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don't downcase characters before hashing them

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* libguile/hash.c (hasher, scm_ihashv): Don't downcase characters before
  hashing them.  That is silly.
This commit is contained in:
Andy Wingo 2011-10-26 00:42:17 +02:00
parent d1d1c5dea5
commit 92e35e8daa
1 changed files with 1 additions and 7 deletions
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8
libguile/hash.c
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@ -252,9 +252,6 @@ scm_raw_ihashq (scm_t_bits key)
}
/* Dirk:FIXME:: why downcase for characters? (2x: scm_hasher, scm_ihashv) */
static unsigned long
hasher (SCM obj, unsigned long n, size_t d)
{
@ -264,7 +261,7 @@ hasher (SCM obj, unsigned long n, size_t d)
return SCM_I_INUM(obj) % n; /* SCM_INUMP(obj) */
case scm_tc3_imm24:
if (SCM_CHARP(obj))
return (unsigned)(scm_c_downcase(SCM_CHAR(obj))) % n;
return ((unsigned)SCM_CHAR(obj)) % n;
switch (SCM_UNPACK (obj)) {
case SCM_EOL_BITS:
d = 256;
@ -405,9 +402,6 @@ SCM_DEFINE (scm_hashq, "hashq", 2, 0, 0,
unsigned long
scm_ihashv (SCM obj, unsigned long n)
{
if (SCM_CHARP(obj))
return ((unsigned long) (scm_c_downcase (SCM_CHAR (obj)))) % n; /* downcase!?!! */
if (SCM_NUMP(obj))
return (unsigned long) hasher(obj, n, 10);
else