Move tools/llvm/driver to pnacl/driver.

tools/llvm/driver/artools.py

-#!/usr/bin/python
-# Copyright (c) 2011 The Native Client Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-#
-# IMPORTANT NOTE: If you make local mods to this file, you must run:
-#   %  tools/llvm/utman.sh driver
-# in order for them to take effect in the scons build.  This command
-# updates the copy in the toolchain/ tree.
-#
-
-# Tool for reading archive (.a) files
-
-# TODO(pdox): Refactor driver_tools so that there is no circular dependency.
-import driver_tools
-
-AR_MAGIC = '!<arch>\n'
-
-def IsArchive(filename):
-  fp = driver_tools.DriverOpen(filename, "rb")
-  magic = fp.read(8)
-  fp.close()
-  return magic == AR_MAGIC
-
-def GetArchiveType(filename):
-  fp = driver_tools.DriverOpen(filename, "rb")
-
-  # Read the archive magic header
-  magic = fp.read(8)
-  assert(magic == AR_MAGIC)
-
-  # Find a regular file or symbol table
-  found_type = ''
-  while not found_type:
-    member = MemberHeader(fp)
-    if member.error == 'EOF':
-      break
-    elif member.error:
-      driver_tools.Log.Fatal("%s: %s", filename, member.error)
-
-    data = fp.read(member.size)
-    if member.is_regular_file:
-      if data.startswith('BC'):
-        found_type = 'archive-bc'
-      else:
-        elf_header = driver_tools.DecodeELFHeader(data, filename)
-        if elf_header:
-          found_type = 'archive-%s' % elf_header.arch
-
-  if not found_type:
-    driver_tools.Log.Fatal("%s: Unable to determine archive type", filename)
-
-  fp.close()
-  return found_type
-
-
-# For information about the .ar file format, see:
-#   http://en.wikipedia.org/wiki/Ar_(Unix)
-class MemberHeader(object):
-  def __init__(self, fp):
-    self.error = ''
-    header = fp.read(60)
-    if len(header) == 0:
-      self.error = "EOF"
-      return
-
-    if len(header) != 60:
-      self.error = 'Short count reading archive member header';
-      return
-
-    self.name = header[0:16]
-    self.size = header[48:48 + 10]
-    self.fmag = header[58:60]
-
-    if self.fmag != '`\n':
-      self.error = 'Invalid archive member header magic string'
-      return
-
-    self.size = int(self.size)
-
-    self.is_svr4_symtab = (self.name == '/               ')
-    self.is_llvm_symtab = (self.name == '#_LLVM_SYM_TAB_#')
-    self.is_bsd4_symtab = (self.name == '__.SYMDEF SORTED')
-    self.is_strtab      = (self.name == '//              ')
-    self.is_regular_file = not (self.is_svr4_symtab or
-                                self.is_llvm_symtab or
-                                self.is_bsd4_symtab or
-                                self.is_strtab)
-
-    # BSD style long names (not supported)
-    if self.name.startswith('#1/'):
-      self.error = "BSD-style long file names not supported"
-      return
-
-    # If it's a GNU long filename, note this, but don't actually
-    # look it up. (we don't need it)
-    self.is_long_name = (self.is_regular_file and self.name.startswith('/'))
-
-    if self.is_regular_file and not self.is_long_name:
-      # Filenames end with '/' and are padded with spaces up to 16 bytes
-      self.name = self.name.strip()[:-1]