2461 lines
78 KiB
C++
2461 lines
78 KiB
C++
// Filename: filename.cxx
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// Created by: drose (18Jan99)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#include "filename.h"
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#include "dSearchPath.h"
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#include "executionEnvironment.h"
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#include "vector_string.h"
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#include <stdio.h> // For rename() and tempnam()
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#include <time.h> // for clock() and time()
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#include <sys/stat.h>
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#include <algorithm>
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#ifdef HAVE_UTIME_H
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#include <utime.h>
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// We assume we have these too.
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#include <errno.h>
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#include <fcntl.h>
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#endif
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#ifdef HAVE_GLOB_H
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#include <glob.h>
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#ifndef GLOB_NOMATCH
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#define GLOB_NOMATCH -3
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#endif
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#endif
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#ifdef HAVE_DIRENT_H
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#include <dirent.h>
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#endif
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// It's true that dtoolbase.h includes this already, but we include
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// this again in case we are building this file within ppremake.
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef WIN32
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/* begin Win32-specific code */
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#ifdef WIN32_VC
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#include <direct.h>
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#include <windows.h>
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#endif
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// The MSVC 6.0 Win32 SDK lacks the following definitions, so we define them
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// here for compatibility.
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#ifndef FILE_ATTRIBUTE_DEVICE
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#define FILE_ATTRIBUTE_DEVICE 0x00000040
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#endif
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// We might have been linked with the Cygwin dll. This is ideal if it
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// is available, because it allows Panda to access all the Cygwin
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// mount definitions if they are in use. If the Cygwin dll is not
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// available, we fall back to our own convention for converting
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// pathnames.
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#ifdef HAVE_CYGWIN
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extern "C" void cygwin_conv_to_win32_path(const char *path, char *win32);
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extern "C" void cygwin_conv_to_posix_path(const char *path, char *posix);
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#endif
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// Windows uses the convention \\hostname\path\to\file to represent a
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// pathname to a file on another share. This redefines a pathname to
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// be something more complicated than a sequence of directory names
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// separated by slashes. The Unix convention to represent the same
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// thing is, like everything else, to graft the reference to the
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// remote hostname into the one global filesystem, with something like
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// /hosts/hostname/path/to/file. We observe the Unix convention for
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// internal names used in Panda; this makes operations like
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// Filename::get_dirname() simpler and more internally consistent.
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// This string hard-defines the prefix that we use internally to
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// indicate that the next directory component name should be treated
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// as a hostname. It might be nice to use a ConfigVariable for this,
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// except that we haven't defined ConfigVariable by this point (and
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// indeed we can't, since we need to have a Filename class already
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// created in order to read the first config file). Windows purists
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// might be tempted to define this to a double slash so that internal
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// Panda filenames more closely resemble their Windows counterparts.
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// That might actually work, but it will cause problems with
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// Filename::standardize().
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static const string hosts_prefix = "/hosts/";
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static string
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front_to_back_slash(const string &str) {
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string result = str;
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string::iterator si;
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for (si = result.begin(); si != result.end(); ++si) {
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if ((*si) == '/') {
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(*si) = '\\';
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}
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}
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return result;
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}
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static string
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back_to_front_slash(const string &str) {
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string result = str;
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string::iterator si;
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for (si = result.begin(); si != result.end(); ++si) {
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if ((*si) == '\\') {
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(*si) = '/';
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}
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}
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return result;
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}
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static const string &
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get_panda_root() {
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static string panda_root;
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static bool got_panda_root = false;
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if (!got_panda_root) {
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const char *envvar = getenv("PANDA_ROOT");
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if (envvar != (const char *)NULL) {
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panda_root = front_to_back_slash(envvar);
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}
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// Ensure the string ends in a backslash. If PANDA_ROOT is empty
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// or undefined, this function must return a single backslash--not
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// an empty string--since this prefix is used to replace a leading
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// slash in Filename::to_os_specific().
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if (panda_root.empty() || panda_root[panda_root.length() - 1] != '\\') {
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panda_root += '\\';
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}
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got_panda_root = true;
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}
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return panda_root;
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}
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static string
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convert_pathname(const string &unix_style_pathname) {
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if (unix_style_pathname.empty()) {
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return string();
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}
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// To convert from a Unix-style pathname to a Windows-style
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// pathname, we need to change all forward slashes to backslashes.
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// We might need to add a prefix as well, since Windows pathnames
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// typically begin with a drive letter.
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// By convention, if the top directory name consists of just one
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// letter, we treat that as a drive letter and map the rest of the
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// filename accordingly. On the other hand, if the top directory
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// name consists of more than one letter, we assume this is a file
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// within some predefined tree whose root is given by the
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// environment variable "PANDA_ROOT", or if that is not defined,
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// "CYGWIN_ROOT" (for backward compatibility).
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string windows_pathname;
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if (unix_style_pathname[0] != '/') {
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// It doesn't even start from the root, so we don't have to do
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// anything fancy--relative pathnames are the same in Windows as
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// in Unix, except for the direction of the slashes.
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windows_pathname = front_to_back_slash(unix_style_pathname);
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} else if (unix_style_pathname.length() >= 2 &&
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isalpha(unix_style_pathname[1]) &&
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(unix_style_pathname.length() == 2 || unix_style_pathname[2] == '/')) {
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// This pathname begins with a slash and a single letter. That
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// must be the drive letter.
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string remainder = unix_style_pathname.substr(2);
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if (remainder.empty()) {
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// There's a difference between "C:" and "C:/".
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remainder = "/";
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}
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remainder = front_to_back_slash(remainder);
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// We have to cast the result of toupper() to (char) to help some
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// compilers (e.g. Cygwin's gcc 2.95.3) happy; so that they do not
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// confuse this string constructor with one that takes two
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// iterators.
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windows_pathname =
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string(1, (char)toupper(unix_style_pathname[1])) + ":" + remainder;
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} else if (unix_style_pathname.length() > hosts_prefix.length() &&
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unix_style_pathname.substr(0, hosts_prefix.length()) == hosts_prefix) {
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// A filename like /hosts/fooby gets turned into \\fooby.
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windows_pathname = "\\\\" + front_to_back_slash(unix_style_pathname.substr(hosts_prefix.length()));
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} else {
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// It starts with a slash, but the first part is not a single
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// letter.
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#ifdef HAVE_CYGWIN
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// Use Cygwin to convert it if possible.
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char result[4096] = "";
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cygwin_conv_to_win32_path(unix_style_pathname.c_str(), result);
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windows_pathname = result;
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#else // HAVE_CYGWIN
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// Without Cygwin, just prefix $PANDA_ROOT.
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windows_pathname = get_panda_root();
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windows_pathname += front_to_back_slash(unix_style_pathname.substr(1));
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#endif // HAVE_CYGWIN
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}
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return windows_pathname;
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}
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static string
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convert_dso_pathname(const string &unix_style_pathname) {
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// If the extension is .so, change it to .dll.
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size_t dot = unix_style_pathname.rfind('.');
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if (dot == string::npos ||
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unix_style_pathname.find('/', dot) != string::npos) {
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// No filename extension.
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return convert_pathname(unix_style_pathname);
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}
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if (unix_style_pathname.substr(dot) != ".so") {
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// Some other extension.
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return convert_pathname(unix_style_pathname);
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}
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string dll_basename = unix_style_pathname.substr(0, dot);
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#ifdef _DEBUG
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// If we're building a debug version, all the dso files we link in
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// must be named file_d.dll. This does prohibit us from linking in
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// external dso files, generated outside of the Panda build system,
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// that don't follow this _d convention. Maybe we need a separate
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// convert_system_dso_pathname() function.
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// We can't simply check to see if the file exists, because this
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// might not be a full path to the dso filename--it might be
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// somewhere on the LD_LIBRARY_PATH, or on PATH, or any of a number
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// of nutty places.
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return convert_pathname(dll_basename + "_d.dll");
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#else
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return convert_pathname(dll_basename + ".dll");
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#endif
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}
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static string
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convert_executable_pathname(const string &unix_style_pathname) {
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// If the extension is not .exe, append .exe.
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size_t dot = unix_style_pathname.rfind('.');
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if (dot == string::npos ||
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unix_style_pathname.find('/', dot) != string::npos) {
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// No filename extension.
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return convert_pathname(unix_style_pathname + ".exe");
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}
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if (unix_style_pathname.substr(dot) != ".exe") {
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// Some other extension.
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return convert_pathname(unix_style_pathname + ".exe");
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}
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return convert_pathname(unix_style_pathname);
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}
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#endif //WIN32
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////////////////////////////////////////////////////////////////////
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// Function: Filename::Constructor
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// Access: Published
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// Description: This constructor composes the filename out of a
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// directory part and a basename part. It will insert
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// an intervening '/' if necessary.
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////////////////////////////////////////////////////////////////////
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Filename::
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Filename(const Filename &dirname, const Filename &basename) {
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if (dirname.empty()) {
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(*this) = basename;
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} else {
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_flags = basename._flags;
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string dirpath = dirname.get_fullpath();
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if (dirpath[dirpath.length() - 1] == '/') {
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(*this) = dirpath + basename.get_fullpath();
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} else {
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(*this) = dirpath + "/" + basename.get_fullpath();
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}
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: Filename::from_os_specific
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// Access: Published, Static
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// Description: This named constructor returns a Panda-style filename
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// (that is, using forward slashes, and no drive letter)
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// based on the supplied filename string that describes
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// a filename in the local system conventions (for
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// instance, on Windows, it may use backslashes or begin
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// with a drive letter and a colon).
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//
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// Use this function to create a Filename from an
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// externally-given filename string. Use
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// to_os_specific() again later to reconvert it back to
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// the local operating system's conventions.
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//
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// This function will do the right thing even if the
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// filename is partially local conventions and partially
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// Panda conventions; e.g. some backslashes and some
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// forward slashes.
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////////////////////////////////////////////////////////////////////
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Filename Filename::
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from_os_specific(const string &os_specific, Filename::Type type) {
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#ifdef WIN32
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string result = back_to_front_slash(os_specific);
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const string &panda_root = get_panda_root();
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// If the initial prefix is the same as panda_root, remove it.
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if (!panda_root.empty() && panda_root != string("\\") &&
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panda_root.length() < result.length()) {
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bool matches = true;
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size_t p;
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for (p = 0; p < panda_root.length() && matches; ++p) {
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char c = tolower(panda_root[p]);
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if (c == '\\') {
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c = '/';
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}
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matches = (c == tolower(result[p]));
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}
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if (matches) {
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// The initial prefix matches! Replace the initial bit with a
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// leading slash.
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result = result.substr(panda_root.length());
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assert(!result.empty());
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if (result[0] != '/') {
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result = '/' + result;
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}
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Filename filename(result);
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filename.set_type(type);
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return filename;
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}
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}
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// All right, the initial prefix was not under panda_root. But
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// maybe it begins with a drive letter.
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if (result.size() >= 3 && isalpha(result[0]) &&
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result[1] == ':' && result[2] == '/') {
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result[1] = tolower(result[0]);
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result[0] = '/';
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// If there's *just* a slash following the drive letter, go ahead
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// and trim it.
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if (result.size() == 3) {
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result = result.substr(0, 2);
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}
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} else if (result.substr(0, 2) == "//") {
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// If the initial prefix is a double slash, convert it to /hosts/.
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result = hosts_prefix + result.substr(2);
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}
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Filename filename(result);
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filename.set_type(type);
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return filename;
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#else // WIN32
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// Generic Unix-style filenames--no conversion necessary.
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Filename filename(os_specific);
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filename.set_type(type);
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return filename;
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#endif // WIN32
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}
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////////////////////////////////////////////////////////////////////
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// Function: Filename::expand_from
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// Access: Published, Static
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// Description: Returns the same thing as from_os_specific(), but
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// embedded environment variable references
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// (e.g. "$DMODELS/foo.txt") are expanded out.
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////////////////////////////////////////////////////////////////////
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Filename Filename::
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expand_from(const string &os_specific, Filename::Type type) {
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return from_os_specific(ExecutionEnvironment::expand_string(os_specific),
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type);
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}
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////////////////////////////////////////////////////////////////////
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// Function: Filename::temporary
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// Access: Published, Static
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// Description: Generates a temporary filename within the indicated
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// directory, using the indicated prefix. If the
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// directory is empty, a system-defined directory is
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// chosen instead.
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//
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// The generated filename did not exist when the
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// Filename checked, but since it does not specifically
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// create the file, it is possible that another process
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// could simultaneously create a file by the same name.
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////////////////////////////////////////////////////////////////////
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Filename Filename::
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temporary(const string &dirname, const string &prefix, const string &suffix,
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Type type) {
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if (dirname.empty()) {
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// If we are not given a dirname, use the system tempnam()
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// function to create a system-defined temporary filename.
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char *name = tempnam(NULL, prefix.c_str());
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Filename result(name);
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free(name);
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result.set_type(type);
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return result;
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}
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// If we *are* given a dirname, then use our own algorithm to make
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// up a filename within that dirname. We do that because the system
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// tempnam() (for instance, under Windows) may ignore the dirname.
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Filename result;
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do {
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// We take the time of day and multiply it by the process time.
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// This will give us a very large number, of which we take the
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// bottom 24 bits and generate a 6-character hex code.
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int hash = (clock() * time(NULL)) & 0xffffff;
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char hex_code[10];
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sprintf(hex_code, "%06x", hash);
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result = Filename(dirname, Filename(prefix + hex_code + suffix));
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result.set_type(type);
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} while (result.exists());
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return result;
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}
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////////////////////////////////////////////////////////////////////
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// Function: Filename::set_fullpath
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// Access: Published
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// Description: Replaces the entire filename: directory, basename,
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// extension. This can also be achieved with the
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// assignment operator.
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////////////////////////////////////////////////////////////////////
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void Filename::
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set_fullpath(const string &s) {
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(*this) = s;
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}
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////////////////////////////////////////////////////////////////////
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// Function: Filename::set_dirname
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// Access: Published
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// Description: Replaces the directory part of the filename. This is
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// everything in the filename up to, but not including
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// the rightmost slash.
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////////////////////////////////////////////////////////////////////
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void Filename::
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set_dirname(const string &s) {
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if (s.empty()) {
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// Remove the directory prefix altogether.
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_filename.replace(0, _basename_start, "");
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int length_change = - ((int)_basename_start);
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_dirname_end = 0;
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_basename_start += length_change;
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_basename_end += length_change;
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_extension_start += length_change;
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} else {
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// Replace the existing directory prefix, or insert a new one.
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// We build the string ss to include the terminal slash.
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string ss;
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if (s[s.length()-1] == '/') {
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ss = s;
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} else {
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ss = s+'/';
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}
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int length_change = ss.length() - _basename_start;
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_filename.replace(0, _basename_start, ss);
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_dirname_end = ss.length() - 1;
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// An exception: if the dirname string was the single slash, the
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// dirname includes that slash.
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if (ss.length() == 1) {
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_dirname_end = 1;
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}
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_basename_start += length_change;
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if (_basename_end != string::npos) {
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_basename_end += length_change;
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_extension_start += length_change;
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}
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}
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locate_hash();
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}
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|
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////////////////////////////////////////////////////////////////////
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// Function: Filename::set_basename
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// Access: Published
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// Description: Replaces the basename part of the filename. This is
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// everything in the filename after the rightmost slash,
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// including any extensions.
|
|
////////////////////////////////////////////////////////////////////
|
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void Filename::
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set_basename(const string &s) {
|
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_filename.replace(_basename_start, string::npos, s);
|
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locate_extension();
|
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locate_hash();
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}
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////////////////////////////////////////////////////////////////////
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// Function: Filename::set_fullpath_wo_extension
|
|
// Access: Published
|
|
// Description: Replaces the full filename--directory and basename
|
|
// parts--except for the extension.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
set_fullpath_wo_extension(const string &s) {
|
|
int length_change = s.length() - _basename_end;
|
|
|
|
_filename.replace(0, _basename_end, s);
|
|
|
|
if (_basename_end != string::npos) {
|
|
_basename_end += length_change;
|
|
_extension_start += length_change;
|
|
}
|
|
locate_hash();
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::set_basename_wo_extension
|
|
// Access: Published
|
|
// Description: Replaces the basename part of the filename, without
|
|
// the file extension.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
set_basename_wo_extension(const string &s) {
|
|
int length_change = s.length() - (_basename_end - _basename_start);
|
|
|
|
if (_basename_end == string::npos) {
|
|
_filename.replace(_basename_start, string::npos, s);
|
|
|
|
} else {
|
|
_filename.replace(_basename_start, _basename_end - _basename_start, s);
|
|
|
|
_basename_end += length_change;
|
|
_extension_start += length_change;
|
|
}
|
|
locate_hash();
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::set_extension
|
|
// Access: Published
|
|
// Description: Replaces the file extension. This is everything after
|
|
// the rightmost dot, if there is one, or the empty
|
|
// string if there is not.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
set_extension(const string &s) {
|
|
if (s.empty()) {
|
|
// Remove the extension altogether.
|
|
if (_basename_end != string::npos) {
|
|
_filename.replace(_basename_end, string::npos, "");
|
|
_basename_end = string::npos;
|
|
_extension_start = string::npos;
|
|
}
|
|
|
|
} else if (_basename_end == string::npos) {
|
|
// Insert an extension where there was none before.
|
|
_basename_end = _filename.length();
|
|
_extension_start = _filename.length() + 1;
|
|
_filename += '.' + s;
|
|
|
|
} else {
|
|
// Replace an existing extension.
|
|
_filename.replace(_extension_start, string::npos, s);
|
|
}
|
|
locate_hash();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::get_filename_index
|
|
// Access: Published
|
|
// Description: If the pattern flag is set for this Filename and the
|
|
// filename string actually includes a sequence of hash
|
|
// marks, then this returns a new Filename with the
|
|
// sequence of hash marks replaced by the indicated
|
|
// index number.
|
|
//
|
|
// If the pattern flag is not set for this Filename or
|
|
// it does not contain a sequence of hash marks, this
|
|
// quietly returns the original filename.
|
|
////////////////////////////////////////////////////////////////////
|
|
Filename Filename::
|
|
get_filename_index(int index) const {
|
|
Filename file(*this);
|
|
|
|
if (_hash_end != _hash_start) {
|
|
ostringstream strm;
|
|
strm << _filename.substr(0, _hash_start)
|
|
<< setw(_hash_end - _hash_start) << setfill('0') << index
|
|
<< _filename.substr(_hash_end);
|
|
file.set_fullpath(strm.str());
|
|
}
|
|
file.set_pattern(false);
|
|
|
|
return file;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::set_hash_to_end
|
|
// Access: Published
|
|
// Description: Replaces the part of the filename from the beginning
|
|
// of the hash sequence to the end of the filename.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
set_hash_to_end(const string &s) {
|
|
_filename.replace(_hash_start, string::npos, s);
|
|
|
|
locate_basename();
|
|
locate_extension();
|
|
locate_hash();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::extract_components
|
|
// Access: Published
|
|
// Description: Extracts out the individual directory components of
|
|
// the path into a series of strings. get_basename()
|
|
// will be the last component stored in the vector.
|
|
// Note that no distinction is made by this method
|
|
// between a leading slash and no leading slash, but you
|
|
// can call is_local() to differentiate the two cases.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
extract_components(vector_string &components) const {
|
|
components.clear();
|
|
|
|
size_t p = 0;
|
|
if (!_filename.empty() && _filename[0] == '/') {
|
|
// Skip the leading slash.
|
|
p = 1;
|
|
}
|
|
while (p < _filename.length()) {
|
|
size_t q = _filename.find('/', p);
|
|
if (q == string::npos) {
|
|
components.push_back(_filename.substr(p));
|
|
return;
|
|
}
|
|
components.push_back(_filename.substr(p, q - p));
|
|
p = q + 1;
|
|
}
|
|
|
|
// A trailing slash means we have an empty get_basename().
|
|
components.push_back(string());
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::standardize
|
|
// Access: Published
|
|
// Description: Converts the filename to standard form by replacing
|
|
// consecutive slashes with a single slash, removing a
|
|
// trailing slash if present, and backing up over ../
|
|
// sequences within the filename where possible.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
standardize() {
|
|
assert(!_filename.empty());
|
|
if (_filename == ".") {
|
|
// Don't change a single dot; this refers to the current directory.
|
|
return;
|
|
}
|
|
|
|
vector_string components;
|
|
|
|
// Pull off the components of the filename one at a time.
|
|
bool global = (_filename[0] == '/');
|
|
|
|
size_t p = 0;
|
|
while (p < _filename.length() && _filename[p] == '/') {
|
|
p++;
|
|
}
|
|
while (p < _filename.length()) {
|
|
size_t slash = _filename.find('/', p);
|
|
string component = _filename.substr(p, slash - p);
|
|
if (component == ".") {
|
|
// Ignore /./.
|
|
} else if (component == ".." && !components.empty() &&
|
|
!(components.back() == "..")) {
|
|
// Back up.
|
|
components.pop_back();
|
|
} else {
|
|
components.push_back(component);
|
|
}
|
|
|
|
p = slash;
|
|
while (p < _filename.length() && _filename[p] == '/') {
|
|
p++;
|
|
}
|
|
}
|
|
|
|
// Now reassemble the filename.
|
|
string result;
|
|
if (global) {
|
|
result = "/";
|
|
}
|
|
if (!components.empty()) {
|
|
result += components[0];
|
|
for (int i = 1; i < (int)components.size(); i++) {
|
|
result += "/" + components[i];
|
|
}
|
|
}
|
|
|
|
(*this) = result;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::make_absolute
|
|
// Access: Published
|
|
// Description: Converts the filename to a fully-qualified pathname
|
|
// from the root (if it is a relative pathname), and
|
|
// then standardizes it (see standardize()).
|
|
//
|
|
// This is sometimes a little problematic, since it may
|
|
// convert the file to its 'true' absolute pathname,
|
|
// which could be an ugly NFS-named file, irrespective
|
|
// of symbolic links
|
|
// (e.g. /.automount/dimbo/root/usr2/fit/people/drose
|
|
// instead of /fit/people/drose); besides being ugly,
|
|
// filenames like this may not be consistent across
|
|
// multiple different platforms.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
make_absolute() {
|
|
if (is_local()) {
|
|
make_absolute(ExecutionEnvironment::get_cwd());
|
|
} else {
|
|
standardize();
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::make_absolute
|
|
// Access: Published
|
|
// Description: Converts the filename to a fully-qualified filename
|
|
// from the root (if it is a relative filename), and
|
|
// then standardizes it (see standardize()). This
|
|
// flavor accepts a specific starting directory that the
|
|
// filename is known to be relative to.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
make_absolute(const Filename &start_directory) {
|
|
if (is_local()) {
|
|
Filename new_filename(start_directory, _filename);
|
|
new_filename._flags = _flags;
|
|
(*this) = new_filename;
|
|
}
|
|
|
|
standardize();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::make_canonical
|
|
// Access: Published
|
|
// Description: Converts this filename to a canonical name by
|
|
// replacing the directory part with the fully-qualified
|
|
// directory part. This is done by changing to that
|
|
// directory and calling getcwd().
|
|
//
|
|
// This has the effect of (a) converting relative paths
|
|
// to absolute paths (but see make_absolute() if this is
|
|
// the only effect you want), and (b) always resolving a
|
|
// given directory name to the same string, even if
|
|
// different symbolic links are traversed, and (c)
|
|
// changing nice symbolic-link paths like
|
|
// /fit/people/drose to ugly NFS automounter names like
|
|
// /hosts/dimbo/usr2/fit/people/drose. This can be
|
|
// troubling, but sometimes this is exactly what you
|
|
// want, particularly if you're about to call
|
|
// make_relative_to() between two filenames.
|
|
//
|
|
// The return value is true if successful, or false on
|
|
// failure (usually because the directory name does not
|
|
// exist or cannot be chdir'ed into).
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
make_canonical() {
|
|
if (empty()) {
|
|
// An empty filename is a special case. This doesn't name
|
|
// anything.
|
|
return false;
|
|
}
|
|
|
|
if (get_fullpath() == "/") {
|
|
// The root directory is a special case.
|
|
return true;
|
|
}
|
|
|
|
Filename cwd = ExecutionEnvironment::get_cwd();
|
|
return r_make_canonical(cwd);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::make_true_case
|
|
// Access: Published
|
|
// Description: On a case-insensitive operating system
|
|
// (e.g. Windows), this method looks up the file in the
|
|
// file system and resets the Filename to represent the
|
|
// actual case of the file as it exists on the disk.
|
|
// The return value is true if the file exists and the
|
|
// conversion can be made, or false if there is some
|
|
// error.
|
|
//
|
|
// On a case-sensitive operating system, this method
|
|
// does nothing and always returns true.
|
|
//
|
|
// An empty filename is considered to exist in this
|
|
// case.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
make_true_case() {
|
|
assert(!get_pattern());
|
|
|
|
if (empty()) {
|
|
return true;
|
|
}
|
|
|
|
#ifdef WIN32
|
|
string os_specific = to_os_specific();
|
|
|
|
// First, we have to convert it to its short name, then back to its
|
|
// long name--that seems to be the trick to force Windows to throw
|
|
// away the case we give it and get the actual file case.
|
|
|
|
char short_name[MAX_PATH + 1];
|
|
DWORD l = GetShortPathName(os_specific.c_str(), short_name, MAX_PATH + 1);
|
|
if (l == 0) {
|
|
// Couldn't query the path name for some reason. Probably the
|
|
// file didn't exist.
|
|
return false;
|
|
}
|
|
// According to the Windows docs, l will return a value greater than
|
|
// the specified length if the short_name length wasn't enough--but also
|
|
// according to the Windows docs, MAX_PATH will always be enough.
|
|
assert(l < MAX_PATH + 1);
|
|
|
|
char long_name[MAX_PATH + 1];
|
|
l = GetLongPathName(short_name, long_name, MAX_PATH + 1);
|
|
if (l == 0) {
|
|
// Couldn't query the path name for some reason. Probably the
|
|
// file didn't exist.
|
|
return false;
|
|
}
|
|
assert(l < MAX_PATH + 1);
|
|
|
|
Filename true_case = Filename::from_os_specific(long_name);
|
|
|
|
// Now sanity-check the true-case filename. If it's not the same as
|
|
// the source file, except for case, reject it.
|
|
string orig_filename = get_fullpath();
|
|
string new_filename = true_case.get_fullpath();
|
|
bool match = (orig_filename.length() == new_filename.length());
|
|
for (size_t i = 0; i < orig_filename.length() && match; ++i) {
|
|
match = (tolower(orig_filename[i]) == tolower(new_filename[i]));
|
|
}
|
|
if (!match) {
|
|
// Something went wrong. Keep the original filename, assume it
|
|
// was the correct case after all. We return true because the
|
|
// filename is good.
|
|
return true;
|
|
}
|
|
|
|
(*this) = true_case;
|
|
return true;
|
|
|
|
#else // WIN32
|
|
return true;
|
|
#endif // WIN32
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::to_os_specific
|
|
// Access: Published
|
|
// Description: Converts the filename from our generic Unix-like
|
|
// convention (forward slashes starting with the root at
|
|
// '/') to the corresponding filename in the local
|
|
// operating system (slashes in the appropriate
|
|
// direction, starting with the root at C:\, for
|
|
// instance). Returns the string representing the
|
|
// converted filename, but does not change the Filename
|
|
// itself.
|
|
//
|
|
// See also from_os_specific().
|
|
////////////////////////////////////////////////////////////////////
|
|
string Filename::
|
|
to_os_specific() const {
|
|
assert(!get_pattern());
|
|
|
|
if (empty()) {
|
|
return string();
|
|
}
|
|
Filename standard(*this);
|
|
standard.standardize();
|
|
|
|
#ifdef IS_OSX
|
|
if (get_type() == T_dso) {
|
|
std::string workname = standard.get_fullpath();
|
|
size_t dot = workname.rfind('.');
|
|
if (dot != string::npos) {
|
|
if (workname.substr(dot) == ".so") {
|
|
string dyLibBase = workname.substr(0, dot)+".dylib";
|
|
return dyLibBase;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef WIN32
|
|
switch (get_type()) {
|
|
case T_dso:
|
|
return convert_dso_pathname(standard.get_fullpath());
|
|
case T_executable:
|
|
return convert_executable_pathname(standard.get_fullpath());
|
|
default:
|
|
return convert_pathname(standard.get_fullpath());
|
|
}
|
|
#else // WIN32
|
|
return standard;
|
|
#endif // WIN32
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::to_os_generic
|
|
// Access: Published
|
|
// Description: This is similar to to_os_specific(), but it is
|
|
// designed to generate a filename that can be
|
|
// understood on as many platforms as possible. Since
|
|
// Windows can usually understand a
|
|
// forward-slash-delimited filename, this means it does
|
|
// the same thing as to_os_specific(), but it uses
|
|
// forward slashes instead of backslashes.
|
|
//
|
|
// This method has a pretty limited use; it should
|
|
// generally be used for writing file references to a
|
|
// file that might be read on any operating system.
|
|
////////////////////////////////////////////////////////////////////
|
|
string Filename::
|
|
to_os_generic() const {
|
|
assert(!get_pattern());
|
|
|
|
#ifdef WIN32
|
|
return back_to_front_slash(to_os_specific());
|
|
#else // WIN32
|
|
return to_os_specific();
|
|
#endif // WIN32
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::to_os_short_name
|
|
// Access: Published
|
|
// Description: This works like to_os_generic(), but it returns the
|
|
// "short name" version of the filename, if it exists,
|
|
// or the original filename otherwise.
|
|
//
|
|
// On Windows platforms, this returns the 8.3 filename
|
|
// version of the given filename, if the file exists,
|
|
// and the same thing as to_os_specific() otherwise. On
|
|
// non-Windows platforms, this always returns the same
|
|
// thing as to_os_specific().
|
|
////////////////////////////////////////////////////////////////////
|
|
string Filename::
|
|
to_os_short_name() const {
|
|
assert(!get_pattern());
|
|
|
|
#ifdef WIN32
|
|
string os_specific = to_os_specific();
|
|
|
|
char short_name[MAX_PATH + 1];
|
|
DWORD l = GetShortPathName(os_specific.c_str(), short_name, MAX_PATH + 1);
|
|
if (l == 0) {
|
|
// Couldn't query the path name for some reason. Probably the
|
|
// file didn't exist.
|
|
return os_specific;
|
|
}
|
|
// According to the Windows docs, l will return a value greater than
|
|
// the specified length if the short_name length wasn't enough--but also
|
|
// according to the Windows docs, MAX_PATH will always be enough.
|
|
assert(l < MAX_PATH + 1);
|
|
|
|
return string(short_name);
|
|
|
|
#else // WIN32
|
|
return to_os_specific();
|
|
#endif // WIN32
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::to_os_long_name
|
|
// Access: Published
|
|
// Description: This is the opposite of to_os_short_name(): it
|
|
// returns the "long name" of the filename, if the
|
|
// filename exists. On non-Windows platforms, this
|
|
// returns the same thing as to_os_specific().
|
|
////////////////////////////////////////////////////////////////////
|
|
string Filename::
|
|
to_os_long_name() const {
|
|
assert(!get_pattern());
|
|
|
|
#ifdef WIN32
|
|
string os_specific = to_os_specific();
|
|
|
|
char long_name[MAX_PATH + 1];
|
|
DWORD l = GetLongPathName(os_specific.c_str(), long_name, MAX_PATH + 1);
|
|
if (l == 0) {
|
|
// Couldn't query the path name for some reason. Probably the
|
|
// file didn't exist.
|
|
return os_specific;
|
|
}
|
|
assert(l < MAX_PATH + 1);
|
|
|
|
return string(long_name);
|
|
|
|
#else // WIN32
|
|
return to_os_specific();
|
|
#endif // WIN32
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::exists
|
|
// Access: Published
|
|
// Description: Returns true if the filename exists on the disk,
|
|
// false otherwise. If the type is indicated to be
|
|
// executable, this also tests that the file has execute
|
|
// permission.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
exists() const {
|
|
string os_specific = get_filename_index(0).to_os_specific();
|
|
|
|
#ifdef WIN32_VC
|
|
bool exists = false;
|
|
|
|
DWORD results = GetFileAttributes(os_specific.c_str());
|
|
if (results != -1) {
|
|
exists = true;
|
|
}
|
|
|
|
#else // WIN32_VC
|
|
struct stat this_buf;
|
|
bool exists = false;
|
|
|
|
if (stat(os_specific.c_str(), &this_buf) == 0) {
|
|
exists = true;
|
|
}
|
|
#endif
|
|
|
|
return exists;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::is_regular_file
|
|
// Access: Published
|
|
// Description: Returns true if the filename exists and is the
|
|
// name of a regular file (i.e. not a directory or
|
|
// device), false otherwise.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
is_regular_file() const {
|
|
string os_specific = get_filename_index(0).to_os_specific();
|
|
|
|
#ifdef WIN32_VC
|
|
bool isreg = false;
|
|
|
|
DWORD results = GetFileAttributes(os_specific.c_str());
|
|
if (results != -1) {
|
|
isreg = ((results & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE)) == 0);
|
|
}
|
|
|
|
#else // WIN32_VC
|
|
struct stat this_buf;
|
|
bool isreg = false;
|
|
|
|
if (stat(os_specific.c_str(), &this_buf) == 0) {
|
|
isreg = S_ISREG(this_buf.st_mode);
|
|
}
|
|
#endif
|
|
|
|
return isreg;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::is_directory
|
|
// Access: Published
|
|
// Description: Returns true if the filename exists and is a
|
|
// directory name, false otherwise.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
is_directory() const {
|
|
string os_specific = get_filename_index(0).to_os_specific();
|
|
|
|
#ifdef WIN32_VC
|
|
bool isdir = false;
|
|
|
|
DWORD results = GetFileAttributes(os_specific.c_str());
|
|
if (results != -1) {
|
|
isdir = (results & FILE_ATTRIBUTE_DIRECTORY) != 0;
|
|
}
|
|
#else // WIN32_VC
|
|
struct stat this_buf;
|
|
bool isdir = false;
|
|
|
|
if (stat(os_specific.c_str(), &this_buf) == 0) {
|
|
isdir = S_ISDIR(this_buf.st_mode);
|
|
}
|
|
#endif
|
|
|
|
return isdir;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::is_executable
|
|
// Access: Published
|
|
// Description: Returns true if the filename exists and is
|
|
// executable
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
is_executable() const {
|
|
#ifdef WIN32_VC
|
|
// no access() in windows, but to our advantage executables can only
|
|
// end in .exe or .com
|
|
string extension = get_extension();
|
|
if (extension == "exe" || extension == "com") {
|
|
return exists();
|
|
}
|
|
|
|
#else /* WIN32_VC */
|
|
string os_specific = get_filename_index(0).to_os_specific();
|
|
if (access(os_specific.c_str(), X_OK) == 0) {
|
|
return true;
|
|
}
|
|
#endif /* WIN32_VC */
|
|
|
|
return false;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::compare_timestamps
|
|
// Access: Published
|
|
// Description: Returns a number less than zero if the file named by
|
|
// this object is older than the given file, zero if
|
|
// they have the same timestamp, or greater than zero if
|
|
// this one is newer.
|
|
//
|
|
// If this_missing_is_old is true, it indicates that a
|
|
// missing file will be treated as if it were older than
|
|
// any other file; otherwise, a missing file will be
|
|
// treated as if it were newer than any other file.
|
|
// Similarly for other_missing_is_old.
|
|
////////////////////////////////////////////////////////////////////
|
|
int Filename::
|
|
compare_timestamps(const Filename &other,
|
|
bool this_missing_is_old,
|
|
bool other_missing_is_old) const {
|
|
string os_specific = get_filename_index(0).to_os_specific();
|
|
string other_os_specific = other.get_filename_index(0).to_os_specific();
|
|
|
|
#ifdef WIN32_VC
|
|
struct _stat this_buf;
|
|
bool this_exists = false;
|
|
|
|
if (_stat(os_specific.c_str(), &this_buf) == 0) {
|
|
this_exists = true;
|
|
}
|
|
|
|
struct _stat other_buf;
|
|
bool other_exists = false;
|
|
|
|
if (_stat(other_os_specific.c_str(), &other_buf) == 0) {
|
|
other_exists = true;
|
|
}
|
|
#else // WIN32_VC
|
|
struct stat this_buf;
|
|
bool this_exists = false;
|
|
|
|
if (stat(os_specific.c_str(), &this_buf) == 0) {
|
|
this_exists = true;
|
|
}
|
|
|
|
struct stat other_buf;
|
|
bool other_exists = false;
|
|
|
|
if (stat(other_os_specific.c_str(), &other_buf) == 0) {
|
|
other_exists = true;
|
|
}
|
|
#endif
|
|
|
|
if (this_exists && other_exists) {
|
|
// Both files exist, return the honest time comparison.
|
|
return (int)this_buf.st_mtime - (int)other_buf.st_mtime;
|
|
|
|
} else if (!this_exists && !other_exists) {
|
|
// Neither file exists.
|
|
if (this_missing_is_old == other_missing_is_old) {
|
|
// Both files are either "very old" or "very new".
|
|
return 0;
|
|
}
|
|
if (this_missing_is_old) {
|
|
// This file is "very old", the other is "very new".
|
|
return -1;
|
|
} else {
|
|
// This file is "very new", the other is "very old".
|
|
return 1;
|
|
}
|
|
|
|
} else if (!this_exists) {
|
|
// This file doesn't, the other one does.
|
|
return this_missing_is_old ? -1 : 1;
|
|
|
|
}
|
|
// !other_exists
|
|
assert(!other_exists);
|
|
|
|
// This file exists, the other one doesn't.
|
|
return other_missing_is_old ? 1 : -1;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::get_timestamp
|
|
// Access: Published
|
|
// Description: Returns a time_t value that represents the time the
|
|
// file was last modified, to within whatever precision
|
|
// the operating system records this information (on a
|
|
// Windows95 system, for instance, this may only be
|
|
// accurate to within 2 seconds).
|
|
//
|
|
// If the timestamp cannot be determined, either because
|
|
// it is not supported by the operating system or
|
|
// because there is some error (such as file not found),
|
|
// returns 0.
|
|
////////////////////////////////////////////////////////////////////
|
|
time_t Filename::
|
|
get_timestamp() const {
|
|
string os_specific = get_filename_index(0).to_os_specific();
|
|
|
|
#ifdef WIN32_VC
|
|
struct _stat this_buf;
|
|
|
|
if (_stat(os_specific.c_str(), &this_buf) == 0) {
|
|
return this_buf.st_mtime;
|
|
}
|
|
#else // WIN32_VC
|
|
struct stat this_buf;
|
|
|
|
if (stat(os_specific.c_str(), &this_buf) == 0) {
|
|
return this_buf.st_mtime;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::get_access_timestamp
|
|
// Access: Published
|
|
// Description: Returns a time_t value that represents the time the
|
|
// file was last accessed, if this information is
|
|
// available. See also get_timestamp(), which returns
|
|
// the last modification time.
|
|
////////////////////////////////////////////////////////////////////
|
|
time_t Filename::
|
|
get_access_timestamp() const {
|
|
string os_specific = get_filename_index(0).to_os_specific();
|
|
|
|
#ifdef WIN32_VC
|
|
struct _stat this_buf;
|
|
|
|
if (_stat(os_specific.c_str(), &this_buf) == 0) {
|
|
return this_buf.st_atime;
|
|
}
|
|
#else // WIN32_VC
|
|
struct stat this_buf;
|
|
|
|
if (stat(os_specific.c_str(), &this_buf) == 0) {
|
|
return this_buf.st_atime;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::get_file_size
|
|
// Access: Published
|
|
// Description: Returns the size of the file in bytes, or 0 if there
|
|
// is an error.
|
|
////////////////////////////////////////////////////////////////////
|
|
off_t Filename::
|
|
get_file_size() const {
|
|
string os_specific = get_filename_index(0).to_os_specific();
|
|
|
|
#ifdef WIN32_VC
|
|
struct _stat this_buf;
|
|
|
|
if (_stat(os_specific.c_str(), &this_buf) == 0) {
|
|
return this_buf.st_size;
|
|
}
|
|
#else // WIN32_VC
|
|
struct stat this_buf;
|
|
|
|
if (stat(os_specific.c_str(), &this_buf) == 0) {
|
|
return this_buf.st_size;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::resolve_filename
|
|
// Access: Published
|
|
// Description: Searches the given search path for the filename. If
|
|
// it is found, updates the filename to the full
|
|
// pathname found and returns true; otherwise, returns
|
|
// false.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
resolve_filename(const DSearchPath &searchpath,
|
|
const string &default_extension) {
|
|
string found;
|
|
|
|
if (is_local()) {
|
|
found = searchpath.find_file(*this);
|
|
|
|
if (found.empty()) {
|
|
// We didn't find it with the given extension; can we try the
|
|
// default extension?
|
|
if (get_extension().empty() && !default_extension.empty()) {
|
|
Filename try_ext = *this;
|
|
try_ext.set_extension(default_extension);
|
|
found = searchpath.find_file(try_ext);
|
|
}
|
|
}
|
|
} else {
|
|
if (exists()) {
|
|
// The full pathname exists. Return true.
|
|
return true;
|
|
} else {
|
|
// The full pathname doesn't exist with the given extension;
|
|
// does it exist with the default extension?
|
|
if (get_extension().empty() && !default_extension.empty()) {
|
|
Filename try_ext = *this;
|
|
try_ext.set_extension(default_extension);
|
|
if (try_ext.exists()) {
|
|
found = try_ext;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!found.empty()) {
|
|
(*this) = found;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::make_relative_to
|
|
// Access: Published
|
|
// Description: Adjusts this filename, which must be a
|
|
// fully-specified pathname beginning with a slash, to
|
|
// make it a relative filename, relative to the
|
|
// fully-specified directory indicated (which must also
|
|
// begin with, and may or may not end with, a slash--a
|
|
// terminating slash is ignored).
|
|
//
|
|
// This only performs a string comparsion, so it may be
|
|
// wise to call make_canonical() on both filenames
|
|
// before calling make_relative_to().
|
|
//
|
|
// If allow_backups is false, the filename will only be
|
|
// adjusted to be made relative if it is already
|
|
// somewhere within or below the indicated directory.
|
|
// If allow_backups is true, it will be adjusted in all
|
|
// cases, even if this requires putting a series of ../
|
|
// characters before the filename--unless it would have
|
|
// to back all the way up to the root.
|
|
//
|
|
// Returns true if the file was adjusted, false if it
|
|
// was not.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
make_relative_to(Filename directory, bool allow_backups) {
|
|
if (_filename.empty() || directory.empty() ||
|
|
_filename[0] != '/' || directory[0] != '/') {
|
|
return false;
|
|
}
|
|
|
|
standardize();
|
|
directory.standardize();
|
|
|
|
if (directory == "/") {
|
|
// Don't be silly.
|
|
return false;
|
|
}
|
|
|
|
string rel_to_file = directory.get_fullpath() + "/.";
|
|
|
|
size_t common = get_common_prefix(rel_to_file);
|
|
if (common < 2) {
|
|
// Oh, never mind.
|
|
return false;
|
|
}
|
|
|
|
string result;
|
|
int slashes = count_slashes(rel_to_file.substr(common));
|
|
if (slashes > 0 && !allow_backups) {
|
|
// Too bad; the file's not under the indicated directory.
|
|
return false;
|
|
}
|
|
|
|
for (int i = 0; i < slashes; i++) {
|
|
result += "../";
|
|
}
|
|
result += _filename.substr(common);
|
|
(*this) = result;
|
|
|
|
return true;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::find_on_searchpath
|
|
// Access: Published
|
|
// Description: Performs the reverse of the resolve_filename()
|
|
// operation: assuming that the current filename is
|
|
// fully-specified pathname (i.e. beginning with '/'),
|
|
// look on the indicated search path for a directory
|
|
// under which the file can be found. When found,
|
|
// adjust the Filename to be relative to the indicated
|
|
// directory name.
|
|
//
|
|
// Returns the index of the directory on the searchpath
|
|
// at which the file was found, or -1 if it was not
|
|
// found.
|
|
////////////////////////////////////////////////////////////////////
|
|
int Filename::
|
|
find_on_searchpath(const DSearchPath &searchpath) {
|
|
if (_filename.empty() || _filename[0] != '/') {
|
|
return -1;
|
|
}
|
|
|
|
int num_directories = searchpath.get_num_directories();
|
|
for (int i = 0; i < num_directories; i++) {
|
|
Filename directory = searchpath.get_directory(i);
|
|
directory.make_absolute();
|
|
if (make_relative_to(directory, false)) {
|
|
return i;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::scan_directory
|
|
// Access: Published
|
|
// Description: Attempts to open the named filename as if it were a
|
|
// directory and looks for the non-hidden files within
|
|
// the directory. Fills the given vector up with the
|
|
// sorted list of filenames that are local to this
|
|
// directory.
|
|
//
|
|
// It is the user's responsibility to ensure that the
|
|
// contents vector is empty before making this call;
|
|
// otherwise, the new files will be appended to it.
|
|
//
|
|
// Returns true on success, false if the directory could
|
|
// not be read for some reason.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
scan_directory(vector_string &contents) const {
|
|
assert(!get_pattern());
|
|
|
|
#if defined(WIN32_VC)
|
|
// Use Windows' FindFirstFile() / FindNextFile() to walk through the
|
|
// list of files in a directory.
|
|
size_t orig_size = contents.size();
|
|
|
|
string match;
|
|
if (empty()) {
|
|
match = "*.*";
|
|
} else {
|
|
match = to_os_specific() + "\\*.*";
|
|
}
|
|
WIN32_FIND_DATA find_data;
|
|
|
|
HANDLE handle = FindFirstFile(match.c_str(), &find_data);
|
|
if (handle == INVALID_HANDLE_VALUE) {
|
|
if (GetLastError() == ERROR_NO_MORE_FILES) {
|
|
// No matching files is not an error.
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
do {
|
|
string filename = find_data.cFileName;
|
|
if (filename != "." && filename != "..") {
|
|
contents.push_back(filename);
|
|
}
|
|
} while (FindNextFile(handle, &find_data));
|
|
|
|
bool scan_ok = (GetLastError() == ERROR_NO_MORE_FILES);
|
|
FindClose(handle);
|
|
|
|
sort(contents.begin() + orig_size, contents.end());
|
|
return scan_ok;
|
|
|
|
#elif defined(HAVE_DIRENT_H)
|
|
// Use Posix's opendir() / readir() to walk through the list of
|
|
// files in a directory.
|
|
size_t orig_size = contents.size();
|
|
|
|
string dirname;
|
|
if (empty()) {
|
|
dirname = ".";
|
|
} else {
|
|
dirname = _filename;
|
|
}
|
|
DIR *root = opendir(dirname.c_str());
|
|
if (root == (DIR *)NULL) {
|
|
perror(dirname.c_str());
|
|
return false;
|
|
}
|
|
|
|
struct dirent *d;
|
|
d = readdir(root);
|
|
while (d != (struct dirent *)NULL) {
|
|
if (d->d_name[0] != '.') {
|
|
contents.push_back(d->d_name);
|
|
}
|
|
d = readdir(root);
|
|
}
|
|
|
|
// It turns out to be a mistake to check the value of errno after
|
|
// calling readdir(), since it might have been set to non-zero
|
|
// during some internal operation of readdir(), even though there
|
|
// wasn't really a problem with scanning the directory itself.
|
|
/*
|
|
if (errno != 0 && errno != ENOENT && errno != ENOTDIR) {
|
|
cerr << "Error occurred while scanning directory " << dirname << "\n";
|
|
perror(dirname.c_str());
|
|
closedir(root);
|
|
return false;
|
|
}
|
|
*/
|
|
closedir(root);
|
|
|
|
sort(contents.begin() + orig_size, contents.end());
|
|
return true;
|
|
|
|
#elif defined(HAVE_GLOB_H)
|
|
// It's hard to imagine a system that provides glob.h but does not
|
|
// provide openddir() .. readdir(), but this code is leftover from a
|
|
// time when there was an undetected bug in the above readdir()
|
|
// loop, and it works, so we might as well keep it around for now.
|
|
string dirname;
|
|
if (empty()) {
|
|
dirname = "*";
|
|
} else if (_filename[_filename.length() - 1] == '/') {
|
|
dirname = _filename + "*";
|
|
} else {
|
|
dirname = _filename + "/*"; /* comment to fix emacs syntax hilight */
|
|
}
|
|
|
|
glob_t globbuf;
|
|
|
|
int r = glob(dirname.c_str(), GLOB_ERR, NULL, &globbuf);
|
|
|
|
if (r != 0) {
|
|
// Some error processing the match string. If our version of
|
|
// glob.h defines GLOB_NOMATCH, then we can differentiate an empty
|
|
// return result from some other kind of error.
|
|
#ifdef GLOB_NOMATCH
|
|
if (r != GLOB_NOMATCH) {
|
|
perror(dirname.c_str());
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
// Otherwise, all errors mean the same thing: no matches, but
|
|
// otherwise no problem.
|
|
return true;
|
|
}
|
|
|
|
size_t offset = dirname.size() - 1;
|
|
|
|
for (int i = 0; globbuf.gl_pathv[i] != NULL; i++) {
|
|
contents.push_back(globbuf.gl_pathv[i] + offset);
|
|
}
|
|
globfree(&globbuf);
|
|
|
|
return true;
|
|
|
|
#else
|
|
// Don't know how to scan directories!
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::open_read
|
|
// Access: Published
|
|
// Description: Opens the indicated ifstream for reading the file, if
|
|
// possible. Returns true if successful, false
|
|
// otherwise. This requires the setting of the
|
|
// set_text()/set_binary() flags to open the file
|
|
// appropriately as indicated; it is an error to call
|
|
// open_read() without first calling one of set_text()
|
|
// or set_binary().
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
open_read(ifstream &stream) const {
|
|
assert(!get_pattern());
|
|
assert(is_text() || is_binary());
|
|
|
|
ios_openmode open_mode = ios::in;
|
|
|
|
#ifdef HAVE_IOS_BINARY
|
|
// For some reason, some systems (like Irix) don't define
|
|
// ios::binary.
|
|
if (!is_text()) {
|
|
open_mode |= ios::binary;
|
|
}
|
|
#endif
|
|
|
|
string os_specific = to_os_specific();
|
|
stream.clear();
|
|
stream.open(os_specific.c_str(), open_mode);
|
|
return (!stream.fail());
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::open_write
|
|
// Access: Published
|
|
// Description: Opens the indicated ifstream for writing the file, if
|
|
// possible. Returns true if successful, false
|
|
// otherwise. This requires the setting of the
|
|
// set_text()/set_binary() flags to open the file
|
|
// appropriately as indicated; it is an error to call
|
|
// open_read() without first calling one of set_text()
|
|
// or set_binary().
|
|
//
|
|
// If truncate is true, the file is truncated to zero
|
|
// length upon opening it, if it already exists.
|
|
// Otherwise, the file is kept at its original length.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
open_write(ofstream &stream, bool truncate) const {
|
|
assert(!get_pattern());
|
|
assert(is_text() || is_binary());
|
|
|
|
ios_openmode open_mode = ios::out;
|
|
|
|
if (truncate) {
|
|
open_mode |= ios::trunc;
|
|
|
|
} else {
|
|
// Some systems insist on having ios::in set to prevent the file
|
|
// from being truncated when we open it. Makes ios::trunc kind of
|
|
// pointless, doesn't it? On the other hand, setting ios::in also
|
|
// seems to imply ios::nocreate (!), so we should only set this if
|
|
// the file already exists.
|
|
if (exists()) {
|
|
open_mode |= ios::in;
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_IOS_BINARY
|
|
// For some reason, some systems (like Irix) don't define
|
|
// ios::binary.
|
|
if (!is_text()) {
|
|
open_mode |= ios::binary;
|
|
}
|
|
#endif
|
|
|
|
stream.clear();
|
|
string os_specific = to_os_specific();
|
|
#ifdef HAVE_OPEN_MASK
|
|
stream.open(os_specific.c_str(), open_mode, 0666);
|
|
#else
|
|
stream.open(os_specific.c_str(), open_mode);
|
|
#endif
|
|
|
|
return (!stream.fail());
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::open_append
|
|
// Access: Published
|
|
// Description: Opens the indicated ifstream for writing the file, if
|
|
// possible. Returns true if successful, false
|
|
// otherwise. This requires the setting of the
|
|
// set_text()/set_binary() flags to open the file
|
|
// appropriately as indicated; it is an error to call
|
|
// open_read() without first calling one of set_text()
|
|
// or set_binary().
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
open_append(ofstream &stream) const {
|
|
assert(!get_pattern());
|
|
assert(is_text() || is_binary());
|
|
|
|
ios_openmode open_mode = ios::app;
|
|
|
|
#ifdef HAVE_IOS_BINARY
|
|
// For some reason, some systems (like Irix) don't define
|
|
// ios::binary.
|
|
if (!is_text()) {
|
|
open_mode |= ios::binary;
|
|
}
|
|
#endif
|
|
|
|
stream.clear();
|
|
string os_specific = to_os_specific();
|
|
#ifdef HAVE_OPEN_MASK
|
|
stream.open(os_specific.c_str(), open_mode, 0666);
|
|
#else
|
|
stream.open(os_specific.c_str(), open_mode);
|
|
#endif
|
|
|
|
return (!stream.fail());
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::open_read_write
|
|
// Access: Published
|
|
// Description: Opens the indicated fstream for read/write access to
|
|
// the file, if possible. Returns true if successful,
|
|
// false otherwise. This requires the setting of the
|
|
// set_text()/set_binary() flags to open the file
|
|
// appropriately as indicated; it is an error to call
|
|
// open_read_write() without first calling one of
|
|
// set_text() or set_binary().
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
open_read_write(fstream &stream) const {
|
|
assert(!get_pattern());
|
|
assert(is_text() || is_binary());
|
|
|
|
ios_openmode open_mode = ios::out | ios::in;
|
|
|
|
// Since ios::in also seems to imply ios::nocreate (!), we must
|
|
// guarantee the file already exists before we try to open it.
|
|
if (!exists()) {
|
|
touch();
|
|
}
|
|
|
|
#ifdef HAVE_IOS_BINARY
|
|
// For some reason, some systems (like Irix) don't define
|
|
// ios::binary.
|
|
if (!is_text()) {
|
|
open_mode |= ios::binary;
|
|
}
|
|
#endif
|
|
|
|
stream.clear();
|
|
string os_specific = to_os_specific();
|
|
#ifdef HAVE_OPEN_MASK
|
|
stream.open(os_specific.c_str(), open_mode, 0666);
|
|
#else
|
|
stream.open(os_specific.c_str(), open_mode);
|
|
#endif
|
|
|
|
return (!stream.fail());
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::touch
|
|
// Access: Published
|
|
// Description: Updates the modification time of the file to the
|
|
// current time. If the file does not already exist, it
|
|
// will be created. Returns true if successful, false
|
|
// if there is an error.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
touch() const {
|
|
assert(!get_pattern());
|
|
#ifdef WIN32_VC
|
|
// In Windows, we have to use the Windows API to do this reliably.
|
|
|
|
// First, guarantee the file exists (and also get its handle).
|
|
string os_specific = to_os_specific();
|
|
HANDLE fhandle;
|
|
fhandle = CreateFile(os_specific.c_str(), GENERIC_WRITE, FILE_SHARE_WRITE,
|
|
NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
|
|
if (fhandle == INVALID_HANDLE_VALUE) {
|
|
return false;
|
|
}
|
|
|
|
// Now update the file time and date.
|
|
SYSTEMTIME sysnow;
|
|
FILETIME ftnow;
|
|
GetSystemTime(&sysnow);
|
|
if (!SystemTimeToFileTime(&sysnow, &ftnow)) {
|
|
CloseHandle(fhandle);
|
|
return false;
|
|
}
|
|
|
|
if (!SetFileTime(fhandle, NULL, NULL, &ftnow)) {
|
|
CloseHandle(fhandle);
|
|
return false;
|
|
}
|
|
|
|
CloseHandle(fhandle);
|
|
return true;
|
|
|
|
#elif defined(HAVE_UTIME_H)
|
|
// Most Unix systems can do this explicitly.
|
|
|
|
string os_specific = to_os_specific();
|
|
#ifdef HAVE_CYGWIN
|
|
// In the Cygwin case, it seems we need to be sure to use the
|
|
// Cygwin-style name; some broken utime() implementation. That's
|
|
// almost the same thing as the original Panda-style name, but not
|
|
// exactly, so we first convert the Panda name to a Windows name,
|
|
// then convert it back to Cygwin, to ensure we get it exactly right
|
|
// by Cygwin rules.
|
|
{
|
|
char result[4096] = "";
|
|
cygwin_conv_to_posix_path(os_specific.c_str(), result);
|
|
os_specific = result;
|
|
}
|
|
#endif // HAVE_CYGWIN
|
|
int result = utime(os_specific.c_str(), NULL);
|
|
if (result < 0) {
|
|
if (errno == ENOENT) {
|
|
// So the file doesn't already exist; create it.
|
|
int fd = creat(os_specific.c_str(), 0666);
|
|
if (fd < 0) {
|
|
perror(os_specific.c_str());
|
|
return false;
|
|
}
|
|
close(fd);
|
|
return true;
|
|
}
|
|
perror(os_specific.c_str());
|
|
return false;
|
|
}
|
|
return true;
|
|
#else // WIN32, HAVE_UTIME_H
|
|
// Other systems may not have an explicit control over the
|
|
// modification time. For these systems, we'll just temporarily
|
|
// open the file in append mode, then close it again (it gets closed
|
|
// when the ofstream goes out of scope).
|
|
ofstream file;
|
|
return open_append(file);
|
|
#endif // WIN32, HAVE_UTIME_H
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::chdir
|
|
// Access: Published
|
|
// Description: Changes directory to the specified location.
|
|
// Returns true if successful, false if failure.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
chdir() const {
|
|
Filename os_specific = to_os_specific();
|
|
return (::chdir(os_specific.c_str()) >= 0);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::unlink
|
|
// Access: Published
|
|
// Description: Permanently deletes the file associated with the
|
|
// filename, if possible. Returns true if successful,
|
|
// false if failure (for instance, because the file did
|
|
// not exist, or because permissions were inadequate).
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
unlink() const {
|
|
assert(!get_pattern());
|
|
string os_specific = to_os_specific();
|
|
return (::unlink(os_specific.c_str()) == 0);
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::rename_to
|
|
// Access: Published
|
|
// Description: Renames the file to the indicated new filename. If
|
|
// the new filename is in a different directory, this
|
|
// will perform a move. Returns true if successful,
|
|
// false if failure.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
rename_to(const Filename &other) const {
|
|
assert(!get_pattern());
|
|
string os_specific = to_os_specific();
|
|
string other_os_specific = other.to_os_specific();
|
|
return (rename(os_specific.c_str(),
|
|
other_os_specific.c_str()) == 0);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::make_dir
|
|
// Access: Published
|
|
// Description: Creates all the directories in the path to the file
|
|
// specified in the filename, except for the basename
|
|
// itself. This assumes that the Filename contains the
|
|
// name of a file, not a directory name; it ensures that
|
|
// the directory containing the file exists.
|
|
//
|
|
// However, if the filename ends in a slash, it assumes
|
|
// the Filename represents the name of a directory, and
|
|
// creates all the paths.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
make_dir() const {
|
|
assert(!get_pattern());
|
|
if (empty()) {
|
|
return false;
|
|
}
|
|
Filename path;
|
|
if (_filename[_filename.length() - 1] == '/') {
|
|
// The Filename ends in a slash; it represents a directory.
|
|
path = (*this);
|
|
|
|
} else {
|
|
// The Filename does not end in a slash; it represents a file.
|
|
path = get_dirname();
|
|
}
|
|
|
|
if (path.empty()) {
|
|
return false;
|
|
}
|
|
string dirname = path.get_fullpath();
|
|
|
|
// First, make sure everything up to the last path is known. We
|
|
// don't care too much if any of these fail; maybe they failed
|
|
// because the directory was already there.
|
|
size_t slash = dirname.find('/');
|
|
while (slash != string::npos) {
|
|
Filename component(dirname.substr(0, slash));
|
|
string os_specific = component.to_os_specific();
|
|
#ifndef WIN32_VC
|
|
mkdir(os_specific.c_str(), 0777);
|
|
#else
|
|
mkdir(os_specific.c_str());
|
|
#endif
|
|
slash = dirname.find('/', slash + 1);
|
|
}
|
|
|
|
// Now make the last one, and check the return value.
|
|
Filename component(dirname);
|
|
string os_specific = component.to_os_specific();
|
|
#ifndef WIN32_VC
|
|
int result = mkdir(os_specific.c_str(), 0777);
|
|
#else
|
|
int result = mkdir(os_specific.c_str());
|
|
#endif
|
|
|
|
return (result == 0);
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::atomic_compare_and_exchange_contents
|
|
// Access: Public
|
|
// Description: Uses native file-locking mechanisms to atomically
|
|
// replace the contents of a (small) file with the
|
|
// specified contents, assuming it hasn't changed since
|
|
// the last time the file was read.
|
|
//
|
|
// This is designed to be similar to
|
|
// AtomicAdjust::compare_and_exchange(). The method
|
|
// writes new_contents to the file, completely replacing
|
|
// the original contents; but only if the original
|
|
// contents exactly matched old_contents. If the file
|
|
// was modified, returns true. If, however, the
|
|
// original contents of the file did not exactly match
|
|
// old_contents, then the file is not modified, and
|
|
// false is returned. In either case, orig_contents is
|
|
// filled with the original contents of the file.
|
|
//
|
|
// If the file does not exist, it is implicitly created,
|
|
// and its original contents are empty.
|
|
//
|
|
// If an I/O error occurs on write, some of the file may
|
|
// or may not have been written, and false is returned.
|
|
//
|
|
// Expressed in pseudo-code, the logic is:
|
|
//
|
|
// orig_contents = file.read();
|
|
// if (orig_contents == old_contents) {
|
|
// file.write(new_contents);
|
|
// return true;
|
|
// }
|
|
// return false;
|
|
//
|
|
// The operation is guaranteed to be atomic only if the
|
|
// only operations that read and write to this file are
|
|
// atomic_compare_and_exchange_contents() and
|
|
// atomic_read_contents().
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
atomic_compare_and_exchange_contents(string &orig_contents,
|
|
const string &old_contents,
|
|
const string &new_contents) const {
|
|
#ifdef WIN32_VC
|
|
string os_specific = to_os_specific();
|
|
HANDLE hfile = CreateFile(os_specific.c_str(), GENERIC_READ | GENERIC_WRITE,
|
|
0, NULL, OPEN_ALWAYS,
|
|
FILE_ATTRIBUTE_NORMAL, NULL);
|
|
while (hfile == INVALID_HANDLE_VALUE) {
|
|
DWORD error = GetLastError();
|
|
if (error == ERROR_SHARING_VIOLATION) {
|
|
// If the file is locked by another process, yield and try again.
|
|
Sleep(0);
|
|
hfile = CreateFile(os_specific.c_str(), GENERIC_READ | GENERIC_WRITE,
|
|
0, NULL, OPEN_ALWAYS,
|
|
FILE_ATTRIBUTE_NORMAL, NULL);
|
|
} else {
|
|
cerr << "Couldn't open file: " << os_specific
|
|
<< ", error " << error << "\n";
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (hfile == INVALID_HANDLE_VALUE) {
|
|
cerr << "Couldn't open file: " << os_specific
|
|
<< ", error " << GetLastError() << "\n";
|
|
return false;
|
|
}
|
|
|
|
static const size_t buf_size = 512;
|
|
char buf[buf_size];
|
|
|
|
orig_contents = string();
|
|
|
|
DWORD bytes_read;
|
|
if (!ReadFile(hfile, buf, buf_size, &bytes_read, NULL)) {
|
|
cerr << "Error reading file: " << os_specific
|
|
<< ", error " << GetLastError() << "\n";
|
|
CloseHandle(hfile);
|
|
return false;
|
|
}
|
|
while (bytes_read > 0) {
|
|
orig_contents += string(buf, bytes_read);
|
|
|
|
if (!ReadFile(hfile, buf, buf_size, &bytes_read, NULL)) {
|
|
cerr << "Error reading file: " << os_specific
|
|
<< ", error " << GetLastError() << "\n";
|
|
CloseHandle(hfile);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool match = false;
|
|
if (orig_contents == old_contents) {
|
|
match = true;
|
|
SetFilePointer(hfile, 0, 0, FILE_BEGIN);
|
|
DWORD bytes_written;
|
|
if (!WriteFile(hfile, new_contents.data(), new_contents.size(),
|
|
&bytes_written, NULL)) {
|
|
cerr << "Error writing file: " << os_specific
|
|
<< ", error " << GetLastError() << "\n";
|
|
CloseHandle(hfile);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
CloseHandle(hfile);
|
|
return match;
|
|
|
|
#else // WIN32_VC
|
|
string os_specific = to_os_specific();
|
|
int fd = open(os_specific.c_str(), O_RDWR | O_CREAT, 0666);
|
|
if (fd < 0) {
|
|
perror(os_specific.c_str());
|
|
return false;
|
|
}
|
|
|
|
static const size_t buf_size = 512;
|
|
char buf[buf_size];
|
|
|
|
orig_contents = string();
|
|
|
|
lockf(fd, F_LOCK, 0);
|
|
|
|
size_t bytes_read = read(fd, buf, buf_size);
|
|
while (bytes_read > 0) {
|
|
orig_contents += string(buf, bytes_read);
|
|
bytes_read = read(fd, buf, buf_size);
|
|
}
|
|
|
|
if (bytes_read < 0) {
|
|
perror(os_specific.c_str());
|
|
close(fd);
|
|
return false;
|
|
}
|
|
|
|
bool match = false;
|
|
if (orig_contents == old_contents) {
|
|
match = true;
|
|
lseek(fd, 0, SEEK_SET);
|
|
ssize_t bytes_written = write(fd, new_contents.data(), new_contents.size());
|
|
if (bytes_written < 0) {
|
|
perror(os_specific.c_str());
|
|
close(fd);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (close(fd) < 0) {
|
|
perror(os_specific.c_str());
|
|
return false;
|
|
}
|
|
|
|
return match;
|
|
#endif // WIN32_VC
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::atomic_read_contents
|
|
// Access: Public
|
|
// Description: Uses native file-locking mechanisms to atomically
|
|
// read the contents of a (small) file. This is the
|
|
// only way to read a file protected by
|
|
// atomic_compare_and_exchange_contents(), and be
|
|
// confident that the read operation is actually atomic
|
|
// with respect to that method.
|
|
//
|
|
// If the file does not exist, it is implicitly created,
|
|
// and its contents are empty.
|
|
//
|
|
// If the file is read successfully, fills its contents
|
|
// in the indicated string, and returns true. If the
|
|
// file cannot be read, returns false.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
atomic_read_contents(string &contents) const {
|
|
#ifdef WIN32_VC
|
|
string os_specific = to_os_specific();
|
|
HANDLE hfile = CreateFile(os_specific.c_str(), GENERIC_READ,
|
|
FILE_SHARE_READ, NULL, OPEN_ALWAYS,
|
|
FILE_ATTRIBUTE_NORMAL, NULL);
|
|
while (hfile == INVALID_HANDLE_VALUE) {
|
|
DWORD error = GetLastError();
|
|
if (error == ERROR_SHARING_VIOLATION) {
|
|
// If the file is locked by another process, yield and try again.
|
|
Sleep(0);
|
|
hfile = CreateFile(os_specific.c_str(), GENERIC_READ,
|
|
FILE_SHARE_READ, NULL, OPEN_ALWAYS,
|
|
FILE_ATTRIBUTE_NORMAL, NULL);
|
|
} else {
|
|
cerr << "Couldn't open file: " << os_specific
|
|
<< ", error " << error << "\n";
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static const size_t buf_size = 512;
|
|
char buf[buf_size];
|
|
|
|
contents = string();
|
|
|
|
DWORD bytes_read;
|
|
if (!ReadFile(hfile, buf, buf_size, &bytes_read, NULL)) {
|
|
cerr << "Error reading file: " << os_specific
|
|
<< ", error " << GetLastError() << "\n";
|
|
CloseHandle(hfile);
|
|
return false;
|
|
}
|
|
while (bytes_read > 0) {
|
|
contents += string(buf, bytes_read);
|
|
|
|
if (!ReadFile(hfile, buf, buf_size, &bytes_read, NULL)) {
|
|
cerr << "Error reading file: " << os_specific
|
|
<< ", error " << GetLastError() << "\n";
|
|
CloseHandle(hfile);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
CloseHandle(hfile);
|
|
return true;
|
|
|
|
#else // WIN32_VC
|
|
string os_specific = to_os_specific();
|
|
int fd = open(os_specific.c_str(), O_RDONLY | O_CREAT, 0666);
|
|
if (fd < 0) {
|
|
perror(os_specific.c_str());
|
|
return false;
|
|
}
|
|
|
|
static const size_t buf_size = 512;
|
|
char buf[buf_size];
|
|
|
|
contents = string();
|
|
|
|
lockf(fd, F_LOCK, 0);
|
|
|
|
size_t bytes_read = read(fd, buf, buf_size);
|
|
while (bytes_read > 0) {
|
|
contents += string(buf, bytes_read);
|
|
bytes_read = read(fd, buf, buf_size);
|
|
}
|
|
|
|
if (bytes_read < 0) {
|
|
perror(os_specific.c_str());
|
|
close(fd);
|
|
return false;
|
|
}
|
|
|
|
close(fd);
|
|
return true;
|
|
#endif // WIN32_VC
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::locate_basename
|
|
// Access: Protected
|
|
// Description: After the string has been reassigned, search for the
|
|
// slash marking the beginning of the basename, and set
|
|
// _dirname_end and _basename_start correctly.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
locate_basename() {
|
|
// Scan for the last slash, which marks the end of the directory
|
|
// part.
|
|
if (_filename.empty()) {
|
|
_dirname_end = 0;
|
|
_basename_start = 0;
|
|
|
|
} else {
|
|
|
|
string::size_type slash = _filename.rfind('/');
|
|
if (slash != string::npos) {
|
|
_basename_start = slash + 1;
|
|
_dirname_end = _basename_start;
|
|
|
|
// One exception: in case there are multiple slashes in a row,
|
|
// we want to treat them as a single slash. The directory
|
|
// therefore actually ends at the first of these; back up a bit.
|
|
while (_dirname_end > 0 && _filename[_dirname_end-1] == '/') {
|
|
_dirname_end--;
|
|
}
|
|
|
|
// Another exception: if the dirname was nothing but slashes, it
|
|
// was the root directory, or / itself. In this case the dirname
|
|
// does include the terminal slash (of course).
|
|
if (_dirname_end == 0) {
|
|
_dirname_end = 1;
|
|
}
|
|
|
|
} else {
|
|
_dirname_end = 0;
|
|
_basename_start = 0;
|
|
}
|
|
}
|
|
|
|
// Now:
|
|
|
|
// _dirname_end is the last slash character, or 0 if there are no
|
|
// slash characters.
|
|
|
|
// _basename_start is the character after the last slash character,
|
|
// or 0 if there are no slash characters.
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::locate_extension
|
|
// Access: Protected
|
|
// Description: Once the end of the directory prefix has been found,
|
|
// and _dirname_end and _basename_start are set
|
|
// correctly, search for the dot marking the beginning
|
|
// of the extension, and set _basename_end and
|
|
// _extension_start correctly.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
locate_extension() {
|
|
// Now scan for the last dot after that slash.
|
|
if (_filename.empty()) {
|
|
_basename_end = string::npos;
|
|
_extension_start = string::npos;
|
|
|
|
} else {
|
|
string::size_type dot = _filename.length() - 1;
|
|
|
|
while (dot+1 > _basename_start && _filename[dot] != '.') {
|
|
--dot;
|
|
}
|
|
|
|
if (dot+1 > _basename_start) {
|
|
_basename_end = dot;
|
|
_extension_start = dot + 1;
|
|
} else {
|
|
_basename_end = string::npos;
|
|
_extension_start = string::npos;
|
|
}
|
|
}
|
|
|
|
// Now:
|
|
|
|
// _basename_end is the last dot, or npos if there is no dot.
|
|
|
|
// _extension_start is the character after the last dot, or npos if
|
|
// there is no dot.
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::locate_hash
|
|
// Access: Protected
|
|
// Description: Identifies the part of the filename that contains the
|
|
// sequence of hash marks, if any.
|
|
////////////////////////////////////////////////////////////////////
|
|
void Filename::
|
|
locate_hash() {
|
|
if (!get_pattern()) {
|
|
// If it's not a pattern-type filename, these are always set to
|
|
// the end of the string.
|
|
_hash_end = string::npos;
|
|
_hash_start = string::npos;
|
|
|
|
} else {
|
|
// If it is a pattern-type filename, we must search for the hash
|
|
// marks, which could be anywhere (but are usually toward the
|
|
// end).
|
|
_hash_end = _filename.rfind('#');
|
|
if (_hash_end == string::npos) {
|
|
_hash_end = string::npos;
|
|
_hash_start = string::npos;
|
|
|
|
} else {
|
|
_hash_start = _hash_end;
|
|
++_hash_end;
|
|
while (_hash_start > 0 && _filename[_hash_start - 1] == '#') {
|
|
--_hash_start;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::get_common_prefix
|
|
// Access: Protected
|
|
// Description: Returns the length of the longest common initial
|
|
// substring of this string and the other one that ends
|
|
// in a slash. This is the lowest directory common to
|
|
// both filenames.
|
|
////////////////////////////////////////////////////////////////////
|
|
size_t Filename::
|
|
get_common_prefix(const string &other) const {
|
|
size_t len = 0;
|
|
|
|
// First, get the length of the common initial substring.
|
|
while (len < length() && len < other.length() &&
|
|
_filename[len] == other[len]) {
|
|
len++;
|
|
}
|
|
|
|
// Now insist that it ends in a slash.
|
|
while (len > 0 && _filename[len-1] != '/') {
|
|
len--;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::count_slashes
|
|
// Access: Protected, Static
|
|
// Description: Returns the number of non-consecutive slashes in the
|
|
// indicated string, not counting a terminal slash.
|
|
////////////////////////////////////////////////////////////////////
|
|
int Filename::
|
|
count_slashes(const string &str) {
|
|
int count = 0;
|
|
string::const_iterator si;
|
|
si = str.begin();
|
|
|
|
while (si != str.end()) {
|
|
if (*si == '/') {
|
|
count++;
|
|
|
|
// Skip consecutive slashes.
|
|
++si;
|
|
while (*si == '/') {
|
|
++si;
|
|
}
|
|
if (si == str.end()) {
|
|
// Oops, that was a terminal slash. Don't count it.
|
|
count--;
|
|
}
|
|
|
|
} else {
|
|
++si;
|
|
}
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: Filename::r_make_canonical
|
|
// Access: Protected
|
|
// Description: The recursive implementation of make_canonical().
|
|
////////////////////////////////////////////////////////////////////
|
|
bool Filename::
|
|
r_make_canonical(const Filename &cwd) {
|
|
if (get_fullpath() == "/") {
|
|
// If we reached the root, the whole path doesn't exist. Report
|
|
// failure.
|
|
return false;
|
|
}
|
|
|
|
// First, try to cd to the filename directly.
|
|
string os_specific = to_os_specific();
|
|
|
|
if (::chdir(os_specific.c_str()) >= 0) {
|
|
// That worked, save the full path string.
|
|
(*this) = ExecutionEnvironment::get_cwd();
|
|
|
|
// And restore the current working directory.
|
|
string osdir = cwd.to_os_specific();
|
|
if (::chdir(osdir.c_str()) < 0) {
|
|
cerr << "Error! Cannot change back to " << cwd << "\n";
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// That didn't work; maybe it's not a directory. Recursively go to
|
|
// the directory above.
|
|
|
|
Filename dir(get_dirname());
|
|
|
|
if (dir.empty()) {
|
|
// No dirname means the file is in this directory.
|
|
set_dirname(cwd);
|
|
return true;
|
|
}
|
|
|
|
if (!dir.r_make_canonical(cwd)) {
|
|
return false;
|
|
}
|
|
set_dirname(dir);
|
|
return true;
|
|
}
|
|
|