third_party/libevent/event_rpcgen.py - Issue 1531573008: move libevent into base

Unified Diff: third_party/libevent/event_rpcgen.py

Issue 1531573008: move libevent into base (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: fix shim path Created 5 years ago

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Index: third_party/libevent/event_rpcgen.py

diff --git a/third_party/libevent/event_rpcgen.py b/third_party/libevent/event_rpcgen.py

deleted file mode 100755

index 4ec77a6f6e315c7f03954a114bc6ab76a2cab6ad..0000000000000000000000000000000000000000

--- a/third_party/libevent/event_rpcgen.py

+++ /dev/null

@@ -1,1423 +0,0 @@

-#!/usr/bin/env python

-# Generates marshaling code based on libevent.

-import sys

-import re

-_NAME = "event_rpcgen.py"

-_VERSION = "0.1"

-_STRUCT_RE = '[a-z][a-z_0-9]*'

-# Globals

-line_count = 0

-white = re.compile(r'^\s+')

-cppcomment = re.compile(r'\/\/.*$')

-headerdirect = []

-cppdirect = []

-# Holds everything that makes a struct

-class Struct:

- def __init__(self, name):

- self._name = name

- self._entries = []

- self._tags = {}

- print >>sys.stderr, ' Created struct: %s' % name

- def AddEntry(self, entry):

- if self._tags.has_key(entry.Tag()):

- print >>sys.stderr, ( 'Entry "%s" duplicates tag number '

- '%d from "%s" around line %d' ) % (

- entry.Name(), entry.Tag(),

- self._tags[entry.Tag()], line_count)

- sys.exit(1)

- self._entries.append(entry)

- self._tags[entry.Tag()] = entry.Name()

- print >>sys.stderr, ' Added entry: %s' % entry.Name()

- def Name(self):

- return self._name

- def EntryTagName(self, entry):

- """Creates the name inside an enumeration for distinguishing data

- types."""

- name = "%s_%s" % (self._name, entry.Name())

- return name.upper()

- def PrintIdented(self, file, ident, code):

- """Takes an array, add indentation to each entry and prints it."""

- for entry in code:

- print >>file, '%s%s' % (ident, entry)

- def PrintTags(self, file):

- """Prints the tag definitions for a structure."""

- print >>file, '/* Tag definition for %s */' % self._name

- print >>file, 'enum %s_ {' % self._name.lower()

- for entry in self._entries:

- print >>file, ' %s=%d,' % (self.EntryTagName(entry),

- entry.Tag())

- print >>file, ' %s_MAX_TAGS' % (self._name.upper())

- print >>file, '};\n'

- def PrintForwardDeclaration(self, file):

- print >>file, 'struct %s;' % self._name

- def PrintDeclaration(self, file):

- print >>file, '/* Structure declaration for %s */' % self._name

- print >>file, 'struct %s_access_ {' % self._name

- for entry in self._entries:

- dcl = entry.AssignDeclaration('(*%s_assign)' % entry.Name())

- dcl.extend(

- entry.GetDeclaration('(*%s_get)' % entry.Name()))

- if entry.Array():

- dcl.extend(

- entry.AddDeclaration('(*%s_add)' % entry.Name()))

- self.PrintIdented(file, ' ', dcl)

- print >>file, '};\n'

- print >>file, 'struct %s {' % self._name

- print >>file, ' struct %s_access_ *base;\n' % self._name

- for entry in self._entries:

- dcl = entry.Declaration()

- self.PrintIdented(file, ' ', dcl)

- print >>file, ''

- for entry in self._entries:

- print >>file, ' ev_uint8_t %s_set;' % entry.Name()

- print >>file, '};\n'

- print >>file, \

-"""struct %(name)s *%(name)s_new(void);

-void %(name)s_free(struct %(name)s *);

-void %(name)s_clear(struct %(name)s *);

-void %(name)s_marshal(struct evbuffer *, const struct %(name)s *);

-int %(name)s_unmarshal(struct %(name)s *, struct evbuffer *);

-int %(name)s_complete(struct %(name)s *);

-void evtag_marshal_%(name)s(struct evbuffer *, ev_uint32_t,

- const struct %(name)s *);

-int evtag_unmarshal_%(name)s(struct evbuffer *, ev_uint32_t,

- struct %(name)s *);""" % { 'name' : self._name }

- # Write a setting function of every variable

- for entry in self._entries:

- self.PrintIdented(file, '', entry.AssignDeclaration(

- entry.AssignFuncName()))

- self.PrintIdented(file, '', entry.GetDeclaration(

- entry.GetFuncName()))

- if entry.Array():

- self.PrintIdented(file, '', entry.AddDeclaration(

- entry.AddFuncName()))

- print >>file, '/* --- %s done --- */\n' % self._name

- def PrintCode(self, file):

- print >>file, ('/*\n'

- ' * Implementation of %s\n'

- ' */\n') % self._name

- print >>file, \

- 'static struct %(name)s_access_ __%(name)s_base = {' % \

- { 'name' : self._name }

- for entry in self._entries:

- self.PrintIdented(file, ' ', entry.CodeBase())

- print >>file, '};\n'

- # Creation

- print >>file, (

- 'struct %(name)s *\n'

- '%(name)s_new(void)\n'

- '{\n'

- ' struct %(name)s *tmp;\n'

- ' if ((tmp = malloc(sizeof(struct %(name)s))) == NULL) {\n'

- ' event_warn("%%s: malloc", __func__);\n'

- ' return (NULL);\n'

- ' }\n'

- ' tmp->base = &__%(name)s_base;\n') % { 'name' : self._name }

- for entry in self._entries:

- self.PrintIdented(file, ' ', entry.CodeNew('tmp'))

- print >>file, ' tmp->%s_set = 0;\n' % entry.Name()

- print >>file, (

- ' return (tmp);\n'

- '}\n')

- # Adding

- for entry in self._entries:

- if entry.Array():

- self.PrintIdented(file, '', entry.CodeAdd())

- print >>file, ''

- # Assigning

- for entry in self._entries:

- self.PrintIdented(file, '', entry.CodeAssign())

- print >>file, ''

- # Getting

- for entry in self._entries:

- self.PrintIdented(file, '', entry.CodeGet())

- print >>file, ''

- # Clearing

- print >>file, ( 'void\n'

- '%(name)s_clear(struct %(name)s *tmp)\n'

- '{'

- ) % { 'name' : self._name }

- for entry in self._entries:

- self.PrintIdented(file, ' ', entry.CodeClear('tmp'))

- print >>file, '}\n'

- # Freeing

- print >>file, ( 'void\n'

- '%(name)s_free(struct %(name)s *tmp)\n'

- '{'

- ) % { 'name' : self._name }

- for entry in self._entries:

- self.PrintIdented(file, ' ', entry.CodeFree('tmp'))

- print >>file, (' free(tmp);\n'

- '}\n')

- # Marshaling

- print >>file, ('void\n'

- '%(name)s_marshal(struct evbuffer *evbuf, '

- 'const struct %(name)s *tmp)'

- '{') % { 'name' : self._name }

- for entry in self._entries:

- indent = ' '

- # Optional entries do not have to be set

- if entry.Optional():

- indent += ' '

- print >>file, ' if (tmp->%s_set) {' % entry.Name()

- self.PrintIdented(

- file, indent,

- entry.CodeMarshal('evbuf', self.EntryTagName(entry), 'tmp'))

- if entry.Optional():

- print >>file, ' }'

- print >>file, '}\n'

- # Unmarshaling

- print >>file, ('int\n'

- '%(name)s_unmarshal(struct %(name)s *tmp, '

- ' struct evbuffer *evbuf)\n'

- '{\n'

- ' ev_uint32_t tag;\n'

- ' while (EVBUFFER_LENGTH(evbuf) > 0) {\n'

- ' if (evtag_peek(evbuf, &tag) == -1)\n'

- ' return (-1);\n'

- ' switch (tag) {\n'

- ) % { 'name' : self._name }

- for entry in self._entries:

- print >>file, ' case %s:\n' % self.EntryTagName(entry)

- if not entry.Array():

- print >>file, (

- ' if (tmp->%s_set)\n'

- ' return (-1);'

- ) % (entry.Name())

- self.PrintIdented(

- file, ' ',

- entry.CodeUnmarshal('evbuf',

- self.EntryTagName(entry), 'tmp'))

- print >>file, ( ' tmp->%s_set = 1;\n' % entry.Name() +

- ' break;\n' )

- print >>file, ( ' default:\n'

- ' return -1;\n'

- ' }\n'

- ' }\n' )

- # Check if it was decoded completely

- print >>file, ( ' if (%(name)s_complete(tmp) == -1)\n'

- ' return (-1);'

- ) % { 'name' : self._name }

- # Successfully decoded

- print >>file, ( ' return (0);\n'

- '}\n')

- # Checking if a structure has all the required data

- print >>file, (

- 'int\n'

- '%(name)s_complete(struct %(name)s *msg)\n'

- '{' ) % { 'name' : self._name }

- for entry in self._entries:

- self.PrintIdented(

- file, ' ',

- entry.CodeComplete('msg'))

- print >>file, (

- ' return (0);\n'

- '}\n' )

- # Complete message unmarshaling

- print >>file, (

- 'int\n'

- 'evtag_unmarshal_%(name)s(struct evbuffer *evbuf, '

- 'ev_uint32_t need_tag, struct %(name)s *msg)\n'

- '{\n'

- ' ev_uint32_t tag;\n'

- ' int res = -1;\n'

- '\n'

- ' struct evbuffer *tmp = evbuffer_new();\n'

- '\n'

- ' if (evtag_unmarshal(evbuf, &tag, tmp) == -1'

- ' || tag != need_tag)\n'

- ' goto error;\n'

- '\n'

- ' if (%(name)s_unmarshal(msg, tmp) == -1)\n'

- ' goto error;\n'

- '\n'

- ' res = 0;\n'

- '\n'

- ' error:\n'

- ' evbuffer_free(tmp);\n'

- ' return (res);\n'

- '}\n' ) % { 'name' : self._name }

- # Complete message marshaling

- print >>file, (

- 'void\n'

- 'evtag_marshal_%(name)s(struct evbuffer *evbuf, ev_uint32_t tag, '

- 'const struct %(name)s *msg)\n'

- '{\n'

- ' struct evbuffer *_buf = evbuffer_new();\n'

- ' assert(_buf != NULL);\n'

- ' evbuffer_drain(_buf, -1);\n'

- ' %(name)s_marshal(_buf, msg);\n'

- ' evtag_marshal(evbuf, tag, EVBUFFER_DATA(_buf), '

- 'EVBUFFER_LENGTH(_buf));\n'

- ' evbuffer_free(_buf);\n'

- '}\n' ) % { 'name' : self._name }

-class Entry:

- def __init__(self, type, name, tag):

- self._type = type

- self._name = name

- self._tag = int(tag)

- self._ctype = type

- self._optional = 0

- self._can_be_array = 0

- self._array = 0

- self._line_count = -1

- self._struct = None

- self._refname = None

- def GetTranslation(self):

- return { "parent_name" : self._struct.Name(),

- "name" : self._name,

- "ctype" : self._ctype,

- "refname" : self._refname

- }

- def SetStruct(self, struct):

- self._struct = struct

- def LineCount(self):

- assert self._line_count != -1

- return self._line_count

- def SetLineCount(self, number):

- self._line_count = number

- def Array(self):

- return self._array

- def Optional(self):

- return self._optional

- def Tag(self):

- return self._tag

- def Name(self):

- return self._name

- def Type(self):

- return self._type

- def MakeArray(self, yes=1):

- self._array = yes

- def MakeOptional(self):

- self._optional = 1

- def GetFuncName(self):

- return '%s_%s_get' % (self._struct.Name(), self._name)

- def GetDeclaration(self, funcname):

- code = [ 'int %s(struct %s *, %s *);' % (

- funcname, self._struct.Name(), self._ctype ) ]

- return code

- def CodeGet(self):

- code = (

- 'int',

- '%(parent_name)s_%(name)s_get(struct %(parent_name)s *msg, '

- '%(ctype)s *value)',

- '{',

- ' if (msg->%(name)s_set != 1)',

- ' return (-1);',

- ' *value = msg->%(name)s_data;',

- ' return (0);',

- '}' )

- code = '\n'.join(code)

- code = code % self.GetTranslation()

- return code.split('\n')

- def AssignFuncName(self):

- return '%s_%s_assign' % (self._struct.Name(), self._name)

- def AddFuncName(self):

- return '%s_%s_add' % (self._struct.Name(), self._name)

- def AssignDeclaration(self, funcname):

- code = [ 'int %s(struct %s *, const %s);' % (

- funcname, self._struct.Name(), self._ctype ) ]

- return code

- def CodeAssign(self):

- code = [ 'int',

- '%(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg,'

- ' const %(ctype)s value)',

- '{',

- ' msg->%(name)s_set = 1;',

- ' msg->%(name)s_data = value;',

- ' return (0);',

- '}' ]

- code = '\n'.join(code)

- code = code % self.GetTranslation()

- return code.split('\n')

- def CodeClear(self, structname):

- code = [ '%s->%s_set = 0;' % (structname, self.Name()) ]

- return code

- def CodeComplete(self, structname):

- if self.Optional():

- return []

- code = [ 'if (!%s->%s_set)' % (structname, self.Name()),

- ' return (-1);' ]

- return code

- def CodeFree(self, name):

- return []

- def CodeBase(self):

- code = [

- '%(parent_name)s_%(name)s_assign,',

- '%(parent_name)s_%(name)s_get,'

- ]

- if self.Array():

- code.append('%(parent_name)s_%(name)s_add,')

- code = '\n'.join(code)

- code = code % self.GetTranslation()

- return code.split('\n')

- def Verify(self):

- if self.Array() and not self._can_be_array:

- print >>sys.stderr, (

- 'Entry "%s" cannot be created as an array '

- 'around line %d' ) % (self._name, self.LineCount())

- sys.exit(1)

- if not self._struct:

- print >>sys.stderr, (

- 'Entry "%s" does not know which struct it belongs to '

- 'around line %d' ) % (self._name, self.LineCount())

- sys.exit(1)

- if self._optional and self._array:

- print >>sys.stderr, ( 'Entry "%s" has illegal combination of '

- 'optional and array around line %d' ) % (

- self._name, self.LineCount() )

- sys.exit(1)

-class EntryBytes(Entry):

- def __init__(self, type, name, tag, length):

- # Init base class

- Entry.__init__(self, type, name, tag)

- self._length = length

- self._ctype = 'ev_uint8_t'

- def GetDeclaration(self, funcname):

- code = [ 'int %s(struct %s *, %s **);' % (

- funcname, self._struct.Name(), self._ctype ) ]

- return code

- def AssignDeclaration(self, funcname):

- code = [ 'int %s(struct %s *, const %s *);' % (

- funcname, self._struct.Name(), self._ctype ) ]

- return code

- def Declaration(self):

- dcl = ['ev_uint8_t %s_data[%s];' % (self._name, self._length)]

- return dcl

- def CodeGet(self):

- name = self._name

- code = [ 'int',

- '%s_%s_get(struct %s *msg, %s **value)' % (

- self._struct.Name(), name,

- self._struct.Name(), self._ctype),

- '{',

- ' if (msg->%s_set != 1)' % name,

- ' return (-1);',

- ' *value = msg->%s_data;' % name,

- ' return (0);',

- '}' ]

- return code

- def CodeAssign(self):

- name = self._name

- code = [ 'int',

- '%s_%s_assign(struct %s *msg, const %s *value)' % (

- self._struct.Name(), name,

- self._struct.Name(), self._ctype),

- '{',

- ' msg->%s_set = 1;' % name,

- ' memcpy(msg->%s_data, value, %s);' % (

- name, self._length),

- ' return (0);',

- '}' ]

- return code

- def CodeUnmarshal(self, buf, tag_name, var_name):

- code = [ 'if (evtag_unmarshal_fixed(%s, %s, ' % (buf, tag_name) +

- '%s->%s_data, ' % (var_name, self._name) +

- 'sizeof(%s->%s_data)) == -1) {' % (

- var_name, self._name),

- ' event_warnx("%%s: failed to unmarshal %s", __func__);' % (

- self._name ),

- ' return (-1);',

- '}'

- ]

- return code

- def CodeMarshal(self, buf, tag_name, var_name):

- code = ['evtag_marshal(%s, %s, %s->%s_data, sizeof(%s->%s_data));' % (

- buf, tag_name, var_name, self._name, var_name, self._name )]

- return code

- def CodeClear(self, structname):

- code = [ '%s->%s_set = 0;' % (structname, self.Name()),

- 'memset(%s->%s_data, 0, sizeof(%s->%s_data));' % (

- structname, self._name, structname, self._name)]

- return code

- def CodeNew(self, name):

- code = ['memset(%s->%s_data, 0, sizeof(%s->%s_data));' % (

- name, self._name, name, self._name)]

- return code

- def Verify(self):

- if not self._length:

- print >>sys.stderr, 'Entry "%s" needs a length around line %d' % (

- self._name, self.LineCount() )

- sys.exit(1)

- Entry.Verify(self)

-class EntryInt(Entry):

- def __init__(self, type, name, tag):

- # Init base class

- Entry.__init__(self, type, name, tag)

- self._ctype = 'ev_uint32_t'

- def CodeUnmarshal(self, buf, tag_name, var_name):

- code = ['if (evtag_unmarshal_int(%s, %s, &%s->%s_data) == -1) {' % (

- buf, tag_name, var_name, self._name),

- ' event_warnx("%%s: failed to unmarshal %s", __func__);' % (

- self._name ),

- ' return (-1);',

- '}' ]

- return code

- def CodeMarshal(self, buf, tag_name, var_name):

- code = ['evtag_marshal_int(%s, %s, %s->%s_data);' % (

- buf, tag_name, var_name, self._name)]

- return code

- def Declaration(self):

- dcl = ['ev_uint32_t %s_data;' % self._name]

- return dcl

- def CodeNew(self, name):

- code = ['%s->%s_data = 0;' % (name, self._name)]

- return code

-class EntryString(Entry):

- def __init__(self, type, name, tag):

- # Init base class

- Entry.__init__(self, type, name, tag)

- self._ctype = 'char *'

- def CodeAssign(self):

- name = self._name

- code = """int

-%(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg,

- const %(ctype)s value)

- if (msg->%(name)s_data != NULL)

- free(msg->%(name)s_data);

- if ((msg->%(name)s_data = strdup(value)) == NULL)

- return (-1);

- msg->%(name)s_set = 1;

- return (0);

-}""" % self.GetTranslation()

- return code.split('\n')

- def CodeUnmarshal(self, buf, tag_name, var_name):

- code = ['if (evtag_unmarshal_string(%s, %s, &%s->%s_data) == -1) {' % (

- buf, tag_name, var_name, self._name),

- ' event_warnx("%%s: failed to unmarshal %s", __func__);' % (

- self._name ),

- ' return (-1);',

- '}'

- ]

- return code

- def CodeMarshal(self, buf, tag_name, var_name):

- code = ['evtag_marshal_string(%s, %s, %s->%s_data);' % (

- buf, tag_name, var_name, self._name)]

- return code

- def CodeClear(self, structname):

- code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),

- ' free (%s->%s_data);' % (structname, self.Name()),

- ' %s->%s_data = NULL;' % (structname, self.Name()),

- ' %s->%s_set = 0;' % (structname, self.Name()),

- '}'

- ]

- return code

- def CodeNew(self, name):

- code = ['%s->%s_data = NULL;' % (name, self._name)]

- return code

- def CodeFree(self, name):

- code = ['if (%s->%s_data != NULL)' % (name, self._name),

- ' free (%s->%s_data); ' % (name, self._name)]

- return code

- def Declaration(self):

- dcl = ['char *%s_data;' % self._name]

- return dcl

-class EntryStruct(Entry):

- def __init__(self, type, name, tag, refname):

- # Init base class

- Entry.__init__(self, type, name, tag)

- self._can_be_array = 1

- self._refname = refname

- self._ctype = 'struct %s*' % refname

- def CodeGet(self):

- name = self._name

- code = [ 'int',

- '%s_%s_get(struct %s *msg, %s *value)' % (

- self._struct.Name(), name,

- self._struct.Name(), self._ctype),

- '{',

- ' if (msg->%s_set != 1) {' % name,

- ' msg->%s_data = %s_new();' % (name, self._refname),

- ' if (msg->%s_data == NULL)' % name,

- ' return (-1);',

- ' msg->%s_set = 1;' % name,

- ' }',

- ' *value = msg->%s_data;' % name,

- ' return (0);',

- '}' ]

- return code

- def CodeAssign(self):

- name = self._name

- code = """int

-%(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg,

- const %(ctype)s value)

- struct evbuffer *tmp = NULL;

- if (msg->%(name)s_set) {

- %(refname)s_clear(msg->%(name)s_data);

- msg->%(name)s_set = 0;

- } else {

- msg->%(name)s_data = %(refname)s_new();

- if (msg->%(name)s_data == NULL) {

- event_warn("%%s: %(refname)s_new()", __func__);

- goto error;

- }

- if ((tmp = evbuffer_new()) == NULL) {

- event_warn("%%s: evbuffer_new()", __func__);

- goto error;

- }

- %(refname)s_marshal(tmp, value);

- if (%(refname)s_unmarshal(msg->%(name)s_data, tmp) == -1) {

- event_warnx("%%s: %(refname)s_unmarshal", __func__);

- goto error;

- }

- msg->%(name)s_set = 1;

- evbuffer_free(tmp);

- return (0);

- error:

- if (tmp != NULL)

- evbuffer_free(tmp);

- if (msg->%(name)s_data != NULL) {

- %(refname)s_free(msg->%(name)s_data);

- msg->%(name)s_data = NULL;

- }

- return (-1);

-}""" % self.GetTranslation()

- return code.split('\n')

- def CodeComplete(self, structname):

- if self.Optional():

- code = [ 'if (%s->%s_set && %s_complete(%s->%s_data) == -1)' % (

- structname, self.Name(),

- self._refname, structname, self.Name()),

- ' return (-1);' ]

- else:

- code = [ 'if (%s_complete(%s->%s_data) == -1)' % (

- self._refname, structname, self.Name()),

- ' return (-1);' ]

- return code

- def CodeUnmarshal(self, buf, tag_name, var_name):

- code = ['%s->%s_data = %s_new();' % (

- var_name, self._name, self._refname),

- 'if (%s->%s_data == NULL)' % (var_name, self._name),

- ' return (-1);',

- 'if (evtag_unmarshal_%s(%s, %s, %s->%s_data) == -1) {' % (

- self._refname, buf, tag_name, var_name, self._name),

- ' event_warnx("%%s: failed to unmarshal %s", __func__);' % (

- self._name ),

- ' return (-1);',

- '}'

- ]

- return code

- def CodeMarshal(self, buf, tag_name, var_name):

- code = ['evtag_marshal_%s(%s, %s, %s->%s_data);' % (

- self._refname, buf, tag_name, var_name, self._name)]

- return code

- def CodeClear(self, structname):

- code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),

- ' %s_free(%s->%s_data);' % (

- self._refname, structname, self.Name()),

- ' %s->%s_data = NULL;' % (structname, self.Name()),

- ' %s->%s_set = 0;' % (structname, self.Name()),

- '}'

- ]

- return code

- def CodeNew(self, name):

- code = ['%s->%s_data = NULL;' % (name, self._name)]

- return code

- def CodeFree(self, name):

- code = ['if (%s->%s_data != NULL)' % (name, self._name),

- ' %s_free(%s->%s_data); ' % (

- self._refname, name, self._name)]

- return code

- def Declaration(self):

- dcl = ['%s %s_data;' % (self._ctype, self._name)]

- return dcl

-class EntryVarBytes(Entry):

- def __init__(self, type, name, tag):

- # Init base class

- Entry.__init__(self, type, name, tag)

- self._ctype = 'ev_uint8_t *'

- def GetDeclaration(self, funcname):

- code = [ 'int %s(struct %s *, %s *, ev_uint32_t *);' % (

- funcname, self._struct.Name(), self._ctype ) ]

- return code

- def AssignDeclaration(self, funcname):

- code = [ 'int %s(struct %s *, const %s, ev_uint32_t);' % (

- funcname, self._struct.Name(), self._ctype ) ]

- return code

- def CodeAssign(self):

- name = self._name

- code = [ 'int',

- '%s_%s_assign(struct %s *msg, '

- 'const %s value, ev_uint32_t len)' % (

- self._struct.Name(), name,

- self._struct.Name(), self._ctype),

- '{',

- ' if (msg->%s_data != NULL)' % name,

- ' free (msg->%s_data);' % name,

- ' msg->%s_data = malloc(len);' % name,

- ' if (msg->%s_data == NULL)' % name,

- ' return (-1);',

- ' msg->%s_set = 1;' % name,

- ' msg->%s_length = len;' % name,

- ' memcpy(msg->%s_data, value, len);' % name,

- ' return (0);',

- '}' ]

- return code

- def CodeGet(self):

- name = self._name

- code = [ 'int',

- '%s_%s_get(struct %s *msg, %s *value, ev_uint32_t *plen)' % (

- self._struct.Name(), name,

- self._struct.Name(), self._ctype),

- '{',

- ' if (msg->%s_set != 1)' % name,

- ' return (-1);',

- ' *value = msg->%s_data;' % name,

- ' *plen = msg->%s_length;' % name,

- ' return (0);',

- '}' ]

- return code

- def CodeUnmarshal(self, buf, tag_name, var_name):

- code = ['if (evtag_payload_length(%s, &%s->%s_length) == -1)' % (

- buf, var_name, self._name),

- ' return (-1);',

- # We do not want DoS opportunities

- 'if (%s->%s_length > EVBUFFER_LENGTH(%s))' % (

- var_name, self._name, buf),

- ' return (-1);',

- 'if ((%s->%s_data = malloc(%s->%s_length)) == NULL)' % (

- var_name, self._name, var_name, self._name),

- ' return (-1);',

- 'if (evtag_unmarshal_fixed(%s, %s, %s->%s_data, '

- '%s->%s_length) == -1) {' % (

- buf, tag_name, var_name, self._name, var_name, self._name),

- ' event_warnx("%%s: failed to unmarshal %s", __func__);' % (

- self._name ),

- ' return (-1);',

- '}'

- ]

- return code

- def CodeMarshal(self, buf, tag_name, var_name):

- code = ['evtag_marshal(%s, %s, %s->%s_data, %s->%s_length);' % (

- buf, tag_name, var_name, self._name, var_name, self._name)]

- return code

- def CodeClear(self, structname):

- code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),

- ' free (%s->%s_data);' % (structname, self.Name()),

- ' %s->%s_data = NULL;' % (structname, self.Name()),

- ' %s->%s_length = 0;' % (structname, self.Name()),

- ' %s->%s_set = 0;' % (structname, self.Name()),

- '}'

- ]

- return code

- def CodeNew(self, name):

- code = ['%s->%s_data = NULL;' % (name, self._name),

- '%s->%s_length = 0;' % (name, self._name) ]

- return code

- def CodeFree(self, name):

- code = ['if (%s->%s_data != NULL)' % (name, self._name),

- ' free (%s->%s_data); ' % (name, self._name)]

- return code

- def Declaration(self):

- dcl = ['ev_uint8_t *%s_data;' % self._name,

- 'ev_uint32_t %s_length;' % self._name]

- return dcl

-class EntryArray(Entry):

- def __init__(self, entry):

- # Init base class

- Entry.__init__(self, entry._type, entry._name, entry._tag)

- self._entry = entry

- self._refname = entry._refname

- self._ctype = 'struct %s *' % self._refname

- def GetDeclaration(self, funcname):

- """Allows direct access to elements of the array."""

- translate = self.GetTranslation()

- translate["funcname"] = funcname

- code = [

- 'int %(funcname)s(struct %(parent_name)s *, int, %(ctype)s *);' %

- translate ]

- return code

- def AssignDeclaration(self, funcname):

- code = [ 'int %s(struct %s *, int, const %s);' % (

- funcname, self._struct.Name(), self._ctype ) ]

- return code

- def AddDeclaration(self, funcname):

- code = [ '%s %s(struct %s *);' % (

- self._ctype, funcname, self._struct.Name() ) ]

- return code

- def CodeGet(self):

- code = """int

-%(parent_name)s_%(name)s_get(struct %(parent_name)s *msg, int offset,

- %(ctype)s *value)

- if (!msg->%(name)s_set || offset < 0 || offset >= msg->%(name)s_length)

- return (-1);

- *value = msg->%(name)s_data[offset];

- return (0);

-}""" % self.GetTranslation()

- return code.split('\n')

- def CodeAssign(self):

- code = """int

-%(parent_name)s_%(name)s_assign(struct %(parent_name)s *msg, int off,

- const %(ctype)s value)

- struct evbuffer *tmp = NULL;

- if (!msg->%(name)s_set || off < 0 || off >= msg->%(name)s_length)

- return (-1);

- %(refname)s_clear(msg->%(name)s_data[off]);

- if ((tmp = evbuffer_new()) == NULL) {

- event_warn("%%s: evbuffer_new()", __func__);

- goto error;

- }

- %(refname)s_marshal(tmp, value);

- if (%(refname)s_unmarshal(msg->%(name)s_data[off], tmp) == -1) {

- event_warnx("%%s: %(refname)s_unmarshal", __func__);

- goto error;

- }

- evbuffer_free(tmp);

- return (0);

-error:

- if (tmp != NULL)

- evbuffer_free(tmp);

- %(refname)s_clear(msg->%(name)s_data[off]);

- return (-1);

-}""" % self.GetTranslation()

- return code.split('\n')

- def CodeAdd(self):

- code = \

-"""%(ctype)s

-%(parent_name)s_%(name)s_add(struct %(parent_name)s *msg)

- if (++msg->%(name)s_length >= msg->%(name)s_num_allocated) {

- int tobe_allocated = msg->%(name)s_num_allocated;

- %(ctype)s* new_data = NULL;

- tobe_allocated = !tobe_allocated ? 1 : tobe_allocated << 1;

- new_data = (%(ctype)s*) realloc(msg->%(name)s_data,

- tobe_allocated * sizeof(%(ctype)s));

- if (new_data == NULL)

- goto error;

- msg->%(name)s_data = new_data;

- msg->%(name)s_num_allocated = tobe_allocated;

- }

- msg->%(name)s_data[msg->%(name)s_length - 1] = %(refname)s_new();

- if (msg->%(name)s_data[msg->%(name)s_length - 1] == NULL)

- goto error;

- msg->%(name)s_set = 1;

- return (msg->%(name)s_data[msg->%(name)s_length - 1]);

-error:

- --msg->%(name)s_length;

- return (NULL);

- """ % self.GetTranslation()

- return code.split('\n')

- def CodeComplete(self, structname):

- code = []

- translate = self.GetTranslation()

- if self.Optional():

- code.append( 'if (%(structname)s->%(name)s_set)' % translate)

- translate["structname"] = structname

- tmp = """{

- int i;

- for (i = 0; i < %(structname)s->%(name)s_length; ++i) {

- if (%(refname)s_complete(%(structname)s->%(name)s_data[i]) == -1)

- return (-1);

- }

-}""" % translate

- code.extend(tmp.split('\n'))

- return code

- def CodeUnmarshal(self, buf, tag_name, var_name):

- translate = self.GetTranslation()

- translate["var_name"] = var_name

- translate["buf"] = buf

- translate["tag_name"] = tag_name

- code = """if (%(parent_name)s_%(name)s_add(%(var_name)s) == NULL)

- return (-1);

-if (evtag_unmarshal_%(refname)s(%(buf)s, %(tag_name)s,

- %(var_name)s->%(name)s_data[%(var_name)s->%(name)s_length - 1]) == -1) {

- --%(var_name)s->%(name)s_length;

- event_warnx("%%s: failed to unmarshal %(name)s", __func__);

- return (-1);

-}""" % translate

- return code.split('\n')

- def CodeMarshal(self, buf, tag_name, var_name):

- code = ['{',

- ' int i;',

- ' for (i = 0; i < %s->%s_length; ++i) {' % (

- var_name, self._name),

- ' evtag_marshal_%s(%s, %s, %s->%s_data[i]);' % (

- self._refname, buf, tag_name, var_name, self._name),

- ' }',

- '}'

- ]

- return code

- def CodeClear(self, structname):

- code = [ 'if (%s->%s_set == 1) {' % (structname, self.Name()),

- ' int i;',

- ' for (i = 0; i < %s->%s_length; ++i) {' % (

- structname, self.Name()),

- ' %s_free(%s->%s_data[i]);' % (

- self._refname, structname, self.Name()),

- ' }',

- ' free(%s->%s_data);' % (structname, self.Name()),

- ' %s->%s_data = NULL;' % (structname, self.Name()),

- ' %s->%s_set = 0;' % (structname, self.Name()),

- ' %s->%s_length = 0;' % (structname, self.Name()),

- ' %s->%s_num_allocated = 0;' % (structname, self.Name()),

- '}'

- ]

- return code

- def CodeNew(self, name):

- code = ['%s->%s_data = NULL;' % (name, self._name),

- '%s->%s_length = 0;' % (name, self._name),

- '%s->%s_num_allocated = 0;' % (name, self._name)]

- return code

- def CodeFree(self, name):

- code = ['if (%s->%s_data != NULL) {' % (name, self._name),

- ' int i;',

- ' for (i = 0; i < %s->%s_length; ++i) {' % (

- name, self._name),

- ' %s_free(%s->%s_data[i]); ' % (

- self._refname, name, self._name),

- ' %s->%s_data[i] = NULL;' % (name, self._name),

- ' }',

- ' free(%s->%s_data);' % (name, self._name),

- ' %s->%s_data = NULL;' % (name, self._name),

- ' %s->%s_length = 0;' % (name, self._name),

- ' %s->%s_num_allocated = 0;' % (name, self._name),

- '}'

- ]

- return code

- def Declaration(self):

- dcl = ['struct %s **%s_data;' % (self._refname, self._name),

- 'int %s_length;' % self._name,

- 'int %s_num_allocated;' % self._name ]

- return dcl

-def NormalizeLine(line):

- global white

- global cppcomment

- line = cppcomment.sub('', line)

- line = line.strip()

- line = white.sub(' ', line)

- return line

-def ProcessOneEntry(newstruct, entry):

- optional = 0

- array = 0

- entry_type = ''

- name = ''

- tag = ''

- tag_set = None

- separator = ''

- fixed_length = ''

- tokens = entry.split(' ')

- while tokens:

- token = tokens[0]

- tokens = tokens[1:]

- if not entry_type:

- if not optional and token == 'optional':

- optional = 1

- continue

- if not array and token == 'array':

- array = 1

- continue

- if not entry_type:

- entry_type = token

- continue

- if not name:

- res = re.match(r'^([^\[\]]+)(\[.*\])?$', token)

- if not res:

- print >>sys.stderr, 'Cannot parse name: \"%s\" around %d' % (

- entry, line_count)

- sys.exit(1)

- name = res.group(1)

- fixed_length = res.group(2)

- if fixed_length:

- fixed_length = fixed_length[1:-1]

- continue

- if not separator:

- separator = token

- if separator != '=':

- print >>sys.stderr, 'Expected "=" after name \"%s\" got %s' % (

- name, token)

- sys.exit(1)

- continue

- if not tag_set:

- tag_set = 1

- if not re.match(r'^(0x)?[0-9]+$', token):

- print >>sys.stderr, 'Expected tag number: \"%s\"' % entry

- sys.exit(1)

- tag = int(token, 0)

- continue

- print >>sys.stderr, 'Cannot parse \"%s\"' % entry

- sys.exit(1)

- if not tag_set:

- print >>sys.stderr, 'Need tag number: \"%s\"' % entry

- sys.exit(1)

- # Create the right entry

- if entry_type == 'bytes':

- if fixed_length:

- newentry = EntryBytes(entry_type, name, tag, fixed_length)

- else:

- newentry = EntryVarBytes(entry_type, name, tag)

- elif entry_type == 'int' and not fixed_length:

- newentry = EntryInt(entry_type, name, tag)

- elif entry_type == 'string' and not fixed_length:

- newentry = EntryString(entry_type, name, tag)

- else:

- res = re.match(r'^struct\[(%s)\]$' % _STRUCT_RE,

- entry_type, re.IGNORECASE)

- if res:

- # References another struct defined in our file

- newentry = EntryStruct(entry_type, name, tag, res.group(1))

- else:

- print >>sys.stderr, 'Bad type: "%s" in "%s"' % (entry_type, entry)

- sys.exit(1)

- structs = []

- if optional:

- newentry.MakeOptional()

- if array:

- newentry.MakeArray()

- newentry.SetStruct(newstruct)

- newentry.SetLineCount(line_count)

- newentry.Verify()

- if array:

- # We need to encapsulate this entry into a struct

- newname = newentry.Name()+ '_array'

- # Now borgify the new entry.

- newentry = EntryArray(newentry)

- newentry.SetStruct(newstruct)

- newentry.SetLineCount(line_count)

- newentry.MakeArray()

- newstruct.AddEntry(newentry)

- return structs

-def ProcessStruct(data):

- tokens = data.split(' ')

- # First three tokens are: 'struct' 'name' '{'

- newstruct = Struct(tokens[1])

- inside = ' '.join(tokens[3:-1])

- tokens = inside.split(';')

- structs = []

- for entry in tokens:

- entry = NormalizeLine(entry)

- if not entry:

- continue

- # It's possible that new structs get defined in here

- structs.extend(ProcessOneEntry(newstruct, entry))

- structs.append(newstruct)

- return structs

-def GetNextStruct(file):

- global line_count

- global cppdirect

- got_struct = 0

- processed_lines = []

- have_c_comment = 0

- data = ''

- while 1:

- line = file.readline()

- if not line:

- break

- line_count += 1

- line = line[:-1]

- if not have_c_comment and re.search(r'/\*', line):

- if re.search(r'/\*.*\*/', line):

- line = re.sub(r'/\*.*\*/', '', line)

- else:

- line = re.sub(r'/\*.*$', '', line)

- have_c_comment = 1

- if have_c_comment:

- if not re.search(r'\*/', line):

- continue

- have_c_comment = 0

- line = re.sub(r'^.*\*/', '', line)

- line = NormalizeLine(line)

- if not line:

- continue

- if not got_struct:

- if re.match(r'#include ["<].*[>"]', line):

- cppdirect.append(line)

- continue

- if re.match(r'^#(if( |def)|endif)', line):

- cppdirect.append(line)

- continue

- if re.match(r'^#define', line):

- headerdirect.append(line)

- continue

- if not re.match(r'^struct %s {$' % _STRUCT_RE,

- line, re.IGNORECASE):

- print >>sys.stderr, 'Missing struct on line %d: %s' % (

- line_count, line)

- sys.exit(1)

- else:

- got_struct = 1

- data += line

- continue

- # We are inside the struct

- tokens = line.split('}')

- if len(tokens) == 1:

- data += ' ' + line

- continue

- if len(tokens[1]):

- print >>sys.stderr, 'Trailing garbage after struct on line %d' % (

- line_count )

- sys.exit(1)

- # We found the end of the struct

- data += ' %s}' % tokens[0]

- break

- # Remove any comments, that might be in there

- data = re.sub(r'/\*.*\*/', '', data)

- return data

-def Parse(file):

- """

- Parses the input file and returns C code and corresponding header file.

- """

- entities = []

- while 1:

- # Just gets the whole struct nicely formatted

- data = GetNextStruct(file)

- if not data:

- break

- entities.extend(ProcessStruct(data))

- return entities

-def GuardName(name):

- name = '_'.join(name.split('.'))

- name = '_'.join(name.split('/'))

- guard = '_'+name.upper()+'_'

- return guard

-def HeaderPreamble(name):

- guard = GuardName(name)

- pre = (

- '/*\n'

- ' * Automatically generated from %s\n'

- ' */\n\n'

- '#ifndef %s\n'

- '#define %s\n\n' ) % (

- name, guard, guard)

- # insert stdint.h - let's hope everyone has it

- pre += (

- '#include <event-config.h>\n'

- '#ifdef _EVENT_HAVE_STDINT_H\n'

- '#include <stdint.h>\n'

- '#endif\n' )

- for statement in headerdirect:

- pre += '%s\n' % statement

- if headerdirect:

- pre += '\n'

- pre += (

- '#define EVTAG_HAS(msg, member) ((msg)->member##_set == 1)\n'

- '#ifdef __GNUC__\n'

- '#define EVTAG_ASSIGN(msg, member, args...) '

- '(*(msg)->base->member##_assign)(msg, ## args)\n'

- '#define EVTAG_GET(msg, member, args...) '

- '(*(msg)->base->member##_get)(msg, ## args)\n'

- '#else\n'

- '#define EVTAG_ASSIGN(msg, member, ...) '

- '(*(msg)->base->member##_assign)(msg, ## __VA_ARGS__)\n'

- '#define EVTAG_GET(msg, member, ...) '

- '(*(msg)->base->member##_get)(msg, ## __VA_ARGS__)\n'

- '#endif\n'

- '#define EVTAG_ADD(msg, member) (*(msg)->base->member##_add)(msg)\n'

- '#define EVTAG_LEN(msg, member) ((msg)->member##_length)\n'

- )

- return pre

-def HeaderPostamble(name):

- guard = GuardName(name)

- return '#endif /* %s */' % guard

-def BodyPreamble(name):

- global _NAME

- global _VERSION

- header_file = '.'.join(name.split('.')[:-1]) + '.gen.h'

- pre = ( '/*\n'

- ' * Automatically generated from %s\n'

- ' * by %s/%s. DO NOT EDIT THIS FILE.\n'

- ' */\n\n' ) % (name, _NAME, _VERSION)

- pre += ( '#include <sys/types.h>\n'

- '#ifdef _EVENT_HAVE_SYS_TIME_H\n'

- '#include <sys/time.h>\n'

- '#endif\n'

- '#include <stdlib.h>\n'

- '#include <string.h>\n'

- '#include <assert.h>\n'

- '#define EVENT_NO_STRUCT\n'

- '#include <event.h>\n\n'

- '#ifdef _EVENT___func__\n'

- '#define __func__ _EVENT___func__\n'

- '#endif\n' )

- for statement in cppdirect:

- pre += '%s\n' % statement

- pre += '\n#include "%s"\n\n' % header_file

- pre += 'void event_err(int eval, const char *fmt, ...);\n'

- pre += 'void event_warn(const char *fmt, ...);\n'

- pre += 'void event_errx(int eval, const char *fmt, ...);\n'

- pre += 'void event_warnx(const char *fmt, ...);\n\n'

- return pre

-def main(argv):

- if len(argv) < 2 or not argv[1]:

- print >>sys.stderr, 'Need RPC description file as first argument.'

- sys.exit(1)

- filename = argv[1]

- ext = filename.split('.')[-1]

- if ext != 'rpc':

- print >>sys.stderr, 'Unrecognized file extension: %s' % ext

- sys.exit(1)

- print >>sys.stderr, 'Reading \"%s\"' % filename

- fp = open(filename, 'r')

- entities = Parse(fp)

- fp.close()

- header_file = '.'.join(filename.split('.')[:-1]) + '.gen.h'

- impl_file = '.'.join(filename.split('.')[:-1]) + '.gen.c'

- print >>sys.stderr, '... creating "%s"' % header_file

- header_fp = open(header_file, 'w')

- print >>header_fp, HeaderPreamble(filename)

- # Create forward declarations: allows other structs to reference

- # each other

- for entry in entities:

- entry.PrintForwardDeclaration(header_fp)

- print >>header_fp, ''

- for entry in entities:

- entry.PrintTags(header_fp)

- entry.PrintDeclaration(header_fp)

- print >>header_fp, HeaderPostamble(filename)

- header_fp.close()

- print >>sys.stderr, '... creating "%s"' % impl_file

- impl_fp = open(impl_file, 'w')

- print >>impl_fp, BodyPreamble(filename)

- for entry in entities:

- entry.PrintCode(impl_fp)

- impl_fp.close()

-if __name__ == '__main__':

- main(sys.argv)

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