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 DL |
5 | |
| 6 | #include <config.h> | |
| 7 | #include <X11/Xlib.h> | |
| 8 | #include <X11/Xresource.h> | |
| 9 | #include "X10.h" | |
| 10 | #include <errno.h> | |
| 11 | ||
| 12 | #ifndef NULL | |
| 13 | #define NULL 0 | |
| 14 | #endif | |
| 15 | ||
| e745ede7 DL |
16 | struct qelem { |
| 17 | struct qelem *q_forw; | |
| 18 | struct qelem *q_back; | |
| 19 | char q_data[1]; | |
| 20 | }; | |
| b782e2d7 DN |
21 | void emacs_insque (struct qelem *elem, struct qelem *prev); |
| 22 | ||
| e745ede7 DL |
23 | /* |
| 24 | * XMakeAssoc - Insert data into an XAssocTable keyed on an XId. | |
| 25 | * Data is inserted into the table only once. Redundant inserts are | |
| 26 | * meaningless (but cause no problems). The queue in each association | |
| 27 | * bucket is sorted (lowest XId to highest XId). | |
| 28 | */ | |
| 76320384 | 29 | void |
| b782e2d7 | 30 | XMakeAssoc(register Display *dpy, register XAssocTable *table, register XID x_id, register caddr_t data) |
| e745ede7 DL |
31 | { |
| 32 | int hash; | |
| 33 | register XAssoc *bucket; | |
| 34 | register XAssoc *Entry; | |
| 35 | register XAssoc *new_entry; | |
| 177c0ea7 | 36 | |
| e745ede7 DL |
37 | /* Hash the XId to get the bucket number. */ |
| 38 | hash = x_id & (table->size - 1); | |
| 39 | /* Look up the bucket to get the entries in that bucket. */ | |
| 40 | bucket = &table->buckets[hash]; | |
| 41 | /* Get the first entry in the bucket. */ | |
| 42 | Entry = bucket->next; | |
| 43 | ||
| 44 | /* If (Entry != bucket), the bucket is empty so make */ | |
| 45 | /* the new entry the first entry in the bucket. */ | |
| 46 | /* if (Entry == bucket), the we have to search the */ | |
| 47 | /* bucket. */ | |
| 48 | if (Entry != bucket) { | |
| 49 | /* The bucket isn't empty, begin searching. */ | |
| 50 | /* If we leave the for loop then we have either passed */ | |
| 51 | /* where the entry should be or hit the end of the bucket. */ | |
| 52 | /* In either case we should then insert the new entry */ | |
| 53 | /* before the current value of "Entry". */ | |
| 54 | for (; Entry != bucket; Entry = Entry->next) { | |
| 55 | if (Entry->x_id == x_id) { | |
| 56 | /* Entry has the same XId... */ | |
| 57 | if (Entry->display == dpy) { | |
| 58 | /* Entry has the same Display... */ | |
| 59 | /* Therefore there is already an */ | |
| 60 | /* entry with this XId and Display, */ | |
| 61 | /* reset its data value and return. */ | |
| 62 | Entry->data = data; | |
| 63 | return; | |
| 64 | } | |
| 65 | /* We found an association with the right */ | |
| 66 | /* id but the wrong display! */ | |
| 67 | continue; | |
| 68 | } | |
| 69 | /* If the current entry's XId is greater than the */ | |
| 70 | /* XId of the entry to be inserted then we have */ | |
| 71 | /* passed the location where the new XId should */ | |
| 72 | /* be inserted. */ | |
| 73 | if (Entry->x_id > x_id) break; | |
| 74 | } | |
| 75 | } | |
| 76 | ||
| 77 | /* If we are here then the new entry should be inserted just */ | |
| 78 | /* before the current value of "Entry". */ | |
| 79 | /* Create a new XAssoc and load it with new provided data. */ | |
| bdf41b96 | 80 | new_entry = (XAssoc *) malloc(sizeof(XAssoc)); |
| e745ede7 DL |
81 | new_entry->display = dpy; |
| 82 | new_entry->x_id = x_id; | |
| 83 | new_entry->data = data; | |
| 84 | ||
| 85 | /* Insert the new entry. */ | |
| 86 | emacs_insque((struct qelem *)new_entry, (struct qelem *)Entry->prev); | |
| 87 | } | |
| 88 |