projects / unix-history / blame
| 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 | } |