90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
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/****************************************************************************
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Copyright(c) 2019 by Aerospace C.Power (Chongqing) Microelectronics. ALL RIGHTS RESERVED.
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This Information is proprietary to Aerospace C.Power (Chongqing) Microelectronics and MAY NOT
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be copied by any method or incorporated into another program without
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the express written consent of Aerospace C.Power. This Information or any portion
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thereof remains the property of Aerospace C.Power. The Information contained herein
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is believed to be accurate and Aerospace C.Power assumes no responsibility or
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liability for its use in any way and conveys no license or title under
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any patent or copyright and makes no representation or warranty that this
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Information is free from patent or copyright infringement.
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****************************************************************************/
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#include "os_types.h"
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#define BIG_LITTLE_ENDIAN_SWAP16(a) ((((uint16_t)(a) & 0xff00) >> 8) | \
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(((uint16_t)(a) & 0x00ff) << 8))
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#define BIG_LITTLE_ENDIAN_SWAP32(a) ((((uint32_t)(a) & 0xff000000) >> 24)| \
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(((uint32_t)(a) & 0x00ff0000) >> 8) | \
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(((uint32_t)(a) & 0x0000ff00) << 8) | \
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(((uint32_t)(a) & 0x000000ff) << 24))
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#define LITTLE_ENDIAN 0
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#define BIG_ENDIAN 1
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#define UNKNOWN_ENDIAN 0xffffffff
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static uint32_t g_cpu_endian = UNKNOWN_ENDIAN;
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/*
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* check_cpu_endian() - check cpu's endianess
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* return:
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- 1 bigendian
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- 0 little endian
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*/
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static uint32_t inline check_cpu_endian()
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{
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union{
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uint32_t i;
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uint8_t s[4];
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}c;
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c.i = 0x12345678;
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return (0x12 == c.s[0]);
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}
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uint32_t iot_htonl(uint32_t h)
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{
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if(g_cpu_endian == UNKNOWN_ENDIAN){
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g_cpu_endian = check_cpu_endian();
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}
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return (g_cpu_endian == BIG_ENDIAN)? h : BIG_LITTLE_ENDIAN_SWAP32(h);
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}
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uint32_t iot_ntohl(uint32_t n)
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{
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if(g_cpu_endian == UNKNOWN_ENDIAN){
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g_cpu_endian = check_cpu_endian();
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}
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return (g_cpu_endian == BIG_ENDIAN) ? n : BIG_LITTLE_ENDIAN_SWAP32(n);
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}
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uint16_t iot_htons(uint16_t h)
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{
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if(g_cpu_endian == UNKNOWN_ENDIAN){
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g_cpu_endian = check_cpu_endian();
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}
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return (g_cpu_endian == BIG_ENDIAN) ? h : BIG_LITTLE_ENDIAN_SWAP16(h);
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}
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uint16_t iot_ntohs(uint16_t n)
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{
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if(g_cpu_endian == UNKNOWN_ENDIAN){
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g_cpu_endian = check_cpu_endian();
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}
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return (g_cpu_endian == BIG_ENDIAN) ? n : BIG_LITTLE_ENDIAN_SWAP16(n);
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}
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uint64_t iot_htonll(uint64_t h)
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{
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return (((uint64_t) iot_htonl((uint32_t)h)) << 32) + iot_htonl(h >> 32);
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}
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uint64_t iot_ntohll(uint64_t n)
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{
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return (((uint64_t) iot_ntohl((uint32_t)n)) << 32) + iot_ntohl(n >> 32);
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}
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