forked from bartvdbraak/blender
233 lines
5.3 KiB
C
233 lines
5.3 KiB
C
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/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2009 Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Alexandr Kuznetsov, Andrea Weikert
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#include "utfconv.h"
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size_t count_utf_8_from_16(wchar_t * string16)
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{
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int i;
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size_t count = 0;
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wchar_t u = 0;
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if(!string16) return 0;
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for(i=0;u = string16[i];i++)
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{
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if(u < 0x0080) count+=1; else
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if(u < 0x0800) count+=2; else
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if(u < 0xD800) count+=3; else
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if(u < 0xDC00) {
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i++;
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if((u = string16[i])==0) break;
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if(u >= 0xDC00 && u < 0xE000)count+=4;
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} else
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if(u < 0xE000) /*illigal*/; else
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count+=3;
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}
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return ++count;
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}
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size_t count_utf_16_from_8(char * string8)
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{
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size_t count = 0;
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char u;
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char type = 0;
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unsigned int u32 = 0;
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if(!string8) return 0;
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for(;(u = *string8);string8++)
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{
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if(type==0)
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{
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if((u&0x01<<7) == 0) {count++; u32 = 0; continue;} //1 utf-8 char
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if((u&0x07<<5) == 0xC0) {type=1; u32 = u & 0x1F; continue;} //2 utf-8 char
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if((u&0x0F<<4) == 0xE0) {type=2; u32 = u & 0x0F; continue;} //3 utf-8 char
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if((u&0x1F<<3) == 0xF0) {type=3; u32 = u & 0x07; continue;} //4 utf-8 char
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continue;
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} else
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{
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if((u & 0xC0) == 0x80) {u32=(u32<<6) | (u&0x3F); type--;} else
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{u32 = 0; type = 0;};
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}
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if(type==0)
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{
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if((0 < u32 && u32 < 0xD800) || (0xE000 <= u32 && u32 < 0x10000)) count++; else
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if(0x10000 <= u32 && u32 < 0x110000) count+=2;
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u32 = 0;
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}
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}
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return ++count;
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}
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int conv_utf_16_to_8(wchar_t * in16, char * out8, size_t size8)
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{
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char * out8end = out8+size8;
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wchar_t u = 0;
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int err = 0;
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if(!size8 || !in16 || !out8) return UTF_ERROR_NULL_IN;
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out8end--;
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for(; out8 < out8end && (u=*in16); in16++, out8++)
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{
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if(u < 0x0080) *out8 = u; else
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if(u < 0x0800) {
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if(out8 + 1 >= out8end) break;
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*out8++=(0x3<<6) | (0x1F & (u>>6));
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*out8 =(0x1<<7) | (0x3F & (u));
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}else
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if(u < 0xD800 || u >= 0xE000) {
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if(out8 + 2 >= out8end) break;
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*out8++=(0x7<<5) | (0xF & (u>>12));
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*out8++=(0x1<<7) | (0x3F & (u>>6));;
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*out8 =(0x1<<7) | (0x3F & (u));
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}else
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if(u < 0xDC00) {
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wchar_t u2 = *++in16;
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if(!u2) break;
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if(u2 >= 0xDC00 && u2 < 0xE000)
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{
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if(out8 + 3 >= out8end) break; else {
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unsigned int uc = 0x10000 + (u2 - 0xDC00) + ((u - 0xD800)<<10);
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*out8++=(0xF<<4) | (0x7 & (uc>>18));
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*out8++=(0x1<<7) | (0x3F & (uc>>12));
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*out8++=(0x1<<7) | (0x3F & (uc>>6));
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*out8 =(0x1<<7) | (0x3F & (uc));
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}
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} else {out8--; err|=UTF_ERROR_ILLCHAR;};
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} else
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if(u < 0xE000) {out8--; err|=UTF_ERROR_ILLCHAR;}
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}
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*out8=*out8end=0;
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if(*in16) err|=UTF_ERROR_SMALL;
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return err;
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}
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int conv_utf_8_to_16(char * in8, wchar_t * out16, size_t size16)
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{
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char u;
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char type = 0;
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wchar_t u32 = 0;
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wchar_t * out16end = out16+size16;
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int err = 0;
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if(!size16 || !in8 || !out16) return UTF_ERROR_NULL_IN;
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out16end--;
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for(;out16<out16end && (u = *in8);in8++)
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{
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if(type==0)
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{
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if((u&0x01<<7) == 0) {*out16=u; out16++; u32 = 0; continue;} //1 utf-8 char
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if((u&0x07<<5) == 0xC0) {type=1; u32 = u & 0x1F; continue;} //2 utf-8 char
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if((u&0x0F<<4) == 0xE0) {type=2; u32 = u & 0x0F; continue;} //3 utf-8 char
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if((u&0x1F<<3) == 0xF0) {type=3; u32 = u & 0x07; continue;} //4 utf-8 char
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err|=UTF_ERROR_ILLCHAR; continue;
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} else
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{
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if((u & 0xC0) == 0x80) {u32=(u32<<6) | (u&0x3F); type--;} else
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{u32 = 0; type = 0; err|=UTF_ERROR_ILLSEQ;};
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}
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if(type==0)
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{
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if((0 < u32 && u32 < 0xD800) || (0xE000 <= u32 && u32 < 0x10000)) {*out16=u32; out16++;}else
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if(0x10000 <= u32 && u32 < 0x110000) {
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if(out16 + 1 >= out16end) break;
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u32-=0x10000;
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*out16 = 0xD800 + (u32 >> 10);
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out16++;
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*out16 = 0xDC00 + (u32 & 0x3FF);
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out16++;
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};
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u32 = 0;
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}
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}
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*out16=*out16end=0;
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if(*in8) err|=UTF_ERROR_SMALL;
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return err;
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}
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int is_ascii(char * in8)
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{
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for(in8; *in8; in8++)
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if(0x80 & *in8) return 0;
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return 1;
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}
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void utf_8_cut_end(char * inout8, size_t maxcutpoint)
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{
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const char * start = inout8;
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char * cur = inout8 + maxcutpoint;
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char cc;
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if(!inout8) return;
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cc = *cur;
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}
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char * alloc_utf_8_from_16(wchar_t * in16, size_t add)
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{
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size_t bsize = count_utf_8_from_16(in16);
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char * out8 = NULL;
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if(!bsize) return NULL;
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out8 = (char*)malloc(sizeof(char) * (bsize + add));
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conv_utf_16_to_8(in16,out8, bsize);
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return out8;
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}
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wchar_t * alloc_utf16_from_8(char * in8, size_t add)
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{
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size_t bsize = count_utf_16_from_8(in8);
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wchar_t * out16 = NULL;
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if(!bsize) return NULL;
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out16 =(wchar_t*) malloc(sizeof(wchar_t) * (bsize + add));
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conv_utf_8_to_16(in8,out16, bsize);
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return out16;
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}
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