Commit | Line | Data |
---|---|---|
3da1e57a KM |
1 | /* parse.c 4.1 82/05/07 */ |
2 | ||
3 | #include "awk.def" | |
4 | #include "awk.h" | |
5 | #include "stdio.h" | |
6 | node *ALLOC(n) | |
7 | { | |
8 | register node *x; | |
9 | x = (node *) malloc(sizeof(node) + (n-1)*sizeof(node *)); | |
10 | if (x == NULL) | |
11 | error(FATAL, "out of space in ALLOC"); | |
12 | return(x); | |
13 | } | |
14 | node *exptostat(a) node *a; | |
15 | { | |
16 | a->ntype = NSTAT; | |
17 | return(a); | |
18 | } | |
19 | node *nullstat; | |
20 | node *node0(a) | |
21 | { | |
22 | register node *x; | |
23 | x=ALLOC(0); | |
24 | x->nnext = NULL; | |
25 | x->nobj=a; | |
26 | return(x); | |
27 | } | |
28 | node *node1(a,b) node *b; | |
29 | { | |
30 | register node *x; | |
31 | x=ALLOC(1); | |
32 | x->nnext = NULL; | |
33 | x->nobj=a; | |
34 | x->narg[0]=b; | |
35 | return(x); | |
36 | } | |
37 | node *node2(a,b,c) node *b, *c; | |
38 | { | |
39 | register node *x; | |
40 | x = ALLOC(2); | |
41 | x->nnext = NULL; | |
42 | x->nobj = a; | |
43 | x->narg[0] = b; | |
44 | x->narg[1] = c; | |
45 | return(x); | |
46 | } | |
47 | node *node3(a,b,c,d) node *b, *c, *d; | |
48 | { | |
49 | register node *x; | |
50 | x = ALLOC(3); | |
51 | x->nnext = NULL; | |
52 | x->nobj = a; | |
53 | x->narg[0] = b; | |
54 | x->narg[1] = c; | |
55 | x->narg[2] = d; | |
56 | return(x); | |
57 | } | |
58 | node *node4(a,b,c,d,e) node *b, *c, *d, *e; | |
59 | { | |
60 | register node *x; | |
61 | x = ALLOC(4); | |
62 | x->nnext = NULL; | |
63 | x->nobj = a; | |
64 | x->narg[0] = b; | |
65 | x->narg[1] = c; | |
66 | x->narg[2] = d; | |
67 | x->narg[3] = e; | |
68 | return(x); | |
69 | } | |
70 | node *stat3(a,b,c,d) node *b, *c, *d; | |
71 | { | |
72 | register node *x; | |
73 | x = node3(a,b,c,d); | |
74 | x->ntype = NSTAT; | |
75 | return(x); | |
76 | } | |
77 | node *op2(a,b,c) node *b, *c; | |
78 | { | |
79 | register node *x; | |
80 | x = node2(a,b,c); | |
81 | x->ntype = NEXPR; | |
82 | return(x); | |
83 | } | |
84 | node *op1(a,b) node *b; | |
85 | { | |
86 | register node *x; | |
87 | x = node1(a,b); | |
88 | x->ntype = NEXPR; | |
89 | return(x); | |
90 | } | |
91 | node *stat1(a,b) node *b; | |
92 | { | |
93 | register node *x; | |
94 | x = node1(a,b); | |
95 | x->ntype = NSTAT; | |
96 | return(x); | |
97 | } | |
98 | node *op3(a,b,c,d) node *b, *c, *d; | |
99 | { | |
100 | register node *x; | |
101 | x = node3(a,b,c,d); | |
102 | x->ntype = NEXPR; | |
103 | return(x); | |
104 | } | |
105 | node *stat2(a,b,c) node *b, *c; | |
106 | { | |
107 | register node *x; | |
108 | x = node2(a,b,c); | |
109 | x->ntype = NSTAT; | |
110 | return(x); | |
111 | } | |
112 | node *stat4(a,b,c,d,e) node *b, *c, *d, *e; | |
113 | { | |
114 | register node *x; | |
115 | x = node4(a,b,c,d,e); | |
116 | x->ntype = NSTAT; | |
117 | return(x); | |
118 | } | |
119 | node *valtonode(a, b) cell *a; | |
120 | { | |
121 | register node *x; | |
122 | x = node0(a); | |
123 | x->ntype = NVALUE; | |
124 | x->subtype = b; | |
125 | return(x); | |
126 | } | |
127 | node *pa2stat(a,b,c) node *a, *b, *c; | |
128 | { | |
129 | register node *x; | |
130 | x = node3(paircnt++, a, b, c); | |
131 | x->ntype = NPA2; | |
132 | return(x); | |
133 | } | |
134 | node *linkum(a,b) node *a, *b; | |
135 | { | |
136 | register node *c; | |
137 | if(a == NULL) return(b); | |
138 | else if(b == NULL) return(a); | |
139 | for(c=a; c->nnext != NULL; c=c->nnext); | |
140 | c->nnext = b; | |
141 | return(a); | |
142 | } | |
143 | node *genprint() | |
144 | { | |
145 | register node *x; | |
146 | x = stat2(PRINT,valtonode(lookup("$record", symtab, 0), CFLD), nullstat); | |
147 | return(x); | |
148 | } |