Imported from /home/lorry/working-area/delta_boost-tarball/boost_1_54_0.tar.bz2.boost_1_54_0baserock/morph

1 files changed, 247 insertions, 0 deletions

diff --git a/libs/python/pyste/src/Pyste/CppParser.py b/libs/python/pyste/src/Pyste/CppParser.py
new file mode 100644
index 000000000..be68a448a
--- /dev/null
+++ b/libs/python/pyste/src/Pyste/CppParser.py
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+# Copyright Bruno da Silva de Oliveira 2003. Use, modification and 
+# distribution is subject to the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at 
+# http://www.boost.org/LICENSE_1_0.txt)
+
+from GCCXMLParser import ParseDeclarations
+import tempfile
+import shutil
+import os
+import sys
+import os.path
+import settings
+import shutil
+import shelve
+from cPickle import dump, load
+
+#==============================================================================
+# exceptions
+#==============================================================================
+class CppParserError(Exception): pass
+
+#==============================================================================
+# CppParser
+#==============================================================================
+class CppParser:
+    'Parses a header file and returns a list of declarations'
+    
+    def __init__(self, includes=None, defines=None, cache_dir=None, version=None, gccxml_path = 'gccxml'): 
+        'includes and defines ar the directives given to gcc'
+        if includes is None:
+            includes = []
+        if defines is None:
+            defines = []
+        self.includes = includes
+        self.gccxml_path = gccxml_path 
+        self.defines = defines
+        self.version = version
+        #if cache_dir is None:
+        #    cache_dir = tempfile.mktemp()
+        #    self.delete_cache = True
+        #else:
+        #    self.delete_cache = False
+        self.delete_cache = False
+        self.cache_dir = cache_dir
+        self.cache_files = []
+        self.mem_cache = {}
+        # create the cache dir
+        if cache_dir:
+            try:
+                os.makedirs(cache_dir)
+            except OSError: pass  
+
+
+    def __del__(self):
+        self.Close()
+
+        
+    def _IncludeParams(self, filename):
+        includes = self.includes[:]
+        filedir = os.path.dirname(filename)
+        if not filedir:
+            filedir = '.'
+        includes.insert(0, filedir)
+        includes = ['-I "%s"' % self.Unixfy(x) for x in includes]
+        return ' '.join(includes)
+
+
+    def _DefineParams(self):
+        defines = ['-D "%s"' % x for x in self.defines]
+        return ' '.join(defines)
+    
+    
+    def FindHeader(self, header):
+        if os.path.isfile(header):
+            return header
+        for path in self.includes:
+            filename = os.path.join(path, header)  
+            if os.path.isfile(filename):
+                return filename
+        else:
+            name = os.path.basename(header)
+            raise RuntimeError, 'Header file "%s" not found!' % name
+    
+            
+    def AppendTail(self, filename, tail):
+        '''Creates a temporary file, appends the text tail to it, and returns
+        the filename of the file.
+        '''
+        if hasattr(tempfile, 'mkstemp'):
+            f_no, temp = tempfile.mkstemp('.h')
+            f = file(temp, 'a')
+            os.close(f_no)
+        else:
+            temp = tempfile.mktemp('.h') 
+            f = file(temp, 'a')
+        f.write('#include "%s"\n\n' % os.path.abspath(filename))
+        f.write(tail)
+        f.write('\n')
+        f.close()   
+        return temp
+
+
+    def Unixfy(self, path):
+        return path.replace('\\', '/')
+
+
+    def ParseWithGCCXML(self, header, tail):
+        '''Parses the given header using gccxml and GCCXMLParser.
+        '''
+        header = self.FindHeader(header) 
+        if tail:
+            filename = self.AppendTail(header, tail)
+        else:
+            filename = header
+        xmlfile = tempfile.mktemp('.xml')
+        try:            
+            # get the params
+            includes = self._IncludeParams(filename)
+            defines = self._DefineParams()
+            # call gccxml
+            cmd = '%s %s %s "%s" -fxml=%s' 
+            filename = self.Unixfy(filename)
+            xmlfile = self.Unixfy(xmlfile)
+            status = os.system(cmd % (self.gccxml_path, includes, defines, filename, xmlfile))
+            if status != 0 or not os.path.isfile(xmlfile):
+                raise CppParserError, 'Error executing gccxml'
+            # parse the resulting xml
+            declarations = ParseDeclarations(xmlfile)
+            # make the declarations' location to point to the original file
+            if tail:
+                for decl in declarations:
+                    decl_filename = os.path.normpath(os.path.normcase(decl.location[0]))
+                    filename = os.path.normpath(os.path.normcase(filename))
+                    if decl_filename == filename:
+                        decl.location = header, decl.location[1]
+            # return the declarations                         
+            return declarations
+        finally:
+            if settings.DEBUG and os.path.isfile(xmlfile):
+                debugname = os.path.basename(header)
+                debugname = os.path.splitext(debugname)[0] + '.xml'
+                print 'DEBUG:', debugname
+                shutil.copy(xmlfile, debugname)
+            # delete the temporary files
+            try:
+                os.remove(xmlfile)
+                if tail:
+                    os.remove(filename)
+            except OSError: pass                
+
+            
+    def Parse(self, header, interface, tail=None):
+        '''Parses the given filename related to the given interface and returns
+        the (declarations, headerfile). The header returned is normally the
+        same as the given to this method (except that it is the full path),
+        except if tail is not None: in this case, the header is copied to a temp
+        filename and the tail code is appended to it before being passed on to
+        gccxml.  This temp filename is then returned.
+        '''        
+        if tail is None:
+            tail = ''
+        tail = tail.strip()
+        declarations = self.GetCache(header, interface, tail)
+        if declarations is None:
+            declarations = self.ParseWithGCCXML(header, tail)
+            self.CreateCache(header, interface, tail, declarations)
+        header_fullpath = os.path.abspath(self.FindHeader(header))
+        return declarations, header_fullpath
+
+
+    def CacheFileName(self, interface):
+        interface_name = os.path.basename(interface)
+        cache_file = os.path.splitext(interface_name)[0] + '.pystec'
+        cache_file = os.path.join(self.cache_dir, cache_file) 
+        return cache_file
+        
+
+    def GetCache(self, header, interface, tail):
+        key = (header, interface, tail)
+        # try memory cache first
+        if key in self.mem_cache:
+            return self.mem_cache[key]
+        
+        # get the cache from the disk
+        if self.cache_dir is None:
+            return None 
+        header = self.FindHeader(header) 
+        cache_file = self.CacheFileName(interface)    
+        if os.path.isfile(cache_file):
+            f = file(cache_file, 'rb')
+            try:
+                version = load(f)
+                if version != self.version:
+                    return None
+                cache = load(f)
+                if cache.has_key(key):
+                    self.cache_files.append(cache_file)
+                    return cache[key]
+                else:
+                    return None
+            finally:
+                f.close()
+        else:
+            return None
+
+
+    def CreateCache(self, header, interface, tail, declarations):
+        key = (header, interface, tail)
+        
+        # our memory cache only holds one item
+        self.mem_cache.clear() 
+        self.mem_cache[key] = declarations
+
+        # save the cache in the disk
+        if self.cache_dir is None:
+            return
+        header = self.FindHeader(header) 
+        cache_file = self.CacheFileName(interface)
+        if os.path.isfile(cache_file):
+            f = file(cache_file, 'rb')
+            try:
+                version = load(f)
+                cache = load(f)
+            finally:
+                f.close()
+        else:
+            cache = {}
+        cache[key] = declarations
+        self.cache_files.append(cache_file)
+        f = file(cache_file, 'wb')
+        try:
+            dump(self.version, f, 1)
+            dump(cache, f, 1)
+        finally:
+            f.close()
+        return cache_file 
+
+
+    def Close(self):
+        if self.delete_cache and self.cache_files:
+            for filename in self.cache_files:
+                try:
+                    os.remove(filename)
+                except OSError: 
+                    pass
+            self.cache_files = []
+            shutil.rmtree(self.cache_dir)