diff options
Diffstat (limited to 'gnu-efi/gnu-efi-3.0/lib/argify.c')
| -rw-r--r-- | gnu-efi/gnu-efi-3.0/lib/argify.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/gnu-efi/gnu-efi-3.0/lib/argify.c b/gnu-efi/gnu-efi-3.0/lib/argify.c new file mode 100644 index 0000000..469a48b --- /dev/null +++ b/gnu-efi/gnu-efi-3.0/lib/argify.c @@ -0,0 +1,97 @@ + +/* + * 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; +} + |