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/*
* Copyright (C) 2001-2003 Hewlett-Packard Co.
* Contributed by Stephane Eranian <eranian@hpl.hp.com>
*
* Copyright (C) 2001 Silicon Graphics, Inc.
* Contributed by Brent Casavant <bcasavan@sgi.com>
*
* Copyright (C) 2006-2009 Intel Corporation
* Contributed by Fenghua Yu <fenghua.yu@intel.com>
* Contributed by Bibo Mao <bibo.mao@intel.com>
* Contributed by Chandramouli Narayanan <mouli@linux.intel.com>
*
* This file is part of the ELILO, the EFI Linux boot loader.
*
* ELILO is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* ELILO 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with ELILO; see the file COPYING. If not, write to the Free
* Software Foundation, 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Please check out the elilo.txt for complete documentation on how
* to use this program.
*/
#include <efi.h>
#include <efilib.h>
#include <argify.h>
#define MAX_ARGS 256
#define CHAR_SPACE L' '
#define DEBUG 0
INTN
argify(CHAR16 *buf, UINTN len, CHAR16 **argv)
{
UINTN i=0, j=0;
CHAR16 *p = buf;
if (buf == 0) {
argv[0] = NULL;
return 0;
}
/* len represents the number of bytes, not the number of 16 bytes chars */
len = len >> 1;
/*
* Here we use CHAR_NULL as the terminator rather than the length
* because it seems like the EFI shell return rather bogus values for it.
* Apparently, we are guaranteed to find the '\0' character in the buffer
* where the real input arguments stop, so we use it instead.
*/
for(;;) {
while (buf[i] == CHAR_SPACE && buf[i] != CHAR_NULL && i < len) i++;
if (buf[i] == CHAR_NULL || i == len) goto end;
p = buf+i;
i++;
while (buf[i] != CHAR_SPACE && buf[i] != CHAR_NULL && i < len) i++;
argv[j++] = p;
if (buf[i] == CHAR_NULL) goto end;
buf[i] = CHAR_NULL;
if (i == len) goto end;
i++;
if (j == MAX_ARGS-1) {
Print(L"too many arguments (%d) truncating\n", j);
goto end;
}
}
end:
argv[j] = NULL;
return j;
}
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