Switch to simpler manifestdict

mercurial/manifest.py

@@ -1,214 +1,202 b''
 # manifest.py - manifest revision class for mercurial
 #
 # Copyright 2005 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 from revlog import *
 from i18n import gettext as _
 from demandload import *
 demandload(globals(), "array bisect struct")
 
 class manifestdict(dict):
-    def __init__(self, mapping={}):
+    def __init__(self, mapping={}, flags={}):
         dict.__init__(self, mapping)
-    def __getitem__(self, f):
-        return self.node(f)
-    def get(self, f, default=None):
-        try:
-            return dict.__getitem__(self, f)[:20]
-        except KeyError:
-            return default
-    def __setitem__(self, f, node):
-        fl = self.flags(f)
-        dict.__setitem__(self, f, node + fl)
-    def node(self, f):
-        return dict.__getitem__(self, f)[:20]
+        self._flags = flags
     def flags(self, f):
-        return dict.get(self, f, "")[20:]
+        return self._flags.get(f, "")
     def execf(self, f):
         "test for executable in manifest flags"
         return "x" in self.flags(f)
     def linkf(self, f):
         "test for symlink in manifest flags"
         return "l" in self.flags(f)
-    def rawset(self, f, node, flags):
-        dict.__setitem__(self, f, node + flags)
+    def rawset(self, f, entry):
+        self[f] = bin(entry[:40])
+        fl = entry[40:-1]
+        if fl: self._flags[f] = fl
     def set(self, f, execf=False, linkf=False):
-        n = dict.get(self, f, nullid)[:20]
-        fl = ""
-        if execf: fl = "x"
-        if linkf: fl = "l"
-        dict.__setitem__(self, f, n + fl)
+        if execf: self._flags[f] = "x"
+        if linkf: self._flags[f] = "x"
     def copy(self):
-        return manifestdict(dict.copy(self))
+        return manifestdict(dict.copy(self), dict.copy(self._flags))
 
 class manifest(revlog):
     def __init__(self, opener, defversion=REVLOGV0):
         self.mapcache = None
         self.listcache = None
         revlog.__init__(self, opener, "00manifest.i", "00manifest.d",
                         defversion)
 
     def read(self, node):
         if node == nullid: return manifestdict() # don't upset local cache
         if self.mapcache and self.mapcache[0] == node:
             return self.mapcache[1]
         text = self.revision(node)
         self.listcache = array.array('c', text)
         lines = text.splitlines(1)
         mapping = manifestdict()
         for l in lines:
             (f, n) = l.split('\0')
-            mapping.rawset(f, bin(n[:40]), n[40:-1])
+            mapping.rawset(f, n)
         self.mapcache = (node, mapping)
         return mapping
 
     def readflags(self, node):
         return self.read(node)
 
     def diff(self, a, b):
         return mdiff.textdiff(str(a), str(b))
 
     def _search(self, m, s, lo=0, hi=None):
         '''return a tuple (start, end) that says where to find s within m.
 
         If the string is found m[start:end] are the line containing
         that string.  If start == end the string was not found and
         they indicate the proper sorted insertion point.  This was
         taken from bisect_left, and modified to find line start/end as
         it goes along.
 
         m should be a buffer or a string
         s is a string'''
         def advance(i, c):
             while i < lenm and m[i] != c:
                 i += 1
             return i
         lenm = len(m)
         if not hi:
             hi = lenm
         while lo < hi:
             mid = (lo + hi) // 2
             start = mid
             while start > 0 and m[start-1] != '\n':
                 start -= 1
             end = advance(start, '\0')
             if m[start:end] < s:
                 # we know that after the null there are 40 bytes of sha1
                 # this translates to the bisect lo = mid + 1
                 lo = advance(end + 40, '\n') + 1
             else:
                 # this translates to the bisect hi = mid
                 hi = start
         end = advance(lo, '\0')
         found = m[lo:end]
         if cmp(s, found) == 0:
             # we know that after the null there are 40 bytes of sha1
             end = advance(end + 40, '\n')
             return (lo, end+1)
         else:
             return (lo, lo)
 
     def find(self, node, f):
         '''look up entry for a single file efficiently.
         return (node, flag) pair if found, (None, None) if not.'''
         if self.mapcache and node == self.mapcache[0]:
             return self.mapcache[1].get(f), self.mapcache[1].flags(f)
         text = self.revision(node)
         start, end = self._search(text, f)
         if start == end:
             return None, None
         l = text[start:end]
         f, n = l.split('\0')
         return bin(n[:40]), n[40:-1] == 'x'
 
     def add(self, map, flags, transaction, link, p1=None, p2=None,
             changed=None):
         # apply the changes collected during the bisect loop to our addlist
         # return a delta suitable for addrevision
         def addlistdelta(addlist, x):
             # start from the bottom up
             # so changes to the offsets don't mess things up.
             i = len(x)
             while i > 0:
                 i -= 1
                 start = x[i][0]
                 end = x[i][1]
                 if x[i][2]:
                     addlist[start:end] = array.array('c', x[i][2])
                 else:
                     del addlist[start:end]
             return "".join([struct.pack(">lll", d[0], d[1], len(d[2])) + d[2] \
                             for d in x ])
 
         # if we're using the listcache, make sure it is valid and
         # parented by the same node we're diffing against
         if not changed or not self.listcache or not p1 or \
                self.mapcache[0] != p1:
             files = map.keys()
             files.sort()
 
             # if this is changed to support newlines in filenames,
             # be sure to check the templates/ dir again (especially *-raw.tmpl)
             text = ["%s\000%s%s\n" % (f, hex(map[f]), flags.flags(f)) for f in files]
             self.listcache = array.array('c', "".join(text))
             cachedelta = None
         else:
             addlist = self.listcache
 
             # combine the changed lists into one list for sorting
             work = [[x, 0] for x in changed[0]]
             work[len(work):] = [[x, 1] for x in changed[1]]
             work.sort()
 
             delta = []
             dstart = None
             dend = None
             dline = [""]
             start = 0
             # zero copy representation of addlist as a buffer
             addbuf = buffer(addlist)
 
             # start with a readonly loop that finds the offset of
             # each line and creates the deltas
             for w in work:
                 f = w[0]
                 # bs will either be the index of the item or the insert point
                 start, end = self._search(addbuf, f, start)
                 if w[1] == 0:
                     l = "%s\000%s%s\n" % (f, hex(map[f]), flags.flags(f))
                 else:
                     l = ""
                 if start == end and w[1] == 1:
                     # item we want to delete was not found, error out
                     raise AssertionError(
                             _("failed to remove %s from manifest\n") % f)
                 if dstart != None and dstart <= start and dend >= start:
                     if dend < end:
                         dend = end
                     if l:
                         dline.append(l)
                 else:
                     if dstart != None:
                         delta.append([dstart, dend, "".join(dline)])
                     dstart = start
                     dend = end
                     dline = [l]
 
             if dstart != None:
                 delta.append([dstart, dend, "".join(dline)])
             # apply the delta to the addlist, and get a delta for addrevision
             cachedelta = addlistdelta(addlist, delta)
 
             # the delta is only valid if we've been processing the tip revision
             if self.mapcache[0] != self.tip():
                 cachedelta = None
             self.listcache = addlist
 
         n = self.addrevision(buffer(self.listcache), transaction, link, p1,  \
                              p2, cachedelta)
         self.mapcache = (n, map)
 
         return n