Commit | Line | Data |
---|---|---|
b803c326 SL |
1 | #ifndef lint |
2 | static char sccsid[] = "@(#)parse.c 4.2 %G%"; | |
3 | #endif | |
3da1e57a KM |
4 | |
5 | #include "awk.def" | |
6 | #include "awk.h" | |
7 | #include "stdio.h" | |
8 | node *ALLOC(n) | |
9 | { | |
10 | register node *x; | |
11 | x = (node *) malloc(sizeof(node) + (n-1)*sizeof(node *)); | |
12 | if (x == NULL) | |
13 | error(FATAL, "out of space in ALLOC"); | |
14 | return(x); | |
15 | } | |
16 | node *exptostat(a) node *a; | |
17 | { | |
18 | a->ntype = NSTAT; | |
19 | return(a); | |
20 | } | |
21 | node *nullstat; | |
22 | node *node0(a) | |
23 | { | |
24 | register node *x; | |
25 | x=ALLOC(0); | |
26 | x->nnext = NULL; | |
27 | x->nobj=a; | |
28 | return(x); | |
29 | } | |
30 | node *node1(a,b) node *b; | |
31 | { | |
32 | register node *x; | |
33 | x=ALLOC(1); | |
34 | x->nnext = NULL; | |
35 | x->nobj=a; | |
36 | x->narg[0]=b; | |
37 | return(x); | |
38 | } | |
39 | node *node2(a,b,c) node *b, *c; | |
40 | { | |
41 | register node *x; | |
42 | x = ALLOC(2); | |
43 | x->nnext = NULL; | |
44 | x->nobj = a; | |
45 | x->narg[0] = b; | |
46 | x->narg[1] = c; | |
47 | return(x); | |
48 | } | |
49 | node *node3(a,b,c,d) node *b, *c, *d; | |
50 | { | |
51 | register node *x; | |
52 | x = ALLOC(3); | |
53 | x->nnext = NULL; | |
54 | x->nobj = a; | |
55 | x->narg[0] = b; | |
56 | x->narg[1] = c; | |
57 | x->narg[2] = d; | |
58 | return(x); | |
59 | } | |
60 | node *node4(a,b,c,d,e) node *b, *c, *d, *e; | |
61 | { | |
62 | register node *x; | |
63 | x = ALLOC(4); | |
64 | x->nnext = NULL; | |
65 | x->nobj = a; | |
66 | x->narg[0] = b; | |
67 | x->narg[1] = c; | |
68 | x->narg[2] = d; | |
69 | x->narg[3] = e; | |
70 | return(x); | |
71 | } | |
72 | node *stat3(a,b,c,d) node *b, *c, *d; | |
73 | { | |
74 | register node *x; | |
75 | x = node3(a,b,c,d); | |
76 | x->ntype = NSTAT; | |
77 | return(x); | |
78 | } | |
79 | node *op2(a,b,c) node *b, *c; | |
80 | { | |
81 | register node *x; | |
82 | x = node2(a,b,c); | |
83 | x->ntype = NEXPR; | |
84 | return(x); | |
85 | } | |
86 | node *op1(a,b) node *b; | |
87 | { | |
88 | register node *x; | |
89 | x = node1(a,b); | |
90 | x->ntype = NEXPR; | |
91 | return(x); | |
92 | } | |
93 | node *stat1(a,b) node *b; | |
94 | { | |
95 | register node *x; | |
96 | x = node1(a,b); | |
97 | x->ntype = NSTAT; | |
98 | return(x); | |
99 | } | |
100 | node *op3(a,b,c,d) node *b, *c, *d; | |
101 | { | |
102 | register node *x; | |
103 | x = node3(a,b,c,d); | |
104 | x->ntype = NEXPR; | |
105 | return(x); | |
106 | } | |
107 | node *stat2(a,b,c) node *b, *c; | |
108 | { | |
109 | register node *x; | |
110 | x = node2(a,b,c); | |
111 | x->ntype = NSTAT; | |
112 | return(x); | |
113 | } | |
114 | node *stat4(a,b,c,d,e) node *b, *c, *d, *e; | |
115 | { | |
116 | register node *x; | |
117 | x = node4(a,b,c,d,e); | |
118 | x->ntype = NSTAT; | |
119 | return(x); | |
120 | } | |
121 | node *valtonode(a, b) cell *a; | |
122 | { | |
123 | register node *x; | |
124 | x = node0(a); | |
125 | x->ntype = NVALUE; | |
126 | x->subtype = b; | |
127 | return(x); | |
128 | } | |
129 | node *pa2stat(a,b,c) node *a, *b, *c; | |
130 | { | |
131 | register node *x; | |
132 | x = node3(paircnt++, a, b, c); | |
133 | x->ntype = NPA2; | |
134 | return(x); | |
135 | } | |
136 | node *linkum(a,b) node *a, *b; | |
137 | { | |
138 | register node *c; | |
139 | if(a == NULL) return(b); | |
140 | else if(b == NULL) return(a); | |
141 | for(c=a; c->nnext != NULL; c=c->nnext); | |
142 | c->nnext = b; | |
143 | return(a); | |
144 | } | |
145 | node *genprint() | |
146 | { | |
147 | register node *x; | |
148 | x = stat2(PRINT,valtonode(lookup("$record", symtab, 0), CFLD), nullstat); | |
149 | return(x); | |
150 | } |