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-rw-r--r--xpcom/io/nsLocalFileCommon.cpp328
1 files changed, 328 insertions, 0 deletions
diff --git a/xpcom/io/nsLocalFileCommon.cpp b/xpcom/io/nsLocalFileCommon.cpp
new file mode 100644
index 000000000..8fbb7227d
--- /dev/null
+++ b/xpcom/io/nsLocalFileCommon.cpp
@@ -0,0 +1,328 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#include "nsIServiceManager.h"
+
+#include "nsLocalFile.h" // includes platform-specific headers
+
+#include "nsString.h"
+#include "nsCOMPtr.h"
+#include "nsReadableUtils.h"
+#include "nsPrintfCString.h"
+#include "nsCRT.h"
+#include "nsNativeCharsetUtils.h"
+#include "nsUTF8Utils.h"
+
+#ifdef XP_WIN
+#include <string.h>
+#endif
+
+
+void
+NS_StartupLocalFile()
+{
+ nsLocalFile::GlobalInit();
+}
+
+void
+NS_ShutdownLocalFile()
+{
+ nsLocalFile::GlobalShutdown();
+}
+
+#if !defined(MOZ_WIDGET_COCOA) && !defined(XP_WIN)
+NS_IMETHODIMP
+nsLocalFile::InitWithFile(nsIFile* aFile)
+{
+ if (NS_WARN_IF(!aFile)) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ nsAutoCString path;
+ aFile->GetNativePath(path);
+ if (path.IsEmpty()) {
+ return NS_ERROR_INVALID_ARG;
+ }
+ return InitWithNativePath(path);
+}
+#endif
+
+#define kMaxFilenameLength 255
+#define kMaxExtensionLength 100
+#define kMaxSequenceNumberLength 5 // "-9999"
+// requirement: kMaxExtensionLength < kMaxFilenameLength - kMaxSequenceNumberLength
+
+NS_IMETHODIMP
+nsLocalFile::CreateUnique(uint32_t aType, uint32_t aAttributes)
+{
+ nsresult rv;
+ bool longName;
+
+#ifdef XP_WIN
+ nsAutoString pathName, leafName, rootName, suffix;
+ rv = GetPath(pathName);
+#else
+ nsAutoCString pathName, leafName, rootName, suffix;
+ rv = GetNativePath(pathName);
+#endif
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ longName = (pathName.Length() + kMaxSequenceNumberLength >
+ kMaxFilenameLength);
+ if (!longName) {
+ rv = Create(aType, aAttributes);
+ if (rv != NS_ERROR_FILE_ALREADY_EXISTS) {
+ return rv;
+ }
+ }
+
+#ifdef XP_WIN
+ rv = GetLeafName(leafName);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ const int32_t lastDot = leafName.RFindChar(char16_t('.'));
+#else
+ rv = GetNativeLeafName(leafName);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ const int32_t lastDot = leafName.RFindChar('.');
+#endif
+
+ if (lastDot == kNotFound) {
+ rootName = leafName;
+ } else {
+ suffix = Substring(leafName, lastDot); // include '.'
+ rootName = Substring(leafName, 0, lastDot); // strip suffix and dot
+ }
+
+ if (longName) {
+ int32_t maxRootLength = (kMaxFilenameLength -
+ (pathName.Length() - leafName.Length()) -
+ suffix.Length() - kMaxSequenceNumberLength);
+
+ // We cannot create an item inside a directory whose name is too long.
+ // Also, ensure that at least one character remains after we truncate
+ // the root name, as we don't want to end up with an empty leaf name.
+ if (maxRootLength < 2) {
+ return NS_ERROR_FILE_UNRECOGNIZED_PATH;
+ }
+
+#ifdef XP_WIN
+ // ensure that we don't cut the name in mid-UTF16-character
+ rootName.SetLength(NS_IS_LOW_SURROGATE(rootName[maxRootLength]) ?
+ maxRootLength - 1 : maxRootLength);
+ SetLeafName(rootName + suffix);
+#else
+ if (NS_IsNativeUTF8()) {
+ // ensure that we don't cut the name in mid-UTF8-character
+ // (assume the name is valid UTF8 to begin with)
+ while (UTF8traits::isInSeq(rootName[maxRootLength])) {
+ --maxRootLength;
+ }
+
+ // Another check to avoid ending up with an empty leaf name.
+ if (maxRootLength == 0 && suffix.IsEmpty()) {
+ return NS_ERROR_FILE_UNRECOGNIZED_PATH;
+ }
+ }
+
+ rootName.SetLength(maxRootLength);
+ SetNativeLeafName(rootName + suffix);
+#endif
+ nsresult rvCreate = Create(aType, aAttributes);
+ if (rvCreate != NS_ERROR_FILE_ALREADY_EXISTS) {
+ return rvCreate;
+ }
+ }
+
+ for (int indx = 1; indx < 10000; ++indx) {
+ // start with "Picture-1.jpg" after "Picture.jpg" exists
+#ifdef XP_WIN
+ SetLeafName(rootName +
+ NS_ConvertASCIItoUTF16(nsPrintfCString("-%d", indx)) +
+ suffix);
+#else
+ SetNativeLeafName(rootName + nsPrintfCString("-%d", indx) + suffix);
+#endif
+ rv = Create(aType, aAttributes);
+ if (NS_SUCCEEDED(rv) || rv != NS_ERROR_FILE_ALREADY_EXISTS) {
+ return rv;
+ }
+ }
+
+ // The disk is full, sort of
+ return NS_ERROR_FILE_TOO_BIG;
+}
+
+#if defined(XP_WIN)
+static const char16_t kPathSeparatorChar = '\\';
+#elif defined(XP_UNIX)
+static const char16_t kPathSeparatorChar = '/';
+#else
+#error Need to define file path separator for your platform
+#endif
+
+static void
+SplitPath(char16_t* aPath, nsTArray<char16_t*>& aNodeArray)
+{
+ if (*aPath == 0) {
+ return;
+ }
+
+ if (*aPath == kPathSeparatorChar) {
+ aPath++;
+ }
+ aNodeArray.AppendElement(aPath);
+
+ for (char16_t* cp = aPath; *cp != 0; ++cp) {
+ if (*cp == kPathSeparatorChar) {
+ *cp++ = 0;
+ if (*cp == 0) {
+ break;
+ }
+ aNodeArray.AppendElement(cp);
+ }
+ }
+}
+
+
+NS_IMETHODIMP
+nsLocalFile::GetRelativeDescriptor(nsIFile* aFromFile, nsACString& aResult)
+{
+ if (NS_WARN_IF(!aFromFile)) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ //
+ // aResult will be UTF-8 encoded
+ //
+
+ nsresult rv;
+ aResult.Truncate(0);
+
+ nsAutoString thisPath, fromPath;
+ AutoTArray<char16_t*, 32> thisNodes;
+ AutoTArray<char16_t*, 32> fromNodes;
+
+ rv = GetPath(thisPath);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ rv = aFromFile->GetPath(fromPath);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ // get raw pointer to mutable string buffer
+ char16_t* thisPathPtr;
+ thisPath.BeginWriting(thisPathPtr);
+ char16_t* fromPathPtr;
+ fromPath.BeginWriting(fromPathPtr);
+
+ SplitPath(thisPathPtr, thisNodes);
+ SplitPath(fromPathPtr, fromNodes);
+
+ size_t nodeIndex;
+ for (nodeIndex = 0;
+ nodeIndex < thisNodes.Length() && nodeIndex < fromNodes.Length();
+ ++nodeIndex) {
+#ifdef XP_WIN
+ if (_wcsicmp(char16ptr_t(thisNodes[nodeIndex]),
+ char16ptr_t(fromNodes[nodeIndex]))) {
+ break;
+ }
+#else
+ if (nsCRT::strcmp(thisNodes[nodeIndex], fromNodes[nodeIndex])) {
+ break;
+ }
+#endif
+ }
+
+ size_t branchIndex = nodeIndex;
+ for (nodeIndex = branchIndex; nodeIndex < fromNodes.Length(); ++nodeIndex) {
+ aResult.AppendLiteral("../");
+ }
+ for (nodeIndex = branchIndex; nodeIndex < thisNodes.Length(); ++nodeIndex) {
+ NS_ConvertUTF16toUTF8 nodeStr(thisNodes[nodeIndex]);
+ aResult.Append(nodeStr);
+ if (nodeIndex + 1 < thisNodes.Length()) {
+ aResult.Append('/');
+ }
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::SetRelativeDescriptor(nsIFile* aFromFile,
+ const nsACString& aRelativeDesc)
+{
+ NS_NAMED_LITERAL_CSTRING(kParentDirStr, "../");
+
+ nsCOMPtr<nsIFile> targetFile;
+ nsresult rv = aFromFile->Clone(getter_AddRefs(targetFile));
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ //
+ // aRelativeDesc is UTF-8 encoded
+ //
+
+ nsCString::const_iterator strBegin, strEnd;
+ aRelativeDesc.BeginReading(strBegin);
+ aRelativeDesc.EndReading(strEnd);
+
+ nsCString::const_iterator nodeBegin(strBegin), nodeEnd(strEnd);
+ nsCString::const_iterator pos(strBegin);
+
+ nsCOMPtr<nsIFile> parentDir;
+ while (FindInReadable(kParentDirStr, nodeBegin, nodeEnd)) {
+ rv = targetFile->GetParent(getter_AddRefs(parentDir));
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ if (!parentDir) {
+ return NS_ERROR_FILE_UNRECOGNIZED_PATH;
+ }
+ targetFile = parentDir;
+
+ nodeBegin = nodeEnd;
+ pos = nodeEnd;
+ nodeEnd = strEnd;
+ }
+
+ nodeBegin = nodeEnd = pos;
+ while (nodeEnd != strEnd) {
+ FindCharInReadable('/', nodeEnd, strEnd);
+ targetFile->Append(NS_ConvertUTF8toUTF16(Substring(nodeBegin, nodeEnd)));
+ if (nodeEnd != strEnd) { // If there's more left in the string, inc over the '/' nodeEnd is on.
+ ++nodeEnd;
+ }
+ nodeBegin = nodeEnd;
+ }
+
+ return InitWithFile(targetFile);
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetRelativePath(nsIFile* aFromFile, nsACString& aResult)
+{
+ return GetRelativeDescriptor(aFromFile, aResult);
+}
+
+NS_IMETHODIMP
+nsLocalFile::SetRelativePath(nsIFile* aFromFile,
+ const nsACString& aRelativePath)
+{
+ return SetRelativeDescriptor(aFromFile, aRelativePath);
+}