openfile.py :  » Business-Application » ThanCad » thancad-0.0.9 » p_gfil » Python Open Source

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Python Open Source » Business Application » ThanCad 
ThanCad » thancad 0.0.9 » p_gfil » openfile.py
# -*- coding: iso-8859-7 -*-

import sys
from p_ggen import path,Struct,prg
import filmed, ffff
openFilePar = lambda iun, f: None
ppro = 'egn', 'ydr'
lang = -1
files1 = []

if 1:
          DLERRLIN = 'Error at line'
          DLWARLIN = 'Warning at line'
          DLOFFIL  = 'Of file'
          DLERRSTO = 'Errors logged. Program stops.'
          DLMAXNUM = 'Max number of'
          DLERRSYN = 'Syntax error.'
          DLFILACC = 'File can not be accessed'
          DLLIBUNI = 'Library filDat.lib accepts file units between'
          DLFILEND = 'Unexpected end of file.'
          DLFILREA = 'File can not be read.'
          DLDSKFUL = 'The disk is full.'
          DLFILWRI = 'The file can not be written to.'
          DLTRYAGA = 'Try again.'
          DLFILSUF = 'Do not specify suffix in the filename!'

          DLMAXPRE = 'Up to 2 prefixes are allowed.'
          DLPREFIX = 'PREFIX : '
          DLPREFI1 = 'PREFIX 1 : '
          DLPREFI2 = 'PREFIX 2 : '
          DLMES01 = 'The data files are composed by a prefix and a suffix.'
          DLMES02 = 'The suffix is predefined, and the suffix is given by the user.'
          DLMES03 = 'For example given the prefix "' + ppro[0] + '"'
          DLMES04 = 'the program opens the following FILES:'
          DLMES05 = 'For example given the prefix 1 "' + ppro[0] + " and the prefix2 " + ppro[1] + '"'
          DLFILDAT = '(data)'
          DLFILRES = '(results)'
          DLFILOPT = '(optional)'
          DLNOSUF = 'Do not append a suffix to the prefix!'
          DLNODESC = '(No description available for previous program)'
          DLGETPRE = 'Getting prefix from file'
          DLERRPRV = 'Error in the execution of the previous program:'
          DLLOGOST = '!$B3)"Y%U$B%V"U%T$!X7"G3'

def setPar(fun):
    "Sets the user defined function for reading extended information from mediat.tmp."
    global openFilePar
    openFilePar = fun

def openFile1(un, ext, stat, iPro, desc):
      """Requests a file to be opened.

c-----un = 0  :      .
c                  , desc     .
c                 iPro=-1,      . ..
c     un = 999:        . 
c                .
c     un = 888:        . 
c                .      FILNAMMED
c     un > 0  : File unit.  uArx<un<uTel.       un
c                  0, 888, 999   .
c
c     ext :   
c
c     stat = 'old' :         
c                    .
c     stat = ' '   :      .
c     stat = 'opt' :      .   
c                         (optional).
c                            
c                    optional,         
c                     (       
c                     ).
c
c     iPro = 1  2   :   (    : 1  2)
c     iPro = -1  -2 :  .      
c                            
c                          .    
c                           .
c                             
c                      (batch file).
c
c     desc :     
      """
#     hhhh()
      global descp, dispLogo, files1, fylPro, lang
      lang = -1
      if un == 0:
          descp = desc
          dispLogo = iPro != -1
    files1 = []
          if lang == 0: optFile1(0, -1)  # If language is not set, then set language to Greek
      elif un == 888:
          fylPro = True
          return openFiles1()
      elif un == 999:
          fylPro = False
          return openFiles1()
      else:
          if not (1 <= abs(iPro) <= 2):
              prg(' Sr openFile1: %d %s' % (iPro, DLMAXPRE))
              sys.exit(1)
    file1 = Struct()
    file1.ext = ext; file1.stat = stat; file1.desc = desc; file1.iPro = iPro
    file1.linesf = 0             # It signals that the file unit is used
          files1.append(file1)


def opFile1e(un, ext, stat, pro, desc):
        "Opens the file and fails if it can not open it."
#-------It is assumed that stat1 is at least 3 characters long
        di, why = opFile1(un, ext, stat, pro, desc)
  if di != None: return di
        stat = stat.lower().strip()
        if stat[:3] == 'opt': return {ext:None}   # Optional data
  raise IOError, why


def opFile1(un, ext, stat1, pro, desc):
      "Opens file immediatly."
      stat = stat1[:3].strip().lower()
      fr, why = _opFile1(pro+"."+ext, stat)   # Try to open file
      if fr == None: return None, why
      import openfile
      file1 = Struct()
      file1.ext = ext; file1.stat = stat; file1.desc = desc; file1.iPro = 0
      file1.linesf = 0             # It signals that the file unit is used
      file1.fun = fr
      openfile.files1.append(file1)
      return {ext:fr}, None

#===========================================================================

def openFiles1():
      "Tries to open the requested files."
      nPro = prothem1(); pro = [0,0]
      nProm = filmed.openFileMed(pro, nPro)
      if nProm == None:
          openfileMhn(nPro)
          if nPro == 1:
              pro[0] = openfilepro(DLPREFIX, 0)
          else:
              pro[0] = openfilepro(DLPREFI1, 0)
              pro[1] = openfilepro(DLPREFI2, prothem1Opt(1))
          filmed.openFileWrmed(nPro, pro)    # Gets ready for errors
          openFileOpen(pro)
          openFilePar(0, 0)                  #     
          filmed.openFileWrmed(nPro, pro)    # Include 
      else:
          filmed.openFileWrmed(nProm, pro)   # Gets ready for errors
          openFileOpen(pro)
          filmed.openFileWrmed(nProm, pro)   # Include 
      return dict([(file1.ext, file1.fun) for file1 in files1])

#===========================================================================

def openfileMhn(nPro):
      "Prints message for the user."
      if dispLogo: print "%s\n========================" % ffff.gggg(DLLOGOST) #  
      prg("\n\n %s\n%s" % (descp, "-"*(len(descp)+2)))    #   
      openFilePar(lang, 0)                                #      

      prg("\n".join(("", DLMES01, DLMES02)))                          # Files composed by prefix, suffix
      if nPro == 1: prg("\n".join((DLMES03, DLMES04, ""))) # Example for 1 prefix
      else:         prg("\n".join((DLMES05, DLMES04, ""))) # Example for 2 prefixes

#-----      

      n = max([len(file1.desc) for file1 in files1])          #    
      form = "%s.%s: FILE %-" + str(n) + "s %s"
      for file1 in files1:
          ded = DLFILDAT                                    # data
          if file1.stat != 'old': ded = DLFILRES            # results
          if file1.stat == 'opt': ded = DLFILOPT            # optional
          i = abs(file1.iPro)
          if file1.iPro > 0:
              prg(form % (ppro[i-1], file1.ext, file1.desc, ded))
      print "\n"

#===========================================================================

def openfilepro(mes, icod):
      """      .
       icod=0        .
       icod=1  .
      """
      while True:
          pro = path(raw_input(mes).strip())
          if pro == '' and icod == 0: continue
          if pro == '': return pro
    if pro.ext in ("", "."): return pro.parent / pro.namebase
          prg(DLNOSUF)          # Do not append a suffix to the prefix!

#===========================================================================

def openFileOpen(pro):
      "Open all the requested files."

#----- 

      for file1 in files1:
          i = abs(file1.iPro)
          if len(pro[i-1]) > 0:                         # Check if prefix is optional
              filnam = pro[i-1] + "." + file1.ext

              file1.fun = _opFile1e(filnam, file1.stat)
    else:
              file1.fun = None

#-----  files    
#       batch file.

      for file1 in files1:
          if  file1.iPro < 0 and file1.fun != None: file1.fun.close(); file1.fun = None

#===========================================================================

def prothem1():
      "     "
      nPro = 1
      for file1 in files1:
          i1 = abs(file1.iPro)
          if i1 > nPro: nPro = i1
      return nPro

#===========================================================================

def prothem1Opt(iPro):
      "     optional."
      for file1 in files1:
          if abs(file1.iPro)-1 == iPro:
              if file1.stat != 'opt': return 0    # not optional
      return 1                                    # optional

def closeFiles1():
    for file1 in files1:
        if file1.fun != None: file1.fun.close()
    filmed.okMedFile1()

def stopErr1():
    for file1 in files1: file1.fun.close()
    filmed.errMedFile1()

def _opFile1(filnam1, stat1):
      stat = stat1.lower().strip()
      if stat == '':          stat = 'w'    # unknown -> write
      elif stat[:3] == 'old': stat = 'r'    # read
      elif stat[:3] == 'app': stat = 'a'    # append
      elif stat[:3] == 'opt': stat = 'r'    # Optional data
      try: return open(filnam1, stat), None # Try to open file
      except IOError, why: return None, why

def _opFile1e(filnam1, stat1):
      "Opens a file with status stat1; fail if error."
      f, why = _opFile1(filnam1, stat1)
      if f != None: return f
      stat1 = stat1.lower().strip()
      if stat1[:3] == 'opt': return f       # Optional data
      prg("%s: %s" % (filnam1, DLFILACC))
      sys.exit(1)
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