--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/upmana/mercurial/manifest.py	Fri Oct 30 22:21:40 2009 -0500
@@ -0,0 +1,201 @@
+# manifest.py - manifest revision class for mercurial
+#
+# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+
+from i18n import _
+import mdiff, parsers, error, revlog
+import array, struct
+
+class manifestdict(dict):
+    def __init__(self, mapping=None, flags=None):
+        if mapping is None: mapping = {}
+        if flags is None: flags = {}
+        dict.__init__(self, mapping)
+        self._flags = flags
+    def flags(self, f):
+        return self._flags.get(f, "")
+    def set(self, f, flags):
+        self._flags[f] = flags
+    def copy(self):
+        return manifestdict(dict.copy(self), dict.copy(self._flags))
+
+class manifest(revlog.revlog):
+    def __init__(self, opener):
+        self.mapcache = None
+        self.listcache = None
+        revlog.revlog.__init__(self, opener, "00manifest.i")
+
+    def parse(self, lines):
+        mfdict = manifestdict()
+        parsers.parse_manifest(mfdict, mfdict._flags, lines)
+        return mfdict
+
+    def readdelta(self, node):
+        r = self.rev(node)
+        return self.parse(mdiff.patchtext(self.revdiff(r - 1, r)))
+
+    def read(self, node):
+        if node == revlog.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)
+        mapping = self.parse(text)
+        self.mapcache = (node, mapping)
+        return mapping
+
+    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
+        if not s:
+            return (lo, lo)
+        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, flags) 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 revlog.bin(n[:40]), n[40:-1]
+
+    def add(self, map, 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 ])
+
+        def checkforbidden(l):
+            for f in l:
+                if '\n' in f or '\r' in f:
+                    raise error.RevlogError(
+                        _("'\\n' and '\\r' disallowed in filenames: %r") % f)
+
+        # if we're using the listcache, make sure it is valid and
+        # parented by the same node we're diffing against
+        if not (changed and self.listcache and p1 and self.mapcache[0] == p1):
+            files = sorted(map)
+            checkforbidden(files)
+
+            # if this is changed to support newlines in filenames,
+            # be sure to check the templates/ dir again (especially *-raw.tmpl)
+            hex, flags = revlog.hex, map.flags
+            text = ["%s\000%s%s\n" % (f, hex(map[f]), flags(f))
+                    for f in files]
+            self.listcache = array.array('c', "".join(text))
+            cachedelta = None
+        else:
+            addlist = self.listcache
+
+            checkforbidden(changed[0])
+            # 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, revlog.hex(map[f]), map.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") % 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