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Diffstat (limited to 'src/arpa/inet/ntohl.c')
-rw-r--r-- | src/arpa/inet/ntohl.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/arpa/inet/ntohl.c b/src/arpa/inet/ntohl.c new file mode 100644 index 0000000..8eb5a3d --- /dev/null +++ b/src/arpa/inet/ntohl.c @@ -0,0 +1,42 @@ +/** + * slibc — Yet another C library + * Copyright © 2015 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <arpa/inet.h> + + +/** + * Convert a 32-bit quantity from network byte order + * (little endian) to host byte order. + * + * @etymology (N)etwork byte order (to) (h)ost byte order, (l)ong. + * + * @param value A 32-bit quantity to convert. + * @return The value in host byte order. + * + * @since Always. + */ +uint32_t _ntohl(uint32_t value) +{ + unsigned char* v = (unsigned char*)&value; + uint32_t rc = 0; + rc |= (uint32_t)(v[0]) << 24; + rc |= (uint32_t)(v[1]) << 16; + rc |= (uint32_t)(v[2]) << 8; + rc |= (uint32_t)(v[3]) << 0; + return rc; +} + |