/*
* LIBOIL - Library of Optimized Inner Loops
* Copyright (c) 2004 David A. Schleef <ds@schleef.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
//Portions Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <liboil/liboil.h>
#include "liboil/utf8/utf8.h"
#ifdef HAVE_UNALIGNED_ACCESS
static void
utf8_validate_fast (int32_t *d_1, uint8_t *s, int n)
{
int i;
int extra_bytes;
int mask;
i=0;
while (i<n) {
if (i < n-3 && (*(uint32_t *)(s+i) & 0x80808080) == 0) {
i+=4;
continue;
}
if (s[i] < 128) {
i++;
continue;
}
if ((s[i] & 0xe0) == 0xc0) {
extra_bytes = 1;
mask = 0x7f;
} else if ((s[i] & 0xf0) == 0xe0) {
extra_bytes = 2;
mask = 0x1f;
} else if ((s[i] & 0xf8) == 0xf0) {
extra_bytes = 3;
mask = 0x0f;
} else {
goto error;
}
if (i + extra_bytes >= n) goto error;
while(extra_bytes--) {
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
}
i++;
}
error:
d_1[0] = i;
}
OIL_DEFINE_IMPL (utf8_validate_fast, utf8_validate);
#endif
static void
utf8_validate_fast2 (int32_t *d_1, uint8_t *s, int n)
{
int i;
uint8_t x;
i=0;
while (i<n) {
x = s[i];
if (!(x & 0x80)) {
i++;
continue;
}
x <<= 1;
if (!(x & 0x80)) {
goto error;
}
x <<= 1;
if (!(x & 0x80)) {
if (i + 1 >= n) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
continue;
}
x <<= 1;
if (!(x & 0x80)) {
if (i + 2 >= n) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
continue;
}
x <<= 1;
if (!(x & 0x80)) {
if (i + 3 >= n) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
continue;
}
goto error;
}
error:
d_1[0] = i;
}
OIL_DEFINE_IMPL (utf8_validate_fast2, utf8_validate);
#ifdef HAVE_UNALIGNED_ACCESS
static void
utf8_validate_fast3 (int32_t *d_1, uint8_t *s, int n)
{
int i;
uint8_t x;
i=0;
while (i<n) {
if (i < n-3 && (*(uint32_t *)(s+i) & 0x80808080) == 0) {
i+=4;
continue;
}
x = s[i];
if (!(x & 0x80)) {
i++;
continue;
}
if (!(x & 0x40)) {
goto error;
}
if (!(x & 0x20)) {
if (i + 1 >= n) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
continue;
}
if (!(x & 0x10)) {
if (i + 2 >= n) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
continue;
}
if (!(x & 0x08)) {
if (i + 3 >= n) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
i++;
continue;
}
goto error;
}
error:
d_1[0] = i;
}
OIL_DEFINE_IMPL (utf8_validate_fast3, utf8_validate);
#endif
static uint8_t utf8_table[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 8, 8, 8, 8, 8, 8, 8, 8
};
static void
utf8_validate_lookup (int32_t *d_1, uint8_t *s, int n)
{
int i;
uint8_t x;
i=0;
while (i<n) {
x = utf8_table[s[i]];
if (x > 0) {
if (x == 8 || i + x >= n) goto error;
while (x>0) {
i++;
if ((s[i] & 0xc0) != 0x80) goto error;
x--;
}
}
i++;
}
error:
d_1[0] = i;
}
OIL_DEFINE_IMPL (utf8_validate_lookup, utf8_validate);
#if 0
static void
utf8_validate_asm1 (int32_t *d_1, uint8_t *s, int n)
{
uint8_t *tmp = s;
asm (
"1:\n"
" movb (%%eax), %%bl\n"
" testb %%bl, %%bl\n"
//" jns 3f\n"
" js 2f\n"
"3:\n"
" addl $1, %%eax\n"
" subl $1, %%ecx\n"
" jne 1b\n"
"2:\n"
: "+a" (tmp), "+c" (n)
:
: "ebx" );
d_1[0] = tmp - s;
}
OIL_DEFINE_IMPL (utf8_validate_asm1, utf8_validate);
static void
utf8_validate_asm2 (int32_t *d_1, uint8_t *s, int n)
{
uint8_t *tmp = s;
asm (
"1:\n"
" testl $0x80808080, (%%eax)\n"
" jne 2f\n"
" testl $0x80808080, 4(%%eax)\n"
" jne 2f\n"
" testl $0x80808080, 8(%%eax)\n"
" jne 2f\n"
" testl $0x80808080, 12(%%eax)\n"
" jne 2f\n"
" addl $16, %%eax\n"
" subl $16, %%ecx\n"
" jge 1b\n"
" jl 4f\n"
"2:\n"
" movb (%%eax), %%bl\n"
" testb %%bl, %%bl\n"
" js 4f\n"
"3:\n"
" addl $1, %%eax\n"
" subl $1, %%ecx\n"
" jne 1b\n"
"4:\n"
: "+a" (tmp), "+c" (n)
:
: "ebx" );
d_1[0] = tmp - s;
}
OIL_DEFINE_IMPL (utf8_validate_asm2, utf8_validate);
#endif
#ifdef HAVE_UNALIGNED_ACCESS
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_utf8_validate_fast() {
return &_oil_function_impl_utf8_validate_fast;
}
#endif
#endif
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_utf8_validate_fast2() {
return &_oil_function_impl_utf8_validate_fast2;
}
#endif
#ifdef HAVE_UNALIGNED_ACCESS
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_utf8_validate_fast3() {
return &_oil_function_impl_utf8_validate_fast3;
}
#endif
#endif
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_utf8_validate_lookup() {
return &_oil_function_impl_utf8_validate_lookup;
}
#endif
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_utf8_validate_asm1() {
return &_oil_function_impl_utf8_validate_asm1;
}
#endif
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_utf8_validate_asm2() {
return &_oil_function_impl_utf8_validate_asm2;
}
#endif