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Use accumulating hash, instead of allocating intermediate string

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Change-Id: Ie93ac8df3066159ad11ff7f68c7ba85e7f5aa8bc
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
This commit is contained in:
João Abecasis 2012-03-27 12:59:24 +02:00 committed by Qt by Nokia
parent 2e92714090
commit d5020b8913
1 changed files with 17 additions and 4 deletions
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21
src/corelib/kernel/qtranslator.cpp
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@ -101,10 +101,9 @@ static bool match(const uchar* found, const char* target, uint len)
return (memcmp(found, target, len) == 0 && target[len] == '\0');
}
static uint elfHash(const char *name)
static void elfHash_continue(const char *name, uint &h)
{
const uchar *k;
uint h = 0;
uint g;
if (name) {
@ -116,9 +115,20 @@ static uint elfHash(const char *name)
h &= ~g;
}
}
}
static void elfHash_finish(uint &h)
{
if (!h)
h = 1;
return h;
}
static uint elfHash(const char *name)
{
uint hash = 0;
elfHash_continue(name, hash);
elfHash_finish(hash);
return hash;
}
static int numerusHelper(int n, const uchar *rules, int rulesSize)
@ -830,7 +840,10 @@ QString QTranslatorPrivate::do_translate(const char *context, const char *source
numerus = numerusHelper(n, numerusRulesArray, numerusRulesLength);
for (;;) {
quint32 h = elfHash(QByteArray(QByteArray(sourceText) + comment).constData());
quint32 h = 0;
elfHash_continue(sourceText, h);
elfHash_continue(comment, h);
elfHash_finish(h);
const uchar *start = offsetArray;
const uchar *end = start + ((numItems-1) << 3);