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/* cmdlin.c
Parse a command line.
Copyright (C) 1992 Ian Lance Taylor
This file is part of the Taylor UUCP uuconf library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License
as published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The author of the program may be contacted at ian@airs.com or
c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144.
*/
#include "uucnfi.h"
#if USE_RCS_ID
const char _uuconf_cmdlin_rcsid[] = "$Id: cmdlin.c,v 1.6 1995/06/21 19:21:55 ian Rel $";
#endif
#include <errno.h>
#include <ctype.h>
/* Parse a command line into fields and process it via a command
table. The command table functions may keep the memory allocated
for the line, but they may not keep the memory allocated for the
argv list. This function strips # comments. */
#define CSTACK (16)
int
uuconf_cmd_line (pglobal, zline, qtab, pinfo, pfiunknown, iflags, pblock)
pointer pglobal;
char *zline;
const struct uuconf_cmdtab *qtab;
pointer pinfo;
int (*pfiunknown) P((pointer, int, char **, pointer, pointer));
int iflags;
pointer pblock;
{
struct sglobal *qglobal = (struct sglobal *) pglobal;
char *z;
int cargs;
char *azargs[CSTACK];
char **pzargs;
int iret;
if ((iflags & UUCONF_CMDTABFLAG_NOCOMMENTS) == 0)
{
/* Any # not preceeded by a backslash starts a comment. */
z = zline;
while ((z = strchr (z, '#')) != NULL)
{
if (z == zline || *(z - 1) != '\\')
{
*z = '\0';
break;
}
/* Remove the backslash. */
while ((*(z - 1) = *z) != '\0')
++z;
}
}
/* Parse the first CSTACK arguments by hand to avoid malloc. */
z = zline;
cargs = 0;
pzargs = azargs;
while (TRUE)
{
while (*z != '\0' && isspace (BUCHAR (*z)))
++z;
if (*z == '\0')
break;
if (cargs >= CSTACK)
{
char **pzsplit;
size_t csplit;
int cmore;
pzsplit = NULL;
csplit = 0;
cmore = _uuconf_istrsplit (z, '\0', &pzsplit, &csplit);
if (cmore < 0)
{
qglobal->ierrno = errno;
return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
}
pzargs = (char **) malloc ((cmore + CSTACK) * sizeof (char *));
if (pzargs == NULL)
{
qglobal->ierrno = errno;
free ((pointer) pzsplit);
return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
}
memcpy ((pointer) pzargs, (pointer) azargs,
CSTACK * sizeof (char *));
memcpy ((pointer) (pzargs + CSTACK), (pointer) pzsplit,
cmore * sizeof (char *));
cargs = cmore + CSTACK;
free ((pointer) pzsplit);
break;
}
azargs[cargs] = z;
++cargs;
while (*z != '\0' && ! isspace (BUCHAR (*z)))
z++;
if (*z == '\0')
break;
*z++ = '\0';
}
if (cargs <= 0)
return UUCONF_CMDTABRET_CONTINUE;
iret = uuconf_cmd_args (pglobal, cargs, pzargs, qtab, pinfo, pfiunknown,
iflags, pblock);
if (pzargs != azargs)
free ((pointer) pzargs);
return iret;
}
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