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commit ac64195ccd4f320659fd0058bc7524c6fd0b37b4
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Author: DJ Delorie <dj@redhat.com>
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Date: Wed Mar 20 23:56:59 2019 -0400
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iconv, localedef: avoid floating point rounding differences [BZ #24372]
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Two cases of "int * 1.4" may result in imprecise results, which
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in at least one case resulted in i686 and x86-64 producing
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different locale files. This replaced that floating point multiply
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with integer operations. While the hash table margin is increased
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from 40% to 50%, testing shows only 2% increase in overall size
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of the locale archive.
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https://bugzilla.redhat.com/show_bug.cgi?id=1311954
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Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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diff --git a/iconv/iconvconfig.c b/iconv/iconvconfig.c
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index d5e8e714233f78d8..696fc8d31231ca2d 100644
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--- a/iconv/iconvconfig.c
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+++ b/iconv/iconvconfig.c
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@@ -1079,9 +1079,9 @@ write_output (void)
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/* Create the hashing table. We know how many strings we have.
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Creating a perfect hash table is not reasonable here. Therefore
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- we use open hashing and a table size which is the next prime 40%
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+ we use open hashing and a table size which is the next prime 50%
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larger than the number of strings. */
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- hash_size = next_prime (nnames * 1.4);
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+ hash_size = next_prime (nnames + nnames >> 1);
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hash_table = (struct hash_entry *) xcalloc (hash_size,
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sizeof (struct hash_entry));
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/* Fill the hash table. */
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diff --git a/locale/programs/ld-collate.c b/locale/programs/ld-collate.c
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index d2eebcfdbb0677e5..9a1639b999d0e2aa 100644
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--- a/locale/programs/ld-collate.c
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+++ b/locale/programs/ld-collate.c
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@@ -2401,8 +2401,8 @@ collate_output (struct localedef_t *locale, const struct charmap_t *charmap,
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runp = runp->next;
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}
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- /* Add 40% and find the next prime number. */
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- elem_size = next_prime (elem_size * 1.4);
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+ /* Add 50% and find the next prime number. */
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+ elem_size = next_prime (elem_size + elem_size >> 1);
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/* Allocate the table. Each entry consists of two words: the hash
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value and an index in a secondary table which provides the index
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