xpcom/build/FileLocation.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "FileLocation.h"
   6 #include "nsZipArchive.h"
   7 #include "nsURLHelper.h"
   8
   9 namespace mozilla {
  10
  11 FileLocation::FileLocation()
  12 {
  13 }
  14
  15 FileLocation::~FileLocation()
  16 {
  17 }
  18
  19 FileLocation::FileLocation(nsIFile* file)
  20 {
  21   Init(file);
  22 }
  23
  24 FileLocation::FileLocation(nsIFile* file, const char *path)
  25 {
  26   Init(file, path);
  27 }
  28
  29 FileLocation::FileLocation(const FileLocation &file, const char *path)
  30 {
  31   if (file.IsZip()) {
  32     if (file.mBaseFile) {
  33       Init(file.mBaseFile, file.mPath.get());
  34     } else {
  35       Init(file.mBaseZip, file.mPath.get());
  36     }
  37     if (path) {
  38       int32_t i = mPath.RFindChar('/');
  39       if (kNotFound == i) {
  40         mPath.Truncate(0);
  41       } else {
  42         mPath.Truncate(i + 1);
  43       }
  44       mPath += path;
  45     }
  46   } else {
  47     if (path) {
  48       nsCOMPtr<nsIFile> cfile;
  49       file.mBaseFile->GetParent(getter_AddRefs(cfile));
  50
  51 #if defined(XP_WIN)
  52       nsAutoCString pathStr(path);
  53       char *p;
  54       uint32_t len = pathStr.GetMutableData(&p);
  55       for (; len; ++p, --len) {
  56         if ('/' == *p) {
  57             *p = '\\';
  58         }
  59       }
  60       cfile->AppendRelativeNativePath(pathStr);
  61 #else
  62       cfile->AppendRelativeNativePath(nsDependentCString(path));
  63 #endif
  64       Init(cfile);
  65     } else {
  66       Init(file.mBaseFile);
  67     }
  68   }
  69 }
  70
  71 void
  72 FileLocation::Init(nsIFile* file)
  73 {
  74   mBaseZip = nullptr;
  75   mBaseFile = file;
  76   mPath.Truncate();
  77 }
  78
  79 void
  80 FileLocation::Init(nsIFile* file, const char* path)
  81 {
  82   mBaseZip = nullptr;
  83   mBaseFile = file;
  84   mPath = path;
  85 }
  86
  87 void
  88 FileLocation::Init(nsZipArchive* zip, const char* path)
  89 {
  90   mBaseZip = zip;
  91   mBaseFile = nullptr;
  92   mPath = path;
  93 }
  94
  95 void
  96 FileLocation::GetURIString(nsACString &result) const
  97 {
  98   if (mBaseFile) {
  99     net_GetURLSpecFromActualFile(mBaseFile, result);
 100   } else if (mBaseZip) {
 101     nsRefPtr<nsZipHandle> handler = mBaseZip->GetFD();
 102     handler->mFile.GetURIString(result);
 103   }
 104   if (IsZip()) {
 105     result.Insert("jar:", 0);
 106     result += "!/";
 107     result += mPath;
 108   }
 109 }
 110
 111 already_AddRefed<nsIFile>
 112 FileLocation::GetBaseFile()
 113 {
 114   if (IsZip() && mBaseZip) {
 115     nsRefPtr<nsZipHandle> handler = mBaseZip->GetFD();
 116     if (handler)
 117       return handler->mFile.GetBaseFile();
 118     return nullptr;
 119   }
 120
 121   nsCOMPtr<nsIFile> file = mBaseFile;
 122   return file.forget();
 123 }
 124
 125 bool
 126 FileLocation::Equals(const FileLocation &file) const
 127 {
 128   if (mPath != file.mPath)
 129     return false;
 130
 131   if (mBaseFile && file.mBaseFile) {
 132     bool eq;
 133     return NS_SUCCEEDED(mBaseFile->Equals(file.mBaseFile, &eq)) && eq;
 134   }
 135
 136   const FileLocation *a = this, *b = &file;
 137   if (a->mBaseZip) {
 138     nsRefPtr<nsZipHandle> handler = a->mBaseZip->GetFD();
 139     a = &handler->mFile;
 140   }
 141   if (b->mBaseZip) {
 142     nsRefPtr<nsZipHandle> handler = b->mBaseZip->GetFD();
 143     b = &handler->mFile;
 144   }
 145   return a->Equals(*b);
 146 }
 147
 148 nsresult
 149 FileLocation::GetData(Data &data)
 150 {
 151   if (!IsZip()) {
 152     return mBaseFile->OpenNSPRFileDesc(PR_RDONLY, 0444, &data.mFd.rwget());
 153   }
 154   data.mZip = mBaseZip;
 155   if (!data.mZip) {
 156     data.mZip = new nsZipArchive();
 157     data.mZip->OpenArchive(mBaseFile);
 158   }
 159   data.mItem = data.mZip->GetItem(mPath.get());
 160   if (data.mItem)
 161     return NS_OK;
 162   return NS_ERROR_FILE_UNRECOGNIZED_PATH;
 163 }
 164
 165 nsresult
 166 FileLocation::Data::GetSize(uint32_t *result)
 167 {
 168   if (mFd) {
 169     PRFileInfo64 fileInfo;
 170     if (PR_SUCCESS != PR_GetOpenFileInfo64(mFd, &fileInfo))
 171       return NS_ErrorAccordingToNSPR();
 172
 173     if (fileInfo.size > int64_t(UINT32_MAX))
 174       return NS_ERROR_FILE_TOO_BIG;
 175
 176     *result = fileInfo.size;
 177     return NS_OK;
 178   } else if (mItem) {
 179     *result = mItem->RealSize();
 180     return NS_OK;
 181   }
 182   return NS_ERROR_NOT_INITIALIZED;
 183 }
 184
 185 nsresult
 186 FileLocation::Data::Copy(char *buf, uint32_t len)
 187 {
 188   if (mFd) {
 189     for (uint32_t totalRead = 0; totalRead < len; ) {
 190       int32_t read = PR_Read(mFd, buf + totalRead, XPCOM_MIN(len - totalRead, uint32_t(INT32_MAX)));
 191       if (read < 0)
 192         return NS_ErrorAccordingToNSPR();
 193       totalRead += read;
 194     }
 195     return NS_OK;
 196   } else if (mItem) {
 197     nsZipCursor cursor(mItem, mZip, reinterpret_cast<uint8_t *>(buf), len, true);
 198     uint32_t readLen;
 199     cursor.Copy(&readLen);
 200     return (readLen == len) ? NS_OK : NS_ERROR_FILE_CORRUPTED;
 201   }
 202   return NS_ERROR_NOT_INITIALIZED;
 203 }
 204
 205 } /* namespace mozilla */