/*
* Now our scanpage routine.
*/
static void
pscanpage(void)
{
register shalfword cmd;
register chardesctype *cd;
register fontmaptype *cfnt = 0;
integer fnt;
integer mychar;
register frametype *frp = frames;
#ifdef DEBUG
if (dd(D_PAGE))
#ifdef SHORTINT
fprintf(stderr,"PPrescanning page %ld\n", pagenum);
#else /* ~SHORTINT */
fprintf(stderr,"PPrescanning page %d\n", pagenum);
#endif /* ~SHORTINT */
#endif /* DEBUG */
curfnt = NULL;
curpos = NULL;
bopcolor(0);
while (1) {
switch (cmd=dvibyte()) {
case 255: /* pTeX's dir or undefined */
if (!noptex) {
dvibyte();
break;
}
/* illegal commands */
case 131: case 136: case 139: /* set4, put4, bop */
case 247: case 248: case 249: /* pre, post, post_post */
case 250: case 251: case 252: case 253: case 254: /* undefined */
sprintf(errbuf,
"! DVI file contains unexpected command (%d)",cmd);
error(errbuf);
case 132: case 137: /* eight-byte commands setrule, putrule */
dvibyte();
dvibyte();
dvibyte();
dvibyte();
case 146: case 151: case 156: case 160: case 165: case 170:
/* four-byte commands right4, w4, x4, down4, y4, z4 */
dvibyte();
case 145: case 150: case 155: case 159: case 164: case 169:
/* three-byte commands right3, w3, x3, down3, y3, z3 */
dvibyte();
case 144: case 149: case 154: case 158: case 163: case 168:
/* two-byte commands right2, w2, x2, down2, y2, z2 */
dvibyte();
case 143: case 148: case 153: case 157: case 162: case 167:
/* one-byte commands right1, w1, x1, down1, y1, z1 */
dvibyte();
case 147: case 152: case 161: case 166: /* w0, x0, y0, z0 */
case 138: case 141: case 142: /* nop, push, pop */
break;
case 130: case 135: /* set3, put3 */
if (noptex) {
sprintf(errbuf,
"! DVI file contains unexpected pTeX command (%d)",cmd);
error(errbuf);
}
mychar = dvibyte(); mychar = (mychar << 8) + dvibyte();
mychar = (mychar << 8) + dvibyte();
goto dochar;
case 129: case 134: /* set2, put2 */
if (noomega && noptex) {
sprintf(errbuf,
"! DVI file contains unexpected command (%d)",cmd);
error(errbuf);
}
mychar = dvibyte(); mychar = (mychar << 8) + dvibyte();
goto dochar;
case 128: case 133: cmd = dvibyte(); /* set1, put1 commands drops through */
default: /* these are commands 0 (setchar0) thru 127 (setchar 127) */
mychar = cmd;
dochar:
if (curfnt==NULL)
error("! Bad DVI file: no font selected");
if (mychar>=curfnt->maxchars) {
sprintf(errbuf,"! invalid char %d from font %s", mychar, curfnt->name);
error(errbuf);
}
if (curfnt->loaded == 2) { /* scanning a virtual font character */
frp->curp = curpos;
frp->curl = curlim;
frp->ff = ffont;
frp->curf = curfnt;
if (++frp == &frames[MAXFRAME] )
error("! virtual recursion stack overflow");
cd = curfnt->chardesc + mychar;
if (cd->packptr == 0) {
fprintf(stderr, "Wrong char code: %04X\n", mychar);
error("! a non-existent virtual char is being used; check vf/tfm files");
}
curpos = cd->packptr + 2;
curlim = curpos + (256*(long)(*cd->packptr)+(*(cd->packptr+1)));
ffont = curfnt->localfonts;
if (ffont==NULL)
curfnt = NULL;
else
ppreselectfont(ffont->desc);
} else if (curfnt->loaded == 3)
curfnt->chardesc[mychar].flags = EXISTS;
break;
case 171: case 172: case 173: case 174: case 175: case 176: case 177:
case 178: case 179: case 180: case 181: case 182: case 183: case 184:
case 185: case 186: case 187: case 188: case 189: case 190: case 191:
case 192: case 193: case 194: case 195: case 196: case 197: case 198:
case 199: case 200: case 201: case 202: case 203: case 204: case 205:
case 206: case 207: case 208: case 209: case 210: case 211: case 212:
case 213: case 214: case 215: case 216: case 217: case 218: case 219:
case 220: case 221: case 222: case 223: case 224: case 225: case 226:
case 227: case 228: case 229: case 230: case 231: case 232: case 233:
case 234: case 235: case 236: case 237: case 238: /* font selection commands */
if (cmd < 235) fnt = cmd - 171; /* fntnum0 thru fntnum63 */
else {
fnt = dvibyte(); /* fnt1 */
while (cmd-- > 235)
fnt = (fnt << 8) + dvibyte();
}
for (cfnt=ffont; cfnt; cfnt = cfnt->next)
if (cfnt->fontnum == fnt) goto fontfound;
error("! no font selected");
fontfound: curfnt = cfnt->desc;
ppreselectfont(curfnt);
break;
case 239: predospecial((integer)dvibyte(), 1); break; /* xxx1 */
case 240: predospecial((integer)twobytes(), 1); break; /* xxx2 */
case 241: predospecial(threebytes(), 1); break; /* xxx3 */
case 242: predospecial(signedquad(), 1); break; /* xxx4 */
case 243: case 244: case 245: case 246: fontdef(cmd-242); break; /* fntdef1 */
case 140: /* eop or end of virtual char */
if (curpos) {
--frp;
curfnt = frp->curf;
ffont = frp->ff;
curlim = frp->curl;
curpos = frp->curp;
break;
}
return;
}
}
}
void skippage() /* skip past one page */
{
register int opcode;
while ((opcode = (int) get1()) != EOP) {
if (opcode > POST_POST)
errorexit(illop);
else
switch (opcode) {
case SET1 :
case PUT1 :
case RIGHT1 :
case W1 :
case X1 :
case DOWN1 :
case Y1 :
case Z1 : /* assume FNT change can also be skipped */
case FNT1 : mseek(DVIfile, 1L, relative); break;
case SET2 :
case PUT2 :
case RIGHT2 :
case W2 :
case X2 :
case DOWN2 :
case Y2 :
case Z2 :
case FNT2 : mseek(DVIfile, 2L, relative); break;
case SET3 :
case PUT3 :
case RIGHT3 :
case W3 :
case X3 :
case DOWN3 :
case Y3 :
case Z3 :
case FNT3 : mseek(DVIfile, 3L, relative); break;
case SET4 :
case PUT4 :
case RIGHT4 :
case W4 :
case X4 :
case DOWN4 :
case Y4 :
case Z4 :
case FNT4 : mseek(DVIfile, 4L, relative); break;
case SET_RULE :
case PUT_RULE : mseek(DVIfile, 8L, relative); break;
case BOP : errorexit(bdbop); break;
case XXX1 : mseek(DVIfile, get1(), relative); break;
case XXX2 : mseek(DVIfile, get2(), relative); break;
case XXX3 : mseek(DVIfile, get3(), relative); break;
case XXX4 : mseek(DVIfile, get4(), relative); break;
case FNT_DEF1 :
case FNT_DEF2 :
case FNT_DEF3 :
case FNT_DEF4 : fontdef(opcode - FNT_DEF1 + 1); break;
case PRE : errorexit(bdpre); break;
case POST : errorexit(bdpst); break;
case POST_POST: errorexit(bdpp); break;
}
}
} /* skippage */
/*
* And now the big routine.
*/
void
skippage()
{
register shalfword cmd ;
register integer i ;
#ifdef DEBUG
if (dd(D_PAGE))
#ifdef SHORTINT
(void)fprintf(stderr,"Skipping page %ld\n", pagenum) ;
#else /* ~SHORTINT */
(void)fprintf(stderr,"Skipping page %d\n", pagenum) ;
#endif /* ~SHORTINT */
#endif /* DEBUG */
skipover(40) ; /* skip rest of bop command */
while ((cmd=dvibyte())!=140) {
switch (cmd) {
/* illegal options */
case 129: case 130: case 131: case 134: case 135: case 136: case 139:
case 247: case 248: case 249: case 250: case 251: case 252: case 253:
case 254: case 255:
(void)sprintf(errbuf,
#ifdef SHORTINT
"! DVI file contains unexpected command (%ld)",cmd) ;
#else /* ~SHORTINT */
"! DVI file contains unexpected command (%d)",cmd) ;
#endif /* ~SHORTINT */
error(errbuf) ;
/* eight byte commands */
case 132: case 137:
cmd = dvibyte() ;
cmd = dvibyte() ;
cmd = dvibyte() ;
cmd = dvibyte() ;
/* four byte commands */
case 146: case 151: case 156: case 160: case 165: case 170: case 238:
cmd = dvibyte() ;
/* three byte commands */
case 145: case 150: case 155: case 159: case 164: case 169: case 237:
cmd = dvibyte() ;
/* two byte commands */
case 144: case 149: case 154: case 158: case 163: case 168: case 236:
cmd = dvibyte() ;
/* one byte commands */
case 128: case 133: case 143: case 148: case 153: case 157: case 162:
case 167: case 235:
cmd = dvibyte() ;
break ;
/* specials */
case 239: i = dvibyte() ; predospecial(i, 0) ; break ;
case 240: i = twobytes() ; predospecial(i, 0) ; break ;
case 241: i = threebytes() ; predospecial(i, 0) ; break ;
case 242: i = signedquad() ; predospecial(i, 0) ; break ;
/* font definition */
case 243: case 244: case 245: case 246:
fontdef(cmd - 242) ;
break ;
default: ;
}
}
}
void dopage()
{
while ((opcode = (int) get1()) != EOP) { /* process page until eop */
if (opcode <= LASTCHAR)
dochar((char) opcode);
else if ((opcode >= FONT_00) && (opcode <= FONT_63))
setfont(opcode - FONT_00);
else if (opcode > POST_POST)
errorexit(illop);
else
switch (opcode) {
case SET1 : setchar(get1()); break;
case SET2 : setchar(get2()); break;
case SET3 : setchar(get3()); break;
case SET4 : setchar(get4()); break;
case SET_RULE : { long height = sget4();
rule(MOVE, sget4(), height); break;
}
case PUT1 : putcharacter(get1()); break;
case PUT2 : putcharacter(get2()); break;
case PUT3 : putcharacter(get3()); break;
case PUT4 : putcharacter(get4()); break;
case PUT_RULE : { long height = sget4();
rule(STAY, sget4(), height); break;
}
case NOP : break; /* no-op */
case BOP : errorexit(bdbop); break;
/* case EOP : break; strange place to have EOP */
case PUSH : if (sptr >= stackmax) /* push */
errorexit(stkof);
stack[sptr].hh = h;
stack[sptr].vv = v;
stack[sptr].ww = w;
stack[sptr].xx = x;
stack[sptr].yy = y;
stack[sptr].zz = z;
sptr++;
break;
case POP : if (sptr == 0) /* pop */
errorexit(stkuf);
sptr--;
h = stack[sptr].hh;
v = stack[sptr].vv;
w = stack[sptr].ww;
x = stack[sptr].xx;
y = stack[sptr].yy;
z = stack[sptr].zz;
break;
case RIGHT1 : (void) horizontalmove(sget1()); break;
case RIGHT2 : (void) horizontalmove(sget2()); break;
case RIGHT3 : (void) horizontalmove(sget3()); break;
case RIGHT4 : (void) horizontalmove(sget4()); break;
case W0 : h += w; break;
case W1 : w = horizontalmove(sget1()); break;
case W2 : w = horizontalmove(sget2()); break;
case W3 : w = horizontalmove(sget3()); break;
case W4 : w = horizontalmove(sget4()); break;
case X0 : h += x; break;
case X1 : x = horizontalmove(sget1()); break;
case X2 : x = horizontalmove(sget2()); break;
case X3 : x = horizontalmove(sget3()); break;
case X4 : x = horizontalmove(sget4()); break;
case DOWN1 : v += sget1(); break;
case DOWN2 : v += sget2(); break;
case DOWN3 : v += sget3(); break;
case DOWN4 : v += sget4(); break;
case Y0 : v += y; break;
case Y1 : y = sget1(); v += y; break;
case Y2 : y = sget2(); v += y; break;
case Y3 : y = sget3(); v += y; break;
case Y4 : y = sget4(); v += y; break;
case Z0 : v += z; break;
case Z1 : z = sget1(); v += z; break;
case Z2 : z = sget2(); v += z; break;
case Z3 : z = sget3(); v += z; break;
case Z4 : z = sget4(); v += z; break;
case FNT1 :
case FNT2 :
case FNT3 :
case FNT4 : setfont(num(opcode - FNT1 + 1));
break;
case XXX1 : mseek(DVIfile, get1(), relative); break;
case XXX2 : mseek(DVIfile, get2(), relative); break;
case XXX3 : mseek(DVIfile, get3(), relative); break;
case XXX4 : mseek(DVIfile, get4(), relative); break;
case FNT_DEF1 :
case FNT_DEF2 :
case FNT_DEF3 :
case FNT_DEF4 : fontdef(opcode - FNT_DEF1 + 1);
break;
case PRE : errorexit(bdpre); break;
case POST : errorexit(bdpst); break;
case POST_POST: errorexit(bdpp); break;
}
}
} /* dopage */
/*
* And now the big routine.
*/
void
skippage(void)
{
register shalfword cmd;
register integer i;
#ifdef DEBUG
if (dd(D_PAGE))
#ifdef SHORTINT
fprintf(stderr,"Skipping page %ld\n", pagenum);
#else /* ~SHORTINT */
fprintf(stderr,"Skipping page %d\n", pagenum);
#endif /* ~SHORTINT */
#endif /* DEBUG */
/* skipover(40); skip rest of bop command? how did this get in here? */
bopcolor(0);
while ((cmd=dvibyte())!=140) {
switch (cmd) {
case 255: /* pTeX's dir or undefined */
if (!noptex) {
cmd = dvibyte();
break;
}
/* illegal commands */
case 139: case 247: case 248: case 249: /* bop, pre, post, post_post */
case 250: case 251: case 252: case 253: case 254: /* undefined */
sprintf(errbuf,
"! DVI file contains unexpected command (%d)",cmd);
error(errbuf);
/* eight byte commands */
case 132: case 137:
cmd = dvibyte();
cmd = dvibyte();
cmd = dvibyte();
cmd = dvibyte();
/* four byte commands */
case 131: case 136:
case 146: case 151: case 156: case 160: case 165: case 170: case 238:
cmd = dvibyte();
/* three byte commands */
case 130: case 135:
case 145: case 150: case 155: case 159: case 164: case 169: case 237:
cmd = dvibyte();
/* two byte commands */
case 129: case 134:
case 144: case 149: case 154: case 158: case 163: case 168: case 236:
cmd = dvibyte();
/* one byte commands */
case 128: case 133:
case 143: case 148: case 153: case 157: case 162: case 167: case 235:
cmd = dvibyte();
break;
/* specials */
case 239: i = dvibyte(); predospecial(i, 0); break;
case 240: i = twobytes(); predospecial(i, 0); break;
case 241: i = threebytes(); predospecial(i, 0); break;
case 242: i = signedquad(); predospecial(i, 0); break;
/* font definition */
case 243: case 244: case 245: case 246:
fontdef(cmd - 242);
break;
default:;
}
}
}