#!/usr/bin/env python
#
# Copyright 2006-2008 the V8 project authors. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# This is a utility for converting JavaScript source code into C-style
# char arrays. It is used for embedded JavaScript code in the V8
# library.
import os, re, sys, string
import jsmin
def ToCArray(lines):
result = []
for chr in lines:
value = ord(chr)
assert value < 128
result.append(str(value))
result.append("0")
return ", ".join(result)
def RemoveCommentsAndTrailingWhitespace(lines):
lines = re.sub(r'//.*\n', '\n', lines) # end-of-line comments
lines = re.sub(re.compile(r'/\*.*?\*/', re.DOTALL), '', lines) # comments.
lines = re.sub(r'\s+\n+', '\n', lines) # trailing whitespace
return lines
def ReadFile(filename):
file = open(filename, "rt")
try:
lines = file.read()
finally:
file.close()
return lines
def ReadLines(filename):
result = []
for line in open(filename, "rt"):
if '#' in line:
line = line[:line.index('#')]
line = line.strip()
if len(line) > 0:
result.append(line)
return result
def LoadConfigFrom(name):
import ConfigParser
config = ConfigParser.ConfigParser()
config.read(name)
return config
def ParseValue(string):
string = string.strip()
if string.startswith('[') and string.endswith(']'):
return string.lstrip('[').rstrip(']').split()
else:
return string
EVAL_PATTERN = re.compile(r'\beval\s*\(');
WITH_PATTERN = re.compile(r'\bwith\s*\(');
def Validate(lines, file):
lines = RemoveCommentsAndTrailingWhitespace(lines)
# Because of simplified context setup, eval and with is not
# allowed in the natives files.
eval_match = EVAL_PATTERN.search(lines)
if eval_match:
raise ("Eval disallowed in natives: %s" % file)
with_match = WITH_PATTERN.search(lines)
if with_match:
raise ("With statements disallowed in natives: %s" % file)
def ExpandConstants(lines, constants):
for key, value in constants.items():
lines = lines.replace(key, str(value))
return lines
def ExpandMacros(lines, macros):
for name, macro in macros.items():
start = lines.find(name + '(', 0)
while start != -1:
# Scan over the arguments
assert lines[start + len(name)] == '('
height = 1
end = start + len(name) + 1
last_match = end
arg_index = 0
mapping = { }
def add_arg(str):
# Remember to expand recursively in the arguments
replacement = ExpandMacros(str.strip(), macros)
mapping[macro.args[arg_index]] = replacement
while end < len(lines) and height > 0:
# We don't count commas at higher nesting levels.
if lines[end] == ',' and height == 1:
add_arg(lines[last_match:end])
last_match = end + 1
elif lines[end] in ['(', '{', '[']:
height = height + 1
elif lines[end] in [')', '}', ']']:
height = height - 1
end = end + 1
# Remember to add the last match.
add_arg(lines[last_match:end-1])
result = macro.expand(mapping)
# Replace the occurrence of the macro with the expansion
lines = lines[:start] + result + lines[end:]
start = lines.find(name + '(', end)
return lines
class TextMacro:
def __init__(self, args, body):
self.args = args
self.body = body
def expand(self, mapping):
result = self.body
for key, value in mapping.items():
result = result.replace(key, value)
return result
class PythonMacro:
def __init__(self, args, fun):
self.args = args
self.fun = fun
def expand(self, mapping):
args = []
for arg in self.args:
args.append(mapping[arg])
return str(self.fun(*args))
CONST_PATTERN = re.compile(r'^const\s+([a-zA-Z0-9_]+)\s*=\s*([^;]*);$')
MACRO_PATTERN = re.compile(r'^macro\s+([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*=\s*([^;]*);$')
PYTHON_MACRO_PATTERN = re.compile(r'^python\s+macro\s+([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*=\s*([^;]*);$')
def ReadMacros(lines):
constants = { }
macros = { }
for line in lines:
hash = line.find('#')
if hash != -1: line = line[:hash]
line = line.strip()
if len(line) is 0: continue
const_match = CONST_PATTERN.match(line)
if const_match:
name = const_match.group(1)
value = const_match.group(2).strip()
constants[name] = value
else:
macro_match = MACRO_PATTERN.match(line)
if macro_match:
name = macro_match.group(1)
args = map(string.strip, macro_match.group(2).split(','))
body = macro_match.group(3).strip()
macros[name] = TextMacro(args, body)
else:
python_match = PYTHON_MACRO_PATTERN.match(line)
if python_match:
name = python_match.group(1)
args = map(string.strip, python_match.group(2).split(','))
body = python_match.group(3).strip()
fun = eval("lambda " + ",".join(args) + ': ' + body)
macros[name] = PythonMacro(args, fun)
else:
raise ("Illegal line: " + line)
return (constants, macros)
HEADER_TEMPLATE = """\
// Copyright 2008 Google Inc. All Rights Reserved.
// This file was generated from .js source files by SCons. If you
// want to make changes to this file you should either change the
// javascript source files or the SConstruct script.
#include "v8.h"
#include "natives.h"
namespace v8 {
namespace internal {
%(source_lines)s\
template <>
int NativesCollection<%(type)s>::GetBuiltinsCount() {
return %(builtin_count)i;
}
template <>
int NativesCollection<%(type)s>::GetDebuggerCount() {
return %(debugger_count)i;
}
template <>
int NativesCollection<%(type)s>::GetIndex(const char* name) {
%(get_index_cases)s\
return -1;
}
template <>
Vector<const char> NativesCollection<%(type)s>::GetScriptSource(int index) {
%(get_script_source_cases)s\
return Vector<const char>("", 0);
}
template <>
Vector<const char> NativesCollection<%(type)s>::GetScriptName(int index) {
%(get_script_name_cases)s\
return Vector<const char>("", 0);
}
} // internal
} // v8
"""
SOURCE_DECLARATION = """\
static const char %(id)s[] = { %(data)s };
"""
GET_DEBUGGER_INDEX_CASE = """\
if (strcmp(name, "%(id)s") == 0) return %(i)i;
"""
GET_DEBUGGER_SCRIPT_SOURCE_CASE = """\
if (index == %(i)i) return Vector<const char>(%(id)s, %(length)i);
"""
GET_DEBUGGER_SCRIPT_NAME_CASE = """\
if (index == %(i)i) return Vector<const char>("%(name)s", %(length)i);
"""
def JS2C(source, target, env):
ids = []
debugger_ids = []
modules = []
# Locate the macros file name.
consts = {}
macros = {}
for s in source:
if 'macros.py' == (os.path.split(str(s))[1]):
(consts, macros) = ReadMacros(ReadLines(str(s)))
else:
modules.append(s)
# Build source code lines
source_lines = [ ]
minifier = jsmin.JavaScriptMinifier()
source_lines_empty = []
for module in modules:
filename = str(module)
debugger = filename.endswith('-debugger.js')
lines = ReadFile(filename)
lines = ExpandConstants(lines, consts)
lines = ExpandMacros(lines, macros)
Validate(lines, filename)
lines = minifier.JSMinify(lines)
data = ToCArray(lines)
id = (os.path.split(filename)[1])[:-3]
if debugger: id = id[:-9]
if debugger:
debugger_ids.append((id, len(lines)))
else:
ids.append((id, len(lines)))
source_lines.append(SOURCE_DECLARATION % { 'id': id, 'data': data })
source_lines_empty.append(SOURCE_DECLARATION % { 'id': id, 'data': data })
# Build debugger support functions
get_index_cases = [ ]
get_script_source_cases = [ ]
get_script_name_cases = [ ]
i = 0
for (id, length) in debugger_ids:
native_name = "native %s.js" % id
get_index_cases.append(GET_DEBUGGER_INDEX_CASE % { 'id': id, 'i': i })
get_script_source_cases.append(GET_DEBUGGER_SCRIPT_SOURCE_CASE % {
'id': id,
'length': length,
'i': i
})
get_script_name_cases.append(GET_DEBUGGER_SCRIPT_NAME_CASE % {
'name': native_name,
'length': len(native_name),
'i': i
});
i = i + 1
for (id, length) in ids:
native_name = "native %s.js" % id
get_index_cases.append(GET_DEBUGGER_INDEX_CASE % { 'id': id, 'i': i })
get_script_source_cases.append(GET_DEBUGGER_SCRIPT_SOURCE_CASE % {
'id': id,
'length': length,
'i': i
})
get_script_name_cases.append(GET_DEBUGGER_SCRIPT_NAME_CASE % {
'name': native_name,
'length': len(native_name),
'i': i
});
i = i + 1
# Emit result
output = open(str(target[0]), "w")
output.write(HEADER_TEMPLATE % {
'builtin_count': len(ids) + len(debugger_ids),
'debugger_count': len(debugger_ids),
'source_lines': "\n".join(source_lines),
'get_index_cases': "".join(get_index_cases),
'get_script_source_cases': "".join(get_script_source_cases),
'get_script_name_cases': "".join(get_script_name_cases),
'type': env['TYPE']
})
output.close()
if len(target) > 1:
output = open(str(target[1]), "w")
output.write(HEADER_TEMPLATE % {
'builtin_count': len(ids) + len(debugger_ids),
'debugger_count': len(debugger_ids),
'source_lines': "\n".join(source_lines_empty),
'get_index_cases': "".join(get_index_cases),
'get_script_source_cases': "".join(get_script_source_cases),
'get_script_name_cases': "".join(get_script_name_cases),
'type': env['TYPE']
})
output.close()
def main():
natives = sys.argv[1]
natives_empty = sys.argv[2]
type = sys.argv[3]
source_files = sys.argv[4:]
JS2C(source_files, [natives, natives_empty], { 'TYPE': type })
if __name__ == "__main__":
main()