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Up to [CSRG BSD Unix] / 40BSD / cmd / eqn|
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1.1 root 1: %{#
2: #include "e.h"
3: #
4: int fromflg;
5: %}
6: %term CONTIG QTEXT SPACE THIN TAB
7: %term MATRIX LCOL CCOL RCOL COL
8: %term MARK LINEUP
9: %term SUM INT PROD UNION INTER
10: %term LPILE PILE CPILE RPILE ABOVE
11: %term DEFINE TDEFINE NDEFINE DELIM GSIZE GFONT INCLUDE
12: %right FROM TO
13: %left OVER SQRT
14: %right SUP SUB
15: %right SIZE FONT ROMAN ITALIC BOLD FAT
16: %right UP DOWN BACK FWD
17: %left LEFT RIGHT
18: %right DOT DOTDOT HAT TILDE BAR UNDER VEC DYAD
19:
20: %%
21:
22: stuff : eqn { putout($1); }
23: | error { error(!FATAL, "syntax error"); }
24: | { eqnreg = 0; }
25: ;
26:
27: eqn : box
28: | eqn box { eqnbox($1, $2, 0); }
29: | eqn lineupbox { eqnbox($1, $2, 1); }
30: | LINEUP { lineup(0); }
31: ;
32:
33: lineupbox: LINEUP box { $$ = $2; lineup(1); }
34: ;
35:
36: matrix : MATRIX { $$ = ct; } ;
37:
38: collist : column
39: | collist column
40: ;
41:
42: column : lcol '{' list '}' { column('L', $1); }
43: | ccol '{' list '}' { column('C', $1); }
44: | rcol '{' list '}' { column('R', $1); }
45: | col '{' list '}' { column('-', $1); }
46: ;
47:
48: lcol : LCOL { $$ = ct++; } ;
49: ccol : CCOL { $$ = ct++; } ;
50: rcol : RCOL { $$ = ct++; } ;
51: col : COL { $$ = ct++; } ;
52:
53: sbox : sup box %prec SUP { $$ = $2; }
54: ;
55:
56: tbox : to box %prec TO { $$ = $2; }
57: | %prec FROM { $$ = 0; }
58: ;
59:
60: box : box OVER box { boverb($1, $3); }
61: | MARK box { mark($2); }
62: | size box %prec SIZE { size($1, $2); }
63: | font box %prec FONT { font($1, $2); }
64: | FAT box { fatbox($2); }
65: | SQRT box { sqrt($2); }
66: | lpile '{' list '}' { lpile('L', $1, ct); ct = $1; }
67: | cpile '{' list '}' { lpile('C', $1, ct); ct = $1; }
68: | rpile '{' list '}' { lpile('R', $1, ct); ct = $1; }
69: | pile '{' list '}' { lpile('-', $1, ct); ct = $1; }
70: | box sub box sbox %prec SUB { shift2($1, $3, $4); }
71: | box sub box %prec SUB { bshiftb($1, $2, $3); }
72: | box sup box %prec SUP { bshiftb($1, $2, $3); }
73: | int sub box sbox %prec SUB { integral($1, $3, $4); }
74: | int sub box %prec SUB { integral($1, $3, 0); }
75: | int sup box %prec SUP { integral($1, 0, $3); }
76: | int { integral($1, 0, 0); }
77: | left eqn right { paren($1, $2, $3); }
78: | pbox
79: | box from box tbox %prec FROM { fromto($1, $3, $4); fromflg=0; }
80: | box to box %prec TO { fromto($1, 0, $3); }
81: | box diacrit { diacrit($1, $2); }
82: | fwd box %prec UP { move(FWD, $1, $2); }
83: | up box %prec UP { move(UP, $1, $2); }
84: | back box %prec UP { move(BACK, $1, $2); }
85: | down box %prec UP { move(DOWN, $1, $2); }
86: | matrix '{' collist '}' { matrix($1); }
87: ;
88:
89: int : INT { setintegral(); }
90: ;
91:
92: fwd : FWD text { $$ = atoi((char *) $1); } ;
93: up : UP text { $$ = atoi((char *) $1); } ;
94: back : BACK text { $$ = atoi((char *) $1); } ;
95: down : DOWN text { $$ = atoi((char *) $1); } ;
96:
97: diacrit : HAT { $$ = HAT; }
98: | VEC { $$ = VEC; }
99: | DYAD { $$ = DYAD; }
100: | BAR { $$ = BAR; }
101: | UNDER { $$ = UNDER; } /* under bar */
102: | DOT { $$ = DOT; }
103: | TILDE { $$ = TILDE; }
104: | DOTDOT { $$ = DOTDOT; } /* umlaut = double dot */
105: ;
106:
107: from : FROM { $$=ps; ps -= 3; fromflg = 1;
108: if(dbg)printf(".\tfrom: old ps %d, new ps %d, fflg %d\n", $$, ps, fromflg);
109: }
110: ;
111:
112: to : TO { $$=ps; if(fromflg==0)ps -= 3;
113: if(dbg)printf(".\tto: old ps %d, new ps %d\n", $$, ps);
114: }
115: ;
116:
117: left : LEFT text { $$ = ((char *)$2)[0]; }
118: | LEFT '{' { $$ = '{'; }
119: ;
120:
121: right : RIGHT text { $$ = ((char *)$2)[0]; }
122: | RIGHT '}' { $$ = '}'; }
123: | { $$ = 0; }
124: ;
125:
126: list : eqn { lp[ct++] = $1; }
127: | list ABOVE eqn { lp[ct++] = $3; }
128: ;
129:
130: lpile : LPILE { $$ = ct; } ;
131: cpile : CPILE { $$ = ct; } ;
132: pile : PILE { $$ = ct; } ;
133: rpile : RPILE { $$ = ct; } ;
134:
135: size : SIZE text { $$ = ps; setsize((char *) $2); }
136: ;
137:
138: font : ROMAN { setfont(ROM); }
139: | ITALIC { setfont(ITAL); }
140: | BOLD { setfont(BLD); }
141: | FONT text { setfont(((char *)$2)[0]); }
142: ;
143:
144: sub : SUB { shift(SUB); }
145: ;
146:
147: sup : SUP { shift(SUP); }
148: ;
149:
150: pbox : '{' eqn '}' { $$ = $2; }
151: | QTEXT { text(QTEXT, (char *) $1); }
152: | CONTIG { text(CONTIG, (char *) $1); }
153: | SPACE { text(SPACE, 0); }
154: | THIN { text(THIN, 0); }
155: | TAB { text(TAB, 0); }
156: | SUM { funny(SUM); }
157: | PROD { funny(PROD); }
158: | UNION { funny(UNION); }
159: | INTER { funny(INTER); } /* intersection */
160: ;
161:
162: text : CONTIG
163: | QTEXT
164: ;
165:
166: %%
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