; i < numXDivs; i++) {
        xDivs[i] = htonl(xDivs[i]);
    }
    for (int i = 0; i < numYDivs; i++) {
        yDivs[i] = htonl(yDivs[i]);
    }
    paddingLeft = htonl(paddingLeft);
    paddingRight = htonl(paddingRight);
    paddingTop = htonl(paddingTop);
    paddingBottom = htonl(paddingBottom);
    for (int i=0; i<numColors; i++) {
        colors[i] = htonl(colors[i]);
    }
}

void Res_png_9patch::fileToDevice()
{
    for (int i = 0; i < numXDivs; i++) {
        xDivs[i] = ntohl(xDivs[i]);
    }
    for (int i = 0; i < numYDivs; i++) {
        yDivs[i] = ntohl(yDivs[i]);
    }
    paddingLeft = ntohl(paddingLeft);
    paddingRight = ntohl(paddingRight);
    paddingTop = ntohl(paddingTop);
    paddingBottom = ntohl(paddingBottom);
    for (int i=0; i<numColors; i++) {
        colors[i] = ntohl(colors[i]);
    }
}

size_t Res_png_9patch::serializedSize()
{
    // The size of this struct is 32 bytes on the 32-bit target system
    // 4 * int8_t
    // 4 * int32_t
    // 3 * pointer
    return 32
            + numXDivs * sizeof(int32_t)
            + numYDivs * sizeof(int32_t)
            + numColors * sizeof(uint32_t);
}

void* Res_png_9patch::serialize()
{
    // Use calloc since we're going to leave a few holes in the data
    // and want this to run cleanly under valgrind
    void* newData = calloc(1, serializedSize());
    serialize(newData);
    return newData;
}

void Res_png_9patch::serialize(void * outData)
{
    char* data = (char*) outData;
    memmove(data, &wasDeserialized, 4);     // copy  wasDeserialized, numXDivs, numYDivs, numColors
    memmove(data + 12, &paddingLeft, 16);   // copy paddingXXXX
    data += 32;

    memmove(data, this->xDivs, numXDivs * sizeof(int32_t));
    data +=  numXDivs * sizeof(int32_t);
    memmove(data, this->yDivs, numYDivs * sizeof(int32_t));
    data +=  numYDivs * sizeof(int32_t);
    memmove(data, this->colors, numColors * sizeof(uint32_t));
}

static void deserializeInternal(const void* inData, Res_png_9patch* outData) {
    char* patch = (char*) inData;
    if (inData != outData) {
        memmove(&outData->wasDeserialized, patch, 4);     // copy  wasDeserialized, numXDivs, numYDivs, numColors
        memmove(&outData->paddingLeft, patch + 12, 4);     // copy  wasDeserialized, numXDivs, numYDivs, numColors
    }
    outData->wasDeserialized = true;
    char* data = (char*)outData;
    data +=  sizeof(Res_png_9patch);
    outData->xDivs = (int32_t*) data;
    data +=  outData->numXDivs * sizeof(int32_t);
    outData->yDivs = (int32_t*) data;
    data +=  outData->numYDivs * sizeof(int32_t);
    outData->colors = (uint32_t*) data;
}

static bool assertIdmapHeader(const uint32_t* map, size_t sizeBytes)
{
    if (sizeBytes < ResTable::IDMAP_HEADER_SIZE_BYTES) {
        ALOGW("idmap assertion failed: size=%d bytes\n", (int)sizeBytes);
        return false;
    }
    if (*map != htodl(IDMAP_MAGIC)) { // htodl: map data expected to be in correct endianess
        ALOGW("idmap assertion failed: invalid magic found (is 0x%08x, expected 0x%08x)\n",
             *map, htodl(IDMAP_MAGIC));
        return false;
    }
    return true;
}

static status_t idmapLookup(const uint32_t* map, size_t sizeBytes, uint32_t key, uint32_t* outValue)
{
    // see README for details on the format of map
    if (!assertIdmapHeader(map, sizeBytes)) {
        return UNKNOWN_ERROR;
    }
    map = map + IDMAP_HEADER_SIZE; // skip ahead to data segment
    // size of data block, in uint32_t
    const size_t size = (sizeBytes - ResTable::IDMAP_HEADER_SIZE_BYTES) / sizeof(uint32_t);
    const uint32_t type = Res_GETTYPE(key) + 1; // add one, idmap stores "public" type id
    const uint32_t entry = Res_GETENTRY(key);
    const uint32_t typeCount = *map;

    if (type > typeCount) {
        ALOGW("Resource ID map: type=%d exceeds number of types=%d\n", type, typeCount);
        return UNKNOWN_ERROR;
    }
    if (typeCount > size) {
        ALOGW("Resource ID map: number of types=%d exceeds size of map=%d\n", typeCount, (int)size);
        return UNKNOWN_ERROR;
    }
    const uint32_t typeOffset = map[type];
    if (typeOffset == 0) {
        *outValue = 0;
        return NO_ERROR;
    }
    if (typeOffset + 1 > size) {
        ALOGW("Resource ID map: type offset=%d exceeds reasonable value, size of map=%d\n",
             typeOffset, (int)size);
        return UNKNOWN_ERROR;
    }
    const uint32_t entryCount = map[typeOffset];
    const uint32_t entryOffset = map[typeOffset + 1];
    if (entryCount == 0 || entry < entryOffset || entry - entryOffset > entryCount - 1) {
        *outValue = 0;
        return NO_ERROR;
    }
    const uint32_t index = typeOffset + 2 + entry - entryOffset;
    if (index > size) {
        ALOGW("Resource ID map: entry index=%d exceeds size of map=%d\n", index, (int)size);
        *outValue = 0;
        return NO_ERROR;
    }
    *outValue = map[index];

    return NO_ERROR;
}

static status_t getIdmapPackageId(const uint32_t* map, size_t mapSize, uint32_t *outId)
{
    if (!assertIdmapHeader(map, mapSize)) {
        return UNKNOWN_ERROR;
    }
    const uint32_t* p = map + IDMAP_HEADER_SIZE + 1;
    while (*p == 0) {
        ++p;
    }
    *outId = (map[*p + IDMAP_HEADER_SIZE + 2] >> 24) & 0x000000ff;
    return NO_ERROR;
}

Res_png_9patch* Res_png_9patch::deserialize(const void* inData)
{
    if (sizeof(void*) != sizeof(int32_t)) {
        ALOGE("Cannot deserialize on non 32-bit system\n");
        return NULL;
    }
    deserializeInternal(inData, (Res_png_9patch*) inData);
    return (Res_png_9patch*) inData;
}

// --------------------------------------------------------------------
// --------------------------------------------------------------------
// --------------------------------------------------------------------

ResStringPool::ResStringPool()
    : mError(NO_INIT), mOwnedData(NULL), mHeader(NULL), mCache(NULL)
{
}

ResStringPool::ResStringPool(const void* data, size_t size, bool copyData)
    : mError(NO_INIT), mOwnedData(NULL), mHeader(NULL), mCache(NULL)
{
    setTo(data, size, copyData);
}

ResStringPool::~ResStringPool()
{
    uninit();
}

status_t ResStringPool::setTo(const void* data, size_t size, bool copyData)
{
    if (!data || !size) {
        return (mError=BAD_TYPE);
    }

    uninit();

    const bool notDeviceEndian = htods(0xf0) != 0xf0;

    if (copyData || notDeviceEndian) {
        mOwnedData = malloc(size);
        if (mOwnedData == NULL) {
            return (mError=NO_MEMORY);
        }
        memcpy(mOwnedData, data, size);
        data = mOwnedData;
    }

    mHeader = (const ResStringPool_header*)data;

    if (notDeviceEndian) {
        ResStringPool_header* h = const_cast<ResStringPool_header*>(mHeader);
        h->header.headerSize = dtohs(mHeader->header.headerSize);
        h->header.type = dtohs(mHeader->header.type);
        h->header.size = dtohl(mHeader->header.size);
        h->stringCount = dtohl(mHeader->stringCount);
        h->styleCount = dtohl(mHeader->styleCount);
        h->flags = dtohl(mHeader->flags);
        h->stringsStart = dtohl(mHeader->stringsStart);
        h->stylesStart = dtohl(mHeader->stylesStart);
    }

    if (mHeader->header.headerSize > mHeader->header.size
            || mHeader->header.size > size) {
        ALOGW("Bad string block: header size %d or total size %d is larger than data size %d\n",
                (int)mHeader->header.headerSize, (int)mHeader->header.size, (int)size);
        return (mError=BAD_TYPE);
    }
    mSize = mHeader->header.size;
    mEntries = (const uint32_t*)
        (((const uint8_t*)data)+mHeader->header.headerSize);

    if (mHeader->stringCount > 0) {
        if ((mHeader->stringCount*sizeof(uint32_t) < mHeader->stringCount)  // uint32 overflow?
            || (mHeader->header.headerSize+(mHeader->stringCount*sizeof(uint32_t)))
                > size) {
            ALOGW("Bad string block: entry of %d items extends past data size %d\n",
                    (int)(mHeader->header.headerSize+(mHeader->stringCount*sizeof(uint32_t))),
                    (int)size);
            return (mError=BAD_TYPE);
        }

        size_t charSize;
        if (mHeader->flags&ResStringPool_header::UTF8_FLAG) {
            charSize = sizeof(uint8_t);
            mCache = (char16_t**)calloc(mHeader->stringCount, sizeof(char16_t**));
        } else {
            charSize = sizeof(char16_t);
        }

        mStrings = (const void*)
            (((const uint8_t*)data)+mHeader->stringsStart);
        if (mHeader->stringsStart >= (mHeader->header.size-sizeof(uint16_t))) {
            ALOGW("Bad string block: string pool starts at %d, after total size %d\n",
                    (int)mHeader->stringsStart, (int)mHeader->header.size);
            return (mError=BAD_TYPE);
        }
        if (mHeader->styleCount == 0) {
            mStringPoolSize =
                (mHeader->header.size-mHeader->stringsStart)/charSize;
        } else {
            // check invariant: styles starts before end of data
            if (mHeader->stylesStart >= (mHeader->header.size-sizeof(uint16_t))) {
                ALOGW("Bad style block: style block starts at %d past data size of %d\n",
                    (int)mHeader->stylesStart, (int)mHeader->header.size);
                return (mError=BAD_TYPE);
            }
            // check invariant: styles follow the strings
            if (mHeader->stylesStart <= mHeader->stringsStart) {
                ALOGW("Bad style block: style block starts at %d, before strings at %d\n",
                    (int)mHeader->stylesStart, (int)mHeader->stringsStart);
                return (mError=BAD_TYPE);
            }
            mStringPoolSize =
                (mHeader->stylesStart-mHeader->stringsStart)/charSize;
        }

        // check invariant: stringCount > 0 requires a string pool to exist
        if (mStringPoolSize == 0) {
            ALOGW("Bad string block: stringCount is %d but pool size is 0\n", (int)mHeader->stringCount);
            return (mError=BAD_TYPE);
        }

        if (notDeviceEndian) {
            size_t i;
            uint32_t* e = const_cast<uint32_t*>(mEntries);
            for (i=0; i<mHeader->stringCount; i++) {
                e[i] = dtohl(mEntries[i]);
            }
            if (!(mHeader->flags&ResStringPool_header::UTF8_FLAG)) {
                const char16_t* strings = (const char16_t*)mStrings;
                char16_t* s = const_cast<char16_t*>(strings);
                for (i=0; i<mStringPoolSize; i++) {
                    s[i] = dtohs(strings[i]);
                }
            }
        }

        if ((mHeader->flags&ResStringPool_header::UTF8_FLAG &&
                ((uint8_t*)mStrings)[mStringPoolSize-1] != 0) ||
                (!mHeader->flags&ResStringPool_header::UTF8_FLAG &&
                ((char16_t*)mStrings)[mStringPoolSize-1] != 0)) {
            ALOGW("Bad string block: last string is not 0-terminated\n");
            return (mError=BAD_TYPE);
        }
    } else {
        mStrings = NULL;
        mStringPoolSize = 0;
    }

    if (mHeader->styleCount > 0) {
        mEntryStyles = mEntries + mHeader->stringCount;
        // invariant: integer overflow in calculating mEntryStyles
        if (mEntryStyles < mEntries) {
            ALOGW("Bad string block: integer overflow finding styles\n");
            return (mError=BAD_TYPE);
        }

        if (((const uint8_t*)mEntryStyles-(const uint8_t*)mHeader) > (int)size) {
            ALOGW("Bad string block: entry of %d styles extends past data size %d\n",
                    (int)((const uint8_t*)mEntryStyles-(const uint8_t*)mHeader),
                    (int)size);
            return (mError=BAD_TYPE);
        }
        mStyles = (const uint32_t*)
            (((const uint8_t*)data)+mHeader->stylesStart);
        if (mHeader->stylesStart >= mHeader->header.size) {
            ALOGW("Bad string block: style pool starts %d, after total size %d\n",
                    (int)mHeader->stylesStart, (int)mHeader->header.size);
            return (mError=BAD_TYPE);
        }
        mStylePoolSize =
            (mHeader->header.size-mHeader->stylesStart)/sizeof(uint32_t);

        if (notDeviceEndian) {
            size_t i;
            uint32_t* e = const_cast<uint32_t*>(mEntryStyles);
            for (i=0; i<mHeader->styleCount; i++) {
                e[i] = dtohl(mEntryStyles[i]);
            }
            uint32_t* s = const_cast<uint32_t*>(mStyles);
            for (i=0; i<mStylePoolSize; i++) {
                s[i] = dtohl(mStyles[i]);
            }
        }

        const ResStringPool_span endSpan = {
            { htodl(ResStringPool_span::END) },
            htodl(ResStringPool_span::END), htodl(ResStringPool_span::END)
        };
        if (memcmp(&mStyles[mStylePoolSize-(sizeof(endSpan)/sizeof(uint32_t))],
                   &endSpan, sizeof(endSpan)) != 0) {
            ALOGW("Bad string block: last style is not 0xFFFFFFFF-terminated\n");
            return (mError=BAD_TYPE);
        }
    } else {
        mEntryStyles = NULL;
        mStyles = NULL;
        mStylePoolSize = 0;
    }

    return (mError=NO_ERROR);
}

status_t ResStringPool::getError() const
{
    return mError;
}

void ResStringPool::uninit()
{
    mError = NO_INIT;
    if (mOwnedData) {
        free(mOwnedData);
        mOwnedData = NULL;
    }
    if (mHeader != NULL && mCache != NULL) {
        for (size_t x = 0; x < mHeader->stringCount; x++) {
            if (mCache[x] != NULL) {
                free(mCache[x]);
                mCache[x] = NULL;
            }
        }
        free(mCache);
        mCache = NULL;
    }
}

/**
 * Strings in UTF-16 format have length indicated by a length encoded in the
 * stored data. It is either 1 or 2 characters of length data. This allows a
 * maximum length of 0x7FFFFFF (2147483647 bytes), but if you're storing that
 * much data in a string, you're abusing them.
 *
 * If the high bit is set, then there are two characters or 4 bytes of length
 * data encoded. In that case, drop the high bit of the first character and
 * add it together with the next character.
 */
static inline size_t
decodeLength(const char16_t** str)
{
    size_t len = **str;
    if ((len & 0x8000) != 0) {
        (*str)++;
        len = ((len & 0x7FFF) << 16) | **str;
    }
    (*str)++;
    return len;
}

/**
 * Strings in UTF-8 format have length indicated by a length encoded in the
 * stored data. It is either 1 or 2 characters of length data. This allows a
 * maximum length of 0x7FFF (32767 bytes), but you should consider storing
 * text in another way if you're using that much data in a single string.
 *
 * If the high bit is set, then there are two characters or 2 bytes of length
 * data encoded. In that case, drop the high bit of the first character and
 * add it together with the next character.
 */
static inline size_t
decodeLength(const uint8_t** str)
{
    size_t len = **str;
    if ((len & 0x80) != 0) {
        (*str)++;
        len = ((len & 0x7F) << 8) | **str;
    }
    (*str)++;
    return len;
}

const uint16_t* ResStringPool::stringAt(size_t idx, size_t* u16len) const
{
    if (mError == NO_ERROR && idx < mHeader->stringCount) {
        const bool isUTF8 = (mHeader->flags&ResStringPool_header::UTF8_FLAG) != 0;
        const uint32_t off = mEntries[idx]/(isUTF8?sizeof(char):sizeof(char16_t));
        if (off < (mStringPoolSize-1)) {
            if (!isUTF8) {
                const char16_t* strings = (char16_t*)mStrings;
                const char16_t* str = strings+off;

                *u16len = decodeLength(&str);
                if ((uint32_t)(str+*u16len-strings) < mStringPoolSize) {
                    return str;
                } else {
                    ALOGW("Bad string block: string #%d extends to %d, past end at %d\n",
                            (int)idx, (int)(str+*u16len-strings), (int)mStringPoolSize);
                }
            } else {
                const uint8_t* strings = (uint8_t*)mStrings;
                const uint8_t* u8str = strings+off;

                *u16len = decodeLength(&u8str);
                size_t u8len = decodeLength(&u8str);

                // encLen must be less than 0x7FFF due to encoding.
                if ((uint32_t)(u8str+u8len-strings) < mStringPoolSize) {
                    AutoMutex lock(mDecodeLock);

                    if (mCache[idx] != NULL) {
                        return mCache[idx];
                    }

                    ssize_t actualLen = utf8_to_utf16_length(u8str, u8len);
                    if (actualLen < 0 || (size_t)actualLen != *u16len) {
                        ALOGW("Bad string block: string #%lld decoded length is not correct "
                                "%lld vs %llu\n",
                                (long long)idx, (long long)actualLen, (long long)*u16len);
                        return NULL;
                    }

                    char16_t *u16str = (char16_t *)calloc(*u16len+1, sizeof(char16_t));
                    if (!u16str) {
                        ALOGW("No memory when trying to allocate decode cache for string #%d\n",
                                (int)idx);
                        return NULL;
                    }

                    utf8_to_utf16(u8str, u8len, u16str);
                    mCache[idx] = u16str;
                    return u16str;
                } else {
                    ALOGW("Bad string block: string #%lld extends to %lld, past end at %lld\n",
                            (long long)idx, (long long)(u8str+u8len-strings),
                            (long long)mStringPoolSize);
                }
            }
        } else {
            ALOGW("Bad string block: string #%d entry is at %d, past end at %d\n",
                    (int)idx, (int)(off*sizeof(uint16_t)),
                    (int)(mStringPoolSize*sizeof(uint16_t)));
        }
    }
    return NULL;
}

const char* ResStringPool::string8At(size_t idx, size_t* outLen) const
{
    if (mError == NO_ERROR && idx < mHeader->stringCount) {
        const bool isUTF8 = (mHeader->flags&ResStringPool_header::UTF8_FLAG) != 0;
        const uint32_t off = mEntries[idx]/(isUTF8?sizeof(char):sizeof(char16_t));
        if (off < (mStringPoolSize-1)) {
            if (isUTF8) {
                const uint8_t* strings = (uint8_t*)mStrings;
                const uint8_t* str = strings+off;
                *outLen = decodeLength(&str);
                size_t encLen = decodeLength(&str);
                if ((uint32_t)(str+encLen-strings) < mStringPoolSize) {
                    return (const char*)str;
                } else {
                    ALOGW("Bad string block: string #%d extends to %d, past end at %d\n",
                            (int)idx, (int)(str+encLen-strings), (int)mStringPoolSize);
                }
            }
        } else {
            ALOGW("Bad string block: string #%d entry is at %d, past end at %d\n",
                    (int)idx, (int)(off*sizeof(uint16_t)),
                    (int)(mStringPoolSize*sizeof(uint16_t)));
        }
    }
    return NULL;
}

const String8 ResStringPool::string8ObjectAt(size_t idx) const
{
    size_t len;
    const char *str = (const char*)string8At(idx, &len);
    if (str != NULL) {
        return String8(str);
    }
    return String8(stringAt(idx, &len));
}

const ResStringPool_span* ResStringPool::styleAt(const ResStringPool_ref& ref) const
{
    return styleAt(ref.index);
}

const ResStringPool_span* ResStringPool::styleAt(size_t idx) const
{
    if (mError == NO_ERROR && idx < mHeader->styleCount) {
        const uint32_t off = (mEntryStyles[idx]/sizeof(uint32_t));
        if (off < mStylePoolSize) {
            return (const ResStringPool_span*)(mStyles+off);
        } else {
            ALOGW("Bad string block: style #%d entry is at %d, past end at %d\n",
                    (int)idx, (int)(off*sizeof(uint32_t)),
                    (int)(mStylePoolSize*sizeof(uint32_t)));
        }
    }
    return NULL;
}

ssize_t ResStringPool::indexOfString(const char16_t* str, size_t strLen) const
{
    if (mError != NO_ERROR) {
        return mError;
    }

    size_t len;

    // TODO optimize searching for UTF-8 strings taking into account
    // the cache fill to determine when to convert the searched-for
    // string key to UTF-8.

    if (mHeader->flags&ResStringPool_header::SORTED_FLAG) {
        // Do a binary search for the string...
        ssize_t l = 0;
        ssize_t h = mHeader->stringCount-1;

        ssize_t mid;
        while (l <= h) {
            mid = l + (h - l)/2;
            const char16_t* s = stringAt(mid, &len);
            int c = s ? strzcmp16(s, len, str, strLen) : -1;
            POOL_NOISY(printf("Looking for %s, at %s, cmp=%d, l/mid/h=%d/%d/%d\n",
                         String8(str).string(),
                         String8(s).string(),
                         c, (int)l, (int)mid, (int)h));
            if (c == 0) {
                return mid;
            } else if (c < 0) {
                l = mid + 1;
            } else {
                h = mid - 1;
            }
        }
    } else {
        // It is unusual to get the ID from an unsorted string block...
        // most often this happens because we want to get IDs for style
        // span tags; since those always appear at the end of the string
        // block, start searching at the back.
        for (int i=mHeader->stringCount-1; i>=0; i--) {
            const char16_t* s = stringAt(i, &len);
            POOL_NOISY(printf("Looking for %s, at %s, i=%d\n",
                         String8(str, strLen).string(),
                         String8(s).string(),
                         i));
            if (s && strzcmp16(s, len, str, strLen) == 0) {
                return i;
            }
        }
    }

    return NAME_NOT_FOUND;
}

size_t ResStringPool::size() const
{
    return (mError == NO_ERROR) ? mHeader->stringCount : 0;
}

size_t ResStringPool::styleCount() const
{
    return (mError == NO_ERROR) ? mHeader->styleCount : 0;
}

size_t ResStringPool::bytes() const
{
    return (mError == NO_ERROR) ? mHeader->header.size : 0;
}

bool ResStringPool::isSorted() const
{
    return (mHeader->flags&ResStringPool_header::SORTED_FLAG)!=0;
}

bool ResStringPool::isUTF8() const
{
    return (mHeader->flags&ResStringPool_header::UTF8_FLAG)!=0;
}

// --------------------------------------------------------------------
// --------------------------------------------------------------------
// --------------------------------------------------------------------

ResXMLParser::ResXMLParser(const ResXMLTree& tree)
    : mTree(tree), mEventCode(BAD_DOCUMENT)
{
}

void ResXMLParser::restart()
{
    mCurNode = NULL;
    mEventCode = mTree.mError == NO_ERROR ? START_DOCUMENT : BAD_DOCUMENT;
}
const ResStringPool& ResXMLParser::getStrings() const
{
    return mTree.mStrings;
}

ResXMLParser::event_code_t ResXMLParser::getEventType() const
{
    return mEventCode;
}

ResXMLParser::event_code_t ResXMLParser::next()
{
    if (mEventCode == START_DOCUMENT) {
        mCurNode = mTree.mRootNode;
        mCurExt = mTree.mRootExt;
        return (mEventCode=mTree.mRootCode);
    } else if (mEventCode >= FIRST_CHUNK_CODE) {
        return nextNode();
    }
    return mEventCode;
}

int32_t ResXMLParser::getCommentID() const
{
    return mCurNode != NULL ? dtohl(mCurNode->comment.index) : -1;
}

const uint16_t* ResXMLParser::getComment(size_t* outLen) const
{
    int32_t id = getCommentID();
    return id >= 0 ? mTree.mStrings.stringAt(id, outLen) : NULL;
}

uint32_t ResXMLParser::getLineNumber() const
{
    return mCurNode != NULL ? dtohl(mCurNode->lineNumber) : -1;
}

int32_t ResXMLParser::getTextID() const
{
    if (mEventCode == TEXT) {
        return dtohl(((const ResXMLTree_cdataExt*)mCurExt)->data.index);
    }
    return -1;
}

const uint16_t* ResXMLParser::getText(size_t* outLen) const
{
    int32_t id = getTextID();
    return id >= 0 ? mTree.mStrings.stringAt(id, outLen) : NULL;
}

ssize_t ResXMLParser::getTextValue(Res_value* outValue) const
{
    if (mEventCode == TEXT) {
        outValue->copyFrom_dtoh(((const ResXMLTree_cdataExt*)mCurExt)->typedData);
        return sizeof(Res_value);
    }
    return BAD_TYPE;
}

int32_t ResXMLParser::getNamespacePrefixID() const
{
    if (mEventCode == START_NAMESPACE || mEventCode == END_NAMESPACE) {
        return dtohl(((const ResXMLTree_namespaceExt*)mCurExt)->prefix.index);
    }
    return -1;
}

const uint16_t* ResXMLParser::getNamespacePrefix(size_t* outLen) const
{
    int32_t id = getNamespacePrefixID();
    //printf("prefix=%d  event=%p\n", id, mEventCode);
    return id >= 0 ? mTree.mStrings.stringAt(id, outLen) : NULL;
}

int32_t ResXMLParser::getNamespaceUriID() const
{
    if (mEventCode == START_NAMESPACE || mEventCode == END_NAMESPACE) {
        return dtohl(((const ResXMLTree_namespaceExt*)mCurExt)->uri.index);
    }
    return -1;
}

const uint16_t* ResXMLParser::getNamespaceUri(size_t* outLen) const
{
    int32_t id = getNamespaceUriID();
    //printf("uri=%d  event=%p\n", id, mEventCode);
    return id >= 0 ? mTree.mStrings.stringAt(id, outLen) : NULL;
}

int32_t ResXMLParser::getElementNamespaceID() const
{
    if (mEventCode == START_TAG) {
        return dtohl(((const ResXMLTree_attrExt*)mCurExt)->ns.index);
    }
    if (mEventCode == END_TAG) {
        return dtohl(((const ResXMLTree_endElementExt*)mCurExt)->ns.index);
    }
    return -1;
}

const uint16_t* ResXMLParser::getElementNamespace(size_t* outLen) const
{
    int32_t id = getElementNamespaceID();
    return id >= 0 ? mTree.mStrings.stringAt(id, outLen) : NULL;
}

int32_t ResXMLParser::getElementNameID() const
{
    if (mEventCode == START_TAG) {
        return dtohl(((const ResXMLTree_attrExt*)mCurExt)->name.index);
    }
    if (mEventCode == END_TAG) {
        return dtohl(((const ResXMLTree_endElementExt*)mCurExt)->name.index);
    }
    return -1;
}

const uint16_t* ResXMLParser::getElementName(size_t* outLen) const
{
    int32_t id = getElementNameID();
    return id >= 0 ? mTree.mStrings.stringAt(id, outLen) : NULL;
}

size_t ResXMLParser::getAttributeCount() const
{
    if (mEventCode == START_TAG) {
        return dtohs(((const ResXMLTree_attrExt*)mCurExt)->attributeCount);
    }
    return 0;
}

int32_t ResXMLParser::getAttributeNamespaceID(size_t idx) const
{
    if (mEventCode == START_TAG) {
        const ResXMLTree_attrExt* tag = (const ResXMLTree_attrExt*)mCurExt;
        if (idx < dtohs(tag->attributeCount)) {
            const ResXMLTree_attribute* attr = (const ResXMLTree_attribute*)
                (((const uint8_t*)tag)
                 + dtohs(tag->attributeStart)
                 + (dtohs(tag->attributeSize)*idx));
            return dtohl(attr->ns.index);
        }
    }
    return -2;
}

const uint16_t* ResXMLParser::getAttributeNamespace(size_t idx, size_t* outLen) const
{
    int32_t id = getAttributeNamespaceID(idx);
    //printf("attribute namespace=%d  idx=%d  event=%p\n", id, idx, mEventCode);
    //XML_NOISY(printf("getAttributeNamespace 0x%x=0x%x\n", idx, id));
    return id >= 0 ? mTree.mStrings.stringAt(id, outLen) : NULL;
}

int32_t ResXMLParser::getAttributeNameID(size_t idx) const
{
    if (mEventCode == START_TAG) {
        const ResXMLTree_attrExt* tag = (const ResXMLTree_attrExt*)mCurExt;
        if (idx < dtohs(tag->attributeCount)) {
            const ResXMLTree_attribute* attr = (const ResXMLTree_attribute*)
                (((const uint8_t*)tag)
                 + dtohs(tag->attributeStart)
                 + (dtohs(tag->attributeSize)*idx));
            return dtohl(attr->name.index);
        }
    }
    return -1;
}

const uint16_t* ResXMLParser::getAttributeName(size_t idx, size_t* outLen) const
{
    int32_t id = getAttributeNameID(idx);
    //printf("attribute name=%d  idx=%d  event=%p\n", id, idx, mEventCode);
    //XML_NOISY(printf("getAttributeName 0x%x=0x%x\n", idx, id));
    return id >= 0 ? mTree.mStrings.stringAt(id, outLen) : NULL;
}

uint32_t ResXMLParser::getAttributeNameResID(size_t idx) const
{
    int32_t id = getAttributeNameID(idx);
    if (id >= 0 && (size_t)id < mTree.mNumResIds) {
        return dtohl(mTree.mResIds[id]);
    }
    return 0;
}

int32_t ResXMLParser::getAttributeValueStringID(size_t idx) const
{
    if (mEventCode == START_TAG) {
        const ResXMLTree_attrExt* tag = (const ResXMLTree_attrExt*)mCurExt;
        if (idx < dtohs(tag->attributeCount)) {
            const ResXMLTree_attribute* attr = (const ResXMLTree_attribute*)
                (((const uint8_t*)tag)
                 + dtohs(tag->attributeStart)
                 + (dtohs(tag->attributeSize)*idx));
            return dtohl(attr->rawValue.index);
        }
    }
    return -1;
}

const uint16_t* ResXMLParser::getAttributeStringValue(size_t idx, size_t* outLen) const
{
    int32_t id = getAttributeValueStringID(idx);
    //XML_NOISY(printf("getAttributeValue 0x%x=0x%x\n", idx, id));
    return id >= 0 ? mTree.mStrings.stringAt(id, outLen) : NULL;
}

int32_t ResXMLParser::getAttributeDataType(size_t idx) const
{
    if (mEventCode == START_TAG) {
        const ResXMLTree_attrExt* tag = (const ResXMLTree_attrExt*)mCurExt;
        if (idx < dtohs(tag->attributeCount)) {
            const ResXMLTree_attribute* attr = (const ResXMLTree_attribute*)
                (((const uint8_t*)tag)
                 + dtohs(tag->attributeStart)
                 + (dtohs(tag->attributeSize)*idx));
            return attr->typedValue.dataType;
        }
    }
    return Res_value::TYPE_NULL;
}

int32_t ResXMLParser::getAttributeData(size_t idx) const
{
    if (mEventCode == START_TAG) {
        const ResXMLTree_attrExt* tag = (const ResXMLTree_attrExt*)mCurExt;
        if (idx < dtohs(tag->attributeCount)) {
            const ResXMLTree_attribute* attr = (const ResXMLTree_attribute*)
                (((const uint8_t*)tag)
                 + dtohs(tag->attributeStart)
                 + (dtohs(tag->attributeSize)*idx));
            return dtohl(attr->typedValue.data);
        }
    }
    return 0;
}

ssize_t ResXMLParser::getAttributeValue(size_t idx, Res_value* outValue) const
{
    if (mEventCode == START_TAG) {
        const ResXMLTree_attrExt* tag = (const ResXMLTree_attrExt*)mCurExt;
        if (idx < dtohs(tag->attributeCount)) {
            const ResXMLTree_attribute* attr = (const ResXMLTree_attribute*)
                (((const uint8_t*)tag)
                 + dtohs(tag->attributeStart)
                 + (dtohs(tag->attributeSize)*idx));
            outValue->copyFrom_dtoh(attr->typedValue);
            return sizeof(Res_value);
        }
    }
    return BAD_TYPE;
}

ssize_t ResXMLParser::indexOfAttribute(const char* ns, const char* attr) const
{
    String16 nsStr(ns != NULL ? ns : "");
    String16 attrStr(attr);
    return indexOfAttribute(ns ? nsStr.string() : NULL, ns ? nsStr.size() : 0,
                            attrStr.string(), attrStr.size());
}

ssize_t ResXMLParser::indexOfAttribute(const char16_t* ns, size_t nsLen,
                                       const char16_t* attr, size_t attrLen) const
{
    if (mEventCode == START_TAG) {
        const size_t N = getAttributeCount();
        for (size_t i=0; i<N; i++) {
            size_t curNsLen, curAttrLen;
            const char16_t* curNs = getAttributeNamespace(i, &curNsLen);
            const char16_t* curAttr = getAttributeName(i, &curAttrLen);
            //printf("%d: ns=%p attr=%p curNs=%p curAttr=%p\n",
            //       i, ns, attr, curNs, curAttr);
            //printf(" --> attr=%s, curAttr=%s\n",
            //       String8(attr).string(), String8(curAttr).string());
            if (attr && curAttr && (strzcmp16(attr, attrLen, curAttr, curAttrLen) == 0)) {
                if (ns == NULL) {
                    if (curNs == NULL) return i;
                } else if (curNs != NULL) {
                    //printf(" --> ns=%s, curNs=%s\n",
                    //       String8(ns).string(), String8(curNs).string());
                    if (strzcmp16(ns, nsLen, curNs, curNsLen) == 0) return i;
                }
            }
        }
    }

    return NAME_NOT_FOUND;
}

ssize_t ResXMLParser::indexOfID() const
{
    if (mEventCode == START_TAG) {
        const ssize_t idx = dtohs(((const ResXMLTree_attrExt*)mCurExt)->idIndex);
        if (idx > 0) return (idx-1);
    }
    return NAME_NOT_FOUND;
}

ssize_t ResXMLParser::indexOfClass() const
{
    if (mEventCode == START_TAG) {
        const ssize_t idx = dtohs(((const ResXMLTree_attrExt*)mCurExt)->classIndex);
        if (idx > 0) return (idx-1);
    }
    return NAME_NOT_FOUND;
}

ssize_t ResXMLParser::indexOfStyle() const
{
    if (mEventCode == START_TAG) {
        const ssize_t idx = dtohs(((const ResXMLTree_attrExt*)mCurExt)->styleIndex);
        if (idx > 0) return (idx-1);
    }
    return NAME_NOT_FOUND;
}

ResXMLParser::event_code_t ResXMLParser::nextNode()
{
    if (mEventCode < 0) {
        return mEventCode;
    }

    do {
        const ResXMLTree_node* next = (const ResXMLTree_node*)
            (((const uint8_t*)mCurNode) + dtohl(mCurNode->header.size));
        //ALOGW("Next node: prev=%p, next=%p\n", mCurNode, next);
        
        if (((const uint8_t*)next) >= mTree.mDataEnd) {
            mCurNode = NULL;
            return (mEventCode=END_DOCUMENT);
        }

        if (mTree.validateNode(next) != NO_ERROR) {
            mCurNode = NULL;
            return (mEventCode=BAD_DOCUMENT);
        }

        mCurNode = next;
        const uint16_t headerSize = dtohs(next->header.headerSize);
        const uint32_t totalSize = dtohl(next->header.size);
        mCurExt = ((const uint8_t*)next) + headerSize;
        size_t minExtSize = 0;
        event_code_t eventCode = (event_code_t)dtohs(next->header.type);
        switch ((mEventCode=eventCode)) {
            case RES_XML_START_NAMESPACE_TYPE:
            case RES_XML_END_NAMESPACE_TYPE:
                minExtSize = sizeof(ResXMLTree_namespaceExt);
                break;
            case RES_XML_START_ELEMENT_TYPE:
                minExtSize = sizeof(ResXMLTree_attrExt);
                break;
            case RES_XML_END_ELEMENT_TYPE:
                minExtSize = sizeof(ResXMLTree_endElementExt);
                break;
            case RES_XML_CDATA_TYPE:
                minExtSize = sizeof(ResXMLTree_cdataExt);
                break;
            default:
                ALOGW("Unknown XML block: header type %d in node at %d\n",
                     (int)dtohs(next->header.type),
                     (int)(((const uint8_t*)next)-((const uint8_t*)mTree.mHeader)));
                continue;
        }
        
        if ((totalSize-headerSize) < minExtSize) {
            ALOGW("Bad XML block: header type 0x%x in node at 0x%x has size %d, need %d\n",
                 (int)dtohs(next->header.type),
                 (int)(((const uint8_t*)next)-((const uint8_t*)mTree.mHeader)),
                 (int)(totalSize-headerSize), (int)minExtSize);
            return (mEventCode=BAD_DOCUMENT);
        }
        
        //printf("CurNode=%p, CurExt=%p, headerSize=%d, minExtSize=%d\n",
        //       mCurNode, mCurExt, headerSize, minExtSize);
        
        return eventCode;
    } while (true);
}

void ResXMLParser::getPosition(ResXMLParser::ResXMLPosition* pos) const
{
    pos->eventCode = mEventCode;
    pos->curNode = mCurNode;
    pos->curExt = mCurExt;
}

void ResXMLParser::setPosition(const ResXMLParser::ResXMLPosition& pos)
{
    mEventCode = pos.eventCode;
    mCurNode = pos.curNode;
    mCurExt = pos.curExt;
}


// --------------------------------------------------------------------

static volatile int32_t gCount = 0;

ResXMLTree::ResXMLTree()
    : ResXMLParser(*this)
    , mError(NO_INIT), mOwnedData(NULL)
{
    //ALOGI("Creating ResXMLTree %p #%d\n", this, android_atomic_inc(&gCount)+1);
    restart();
}

ResXMLTree::ResXMLTree(const void* data, size_t size, bool copyData)
    : ResXMLParser(*this)
    , mError(NO_INIT), mOwnedData(NULL)
{
    //ALOGI("Creating ResXMLTree %p #%d\n", this, android_atomic_inc(&gCount)+1);
    setTo(data, size, copyData);
}

ResXMLTree::~ResXMLTree()
{
    //ALOGI("Destroying ResXMLTree in %p #%d\n", this, android_atomic_dec(&gCount)-1);
    uninit();
}

status_t ResXMLTree::setTo(const void* data, size_t size, bool copyData)
{
    uninit();
    mEventCode = START_DOCUMENT;

    if (copyData) {
        mOwnedData = malloc(size);
        if (mOwnedData == NULL) {
            return (mError=NO_MEMORY);
        }
        memcpy(mOwnedData, data, size);
        data = mOwnedData;
    }

    mHeader = (const ResXMLTree_header*)data;
    mSize = dtohl(mHeader->header.size);
    if (dtohs(mHeader->header.headerSize) > mSize || mSize > size) {
        ALOGW("Bad XML block: header size %d or total size %d is larger than data size %d\n",
             (int)dtohs(mHeader->header.headerSize),
             (int)dtohl(mHeader->header.size), (int)size);
        mError = BAD_TYPE;
        restart();
        return mError;
    }
    mDataEnd = ((const uint8_t*)mHeader) + mSize;

    mStrings.uninit();
    mRootNode = NULL;
    mResIds = NULL;
    mNumResIds = 0;

    // First look for a couple interesting chunks: the string block
    // and first XML node.
    const ResChunk_header* chunk =
        (const ResChunk_header*)(((const uint8_t*)mHeader) + dtohs(mHeader->header.headerSize));
    const ResChunk_header* lastChunk = chunk;
    while (((const uint8_t*)chunk) < (mDataEnd-sizeof(ResChunk_header)) &&
           ((const uint8_t*)chunk) < (mDataEnd-dtohl(chunk->size))) {
        status_t err = validate_chunk(chunk, sizeof(ResChunk_header), mDataEnd, "XML");
        if (err != NO_ERROR) {
            mError = err;
            goto done;
        }
        const uint16_t type = dtohs(chunk->type);
        const size_t size = dtohl(chunk->size);
        XML_NOISY(printf("Scanning @ %p: type=0x%x, size=0x%x\n",
                     (void*)(((uint32_t)chunk)-((uint32_t)mHeader)), type, size));
        if (type == RES_STRING_POOL_TYPE) {
            mStrings.setTo(chunk, size);
        } else if (type == RES_XML_RESOURCE_MAP_TYPE) {
            mResIds = (const uint32_t*)
                (((const uint8_t*)chunk)+dtohs(chunk->headerSize));
            mNumResIds = (dtohl(chunk->size)-dtohs(chunk->headerSize))/sizeof(uint32_t);
        } else if (type >= RES_XML_FIRST_CHUNK_TYPE
                   && type <= RES_XML_LAST_CHUNK_TYPE) {
            if (validateNode((const ResXMLTree_node*)chunk) != NO_ERROR) {
                mError = BAD_TYPE;
                goto done;
            }
            mCurNode = (const ResXMLTree_node*)lastChunk;
            if (nextNode() == BAD_DOCUMENT) {
                mError = BAD_TYPE;
                goto done;
            }
            mRootNode = mCurNode;
            mRootExt = mCurExt;
            mRootCode = mEventCode;
            break;
        } else {
            XML_NOISY(printf("Skipping unknown chunk!\n"));
        }
        lastChunk = chunk;
        chunk = (const ResChunk_header*)
            (((const uint8_t*)chunk) + size);
    }

    if (mRootNode == NULL) {
        ALOGW("Bad XML block: no root element node found\n");
        mError = BAD_TYPE;
        goto done;
    }

    mError = mStrings.getError();

done:
    restart();
    return mError;
}

status_t ResXMLTree::getError() const
{
    return mError;
}

void ResXMLTree::uninit()
{
    mError = NO_INIT;
    mStrings.uninit();
    if (mOwnedData) {
        free(mOwnedData);
        mOwnedData = NULL;
    }
    restart();
}

status_t ResXMLTree::validateNode(const ResXMLTree_node* node) const
{
    const uint16_t eventCode = dtohs(node->header.type);

    status_t err = validate_chunk(
        &node->header, sizeof(ResXMLTree_node),
        mDataEnd, "ResXMLTree_node");

    if (err >= NO_ERROR) {
        // Only perform additional validation on START nodes
        if (eventCode != RES_XML_START_ELEMENT_TYPE) {
            return NO_ERROR;
        }

        const uint16_t headerSize = dtohs(node->header.headerSize);
        const uint32_t size = dtohl(node->header.size);
        const ResXMLTree_attrExt* attrExt = (const ResXMLTree_attrExt*)
            (((const uint8_t*)node) + headerSize);
        // check for sensical values pulled out of the stream so far...
        if ((size >= headerSize + sizeof(ResXMLTree_attrExt))
                && ((void*)attrExt > (void*)node)) {
            const size_t attrSize = ((size_t)dtohs(attrExt->attributeSize))
                * dtohs(attrExt->attributeCount);
            if ((dtohs(attrExt->attributeStart)+attrSize) <= (size-headerSize)) {
                return NO_ERROR;
            }
            ALOGW("Bad XML block: node attributes use 0x%x bytes, only have 0x%x bytes\n",
                    (unsigned int)(dtohs(attrExt->attributeStart)+attrSize),
                    (unsigned int)(size-headerSize));
        }
        else {
            ALOGW("Bad XML start block: node header size 0x%x, size 0x%x\n",
                (unsigned int)headerSize, (unsigned int)size);
        }
        return BAD_TYPE;
    }

    return err;

#if 0
    const bool isStart = dtohs(node->header.type) == RES_XML_START_ELEMENT_TYPE;

    const uint16_t headerSize = dtohs(node->header.headerSize);
    const uint32_t size = dtohl(node->header.size);

    if (headerSize >= (isStart ? sizeof(ResXMLTree_attrNode) : sizeof(ResXMLTree_node))) {
        if (size >= headerSize) {
            if (((const uint8_t*)node) <= (mDataEnd-size)) {
                if (!isStart) {
                    return NO_ERROR;
                }
                if ((((size_t)dtohs(node->attributeSize))*dtohs(node->attributeCount))
                        <= (size-headerSize)) {
                    return NO_ERROR;
                }
                ALOGW("Bad XML block: node attributes use 0x%x bytes, only have 0x%x bytes\n",
                        ((int)dtohs(node->attributeSize))*dtohs(node->attributeCount),
                        (int)(size-headerSize));
                return BAD_TYPE;
            }
            ALOGW("Bad XML block: node at 0x%x extends beyond data end 0x%x\n",
                    (int)(((const uint8_t*)node)-((const uint8_t*)mHeader)), (int)mSize);
            return BAD_TYPE;
        }
        ALOGW("Bad XML block: node at 0x%x header size 0x%x smaller than total size 0x%x\n",
                (int)(((const uint8_t*)node)-((const uint8_t*)mHeader)),
                (int)headerSize, (int)size);
        return BAD_TYPE;
    }
    ALOGW("Bad XML block: node at 0x%x header size 0x%x too small\n",
            (int)(((const uint8_t*)node)-((const uint8_t*)mHeader)),
            (int)headerSize);
    return BAD_TYPE;
#endif
}

// --------------------------------------------------------------------
// --------------------------------------------------------------------
// --------------------------------------------------------------------

void ResTable_config::copyFromDeviceNoSwap(const ResTable_config& o) {
    const size_t size = dtohl(o.size);
    if (size >= sizeof(ResTable_config)) {
        *this = o;
    } else {
        memcpy(this, &o, size);
        memset(((uint8_t*)this)+size, 0, sizeof(ResTable_config)-size);
    }
}

void ResTable_config::copyFromDtoH(const ResTable_config& o) {
    copyFromDeviceNoSwap(o);
    size = sizeof(ResTable_config);
    mcc = dtohs(mcc);
    mnc = dtohs(mnc);
    density = dtohs(density);
    screenWidth = dtohs(screenWidth);
    screenHeight = dtohs(screenHeight);
    sdkVersion = dtohs(sdkVersion);
    minorVersion = dtohs(minorVersion);
    smallestScreenWidthDp = dtohs(smallestScreenWidthDp);
    screenWidthDp = dtohs(screenWidthDp);
    screenHeightDp = dtohs(screenHeightDp);
}

void ResTable_config::swapHtoD() {
    size = htodl(size);
    mcc = htods(mcc);
    mnc = htods(mnc);
    density = htods(density);
    screenWidth = htods(screenWidth);
    screenHeight = htods(screenHeight);
    sdkVersion = htods(sdkVersion);
    minorVersion = htods(minorVersion);
    smallestScreenWidthDp = htods(smallestScreenWidthDp);
    screenWidthDp = htods(screenWidthDp);
    screenHeightDp = htods(screenHeightDp);
}

int ResTable_config::compare(const ResTable_config& o) const {
    int32_t diff = (int32_t)(imsi - o.imsi);
    if (diff != 0) return diff;
    diff = (int32_t)(locale - o.locale);
    if (diff != 0) return diff;
    diff = (int32_t)(screenType - o.screenType);
    if (diff != 0) return diff;
    diff = (int32_t)(input - o.input);
    if (diff != 0) return diff;
    diff = (int32_t)(screenSize - o.screenSize);
    if (diff != 0) return diff;
    diff = (int32_t)(version - o.version);
    if (diff != 0) return diff;
    diff = (int32_t)(screenLayout - o.screenLayout);
    if (diff != 0) return diff;
    diff = (int32_t)(uiMode - o.uiMode);
    if (diff != 0) return diff;
    diff = (int32_t)(smallestScreenWidthDp - o.smallestScreenWidthDp);
    if (diff != 0) return diff;
    diff = (int32_t)(screenSizeDp - o.screenSizeDp);
    return (int)diff;
}

int ResTable_config::compareLogical(const ResTable_config& o) const {
    if (mcc != o.mcc) {
        return mcc < o.mcc ? -1 : 1;
    }
    if (mnc != o.mnc) {
        return mnc < o.mnc ? -1 : 1;
    }
    if (language[0] != o.language[0]) {
        return language[0] < o.language[0] ? -1 : 1;
    }
    if (language[1] != o.language[1]) {
        return language[1] < o.language[1] ? -1 : 1;
    }
    if (country[0] != o.country[0]) {
        return country[0] < o.country[0] ? -1 : 1;
    }
    if (country[1] != o.country[1]) {
        return country[1] < o.country[1] ? -1 : 1;
    }
    if ((screenLayout & MASK_LAYOUTDIR) != (o.screenLayout & MASK_LAYOUTDIR)) {
        return (screenLayout & MASK_LAYOUTDIR) < (o.screenLayou