Archive.cc

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
#include "pedigree/kernel/Archive.h"
#include "pedigree/kernel/Log.h"
#include "pedigree/kernel/panic.h"
#include "pedigree/kernel/processor/PhysicalMemoryManager.h"
#include "pedigree/kernel/processor/VirtualAddressSpace.h"
#include "pedigree/kernel/utilities/StaticString.h"
#include "pedigree/kernel/utilities/utility.h"
 
Archive::Archive(uint8_t* pPhys, size_t sSize) : m_pBase(pPhys), m_Region("Archive") {
  EMIT_IF(!HOSTED) {
    if ((reinterpret_cast<physical_uintptr_t>(pPhys) &
         (PhysicalMemoryManager::getPageSize() - 1)) != 0)
      panic("Archive: Alignment issues");
 
    if (PhysicalMemoryManager::instance().allocateRegion(
            m_Region,
            (sSize + PhysicalMemoryManager::getPageSize() - 1) /
                PhysicalMemoryManager::getPageSize(),
            PhysicalMemoryManager::continuous, VirtualAddressSpace::KernelMode,
            reinterpret_cast<physical_uintptr_t>(pPhys)) == false) {
      ERROR("Archive: allocateRegion failed.");
    } else {
      NOTICE("Archive: mapped to " << m_Region.virtualAddress());
    }
  }
}
 
Archive::~Archive() {
  m_Region.free();
}
 
size_t Archive::getNumFiles() {
  size_t i = 0;
  ArchiveFile* pFile = getFirst();
  while (pFile != 0) {
    i++;
    pFile = getNext(pFile);
  }
  return i;
}
 
size_t Archive::getFileSize(size_t n) {
  ArchiveFile* pFile = get(n);
  NormalStaticString str(pFile->size);
  return str.intValue(8);  // Octal
}
 
char* Archive::getFileName(size_t n) {
  return get(n)->name;
}
 
uintptr_t* Archive::getFile(size_t n) {
  return reinterpret_cast<uintptr_t*>(reinterpret_cast<uintptr_t>(get(n)) + 512);
}
 
Archive::ArchiveFile* Archive::getFirst() {
  EMIT_IF(HOSTED) {
    return reinterpret_cast<ArchiveFile*>(m_pBase);
  }
  else {
    return reinterpret_cast<ArchiveFile*>(m_Region.virtualAddress());
  }
}
 
Archive::ArchiveFile* Archive::getNext(ArchiveFile* pFile) {
  NormalStaticString str(pFile->size);
  size_t size = str.intValue(8);  // Octal.
  size_t nBlocks = (size + 511) / 512;
  pFile = adjust_pointer(pFile, 512 * (nBlocks + 1));
  if (pFile->name[0] == '\0')
    return 0;
  return pFile;
}
 
Archive::ArchiveFile* Archive::get(size_t n) {
  ArchiveFile* pFile = getFirst();
  for (size_t i = 0; i < n; i++)
    pFile = getNext(pFile);
  return pFile;
}