blender/intern/utfconv/utfconv.c

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2012 Blender Foundation.
* All rights reserved.
*
* Contributor(s): Alexandr Kuznetsov, Andrea Weikert
*
* ***** END GPL LICENSE BLOCK *****
*/
#include "utfconv.h"
size_t count_utf_8_from_16(const wchar_t *string16)
{
int i;
size_t count = 0;
wchar_t u = 0;
if (!string16) {
return 0;
}
for (i = 0; (u = string16[i]); i++) {
if (u < 0x0080) {
count += 1;
}
else {
if (u < 0x0800) {
count += 2;
}
else {
if (u < 0xD800) {
count += 3;
}
else {
if (u < 0xDC00) {
i++;
if ((u = string16[i]) == 0) {
break;
}
if (u >= 0xDC00 && u < 0xE000) {
count += 4;
}
}
else {
if (u < 0xE000) {
/*illigal*/;
}
else {
count += 3;
}
}
}
}
}
}
return ++count;
}
size_t count_utf_16_from_8(const char *string8)
{
size_t count = 0;
char u;
char type = 0;
unsigned int u32 = 0;
if (!string8) return 0;
for (; (u = *string8); string8++) {
if (type == 0) {
if ((u & 0x01 << 7) == 0) { count++; u32 = 0; continue; } //1 utf-8 char
if ((u & 0x07 << 5) == 0xC0) { type = 1; u32 = u & 0x1F; continue; } //2 utf-8 char
if ((u & 0x0F << 4) == 0xE0) { type = 2; u32 = u & 0x0F; continue; } //3 utf-8 char
if ((u & 0x1F << 3) == 0xF0) { type = 3; u32 = u & 0x07; continue; } //4 utf-8 char
continue;
}
else {
if ((u & 0xC0) == 0x80) {
u32 = (u32 << 6) | (u & 0x3F);
type--;
}
else {
u32 = 0;
type = 0;
}
}
if (type == 0) {
if ((0 < u32 && u32 < 0xD800) || (0xE000 <= u32 && u32 < 0x10000)) count++;
else if (0x10000 <= u32 && u32 < 0x110000) count += 2;
u32 = 0;
}
}
return ++count;
}
int conv_utf_16_to_8(const wchar_t *in16, char *out8, size_t size8)
{
char *out8end = out8 + size8;
wchar_t u = 0;
int err = 0;
if (!size8 || !in16 || !out8) return UTF_ERROR_NULL_IN;
out8end--;
for (; out8 < out8end && (u = *in16); in16++, out8++) {
if (u < 0x0080) {
*out8 = u;
}
else if (u < 0x0800) {
if (out8 + 1 >= out8end) break;
*out8++ = (0x3 << 6) | (0x1F & (u >> 6));
*out8 = (0x1 << 7) | (0x3F & (u));
}
else if (u < 0xD800 || u >= 0xE000) {
if (out8 + 2 >= out8end) break;
*out8++ = (0x7 << 5) | (0xF & (u >> 12));
*out8++ = (0x1 << 7) | (0x3F & (u >> 6));;
*out8 = (0x1 << 7) | (0x3F & (u));
}
else if (u < 0xDC00) {
wchar_t u2 = *++in16;
if (!u2) break;
if (u2 >= 0xDC00 && u2 < 0xE000) {
if (out8 + 3 >= out8end) break; else {
unsigned int uc = 0x10000 + (u2 - 0xDC00) + ((u - 0xD800) << 10);
*out8++ = (0xF << 4) | (0x7 & (uc >> 18));
*out8++ = (0x1 << 7) | (0x3F & (uc >> 12));
*out8++ = (0x1 << 7) | (0x3F & (uc >> 6));
*out8 = (0x1 << 7) | (0x3F & (uc));
}
}
else {
out8--; err |= UTF_ERROR_ILLCHAR;
}
}
else if (u < 0xE000) {
out8--; err |= UTF_ERROR_ILLCHAR;
}
}
*out8 = *out8end = 0;
if (*in16) err |= UTF_ERROR_SMALL;
return err;
}
int conv_utf_8_to_16(const char *in8, wchar_t *out16, size_t size16)
{
char u;
char type = 0;
wchar_t u32 = 0;
wchar_t *out16end = out16 + size16;
int err = 0;
if (!size16 || !in8 || !out16) return UTF_ERROR_NULL_IN;
out16end--;
for (; out16 < out16end && (u = *in8); in8++) {
if (type == 0) {
if ((u & 0x01 << 7) == 0) { *out16 = u; out16++; u32 = 0; continue; } //1 utf-8 char
if ((u & 0x07 << 5) == 0xC0) { type = 1; u32 = u & 0x1F; continue; } //2 utf-8 char
if ((u & 0x0F << 4) == 0xE0) { type = 2; u32 = u & 0x0F; continue; } //3 utf-8 char
if ((u & 0x1F << 3) == 0xF0) { type = 3; u32 = u & 0x07; continue; } //4 utf-8 char
err |= UTF_ERROR_ILLCHAR;
continue;
}
else {
if ((u & 0xC0) == 0x80) {
u32 = (u32 << 6) | (u & 0x3F);
type--;
}
else {
u32 = 0; type = 0; err |= UTF_ERROR_ILLSEQ;
}
}
if (type == 0) {
if ((0 < u32 && u32 < 0xD800) || (0xE000 <= u32 && u32 < 0x10000)) {
*out16 = u32;
out16++;
}
else if (0x10000 <= u32 && u32 < 0x110000) {
if (out16 + 1 >= out16end) break;
u32 -= 0x10000;
*out16 = 0xD800 + (u32 >> 10);
out16++;
*out16 = 0xDC00 + (u32 & 0x3FF);
out16++;
}
u32 = 0;
}
}
*out16 = *out16end = 0;
if (*in8) err |= UTF_ERROR_SMALL;
return err;
}
int is_ascii(const char *in8)
{
for (; *in8; in8++)
if (0x80 & *in8) return 0;
return 1;
}
void utf_8_cut_end(char *inout8, size_t maxcutpoint)
{
char *cur = inout8 + maxcutpoint;
char cc;
if (!inout8) return;
cc = *cur;
}
char *alloc_utf_8_from_16(const wchar_t *in16, size_t add)
{
size_t bsize = count_utf_8_from_16(in16);
char *out8 = NULL;
if (!bsize) return NULL;
out8 = (char *)malloc(sizeof(char) * (bsize + add));
conv_utf_16_to_8(in16, out8, bsize);
return out8;
}
wchar_t *alloc_utf16_from_8(const char *in8, size_t add)
{
size_t bsize = count_utf_16_from_8(in8);
wchar_t *out16 = NULL;
if (!bsize) return NULL;
out16 = (wchar_t *) malloc(sizeof(wchar_t) * (bsize + add));
conv_utf_8_to_16(in8, out16, bsize);
return out16;
}