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/* Copyright 2015 Baruch Even
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef LIBSCSICMD_UTILS_H
#define LIBSCSICMD_UTILS_H
#include <stdint.h>
static inline uint16_t get_uint16(unsigned char *buf, int start)
{
return (uint16_t)buf[start] << 8 |
(uint16_t)buf[start+1];
}
static inline uint32_t get_uint24(unsigned char *buf, int start)
{
return (uint32_t)buf[start] << 16 |
(uint32_t)buf[start+1] << 8 |
(uint32_t)buf[start+2];
}
static inline uint32_t get_uint32(unsigned char *buf, int start)
{
return (uint32_t)buf[start] << 24 |
(uint32_t)buf[start+1] << 16 |
(uint32_t)buf[start+2] << 8 |
(uint32_t)buf[start+3];
}
static inline uint64_t get_uint64(unsigned char *buf, int start)
{
return (uint64_t)buf[start] << 56 |
(uint64_t)buf[start+1] << 48 |
(uint64_t)buf[start+2] << 40 |
(uint64_t)buf[start+3] << 32 |
(uint64_t)buf[start+4] << 24 |
(uint64_t)buf[start+5] << 16 |
(uint64_t)buf[start+6] << 8 |
(uint64_t)buf[start+7];
}
static inline unsigned safe_len(uint8_t *start, unsigned len, uint8_t *subbuf, unsigned subbuf_len)
{
const int start_offset = subbuf - start;
if (start_offset < 0 || (unsigned)start_offset > len)
return 0;
if (subbuf_len + start_offset > len)
return len - start_offset;
else
return subbuf_len;
}
#endif
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