diff options
Diffstat (limited to 'external/nettle-3.3/nettle/write-be32.c')
-rw-r--r-- | external/nettle-3.3/nettle/write-be32.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/external/nettle-3.3/nettle/write-be32.c b/external/nettle-3.3/nettle/write-be32.c new file mode 100644 index 0000000..7d68905 --- /dev/null +++ b/external/nettle-3.3/nettle/write-be32.c @@ -0,0 +1,77 @@ +/* write-be32.c + + Copyright (C) 2001 Niels Möller + + This file is part of GNU Nettle. + + GNU Nettle is free software: you can redistribute it and/or + modify it under the terms of either: + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your + option) any later version. + + or + + * 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. + + or both in parallel, as here. + + GNU Nettle 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 copies of the GNU General Public License and + the GNU Lesser General Public License along with this program. If + not, see http://www.gnu.org/licenses/. +*/ + +#if HAVE_CONFIG_H +# include "config.h" +#endif + +#include <stdlib.h> + +#include "nettle-write.h" + +#include "macros.h" + +void +_nettle_write_be32(size_t length, uint8_t *dst, + uint32_t *src) +{ + size_t i; + size_t words; + unsigned leftover; + + words = length / 4; + leftover = length % 4; + + for (i = 0; i < words; i++, dst += 4) + WRITE_UINT32(dst, src[i]); + + if (leftover) + { + uint32_t word; + unsigned j = leftover; + + word = src[i]; + + switch (leftover) + { + default: + abort(); + case 3: + dst[--j] = (word >> 8) & 0xff; + /* Fall through */ + case 2: + dst[--j] = (word >> 16) & 0xff; + /* Fall through */ + case 1: + dst[--j] = (word >> 24) & 0xff; + } + } +} |