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Diffstat (limited to '')
| -rw-r--r-- | sal/osl/unx/file.cxx | 1621 |
1 files changed, 1621 insertions, 0 deletions
diff --git a/sal/osl/unx/file.cxx b/sal/osl/unx/file.cxx new file mode 100644 index 000000000..d8396f627 --- /dev/null +++ b/sal/osl/unx/file.cxx @@ -0,0 +1,1621 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you 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 . + */ + +#include <config_features.h> +#include <o3tl/safeint.hxx> +#include <o3tl/typed_flags_set.hxx> +#include <sal/log.hxx> +#include <osl/diagnose.h> +#include <osl/file.hxx> +#include <osl/detail/file.h> +#include <rtl/alloc.h> +#include <rtl/byteseq.hxx> +#include <rtl/string.hxx> + +#include "system.hxx" +#include "createfilehandlefromfd.hxx" +#include "file_error_transl.hxx" +#include "file_impl.hxx" +#include "file_url.hxx" +#include "uunxapi.hxx" +#include "unixerrnostring.hxx" + +#include <algorithm> +#include <atomic> +#include <vector> +#include <cassert> +#include <limits> + +#include <string.h> +#include <pthread.h> +#include <sys/mman.h> + +#if defined(MACOSX) + +#include <sys/param.h> +#include <sys/mount.h> +#define HAVE_O_EXLOCK + +#include <CoreFoundation/CoreFoundation.h> + +#endif /* MACOSX */ + +#ifdef ANDROID +#include <osl/detail/android-bootstrap.h> +#include <android/log.h> +#include <android/asset_manager.h> +#endif + +namespace { + +enum class State +{ + Seekable = 1, /*< default */ + Readable = 2, /*< default */ + Writeable = 4, /*< open() sets, write() requires, else osl_File_E_BADF */ + Modified = 8 /*< write() sets, flush() resets */ +}; + +} + +template<> struct o3tl::typed_flags<State>: o3tl::is_typed_flags<State, 15> {}; + +namespace { + +struct FileHandle_Impl +{ + pthread_mutex_t m_mutex; + rtl_String * m_strFilePath; /*< holds native file path */ + int m_fd; + + enum Kind + { + KIND_FD = 1, + KIND_MEM = 2 + }; + int m_kind; + /** State + */ + State m_state; + + sal_uInt64 m_size; /*< file size */ + off_t m_offset; /*< physical offset from begin of file */ + // m_fileptr is hit hard in some situations, where the overhead of a mutex starts to show up, so use an atomic + std::atomic<off_t> m_fileptr; /*< logical offset from begin of file */ + + off_t m_bufptr; /*< buffer offset from begin of file */ + size_t m_buflen; /*< buffer filled [0, m_bufsiz - 1] */ + + size_t m_bufsiz; + sal_uInt8 * m_buffer; +#ifdef ANDROID + rtl_String* m_memstreambuf; /*< used for in-memory streams */ +#endif + + explicit FileHandle_Impl(int fd, Kind kind = KIND_FD, char const * path = "<anon>"); + ~FileHandle_Impl(); + + static void* operator new (size_t n); + static void operator delete (void * p); + + static size_t getpagesize(); + + sal_uInt64 getPos() const; + void setPos(sal_uInt64 uPos); + + sal_uInt64 getSize() const; + oslFileError setSize(sal_uInt64 uSize); + + oslFileError readAt( + off_t nOffset, + void* pBuffer, + size_t nBytesRequested, + sal_uInt64* pBytesRead); + + oslFileError writeAt( + off_t nOffset, + void const* pBuffer, + size_t nBytesToWrite, + sal_uInt64* pBytesWritten); + + oslFileError readFileAt( + off_t nOffset, + void* pBuffer, + size_t nBytesRequested, + sal_uInt64* pBytesRead); + + oslFileError writeFileAt( + off_t nOffset, + void const* pBuffer, + size_t nBytesToWrite, + sal_uInt64* pBytesWritten); + + oslFileError readLineAt( + off_t nOffset, + sal_Sequence** ppSequence, + sal_uInt64* pBytesRead); + + static oslFileError writeSequence_Impl( + sal_Sequence** ppSequence, + size_t* pnOffset, + const void* pBuffer, + size_t nBytes); + + oslFileError syncFile(); + + class Guard + { + pthread_mutex_t *m_mutex; + + public: + explicit Guard(pthread_mutex_t *pMutex); + ~Guard(); + }; +}; + +} + +FileHandle_Impl::Guard::Guard(pthread_mutex_t * pMutex) + : m_mutex(pMutex) +{ + assert(m_mutex); + (void) pthread_mutex_lock(m_mutex); // ignoring EINVAL if a null mutex is passed ... +} + +FileHandle_Impl::Guard::~Guard() +{ + assert(m_mutex); + (void) pthread_mutex_unlock(m_mutex); +} + +FileHandle_Impl::FileHandle_Impl(int fd, enum Kind kind, char const * path) + : m_strFilePath(nullptr), + m_fd (fd), + m_kind (kind), + m_state (State::Seekable | State::Readable), + m_size (0), + m_offset (0), + m_fileptr (0), + m_bufptr (-1), + m_buflen (0), + m_bufsiz (0), + m_buffer (nullptr) +{ + (void) pthread_mutex_init(&m_mutex, nullptr); + rtl_string_newFromStr(&m_strFilePath, path); + if (m_kind == KIND_FD) + { + size_t const pagesize = getpagesize(); + if (pagesize != size_t(-1)) + { + m_bufsiz = pagesize; + m_buffer = static_cast<sal_uInt8 *>(malloc(m_bufsiz)); + if (m_buffer) + memset(m_buffer, 0, m_bufsiz); + } + } +} + +FileHandle_Impl::~FileHandle_Impl() +{ + if (m_kind == KIND_FD) + { + free(m_buffer); + m_buffer = nullptr; + } + + rtl_string_release(m_strFilePath); + m_strFilePath = nullptr; + (void) pthread_mutex_destroy(&m_mutex); // ignoring EBUSY ... +} + +void* FileHandle_Impl::operator new (size_t n) +{ + return malloc(n); +} + +void FileHandle_Impl::operator delete (void * p) +{ + free(p); +} + +size_t FileHandle_Impl::getpagesize() +{ + return sal::static_int_cast< size_t >(::sysconf(_SC_PAGESIZE)); +} + +sal_uInt64 FileHandle_Impl::getPos() const +{ + return sal::static_int_cast< sal_uInt64 >(m_fileptr.load()); +} + +void FileHandle_Impl::setPos(sal_uInt64 uPos) +{ + m_fileptr = sal::static_int_cast< off_t >(uPos); +} + +sal_uInt64 FileHandle_Impl::getSize() const +{ + off_t const bufend = std::max(off_t(0), m_bufptr) + m_buflen; + return std::max(m_size, sal::static_int_cast< sal_uInt64 >(bufend)); +} + +oslFileError FileHandle_Impl::setSize(sal_uInt64 uSize) +{ + off_t const nSize = sal::static_int_cast< off_t >(uSize); + if (ftruncate_with_name(m_fd, nSize, m_strFilePath) == -1) + { + /* Failure. Save original result. Try fallback algorithm */ + oslFileError result = oslTranslateFileError(errno); + + /* Check against current size. Fail upon 'shrink' */ + if (uSize <= getSize()) + { + /* Failure upon 'shrink'. Return original result */ + return result; + } + + /* Save current position */ + off_t const nCurPos = lseek(m_fd, off_t(0), SEEK_CUR); + if (nCurPos == off_t(-1)) + { + int e = errno; + SAL_INFO("sal.file", "lseek(" << m_fd << ",0,SEEK_CUR): " << UnixErrnoString(e)); + return result; + } + else + SAL_INFO("sal.file", "lseek(" << m_fd << ",0,SEEK_CUR): OK"); + + /* Try 'expand' via 'lseek()' and 'write()' */ + if (lseek(m_fd, static_cast<off_t>(nSize - 1), SEEK_SET) == -1) + { + int e = errno; + SAL_INFO("sal.file", "lseek(" << m_fd << "," << nSize - 1 << ",SEEK_SET): " << UnixErrnoString(e)); + return result; + } + else + SAL_INFO("sal.file", "lseek(" << m_fd << "," << nSize - 1 << ",SEEK_SET): OK"); + + if (write(m_fd, "", size_t(1)) == -1) + { + /* Failure. Restore saved position */ + int e = errno; + SAL_INFO("sal.file", "write(" << m_fd << ",\"\",1): " << UnixErrnoString(e)); + (void) lseek(m_fd, nCurPos, SEEK_SET); + return result; + } + else + SAL_INFO("sal.file", "write(" << m_fd << ",\"\",1): OK"); + + /* Success. Restore saved position */ + if (lseek(m_fd, nCurPos, SEEK_SET) == -1) + return result; + } + + m_size = sal::static_int_cast< sal_uInt64 >(nSize); + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::readAt( + off_t nOffset, + void * pBuffer, + size_t nBytesRequested, + sal_uInt64 * pBytesRead) +{ + SAL_WARN_IF(!(m_state & State::Seekable), "sal.osl", "FileHandle_Impl::readAt(): not seekable"); + if (!(m_state & State::Seekable)) + return osl_File_E_SPIPE; + + SAL_WARN_IF(!(m_state & State::Readable), "sal.osl", "FileHandle_Impl::readAt(): not readable"); + if (!(m_state & State::Readable)) + return osl_File_E_BADF; + + if (m_kind == KIND_MEM) + { + ssize_t nBytes; + + m_offset = nOffset; + + if (o3tl::make_unsigned(m_offset) >= m_size) + { + nBytes = 0; + } + else + { + nBytes = std::min(nBytesRequested, static_cast<size_t>(m_size - m_offset)); + memmove(pBuffer, m_buffer + m_offset, nBytes); + m_offset += nBytes; + } + *pBytesRead = nBytes; + return osl_File_E_None; + } + + ssize_t nBytes = ::pread(m_fd, pBuffer, nBytesRequested, nOffset); + if ((nBytes == -1) && (errno == EOVERFLOW)) + { + /* Some 'pread()'s fail with EOVERFLOW when reading at (or past) + * end-of-file, different from 'lseek() + read()' behaviour. + * Returning '0 bytes read' and 'osl_File_E_None' instead. + */ + nBytes = 0; + } + + if (nBytes == -1) + return oslTranslateFileError(errno); + + *pBytesRead = nBytes; + + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::writeAt( + off_t nOffset, + void const * pBuffer, + size_t nBytesToWrite, + sal_uInt64 * pBytesWritten) +{ + SAL_WARN_IF(!(m_state & State::Seekable), "sal.osl", "FileHandle_Impl::writeAt(): not seekable"); + if (!(m_state & State::Seekable)) + return osl_File_E_SPIPE; + + SAL_WARN_IF(!(m_state & State::Writeable), "sal.osl", "FileHandle_Impl::writeAt(): not writeable"); + if (!(m_state & State::Writeable)) + return osl_File_E_BADF; + + ssize_t nBytes = ::pwrite(m_fd, pBuffer, nBytesToWrite, nOffset); + if (nBytes == -1) + return oslTranslateFileError(errno); + + m_size = std::max(m_size, sal::static_int_cast< sal_uInt64 >(nOffset + nBytes)); + + *pBytesWritten = nBytes; + + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::readFileAt( + off_t nOffset, + void* pBuffer, + size_t nBytesRequested, + sal_uInt64* pBytesRead) +{ + if (!(m_state & State::Seekable)) + { + // not seekable (pipe) + ssize_t nBytes = ::read(m_fd, pBuffer, nBytesRequested); + if (nBytes == -1) + return oslTranslateFileError(errno); + + *pBytesRead = nBytes; + + return osl_File_E_None; + } + + if (m_kind == KIND_MEM || !m_buffer) + { + // not buffered + return readAt(nOffset, pBuffer, nBytesRequested, pBytesRead); + } + + sal_uInt8 *buffer = static_cast<sal_uInt8*>(pBuffer); + for (*pBytesRead = 0; nBytesRequested > 0; ) + { + off_t const bufptr = (nOffset / m_bufsiz) * m_bufsiz; + size_t const bufpos = nOffset % m_bufsiz; + + if (bufptr != m_bufptr) + { + // flush current buffer + oslFileError result = syncFile(); + if (result != osl_File_E_None) + return result; + + m_bufptr = -1; + m_buflen = 0; + + if (nBytesRequested >= m_bufsiz) + { + // buffer too small, read through from file + sal_uInt64 uDone = 0; + result = readAt(nOffset, &(buffer[*pBytesRead]), nBytesRequested, &uDone); + if (result != osl_File_E_None) + return result; + + *pBytesRead += uDone; + + return osl_File_E_None; + } + + // update buffer (pointer) + sal_uInt64 uDone = 0; + result = readAt(bufptr, m_buffer, m_bufsiz, &uDone); + if (result != osl_File_E_None) + return result; + + m_bufptr = bufptr; + m_buflen = uDone; + } + + if (bufpos >= m_buflen) + { + // end of file + return osl_File_E_None; + } + + size_t const bytes = std::min(m_buflen - bufpos, nBytesRequested); + SAL_INFO("sal.fileio", "FileHandle_Impl::readFileAt(" << m_fd << ", " << nOffset << ", " << bytes << ")"); + + memcpy(&(buffer[*pBytesRead]), &(m_buffer[bufpos]), bytes); + nBytesRequested -= bytes; + *pBytesRead += bytes; + nOffset += bytes; + } + + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::writeFileAt( + off_t nOffset, + void const * pBuffer, + size_t nBytesToWrite, + sal_uInt64 * pBytesWritten) +{ + if (!(m_state & State::Seekable)) + { + // not seekable (pipe) + ssize_t nBytes = ::write(m_fd, pBuffer, nBytesToWrite); + if (nBytes == -1) + return oslTranslateFileError(errno); + + *pBytesWritten = nBytes; + + return osl_File_E_None; + } + if (!m_buffer) + { + // not buffered + return writeAt(nOffset, pBuffer, nBytesToWrite, pBytesWritten); + } + + sal_uInt8 const * buffer = static_cast<sal_uInt8 const *>(pBuffer); + for (*pBytesWritten = 0; nBytesToWrite > 0;) + { + off_t const bufptr = (nOffset / m_bufsiz) * m_bufsiz; + size_t const bufpos = nOffset % m_bufsiz; + if (bufptr != m_bufptr) + { + // flush current buffer + oslFileError result = syncFile(); + if (result != osl_File_E_None) + return result; + m_bufptr = -1; + m_buflen = 0; + + if (nBytesToWrite >= m_bufsiz) + { + // buffer too small, write through to file + sal_uInt64 uDone = 0; + result = writeAt(nOffset, &(buffer[*pBytesWritten]), nBytesToWrite, &uDone); + if (result != osl_File_E_None) + return result; + + if (uDone != nBytesToWrite) + return osl_File_E_IO; + + *pBytesWritten += uDone; + + return osl_File_E_None; + } + + // update buffer (pointer) + sal_uInt64 uDone = 0; + result = readAt(bufptr, m_buffer, m_bufsiz, &uDone); + if (result != osl_File_E_None) + return result; + + m_bufptr = bufptr; + m_buflen = uDone; + } + + size_t const bytes = std::min(m_bufsiz - bufpos, nBytesToWrite); + SAL_INFO("sal.fileio", "FileHandle_Impl::writeFileAt(" << m_fd << ", " << nOffset << ", " << bytes << ")"); + + memcpy(&(m_buffer[bufpos]), &(buffer[*pBytesWritten]), bytes); + nBytesToWrite -= bytes; + *pBytesWritten += bytes; + nOffset += bytes; + + m_buflen = std::max(m_buflen, bufpos + bytes); + m_state |= State::Modified; + } + + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::readLineAt( + off_t nOffset, + sal_Sequence ** ppSequence, + sal_uInt64 * pBytesRead) +{ + oslFileError result = osl_File_E_None; + + off_t bufptr = nOffset / m_bufsiz * m_bufsiz; + if (bufptr != m_bufptr) + { + /* flush current buffer */ + result = syncFile(); + if (result != osl_File_E_None) + return result; + + /* update buffer (pointer) */ + sal_uInt64 uDone = 0; + result = readAt(bufptr, m_buffer, m_bufsiz, &uDone); + if (result != osl_File_E_None) + return result; + + m_bufptr = bufptr; + m_buflen = uDone; + } + + static int const LINE_STATE_BEGIN = 0; + static int const LINE_STATE_CR = 1; + static int const LINE_STATE_LF = 2; + + size_t bufpos = nOffset - m_bufptr, curpos = bufpos, dstpos = 0; + int state = (bufpos >= m_buflen) ? LINE_STATE_LF : LINE_STATE_BEGIN; + + while (state != LINE_STATE_LF) + { + if (curpos >= m_buflen) + { + /* buffer examined */ + if ((curpos - bufpos) > 0) + { + /* flush buffer to sequence */ + result = writeSequence_Impl( + ppSequence, &dstpos, &(m_buffer[bufpos]), curpos - bufpos); + if (result != osl_File_E_None) + return result; + + *pBytesRead += curpos - bufpos; + nOffset += curpos - bufpos; + } + + bufptr = nOffset / m_bufsiz * m_bufsiz; + if (bufptr != m_bufptr) + { + /* update buffer (pointer) */ + sal_uInt64 uDone = 0; + result = readAt(bufptr, m_buffer, m_bufsiz, &uDone); + if (result != osl_File_E_None) + return result; + + m_bufptr = bufptr; + m_buflen = uDone; + } + + bufpos = nOffset - m_bufptr; + curpos = bufpos; + if (bufpos >= m_buflen) + break; + } + + switch (state) + { + case LINE_STATE_CR: + state = LINE_STATE_LF; + switch (m_buffer[curpos]) + { + case 0x0A: /* CRLF */ + /* eat current char */ + curpos++; + break; + default: /* single CR */ + /* keep current char */ + break; + } + break; + default: + /* determine next state */ + switch (m_buffer[curpos]) + { + case 0x0A: /* single LF */ + state = LINE_STATE_LF; + break; + case 0x0D: /* CR */ + state = LINE_STATE_CR; + break; + default: /* advance to next char */ + curpos++; + break; + } + if (state != LINE_STATE_BEGIN) + { + /* skip the newline char */ + curpos++; + + /* flush buffer to sequence */ + result = writeSequence_Impl( + ppSequence, &dstpos, &(m_buffer[bufpos]), curpos - bufpos - 1); + if (result != osl_File_E_None) + return result; + + *pBytesRead += curpos - bufpos; + nOffset += curpos - bufpos; + } + break; + } + } + + result = writeSequence_Impl(ppSequence, &dstpos, nullptr, 0); + if (result != osl_File_E_None) + return result; + + if (dstpos > 0) + return osl_File_E_None; + + if (bufpos >= m_buflen) + return osl_File_E_AGAIN; + + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::writeSequence_Impl( + sal_Sequence ** ppSequence, + size_t * pnOffset, + const void * pBuffer, + size_t nBytes) +{ + sal_Int32 nElements = *pnOffset + nBytes; + if (!*ppSequence) + { + /* construct sequence */ + rtl_byte_sequence_constructNoDefault(ppSequence, nElements); + } + else if (nElements != (*ppSequence)->nElements) + { + /* resize sequence */ + rtl_byte_sequence_realloc(ppSequence, nElements); + } + + if (*ppSequence && nBytes != 0) + { + /* fill sequence */ + memcpy(&((*ppSequence)->elements[*pnOffset]), pBuffer, nBytes); + *pnOffset += nBytes; + } + + return (*ppSequence) ? osl_File_E_None : osl_File_E_NOMEM; +} + +oslFileError FileHandle_Impl::syncFile() +{ + oslFileError result = osl_File_E_None; + if (m_state & State::Modified) + { + sal_uInt64 uDone = 0; + result = writeAt(m_bufptr, m_buffer, m_buflen, &uDone); + if (result != osl_File_E_None) + return result; + + if (uDone != m_buflen) + return osl_File_E_IO; + + m_state &= ~State::Modified; + } + + return result; +} + +oslFileHandle osl::detail::createFileHandleFromFD(int fd) +{ + if (fd == -1) + return nullptr; // EINVAL + + struct stat aFileStat; + if (fstat(fd, &aFileStat) == -1) + return nullptr; // EBADF + + FileHandle_Impl *pImpl = new FileHandle_Impl(fd); + + // assume writeable + pImpl->m_state |= State::Writeable; + if (!S_ISREG(aFileStat.st_mode)) + { + /* not a regular file, mark not seekable */ + pImpl->m_state &= ~State::Seekable; + } + else + { + /* regular file, init current size */ + pImpl->m_size = sal::static_int_cast< sal_uInt64 >(aFileStat.st_size); + } + + SAL_INFO("sal.file", "osl::detail::createFileHandleFromFD(" << pImpl->m_fd << ", writeable) => " << pImpl->m_strFilePath); + + return static_cast<oslFileHandle>(pImpl); +} + +static int osl_file_adjustLockFlags(const char *path, int flags) +{ +#ifdef MACOSX + /* + * The AFP implementation of MacOS X 10.4 treats O_EXLOCK in a way + * that makes it impossible for OOo to create a backup copy of the + * file it keeps opened. OTOH O_SHLOCK for AFP behaves as desired by + * the OOo file handling, so we need to check the path of the file + * for the filesystem name. + */ + struct statfs s; + if(statfs(path, &s) >= 0) + { + if(strncmp("afpfs", s.f_fstypename, 5) == 0) + { + flags &= ~O_EXLOCK; + flags |= O_SHLOCK; + } + else + { + /* Needed flags to allow opening a webdav file */ + flags &= ~(O_EXLOCK | O_SHLOCK | O_NONBLOCK); + } + } +#else + (void) path; +#endif + + return flags; +} + +static bool osl_file_queryLocking(sal_uInt32 uFlags) +{ +#if !defined HAVE_O_EXLOCK + if (!(uFlags & osl_File_OpenFlag_NoLock) + && ((uFlags & osl_File_OpenFlag_Write) + || (uFlags & osl_File_OpenFlag_Create))) + { + static bool enabled = getenv("SAL_ENABLE_FILE_LOCKING") != nullptr; + // getenv is not thread safe, so minimize use of result + return enabled; + } +#else + (void) uFlags; +#endif + return false; +} + +#ifdef HAVE_O_EXLOCK +#define OPEN_WRITE_FLAGS ( O_RDWR | O_EXLOCK | O_NONBLOCK ) +#define OPEN_CREATE_FLAGS ( O_CREAT | O_RDWR | O_EXLOCK | O_NONBLOCK ) +#else +#define OPEN_WRITE_FLAGS ( O_RDWR ) +#define OPEN_CREATE_FLAGS ( O_CREAT | O_RDWR ) +#endif + +#if defined ANDROID + +namespace { + +static oslFileError openMemoryAsFile(const OString &rData, + oslFileHandle *pHandle, + const char *path) +{ + const char *address = rData.getStr(); + size_t size = rData.getLength(); + + FileHandle_Impl *pImpl = new FileHandle_Impl(-1, FileHandle_Impl::KIND_MEM, path); + pImpl->m_size = sal::static_int_cast< sal_uInt64 >(size); + + *pHandle = (oslFileHandle)(pImpl); + + pImpl->m_bufptr = 0; + pImpl->m_buflen = size; + pImpl->m_memstreambuf = rData.pData; + rtl_string_acquire(pImpl->m_memstreambuf); + + pImpl->m_bufsiz = size; + pImpl->m_buffer = reinterpret_cast<sal_uInt8*>(const_cast<char *>(address)); + + return osl_File_E_None; +} + +/* + * Reading files from /assets/ on Android via a transition into the VM + * shows on profiles and is rather slow; so we cache small files as + * used by UNO, UI-builder etc. + */ +class AndroidFileCache { +public: + struct Entry { + OString maFilePath; + OString maData; + }; + AndroidFileCache(size_t nElements) + : mnCur(0) + { + maEntries.resize(nElements); + assert (maEntries.size() == nElements); + } + Entry *find(const char *cpFilePath) + { + for (auto &it : maEntries) + { + if (!strcmp(it.maFilePath.getStr(), cpFilePath)) + return ⁢ + } + return nullptr; + } + // no clever LRU - but - good enough for now. + void insert(const char *cpFilePath, OString &rData) + { + assert (maEntries.size() > 0); + if (++mnCur >= maEntries.size()) + mnCur = 0; + maEntries[mnCur].maFilePath = OString(cpFilePath, strlen(cpFilePath)); + maEntries[mnCur].maData = rData; + } + static AndroidFileCache &getHitCache() + { + static AndroidFileCache *pCache = new AndroidFileCache(16); + return *pCache; + } + static AndroidFileCache &getMissCache() + { + static AndroidFileCache *pCache = new AndroidFileCache(32); + return *pCache; + } +private: + size_t mnCur; + std::vector<Entry> maEntries; +}; + +} // namespace + +#endif + +oslFileError openFilePath(const char *cpFilePath, oslFileHandle* pHandle, + sal_uInt32 uFlags, mode_t mode) +{ + oslFileError eRet; + +#ifdef ANDROID + /* Opening a file from /assets read-only means + * we should mmap it from the .apk file + */ + if (strncmp(cpFilePath, "/assets/", sizeof ("/assets/") - 1) == 0) + { + OString aData; + bool bCache = true; + + const char *cpAssetsPath = cpFilePath + sizeof("/assets/") - 1; + // some requests are /assets//foo... + if (cpAssetsPath[0] == '/') + { + __android_log_print(ANDROID_LOG_DEBUG,"libo:sal/osl/unx/file", "double-slash in path: %s", cpFilePath); + cpAssetsPath++; + } + + AndroidFileCache::Entry *pHit = AndroidFileCache::getHitCache().find(cpAssetsPath); + if (pHit) + aData = pHit->maData; + + else + { + bCache = false; + AndroidFileCache::Entry *pMiss = AndroidFileCache::getMissCache().find(cpAssetsPath); + if (pMiss) + { + errno = ENOENT; + __android_log_print(ANDROID_LOG_ERROR,"libo:sal/osl/unx/file", "miss cache: failed to open %s", cpFilePath); + return osl_File_E_NOENT; + } + AAssetManager* mgr = lo_get_native_assetmgr(); + AAsset* asset = AAssetManager_open(mgr, cpAssetsPath, AASSET_MODE_BUFFER); + if (!asset) + { + AndroidFileCache::getMissCache().insert(cpAssetsPath, aData); + errno = ENOENT; + __android_log_print(ANDROID_LOG_ERROR,"libo:sal/osl/unx/file", "failed to open %s", cpFilePath); + return osl_File_E_NOENT; + } + else + { + rtl_String *pData = nullptr; + size_t size = AAsset_getLength(asset); + rtl_string_new_WithLength(&pData, size); + pData->length = size; + AAsset_read(asset, pData->buffer, size); + AAsset_close(asset); + + aData = OString(pData, SAL_NO_ACQUIRE); + + if (pData->length < 50 * 1024) + AndroidFileCache::getHitCache().insert(cpAssetsPath, aData); + } + } + + if (uFlags & osl_File_OpenFlag_Write) + { + // It seems to work better to silently "open" it read-only + // and let write attempts, if any, fail later. Otherwise + // loading a document from /assets fails with that idiotic + // "General Error" dialog... + } + SAL_INFO("sal.file", "osl_openFile(" << cpFilePath << ") => '" << cpAssetsPath << "'" + << aData.getLength() << " bytes from file " << (bCache ? "cache" : "system")); + return openMemoryAsFile(aData, pHandle, cpFilePath); + } +#endif + + /* set mode and flags */ + int defmode = (uFlags & osl_File_OpenFlag_Private) ? S_IRUSR : S_IRUSR | S_IRGRP | S_IROTH; + int flags = O_RDONLY; + + if (uFlags & osl_File_OpenFlag_Write) + { + defmode |= (uFlags & osl_File_OpenFlag_Private) ? S_IWUSR : S_IWUSR | S_IWGRP | S_IWOTH; + flags = OPEN_WRITE_FLAGS; + } + + if (uFlags & osl_File_OpenFlag_Create) + { + defmode |= (uFlags & osl_File_OpenFlag_Private) ? S_IWUSR : S_IWUSR | S_IWGRP | S_IWOTH; + flags = OPEN_CREATE_FLAGS; + } + + if (mode == mode_t(-1)) + mode = defmode; + + /* Check for flags passed in from SvFileStream::Open() */ + if (uFlags & osl_File_OpenFlag_Trunc) + flags |= O_TRUNC; + + if (!(uFlags & osl_File_OpenFlag_NoExcl)) + flags |= O_EXCL; + + if (uFlags & osl_File_OpenFlag_NoLock) + { +#ifdef HAVE_O_EXLOCK + flags &= ~(O_EXLOCK | O_SHLOCK | O_NONBLOCK); +#endif /* HAVE_O_EXLOCK */ + } + else + { + flags = osl_file_adjustLockFlags (cpFilePath, flags); + } + + // O_EXCL can be set only when O_CREAT is set + if (flags & O_EXCL && !(flags & O_CREAT)) + flags &= ~O_EXCL; + + /* open the file */ + int fd = open_c( cpFilePath, flags, mode ); + if (fd == -1) + { + return oslTranslateFileError(errno); + } + +#if !HAVE_FEATURE_MACOSX_SANDBOX + /* reset O_NONBLOCK flag */ + if (flags & O_NONBLOCK) + { + int f = fcntl(fd, F_GETFL, 0); + if (f == -1) + { + int e = errno; + SAL_INFO("sal.file", "fcntl(" << fd << ",F_GETFL,0): " << UnixErrnoString(e)); + eRet = oslTranslateFileError(e); + (void) close(fd); + SAL_INFO("sal.file", "close(" << fd << ")"); + return eRet; + } + else + SAL_INFO("sal.file", "fcntl(" << fd << ",F_GETFL,0): OK"); + + if (fcntl(fd, F_SETFL, (f & ~O_NONBLOCK)) == -1) + { + int e = errno; + SAL_INFO("sal.file", "fcntl(" << fd << ",F_SETFL,(f & ~O_NONBLOCK)): " << UnixErrnoString(e)); + eRet = oslTranslateFileError(e); + (void) close(fd); + SAL_INFO("sal.file", "close(" << fd << ")"); + return eRet; + } + else + SAL_INFO("sal.file", "fcntl(" << fd << ",F_SETFL,(f & ~O_NONBLOCK)): OK"); + } +#endif + + /* get file status (mode, size) */ + struct stat aFileStat; + if (fstat(fd, &aFileStat) == -1) + { + int e = errno; + SAL_INFO("sal.file", "fstat(" << fd << "): " << UnixErrnoString(e)); + eRet = oslTranslateFileError(e); + (void) close(fd); + SAL_INFO("sal.file", "close(" << fd << ")"); + return eRet; + } + else + SAL_INFO("sal.file", "fstat(" << fd << "): OK"); + + if (!S_ISREG(aFileStat.st_mode)) + { + /* we only open regular files here */ + SAL_INFO("sal.file", "osl_openFile(" << cpFilePath << "): not a regular file"); + (void) close(fd); + SAL_INFO("sal.file", "close(" << fd << ")"); + return osl_File_E_INVAL; + } + + if (osl_file_queryLocking(uFlags)) + { +#ifdef MACOSX + if (flock(fd, LOCK_EX | LOCK_NB) == -1) + { + int e = errno; + SAL_INFO("sal.file", "flock(" << fd << ",LOCK_EX|LOCK_NB): " << UnixErrnoString(e)); + /* Mac OSX returns ENOTSUP for webdav drives. We should try read lock */ + + // Restore errno after possibly having been overwritten by the SAL_INFO above... + errno = e; + if ((errno != ENOTSUP) || ((flock(fd, LOCK_SH | LOCK_NB) == 1) && (errno != ENOTSUP))) + { + eRet = oslTranslateFileError(errno); + (void) close(fd); + SAL_INFO("sal.file", "close(" << fd << ")"); + return eRet; + } + } + else + SAL_INFO("sal.file", "flock(" << fd << ",LOCK_EX|LOCK_NB): OK"); +#else /* F_SETLK */ + struct flock aflock; + + aflock.l_type = F_WRLCK; + aflock.l_whence = SEEK_SET; + aflock.l_start = 0; + aflock.l_len = 0; + + if (fcntl(fd, F_SETLK, &aflock) == -1) + { + int e = errno; + SAL_INFO("sal.file", "fcntl(" << fd << ",F_SETLK): " << UnixErrnoString(e)); + eRet = oslTranslateFileError(e); + (void) close(fd); + SAL_INFO("sal.file", "close(" << fd << ")"); + return eRet; + } +#endif /* F_SETLK */ + } + + /* allocate memory for impl structure */ + FileHandle_Impl *pImpl = new FileHandle_Impl(fd, FileHandle_Impl::KIND_FD, cpFilePath); + if (flags & O_RDWR) + pImpl->m_state |= State::Writeable; + + pImpl->m_size = sal::static_int_cast< sal_uInt64 >(aFileStat.st_size); + + *pHandle = static_cast<oslFileHandle>(pImpl); + + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_openFile(rtl_uString* ustrFileURL, oslFileHandle* pHandle, sal_uInt32 uFlags) +{ + return openFile(ustrFileURL, pHandle, uFlags, mode_t(-1)); +} + +oslFileError openFile(rtl_uString* ustrFileURL, oslFileHandle* pHandle, sal_uInt32 uFlags, mode_t mode) +{ + oslFileError eRet; + + if ((!ustrFileURL) || (ustrFileURL->length == 0) || (!pHandle)) + return osl_File_E_INVAL; + + /* convert file URL to system path */ + char buffer[PATH_MAX]; + eRet = FileURLToPath(buffer, sizeof(buffer), ustrFileURL); + if (eRet != osl_File_E_None) + return eRet; + +#ifdef MACOSX + if (macxp_resolveAlias(buffer, sizeof(buffer)) != 0) + return oslTranslateFileError(errno); +#endif /* MACOSX */ + + return openFilePath(buffer, pHandle, uFlags, mode); +} + +oslFileError SAL_CALL osl_closeFile(oslFileHandle Handle) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if (!pImpl) + return osl_File_E_INVAL; + + if (pImpl->m_kind == FileHandle_Impl::KIND_MEM) + { +#ifdef ANDROID + rtl_string_release(pImpl->m_memstreambuf); + pImpl->m_memstreambuf = nullptr; + + pImpl->m_buffer = NULL; +#endif + delete pImpl; + return osl_File_E_None; + } + + if (pImpl->m_fd < 0) + return osl_File_E_INVAL; + + (void) pthread_mutex_lock(&(pImpl->m_mutex)); + + /* close(2) implicitly (and unconditionally) unlocks */ + oslFileError result = pImpl->syncFile(); + if (result != osl_File_E_None) + { + /* close, ignoring double failure */ + (void) close(pImpl->m_fd); + SAL_INFO("sal.file", "close(" << pImpl->m_fd << ")"); + } + else if (close(pImpl->m_fd) == -1) + { + int e = errno; + SAL_INFO("sal.file", "close(" << pImpl->m_fd << "): " << UnixErrnoString(e)); + /* translate error code */ + result = oslTranslateFileError(e); + } + else + SAL_INFO("sal.file", "close(" << pImpl->m_fd << "): OK"); + + (void) pthread_mutex_unlock(&(pImpl->m_mutex)); + delete pImpl; + return result; +} + +oslFileError SAL_CALL osl_syncFile(oslFileHandle Handle) +{ + FileHandle_Impl* pImpl = static_cast<FileHandle_Impl*>(Handle); + + if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1))) + return osl_File_E_INVAL; + + if (pImpl->m_kind == FileHandle_Impl::KIND_MEM) + return osl_File_E_None; + + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + + oslFileError result = pImpl->syncFile(); + + if (result != osl_File_E_None) + return result; + + if (fsync(pImpl->m_fd) == -1) + { + int e = errno; + SAL_INFO("sal.file", "fsync(" << pImpl->m_fd << "): " << UnixErrnoString(e)); + return oslTranslateFileError(e); + } + else + SAL_INFO("sal.file", "fsync(" << pImpl->m_fd << "): OK"); + + return osl_File_E_None; +} + +const off_t MAX_OFF_T = std::numeric_limits< off_t >::max(); + +namespace { + +// coverity[result_independent_of_operands] - crossplatform requirement +template<typename T> bool exceedsMaxOffT(T n) { return n > MAX_OFF_T; } + +// coverity[result_independent_of_operands] - crossplatform requirement +template<typename T> bool exceedsMinOffT(T n) +{ return n < std::numeric_limits<off_t>::min(); } + +} + +oslFileError SAL_CALL osl_mapFile( + oslFileHandle Handle, + void** ppAddr, + sal_uInt64 uLength, + sal_uInt64 uOffset, + sal_uInt32 uFlags +) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1)) || (!ppAddr)) + return osl_File_E_INVAL; + + *ppAddr = nullptr; + + if (uLength > SAL_MAX_SIZE) + return osl_File_E_OVERFLOW; + + size_t const nLength = sal::static_int_cast< size_t >(uLength); + + if (exceedsMaxOffT(uOffset)) + return osl_File_E_OVERFLOW; + + if (pImpl->m_kind == FileHandle_Impl::KIND_MEM) + { + *ppAddr = pImpl->m_buffer + uOffset; + return osl_File_E_None; + } + + off_t const nOffset = sal::static_int_cast< off_t >(uOffset); + + void* p = mmap(nullptr, nLength, PROT_READ, MAP_SHARED, pImpl->m_fd, nOffset); + + if (p == MAP_FAILED) + return oslTranslateFileError(errno); + + *ppAddr = p; + + if (uFlags & osl_File_MapFlag_RandomAccess) + { + // Determine memory pagesize. + size_t const nPageSize = FileHandle_Impl::getpagesize(); + if (nPageSize != size_t(-1)) + { + /* + * Pagein, touching first byte of every memory page. + * Note: volatile disables optimizing the loop away. + */ + sal_uInt8 volatile *pData(static_cast<sal_uInt8*>(*ppAddr)); + size_t nSize(nLength); + + while (nSize > nPageSize) + { + pData[0]; + pData += nPageSize; + nSize -= nPageSize; + } + + if (nSize > 0) + pData[0]; + } + } + + if (uFlags & osl_File_MapFlag_WillNeed) + { + // On Linux, madvise(..., MADV_WILLNEED) appears to have the undesirable + // effect of not returning until the data has actually been paged in, so + // that its net effect would typically be to slow down the process + // (which could start processing at the beginning of the data while the + // OS simultaneously pages in the rest); on other platforms, it remains + // to be evaluated whether madvise or equivalent is available and + // actually useful: +#if defined MACOSX || (defined(__sun) && (!defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__))) + int e = posix_madvise(p, nLength, POSIX_MADV_WILLNEED); + if (e != 0) + SAL_INFO("sal.file", "posix_madvise(..., POSIX_MADV_WILLNEED) failed with " << e); + +#elif defined __sun + if (madvise(static_cast< caddr_t >(p), nLength, MADV_WILLNEED) != 0) + SAL_INFO("sal.file", "madvise(..., MADV_WILLNEED) failed with " << UnixErrnoString(errno)); +#endif + } + + return osl_File_E_None; +} + +static oslFileError unmapFile(void* pAddr, sal_uInt64 uLength) +{ + if (!pAddr) + return osl_File_E_INVAL; + + if (uLength > SAL_MAX_SIZE) + return osl_File_E_OVERFLOW; + + size_t const nLength = sal::static_int_cast< size_t >(uLength); + + if (munmap(pAddr, nLength) == -1) + return oslTranslateFileError(errno); + + return osl_File_E_None; +} + +#ifndef ANDROID + +// Note that osl_unmapFile() just won't work on Android in general +// where for (uncompressed) files inside the .apk, in the /assets +// folder osl_mapFile just returns a pointer to the file inside the +// already mmapped .apk archive. + +oslFileError SAL_CALL osl_unmapFile(void* pAddr, sal_uInt64 uLength) +{ + return unmapFile(pAddr, uLength); +} + +#endif + +oslFileError SAL_CALL osl_unmapMappedFile(oslFileHandle Handle, void* pAddr, sal_uInt64 uLength) +{ + FileHandle_Impl *pImpl = static_cast<FileHandle_Impl*>(Handle); + + if (!pImpl) + return osl_File_E_INVAL; + + if (pImpl->m_kind == FileHandle_Impl::KIND_FD) + return unmapFile(pAddr, uLength); + + // For parts of already mmapped "parent" files, whose mapping we + // can't change, not much we can or should do... + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_readLine( + oslFileHandle Handle, + sal_Sequence ** ppSequence) +{ + FileHandle_Impl *pImpl = static_cast<FileHandle_Impl*>(Handle); + + if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1)) || (!ppSequence)) + return osl_File_E_INVAL; + + sal_uInt64 uBytesRead = 0; + + // read at current fileptr; fileptr += uBytesRead; + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + oslFileError result = pImpl->readLineAt(pImpl->m_fileptr, ppSequence, &uBytesRead); + + if (result == osl_File_E_None) + pImpl->m_fileptr += uBytesRead; + + return result; +} + +oslFileError SAL_CALL osl_readFile( + oslFileHandle Handle, + void * pBuffer, + sal_uInt64 uBytesRequested, + sal_uInt64 * pBytesRead) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1)) || (!pBuffer) || (!pBytesRead)) + return osl_File_E_INVAL; + + static sal_uInt64 const g_limit_ssize_t = std::numeric_limits< ssize_t >::max(); + if (g_limit_ssize_t < uBytesRequested) + return osl_File_E_OVERFLOW; + + size_t const nBytesRequested = sal::static_int_cast< size_t >(uBytesRequested); + + // read at current fileptr; fileptr += *pBytesRead; + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + oslFileError result = pImpl->readFileAt(pImpl->m_fileptr, pBuffer, nBytesRequested, pBytesRead); + + if (result == osl_File_E_None) + pImpl->m_fileptr += *pBytesRead; + + return result; +} + +oslFileError SAL_CALL osl_writeFile( + oslFileHandle Handle, + const void * pBuffer, + sal_uInt64 uBytesToWrite, + sal_uInt64 * pBytesWritten) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if ((!pImpl) || (pImpl->m_fd == -1) || (!pBuffer) || (!pBytesWritten)) + return osl_File_E_INVAL; + + if (!(pImpl->m_state & State::Writeable)) + return osl_File_E_BADF; + + static sal_uInt64 const g_limit_ssize_t = std::numeric_limits< ssize_t >::max(); + if (g_limit_ssize_t < uBytesToWrite) + return osl_File_E_OVERFLOW; + + size_t const nBytesToWrite = sal::static_int_cast< size_t >(uBytesToWrite); + + // write at current fileptr; fileptr += *pBytesWritten; + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + oslFileError result = pImpl->writeFileAt(pImpl->m_fileptr, pBuffer, nBytesToWrite, pBytesWritten); + if (result == osl_File_E_None) + pImpl->m_fileptr += *pBytesWritten; + + return result; +} + +oslFileError SAL_CALL osl_readFileAt( + oslFileHandle Handle, + sal_uInt64 uOffset, + void* pBuffer, + sal_uInt64 uBytesRequested, + sal_uInt64* pBytesRead) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1)) || (!pBuffer) || (!pBytesRead)) + return osl_File_E_INVAL; + + if (!(pImpl->m_state & State::Seekable)) + return osl_File_E_SPIPE; + + if (exceedsMaxOffT(uOffset)) + return osl_File_E_OVERFLOW; + + off_t const nOffset = sal::static_int_cast< off_t >(uOffset); + + static sal_uInt64 const g_limit_ssize_t = std::numeric_limits< ssize_t >::max(); + if (g_limit_ssize_t < uBytesRequested) + return osl_File_E_OVERFLOW; + + size_t const nBytesRequested = sal::static_int_cast< size_t >(uBytesRequested); + + // read at specified fileptr + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + + return pImpl->readFileAt(nOffset, pBuffer, nBytesRequested, pBytesRead); +} + +oslFileError SAL_CALL osl_writeFileAt( + oslFileHandle Handle, + sal_uInt64 uOffset, + const void* pBuffer, + sal_uInt64 uBytesToWrite, + sal_uInt64* pBytesWritten) +{ + FileHandle_Impl* pImpl = static_cast<FileHandle_Impl*>(Handle); + + if ((!pImpl) || (pImpl->m_fd == -1) || (!pBuffer) || (!pBytesWritten)) + return osl_File_E_INVAL; + + if (!(pImpl->m_state & State::Seekable)) + return osl_File_E_SPIPE; + + if (!(pImpl->m_state & State::Writeable)) + return osl_File_E_BADF; + + if (exceedsMaxOffT(uOffset)) + return osl_File_E_OVERFLOW; + + off_t const nOffset = sal::static_int_cast< off_t >(uOffset); + + static sal_uInt64 const g_limit_ssize_t = std::numeric_limits< ssize_t >::max(); + if (g_limit_ssize_t < uBytesToWrite) + return osl_File_E_OVERFLOW; + + size_t const nBytesToWrite = sal::static_int_cast< size_t >(uBytesToWrite); + + // write at specified fileptr + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + + return pImpl->writeFileAt(nOffset, pBuffer, nBytesToWrite, pBytesWritten); +} + +oslFileError SAL_CALL osl_isEndOfFile(oslFileHandle Handle, sal_Bool *pIsEOF) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1)) || (!pIsEOF)) + return osl_File_E_INVAL; + + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + *pIsEOF = (pImpl->getPos() == pImpl->getSize()); + + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_getFilePos(oslFileHandle Handle, sal_uInt64* pPos) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1)) || (!pPos)) + return osl_File_E_INVAL; + + // no need to lock because pos is atomic + *pPos = pImpl->getPos(); + + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_setFilePos(oslFileHandle Handle, sal_uInt32 uHow, sal_Int64 uOffset) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1))) + return osl_File_E_INVAL; + + if (exceedsMaxOffT(uOffset) || exceedsMinOffT(uOffset)) + return osl_File_E_OVERFLOW; + + off_t nPos = 0, nOffset = sal::static_int_cast< off_t >(uOffset); + + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + switch (uHow) + { + case osl_Pos_Absolut: + if (nOffset < 0) + return osl_File_E_INVAL; + break; + + case osl_Pos_Current: + nPos = sal::static_int_cast< off_t >(pImpl->getPos()); + if ((nOffset < 0) && (nPos < -1*nOffset)) + return osl_File_E_INVAL; + + assert(nPos >= 0); + if (nOffset > MAX_OFF_T - nPos) + return osl_File_E_OVERFLOW; + break; + + case osl_Pos_End: + nPos = sal::static_int_cast< off_t >(pImpl->getSize()); + if ((nOffset < 0) && (nPos < -1*nOffset)) + return osl_File_E_INVAL; + + assert(nPos >= 0); + if (nOffset > MAX_OFF_T - nPos) + return osl_File_E_OVERFLOW; + break; + + default: + return osl_File_E_INVAL; + } + + pImpl->setPos(nPos + nOffset); + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_getFileSize(oslFileHandle Handle, sal_uInt64* pSize) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if ((!pImpl) || ((pImpl->m_kind == FileHandle_Impl::KIND_FD) && (pImpl->m_fd == -1)) || (!pSize)) + return osl_File_E_INVAL; + + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + *pSize = pImpl->getSize(); + + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_setFileSize(oslFileHandle Handle, sal_uInt64 uSize) +{ + FileHandle_Impl* pImpl = static_cast< FileHandle_Impl* >(Handle); + + if ((!pImpl) || (pImpl->m_fd == -1)) + return osl_File_E_INVAL; + + if (!(pImpl->m_state & State::Writeable)) + return osl_File_E_BADF; + + if (exceedsMaxOffT(uSize)) + return osl_File_E_OVERFLOW; + + oslFileError result = pImpl->syncFile(); + if (result != osl_File_E_None) + return result; + + pImpl->m_bufptr = -1; + pImpl->m_buflen = 0; + + return pImpl->setSize(uSize); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |