4.3BSD - /usr/src/usr.bin/nroff/n6.c

   1: #ifndef lint
   2: static char sccsid[] = "@(#)n6.c	4.2 11/26/82";
   3: #endif lint
   4: 
   5: #include "tdef.h"
   6: extern
   7: #include "d.h"
   8: extern
   9: #include "v.h"
  10: #ifdef NROFF
  11: extern
  12: #include "tw.h"
  13: #endif
  14: 
  15: /*
  16: troff6.c
  17: 
  18: width functions, sizes and fonts
  19: */
  20: 
  21: extern  int     inchar[LNSIZE], *pinchar;       /* XXX */
  22: extern int eschar;
  23: extern int widthp;
  24: extern int ohc;
  25: extern int xfont;
  26: extern int smnt;
  27: extern int setwdf;
  28: extern char trtab[];
  29: extern int chbits;
  30: extern int nonumb;
  31: extern int noscale;
  32: extern int font;
  33: extern int font1;
  34: extern int pts;
  35: extern int sps;
  36: extern int nlflg;
  37: extern int nform;
  38: extern int dfact;
  39: extern int dfactd;
  40: extern int lss;
  41: extern int lss1;
  42: extern int vflag;
  43: extern int ch0;
  44: extern int level;
  45: extern int ch;
  46: extern int res;
  47: extern int xxx;
  48: int fontlab[] = {'R','I','B','S',0};
  49: 
  50: width(c)
  51: int c;
  52: {
  53:     register i,j,k;
  54: 
  55:     j = c;
  56:     k = 0;
  57:     if(j & MOT){
  58:         if(j & VMOT)goto rtn;
  59:         k = j & ~MOTV;
  60:         if(j & NMOT)k = -k;
  61:         goto rtn;
  62:     }
  63:     if((i = (j & CMASK)) == 010){
  64:         k = -widthp;
  65:         goto rtn;
  66:     }
  67:     if(i == PRESC)i = eschar;
  68:     if((i == ohc) ||
  69:        (i >= 0370))goto rtn;
  70:     if(j & ZBIT)goto rtn;
  71:     i = trtab[i] & BMASK;
  72:     if(i < 040)goto rtn;
  73:     if (t.codetab[i-32])
  74:         k = (*(t.codetab[i-32]) & 0177) * t.Char;
  75:     else
  76:         k = 0;
  77:     widthp = k;
  78: rtn:
  79:     return(k);
  80: }
  81: setch(){
  82:     register i,*j,k;
  83:     extern int chtab[];
  84: 
  85:     if((i = getrq()) == 0)return(0);
  86:     for(j=chtab;*j != i;j++)if(*(j++) == 0)return(0);
  87:     k = *(++j) | chbits;
  88:     return(k);
  89: }
  90: find(i,j)
  91: int i,j[];
  92: {
  93:     register k;
  94: 
  95:     if(((k = i-'0') >= 1) && (k <= 4) && (k != smnt))return(--k);
  96:     for(k=0; j[k] != i; k++)if(j[k] == 0)return(-1);
  97:     return(k);
  98: }
  99: mchbits(){
 100:     chbits = (((pts)<<2) | font) << (BYTE + 1);
 101:     sps = width(' ' | chbits);
 102: }
 103: setps(){
 104:     register i,j;
 105: 
 106:     if((((i=getch() & CMASK) == '+')  || (i == '-')) &&
 107:       (((j=(ch = getch() & CMASK) - '0') >= 0) && (j <= 9))){
 108:         ch = 0;
 109:         return;
 110:     }
 111:     if((i -= '0') == 0){
 112:         return;
 113:     }
 114:     if((i > 0) && (i <= 9)){
 115:         if((i <= 3) &&
 116:           ((j=(ch = getch() & CMASK) - '0') >= 0) && (j <= 9)){
 117:             i = 10*i +j;
 118:             ch = 0;
 119:         }
 120:     }
 121: }
 122: caseft(){
 123:     skip();
 124:     setfont(1);
 125: }
 126: setfont(a)
 127: int a;
 128: {
 129:     register i,j;
 130: 
 131:     if(a)i = getrq();
 132:         else i = getsn();
 133:     if(!i || (i == 'P')){
 134:         j = font1;
 135:         goto s0;
 136:     }
 137:     if(i == 'S')return;
 138:     if((j = find(i,fontlab))  == -1)return;
 139: s0:
 140:     font1 = font;
 141:     font = j;
 142:     mchbits();
 143: }
 144: setwd(){
 145:     register i, base, wid;
 146:     int delim, em, k;
 147:     int savlevel, savhp, savfont, savfont1;
 148:     int *savpinchar, *p, *q, tempinchar[LNSIZE];    /* XXX */
 149: 
 150:     base = v.st = v.sb = wid = v.ct = 0;
 151:     if((delim = getch() & CMASK) & MOT)return;
 152:     savhp = v.hp;
 153:     savpinchar = pinchar;   /* XXX */
 154:     for (p=inchar, q=tempinchar; p < pinchar; ) /* XXX */
 155:         *q++ = *p++;    /* XXX */
 156:     pinchar = inchar;   /* XXX */
 157:     savlevel = level;
 158:     v.hp = level = 0;
 159:     savfont = font;
 160:     savfont1 = font1;
 161:     setwdf++;
 162:     while((((i = getch()) & CMASK) != delim) && !nlflg){
 163:         wid += width(i);
 164:         if(!(i & MOT)){
 165:             em = 2*t.Halfline;
 166:         }else if(i & VMOT){
 167:             k = i & ~MOTV;
 168:             if(i & NMOT)k = -k;
 169:             base -= k;
 170:             em = 0;
 171:         }else continue;
 172:         if(base < v.sb)v.sb = base;
 173:         if((k=base + em) > v.st)v.st = k;
 174:     }
 175:     nform = 0;
 176:     setn1(wid);
 177:     v.hp = savhp;
 178:     pinchar = savpinchar;   /* XXX */
 179:     for (p=inchar, q=tempinchar; p < pinchar; ) /* XXX */
 180:         *p++ = *q++;    /* XXX */
 181:     level = savlevel;
 182:     font = savfont;
 183:     font1 = savfont1;
 184:     mchbits();
 185:     setwdf = 0;
 186: }
 187: vmot(){
 188:     dfact = lss;
 189:     vflag++;
 190:     return(mot());
 191: }
 192: hmot(){
 193:     dfact = EM;
 194:     return(mot());
 195: }
 196: mot(){
 197:     register i, j;
 198: 
 199:     j = HOR;
 200:     getch(); /*eat delim*/
 201:     if(i = atoi()){
 202:         if(vflag)j = VERT;
 203:         i = makem(quant(i,j));
 204:     }
 205:     getch();
 206:     vflag = 0;
 207:     dfact = 1;
 208:     return(i);
 209: }
 210: sethl(k)
 211: int k;
 212: {
 213:     register i;
 214: 
 215:     i = t.Halfline;
 216:     if(k == 'u')i = -i;
 217:     else if(k == 'r')i = -2*i;
 218:     vflag++;
 219:     i = makem(i);
 220:     vflag = 0;
 221:     return(i);
 222: }
 223: makem(i)
 224: int i;
 225: {
 226:     register j;
 227: 
 228:     if((j = i) < 0)j = -j;
 229:     j = (j & ~MOTV) | MOT;
 230:     if(i < 0)j |= NMOT;
 231:     if(vflag)j |= VMOT;
 232:     return(j);
 233: }
 234: casefp(){
 235:     register i, j;
 236: 
 237:     skip();
 238:     if(((i = (getch() & CMASK) - '0' -1) < 0) || (i >3))return;
 239:     if(skip() || !(j = getrq()))return;
 240:     fontlab[i] = j;
 241: }
 242: casevs(){
 243:     register i;
 244: 
 245:     skip();
 246:     vflag++;
 247:     dfact = INCH; /*default scaling is points!*/
 248:     dfactd = 72;
 249:     res = VERT;
 250:     i = inumb(&lss);
 251:     if(nonumb)i = lss1;
 252:     if(i < VERT)i = VERT;
 253:     lss1 = lss;
 254:     lss = i;
 255: }
 256: xlss(){
 257:     register i, j;
 258: 
 259:     getch();
 260:     dfact = lss;
 261:     i = quant(atoi(),VERT);
 262:     dfact = 1;
 263:     getch();
 264:     if((j = i) < 0)j = -j;
 265:     ch0 = ((j & 03700)<<3) | HX;
 266:     if(i < 0)ch0 |= 040000;
 267:     return(((j & 077)<<9) | LX);
 268: }
 269: casefz(){}
 270: caseps(){}
 271: caselg(){}
 272: casecs(){}
 273: casebd(){}
 274: casess(){}
 275: getlg(i)
 276: int i;
 277: {
 278:     return(i);
 279: }

Defined functions

Defined variables