80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/*
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* Copyright (c) 2012-2013 Spotify AB
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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#ifndef ENDIANTOOLS_H_INCLUDED
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#define ENDIANTOOLS_H_INCLUDED
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#include <stdio.h>
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#include <unistd.h>
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#include <stdint.h>
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#include "sparkey.h"
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typedef union {
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uint32_t i;
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uint8_t c[4];
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} endian_union;
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/**
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* Writes count bytes of buf to a file with file descriptor fd
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* @param fd file descriptor of a file to write to.
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* @param buf bytes to write to file.
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* Must point to a block of memory at least count long.
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* @param count number of bytes to write.
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* @returns SPARKEY_SUCCESS if all goes well, otherwise a sparkey error code.
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*/
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sparkey_returncode write_full(int fd, uint8_t *buf, size_t count);
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/**
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* Write a 32 bit value to buf in little endian.
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* @param buf buf to write to. Must be at least 4 bytes long.
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* @param value the value to write.
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*/
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void write_little_endian32(uint8_t *buf, uint32_t value);
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/**
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* Write a 32 bit value to file in little endian.
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* @param fd file descriptor of file open for write.
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* @param value the value to write.
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* @returns SPARKEY_SUCCESS if all goes well, a sparkey error if the
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* writing to file fails.
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*/
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sparkey_returncode fwrite_little_endian32(int fd, uint32_t value);
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/**
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* Write a 64 bit value to buf in little endian.
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* @param buf buf to write to. Must be at least 8 bytes long.
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* @param value the value to write.
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*/
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void write_little_endian64(uint8_t *buf, uint64_t value);
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/**
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* Write a 64 bit value to file in little endian.
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* @param fd file descriptor of file open for write.
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* @param value the value to write.
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* @returns SPARKEY_SUCCESS if all goes well, a sparkey error if the
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* writing to file fails.
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*/
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sparkey_returncode fwrite_little_endian64(int fd, uint64_t value);
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uint32_t read_little_endian32(const uint8_t * array, uint64_t pos);
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uint64_t read_little_endian64(const uint8_t * array, uint64_t pos);
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sparkey_returncode correct_endian_platform();
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sparkey_returncode fread_little_endian32(FILE *fp, uint32_t *res);
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sparkey_returncode fread_little_endian64(FILE *fp, uint64_t *res);
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#endif /* ENDIAN_H_INCLUDED */
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