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author | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
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committer | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
commit | 2de9abc5c9d40b3c716307d67d16146f823fd554 (patch) | |
tree | 6979db67934ddc8b564150b465846a383b428ff8 /gnulib/lib/timespec-add.c | |
parent | 33cc1c6fda6e72a7bae1401e9b2cec495a4d3ff1 (diff) | |
download | patch-baserock/bootstrap.tar.gz |
add the output of bootstrapbaserock/bootstrap-pass2baserock/bootstrap
Diffstat (limited to 'gnulib/lib/timespec-add.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/timespec-add.c | 71 |
2 files changed, 71 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/timespec-add.c b/gnulib/lib/timespec-add.c new file mode 100644 index 0000000..813dadb --- /dev/null +++ b/gnulib/lib/timespec-add.c @@ -0,0 +1,71 @@ +/* Add two struct timespec values. + + Copyright (C) 2011 Free Software Foundation, Inc. + + 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/>. */ + +/* Written by Paul Eggert. */ + +/* Return the sum of two timespec values A and B. On overflow, return + an extremal value. This assumes 0 <= tv_nsec <= 999999999. */ + +#include <config.h> +#include "timespec.h" + +#include "intprops.h" + +struct timespec +timespec_add (struct timespec a, struct timespec b) +{ + struct timespec r; + time_t rs = a.tv_sec; + time_t bs = b.tv_sec; + int ns = a.tv_nsec + b.tv_nsec; + int nsd = ns - 1000000000; + int rns = ns; + + if (0 <= nsd) + { + rns = nsd; + if (rs == TYPE_MAXIMUM (time_t)) + { + if (0 <= bs) + goto high_overflow; + bs++; + } + else + rs++; + } + + if (INT_ADD_OVERFLOW (rs, bs)) + { + if (rs < 0) + { + rs = TYPE_MINIMUM (time_t); + rns = 0; + } + else + { + high_overflow: + rs = TYPE_MAXIMUM (time_t); + rns = 999999999; + } + } + else + rs += bs; + + r.tv_sec = rs; + r.tv_nsec = rns; + return r; +} |