projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 4ae9aa77 | 1 | #ifndef lint |
| a21d3dfe | 2 | static char *sccsid = "@(#)var.c 3.2 83/12/06"; |
| 4ae9aa77 EW |
3 | #endif |
| 4 | ||
| 5 | #include "value.h" | |
| 6 | #include "var.h" | |
| 7 | #include "string.h" | |
| 8 | ||
| 9 | char *malloc(); | |
| 10 | ||
| 11 | struct var * | |
| 12 | var_set(name, v) | |
| 13 | char *name; | |
| 14 | struct value *v; | |
| 15 | { | |
| 16 | register struct var *r; | |
| 17 | ||
| 18 | if ((r = var_lookup(name)) == 0) { | |
| 19 | r = (struct var *) malloc(sizeof (struct var)); | |
| 20 | if (r == 0) | |
| 21 | return 0; | |
| 22 | if ((r->r_name = str_cpy(name)) == 0) { | |
| 23 | free((char *) r); | |
| 24 | return 0; | |
| 25 | } | |
| 26 | var_add(r); | |
| 27 | } | |
| 28 | r->r_val = *v; | |
| 29 | if (v->v_type == V_STR) { | |
| 30 | if ((r->r_val.v_str = str_cpy(v->v_str)) == 0) { | |
| 31 | free((char *) r); | |
| 32 | str_free(r->r_name); | |
| 33 | return 0; | |
| 34 | } | |
| 35 | } | |
| 36 | return r; | |
| 37 | } | |
| 38 | ||
| a21d3dfe EW |
39 | struct var * |
| 40 | var_setstr(name, str) | |
| 41 | char *name; | |
| 42 | char *str; | |
| 43 | { | |
| 44 | struct value v; | |
| 45 | ||
| 46 | v.v_type = V_STR; | |
| 47 | v.v_str = str; | |
| 48 | return var_set(name, &v); | |
| 49 | } | |
| 50 | ||
| 51 | struct var * | |
| 52 | var_setnum(name, num) | |
| 53 | char *name; | |
| 54 | int num; | |
| 55 | { | |
| 56 | struct value v; | |
| 57 | ||
| 58 | v.v_type = V_NUM; | |
| 59 | v.v_num = num; | |
| 60 | return var_set(name, &v); | |
| 61 | } | |
| 62 | ||
| 4ae9aa77 EW |
63 | struct var * |
| 64 | var_lookup(name) | |
| 65 | char *name; | |
| 66 | { | |
| 67 | register struct var *r; | |
| 68 | register cmp; | |
| 69 | ||
| 70 | for (r = var_head; r != 0;) { | |
| 71 | if ((cmp = strcmp(name, r->r_name)) < 0) | |
| 72 | r = r->r_left; | |
| 73 | else if (cmp > 0) | |
| 74 | r = r->r_right; | |
| 75 | else | |
| 76 | break; | |
| 77 | } | |
| 78 | return r; | |
| 79 | } | |
| 80 | ||
| 4ae9aa77 EW |
81 | var_walk1(r, func) |
| 82 | register struct var *r; | |
| 83 | int (*func)(); | |
| 84 | { | |
| 85 | if (r == 0) | |
| 86 | return; | |
| 87 | var_walk1(r->r_left, func); | |
| a21d3dfe | 88 | (*func)(r); |
| 4ae9aa77 EW |
89 | var_walk1(r->r_right, func); |
| 90 | } | |
| 91 | ||
| 92 | var_add(r) | |
| 93 | register struct var *r; | |
| 94 | { | |
| 95 | register struct var **p; | |
| 96 | ||
| 97 | for (p = &var_head; *p != 0;) { | |
| 98 | /* don't care about duplicate entries */ | |
| 99 | if (strcmp(r->r_name, (*p)->r_name) < 0) | |
| 100 | p = &(*p)->r_left; | |
| 101 | else | |
| 102 | p = &(*p)->r_right; | |
| 103 | } | |
| 104 | *p = r; | |
| a21d3dfe | 105 | r->r_left = r->r_right = 0; |
| 4ae9aa77 | 106 | } |