projects / unix-history / blame
| 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 | } |