Mercurial > projects > libpws
diff compat/endian.c @ 0:d541e748cfd8
Initial revision
author | Guido Berhoerster <guido+libpws@berhoerster.name> |
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date | Tue, 10 Feb 2015 11:29:54 +0100 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/compat/endian.c Tue Feb 10 11:29:54 2015 +0100 @@ -0,0 +1,93 @@ +/* + * Copyright (C) 2015 Guido Berhoerster <guido+pws@berhoerster.name> + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY + * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include <arpa/inet.h> + +#include "pws-compat.h" +#include "endian.h" + +uint16_t +le16toh(uint16_t little16) +{ + unsigned char *b = (unsigned char *)&little16; + + return ((b[0] << 0) | (b[1] << 8)); +} + +uint16_t +htole16(uint16_t host16) +{ + uint16_t little16; + unsigned char *b = (unsigned char *)&little16; + + b[0] = (unsigned char)(host16 >> 0); + b[1] = (unsigned char)(host16 >> 8); + + return (little16); +} + +uint32_t +le32toh(uint32_t little32) +{ + unsigned char *b = (unsigned char *)&little32; + + return ((b[0] << 0) | (b[1] << 8) | (b[2] << 16) | (b[3] << 24)); +} + +uint32_t +htole32(uint32_t host32) +{ + uint32_t little32; + unsigned char *b = (unsigned char *)&little32; + + b[0] = (unsigned char)(host32 >> 0); + b[1] = (unsigned char)(host32 >> 8); + b[2] = (unsigned char)(host32 >> 16); + b[3] = (unsigned char)(host32 >> 24); + + return (little32); +} + +uint16_t +be16toh(uint16_t big16) +{ + return (ntohs(big16)); +} + +uint16_t +htobe16(uint16_t host16) +{ + return (htons(host16)); +} + +uint32_t +be32toh(uint32_t big32) +{ + return (ntohl(big32)); +} + +uint32_t +htobe32(uint32_t host32) +{ + return (htonl(host32)); +}