63 lines
2 KiB
C
63 lines
2 KiB
C
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include "utils.h"
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/** Write a 4-byte value to f in little-endian order. */
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void Write4(int value, FILE* f) {
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fputc(value & 0xff, f);
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fputc((value >> 8) & 0xff, f);
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fputc((value >> 16) & 0xff, f);
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fputc((value >> 24) & 0xff, f);
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}
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/** Write an 8-byte value to f in little-endian order. */
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void Write8(long long value, FILE* f) {
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fputc(value & 0xff, f);
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fputc((value >> 8) & 0xff, f);
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fputc((value >> 16) & 0xff, f);
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fputc((value >> 24) & 0xff, f);
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fputc((value >> 32) & 0xff, f);
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fputc((value >> 40) & 0xff, f);
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fputc((value >> 48) & 0xff, f);
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fputc((value >> 56) & 0xff, f);
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}
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int Read2(unsigned char* p) {
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return (int)(((unsigned int)p[1] << 8) |
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(unsigned int)p[0]);
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}
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int Read4(unsigned char* p) {
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return (int)(((unsigned int)p[3] << 24) |
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((unsigned int)p[2] << 16) |
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((unsigned int)p[1] << 8) |
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(unsigned int)p[0]);
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}
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long long Read8(unsigned char* p) {
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return (long long)(((unsigned long long)p[7] << 56) |
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((unsigned long long)p[6] << 48) |
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((unsigned long long)p[5] << 40) |
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((unsigned long long)p[4] << 32) |
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((unsigned long long)p[3] << 24) |
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((unsigned long long)p[2] << 16) |
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((unsigned long long)p[1] << 8) |
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(unsigned long long)p[0]);
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}
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