146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/* cmdlin.c
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Parse a command line.
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Copyright (C) 1992 Ian Lance Taylor
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This file is part of the Taylor UUCP uuconf library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License
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as published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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The author of the program may be contacted at ian@airs.com or
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c/o Cygnus Support, Building 200, 1 Kendall Square, Cambridge, MA 02139.
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*/
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#include "uucnfi.h"
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#if USE_RCS_ID
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const char _uuconf_cmdlin_rcsid[] = "$Id: cmdlin.c,v 1.2 1994/05/07 18:12:04 ache Exp $";
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#endif
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#include <errno.h>
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#include <ctype.h>
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/* Parse a command line into fields and process it via a command
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table. The command table functions may keep the memory allocated
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for the line, but they may not keep the memory allocated for the
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argv list. This function strips # comments. */
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#define CSTACK (16)
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int
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uuconf_cmd_line (pglobal, zline, qtab, pinfo, pfiunknown, iflags, pblock)
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pointer pglobal;
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char *zline;
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const struct uuconf_cmdtab *qtab;
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pointer pinfo;
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int (*pfiunknown) P((pointer, int, char **, pointer, pointer));
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int iflags;
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pointer pblock;
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{
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struct sglobal *qglobal = (struct sglobal *) pglobal;
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char *z;
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int cargs;
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char *azargs[CSTACK];
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char **pzargs;
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int iret;
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if ((iflags & UUCONF_CMDTABFLAG_NOCOMMENTS) == 0)
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{
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/* Any # not preceeded by a backslash starts a comment. */
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z = zline;
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while ((z = strchr (z, '#')) != NULL)
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{
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if (z == zline || *(z - 1) != '\\')
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{
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*z = '\0';
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break;
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}
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/* Remove the backslash. */
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while ((*(z - 1) = *z) != '\0')
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++z;
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}
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}
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/* Parse the first CSTACK arguments by hand to avoid malloc. */
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z = zline;
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cargs = 0;
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pzargs = azargs;
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while (TRUE)
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{
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while (*z != '\0' && isspace (BUCHAR (*z)))
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++z;
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if (*z == '\0')
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break;
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if (cargs >= CSTACK)
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{
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char **pzsplit;
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size_t csplit;
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int cmore;
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pzsplit = NULL;
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csplit = 0;
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cmore = _uuconf_istrsplit (z, '\0', &pzsplit, &csplit);
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if (cmore < 0)
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{
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qglobal->ierrno = errno;
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return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
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}
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pzargs = (char **) malloc ((cmore + CSTACK) * sizeof (char *));
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if (pzargs == NULL)
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{
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qglobal->ierrno = errno;
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free ((pointer) pzsplit);
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return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
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}
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memcpy ((pointer) pzargs, (pointer) azargs,
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CSTACK * sizeof (char *));
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memcpy ((pointer) (pzargs + CSTACK), (pointer) pzsplit,
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cmore * sizeof (char *));
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cargs = cmore + CSTACK;
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free ((pointer) pzsplit);
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break;
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}
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azargs[cargs] = z;
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++cargs;
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while (*z != '\0' && ! isspace (BUCHAR (*z)))
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z++;
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if (*z == '\0')
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break;
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*z++ = '\0';
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}
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if (cargs <= 0)
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return UUCONF_CMDTABRET_CONTINUE;
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iret = uuconf_cmd_args (pglobal, cargs, pzargs, qtab, pinfo, pfiunknown,
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iflags, pblock);
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if (pzargs != azargs)
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free ((pointer) pzargs);
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return iret;
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}
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