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qpkg/jrb.[ch]: remove trailing spaces
This commit is contained in:
Werner Almesberger
parent
a463773c12
commit
7e641d2655
112
qpkg/jrb.c
112
qpkg/jrb.c
@ -38,19 +38,19 @@ Fax: 865-974-4404
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/* Original code by Jim Plank (plank@cs.utk.edu) */
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/* modified for THINK C 6.0 for Macintosh by Chris Bartley */
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include "jrb.h"
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static void mk_new_int(JRB l, JRB r, JRB p, int il);
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static JRB lprev(JRB n);
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static JRB rprev(JRB n);
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static void recolor(JRB n);
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static void single_rotate(JRB y, int l);
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#define isred(n) (n->red)
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#define isblack(n) (!isred(n))
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#define isleft(n) (n->left)
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@ -73,21 +73,21 @@ static void single_rotate(JRB y, int l);
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#define setext(n) n->internal = 0
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#define setnormal(n) n->roothead = 0
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#define sibling(n) (isleft(n) ? n->parent->blink : n->parent->flink)
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static void insert(JRB item, JRB list) /* Inserts to the end of a list */
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{
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JRB last_node;
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last_node = list->blink;
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list->blink = item;
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last_node->flink = item;
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item->blink = last_node;
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item->flink = list;
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}
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static void delete_item(JRB item) /* Deletes an arbitrary iterm */
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{
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item->flink->blink = item->blink;
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@ -108,11 +108,11 @@ static JRB mk_new_ext(void *key, void *val)
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return new;
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}
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static void mk_new_int(JRB l, JRB r, JRB p, int il)
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{
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JRB newnode;
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newnode = (JRB) malloc(sizeof(struct jrb_node));
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setint(newnode);
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setred(newnode);
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@ -137,9 +137,9 @@ static void mk_new_int(JRB l, JRB r, JRB p, int il)
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p->blink = newnode;
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}
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recolor(newnode);
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}
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}
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JRB lprev(JRB n)
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{
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if (ishead(n))
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@ -152,7 +152,7 @@ JRB lprev(JRB n)
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return n->parent;
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}
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JRB rprev(JRB n)
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{
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if (ishead(n))
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@ -164,12 +164,12 @@ JRB rprev(JRB n)
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}
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return n->parent;
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}
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JRB make_jrb(void)
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{
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JRB head;
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head = (JRB) malloc(sizeof(struct jrb_node));
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head->flink = head;
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head->blink = head;
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@ -178,13 +178,13 @@ JRB make_jrb(void)
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sethead(head);
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return head;
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}
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JRB jrb_find_gte(JRB n, const void *key,
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int (*fxn)(const void *, const void *), int *fnd)
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{
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int cmp;
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*fnd = 0;
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if (!ishead(n)) {
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fprintf(stderr, "jrb_find_gte_str called on non-head %p\n", n);
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@ -195,10 +195,10 @@ JRB jrb_find_gte(JRB n, const void *key,
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cmp = (*fxn)(key, n->blink->key);
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if (cmp == 0) {
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*fnd = 1;
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return n->blink;
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return n->blink;
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}
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if (cmp > 0)
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return n;
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return n;
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else
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n = n->parent;
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while (1) {
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@ -216,7 +216,7 @@ JRB jrb_find_gte(JRB n, const void *key,
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}
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}
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JRB jrb_find(JRB n, const void *key, int (*fxn)(const void *, const void *))
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{
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int fnd;
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@ -229,11 +229,11 @@ JRB jrb_find(JRB n, const void *key, int (*fxn)(const void *, const void *))
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return NULL;
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}
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static JRB jrb_insert_b(JRB n, void *key, void *val)
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{
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JRB newleft, newright, newnode, p;
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if (ishead(n)) {
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if (n->parent == n) { /* Tree is empty */
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newnode = mk_new_ext(key, val);
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@ -262,32 +262,32 @@ static JRB jrb_insert_b(JRB n, void *key, void *val)
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p = lprev(newleft);
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if (!ishead(p))
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setrext(p, newleft);
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return newleft;
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return newleft;
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}
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}
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static void recolor(JRB n)
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{
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{
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JRB p, gp, s;
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int done = 0;
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while (!done) {
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if (isroot(n)) {
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setblack(n);
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return;
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}
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p = n->parent;
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if (isblack(p))
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return;
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if (isroot(p)) {
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setblack(p);
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return;
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}
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gp = p->parent;
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s = sibling(p);
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if (isred(s)) {
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@ -300,7 +300,7 @@ static void recolor(JRB n)
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}
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}
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/* p's sibling is black, p is red, gp is black */
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if ((isleft(n) == 0) == (isleft(p) == 0)) {
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single_rotate(gp, isleft(n));
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setblack(p);
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@ -313,33 +313,33 @@ static void recolor(JRB n)
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}
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}
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static void single_rotate(JRB y, int l)
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{
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int rl = 0 /* for gcc */, ir;
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JRB x, yp;
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ir = isroot(y);
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yp = y->parent;
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if (!ir)
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rl = isleft(y);
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if (l) {
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x = y->flink;
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y->flink = x->blink;
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setleft(y->flink);
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y->flink->parent = y;
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x->blink = y;
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setright(y);
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setright(y);
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} else {
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x = y->blink;
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y->blink = x->flink;
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setright(y->blink);
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y->blink->parent = y;
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x->flink = y;
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setleft(y);
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setleft(y);
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}
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x->parent = yp;
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y->parent = x;
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if (ir) {
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@ -362,7 +362,7 @@ void jrb_delete_node(JRB n)
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{
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JRB s, p, gp, x, z;
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char ir, il;
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if (isint(n)) {
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fprintf(stderr, "Cannot delete an internal node: %p\n", n);
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exit(1);
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@ -378,7 +378,7 @@ void jrb_delete_node(JRB n)
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p->parent = p;
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free(n);
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return;
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}
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}
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s = sibling(n); /* The only node after deletion */
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if (isroot(p)) {
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s->parent = p->parent;
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@ -400,9 +400,9 @@ void jrb_delete_node(JRB n)
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ir = isred(p);
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free(p);
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free(n);
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if (isext(s)) { /* Update proper rext and lext values */
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p = lprev(s);
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p = lprev(s);
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if (!ishead(p))
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setrext(p, s);
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p = rprev(s);
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@ -421,16 +421,16 @@ void jrb_delete_node(JRB n)
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setblack(s);
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return;
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}
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if (ir)
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return;
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/* Recolor */
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n = s;
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p = n->parent;
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s = sibling(n);
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while (isblack(p) && isblack(s) && isint(s) &&
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while (isblack(p) && isblack(s) && isint(s) &&
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isblack(s->flink) && isblack(s->blink)) {
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setred(s);
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n = p;
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@ -439,23 +439,23 @@ void jrb_delete_node(JRB n)
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p = n->parent;
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s = sibling(n);
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}
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if (isblack(p) && isred(s)) { /* Rotation 2.3b */
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single_rotate(p, isright(n));
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setred(p);
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setblack(s);
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s = sibling(n);
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}
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if (isext(s)) {
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fprintf(stderr, "DELETION ERROR: sibling not internal\n");
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exit(1);
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}
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il = isleft(n);
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x = il ? s->flink : s->blink;
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z = sibling(x);
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if (isred(z)) { /* Rotation 2.3f */
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single_rotate(p, !il);
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setblack(z);
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@ -489,7 +489,7 @@ void jrb_delete_node(JRB n)
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setblack(x);
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}
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int jrb_nblack(JRB n)
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{
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int nb;
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@ -507,7 +507,7 @@ int jrb_nblack(JRB n)
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return nb;
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}
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int jrb_plength(JRB n)
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{
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int pl;
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@ -525,7 +525,7 @@ int jrb_plength(JRB n)
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return pl;
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}
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void jrb_free_tree(JRB n)
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{
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if (!ishead(n)) {
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@ -533,23 +533,23 @@ void jrb_free_tree(JRB n)
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"ERROR: Rb_free_tree called on a non-head node\n");
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exit(1);
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}
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while (jrb_first(n) != jrb_nil(n))
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jrb_delete_node(jrb_first(n));
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free(n);
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}
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void *jrb_val(JRB n)
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{
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return n->val;
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}
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JRB jrb_insert(JRB tree, void *key, void *val,
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int (*func)(const void *a, const void *b))
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{
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{
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int fnd;
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return jrb_insert_b(jrb_find_gte(tree, key, func, &fnd), key, val);
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16
qpkg/jrb.h
16
qpkg/jrb.h
@ -78,15 +78,15 @@ JRB jrb_find(JRB root, const void *key,
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k or whose value is the smallest value greater than k. Sets found to
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1 if the key was found, and 0 otherwise. */
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JRB jrb_find_gte(JRB root, const void *key,
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JRB jrb_find_gte(JRB root, const void *key,
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int (*func)(const void *a, const void *b), int *found);
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/* Creates a node with key key and val val and inserts it into the
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tree before/after node nd. Does not check to ensure that you are
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/* Creates a node with key key and val val and inserts it into the
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tree before/after node nd. Does not check to ensure that you are
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keeping the correct order */
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void jrb_delete_node(JRB node); /* Deletes and frees a node (but
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void jrb_delete_node(JRB node); /* Deletes and frees a node (but
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not the key or val) */
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void jrb_free_tree(JRB root); /* Deletes and frees an entire tree */
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@ -97,7 +97,7 @@ int jrb_nblack(JRB n); /* returns # of black nodes in path from
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n to the root */
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int jrb_plength(JRB n); /* returns the # of nodes in path from
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n to the root */
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#define jrb_first(n) ((n)->flink)
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#define jrb_last(n) ((n)->blink)
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#define jrb_next(n) ((n)->flink)
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@ -106,11 +106,11 @@ int jrb_plength(JRB n); /* returns the # of nodes in path from
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#ifndef jrb_nil
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#define jrb_nil(t) (t)
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#endif
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#define jrb_traverse(ptr, lst) \
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for (ptr = jrb_first(lst); ptr != jrb_nil(lst); ptr = jrb_next(ptr))
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#define jrb_rtraverse(ptr, lst) \
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for (ptr = jrb_last(lst); ptr != jrb_nil(lst); ptr = jrb_prev(ptr))
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#endif
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