HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| e745ede7 DL |
1 | /* Copyright Massachusetts Institute of Technology 1985 */ |
| 2 | ||
| 0ff3f435 GM |
3 | #include "copyright.h" |
| 4 | ||
| e745ede7 | 5 | |
| 55660072 | 6 | #include "XMenuInt.h" |
| e745ede7 | 7 | #include <X11/Xresource.h> |
| e745ede7 DL |
8 | #include <errno.h> |
| 9 | ||
| 10 | #ifndef NULL | |
| 11 | #define NULL 0 | |
| 12 | #endif | |
| 13 | ||
| e745ede7 DL |
14 | /* |
| 15 | * XMakeAssoc - Insert data into an XAssocTable keyed on an XId. | |
| 16 | * Data is inserted into the table only once. Redundant inserts are | |
| 17 | * meaningless (but cause no problems). The queue in each association | |
| 18 | * bucket is sorted (lowest XId to highest XId). | |
| 19 | */ | |
| 76320384 | 20 | void |
| 55660072 | 21 | XMakeAssoc(register Display *dpy, register XAssocTable *table, register XID x_id, register void *data) |
| e745ede7 DL |
22 | { |
| 23 | int hash; | |
| 24 | register XAssoc *bucket; | |
| 25 | register XAssoc *Entry; | |
| 26 | register XAssoc *new_entry; | |
| 177c0ea7 | 27 | |
| e745ede7 DL |
28 | /* Hash the XId to get the bucket number. */ |
| 29 | hash = x_id & (table->size - 1); | |
| 30 | /* Look up the bucket to get the entries in that bucket. */ | |
| 31 | bucket = &table->buckets[hash]; | |
| 32 | /* Get the first entry in the bucket. */ | |
| 33 | Entry = bucket->next; | |
| 34 | ||
| 35 | /* If (Entry != bucket), the bucket is empty so make */ | |
| 36 | /* the new entry the first entry in the bucket. */ | |
| 37 | /* if (Entry == bucket), the we have to search the */ | |
| 38 | /* bucket. */ | |
| 39 | if (Entry != bucket) { | |
| 40 | /* The bucket isn't empty, begin searching. */ | |
| 41 | /* If we leave the for loop then we have either passed */ | |
| 42 | /* where the entry should be or hit the end of the bucket. */ | |
| 43 | /* In either case we should then insert the new entry */ | |
| 44 | /* before the current value of "Entry". */ | |
| 45 | for (; Entry != bucket; Entry = Entry->next) { | |
| 46 | if (Entry->x_id == x_id) { | |
| 47 | /* Entry has the same XId... */ | |
| 48 | if (Entry->display == dpy) { | |
| 49 | /* Entry has the same Display... */ | |
| 50 | /* Therefore there is already an */ | |
| 51 | /* entry with this XId and Display, */ | |
| 52 | /* reset its data value and return. */ | |
| 53 | Entry->data = data; | |
| 54 | return; | |
| 55 | } | |
| 56 | /* We found an association with the right */ | |
| 57 | /* id but the wrong display! */ | |
| 58 | continue; | |
| 59 | } | |
| 60 | /* If the current entry's XId is greater than the */ | |
| 61 | /* XId of the entry to be inserted then we have */ | |
| 62 | /* passed the location where the new XId should */ | |
| 63 | /* be inserted. */ | |
| 64 | if (Entry->x_id > x_id) break; | |
| 65 | } | |
| 66 | } | |
| 67 | ||
| 68 | /* If we are here then the new entry should be inserted just */ | |
| 69 | /* before the current value of "Entry". */ | |
| 70 | /* Create a new XAssoc and load it with new provided data. */ | |
| bdf41b96 | 71 | new_entry = (XAssoc *) malloc(sizeof(XAssoc)); |
| e745ede7 DL |
72 | new_entry->display = dpy; |
| 73 | new_entry->x_id = x_id; | |
| 74 | new_entry->data = data; | |
| 75 | ||
| 76 | /* Insert the new entry. */ | |
| 77 | emacs_insque((struct qelem *)new_entry, (struct qelem *)Entry->prev); | |
| 78 | } |