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