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author | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 1999-04-27 02:56:30 +0000 |
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committer | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 1999-04-27 02:56:30 +0000 |
commit | e975828471542a8fa3db08ecb641eca2b92e3771 (patch) | |
tree | edaea1b4c530c0b846e59bdf88d29592b57b70e1 /missing/isinf.c | |
parent | e67e5adf4e33b79c3bc2f2c8a8b4a790a88adcf2 (diff) |
better AIX support
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_3@445 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'missing/isinf.c')
-rw-r--r-- | missing/isinf.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/missing/isinf.c b/missing/isinf.c new file mode 100644 index 0000000000..0297efdfd4 --- /dev/null +++ b/missing/isinf.c @@ -0,0 +1,18 @@ +static double zero() { return 0.0; } +static double one() { return 1.0; } +static double inf() { return one() / zero(); } + +int +isinf(n) + double n; +{ + static double pinf = 0.0; + static double ninf = 0.0; + + if (pinf == 0.0) { + pinf = inf(); + ninf = -pinf; + } + return memcmp(&n, &pinf, sizeof n) == 0 + || memcmp(&n, &ninf, sizeof n) == 0; +} |