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

1.1       root        1: /* cmdlin.c
                      2:    Parse a command line.
                      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_cmdlin_rcsid[] = "$Id: cmdlin.c,v 1.1 93/07/30 08:07:05 bin Exp Locker: bin $";
                     30: #endif
                     31: 
                     32: #include <errno.h>
                     33: #include <ctype.h>
                     34: 
                     35: /* Parse a command line into fields and process it via a command
                     36:    table.  The command table functions may keep the memory allocated
                     37:    for the line, but they may not keep the memory allocated for the
                     38:    argv list.  This function strips # comments.  */
                     39: 
                     40: #define CSTACK (16)
                     41: 
                     42: int
                     43: uuconf_cmd_line (pglobal, zline, qtab, pinfo, pfiunknown, iflags, pblock)
                     44:      pointer pglobal;
                     45:      char *zline;
                     46:      const struct uuconf_cmdtab *qtab;
                     47:      pointer pinfo;
                     48:      int (*pfiunknown) P((pointer, int, char **, pointer, pointer));
                     49:      int iflags;
                     50:      pointer pblock;
                     51: {
                     52:   struct sglobal *qglobal = (struct sglobal *) pglobal;
                     53:   char *z;
                     54:   int cargs;
                     55:   char *azargs[CSTACK];
                     56:   char **pzargs;
                     57:   int iret;
                     58: 
                     59:   /* Any # not preceeded by a backslash starts a comment.  */
                     60:   z = zline;
                     61:   while ((z = strchr (z, '#')) != NULL)
                     62:     {
                     63:       if (z == zline || *(z - 1) != '\\')
                     64:        {
                     65:          *z = '\0';
                     66:          break;
                     67:        }
                     68:       /* Remove the backslash.  */
                     69:       while ((*(z - 1) = *z) != '\0')
                     70:        ++z;
                     71:     }
                     72: 
                     73:   /* Parse the first CSTACK arguments by hand to avoid malloc.  */
                     74: 
                     75:   z = zline;
                     76:   cargs = 0;
                     77:   pzargs = azargs;
                     78:   while (TRUE)
                     79:     {
                     80:       while (*z != '\0' && isspace (BUCHAR (*z)))
                     81:        ++z;
                     82: 
                     83:       if (*z == '\0')
                     84:        break;
                     85: 
                     86:       if (cargs >= CSTACK)
                     87:        {
                     88:          char **pzsplit;
                     89:          size_t csplit;
                     90:          int cmore;
                     91: 
                     92:          pzsplit = NULL;
                     93:          csplit = 0;
                     94:          cmore = _uuconf_istrsplit (z, '\0', &pzsplit, &csplit);
                     95:          if (cmore < 0)
                     96:            {
                     97:              qglobal->ierrno = errno;
                     98:              return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
                     99:            }
                    100: 
                    101:          pzargs = (char **) malloc ((cmore + CSTACK) * sizeof (char *));
                    102:          if (pzargs == NULL)
                    103:            {
                    104:              qglobal->ierrno = errno;
                    105:              free ((pointer) pzsplit);
                    106:              return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
                    107:            }
                    108: 
                    109:          memcpy ((pointer) pzargs, (pointer) azargs,
                    110:                  CSTACK * sizeof (char *));
                    111:          memcpy ((pointer) (pzargs + CSTACK), (pointer) pzsplit,
                    112:                  cmore * sizeof (char *));
                    113:          cargs = cmore + CSTACK;
                    114: 
                    115:          free ((pointer) pzsplit);
                    116: 
                    117:          break;
                    118:        }
                    119: 
                    120:       azargs[cargs] = z;
                    121:       ++cargs;
                    122: 
                    123:       while (*z != '\0' && ! isspace (BUCHAR (*z)))
                    124:        z++;
                    125: 
                    126:       if (*z == '\0')
                    127:        break;
                    128: 
                    129:       *z++ = '\0';
                    130:     }
                    131: 
                    132:   if (cargs <= 0)
                    133:     return UUCONF_CMDTABRET_CONTINUE;
                    134: 
                    135:   iret = uuconf_cmd_args (pglobal, cargs, pzargs, qtab, pinfo, pfiunknown,
                    136:                          iflags, pblock);
                    137: 
                    138:   if (pzargs != azargs)
                    139:     free ((pointer) pzargs);
                    140: 
                    141:   return iret;
                    142: }

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