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#############################################################################
##
## Copyright (C) 2021 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the test suite of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:COMM$
##
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
## accordance with the commercial license agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and The Qt Company. For licensing terms
## and conditions see https://www.qt.io/terms-conditions. For further
## information use the contact form at https://www.qt.io/contact-us.
##
## $QT_END_LICENSE$
##
##
##
##
##
##
##
##
############################################################################
"""Utilities shared among the CLDR extraction tools.
Functions:
unicode2hex() -- converts unicode text to UCS-2 in hex form.
wrap_list() -- map list to comma-separated string, 20 entries per line.
Classes:
Error -- A shared error class.
Transcriber -- edit a file by writing a temporary file, then renaming.
SourceFileEditor -- adds standard prelude and tail handling to Transcriber.
"""
import os
import tempfile
class Error (StandardError):
__upinit = StandardError.__init__
def __init__(self, msg, *args):
self.__upinit(msg, *args)
self.message = msg
def __str__(self):
return self.message
def unicode2hex(s):
lst = []
for x in s:
v = ord(x)
if v > 0xFFFF:
# make a surrogate pair
# copied from qchar.h
high = (v >> 10) + 0xd7c0
low = (v % 0x400 + 0xdc00)
lst.append(hex(high))
lst.append(hex(low))
else:
lst.append(hex(v))
return lst
def wrap_list(lst):
def split(lst, size):
while lst:
head, lst = lst[:size], lst[size:]
yield head
return ",\n".join(", ".join(x) for x in split(lst, 20))
class Transcriber (object):
"""Helper class to facilitate rewriting source files.
This class takes care of the temporary file manipulation. Derived
classes need to implement transcribing of the content, with
whatever modifications they may want. Members reader and writer
are exposed; use writer.write() to output to the new file; use
reader.readline() or iterate reader to read the original.
Callers should call close() on success or cleanup() on failure (to
clear away the temporary file).
"""
def __init__(self, path, temp):
# Open the old file
self.reader = open(path)
# Create a temp file to write the new data into
temp, tempPath = tempfile.mkstemp(os.path.split(path)[1], dir = temp)
self.__names = path, tempPath
self.writer = os.fdopen(temp, "w")
def close(self):
self.reader.close()
self.writer.close()
self.reader = self.writer = None
source, temp = self.__names
os.remove(source)
os.rename(temp, source)
def cleanup(self):
if self.__names:
self.reader.close()
self.writer.close()
# Remove temp-file:
os.remove(self.__names[1])
self.__names = ()
class SourceFileEditor (Transcriber):
"""Transcriber with transcription of code around a gnerated block.
We have a common pattern of source files with a generated part
embedded in a context that's not touched by the regeneration
scripts. The generated part is, in each case, marked with a common
pair of start and end markers. We transcribe the old file to a new
temporary file; on success, we then remove the original and move
the new version to replace it.
This class takes care of transcribing the parts before and after
the generated content; on creation, an instance will copy the
preamble up to the start marker; its close() will skip over the
original's generated content and resume transcribing with the end
marker. Derived classes need only implement the generation of the
content in between.
Callers should call close() on success or cleanup() on failure (to
clear away the temporary file); see Transcriber.
"""
__upinit = Transcriber.__init__
def __init__(self, path, temp):
"""Set up the source file editor.
Requires two arguments: the path to the source file to be read
and, on success, replaced with a new version; and the
directory in which to store the temporary file during the
rewrite."""
self.__upinit(path, temp)
self.__copyPrelude()
__upclose = Transcriber.close
def close(self):
self.__copyTail()
self.__upclose()
# Implementation details:
GENERATED_BLOCK_START = '// GENERATED PART STARTS HERE'
GENERATED_BLOCK_END = '// GENERATED PART ENDS HERE'
def __copyPrelude(self):
# Copy over the first non-generated section to the new file
for line in self.reader:
self.writer.write(line)
if line.strip() == self.GENERATED_BLOCK_START:
break
def __copyTail(self):
# Skip through the old generated data in the old file
for line in self.reader:
if line.strip() == self.GENERATED_BLOCK_END:
self.writer.write(line)
break
# Transcribe the remainder:
for line in self.reader:
self.writer.write(line)
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