coreboot-kgpe-d16/util/cbfstool/xdr.c

157 lines
3.2 KiB
C

/*
* cbfstool, CLI utility for CBFS file manipulation
*
* Copyright 2013 Google Inc.
*
* This program 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; version 2 of the License.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <stdint.h>
#include "common.h"
size_t bgets(struct buffer *input, void *output, size_t len)
{
len = input->size < len ? input->size : len;
memmove(output, input->data, len);
input->data += len;
input->size -= len;
return len;
}
size_t bputs(struct buffer *b, const void *data, size_t len)
{
memmove(&b->data[b->size], data, len);
b->size += len;
return len;
}
/* The assumption in all this code is that we're given a pointer to enough data.
* Hence, we do not check for underflow.
*/
static uint8_t get8(struct buffer *input)
{
uint8_t ret = *input->data++;
input->size--;
return ret;
}
static uint16_t get16be(struct buffer *input)
{
uint16_t ret;
ret = get8(input) << 8;
ret |= get8(input);
return ret;
}
static uint32_t get32be(struct buffer *input)
{
uint32_t ret;
ret = get16be(input) << 16;
ret |= get16be(input);
return ret;
}
static uint64_t get64be(struct buffer *input)
{
uint64_t ret;
ret = get32be(input);
ret <<= 32;
ret |= get32be(input);
return ret;
}
static void put8(struct buffer *input, uint8_t val)
{
input->data[input->size] = val;
input->size++;
}
static void put16be(struct buffer *input, uint16_t val)
{
put8(input, val >> 8);
put8(input, val);
}
static void put32be(struct buffer *input, uint32_t val)
{
put16be(input, val >> 16);
put16be(input, val);
}
static void put64be(struct buffer *input, uint64_t val)
{
put32be(input, val >> 32);
put32be(input, val);
}
static uint16_t get16le(struct buffer *input)
{
uint16_t ret;
ret = get8(input);
ret |= get8(input) << 8;
return ret;
}
static uint32_t get32le(struct buffer *input)
{
uint32_t ret;
ret = get16le(input);
ret |= get16le(input) << 16;
return ret;
}
static uint64_t get64le(struct buffer *input)
{
uint64_t ret;
uint32_t low;
low = get32le(input);
ret = get32le(input);
ret <<= 32;
ret |= low;
return ret;
}
static void put16le(struct buffer *input, uint16_t val)
{
put8(input, val);
put8(input, val >> 8);
}
static void put32le(struct buffer *input, uint32_t val)
{
put16le(input, val);
put16le(input, val >> 16);
}
static void put64le(struct buffer *input, uint64_t val)
{
put32le(input, val);
put32le(input, val >> 32);
}
struct xdr xdr_be = {
get8, get16be, get32be, get64be,
put8, put16be, put32be, put64be
};
struct xdr xdr_le = {
get8, get16le, get32le, get64le,
put8, put16le, put32le, put64le
};