157 lines
3.2 KiB
C
157 lines
3.2 KiB
C
/*
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* cbfstool, CLI utility for CBFS file manipulation
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*
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* Copyright 2013 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <stdint.h>
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#include "common.h"
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size_t bgets(struct buffer *input, void *output, size_t len)
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{
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len = input->size < len ? input->size : len;
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memmove(output, input->data, len);
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input->data += len;
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input->size -= len;
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return len;
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}
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size_t bputs(struct buffer *b, const void *data, size_t len)
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{
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memmove(&b->data[b->size], data, len);
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b->size += len;
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return len;
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}
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/* The assumption in all this code is that we're given a pointer to enough data.
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* Hence, we do not check for underflow.
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*/
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static uint8_t get8(struct buffer *input)
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{
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uint8_t ret = *input->data++;
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input->size--;
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return ret;
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}
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static uint16_t get16be(struct buffer *input)
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{
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uint16_t ret;
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ret = get8(input) << 8;
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ret |= get8(input);
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return ret;
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}
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static uint32_t get32be(struct buffer *input)
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{
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uint32_t ret;
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ret = get16be(input) << 16;
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ret |= get16be(input);
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return ret;
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}
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static uint64_t get64be(struct buffer *input)
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{
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uint64_t ret;
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ret = get32be(input);
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ret <<= 32;
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ret |= get32be(input);
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return ret;
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}
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static void put8(struct buffer *input, uint8_t val)
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{
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input->data[input->size] = val;
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input->size++;
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}
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static void put16be(struct buffer *input, uint16_t val)
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{
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put8(input, val >> 8);
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put8(input, val);
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}
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static void put32be(struct buffer *input, uint32_t val)
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{
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put16be(input, val >> 16);
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put16be(input, val);
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}
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static void put64be(struct buffer *input, uint64_t val)
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{
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put32be(input, val >> 32);
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put32be(input, val);
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}
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static uint16_t get16le(struct buffer *input)
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{
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uint16_t ret;
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ret = get8(input);
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ret |= get8(input) << 8;
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return ret;
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}
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static uint32_t get32le(struct buffer *input)
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{
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uint32_t ret;
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ret = get16le(input);
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ret |= get16le(input) << 16;
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return ret;
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}
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static uint64_t get64le(struct buffer *input)
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{
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uint64_t ret;
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uint32_t low;
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low = get32le(input);
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ret = get32le(input);
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ret <<= 32;
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ret |= low;
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return ret;
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}
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static void put16le(struct buffer *input, uint16_t val)
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{
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put8(input, val);
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put8(input, val >> 8);
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}
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static void put32le(struct buffer *input, uint32_t val)
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{
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put16le(input, val);
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put16le(input, val >> 16);
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}
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static void put64le(struct buffer *input, uint64_t val)
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{
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put32le(input, val);
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put32le(input, val >> 32);
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}
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struct xdr xdr_be = {
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get8, get16be, get32be, get64be,
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put8, put16be, put32be, put64be
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};
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struct xdr xdr_le = {
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get8, get16le, get32le, get64le,
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put8, put16le, put32le, put64le
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};
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