NovaBryan/EVE_Dump
Log | Files | 📦 下载最新源码 (.zip) | Refs | README

text_file.py (4457B)

      1 #Embedded file name: C:\BuildAgent\work\20d73f1b24eed06e\eve\release\V24.01\carbon\common\stdlib\distutils\text_file.py
      2 __revision__ = '$Id: text_file.py 82110 2010-06-20 13:38:51Z kristjan.jonsson $'
      3 import sys
      4 
      5 class TextFile:
      6     default_options = {'strip_comments': 1,
      7      'skip_blanks': 1,
      8      'lstrip_ws': 0,
      9      'rstrip_ws': 1,
     10      'join_lines': 0,
     11      'collapse_join': 0}
     12 
     13     def __init__(self, filename = None, file = None, **options):
     14         if filename is None and file is None:
     15             raise RuntimeError, "you must supply either or both of 'filename' and 'file'"
     16         for opt in self.default_options.keys():
     17             if opt in options:
     18                 setattr(self, opt, options[opt])
     19             else:
     20                 setattr(self, opt, self.default_options[opt])
     21 
     22         for opt in options.keys():
     23             if opt not in self.default_options:
     24                 raise KeyError, "invalid TextFile option '%s'" % opt
     25 
     26         if file is None:
     27             self.open(filename)
     28         else:
     29             self.filename = filename
     30             self.file = file
     31             self.current_line = 0
     32         self.linebuf = []
     33 
     34     def open(self, filename):
     35         self.filename = filename
     36         self.file = open(self.filename, 'r')
     37         self.current_line = 0
     38 
     39     def close(self):
     40         self.file.close()
     41         self.file = None
     42         self.filename = None
     43         self.current_line = None
     44 
     45     def gen_error(self, msg, line = None):
     46         outmsg = []
     47         if line is None:
     48             line = self.current_line
     49         outmsg.append(self.filename + ', ')
     50         if isinstance(line, (list, tuple)):
     51             outmsg.append('lines %d-%d: ' % tuple(line))
     52         else:
     53             outmsg.append('line %d: ' % line)
     54         outmsg.append(str(msg))
     55         return ''.join(outmsg)
     56 
     57     def error(self, msg, line = None):
     58         raise ValueError, 'error: ' + self.gen_error(msg, line)
     59 
     60     def warn(self, msg, line = None):
     61         sys.stderr.write('warning: ' + self.gen_error(msg, line) + '\n')
     62 
     63     def readline(self):
     64         if self.linebuf:
     65             line = self.linebuf[-1]
     66             del self.linebuf[-1]
     67             return line
     68         buildup_line = ''
     69         while 1:
     70             line = self.file.readline()
     71             if line == '':
     72                 line = None
     73             if self.strip_comments and line:
     74                 pos = line.find('#')
     75                 if pos == -1:
     76                     pass
     77                 elif pos == 0 or line[pos - 1] != '\\':
     78                     eol = line[-1] == '\n' and '\n' or ''
     79                     line = line[0:pos] + eol
     80                     if line.strip() == '':
     81                         continue
     82                 else:
     83                     line = line.replace('\\#', '#')
     84             if self.join_lines and buildup_line:
     85                 if line is None:
     86                     self.warn('continuation line immediately precedes end-of-file')
     87                     return buildup_line
     88                 if self.collapse_join:
     89                     line = line.lstrip()
     90                 line = buildup_line + line
     91                 if isinstance(self.current_line, list):
     92                     self.current_line[1] = self.current_line[1] + 1
     93                 else:
     94                     self.current_line = [self.current_line, self.current_line + 1]
     95             else:
     96                 if line is None:
     97                     return
     98                 if isinstance(self.current_line, list):
     99                     self.current_line = self.current_line[1] + 1
    100                 else:
    101                     self.current_line = self.current_line + 1
    102             if self.lstrip_ws and self.rstrip_ws:
    103                 line = line.strip()
    104             elif self.lstrip_ws:
    105                 line = line.lstrip()
    106             elif self.rstrip_ws:
    107                 line = line.rstrip()
    108             if (line == '' or line == '\n') and self.skip_blanks:
    109                 continue
    110             if self.join_lines:
    111                 if line[-1] == '\\':
    112                     buildup_line = line[:-1]
    113                     continue
    114                 if line[-2:] == '\\\n':
    115                     buildup_line = line[0:-2] + '\n'
    116                     continue
    117             return line
    118 
    119     def readlines(self):
    120         lines = []
    121         while 1:
    122             line = self.readline()
    123             if line is None:
    124                 return lines
    125             lines.append(line)
    126 
    127     def unreadline(self, line):
    128         self.linebuf.append(line)