sys/src/cmd/tcs/tune.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <bio.h>
   4 #include "hdr.h"
   5 #include "conv.h"
   6
   7 typedef struct Tmap Tmap;
   8 struct Tmap
   9 {
  10         Rune u;
  11         Rune t;
  12 };
  13
  14 static Tmap t1[] =
  15 {
  16         {0x0b85/*அ*/, 0xe201/**/},
  17         {0x0b86/*ஆ*/, 0xe202/**/},
  18         {0x0b87/*இ*/, 0xe203/**/},
  19         {0x0b88/*ஈ*/, 0xe204/**/},
  20         {0x0b89/*உ*/, 0xe205/**/},
  21         {0x0b8a/*ஊ*/, 0xe206/**/},
  22         {0x0b8e/*எ*/, 0xe207/**/},
  23         {0x0b8f/*ஏ*/, 0xe208/**/},
  24         {0x0b90/*ஐ*/, 0xe209/**/},
  25         {0x0b92/*ஒ*/, 0xe20a/**/},
  26         {0x0b93/*ஓ*/, 0xe20b/**/},
  27         {0x0b94/*ஔ*/, 0xe20c/**/},
  28         {0x0b83/*ஃ*/, 0xe20d/**/}
  29 };
  30
  31 static Rune t2[] =
  32 {
  33         0x0bcd/*்*/,
  34         0x0bcd/*்*/,  // filler
  35         0x0bbe/*ா*/,
  36         0x0bbf/*ி*/,
  37         0x0bc0/*ீ*/,
  38         0x0bc1/*ு*/,
  39         0x0bc2/*ூ*/,
  40         0x0bc6/*ெ*/,
  41         0x0bc7/*ே*/,
  42         0x0bc8/*ை*/,
  43         0x0bca/*ொ*/,
  44         0x0bcb/*ோ*/,
  45         0x0bcc/*ௌ*/
  46 };
  47
  48 static Tmap t3[] =
  49 {
  50         {0x0b95/*க*/, 0xe211/**/},
  51         {0x0b99/*ங*/, 0xe221/**/},
  52         {0x0b9a/*ச*/, 0xe231/**/},
  53         {0x0b9c/*ஜ*/, 0xe331/**/},
  54         {0x0b9e/*ஞ*/, 0xe241/**/},
  55         {0x0b9f/*ட*/, 0xe251/**/},
  56         {0x0ba3/*ண*/, 0xe261/**/},
  57         {0x0ba4/*த*/, 0xe271/**/},
  58         {0x0ba8/*ந*/, 0xe281/**/},
  59         {0x0ba9/*ன*/, 0xe321/**/},
  60         {0x0baa/*ப*/, 0xe291/**/},
  61         {0x0bae/*ம*/, 0xe2a1/**/},
  62         {0x0baf/*ய*/, 0xe2b1/**/},
  63         {0x0bb0/*ர*/, 0xe2c1/**/},
  64         {0x0bb1/*ற*/, 0xe311/**/},
  65         {0x0bb2/*ல*/, 0xe2d1/**/},
  66         {0x0bb3/*ள*/, 0xe301/**/},
  67         {0x0bb4/*ழ*/, 0xe2f1/**/},
  68         {0x0bb5/*வ*/, 0xe2e1/**/},
  69         {0x0bb6/*ஶ*/, 0xe341/**/},
  70         {0x0bb7/*ஷ*/, 0xe351/**/},
  71         {0x0bb8/*ஸ*/, 0xe361/**/},
  72         {0x0bb9/*ஹ*/, 0xe371/**/}
  73 };
  74
  75 static Rune
  76 findbytune(Tmap *tab, int size, Rune t)
  77 {
  78         int i;
  79
  80         for(i = 0; i < size; i++)
  81                 if(tab[i].t == t)
  82                         return tab[i].u;
  83         return Runeerror;
  84 }
  85
  86 static Rune
  87 findbyuni(Tmap *tab, int size, Rune u)
  88 {
  89         int i;
  90
  91         for(i = 0; i < size; i++)
  92                 if(tab[i].u == u)
  93                         return tab[i].t;
  94         return Runeerror;
  95 }
  96
  97 static int
  98 findindex(Rune *rstr, int size, Rune r)
  99 {
 100         int i;
 101
 102         for(i = 0; i < size; i++)
 103                 if(rstr[i] == r)
 104                         return i;
 105         return -1;
 106 }
 107
 108 void
 109 tune_in(int fd, long *, struct convert *out)
 110 {
 111         Biobuf b;
 112         Rune *r, *er, tr;
 113         int c, i;
 114
 115         r = runes;
 116         er = runes+N-3;
 117         Binit(&b, fd, OREAD);
 118         while((c = Bgetrune(&b)) != Beof){
 119                 ninput += b.runesize;
 120                 if(r >= er){
 121                         OUT(out, runes, r-runes);
 122                         r = runes;
 123                 }
 124                 if(c>=0xe210/**/ && c <= 0xe38c/**/ && (i = c%16) < nelem(t2)){
 125                         if(c >= 0xe380/**/){
 126                                 *r++ = 0x0b95/*க*/;
 127                                 *r++ = 0x0bcd/*்*/;
 128                                 *r++ = 0x0bb7/*ஷ*/;
 129                         }else
 130                                 *r++ = findbytune(t3, nelem(t3), c-i+1);
 131                         if(i != 1)
 132                                 *r++ = t2[i];
 133                 }else if((tr = findbytune(t1, nelem(t1), c)) != Runeerror)
 134                         *r++ = tr;
 135                 else switch(c){
 136                         case 0xe3d0/**/:
 137                                 *r++ = 0x0ba3/*ண*/; *r++ = 0x0bbe/*ா*/;
 138                                 break;
 139                         case 0xe3d1/**/:
 140                                 *r++ = 0x0bb1/*ற*/; *r++ = 0x0bbe/*ா*/;
 141                                 break;
 142                         case 0xe3d2/**/:
 143                                 *r++ = 0x0ba9/*ன*/; *r++ = 0x0bbe/*ா*/;
 144                                 break;
 145                         case 0xe3d4/**/:
 146                                 *r++ = 0x0ba3/*ண*/; *r++ = 0x0bc8/*ை*/;
 147                                 break;
 148                         case 0xe3d5/**/:
 149                                 *r++ = 0x0bb2/*ல*/; *r++ = 0x0bc8/*ை*/;
 150                                 break;
 151                         case 0xe3d6/**/:
 152                                 *r++ = 0x0bb3/*ள*/; *r++ = 0x0bc8/*ை*/;
 153                                 break;
 154                         case 0xe3d7/**/:
 155                                 *r++ = 0x0ba9/*ன*/; *r++ = 0x0bc8/*ை*/;
 156                                 break;
 157                         case 0xe38d/**/:
 158                                 *r++ = 0x0bb6/*ஶ*/; *r++ = 0x0bcd/*்*/; *r++ = 0x0bb0/*ர*/; *r++ = 0x0bc0/*ீ*/;
 159                                 break;
 160                         default:
 161                                 if(c >= 0xe200 && c <= 0xe3ff){
 162                                         if(squawk)
 163                                                 EPR "%s: rune 0x%x not in output cs\n", argv0, c);
 164                                         nerrors++;
 165                                         if(clean)
 166                                                 break;
 167                                         c = BADMAP;
 168                                 }
 169                                 *r++ = c;
 170                                 break;
 171                 }
 172         }
 173         if(r > runes)
 174                 OUT(out, runes, r-runes);
 175         OUT(out, runes, 0);
 176 }
 177
 178 void
 179 tune_out(Rune *r, int n, long *)
 180 {
 181         static int state = 0;
 182         static Rune lastr;
 183         Rune *er, tr, rr;
 184         char *p;
 185         int i;
 186
 187         nrunes += n;
 188         er = r+n;
 189         for(p = obuf; r < er; r++){
 190                 switch(state){
 191                 case 0:
 192                 case0:
 193                         if((tr = findbyuni(t3, nelem(t3), *r)) != Runeerror){
 194                                 lastr = tr;
 195                                 state = 1;
 196                         }else if(*r == 0x0b92/*ஒ*/){
 197                                 lastr = 0xe20a/**/;
 198                                 state = 3;
 199                         }else if((tr = findbyuni(t1, nelem(t1), *r)) != Runeerror)
 200                                 p += runetochar(p, &tr);
 201                         else
 202                                 p += runetochar(p, r);
 203                         break;
 204                 case 1:
 205                 case1:
 206                         if((i = findindex(t2, nelem(t2), *r)) != -1){
 207                                 if(lastr && lastr != Runeerror)
 208                                         lastr += i-1;
 209                                 if(*r ==0x0bc6/*ெ*/)
 210                                         state = 5;
 211                                 else if(*r ==0x0bc7/*ே*/)
 212                                         state = 4;
 213                                 else if(lastr == 0xe210/**/)
 214                                         state = 2;
 215                                 else if(lastr == 0xe340/**/)
 216                                         state = 6;
 217                                 else{
 218                                         if(lastr)
 219                                                 p += runetochar(p, &lastr);
 220                                         state = 0;
 221                                 }
 222                         }else if(lastr && lastr != Runeerror && (*r == 0x00b2/*²*/ || *r == 0x00b3/*³*/ || *r == 0x2074/*⁴*/)){
 223                                 if(squawk)
 224                                         EPR "%s: character <U+%.4X, U+%.4X> not in output cs\n", argv0, lastr, *r);
 225                                 lastr = clean ? 0 : Runeerror;
 226                                 nerrors++;
 227                         }else{
 228                                 if(lastr)
 229                                         p += runetochar(p, &lastr);
 230                                 state = 0;
 231                                 goto case0;
 232                         }
 233                         break;
 234                 case 2:
 235                         if(*r == 0x0bb7/*ஷ*/){
 236                                 lastr = 0xe381/**/;
 237                                 state = 1;
 238                                 break;
 239                         }
 240                         p += runetochar(p, &lastr);
 241                         state = 0;
 242                         goto case0;
 243                 case 3:
 244                         state = 0;
 245                         if(*r == 0x0bd7/*ௗ*/){
 246                                 rr = 0xe20c/**/;
 247                                 p += runetochar(p, &rr);
 248                                 break;
 249                         }
 250                         p += runetochar(p, &lastr);
 251                         goto case0;
 252                 case 4:
 253                         state = 0;
 254                         if(*r == 0x0bbe/*ா*/){
 255                                 if(lastr){
 256                                         if(lastr != Runeerror)
 257                                                 lastr += 3;
 258                                         p += runetochar(p, &lastr);
 259                                 }
 260                                 break;
 261                         }
 262                         if(lastr)
 263                                 p += runetochar(p, &lastr);
 264                         goto case0;
 265                 case 5:
 266                         state = 0;
 267                         if(*r == 0x0bbe/*ா*/ || *r == 0x0bd7/*ௗ*/){
 268                                 if(lastr){
 269                                         if(lastr != Runeerror)
 270                                                 lastr += *r == 0x0bbe/*ா*/ ? 3 : 5;
 271                                         p += runetochar(p, &lastr);
 272                                 }
 273                                 break;
 274                         }
 275                         if(lastr)
 276                                 p += runetochar(p, &lastr);
 277                         goto case0;
 278                 case 6:
 279                         if(*r == 0x0bb0/*ர*/){
 280                                 state = 7;
 281                                 break;
 282                         }
 283                         p += runetochar(p, &lastr);
 284                         state = 0;
 285                         goto case0;
 286                 case 7:
 287                         if(*r == 0x0bc0/*ீ*/){
 288                                 rr = 0xe38d/**/;
 289                                 p += runetochar(p, &rr);
 290                                 state = 0;
 291                                 break;
 292                         }
 293                         p += runetochar(p, &lastr);
 294                         lastr = 0xe2c1/**/;
 295                         state = 1;
 296                         goto case1;
 297                 }
 298         }
 299         if(n == 0 && state != 0){
 300                 if(lastr)
 301                         p += runetochar(p, &lastr);
 302                 state = 0;
 303         }
 304         noutput += p-obuf;
 305         write(1, obuf, p-obuf);
 306 }