| 1 | # include "e.h" |
| 2 | #define MAXLINE 1200 /* maximum input line */ |
| 3 | |
| 4 | char in[MAXLINE]; /* input buffer */ |
| 5 | int eqnexit(); |
| 6 | int noeqn; |
| 7 | |
| 8 | main(argc,argv) int argc; char *argv[];{ |
| 9 | |
| 10 | eqnexit(eqn(argc, argv)); |
| 11 | } |
| 12 | |
| 13 | eqnexit(n) { |
| 14 | #ifdef gcos |
| 15 | if (n) |
| 16 | fprintf(stderr, "run terminated due to eqn error\n"); |
| 17 | exit(0); |
| 18 | #endif |
| 19 | exit(n); |
| 20 | } |
| 21 | |
| 22 | eqn(argc,argv) int argc; char *argv[];{ |
| 23 | int i, type; |
| 24 | |
| 25 | setfile(argc,argv); |
| 26 | init_tbl(); /* install keywords in tables */ |
| 27 | while ((type=getline(in)) != EOF) { |
| 28 | eqline = linect; |
| 29 | if (in[0]=='.' && in[1]=='E' && in[2]=='Q') { |
| 30 | for (i=11; i<100; used[i++]=0); |
| 31 | printf("%s",in); |
| 32 | printf(".nr 99 \\n(.s\n.nr 98 \\n(.f\n"); |
| 33 | markline = 0; |
| 34 | init(); |
| 35 | yyparse(); |
| 36 | if (eqnreg>0) { |
| 37 | printf(".nr %d \\w'\\*(%d'\n", eqnreg, eqnreg); |
| 38 | /* printf(".if \\n(%d>\\n(.l .tm too-long eqn, file %s, between lines %d-%d\n", */ |
| 39 | /* eqnreg, svargv[ifile], eqline, linect); */ |
| 40 | printf(".nr MK %d\n", markline); /* for -ms macros */ |
| 41 | printf(".if %d>\\n(.v .ne %du\n", eqnht, eqnht); |
| 42 | printf(".rn %d 10\n", eqnreg); |
| 43 | if(!noeqn)printf("\\*(10\n"); |
| 44 | } |
| 45 | printf(".ps \\n(99\n.ft \\n(98\n"); |
| 46 | printf(".EN"); |
| 47 | if (lastchar == EOF) { |
| 48 | putchar('\n'); |
| 49 | break; |
| 50 | } |
| 51 | if (putchar(lastchar) != '\n') |
| 52 | while (putchar(gtc()) != '\n'); |
| 53 | } |
| 54 | else if (type == lefteq) |
| 55 | inline(); |
| 56 | else |
| 57 | printf("%s",in); |
| 58 | } |
| 59 | return(0); |
| 60 | } |
| 61 | |
| 62 | getline(s) register char *s; { |
| 63 | register c; |
| 64 | while((*s++=c=gtc())!='\n' && c!=EOF && c!=lefteq) |
| 65 | if (s >= in+MAXLINE) { |
| 66 | error( !FATAL, "input line too long: %.20s\n", in); |
| 67 | in[MAXLINE] = '\0'; |
| 68 | break; |
| 69 | } |
| 70 | if (c==lefteq) |
| 71 | s--; |
| 72 | *s++ = '\0'; |
| 73 | return(c); |
| 74 | } |
| 75 | |
| 76 | inline() { |
| 77 | int ds; |
| 78 | |
| 79 | printf(".nr 99 \\n(.s\n.nr 98 \\n(.f\n"); |
| 80 | ds = oalloc(); |
| 81 | printf(".rm %d \n", ds); |
| 82 | do{ |
| 83 | if (*in) |
| 84 | printf(".as %d \"%s\n", ds, in); |
| 85 | init(); |
| 86 | yyparse(); |
| 87 | if (eqnreg > 0) { |
| 88 | printf(".as %d \\*(%d\n", ds, eqnreg); |
| 89 | ofree(eqnreg); |
| 90 | } |
| 91 | printf(".ps \\n(99\n.ft \\n(98\n"); |
| 92 | } while (getline(in) == lefteq); |
| 93 | if (*in) |
| 94 | printf(".as %d \"%s", ds, in); |
| 95 | printf(".ps \\n(99\n.ft \\n(98\n"); |
| 96 | printf("\\*(%d\n", ds); |
| 97 | ofree(ds); |
| 98 | } |
| 99 | |
| 100 | putout(p1) int p1; { |
| 101 | extern int gsize, gfont; |
| 102 | int before, after; |
| 103 | if(dbg)printf(".\tanswer <- S%d, h=%d,b=%d\n",p1, eht[p1], ebase[p1]); |
| 104 | eqnht = eht[p1]; |
| 105 | printf(".ds %d \\x'0'", p1); |
| 106 | /* suppposed to leave room for a subscript or superscript */ |
| 107 | before = eht[p1] - ebase[p1] - VERT(3); /* 3 = 1.5 lines */ |
| 108 | if (before > 0) |
| 109 | printf("\\x'0-%du'", before); |
| 110 | printf("\\f%c\\s%d\\*(%d%s\\s\\n(99\\f\\n(98", |
| 111 | gfont, gsize, p1, rfont[p1] == ITAL ? "\\|" : ""); |
| 112 | after = ebase[p1] - VERT(1); |
| 113 | if (after > 0) |
| 114 | printf("\\x'%du'", after); |
| 115 | putchar('\n'); |
| 116 | eqnreg = p1; |
| 117 | } |
| 118 | |
| 119 | max(i,j) int i,j; { |
| 120 | return (i>j ? i : j); |
| 121 | } |
| 122 | |
| 123 | oalloc() { |
| 124 | int i; |
| 125 | for (i=11; i<100; i++) |
| 126 | if (used[i]++ == 0) return(i); |
| 127 | error( FATAL, "no eqn strings left", i); |
| 128 | return(0); |
| 129 | } |
| 130 | |
| 131 | ofree(n) int n; { |
| 132 | used[n] = 0; |
| 133 | } |
| 134 | |
| 135 | setps(p) int p; { |
| 136 | printf(".ps %d\n", EFFPS(p)); |
| 137 | } |
| 138 | |
| 139 | nrwid(n1, p, n2) int n1, p, n2; { |
| 140 | printf(".nr %d \\w'\\s%d\\*(%d'\n", n1, EFFPS(p), n2); |
| 141 | } |
| 142 | |
| 143 | setfile(argc, argv) int argc; char *argv[]; { |
| 144 | static char *nullstr = "-"; |
| 145 | |
| 146 | svargc = --argc; |
| 147 | svargv = argv; |
| 148 | while (svargc > 0 && svargv[1][0] == '-') { |
| 149 | switch (svargv[1][1]) { |
| 150 | |
| 151 | case 'd': lefteq=svargv[1][2]; righteq=svargv[1][3]; break; |
| 152 | case 's': gsize = atoi(&svargv[1][2]); break; |
| 153 | case 'p': deltaps = atoi(&svargv[1][2]); break; |
| 154 | case 'f': gfont = svargv[1][2]; break; |
| 155 | case 'e': noeqn++; break; |
| 156 | default: dbg = 1; |
| 157 | } |
| 158 | svargc--; |
| 159 | svargv++; |
| 160 | } |
| 161 | ifile = 1; |
| 162 | linect = 1; |
| 163 | if (svargc <= 0) { |
| 164 | curfile = stdin; |
| 165 | svargv[1] = nullstr; |
| 166 | } |
| 167 | else if ((curfile = fopen(svargv[1], "r")) == NULL) |
| 168 | error( FATAL,"can't open file %s", svargv[1]); |
| 169 | } |
| 170 | |
| 171 | yyerror() {;} |
| 172 | |
| 173 | init() { |
| 174 | ct = 0; |
| 175 | ps = gsize; |
| 176 | ft = gfont; |
| 177 | setps(ps); |
| 178 | printf(".ft %c\n", ft); |
| 179 | } |
| 180 | |
| 181 | error(fatal, s1, s2) int fatal; char *s1, *s2; { |
| 182 | if (fatal>0) |
| 183 | printf("eqn fatal error: "); |
| 184 | printf(s1,s2); |
| 185 | printf("\nfile %s, between lines %d and %d\n", |
| 186 | svargv[ifile], eqline, linect); |
| 187 | fprintf(stderr, "eqn: "); |
| 188 | if (fatal>0) |
| 189 | fprintf(stderr, "fatal error: "); |
| 190 | fprintf(stderr, s1, s2); |
| 191 | fprintf(stderr, "\nfile %s, between lines %d and %d\n", |
| 192 | svargv[ifile], eqline, linect); |
| 193 | if (fatal > 0) |
| 194 | eqnexit(1); |
| 195 | } |