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Diffstat (limited to 'contrib/ffmpeg/libavutil/tree.c')
-rw-r--r-- | contrib/ffmpeg/libavutil/tree.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/contrib/ffmpeg/libavutil/tree.c b/contrib/ffmpeg/libavutil/tree.c deleted file mode 100644 index c929e4819..000000000 --- a/contrib/ffmpeg/libavutil/tree.c +++ /dev/null @@ -1,151 +0,0 @@ -/* - * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "common.h" -#include "log.h" -#include "tree.h" - -typedef struct AVTreeNode{ - struct AVTreeNode *child[2]; - void *elem; - int state; -}AVTreeNode; - -void *av_tree_find(const AVTreeNode *t, void *key, int (*cmp)(void *key, const void *b), void *next[2]){ - if(t){ - unsigned int v= cmp(t->elem, key); - if(v){ - if(next) next[(v>>31)^1]= t->elem; - return av_tree_find(t->child[v>>31], key, cmp, next); - }else{ - return t->elem; - } - } - return NULL; -} - -void *av_tree_insert(AVTreeNode **tp, void *key, int (*cmp)(void *key, const void *b)){ - AVTreeNode *t= *tp; - if(t){ - unsigned int v= cmp(t->elem, key); - if(v){ - int i= v>>31; - AVTreeNode **child= &t->child[i]; - void *ret= av_tree_insert(child, key, cmp); - if(!ret){ - t->state -= ((int)v>>31)|1; - if(!(t->state&1)){ - if(t->state){ - if((*child)->state*2 == t->state){ - *tp= *child; - *child= (*child)->child[i^1]; - (*tp)->child[i^1]= t; - t->state= 0; - }else{ - *tp= (*child)->child[i^1]; - (*child)->child[i^1]= (*tp)->child[i]; - (*tp)->child[i]= *child; - *child= (*tp)->child[i^1]; - (*tp)->child[i^1]= t; - - i= (*tp)->state > 0; - (*tp)->child[i ]->state= 0; - (*tp)->child[i^1]->state= -(*tp)->state; - } - (*tp)->state=0; - } - return key; - } - } - return ret; - }else{ - return t->elem; - } - }else{ - *tp= av_mallocz(sizeof(AVTreeNode)); - (*tp)->elem= key; - return NULL; - } -} - -void av_tree_destroy(AVTreeNode *t){ - av_tree_destroy(t->child[0]); - av_tree_destroy(t->child[1]); - av_free(t); -} - -#if 0 -void av_tree_enumerate(AVTreeNode *t, void *opaque, int (*f)(void *opaque, void *elem)){ - int v= f(opaque, t->elem); - if(v>=0) av_tree_enumerate(t->child[0], opaque, f); - if(v<=0) av_tree_enumerate(t->child[1], opaque, f); -} -#endif - -#ifdef TEST - -static int check(AVTreeNode *t){ - if(t){ - int left= check(t->child[0]); - int right= check(t->child[1]); - - if(left>999 || right>999) - return 1000; - if(right - left != t->state) - return 1000; - if(t->state>1 || t->state<-1) - return 1000; - return FFMAX(left, right)+1; - } - return 0; -} - -static void print(AVTreeNode *t, int depth){ - int i; - for(i=0; i<depth*4; i++) av_log(NULL, AV_LOG_ERROR, " "); - if(t){ - av_log(NULL, AV_LOG_ERROR, "Node %p %2d %4d\n", t, t->state, t->elem); - print(t->child[0], depth+1); - print(t->child[1], depth+1); - }else - av_log(NULL, AV_LOG_ERROR, "NULL\n"); -} - -int cmp(const void *a, const void *b){ - return a-b; -} - -int main(){ - int i,j,k; - AVTreeNode *root= NULL; - - for(i=0; i<10000; i++){ - int j= (random()%863294); - if(check(root) > 999){ - av_log(NULL, AV_LOG_ERROR, "FATAL error %d\n", i); - print(root, 0); - return -1; - } - av_log(NULL, AV_LOG_ERROR, "inserting %4d\n", j); - av_tree_insert(&root, (void*)(j+1), cmp); - } - return 0; -} -#endif |