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Diffstat (limited to '')
| -rw-r--r-- | timeval-operations.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/timeval-operations.h b/timeval-operations.h new file mode 100644 index 0000000..177027d --- /dev/null +++ b/timeval-operations.h @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2015 The TCPDUMP project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef netdissect_timeval_operations_h +#define netdissect_timeval_operations_h + +/* Operations on timevals. */ + +#define ND_MICRO_PER_SEC 1000000 +#define ND_NANO_PER_SEC 1000000000 + +#define netdissect_timevalclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0) + +#define netdissect_timevalisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) + +#define netdissect_timevalcmp(tvp, uvp, cmp) \ + (((tvp)->tv_sec == (uvp)->tv_sec) ? \ + ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ + ((tvp)->tv_sec cmp (uvp)->tv_sec)) + +#define netdissect_timevaladd(tvp, uvp, vvp, nano_prec) \ + do { \ + (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \ + (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \ + if (nano_prec) { \ + if ((vvp)->tv_usec >= ND_NANO_PER_SEC) { \ + (vvp)->tv_sec++; \ + (vvp)->tv_usec -= ND_NANO_PER_SEC; \ + } \ + } else { \ + if ((vvp)->tv_usec >= ND_MICRO_PER_SEC) { \ + (vvp)->tv_sec++; \ + (vvp)->tv_usec -= ND_MICRO_PER_SEC; \ + } \ + } \ + } while (0) + +#define netdissect_timevalsub(tvp, uvp, vvp, nano_prec) \ + do { \ + (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ + (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ + if ((vvp)->tv_usec < 0) { \ + (vvp)->tv_sec--; \ + (vvp)->tv_usec += (nano_prec ? ND_NANO_PER_SEC : \ + ND_MICRO_PER_SEC); \ + } \ + } while (0) + +#endif /* netdissect_timeval_operations_h */ |