mirror of
https://github.com/corda/corda.git
synced 2025-01-07 13:38:47 +00:00
446c09dd33
The File.length() method was returning a signed 32-bit value on 32-bit Windows systems. This was causing an integer overflow on file sizes greater than 2 GB. This appears to be caused by the way Windows handles the STAT() function. This patch checks whether the current platform is Windows then uses the Windows API to get the correct file size and return it as a jlong.
745 lines
16 KiB
C++
745 lines
16 KiB
C++
/* Copyright (c) 2008-2011, Avian Contributors
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Permission to use, copy, modify, and/or distribute this software
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for any purpose with or without fee is hereby granted, provided
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that the above copyright notice and this permission notice appear
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in all copies.
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There is NO WARRANTY for this software. See license.txt for
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details. */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include "jni.h"
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#include "jni-util.h"
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#ifdef PLATFORM_WINDOWS
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# include <windows.h>
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# include <io.h>
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# include <direct.h>
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# include <share.h>
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# define ACCESS _waccess
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# define CLOSE _close
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# define READ _read
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# define WRITE _write
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# define STAT _wstat
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# define STRUCT_STAT struct _stat
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# define MKDIR(path, mode) _wmkdir(path)
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# define UNLINK _wunlink
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# define RENAME _wrename
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# define OPEN_MASK O_BINARY
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# ifdef _MSC_VER
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# define S_ISREG(x) ((x) & _S_IFREG)
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# define S_ISDIR(x) ((x) & _S_IFDIR)
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# define S_IRUSR _S_IREAD
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# define S_IWUSR _S_IWRITE
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# define W_OK 2
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# define R_OK 4
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# else
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# define OPEN _wopen
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# define CREAT _wcreat
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# endif
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# define GET_CHARS GetStringChars
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# define RELEASE_CHARS(path, chars) ReleaseStringChars(path, reinterpret_cast<const jchar*>(chars))
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typedef wchar_t char_t;
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#else // not PLATFORM_WINDOWS
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# include <dirent.h>
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# include <unistd.h>
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# include "sys/mman.h"
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# define ACCESS access
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# define OPEN open
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# define CLOSE close
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# define READ read
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# define WRITE write
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# define STAT stat
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# define STRUCT_STAT struct stat
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# define MKDIR mkdir
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# define CREAT creat
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# define UNLINK unlink
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# define RENAME rename
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# define OPEN_MASK 0
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# define GET_CHARS GetStringUTFChars
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# define RELEASE_CHARS ReleaseStringUTFChars
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typedef char char_t;
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#endif // not PLATFORM_WINDOWS
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inline void* operator new(size_t, void* p) throw() { return p; }
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typedef const char_t* string_t;
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namespace {
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#ifdef _MSC_VER
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inline int
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OPEN(string_t path, int mask, int mode)
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{
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int fd;
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if (_wsopen_s(&fd, path, mask, _SH_DENYNO, mode) == 0) {
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return fd;
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} else {
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return -1;
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}
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}
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inline int
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CREAT(string_t path, int mode)
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{
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return OPEN(path, _O_CREAT, mode);
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}
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#endif
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inline bool
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exists(string_t path)
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{
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STRUCT_STAT s;
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return STAT(path, &s) == 0;
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}
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inline int
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doOpen(JNIEnv* e, string_t path, int mask)
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{
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int fd = OPEN(path, mask | OPEN_MASK, S_IRUSR | S_IWUSR);
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if (fd == -1) {
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if (errno == ENOENT) {
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throwNewErrno(e, "java/io/FileNotFoundException");
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} else {
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throwNewErrno(e, "java/io/IOException");
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}
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}
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return fd;
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}
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inline void
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doClose(JNIEnv* e, jint fd)
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{
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int r = CLOSE(fd);
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if (r == -1) {
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throwNewErrno(e, "java/io/IOException");
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}
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}
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inline int
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doRead(JNIEnv* e, jint fd, jbyte* data, jint length)
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{
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int r = READ(fd, data, length);
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if (r > 0) {
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return r;
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} else if (r == 0) {
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return -1;
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} else {
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throwNewErrno(e, "java/io/IOException");
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return 0;
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}
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}
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inline void
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doWrite(JNIEnv* e, jint fd, const jbyte* data, jint length)
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{
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int r = WRITE(fd, data, length);
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if (r != length) {
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throwNewErrno(e, "java/io/IOException");
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}
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}
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#ifdef PLATFORM_WINDOWS
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class Mapping {
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public:
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Mapping(uint8_t* start, size_t length, HANDLE mapping, HANDLE file):
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start(start),
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length(length),
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mapping(mapping),
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file(file)
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{ }
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uint8_t* start;
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size_t length;
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HANDLE mapping;
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HANDLE file;
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};
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inline Mapping*
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map(JNIEnv* e, string_t path)
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{
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Mapping* result = 0;
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HANDLE file = CreateFileW(path, FILE_READ_DATA, FILE_SHARE_READ, 0,
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OPEN_EXISTING, 0, 0);
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if (file != INVALID_HANDLE_VALUE) {
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unsigned size = GetFileSize(file, 0);
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if (size != INVALID_FILE_SIZE) {
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HANDLE mapping = CreateFileMapping(file, 0, PAGE_READONLY, 0, size, 0);
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if (mapping) {
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void* data = MapViewOfFile(mapping, FILE_MAP_READ, 0, 0, 0);
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if (data) {
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void* p = allocate(e, sizeof(Mapping));
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if (not e->ExceptionCheck()) {
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result = new (p)
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Mapping(static_cast<uint8_t*>(data), size, file, mapping);
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}
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}
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if (result == 0) {
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CloseHandle(mapping);
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}
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}
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}
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if (result == 0) {
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CloseHandle(file);
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}
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}
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if (result == 0 and not e->ExceptionCheck()) {
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throwNew(e, "java/io/IOException", "%d", GetLastError());
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}
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return result;
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}
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inline void
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unmap(JNIEnv*, Mapping* mapping)
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{
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UnmapViewOfFile(mapping->start);
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CloseHandle(mapping->mapping);
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CloseHandle(mapping->file);
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free(mapping);
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}
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class Directory {
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public:
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Directory(): handle(0), findNext(false) { }
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virtual string_t next() {
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if (handle and handle != INVALID_HANDLE_VALUE) {
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if (findNext) {
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if (FindNextFileW(handle, &data)) {
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return data.cFileName;
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}
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} else {
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findNext = true;
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return data.cFileName;
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}
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}
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return 0;
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}
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virtual void dispose() {
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if (handle and handle != INVALID_HANDLE_VALUE) {
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FindClose(handle);
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}
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free(this);
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}
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HANDLE handle;
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WIN32_FIND_DATAW data;
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bool findNext;
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};
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#else // not PLATFORM_WINDOWS
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class Mapping {
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public:
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Mapping(uint8_t* start, size_t length):
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start(start),
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length(length)
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{ }
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uint8_t* start;
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size_t length;
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};
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inline Mapping*
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map(JNIEnv* e, string_t path)
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{
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Mapping* result = 0;
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int fd = open(path, O_RDONLY);
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if (fd != -1) {
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struct stat s;
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int r = fstat(fd, &s);
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if (r != -1) {
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void* data = mmap(0, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
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if (data) {
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void* p = allocate(e, sizeof(Mapping));
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if (not e->ExceptionCheck()) {
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result = new (p) Mapping(static_cast<uint8_t*>(data), s.st_size);
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}
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}
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}
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close(fd);
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}
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if (result == 0 and not e->ExceptionCheck()) {
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throwNewErrno(e, "java/io/IOException");
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}
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return result;
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}
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inline void
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unmap(JNIEnv*, Mapping* mapping)
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{
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munmap(mapping->start, mapping->length);
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free(mapping);
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}
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#endif // not PLATFORM_WINDOWS
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} // namespace
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inline string_t getChars(JNIEnv* e, jstring path) {
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return reinterpret_cast<string_t>(e->GET_CHARS(path, 0));
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}
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inline void releaseChars(JNIEnv* e, jstring path, string_t chars) {
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e->RELEASE_CHARS(path, chars);
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}
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extern "C" JNIEXPORT jstring JNICALL
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Java_java_io_File_toCanonicalPath(JNIEnv* /*e*/, jclass, jstring path)
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{
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// todo
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return path;
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}
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extern "C" JNIEXPORT jstring JNICALL
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Java_java_io_File_toAbsolutePath(JNIEnv* e UNUSED, jclass, jstring path)
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{
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#ifdef PLATFORM_WINDOWS
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// todo
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return path;
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#else
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jstring result = path;
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string_t chars = getChars(e, path);
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if (chars) {
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if (chars[0] != '/') {
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char* cwd = getcwd(NULL, 0);
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if (cwd) {
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unsigned size = strlen(cwd) + strlen(chars) + 2;
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RUNTIME_ARRAY(char, buffer, size);
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snprintf(RUNTIME_ARRAY_BODY(buffer), size, "%s/%s", cwd, chars);
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result = e->NewStringUTF(RUNTIME_ARRAY_BODY(buffer));
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free(cwd);
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}
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}
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releaseChars(e, path, chars);
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}
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return result;
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#endif
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}
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extern "C" JNIEXPORT jlong JNICALL
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Java_java_io_File_length(JNIEnv* e, jclass, jstring path)
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{
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#ifdef PLATFORM_WINDOWS
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LARGE_INTEGER fileSize;
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HANDLE file = CreateFileW((wchar_t *)e->GetStringChars(path, 0), FILE_READ_DATA, FILE_SHARE_READ, 0,
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OPEN_EXISTING, 0, 0);
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e->ReleaseStringChars(path, 0);
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if (file != INVALID_HANDLE_VALUE)
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GetFileSizeEx(file, &fileSize);
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else return -1;
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CloseHandle(file);
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return (jlong)fileSize.QuadPart;
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#else
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string_t chars = getChars(e, path);
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if (chars) {
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STRUCT_STAT s;
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int r = STAT(chars, &s);
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releaseChars(e, path, chars);
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if (r == 0) {
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return s.st_size;
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}
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}
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#endif
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return 0;
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}
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extern "C" JNIEXPORT void JNICALL
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Java_java_io_File_mkdir(JNIEnv* e, jclass, jstring path)
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{
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string_t chars = getChars(e, path);
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if (chars) {
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if (not exists(chars)) {
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int r = ::MKDIR(chars, 0700);
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if (r != 0) {
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throwNewErrno(e, "java/io/IOException");
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}
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}
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releaseChars(e, path, chars);
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}
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}
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extern "C" JNIEXPORT void JNICALL
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Java_java_io_File_createNewFile(JNIEnv* e, jclass, jstring path)
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{
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string_t chars = getChars(e, path);
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if (chars) {
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if (not exists(chars)) {
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int fd = CREAT(chars, 0600);
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if (fd == -1) {
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throwNewErrno(e, "java/io/IOException");
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} else {
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doClose(e, fd);
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}
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}
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releaseChars(e, path, chars);
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}
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}
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extern "C" JNIEXPORT void JNICALL
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Java_java_io_File_delete(JNIEnv* e, jclass, jstring path)
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{
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string_t chars = getChars(e, path);
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if (chars) {
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int r = UNLINK(chars);
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if (r != 0) {
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throwNewErrno(e, "java/io/IOException");
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}
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releaseChars(e, path, chars);
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}
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}
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extern "C" JNIEXPORT jboolean JNICALL
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Java_java_io_File_canRead(JNIEnv* e, jclass, jstring path)
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{
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string_t chars = getChars(e, path);
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if (chars) {
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int r = ACCESS(chars, R_OK);
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releaseChars(e, path, chars);
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return (r == 0);
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}
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return false;
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}
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extern "C" JNIEXPORT jboolean JNICALL
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Java_java_io_File_canWrite(JNIEnv* e, jclass, jstring path)
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{
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string_t chars = getChars(e, path);
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if (chars) {
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int r = ACCESS(chars, W_OK);
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releaseChars(e, path, chars);
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return (r == 0);
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}
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return false;
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}
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extern "C" JNIEXPORT jboolean JNICALL
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Java_java_io_File_rename(JNIEnv* e, jclass, jstring old, jstring new_)
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{
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string_t oldChars = getChars(e, old);
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string_t newChars = getChars(e, new_);
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if (oldChars) {
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bool v;
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if (newChars) {
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v = RENAME(oldChars, newChars) == 0;
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releaseChars(e, new_, newChars);
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} else {
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v = false;
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}
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releaseChars(e, old, oldChars);
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return v;
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} else {
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return false;
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}
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}
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extern "C" JNIEXPORT jboolean JNICALL
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Java_java_io_File_isDirectory(JNIEnv* e, jclass, jstring path)
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{
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string_t chars = getChars(e, path);
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if (chars) {
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STRUCT_STAT s;
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int r = STAT(chars, &s);
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bool v = (r == 0 and S_ISDIR(s.st_mode));
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releaseChars(e, path, chars);
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return v;
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} else {
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return false;
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}
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}
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extern "C" JNIEXPORT jboolean JNICALL
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Java_java_io_File_isFile(JNIEnv* e, jclass, jstring path)
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{
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string_t chars = getChars(e, path);
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if (chars) {
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STRUCT_STAT s;
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int r = STAT(chars, &s);
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bool v = (r == 0 and S_ISREG(s.st_mode));
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releaseChars(e, path, chars);
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return v;
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} else {
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return false;
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}
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}
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extern "C" JNIEXPORT jboolean JNICALL
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Java_java_io_File_exists(JNIEnv* e, jclass, jstring path)
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{
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string_t chars = getChars(e, path);
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if (chars) {
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bool v = exists(chars);
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releaseChars(e, path, chars);
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return v;
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} else {
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return false;
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}
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}
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#ifdef PLATFORM_WINDOWS
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extern "C" JNIEXPORT jlong JNICALL
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Java_java_io_File_openDir(JNIEnv* e, jclass, jstring path)
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{
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string_t chars = getChars(e, path);
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if (chars) {
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unsigned length = wcslen(chars);
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unsigned size = length * sizeof(char_t);
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RUNTIME_ARRAY(char_t, buffer, length + 3);
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memcpy(RUNTIME_ARRAY_BODY(buffer), chars, size);
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memcpy(RUNTIME_ARRAY_BODY(buffer) + length, L"\\*", 6);
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releaseChars(e, path, chars);
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Directory* d = new (malloc(sizeof(Directory))) Directory;
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d->handle = FindFirstFileW(RUNTIME_ARRAY_BODY(buffer), &(d->data));
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if (d->handle == INVALID_HANDLE_VALUE) {
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d->dispose();
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d = 0;
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}
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return reinterpret_cast<jlong>(d);
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} else {
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return 0;
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}
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}
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extern "C" JNIEXPORT jstring JNICALL
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Java_java_io_File_readDir(JNIEnv* e, jclass, jlong handle)
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{
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Directory* d = reinterpret_cast<Directory*>(handle);
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while (true) {
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string_t s = d->next();
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if (s) {
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if (wcscmp(s, L".") == 0 || wcscmp(s, L"..") == 0) {
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// skip . or .. and try again
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} else {
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return e->NewString(reinterpret_cast<const jchar*>(s), wcslen(s));
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}
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} else {
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return 0;
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}
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}
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}
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extern "C" JNIEXPORT void JNICALL
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Java_java_io_File_closeDir(JNIEnv* , jclass, jlong handle)
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{
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reinterpret_cast<Directory*>(handle)->dispose();
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}
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#else // not PLATFORM_WINDOWS
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|
|
extern "C" JNIEXPORT jlong JNICALL
|
|
Java_java_io_File_openDir(JNIEnv* e, jclass, jstring path)
|
|
{
|
|
string_t chars = getChars(e, path);
|
|
if (chars) {
|
|
jlong handle = reinterpret_cast<jlong>(opendir(chars));
|
|
releaseChars(e, path, chars);
|
|
return handle;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
extern "C" JNIEXPORT jstring JNICALL
|
|
Java_java_io_File_readDir(JNIEnv* e, jclass, jlong handle)
|
|
{
|
|
struct dirent * directoryEntry;
|
|
|
|
if (handle!=0) {
|
|
while (true) {
|
|
directoryEntry = readdir(reinterpret_cast<DIR*>(handle));
|
|
if (directoryEntry == NULL) {
|
|
return NULL;
|
|
} else if (strcmp(directoryEntry->d_name, ".") == 0
|
|
|| strcmp(directoryEntry->d_name, "..") == 0)
|
|
{
|
|
// skip . or .. and try again
|
|
} else {
|
|
return e->NewStringUTF(directoryEntry->d_name);
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
extern "C" JNIEXPORT void JNICALL
|
|
Java_java_io_File_closeDir(JNIEnv* , jclass, jlong handle)
|
|
{
|
|
if (handle!=0) {
|
|
closedir(reinterpret_cast<DIR*>(handle));
|
|
}
|
|
}
|
|
|
|
#endif // not PLATFORM_WINDOWS
|
|
|
|
extern "C" JNIEXPORT jint JNICALL
|
|
Java_java_io_FileInputStream_open(JNIEnv* e, jclass, jstring path)
|
|
{
|
|
string_t chars = getChars(e, path);
|
|
if (chars) {
|
|
int fd = doOpen(e, chars, O_RDONLY);
|
|
releaseChars(e, path, chars);
|
|
return fd;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
extern "C" JNIEXPORT jint JNICALL
|
|
Java_java_io_FileInputStream_read__I(JNIEnv* e, jclass, jint fd)
|
|
{
|
|
jbyte data;
|
|
int r = doRead(e, fd, &data, 1);
|
|
if (r <= 0) {
|
|
return -1;
|
|
} else {
|
|
return data & 0xff;
|
|
}
|
|
}
|
|
|
|
extern "C" JNIEXPORT jint JNICALL
|
|
Java_java_io_FileInputStream_read__I_3BII
|
|
(JNIEnv* e, jclass, jint fd, jbyteArray b, jint offset, jint length)
|
|
{
|
|
jbyte* data = static_cast<jbyte*>(malloc(length));
|
|
if (data == 0) {
|
|
throwNew(e, "java/lang/OutOfMemoryError", 0);
|
|
return 0;
|
|
}
|
|
|
|
int r = doRead(e, fd, data, length);
|
|
|
|
e->SetByteArrayRegion(b, offset, length, data);
|
|
|
|
free(data);
|
|
|
|
return r;
|
|
}
|
|
|
|
extern "C" JNIEXPORT void JNICALL
|
|
Java_java_io_FileInputStream_close(JNIEnv* e, jclass, jint fd)
|
|
{
|
|
doClose(e, fd);
|
|
}
|
|
|
|
extern "C" JNIEXPORT jint JNICALL
|
|
Java_java_io_FileOutputStream_open(JNIEnv* e, jclass, jstring path, jboolean append)
|
|
{
|
|
string_t chars = getChars(e, path);
|
|
if (chars) {
|
|
int fd = doOpen(e, chars, append
|
|
? (O_WRONLY | O_CREAT | O_APPEND)
|
|
: (O_WRONLY | O_CREAT | O_TRUNC));
|
|
releaseChars(e, path, chars);
|
|
return fd;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
extern "C" JNIEXPORT void JNICALL
|
|
Java_java_io_FileOutputStream_write__II(JNIEnv* e, jclass, jint fd, jint c)
|
|
{
|
|
jbyte data = c;
|
|
doWrite(e, fd, &data, 1);
|
|
}
|
|
|
|
extern "C" JNIEXPORT void JNICALL
|
|
Java_java_io_FileOutputStream_write__I_3BII
|
|
(JNIEnv* e, jclass, jint fd, jbyteArray b, jint offset, jint length)
|
|
{
|
|
jbyte* data = static_cast<jbyte*>(malloc(length));
|
|
if (data == 0) {
|
|
throwNew(e, "java/lang/OutOfMemoryError", 0);
|
|
return;
|
|
}
|
|
|
|
e->GetByteArrayRegion(b, offset, length, data);
|
|
|
|
if (not e->ExceptionCheck()) {
|
|
doWrite(e, fd, data, length);
|
|
}
|
|
|
|
free(data);
|
|
}
|
|
|
|
extern "C" JNIEXPORT void JNICALL
|
|
Java_java_io_FileOutputStream_close(JNIEnv* e, jclass, jint fd)
|
|
{
|
|
doClose(e, fd);
|
|
}
|
|
|
|
extern "C" JNIEXPORT void JNICALL
|
|
Java_java_io_RandomAccessFile_open(JNIEnv* e, jclass, jstring path,
|
|
jlongArray result)
|
|
{
|
|
string_t chars = getChars(e, path);
|
|
if (chars) {
|
|
Mapping* mapping = map(e, chars);
|
|
|
|
jlong peer = reinterpret_cast<jlong>(mapping);
|
|
e->SetLongArrayRegion(result, 0, 1, &peer);
|
|
|
|
jlong length = (mapping ? mapping->length : 0);
|
|
e->SetLongArrayRegion(result, 1, 1, &length);
|
|
|
|
releaseChars(e, path, chars);
|
|
}
|
|
}
|
|
|
|
extern "C" JNIEXPORT void JNICALL
|
|
Java_java_io_RandomAccessFile_copy(JNIEnv* e, jclass, jlong peer,
|
|
jlong position, jbyteArray buffer,
|
|
int offset, int length)
|
|
{
|
|
uint8_t* dst = reinterpret_cast<uint8_t*>
|
|
(e->GetPrimitiveArrayCritical(buffer, 0));
|
|
|
|
memcpy(dst + offset,
|
|
reinterpret_cast<Mapping*>(peer)->start + position,
|
|
length);
|
|
|
|
e->ReleasePrimitiveArrayCritical(buffer, dst, 0);
|
|
}
|
|
|
|
extern "C" JNIEXPORT void JNICALL
|
|
Java_java_io_RandomAccessFile_close(JNIEnv* e, jclass, jlong peer)
|
|
{
|
|
unmap(e, reinterpret_cast<Mapping*>(peer));
|
|
}
|