py3: use bytearray() instead of array('c', ...) constructions

py3: use bytearray() instead of array('c', ...) constructions

Portable from 2.6-3.6.

--- a/mercurial/branchmap.py	Sat Mar 11 20:58:26 2017 -0500
+++ b/mercurial/branchmap.py	Sun Mar 12 03:32:21 2017 -0400
@@ -357,7 +357,7 @@
         assert repo.filtername is None
         self._repo = repo
         self._names = [] # branch names in local encoding with static index
-        self._rbcrevs = array('c') # structs of type _rbcrecfmt
+        self._rbcrevs = bytearray()
         self._rbcsnameslen = 0 # length of names read at _rbcsnameslen
         try:
             bndata = repo.vfs.read(_rbcnames)
@@ -371,7 +371,7 @@
         if self._names:
             try:
                 data = repo.vfs.read(_rbcrevs)
-                self._rbcrevs.fromstring(data)
+                self._rbcrevs[:] = data
             except (IOError, OSError) as inst:
                 repo.ui.debug("couldn't read revision branch cache: %s\n" %
                               inst)
@@ -390,8 +390,7 @@
         self._rbcnamescount = 0
         self._namesreverse.clear()
         self._rbcrevslen = len(self._repo.changelog)
-        self._rbcrevs = array('c')
-        self._rbcrevs.fromstring('\0' * (self._rbcrevslen * _rbcrecsize))
+        self._rbcrevs = bytearray(self._rbcrevslen * _rbcrecsize)
 
     def branchinfo(self, rev):
         """Return branch name and close flag for rev, using and updating
@@ -454,8 +453,7 @@
     def _setcachedata(self, rev, node, branchidx):
         """Writes the node's branch data to the in-memory cache data."""
         rbcrevidx = rev * _rbcrecsize
-        rec = array('c')
-        rec.fromstring(pack(_rbcrecfmt, node, branchidx))
+        rec = bytearray(pack(_rbcrecfmt, node, branchidx))
         if len(self._rbcrevs) < rbcrevidx + _rbcrecsize:
             self._rbcrevs.extend('\0' *
                                  (len(self._repo.changelog) * _rbcrecsize -

--- a/mercurial/bundlerepo.py	Sat Mar 11 20:58:26 2017 -0500
+++ b/mercurial/bundlerepo.py	Sun Mar 12 03:32:21 2017 -0400
@@ -209,7 +209,7 @@
             node = self.node(node)
 
         if node in self.fulltextcache:
-            result = self.fulltextcache[node].tostring()
+            result = '%s' % self.fulltextcache[node]
         else:
             result = manifest.manifestrevlog.revision(self, nodeorrev)
         return result

--- a/mercurial/manifest.py	Sat Mar 11 20:58:26 2017 -0500
+++ b/mercurial/manifest.py	Sun Mar 12 03:32:21 2017 -0400
@@ -7,7 +7,6 @@
 
 from __future__ import absolute_import
 
-import array
 import heapq
 import os
 import struct
@@ -628,8 +627,9 @@
         else:
             # For large changes, it's much cheaper to just build the text and
             # diff it.
-            arraytext = array.array('c', self.text())
-            deltatext = mdiff.textdiff(base, arraytext)
+            arraytext = bytearray(self.text())
+            deltatext = mdiff.textdiff(
+                util.buffer(base), util.buffer(arraytext))
 
         return arraytext, deltatext
 
@@ -687,12 +687,12 @@
     # for large addlist arrays, building a new array is cheaper
     # than repeatedly modifying the existing one
     currentposition = 0
-    newaddlist = array.array('c')
+    newaddlist = bytearray()
 
     for start, end, content in x:
         newaddlist += addlist[currentposition:start]
         if content:
-            newaddlist += array.array('c', content)
+            newaddlist += bytearray(content)
 
         currentposition = end
 
@@ -1240,7 +1240,7 @@
             else:
                 text = m.text(self._usemanifestv2)
                 n = self.addrevision(text, transaction, link, p1, p2)
-                arraytext = array.array('c', text)
+                arraytext = bytearray(text)
 
         if arraytext is not None:
             self.fulltextcache[n] = arraytext
@@ -1420,7 +1420,7 @@
             else:
                 rl = self._revlog()
                 text = rl.revision(self._node)
-                arraytext = array.array('c', text)
+                arraytext = bytearray(text)
                 rl._fulltextcache[self._node] = arraytext
                 self._data = manifestdict(text)
         return self._data
@@ -1529,7 +1529,7 @@
                 self._data = m
             else:
                 text = rl.revision(self._node)
-                arraytext = array.array('c', text)
+                arraytext = bytearray(text)
                 rl.fulltextcache[self._node] = arraytext
                 self._data = treemanifest(dir=self._dir, text=text)
 

--- a/mercurial/tags.py	Sat Mar 11 20:58:26 2017 -0500
+++ b/mercurial/tags.py	Sun Mar 12 03:32:21 2017 -0400
@@ -428,13 +428,12 @@
         self.lookupcount = 0
         self.hitcount = 0
 
-        self._raw = array('c')
 
         try:
             data = repo.vfs.read(_fnodescachefile)
         except (OSError, IOError):
             data = ""
-        self._raw.fromstring(data)
+        self._raw = bytearray(data)
 
         # The end state of self._raw is an array that is of the exact length
         # required to hold a record for every revision in the repository.
@@ -475,7 +474,7 @@
         self.lookupcount += 1
 
         offset = rev * _fnodesrecsize
-        record = self._raw[offset:offset + _fnodesrecsize].tostring()
+        record = '%s' % self._raw[offset:offset + _fnodesrecsize]
         properprefix = node[0:4]
 
         # Validate and return existing entry.
@@ -516,7 +515,7 @@
 
     def _writeentry(self, offset, prefix, fnode):
         # Slices on array instances only accept other array.
-        entry = array('c', prefix + fnode)
+        entry = bytearray(prefix + fnode)
         self._raw[offset:offset + _fnodesrecsize] = entry
         # self._dirtyoffset could be None.
         self._dirtyoffset = min(self._dirtyoffset, offset) or 0