ref: bf7e8777f391caa82705a0b64709a95672d2632c
dir: /sys/src/cmd/tcs/tune.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "hdr.h"
#include "conv.h"
typedef struct Tmap Tmap;
struct Tmap
{
Rune u;
Rune t;
};
static Tmap t1[] =
{
{0x0b85/*அ*/, 0xe201/**/},
{0x0b86/*ஆ*/, 0xe202/**/},
{0x0b87/*இ*/, 0xe203/**/},
{0x0b88/*ஈ*/, 0xe204/**/},
{0x0b89/*உ*/, 0xe205/**/},
{0x0b8a/*ஊ*/, 0xe206/**/},
{0x0b8e/*எ*/, 0xe207/**/},
{0x0b8f/*ஏ*/, 0xe208/**/},
{0x0b90/*ஐ*/, 0xe209/**/},
{0x0b92/*ஒ*/, 0xe20a/**/},
{0x0b93/*ஓ*/, 0xe20b/**/},
{0x0b94/*ஔ*/, 0xe20c/**/},
{0x0b83/*ஃ*/, 0xe20d/**/}
};
static Rune t2[] =
{
0x0bcd/*்*/,
0x0bcd/*்*/, // filler
0x0bbe/*ா*/,
0x0bbf/*ி*/,
0x0bc0/*ீ*/,
0x0bc1/*ு*/,
0x0bc2/*ூ*/,
0x0bc6/*ெ*/,
0x0bc7/*ே*/,
0x0bc8/*ை*/,
0x0bca/*ொ*/,
0x0bcb/*ோ*/,
0x0bcc/*ௌ*/
};
static Tmap t3[] =
{
{0x0b95/*க*/, 0xe211/**/},
{0x0b99/*ங*/, 0xe221/**/},
{0x0b9a/*ச*/, 0xe231/**/},
{0x0b9c/*ஜ*/, 0xe331/**/},
{0x0b9e/*ஞ*/, 0xe241/**/},
{0x0b9f/*ட*/, 0xe251/**/},
{0x0ba3/*ண*/, 0xe261/**/},
{0x0ba4/*த*/, 0xe271/**/},
{0x0ba8/*ந*/, 0xe281/**/},
{0x0ba9/*ன*/, 0xe321/**/},
{0x0baa/*ப*/, 0xe291/**/},
{0x0bae/*ம*/, 0xe2a1/**/},
{0x0baf/*ய*/, 0xe2b1/**/},
{0x0bb0/*ர*/, 0xe2c1/**/},
{0x0bb1/*ற*/, 0xe311/**/},
{0x0bb2/*ல*/, 0xe2d1/**/},
{0x0bb3/*ள*/, 0xe301/**/},
{0x0bb4/*ழ*/, 0xe2f1/**/},
{0x0bb5/*வ*/, 0xe2e1/**/},
{0x0bb6/*ஶ*/, 0xe341/**/},
{0x0bb7/*ஷ*/, 0xe351/**/},
{0x0bb8/*ஸ*/, 0xe361/**/},
{0x0bb9/*ஹ*/, 0xe371/**/}
};
static Rune
findbytune(Tmap *tab, int size, Rune t)
{
int i;
for(i = 0; i < size; i++)
if(tab[i].t == t)
return tab[i].u;
return Runeerror;
}
static Rune
findbyuni(Tmap *tab, int size, Rune u)
{
int i;
for(i = 0; i < size; i++)
if(tab[i].u == u)
return tab[i].t;
return Runeerror;
}
static int
findindex(Rune *rstr, int size, Rune r)
{
int i;
for(i = 0; i < size; i++)
if(rstr[i] == r)
return i;
return -1;
}
void
tune_in(int fd, long *, struct convert *out)
{
Biobuf b;
Rune *r, *er, tr;
int c, i;
r = runes;
er = runes+N-3;
Binit(&b, fd, OREAD);
while((c = Bgetrune(&b)) != Beof){
ninput += b.runesize;
if(r >= er){
OUT(out, runes, r-runes);
r = runes;
}
if(c>=0xe210/**/ && c <= 0xe38c/**/ && (i = c%16) < nelem(t2)){
if(c >= 0xe380/**/){
*r++ = 0x0b95/*க*/;
*r++ = 0x0bcd/*்*/;
*r++ = 0x0bb7/*ஷ*/;
}else
*r++ = findbytune(t3, nelem(t3), c-i+1);
if(i != 1)
*r++ = t2[i];
}else if((tr = findbytune(t1, nelem(t1), c)) != Runeerror)
*r++ = tr;
else switch(c){
case 0xe3d0/**/:
*r++ = 0x0ba3/*ண*/; *r++ = 0x0bbe/*ா*/;
break;
case 0xe3d1/**/:
*r++ = 0x0bb1/*ற*/; *r++ = 0x0bbe/*ா*/;
break;
case 0xe3d2/**/:
*r++ = 0x0ba9/*ன*/; *r++ = 0x0bbe/*ா*/;
break;
case 0xe3d4/**/:
*r++ = 0x0ba3/*ண*/; *r++ = 0x0bc8/*ை*/;
break;
case 0xe3d5/**/:
*r++ = 0x0bb2/*ல*/; *r++ = 0x0bc8/*ை*/;
break;
case 0xe3d6/**/:
*r++ = 0x0bb3/*ள*/; *r++ = 0x0bc8/*ை*/;
break;
case 0xe3d7/**/:
*r++ = 0x0ba9/*ன*/; *r++ = 0x0bc8/*ை*/;
break;
case 0xe38d/**/:
*r++ = 0x0bb6/*ஶ*/; *r++ = 0x0bcd/*்*/; *r++ = 0x0bb0/*ர*/; *r++ = 0x0bc0/*ீ*/;
break;
default:
if(c >= 0xe200 && c <= 0xe3ff){
if(squawk)
warn("rune 0x%x not in output cs", c);
nerrors++;
if(clean)
break;
c = BADMAP;
}
*r++ = c;
break;
}
}
if(r > runes)
OUT(out, runes, r-runes);
OUT(out, runes, 0);
}
void
tune_out(Rune *r, int n, long *)
{
static int state = 0;
static Rune lastr;
Rune *er, tr, rr;
char *p;
int i;
nrunes += n;
er = r+n;
for(p = obuf; r < er; r++){
switch(state){
case 0:
case0:
if((tr = findbyuni(t3, nelem(t3), *r)) != Runeerror){
lastr = tr;
state = 1;
}else if(*r == 0x0b92/*ஒ*/){
lastr = 0xe20a/**/;
state = 3;
}else if((tr = findbyuni(t1, nelem(t1), *r)) != Runeerror)
p += runetochar(p, &tr);
else
p += runetochar(p, r);
break;
case 1:
case1:
if((i = findindex(t2, nelem(t2), *r)) != -1){
if(lastr && lastr != Runeerror)
lastr += i-1;
if(*r ==0x0bc6/*ெ*/)
state = 5;
else if(*r ==0x0bc7/*ே*/)
state = 4;
else if(lastr == 0xe210/**/)
state = 2;
else if(lastr == 0xe340/**/)
state = 6;
else{
if(lastr)
p += runetochar(p, &lastr);
state = 0;
}
}else if(lastr && lastr != Runeerror && (*r == 0x00b2/*²*/ || *r == 0x00b3/*³*/ || *r == 0x2074/*⁴*/)){
if(squawk)
warn("character <U+%.4X, U+%.4X> not in output cs", lastr, *r);
lastr = clean ? 0 : Runeerror;
nerrors++;
}else{
if(lastr)
p += runetochar(p, &lastr);
state = 0;
goto case0;
}
break;
case 2:
if(*r == 0x0bb7/*ஷ*/){
lastr = 0xe381/**/;
state = 1;
break;
}
p += runetochar(p, &lastr);
state = 0;
goto case0;
case 3:
state = 0;
if(*r == 0x0bd7/*ௗ*/){
rr = 0xe20c/**/;
p += runetochar(p, &rr);
break;
}
p += runetochar(p, &lastr);
goto case0;
case 4:
state = 0;
if(*r == 0x0bbe/*ா*/){
if(lastr){
if(lastr != Runeerror)
lastr += 3;
p += runetochar(p, &lastr);
}
break;
}
if(lastr)
p += runetochar(p, &lastr);
goto case0;
case 5:
state = 0;
if(*r == 0x0bbe/*ா*/ || *r == 0x0bd7/*ௗ*/){
if(lastr){
if(lastr != Runeerror)
lastr += *r == 0x0bbe/*ா*/ ? 3 : 5;
p += runetochar(p, &lastr);
}
break;
}
if(lastr)
p += runetochar(p, &lastr);
goto case0;
case 6:
if(*r == 0x0bb0/*ர*/){
state = 7;
break;
}
p += runetochar(p, &lastr);
state = 0;
goto case0;
case 7:
if(*r == 0x0bc0/*ீ*/){
rr = 0xe38d/**/;
p += runetochar(p, &rr);
state = 0;
break;
}
p += runetochar(p, &lastr);
lastr = 0xe2c1/**/;
state = 1;
goto case1;
}
}
if(n == 0 && state != 0){
if(lastr)
p += runetochar(p, &lastr);
state = 0;
}
noutput += p-obuf;
if(p > obuf)
write(1, obuf, p-obuf);
}