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Diffstat (limited to 'lib/src/util/types.c')
-rw-r--r-- | lib/src/util/types.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/lib/src/util/types.c b/lib/src/util/types.c new file mode 100644 index 000000000..744192593 --- /dev/null +++ b/lib/src/util/types.c @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2021 Cisco and/or its affiliates. + * 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. + */ + +#include <hicn/util/types.h> + +uint32_t +htonf (float f) +{ + uint32_t i; + uint32_t sign = 0; + + if (f < 0) + { + sign = 1; + f = -f; + } + + // i[31] = sign bit + i = sign << 31; + + // i[30 to 16] = int(f)[14 to 0] + i |= (((uint32_t) f) & 0x7fff) << 16; + + // i[15 to 0] = fraction(f) bits [15 to 0] + i |= (uint32_t) ((f - (uint32_t) f) * 65536.0f) & 0xffff; + + return i; +} + +float +ntohf (uint32_t i) +{ + // integer part = i[14 to 0] + float f = (i >> 16) & 0x7fff; + + // fraction part = i[15 to 0] + f += (i & 0xffff) / 65536.0f; + + // sign = i[31] + if ((i >> 31) & 1) + f = -f; + + return f; +} |