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Annotation of coherent/g/usr/lib/uucp/tay104/uuconf/ugtlin.c, revision 1.1.1.1

1.1       root        1: /* ugtlin.c
                      2:    Read a line with backslash continuations.
                      3: 
                      4:    Copyright (C) 1992 Ian Lance Taylor
                      5: 
                      6:    This file is part of the Taylor UUCP uuconf library.
                      7: 
                      8:    This library is free software; you can redistribute it and/or
                      9:    modify it under the terms of the GNU Library General Public License
                     10:    as published by the Free Software Foundation; either version 2 of
                     11:    the License, or (at your option) any later version.
                     12: 
                     13:    This library is distributed in the hope that it will be useful, but
                     14:    WITHOUT ANY WARRANTY; without even the implied warranty of
                     15:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     16:    Library General Public License for more details.
                     17: 
                     18:    You should have received a copy of the GNU Library General Public
                     19:    License along with this library; if not, write to the Free Software
                     20:    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
                     21: 
                     22:    The author of the program may be contacted at [email protected] or
                     23:    c/o Infinity Development Systems, P.O. Box 520, Waltham, MA 02254.
                     24:    */
                     25: 
                     26: #include "uucnfi.h"
                     27: 
                     28: #if USE_RCS_ID
                     29: const char _uuconf_ugtlin_rcsid[] = "$Id: ugtlin.c,v 1.1 93/07/30 08:08:12 bin Exp Locker: bin $";
                     30: #endif
                     31: 
                     32: /* Read a line from a file with backslash continuations.  This updates
                     33:    the qglobal->ilineno count for each additional line it reads.  */
                     34: 
                     35: int
                     36: _uuconf_getline (qglobal, pzline, pcline, e)
                     37:      struct sglobal *qglobal;
                     38:      char **pzline;
                     39:      size_t *pcline;
                     40:      FILE *e;
                     41: {
                     42:   int ctot;
                     43:   char *zline;
                     44:   size_t cline;
                     45: 
                     46:   ctot = -1;
                     47: 
                     48:   zline = NULL;
                     49:   cline = 0;
                     50: 
                     51:   while (TRUE)
                     52:     {
                     53:       int cchars;
                     54: 
                     55:       if (ctot < 0)
                     56:        cchars = getline (pzline, pcline, e);
                     57:       else
                     58:        cchars = getline (&zline, &cline, e);
                     59:       if (cchars < 0)
                     60:        {
                     61:          if (zline != NULL)
                     62:            free ((pointer) zline);
                     63:          if (ctot >= 0)
                     64:            return ctot;
                     65:          else
                     66:            return cchars;
                     67:        }
                     68: 
                     69:       if (ctot < 0)
                     70:        ctot = cchars;
                     71:       else
                     72:        {
                     73:          if (*pcline <= ctot + cchars)
                     74:            {
                     75:              char *znew;
                     76: 
                     77:              if (*pcline > 0)
                     78:                znew = (char *) realloc ((pointer) *pzline,
                     79:                                         (size_t) (ctot + cchars + 1));
                     80:              else
                     81:                znew = (char *) malloc ((size_t) (ctot + cchars + 1));
                     82:              if (znew == NULL)
                     83:                {
                     84:                  free ((pointer) zline);
                     85:                  return -1;
                     86:                }
                     87:              *pzline = znew;
                     88:              *pcline = ctot + cchars + 1;
                     89:            }
                     90: 
                     91:          memcpy ((pointer) ((*pzline) + ctot), (pointer) zline,
                     92:                  (size_t) (cchars + 1));
                     93:          ctot += cchars;
                     94:        }
                     95: 
                     96:       if (ctot < 2
                     97:          || (*pzline)[ctot - 1] != '\n'
                     98:          || (*pzline)[ctot - 2] != '\\')
                     99:        {
                    100:          if (zline != NULL)
                    101:            free ((pointer) zline);
                    102:          return ctot;
                    103:        }
                    104: 
                    105:       ++qglobal->ilineno;
                    106: 
                    107:       ctot -= 2;
                    108:       (*pzline)[ctot] = '\0';
                    109:     }
                    110: }

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