First round of dead file removal

obsolete/breakpad/common/mac/macho_walker.cc

Index: obsolete/breakpad/common/mac/macho_walker.cc
diff --git a/obsolete/breakpad/common/mac/macho_walker.cc b/obsolete/breakpad/common/mac/macho_walker.cc
deleted file mode 100644
index dd2c3b3971ee2b7a08212311fde86ac7e99b86ad..0000000000000000000000000000000000000000
--- a/obsolete/breakpad/common/mac/macho_walker.cc
+++ /dev/null
@@ -1,243 +0,0 @@
-// Copyright (c) 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// macho_walker.cc: Iterate over the load commands in a mach-o file
-//
-// See macho_walker.h for documentation
-//
-// Author: Dan Waylonis
-
-extern "C" {  // necessary for Leopard
-  #include <assert.h>
-  #include <fcntl.h>
-  #include <mach-o/arch.h>
-  #include <mach-o/loader.h>
-  #include <mach-o/swap.h>
-  #include <string.h>
-  #include <unistd.h>
-}
-
-#include "common/mac/macho_walker.h"
-#include "common/mac/macho_utilities.h"
-
-namespace MacFileUtilities {
-
-MachoWalker::MachoWalker(const char *path, LoadCommandCallback callback,
-                         void *context)
-    : callback_(callback),
-      callback_context_(context) {
-  file_ = open(path, O_RDONLY);
-}
-
-MachoWalker::~MachoWalker() {
-  if (file_ != -1)
-    close(file_);
-}
-
-int MachoWalker::ValidateCPUType(int cpu_type) {
-  // If the user didn't specify, try to use the local architecture.  If that
-  // fails, use the base type for the executable.
-  if (cpu_type == 0) {
-    const NXArchInfo *arch = NXGetLocalArchInfo();
-    if (arch)
-      cpu_type = arch->cputype;
-    else
-#if __ppc__
-      cpu_type = CPU_TYPE_POWERPC;
-#elif __i386__
-    cpu_type = CPU_TYPE_X86;
-#else
-#error Unknown architecture -- are you on a PDP-11?
-#endif
-  }
-
-  return cpu_type;
-}
-
-bool MachoWalker::WalkHeader(int cpu_type) {
-  int valid_cpu_type = ValidateCPUType(cpu_type);
-  off_t offset;
-  if (FindHeader(valid_cpu_type, offset)) {
-    if (cpu_type & CPU_ARCH_ABI64)
-      return WalkHeader64AtOffset(offset);
-
-    return WalkHeaderAtOffset(offset);
-  }
-
-  return false;
-}
-
-bool MachoWalker::ReadBytes(void *buffer, size_t size, off_t offset) {
-  return pread(file_, buffer, size, offset) == (ssize_t)size;
-}
-
-bool MachoWalker::CurrentHeader(struct mach_header_64 *header, off_t *offset) {
-  if (current_header_) {
-    memcpy(header, current_header_, sizeof(mach_header_64));
-    *offset = current_header_offset_;
-    return true;
-  }
-  
-  return false;
-}
-
-bool MachoWalker::FindHeader(int cpu_type, off_t &offset) {
-  int valid_cpu_type = ValidateCPUType(cpu_type);
-  // Read the magic bytes that's common amongst all mach-o files
-  uint32_t magic;
-  if (!ReadBytes(&magic, sizeof(magic), 0))
-    return false;
-
-  offset = sizeof(magic);
-
-  // Figure out what type of file we've got
-  bool is_fat = false;
-  if (magic == FAT_MAGIC || magic == FAT_CIGAM) {
-    is_fat = true;    
-  }
-  else if (magic != MH_MAGIC && magic != MH_CIGAM && magic != MH_MAGIC_64 &&
-           magic != MH_CIGAM_64) {
-    return false;
-  }
-
-  if (!is_fat) {
-    // If we don't have a fat header, check if the cpu type matches the single
-    // header
-    cpu_type_t header_cpu_type;
-    if (!ReadBytes(&header_cpu_type, sizeof(header_cpu_type), offset))
-      return false;
-
-    if (magic == MH_CIGAM || magic == MH_CIGAM_64)
-      header_cpu_type = NXSwapInt(header_cpu_type);
-
-    if (valid_cpu_type != header_cpu_type)
-      return false;
-
-    offset = 0;
-    return true;
-  } else {
-    // Read the fat header and find an appropriate architecture
-    offset = 0;
-    struct fat_header fat;
-    if (!ReadBytes(&fat, sizeof(fat), offset))
-      return false;
-
-    if (NXHostByteOrder() != NX_BigEndian)
-      swap_fat_header(&fat, NXHostByteOrder());
-
-    offset += sizeof(fat);
-
-    // Search each architecture for the desired one
-    struct fat_arch arch;
-    for (uint32_t i = 0; i < fat.nfat_arch; ++i) {
-      if (!ReadBytes(&arch, sizeof(arch), offset))
-        return false;
-
-      if (NXHostByteOrder() != NX_BigEndian)
-        swap_fat_arch(&arch, 1, NXHostByteOrder());
-
-      if (arch.cputype == valid_cpu_type) {
-        offset = arch.offset;
-        return true;
-      }
-
-      offset += sizeof(arch);
-    }
-  }
-
-  return false;
-}
-
-bool MachoWalker::WalkHeaderAtOffset(off_t offset) {
-  struct mach_header header;
-  if (!ReadBytes(&header, sizeof(header), offset))
-    return false;
-
-  bool swap = (header.magic == MH_CIGAM);
-  if (swap)
-    swap_mach_header(&header, NXHostByteOrder());
-  
-  // Copy the data into the mach_header_64 structure.  Since the 32-bit and
-  // 64-bit only differ in the last field (reserved), this is safe to do.
-  struct mach_header_64 header64;
-  memcpy((void *)&header64, (const void *)&header, sizeof(header));
-  header64.reserved = 0;
-  
-  current_header_ = &header64;
-  current_header_size_ = sizeof(header); // 32-bit, not 64-bit
-  current_header_offset_ = offset;
-  offset += current_header_size_;
-  bool result = WalkHeaderCore(offset, header.ncmds, swap);
-  current_header_ = NULL;
-  current_header_size_ = 0;
-  current_header_offset_ = 0;
-  return result;
-}
-
-bool MachoWalker::WalkHeader64AtOffset(off_t offset) {
-  struct mach_header_64 header;
-  if (!ReadBytes(&header, sizeof(header), offset))
-    return false;
-
-  bool swap = (header.magic == MH_CIGAM_64);
-  if (swap)
-    breakpad_swap_mach_header_64(&header, NXHostByteOrder());
-
-  current_header_ = &header;
-  current_header_size_ = sizeof(header);
-  current_header_offset_ = offset;
-  offset += current_header_size_;
-  bool result = WalkHeaderCore(offset, header.ncmds, swap);
-  current_header_ = NULL;
-  current_header_size_ = 0;
-  current_header_offset_ = 0;
-  return result;
-}
-
-bool MachoWalker::WalkHeaderCore(off_t offset, uint32_t number_of_commands,
-                                 bool swap) {
-  for (uint32_t i = 0; i < number_of_commands; ++i) {
-    struct load_command cmd;
-    if (!ReadBytes(&cmd, sizeof(cmd), offset))
-      return false;
-
-    if (swap)
-      swap_load_command(&cmd, NXHostByteOrder());
-
-    // Call the user callback
-    if (callback_ && !callback_(this, &cmd, offset, swap, callback_context_))
-      break;
-
-    offset += cmd.cmdsize;
-  }
-
-  return true;
-}
-
-}  // namespace MacFileUtilities