mirror of https://github.com/nzp-team/tools.git
259 lines
9.5 KiB
Python
259 lines
9.5 KiB
Python
# vim:ts=4:et
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# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# <pep8 compliant>
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quotables = ("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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+ "abcdefghijklmnopqrstuvwxyz!#$%&*+-./:?@|~_^")
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class PListError(Exception):
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def __init__(self, line, message):
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Exception.__init__(self, "%d: %s" % (line, message))
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self.line = line
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class pldata:
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def __init__(self, src = ''):
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self.src = src
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self.pos = 0;
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self.end = len(self.src)
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self.line = 1
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def skip_space(self):
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while self.pos < self.end:
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c = self.src[self.pos]
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if not c.isspace():
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if c == '/' and self.pos < self.end - 1: #comments
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if self.src[self.pos + 1] == '/': # // coment
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self.pos += 2
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while self.pos < self.end:
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c = self.src[self.pos]
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if c == '\n':
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break
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self.pos += 1
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if self.pos >= self.end:
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raise PListError(self.line,
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"Reached end of string in comment")
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elif self.src[self.pos + 1] == '*': # /* comment */
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start_line = self.line
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self.pos += 2
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while self.pos < self.end:
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c = self.src[self.pos]
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if c == '\n':
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self.line += 1
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elif (c == '*' and self.pos < self.end - 1
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and self.src[self.pos + 1] == '/'):
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self.pos += 1
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break
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self.pos += 1
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if self.pos >= self.end:
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raise PListError(start_line,
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"Reached end of string in comment")
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else:
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return True
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else:
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return True
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if c == '\n':
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self.line += 1
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self.pos += 1
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raise PListError(self.line, "Reached end of string")
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def parse_quoted_string(self):
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start_line = self.line
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long_string = False
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escaped = 0
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shrink = 0
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hexa = False
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self.pos += 1
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start = self.pos
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if (self.pos < self.end - 1 and self.src[self.pos] == '"'
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and self.src[self.pos + 1] == '"'):
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self.pos += 2
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long_string = True
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start += 2
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while self.pos < self.end:
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c = self.src[self.pos]
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if escaped:
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if escaped == 1 and c == '0':
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escaped += 1
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hexa = False
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elif escaped > 1:
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if escaped == 2 and c == 'x':
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hexa = True
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shring += 1
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escaped += 1
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elif hex and c.isxdigit():
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shrink += 1
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escaped += 1
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elif c in range(0, 8):
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shrink += 1
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escaped += 1
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else:
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self.pos -= 1
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escaped = 0
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else:
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escaped = 0
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else:
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if c == '\\':
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escaped = 1
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shrink += 1
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elif (c == '"'
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and (not long_string
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or (self.pos < self.end - 2
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and self.src[self.pos + 1] == '"'
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and self.src[self.pos + 2] == '"'))):
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break
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if c == '\n':
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self.line += 1
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self.pos += 1
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if self.pos >= self.end:
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raise PListError(start_line,
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"Reached end of string while parsing quoted string")
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if self.pos - start - shrink == 0:
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return ""
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s = self.src[start:self.pos]
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self.pos += 1
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if long_string:
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self.pos += 2
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return eval('"""' + s + '"""')
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def parse_unquoted_string(self):
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start = self.pos
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while self.pos < self.end:
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if self.src[self.pos] not in quotables:
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break
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self.pos += 1
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return self.src[start:self.pos]
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def parse_data(self):
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start_line = self.line
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self.pos += 1
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start = self.pos
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nibbles = 0
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while self.pos < self.end:
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if self.src[self.pos].isxdigit:
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nibbles += 1
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self.pos += 1
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continue
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if self.src[self.pos] == '>':
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if nibbles & 1:
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raise PListError(self.line,
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"Invalid data, missing nibble")
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s = self.src[start:self.pos]
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self.pos += 1
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return binascii.a2b_hex(s)
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raise PListError(self.line,
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"Invalid character in data")
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raise PListError(start_line,
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"Reached end of string while parsing data")
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def parse(self):
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self.skip_space()
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if self.src[self.pos] == '{':
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item = {}
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self.pos += 1
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while self.skip_space() and self.src[self.pos] != '}':
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key = self.parse()
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if type(key) != str:
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raise PListError(self.line,
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"Key is not a string")
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self.skip_space()
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if self.src[self.pos] != '=':
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raise PListError(self.line,
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"Unexpected character (expected '=')")
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self.pos += 1
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value = self.parse()
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if self.src[self.pos] == ';':
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self.pos += 1
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elif self.src[self.pos] != '}':
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raise PListError(self.line,
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"Unexpected character (wanted ';' or '}')")
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item[key] = value
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if self.pos >= self.end:
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raise PListError(self.line,
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"Unexpected end of string when parsing dictionary")
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self.pos += 1
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return item
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elif self.src[self.pos] == '(':
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item = []
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self.pos += 1
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while self.skip_space() and self.src[self.pos] != ')':
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value = self.parse()
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self.skip_space()
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if self.src[self.pos] == ',':
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self.pos += 1
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elif self.src[self.pos] != ')':
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raise PListError(self.line,
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"Unexpected character (wanted ',' or ')')")
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item.append(value)
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self.pos += 1
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return item
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elif self.src[self.pos] == '<':
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return self.parse_data()
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elif self.src[self.pos] == '"':
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return self.parse_quoted_string()
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else:
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return self.parse_unquoted_string()
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def write_string(self, item):
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quote = False
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for i in item:
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if i not in quotables:
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quote = True
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break
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if quote:
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item = repr(item)
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# repr uses ', we want "
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item = '"' + item[1:-1].replace('"', '\\"') + '"'
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self.data.append(item)
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def write_item(self, item, level):
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if type(item) == dict:
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if not item:
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self.data.append("{ }")
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return
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self.data.append("{\n")
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for i in item.items():
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self.data.append('\t' * (level + 1))
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self.write_string(i[0])
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self.data.append(' = ')
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self.write_item(i[1], level + 1)
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self.data.append(';\n')
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self.data.append('\t' * (level))
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self.data.append("}")
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elif type(item) in(list, tuple):
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if not item:
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self.data.append("( )")
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return
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self.data.append("(\n")
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for n, i in enumerate(item):
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self.data.append('\t' * (level + 1))
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self.write_item(i, level + 1)
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if n < len(item) - 1:
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self.data.append(',\n')
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self.data.append('\n')
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self.data.append('\t' * (level))
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self.data.append(")")
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elif type(item) == bytes:
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self.data.append('<')
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self.data.append(binascii.b2a_hex(item))
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self.data.append('>')
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elif type(item) == str:
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self.write_string(item)
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elif type(item) in [int, float]:
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self.write_string(str(item))
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else:
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raise PListError(0, "unsupported type")
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def write(self, item):
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self.data = []
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self.write_item(item, 0)
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return ''.join(self.data)
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