From 620c6e8f1cd9c1e8bdb4166b69debf19cdcf274e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Marjam=C3=A4ki?= <daniel.marjamaki@gmail.com>
Date: Mon, 25 Jan 2016 13:41:27 +0100
Subject: [PATCH] reduce: improved removing of code blocks. loop until nothing
 is removed.

---
 tools/reduce.py | 118 ++++++++++++++++++++++++++++++++++++------------
 1 file changed, 89 insertions(+), 29 deletions(-)

diff --git a/tools/reduce.py b/tools/reduce.py
index c5c6c7578..b049add8d 100644
--- a/tools/reduce.py
+++ b/tools/reduce.py
@@ -84,6 +84,21 @@ def replaceandrun2(what, filedata, i, line1, line2):
     filedata[i] = bak1
     filedata[i+1] = bak2
 
+def clearandrun(what, filedata, i1, i2):
+  print(what + ' ' + str(i1+1) + '/' + str(len(filedata)) + '..')
+  filedata2 = list(filedata)
+  i = i1
+  while i <= i2 and i < len(filedata2):
+    filedata2[i] = ''
+    i = i + 1
+  writefile(FILE, filedata2)
+  if runtool() == True:
+    print('pass')
+    writefile(BACKUPFILE, filedata2)
+    return filedata2
+  print('fail')
+  return filedata
+
 def removecomments(filedata):
   for i in range(len(filedata)):
     line = filedata[i]
@@ -184,6 +199,43 @@ def removeemptyblocks(filedata):
     if checkpar(fd1) and fd1.endswith('{') and fd2 == '}':
       replaceandrun2('remove block', filedata, i, '', '')
 
+def removeblocks(filedata):
+  if len(filedata) < 3:
+    return filedata
+  
+  for i in range(len(filedata)):
+    strippedline = filedata[i].strip()
+    if len(strippedline)==0:
+      continue
+    if strippedline[-1] != '}' and strippedline[-1] != ';':
+      continue
+
+    i1 = i + 1
+    while i1 < len(filedata) and filedata[i1].startswith('#'):
+      i1 = i1 + 1
+
+    i2 = i1
+    indent = 0
+    while i2 < len(filedata):
+      for c in filedata[i2]:
+        if c == '}':
+          indent = indent - 1
+          if indent <= 0:
+            break
+        elif c == '{':
+          indent = indent + 1
+      i2 = i2 + 1
+    if i2 == i1 or i2 >= len(filedata):
+      continue
+    if filedata[i2].strip() != '}' and filedata[i2].strip() != '};':
+      continue
+    if indent < 0:
+      i2 = i2 - 1
+    filedata = clearandrun('remove codeblock', filedata, i1, i2)
+
+  return filedata
+
+
 def removenamespaces(filedata):
   if len(filedata) < 3:
     return filedata
@@ -208,26 +260,20 @@ def removenamespaces(filedata):
 
     if strippedline.find('}') < 0 and strippedline.find('{') == len(strippedline)-1:
       i2 = i + 1
-      level = 1
-      while i2 < len(filedata) and level > 0:
+      indent = 1
+      while i2 < len(filedata) and indent > 0:
         #print(str(i2)+':'+str(level)+':'+filedata[i2])
         for c in filedata[i2]:
           if c == '}':
-            level = level - 1
-            if level <= 0:
+            indent = indent - 1
+            if indent <= 0:
               break
           elif c == '{':
-            level = level + 1
+            indent = indent + 1
         i2 = i2 + 1
-      if level == 0 and (filedata[i2-1].strip().endswith('}') or filedata[i2-1].strip().endswith('};')):
+      if indent == 0 and (filedata[i2-1].strip().endswith('}') or filedata[i2-1].strip().endswith('};')):
         #print(str(i)+';'+str(i2))
-        filedata2 = list(filedata)
-        ii = i
-        while ii < i2:
-          filedata2[ii] = ''
-          ii = ii + 1
-        if replaceandrun('remove codeblock', filedata2, i, ''):
-          filedata = filedata2
+        filedata = clearandrun('remove codeblock', filedata, i, i2-1)
   return filedata
 
 # reduce..
@@ -242,23 +288,37 @@ f.close()
 
 writefile(BACKUPFILE, filedata)
 
-print('remove comments...')
-removecomments(filedata)
-print('combine lines..')
-combinelines(filedata)
-print('remove namespaces...')
-filedata = removenamespaces(filedata)
-print('remove includes...')
-removeincludes(filedata)
-print('remove line...')
-removeline(filedata)
-print('remove includes...')
-removeincludes(filedata)
-print('remove empty blocks...')
-removeemptyblocks(filedata)
-print('remove namespaces...')
-filedata = removenamespaces(filedata)
+while True:
+  filedata1 = list(filedata)
 
+  print('remove comments...')
+  removecomments(filedata)
 
+  print('remove includes...')
+  removeincludes(filedata)
+
+  print('remove empty blocks...')
+  removeemptyblocks(filedata)
+
+  print('remove blocks...')
+  filedata = removeblocks(filedata)
+
+  print('combine lines..')
+  combinelines(filedata)
+
+  print('remove namespaces...')
+  filedata = removenamespaces(filedata)
+
+  print('remove line...')
+  removeline(filedata)
+
+  # if filedata and filedata2 are identical then stop
+  if len(filedata1) == len(filedata):
+    i = 0
+    while i < len(filedata1):
+      if filedata[i] != filedata1[i]:
+        break
+    if i == len(filedata1):
+      break
 
 writefile(FILE, filedata)