130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/*
|
|
* 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>
|
|
*
|
|
* 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>
|
|
|
|
/*
|
|
* A variable name is 1 character long and case sensitive. So
|
|
* we actually have 52 (26*2) possible variables.
|
|
*/
|
|
#define MAX_VARIABLES (26<<1)
|
|
#define MAX_VARIABLE_LENGTH 128
|
|
#define VAR_IDX(a) (((a) >= 'a' && (a) <= 'z') ? 26-'a'+(a) : (a)-'A')
|
|
#define IDX_VAR(i) ((i) < 26 ? 'A'+(i) : 'a'+ ((i)-26))
|
|
|
|
typedef struct {
|
|
CHAR16 value[MAX_VARIABLE_LENGTH];
|
|
} elilo_var_t;
|
|
|
|
static elilo_var_t vars[MAX_VARIABLES]; /* set of variables */
|
|
|
|
INTN
|
|
set_var(CHAR16 v, CHAR16 *value)
|
|
{
|
|
/* invalid variable name */
|
|
if (v < 'A' || (v > 'Z' && v < 'a') || v > 'z') return -1;
|
|
|
|
StrCpy(vars[VAR_IDX(v)].value, value);
|
|
return 0;
|
|
}
|
|
|
|
CHAR16 *
|
|
get_var(CHAR16 v)
|
|
{
|
|
/* invalid variable name */
|
|
if (v < L'A' || (v > L'Z' && v < L'a') || v > L'z') return NULL;
|
|
|
|
return vars[VAR_IDX(v)].value;
|
|
}
|
|
|
|
|
|
VOID
|
|
print_vars(VOID)
|
|
{
|
|
INTN i;
|
|
UINTN cnt = 0;
|
|
|
|
for(i=0; i < MAX_VARIABLES; i++) {
|
|
if (vars[i].value[0]) {
|
|
cnt++;
|
|
Print(L"%c = \"%s\"\n", IDX_VAR(i), vars[i].value);
|
|
}
|
|
}
|
|
if (cnt == 0) Print(L"no variable defined\n");
|
|
}
|
|
|
|
|
|
INTN
|
|
subst_vars(CHAR16 *in, CHAR16 *out, INTN maxlen)
|
|
{
|
|
/*
|
|
* we cannot use \\ for the despecialization character because
|
|
* it is also used as a path separator in EFI.
|
|
*/
|
|
#define DSPEC_CHAR L'&'
|
|
INTN i, l, j, cnt;
|
|
INTN m = 0, d = 0;
|
|
CHAR16 *val;
|
|
|
|
if (in == NULL || out == NULL || maxlen <= 1) return -1;
|
|
|
|
l = StrLen(in);
|
|
|
|
maxlen--;
|
|
|
|
for (i=0, j=0;i < l; i++) {
|
|
cnt = 1;
|
|
val = in+i;
|
|
|
|
if (*val == DSPEC_CHAR && d == 0) {
|
|
d = 1;
|
|
continue;
|
|
}
|
|
if(m == 1) {
|
|
m = 0;
|
|
val = get_var(*val);
|
|
|
|
if (val == NULL) continue;
|
|
|
|
cnt = StrLen(val);
|
|
|
|
} else if (*val == L'%' && d == 0) {
|
|
m = 1;
|
|
continue;
|
|
}
|
|
d = 0;
|
|
while (j < maxlen && cnt) {
|
|
out[j++] = *val++;
|
|
cnt--;
|
|
}
|
|
if (j == maxlen) break;
|
|
}
|
|
out[j] = CHAR_NULL;
|
|
|
|
return 0;
|
|
}
|