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#include <stdio.h>
#define _LIBRCD_C
#include "librcd.h"
#define NF_VALUE -2
#define max(a,b) ((a>b)?a:b)
#define min(a,b) ((a<b)?a:b)
#define bit(i) (1<<i)
#define STRNLEN(str,n) (n?strnlen(str,n):strlen(str))
typedef struct lng_stat2 {
unsigned char a;
unsigned char b;
double rate;
double srate;
double erate;
} lng_stat2;
#include "russian_table.h"
static int end_symbol(char ch) {
if (ch=='\r'||ch=='\n'||ch==0||ch==' '||ch=='\t'||ch==','||ch=='.'||ch=='!'||ch=='?'||ch==';'||ch=='-'||ch==':'||ch=='"'||ch=='\''||ch==')') return 1;
return 0;
}
static int start_symbol(char ch) {
if ((ch=='\t')||ch=='\r'||ch=='\n'||(ch==' ')||(ch=='(')||(ch=='"')||(ch=='\'')) return 1;
return 0;
}
typedef const struct lng_stat2 *lng_stat2_ptr;
static void bfind(const unsigned char *a, lng_stat2_ptr *w, lng_stat2_ptr *k, lng_stat2_ptr *al) {
const struct lng_stat2 *winptr, *koiptr,*altptr;
int ki,wi,ai,d,ws=0,ks=0,as=0;
d=npow2>>1;
wi=d;
ki=d;
ai=d;
winptr=0;
koiptr=0;
altptr=0;
do{
d>>=1;
if(!ws){
if (wi>indexes2) wi-=d;
else {
winptr=enc_win+wi-1;
if(a[0]==winptr->a){
if(a[1]==winptr->b){
ws=1;
}else if(a[1]<winptr->b){
wi-=d;
}else{ //b>win[wi].b
wi+=d;
}
}else if(a[0]<winptr->a){
wi-=d;
}else{ //a>win[wi].a
wi+=d;
}
}
}
if(!ks){
if (ki>indexes2) ki-=d;
else {
koiptr=enc_koi+ki-1;
if(a[0]==koiptr->a){
if(a[1]==koiptr->b){
ks=1;
}else if(a[1]<koiptr->b){
ki-=d;
}else{ //b>win[wi].b
ki+=d;
}
}else if(a[0]<koiptr->a){
ki-=d;
}else{ //a>win[wi].a
ki+=d;
}
}
}
if(!as){
if (ai>indexes2) ai-=d;
else {
altptr=enc_alt+ai-1;
if(a[0]==altptr->a){
if(a[1]==altptr->b){
as=1;
}else if(a[1]<altptr->b){
ai-=d;
}else{ //b>win[wi].b
ai+=d;
}
}else if(a[0]<altptr->a){
ai-=d;
}else{ //a>win[wi].a
ai+=d;
}
}
}
}while(d);
if (ws) *w=winptr;
else *w=NULL;
if (ks) *k=koiptr;
else *k=NULL;
if (as) *al=altptr;
else *al=NULL;
}
static double calculate(double s, double m, double e) {
return s+m+e;
}
static int is_win_charset2(const unsigned char *txt, int len){
const struct lng_stat2 *winptr, *koiptr,*altptr;
double winstep,koistep,altstep,winestep,koiestep,altestep,winsstep,koisstep,altsstep;
double winstat=0,koistat=0,altstat=0,winestat=0,koiestat=0,altestat=0,winsstat=0,koisstat=0,altsstat=0;
long j;
#ifdef _AUTO_DEBUG
fprintf(stderr,"Word: %s\n",txt);
#endif
for(j=0;j<len-1;j++){
//skip bottom half of table
if(txt[j]<128 || txt[j+1]<128) continue;
#ifdef _AUTO_DEBUG
fprintf(stderr,"Pair: %c%c",txt[j],txt[j+1]);
#endif
bfind(txt+j,&winptr,&koiptr,&altptr);
if ((j==0)||(start_symbol(txt[j-1]))) {
if (winptr) winsstep=winptr->srate;
else winsstep=NF_VALUE;
if (koiptr) koisstep=koiptr->srate;
else koisstep=NF_VALUE;
if (altptr) altsstep=altptr->srate;
else altsstep=NF_VALUE;
winestep=0;
koiestep=0;
altestep=0;
winstep=0;
koistep=0;
altstep=0;
#ifdef _AUTO_DEBUG
fprintf(stderr,", Win %lf, Koi %lf, Alt: %lf\n",winsstep,koisstep,altsstep);
#endif
} else if ((j==len-2)||(end_symbol(txt[j+2]))) {
if (winptr) winestep=winptr->erate;
else winestep=NF_VALUE;
if (koiptr) koiestep=koiptr->erate;
else koiestep=NF_VALUE;
if (altptr) altestep=altptr->erate;
else altestep=NF_VALUE;
winsstep=0;
koisstep=0;
altsstep=0;
winstep=0;
koistep=0;
altstep=0;
#ifdef _AUTO_DEBUG
fprintf(stderr,", Win %lf, Koi %lf, Alt %lf\n",winestep,koiestep,altestep);
#endif
} else {
if (winptr) winstep=winptr->rate;
else winstep=NF_VALUE;
if (koiptr) koistep=koiptr->rate;
else koistep=NF_VALUE;
if (altptr) altstep=altptr->rate;
else altstep=NF_VALUE;
winsstep=0;
winestep=0;
koisstep=0;
koiestep=0;
altsstep=0;
altestep=0;
#ifdef _AUTO_DEBUG
fprintf(stderr,", Win %lf, Koi %lf, Alt %lf\n",winstep,koistep,altstep);
#endif
}
winstat+=winstep;
koistat+=koistep;
altstat+=altstep;
winsstat+=winsstep;
koisstat+=koisstep;
altsstat+=altsstep;
winestat+=winestep;
koiestat+=koiestep;
altestat+=altestep;
}
#ifdef _AUTO_DEBUG
fprintf(stderr,"Start. Win: %lf, Koi: %lf, Alt: %lf\n",winsstat,koisstat,altsstat);
fprintf(stderr,"Middle. Win: %lf, Koi: %lf, Alt: %lf\n",winstat,koistat,altstat);
fprintf(stderr,"End. Win: %lf, Koi: %lf, Alt: %lf\n",winestat,koiestat,altestat);
fprintf(stderr,"Final. Win: %lf, Koi: %lf, Alt: %lf\n",calculate(winsstat,winstat,winestat),calculate(koisstat,koistat,koiestat),calculate(altsstat,altstat,altestat));
#endif
if ((calculate(altsstat,altstat,altestat)>calculate(koisstat,koistat,koiestat))&&(calculate(altsstat,altstat,altestat)>calculate(winsstat,winstat,winestat))) return 3;
if (calculate(koisstat,koistat,koiestat)>calculate(winsstat,winstat,winestat)) return 1;
return 0;
}
static int check_utf8(const unsigned char *buf, int len) {
long i,j;
int bytes=0,rflag=0;
unsigned char tmp;
int res=0;
for (i=0;i<len;i++) {
if (buf[i]<128) continue;
if (bytes>0) {
if ((buf[i]&0xC0)==0x80) {
if (rflag) {
tmp=buf[i]&0x3F;
// Russian is 0x410-0x44F
if ((rflag==1)&&(tmp>=0x10)) res++;
else if ((rflag==2)&&(tmp<=0x0F)) res++;
}
bytes--;
} else {
res--;
bytes=1-bytes;
rflag=0;
}
} else {
for (j=6;j>=0;j--)
if ((buf[i]&bit(j))==0) break;
if ((j==0)||(j==6)) {
if ((j==6)&&(bytes<0)) bytes++;
else res--;
continue;
}
bytes=6-j;
if (bytes==1) {
// Cyrrilic D0-D3, Russian - D0-D1
if (buf[i]==0xD0) rflag=1;
else if (buf[i]==0xD1) rflag=2;
}
}
if ((buf[i]==0xD0)||(buf[i]==0xD1)) {
if (i+1==len) break;
}
}
return res;
}
rcd_russian_charset rcdGetRussianCharset(const char *buf,int len) {
long l;
l = STRNLEN(buf,len);
if (check_utf8(buf,l)>1) return RUSSIAN_CHARSET_UTF8;
return is_win_charset2(buf,l);
}
/* Compatibility */
rcd_russian_charset get_russian_charset(const char *buf,int len) {
return rcdGetRussianCharset(buf, len);
}
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