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* re.c (rb_reg_s_union, Init_Regexp): new method `Regexp.union'.

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* lib/pathname.rb (realpath): examine Dir.pwd because it may have
  symlinks.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4856 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2003-10-29 08:31:43 +00:00
parent 8bf300f149
commit a5c350aaba
3 changed files with 122 additions and 34 deletions
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7
ChangeLog
View file

@ -1,3 +1,10 @@
Wed Oct 29 17:27:05 2003 Tanaka Akira <akr@m17n.org>
* re.c (rb_reg_s_union, Init_Regexp): new method `Regexp.union'.
* lib/pathname.rb (realpath): examine Dir.pwd because it may have
symlinks.
Wed Oct 29 17:16:31 2003 Nobuyoshi Nakada <nobu@ruby-lang.org>
* eval.c (rb_longjmp): must not disturb original jump.

72
lib/pathname.rb
View file

@ -105,27 +105,29 @@ class Pathname
Pathname.new(path)
end
# realpath returns real pathname of self in actual filesystem.
# realpath returns a real pathname of self in actual filesystem.
# The real pathname doesn't contain a symlink and useless dots.
#
# If false is given for the optional argument force_absolute,
# it may return relative pathname.
# Otherwise it returns absolute pathname.
def realpath(force_absolute=true)
# Check file existence at first by File.stat.
# This test detects ELOOP.
#
# /tmp/a -> a
# /tmp/b -> b/b
# /tmp/c -> ./c
# /tmp/d -> ../tmp/d
File.stat(@path)
top = %r{\A/} =~ @path ? '/' : ''
unresolved = @path.scan(%r{[^/]+})
if %r{\A/} =~ @path
top = '/'
unresolved = @path.scan(%r{[^/]+})
elsif force_absolute
# Although POSIX getcwd returns a pathname which contains no symlink,
# 4.4BSD-Lite2 derived getcwd may return the environment variable $PWD
# which may contain a symlink.
# So the return value of Dir.pwd should be examined.
top = '/'
unresolved = Dir.pwd.scan(%r{[^/]+}) + @path.scan(%r{[^/]+})
else
top = ''
unresolved = @path.scan(%r{[^/]+})
end
resolved = []
checked_path = {}
until unresolved.empty?
case unresolved.last
when '.'
@ -133,34 +135,36 @@ class Pathname
when '..'
resolved.unshift unresolved.pop
else
path = top + unresolved.join('/')
raise Errno::ELOOP.new(path) if checked_path[path]
checked_path[path] = true
if File.lstat(path).symlink?
link = File.readlink(path)
if %r{\A/} =~ link
loop_check = {}
while (stat = File.lstat(path = top + unresolved.join('/'))).symlink?
symlink_id = "#{stat.dev}:#{stat.ino}"
raise Errno::ELOOP.new(path) if loop_check[symlink_id]
loop_check[symlink_id] = true
if %r{\A/} =~ (link = File.readlink(path))
top = '/'
unresolved = link.scan(%r{[^/]+})
else
unresolved.pop
unresolved.concat link.scan(%r{[^/]+})
unresolved[-1,1] = link.scan(%r{[^/]+})
end
end
next if (filename = unresolved.pop) == '.'
if filename != '..' && resolved.first == '..'
resolved.shift
else
resolved.unshift unresolved.pop
resolved.unshift filename
end
end
end
if resolved.empty?
path = top.empty? ? '.' : top
else
path = top + resolved.join('/')
if top == '/'
resolved.shift while resolved[0] == '..'
end
# Note that Dir.pwd has no symlinks.
path = File.join(Dir.pwd, path) if %r{\A/} !~ path && force_absolute
Pathname.new(path).cleanpath
if resolved.empty?
Pathname.new(top.empty? ? '.' : '/')
else
Pathname.new(top + resolved.join('/'))
end
end
# parent method returns parent directory, i.e. ".." is joined at last.
@ -297,7 +301,7 @@ end
# IO
class Pathname
# Pathname#each_line iterates over lines of the file.
# It's yields String objects for each line.
# It's yields a String object for each line.
#
# This method is exist since 1.8.1.
def each_line(*args, &block) IO.foreach(@path, *args, &block) end

77
re.c
View file

@ -1484,6 +1484,82 @@ rb_reg_options(re)
return options;
}
static VALUE
rb_reg_s_union(argc, argv)
int argc;
VALUE *argv;
{
if (argc == 0) {
VALUE args[1];
args[0] = rb_str_new2("(?!)");
return rb_class_new_instance(1, args, rb_cRegexp);
}
else if (argc == 1) {
VALUE v;
v = rb_check_convert_type(argv[0], T_REGEXP, "Regexp", "to_regexp");
if (!NIL_P(v))
return v;
else {
VALUE args[1];
args[0] = rb_reg_s_quote(argc, argv);
return rb_class_new_instance(1, args, rb_cRegexp);
}
}
else {
int i, kcode = -1;
VALUE kcode_re = Qnil;
VALUE source = rb_str_buf_new(0);
VALUE args[3];
for (i = 0; i < argc; i++) {
volatile VALUE v;
if (0 < i)
rb_str_buf_cat2(source, "|");
v = rb_check_convert_type(argv[i], T_REGEXP, "Regexp", "to_regexp");
if (!NIL_P(v)) {
if (FL_TEST(v, KCODE_FIXED)) {
if (kcode == -1) {
kcode_re = v;
kcode = RBASIC(v)->flags & KCODE_MASK;
}
else if ((RBASIC(v)->flags & KCODE_MASK) != kcode) {
volatile VALUE str1, str2;
str1 = rb_inspect(kcode_re);
str2 = rb_inspect(v);
rb_raise(rb_eArgError, "mixed kcode: %s and %s",
RSTRING(str1)->ptr, RSTRING(str2)->ptr);
}
}
v = rb_reg_to_s(v);
}
else {
args[0] = argv[i];
v = rb_reg_s_quote(1, args);
}
rb_str_buf_append(source, v);
}
args[0] = source;
args[1] = Qnil;
switch (kcode) {
case -1:
args[2] = Qnil;
break;
case KCODE_NONE:
args[2] = rb_str_new2("n");
break;
case KCODE_EUC:
args[2] = rb_str_new2("e");
break;
case KCODE_SJIS:
args[2] = rb_str_new2("s");
break;
case KCODE_UTF8:
args[2] = rb_str_new2("u");
break;
}
return rb_class_new_instance(3, args, rb_cRegexp);
}
}
static VALUE
rb_reg_init_copy(copy, re)
VALUE copy, re;
@ -1732,6 +1808,7 @@ Init_Regexp()
rb_define_singleton_method(rb_cRegexp, "compile", rb_class_new_instance, -1);
rb_define_singleton_method(rb_cRegexp, "quote", rb_reg_s_quote, -1);
rb_define_singleton_method(rb_cRegexp, "escape", rb_reg_s_quote, -1);
rb_define_singleton_method(rb_cRegexp, "union", rb_reg_s_union, -1);
rb_define_singleton_method(rb_cRegexp, "last_match", rb_reg_s_last_match, -1);
rb_define_method(rb_cRegexp, "initialize", rb_reg_initialize_m, -1);