gecko-dev/xpcom/build/FileLocation.cpp

206 lines
4.3 KiB
C++

/* 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 "FileLocation.h"
#include "nsZipArchive.h"
#include "nsURLHelper.h"
namespace mozilla {
FileLocation::FileLocation()
{
}
FileLocation::~FileLocation()
{
}
FileLocation::FileLocation(nsIFile* file)
{
Init(file);
}
FileLocation::FileLocation(nsIFile* file, const char *path)
{
Init(file, path);
}
FileLocation::FileLocation(const FileLocation &file, const char *path)
{
if (file.IsZip()) {
if (file.mBaseFile) {
Init(file.mBaseFile, file.mPath.get());
} else {
Init(file.mBaseZip, file.mPath.get());
}
if (path) {
int32_t i = mPath.RFindChar('/');
if (kNotFound == i) {
mPath.Truncate(0);
} else {
mPath.Truncate(i + 1);
}
mPath += path;
}
} else {
if (path) {
nsCOMPtr<nsIFile> cfile;
file.mBaseFile->GetParent(getter_AddRefs(cfile));
#if defined(XP_WIN)
nsAutoCString pathStr(path);
char *p;
uint32_t len = pathStr.GetMutableData(&p);
for (; len; ++p, --len) {
if ('/' == *p) {
*p = '\\';
}
}
cfile->AppendRelativeNativePath(pathStr);
#else
cfile->AppendRelativeNativePath(nsDependentCString(path));
#endif
Init(cfile);
} else {
Init(file.mBaseFile);
}
}
}
void
FileLocation::Init(nsIFile* file)
{
mBaseZip = nullptr;
mBaseFile = file;
mPath.Truncate();
}
void
FileLocation::Init(nsIFile* file, const char* path)
{
mBaseZip = nullptr;
mBaseFile = file;
mPath = path;
}
void
FileLocation::Init(nsZipArchive* zip, const char* path)
{
mBaseZip = zip;
mBaseFile = nullptr;
mPath = path;
}
void
FileLocation::GetURIString(nsACString &result) const
{
if (mBaseFile) {
net_GetURLSpecFromActualFile(mBaseFile, result);
} else if (mBaseZip) {
nsRefPtr<nsZipHandle> handler = mBaseZip->GetFD();
handler->mFile.GetURIString(result);
}
if (IsZip()) {
result.Insert("jar:", 0);
result += "!/";
result += mPath;
}
}
already_AddRefed<nsIFile>
FileLocation::GetBaseFile()
{
if (IsZip() && mBaseZip) {
nsRefPtr<nsZipHandle> handler = mBaseZip->GetFD();
if (handler)
return handler->mFile.GetBaseFile();
return nullptr;
}
nsCOMPtr<nsIFile> file = mBaseFile;
return file.forget();
}
bool
FileLocation::Equals(const FileLocation &file) const
{
if (mPath != file.mPath)
return false;
if (mBaseFile && file.mBaseFile) {
bool eq;
return NS_SUCCEEDED(mBaseFile->Equals(file.mBaseFile, &eq)) && eq;
}
const FileLocation *a = this, *b = &file;
if (a->mBaseZip) {
nsRefPtr<nsZipHandle> handler = a->mBaseZip->GetFD();
a = &handler->mFile;
}
if (b->mBaseZip) {
nsRefPtr<nsZipHandle> handler = b->mBaseZip->GetFD();
b = &handler->mFile;
}
return a->Equals(*b);
}
nsresult
FileLocation::GetData(Data &data)
{
if (!IsZip()) {
return mBaseFile->OpenNSPRFileDesc(PR_RDONLY, 0444, &data.mFd.rwget());
}
data.mZip = mBaseZip;
if (!data.mZip) {
data.mZip = new nsZipArchive();
data.mZip->OpenArchive(mBaseFile);
}
data.mItem = data.mZip->GetItem(mPath.get());
if (data.mItem)
return NS_OK;
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
nsresult
FileLocation::Data::GetSize(uint32_t *result)
{
if (mFd) {
PRFileInfo64 fileInfo;
if (PR_SUCCESS != PR_GetOpenFileInfo64(mFd, &fileInfo))
return NS_ErrorAccordingToNSPR();
if (fileInfo.size > int64_t(UINT32_MAX))
return NS_ERROR_FILE_TOO_BIG;
*result = fileInfo.size;
return NS_OK;
} else if (mItem) {
*result = mItem->RealSize();
return NS_OK;
}
return NS_ERROR_NOT_INITIALIZED;
}
nsresult
FileLocation::Data::Copy(char *buf, uint32_t len)
{
if (mFd) {
for (uint32_t totalRead = 0; totalRead < len; ) {
int32_t read = PR_Read(mFd, buf + totalRead, XPCOM_MIN(len - totalRead, uint32_t(INT32_MAX)));
if (read < 0)
return NS_ErrorAccordingToNSPR();
totalRead += read;
}
return NS_OK;
} else if (mItem) {
nsZipCursor cursor(mItem, mZip, reinterpret_cast<uint8_t *>(buf), len, true);
uint32_t readLen;
cursor.Copy(&readLen);
return (readLen == len) ? NS_OK : NS_ERROR_FILE_CORRUPTED;
}
return NS_ERROR_NOT_INITIALIZED;
}
} /* namespace mozilla */