luc14n0/glib
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/glib.git synced 2025-03-27 18:10:03 +01:00
Code Issues Packages Projects Releases Wiki Activity

Made g_utf8_to_ucs4_fast() even faster

Browse Source 
https://bugzilla.gnome.org/show_bug.cgi?id=619435
This commit is contained in:
Mikhail Zabaluev 2010-03-17 02:34:51 +02:00 committed by Matthias Clasen
parent 1b101a3873
commit 69efeee287
1 changed files with 16 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
glib/gutf8.c
View File

@ -851,7 +851,6 @@ g_utf8_to_ucs4_fast (const gchar *str,
glong len,
glong *items_written)
{
gint j, charlen;
gunichar *result;
gint n_chars, i;
const gchar *p;
@ -882,49 +881,37 @@ g_utf8_to_ucs4_fast (const gchar *str,
p = str;
for (i=0; i < n_chars; i++)
{
gunichar wc = ((unsigned char *)p)[0];
gunichar wc = (guchar)*p++;
if (wc < 0x80)
{
result[i] = wc;
p++;
}
else
{
if (wc < 0xe0)
gunichar mask = 0x40;
if (G_UNLIKELY ((wc & mask) == 0))
{
charlen = 2;
wc &= 0x1f;
}
else if (wc < 0xf0)
{
charlen = 3;
wc &= 0x0f;
}
else if (wc < 0xf8)
{
charlen = 4;
wc &= 0x07;
}
else if (wc < 0xfc)
{
charlen = 5;
wc &= 0x03;
}
else
{
charlen = 6;
wc &= 0x01;
/* It's an out-of-sequence 10xxxxxxx byte.
* Rather than making an ugly hash of this and the next byte
* and overrunning the buffer, it's more useful to treat it
* with a replacement character */
result[i] = 0xfffd;
continue;
}
for (j = 1; j < charlen; j++)
do
{
wc <<= 6;
wc |= ((unsigned char *)p)[j] & 0x3f;
wc |= (guchar)(*p++) & 0x3f;
mask <<= 5;
}
while((wc & mask) != 0);
wc &= mask - 1;
result[i] = wc;
p += charlen;
}
}
result[i] = 0;