Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: v0.9.11
Fetching contributors…

Cannot retrieve contributors at this time

executable file 373 lines (313 sloc) 10.794 kb
#!/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
from os.path import dirname
import re
import sys
import string
sys.path.append(dirname(__file__) + "/../deps/v8/tools");
import jsmin
def ToCArray(filename, lines):
result = []
row = 1
col = 0
for chr in lines:
col += 1
if chr == "\n" or chr == "\r":
row += 1
col = 0
value = ord(chr)
if value >= 128:
print 'non-ascii value ' + filename + ':' + str(row) + ':' + str(col)
sys.exit(1);
result.append(str(value))
result.append("0")
return ", ".join(result)
def CompressScript(lines, do_jsmin):
# If we're not expecting this code to be user visible, we can run it through
# a more aggressive minifier.
if do_jsmin:
minifier = JavaScriptMinifier()
return minifier.JSMinify(lines)
# Remove stuff from the source that we don't want to appear when
# people print the source code using Function.prototype.toString().
# Note that we could easily compress the scripts mode but don't
# since we want it to remain readable.
#lines = re.sub('//.*\n', '\n', lines) # end-of-line comments
#lines = re.sub(re.compile(r'/\*.*?\*/', re.DOTALL), '', lines) # comments.
#lines = re.sub('\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
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('^const\s+([a-zA-Z0-9_]+)\s*=\s*([^;]*);$')
MACRO_PATTERN = re.compile('^macro\s+([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*=\s*([^;]*);$')
PYTHON_MACRO_PATTERN = re.compile('^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 Exception("Illegal line: " + line)
return (constants, macros)
HEADER_TEMPLATE = """\
#ifndef node_natives_h
#define node_natives_h
namespace node {
%(source_lines)s\
struct _native {
const char* name;
const char* source;
size_t source_len;
};
static const struct _native natives[] = {
%(native_lines)s\
{ NULL, NULL, 0 } /* sentinel */
};
}
#endif
"""
NATIVE_DECLARATION = """\
{ "%(id)s", %(id)s_native, sizeof(%(id)s_native)-1 },
"""
SOURCE_DECLARATION = """\
const char %(id)s_native[] = { %(data)s };
"""
GET_DELAY_INDEX_CASE = """\
if (strcmp(name, "%(id)s") == 0) return %(i)i;
"""
GET_DELAY_SCRIPT_SOURCE_CASE = """\
if (index == %(i)i) return Vector<const char>(%(id)s, %(length)i);
"""
GET_DELAY_SCRIPT_NAME_CASE = """\
if (index == %(i)i) return Vector<const char>("%(name)s", %(length)i);
"""
def JS2C(source, target):
ids = []
delay_ids = []
modules = []
# Locate the macros file name.
consts = {}
macros = {}
macro_lines = []
for s in source:
if (os.path.split(str(s))[1]).endswith('macros.py'):
macro_lines.extend(ReadLines(str(s)))
else:
modules.append(s)
# Process input from all *macro.py files
(consts, macros) = ReadMacros(macro_lines)
# Build source code lines
source_lines = [ ]
source_lines_empty = []
native_lines = []
for s in modules:
delay = str(s).endswith('-delay.js')
lines = ReadFile(str(s))
do_jsmin = lines.find('// jsminify this file, js2c: jsmin') != -1
lines = ExpandConstants(lines, consts)
lines = ExpandMacros(lines, macros)
lines = CompressScript(lines, do_jsmin)
data = ToCArray(s, lines)
id = os.path.basename(str(s)).split('.')[0]
if delay: id = id[:-6]
if delay:
delay_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': 0 })
native_lines.append(NATIVE_DECLARATION % { 'id': id })
# Build delay support functions
get_index_cases = [ ]
get_script_source_cases = [ ]
get_script_name_cases = [ ]
i = 0
for (id, length) in delay_ids:
native_name = "native %s.js" % id
get_index_cases.append(GET_DELAY_INDEX_CASE % { 'id': id, 'i': i })
get_script_source_cases.append(GET_DELAY_SCRIPT_SOURCE_CASE % {
'id': id,
'length': length,
'i': i
})
get_script_name_cases.append(GET_DELAY_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_DELAY_INDEX_CASE % { 'id': id, 'i': i })
get_script_source_cases.append(GET_DELAY_SCRIPT_SOURCE_CASE % {
'id': id,
'length': length,
'i': i
})
get_script_name_cases.append(GET_DELAY_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(delay_ids),
'delay_count': len(delay_ids),
'source_lines': "\n".join(source_lines),
'native_lines': "\n".join(native_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)
})
output.close()
if len(target) > 1:
output = open(str(target[1]), "w")
output.write(HEADER_TEMPLATE % {
'builtin_count': len(ids) + len(delay_ids),
'delay_count': len(delay_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)
})
output.close()
def main():
natives = sys.argv[1]
source_files = sys.argv[2:]
JS2C(source_files, [natives])
if __name__ == "__main__":
main()
Jump to Line
Something went wrong with that request. Please try again.