add cached hz font feature.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@163 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong
parent
0d9a579a81
commit
d5f1ad1b4a
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#include <rtgui/dc.h>
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#include <rtgui/font.h>
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static void rtgui_hz_bitmap_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const rt_uint8_t* text, rt_ubase_t len, struct rtgui_rect* rect);
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static void rtgui_hz_bitmap_font_get_metrics(struct rtgui_font* font, const rt_uint8_t* text, rtgui_rect_t* rect);
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struct rtgui_font_engine hz_bmp_font_engine =
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{
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RT_NULL,
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RT_NULL,
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rtgui_hz_bitmap_font_draw_text,
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rtgui_hz_bitmap_font_get_metrics
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};
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static void rtgui_hz_bitmap_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const rt_uint8_t* text, rt_ubase_t len, struct rtgui_rect* rect)
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{
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rt_base_t h;
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rt_uint8_t* str;
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struct rtgui_font_bitmap* bmp_font = (struct rtgui_font_bitmap*)(font->data);
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RT_ASSERT(bmp_font != RT_NULL);
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/* drawing height */
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h = (bmp_font->height + rect->y1 > rect->y2)? rect->y2 - rect->y1 : bmp_font->height;
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str = (rt_uint8_t*)text;
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while (len > 0 && rect->x1 < rect->x2)
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{
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const rt_uint8_t* font_ptr;
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rt_ubase_t sect, index;
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register rt_base_t i, j, k;
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/* calculate section and index */
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sect = *str - 0xA0;
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index = *(str+1) - 0xA0;
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/* get font pixel data */
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font_ptr = bmp_font->bmp + ( 94*(sect-1) + (index-1) )*(bmp_font->width + bmp_font->height);
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/* draw word */
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for (i=0; i < h; i ++)
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{
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for (j=0; j < 2; j++)
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for (k=0; k < 8; k++)
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{
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if ( ((font_ptr[i*2 + j] >> (7-k)) & 0x01) != 0 &&
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(rect->x1 + 8 * j + k < rect->x2))
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{
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rtgui_dc_draw_point(dc, rect->x1 + 8*j + k, rect->y1 + i);
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}
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}
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}
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/* move x to next character */
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rect->x1 += bmp_font->width;
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str += 2;
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len -= 2;
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}
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}
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static void rtgui_hz_bitmap_font_get_metrics(struct rtgui_font* font, const rt_uint8_t* text, rtgui_rect_t* rect)
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{
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struct rtgui_font_bitmap* bmp_font = (struct rtgui_font_bitmap*)(font->data);
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RT_ASSERT(bmp_font != RT_NULL);
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/* set metrics rect */
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rect->x1 = rect->y1 = 0;
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rect->x2 = (rt_int16_t)(bmp_font->width * rt_strlen((const char*)text));
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rect->y2 = bmp_font->height;
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}
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@ -0,0 +1,165 @@
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/*
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* Cached HZ font engine
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*/
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#include <rtgui/dc.h>
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#include <rtgui/font.h>
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#include <rtgui/tree.h>
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#include <rtgui/rtgui_system.h>
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#include <dfs_posix.h>
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#define HZ_DATA_SIZE (2 * 16)
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#define HZ_CACHE_MAX 64
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SPLAY_HEAD(cache_tree, hz_cache);
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struct hz_cache
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{
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SPLAY_ENTRY(hz_cache) hz_node;
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rt_uint16_t hz_id;
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};
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struct rtgui_hz_file_font
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{
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struct cache_tree cache_root;
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rt_uint16_t cache_size;
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/* font size */
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rt_uint16_t font_size;
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/* file descriptor */
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int fd;
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/* font file name */
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const char* font_fn;
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};
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static int _font_cache_compare(struct hz_cache* node1, struct hz_cache* node2);
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static void rtgui_hz_file_font_load(struct rtgui_font* font);
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static void rtgui_hz_file_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const rt_uint8_t* text, rt_ubase_t len, struct rtgui_rect* rect);
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static void rtgui_hz_file_font_get_metrics(struct rtgui_font* font, const rt_uint8_t* text, rtgui_rect_t* rect);
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struct rtgui_font_engine rtgui_hz_file_font_engine =
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{
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RT_NULL,
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rtgui_hz_file_font_load,
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rtgui_hz_file_font_draw_text,
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rtgui_hz_file_font_get_metrics
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};
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SPLAY_PROTOTYPE(cache_tree, hz_cache, hz_node, _font_cache_compare);
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SPLAY_GENERATE (cache_tree, hz_cache, hz_node, _font_cache_compare);
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static int _font_cache_compare(struct hz_cache* cache_1, struct hz_cache* cache_2)
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{
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if (cache_1->hz_id > cache_2->hz_id) return 1;
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if (cache_1->hz_id < cache_2->hz_id) return -1;
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return 0;
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}
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static rt_uint8_t* _font_cache_get(struct rtgui_hz_file_font* font, rt_uint16_t hz_id)
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{
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rt_uint32_t seek;
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struct hz_cache *cache, search;
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search.hz_id = hz_id;
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cache = SPLAY_FIND(cache_tree, &(font->cache_root), &search);
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if (cache != RT_NULL)
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{
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/* find it */
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return (rt_uint8_t*)(cache + 1);
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}
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/* can not find it, load to cache */
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cache = (struct hz_cache*) rtgui_malloc(sizeof(struct hz_cache) + HZ_DATA_SIZE);
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if (cache == RT_NULL) return RT_NULL; /* no memory yet */
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cache->hz_id = hz_id;
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seek = 94 * ((hz_id & 0xff - 0xA0) - 1) + ((hz_id >> 8) - 0xA0);
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seek = seek * HZ_DATA_SIZE;
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/* read hz font data */
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if ((lseek(font->fd, seek, SEEK_SET) < 0) ||
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read(font->fd, (char*)(cache + 1), HZ_DATA_SIZE) !=
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HZ_DATA_SIZE)
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{
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rtgui_free(cache);
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return RT_NULL;
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}
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/* insert to cache */
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SPLAY_INSERT(cache_tree, &(font->cache_root), cache);
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if (font->cache_size > HZ_CACHE_MAX)
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{
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/* remove a cache */
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struct hz_cache* left;
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left = SPLAY_LEFT(font->cache_root.sph_root, hz_node);
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while (SPLAY_LEFT(left, hz_node) != RT_NULL) left = SPLAY_LEFT(left, hz_node);
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/* remove the left node */
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SPLAY_REMOVE(cache_tree, &(font->cache_root), left);
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}
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return (rt_uint8_t*)(cache + 1);
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}
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static void rtgui_hz_file_font_load(struct rtgui_font* font)
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{
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struct rtgui_hz_file_font* hz_file_font = (struct rtgui_hz_file_font*)font;
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RT_ASSERT(hz_file_font != RT_NULL);
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hz_file_font->fd = open(hz_file_font->font_fn, O_RDONLY, 0);
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}
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static void rtgui_hz_file_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const rt_uint8_t* text, rt_ubase_t len, struct rtgui_rect* rect)
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{
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rt_base_t h;
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rt_uint8_t* str;
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struct rtgui_hz_file_font* hz_file_font = (struct rtgui_hz_file_font*)font;
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RT_ASSERT(hz_file_font != RT_NULL);
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/* drawing height */
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h = (hz_file_font->font_size + rect->y1 > rect->y2)?
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rect->y2 - rect->y1 : hz_file_font->font_size;
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str = (rt_uint8_t*)text;
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while (len > 0 && rect->x1 < rect->x2)
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{
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const rt_uint8_t* font_ptr;
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register rt_base_t i, j, k;
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/* get font pixel data */
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font_ptr = _font_cache_get(hz_file_font, *(rt_uint16_t*)str);
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/* draw word */
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for (i=0; i < h; i ++)
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{
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for (j=0; j < 2; j++)
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for (k=0; k < 8; k++)
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{
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if ( ((font_ptr[i*2 + j] >> (7-k)) & 0x01) != 0 &&
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(rect->x1 + 8 * j + k < rect->x2))
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{
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rtgui_dc_draw_point(dc, rect->x1 + 8*j + k, rect->y1 + i);
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}
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}
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}
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/* move x to next character */
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rect->x1 += hz_file_font->font_size;
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str += 2;
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len -= 2;
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}
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}
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static void rtgui_hz_file_font_get_metrics(struct rtgui_font* font, const rt_uint8_t* text, rtgui_rect_t* rect)
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{
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struct rtgui_hz_file_font* hz_file_font = (struct rtgui_hz_file_font*)font;
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RT_ASSERT(hz_file_font != RT_NULL);
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/* set metrics rect */
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rect->x1 = rect->y1 = 0;
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rect->x2 = (rt_int16_t)(hz_file_font->font_size/2 * rt_strlen((const char*)text));
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rect->y2 = hz_file_font->font_size;
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}
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File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,748 @@
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/* $NetBSD: tree.h,v 1.8 2004/03/28 19:38:30 provos Exp $ */
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/* $OpenBSD: tree.h,v 1.7 2002/10/17 21:51:54 art Exp $ */
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/* $FreeBSD$ */
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/*-
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* Copyright 2002 Niels Provos <provos@citi.umich.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_TREE_H_
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#define _SYS_TREE_H_
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#ifndef NULL
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#define NULL RT_NULL
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#endif
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// #include <sys/cdefs.h>
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/*
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* This file defines data structures for different types of trees:
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* splay trees and red-black trees.
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*
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* A splay tree is a self-organizing data structure. Every operation
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* on the tree causes a splay to happen. The splay moves the requested
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* node to the root of the tree and partly rebalances it.
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*
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* This has the benefit that request locality causes faster lookups as
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* the requested nodes move to the top of the tree. On the other hand,
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* every lookup causes memory writes.
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*
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* The Balance Theorem bounds the total access time for m operations
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* and n inserts on an initially empty tree as O((m + n)lg n). The
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* amortized cost for a sequence of m accesses to a splay tree is O(lg n);
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*
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* A red-black tree is a binary search tree with the node color as an
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* extra attribute. It fulfills a set of conditions:
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* - every search path from the root to a leaf consists of the
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* same number of black nodes,
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* - each red node (except for the root) has a black parent,
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* - each leaf node is black.
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*
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* Every operation on a red-black tree is bounded as O(lg n).
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* The maximum height of a red-black tree is 2lg (n+1).
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*/
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#define SPLAY_HEAD(name, type) \
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struct name { \
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struct type *sph_root; /* root of the tree */ \
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}
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#define SPLAY_INITIALIZER(root) \
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{ NULL }
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#define SPLAY_INIT(root) do { \
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(root)->sph_root = NULL; \
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} while (/*CONSTCOND*/ 0)
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#define SPLAY_ENTRY(type) \
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struct { \
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struct type *spe_left; /* left element */ \
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struct type *spe_right; /* right element */ \
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}
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#define SPLAY_LEFT(elm, field) (elm)->field.spe_left
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#define SPLAY_RIGHT(elm, field) (elm)->field.spe_right
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#define SPLAY_ROOT(head) (head)->sph_root
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#define SPLAY_EMPTY(head) (SPLAY_ROOT(head) == NULL)
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/* SPLAY_ROTATE_{LEFT,RIGHT} expect that tmp hold SPLAY_{RIGHT,LEFT} */
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#define SPLAY_ROTATE_RIGHT(head, tmp, field) do { \
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SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(tmp, field); \
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SPLAY_RIGHT(tmp, field) = (head)->sph_root; \
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(head)->sph_root = tmp; \
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} while (/*CONSTCOND*/ 0)
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#define SPLAY_ROTATE_LEFT(head, tmp, field) do { \
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SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(tmp, field); \
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SPLAY_LEFT(tmp, field) = (head)->sph_root; \
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(head)->sph_root = tmp; \
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} while (/*CONSTCOND*/ 0)
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#define SPLAY_LINKLEFT(head, tmp, field) do { \
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SPLAY_LEFT(tmp, field) = (head)->sph_root; \
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tmp = (head)->sph_root; \
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(head)->sph_root = SPLAY_LEFT((head)->sph_root, field); \
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} while (/*CONSTCOND*/ 0)
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#define SPLAY_LINKRIGHT(head, tmp, field) do { \
|
||||||
|
SPLAY_RIGHT(tmp, field) = (head)->sph_root; \
|
||||||
|
tmp = (head)->sph_root; \
|
||||||
|
(head)->sph_root = SPLAY_RIGHT((head)->sph_root, field); \
|
||||||
|
} while (/*CONSTCOND*/ 0)
|
||||||
|
|
||||||
|
#define SPLAY_ASSEMBLE(head, node, left, right, field) do { \
|
||||||
|
SPLAY_RIGHT(left, field) = SPLAY_LEFT((head)->sph_root, field); \
|
||||||
|
SPLAY_LEFT(right, field) = SPLAY_RIGHT((head)->sph_root, field);\
|
||||||
|
SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(node, field); \
|
||||||
|
SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(node, field); \
|
||||||
|
} while (/*CONSTCOND*/ 0)
|
||||||
|
|
||||||
|
/* Generates prototypes and inline functions */
|
||||||
|
|
||||||
|
#define SPLAY_PROTOTYPE(name, type, field, cmp) \
|
||||||
|
void name##_SPLAY(struct name *, struct type *); \
|
||||||
|
void name##_SPLAY_MINMAX(struct name *, int); \
|
||||||
|
struct type *name##_SPLAY_INSERT(struct name *, struct type *); \
|
||||||
|
struct type *name##_SPLAY_REMOVE(struct name *, struct type *); \
|
||||||
|
\
|
||||||
|
/* Finds the node with the same key as elm */ \
|
||||||
|
static __inline struct type * \
|
||||||
|
name##_SPLAY_FIND(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
if (SPLAY_EMPTY(head)) \
|
||||||
|
return(NULL); \
|
||||||
|
name##_SPLAY(head, elm); \
|
||||||
|
if ((cmp)(elm, (head)->sph_root) == 0) \
|
||||||
|
return (head->sph_root); \
|
||||||
|
return (NULL); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
static __inline struct type * \
|
||||||
|
name##_SPLAY_NEXT(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
name##_SPLAY(head, elm); \
|
||||||
|
if (SPLAY_RIGHT(elm, field) != NULL) { \
|
||||||
|
elm = SPLAY_RIGHT(elm, field); \
|
||||||
|
while (SPLAY_LEFT(elm, field) != NULL) { \
|
||||||
|
elm = SPLAY_LEFT(elm, field); \
|
||||||
|
} \
|
||||||
|
} else \
|
||||||
|
elm = NULL; \
|
||||||
|
return (elm); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
static __inline struct type * \
|
||||||
|
name##_SPLAY_MIN_MAX(struct name *head, int val) \
|
||||||
|
{ \
|
||||||
|
name##_SPLAY_MINMAX(head, val); \
|
||||||
|
return (SPLAY_ROOT(head)); \
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Main splay operation.
|
||||||
|
* Moves node close to the key of elm to top
|
||||||
|
*/
|
||||||
|
#define SPLAY_GENERATE(name, type, field, cmp) \
|
||||||
|
struct type * \
|
||||||
|
name##_SPLAY_INSERT(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
if (SPLAY_EMPTY(head)) { \
|
||||||
|
SPLAY_LEFT(elm, field) = SPLAY_RIGHT(elm, field) = NULL; \
|
||||||
|
} else { \
|
||||||
|
int __comp; \
|
||||||
|
name##_SPLAY(head, elm); \
|
||||||
|
__comp = (cmp)(elm, (head)->sph_root); \
|
||||||
|
if(__comp < 0) { \
|
||||||
|
SPLAY_LEFT(elm, field) = SPLAY_LEFT((head)->sph_root, field);\
|
||||||
|
SPLAY_RIGHT(elm, field) = (head)->sph_root; \
|
||||||
|
SPLAY_LEFT((head)->sph_root, field) = NULL; \
|
||||||
|
} else if (__comp > 0) { \
|
||||||
|
SPLAY_RIGHT(elm, field) = SPLAY_RIGHT((head)->sph_root, field);\
|
||||||
|
SPLAY_LEFT(elm, field) = (head)->sph_root; \
|
||||||
|
SPLAY_RIGHT((head)->sph_root, field) = NULL; \
|
||||||
|
} else \
|
||||||
|
return ((head)->sph_root); \
|
||||||
|
} \
|
||||||
|
(head)->sph_root = (elm); \
|
||||||
|
return (NULL); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
struct type * \
|
||||||
|
name##_SPLAY_REMOVE(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
struct type *__tmp; \
|
||||||
|
if (SPLAY_EMPTY(head)) \
|
||||||
|
return (NULL); \
|
||||||
|
name##_SPLAY(head, elm); \
|
||||||
|
if ((cmp)(elm, (head)->sph_root) == 0) { \
|
||||||
|
if (SPLAY_LEFT((head)->sph_root, field) == NULL) { \
|
||||||
|
(head)->sph_root = SPLAY_RIGHT((head)->sph_root, field);\
|
||||||
|
} else { \
|
||||||
|
__tmp = SPLAY_RIGHT((head)->sph_root, field); \
|
||||||
|
(head)->sph_root = SPLAY_LEFT((head)->sph_root, field);\
|
||||||
|
name##_SPLAY(head, elm); \
|
||||||
|
SPLAY_RIGHT((head)->sph_root, field) = __tmp; \
|
||||||
|
} \
|
||||||
|
return (elm); \
|
||||||
|
} \
|
||||||
|
return (NULL); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
void \
|
||||||
|
name##_SPLAY(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
struct type __node, *__left, *__right, *__tmp; \
|
||||||
|
int __comp; \
|
||||||
|
\
|
||||||
|
SPLAY_LEFT(&__node, field) = SPLAY_RIGHT(&__node, field) = NULL;\
|
||||||
|
__left = __right = &__node; \
|
||||||
|
\
|
||||||
|
while ((__comp = (cmp)(elm, (head)->sph_root)) != 0) { \
|
||||||
|
if (__comp < 0) { \
|
||||||
|
__tmp = SPLAY_LEFT((head)->sph_root, field); \
|
||||||
|
if (__tmp == NULL) \
|
||||||
|
break; \
|
||||||
|
if ((cmp)(elm, __tmp) < 0){ \
|
||||||
|
SPLAY_ROTATE_RIGHT(head, __tmp, field); \
|
||||||
|
if (SPLAY_LEFT((head)->sph_root, field) == NULL)\
|
||||||
|
break; \
|
||||||
|
} \
|
||||||
|
SPLAY_LINKLEFT(head, __right, field); \
|
||||||
|
} else if (__comp > 0) { \
|
||||||
|
__tmp = SPLAY_RIGHT((head)->sph_root, field); \
|
||||||
|
if (__tmp == NULL) \
|
||||||
|
break; \
|
||||||
|
if ((cmp)(elm, __tmp) > 0){ \
|
||||||
|
SPLAY_ROTATE_LEFT(head, __tmp, field); \
|
||||||
|
if (SPLAY_RIGHT((head)->sph_root, field) == NULL)\
|
||||||
|
break; \
|
||||||
|
} \
|
||||||
|
SPLAY_LINKRIGHT(head, __left, field); \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
SPLAY_ASSEMBLE(head, &__node, __left, __right, field); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
/* Splay with either the minimum or the maximum element \
|
||||||
|
* Used to find minimum or maximum element in tree. \
|
||||||
|
*/ \
|
||||||
|
void name##_SPLAY_MINMAX(struct name *head, int __comp) \
|
||||||
|
{ \
|
||||||
|
struct type __node, *__left, *__right, *__tmp; \
|
||||||
|
\
|
||||||
|
SPLAY_LEFT(&__node, field) = SPLAY_RIGHT(&__node, field) = NULL;\
|
||||||
|
__left = __right = &__node; \
|
||||||
|
\
|
||||||
|
while (1) { \
|
||||||
|
if (__comp < 0) { \
|
||||||
|
__tmp = SPLAY_LEFT((head)->sph_root, field); \
|
||||||
|
if (__tmp == NULL) \
|
||||||
|
break; \
|
||||||
|
if (__comp < 0){ \
|
||||||
|
SPLAY_ROTATE_RIGHT(head, __tmp, field); \
|
||||||
|
if (SPLAY_LEFT((head)->sph_root, field) == NULL)\
|
||||||
|
break; \
|
||||||
|
} \
|
||||||
|
SPLAY_LINKLEFT(head, __right, field); \
|
||||||
|
} else if (__comp > 0) { \
|
||||||
|
__tmp = SPLAY_RIGHT((head)->sph_root, field); \
|
||||||
|
if (__tmp == NULL) \
|
||||||
|
break; \
|
||||||
|
if (__comp > 0) { \
|
||||||
|
SPLAY_ROTATE_LEFT(head, __tmp, field); \
|
||||||
|
if (SPLAY_RIGHT((head)->sph_root, field) == NULL)\
|
||||||
|
break; \
|
||||||
|
} \
|
||||||
|
SPLAY_LINKRIGHT(head, __left, field); \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
SPLAY_ASSEMBLE(head, &__node, __left, __right, field); \
|
||||||
|
}
|
||||||
|
|
||||||
|
#define SPLAY_NEGINF -1
|
||||||
|
#define SPLAY_INF 1
|
||||||
|
|
||||||
|
#define SPLAY_INSERT(name, x, y) name##_SPLAY_INSERT(x, y)
|
||||||
|
#define SPLAY_REMOVE(name, x, y) name##_SPLAY_REMOVE(x, y)
|
||||||
|
#define SPLAY_FIND(name, x, y) name##_SPLAY_FIND(x, y)
|
||||||
|
#define SPLAY_NEXT(name, x, y) name##_SPLAY_NEXT(x, y)
|
||||||
|
#define SPLAY_MIN(name, x) (SPLAY_EMPTY(x) ? NULL \
|
||||||
|
: name##_SPLAY_MIN_MAX(x, SPLAY_NEGINF))
|
||||||
|
#define SPLAY_MAX(name, x) (SPLAY_EMPTY(x) ? NULL \
|
||||||
|
: name##_SPLAY_MIN_MAX(x, SPLAY_INF))
|
||||||
|
|
||||||
|
#define SPLAY_FOREACH(x, name, head) \
|
||||||
|
for ((x) = SPLAY_MIN(name, head); \
|
||||||
|
(x) != NULL; \
|
||||||
|
(x) = SPLAY_NEXT(name, head, x))
|
||||||
|
|
||||||
|
/* Macros that define a red-black tree */
|
||||||
|
#define RB_HEAD(name, type) \
|
||||||
|
struct name { \
|
||||||
|
struct type *rbh_root; /* root of the tree */ \
|
||||||
|
}
|
||||||
|
|
||||||
|
#define RB_INITIALIZER(root) \
|
||||||
|
{ NULL }
|
||||||
|
|
||||||
|
#define RB_INIT(root) do { \
|
||||||
|
(root)->rbh_root = NULL; \
|
||||||
|
} while (/*CONSTCOND*/ 0)
|
||||||
|
|
||||||
|
#define RB_BLACK 0
|
||||||
|
#define RB_RED 1
|
||||||
|
#define RB_ENTRY(type) \
|
||||||
|
struct { \
|
||||||
|
struct type *rbe_left; /* left element */ \
|
||||||
|
struct type *rbe_right; /* right element */ \
|
||||||
|
struct type *rbe_parent; /* parent element */ \
|
||||||
|
int rbe_color; /* node color */ \
|
||||||
|
}
|
||||||
|
|
||||||
|
#define RB_LEFT(elm, field) (elm)->field.rbe_left
|
||||||
|
#define RB_RIGHT(elm, field) (elm)->field.rbe_right
|
||||||
|
#define RB_PARENT(elm, field) (elm)->field.rbe_parent
|
||||||
|
#define RB_COLOR(elm, field) (elm)->field.rbe_color
|
||||||
|
#define RB_ROOT(head) (head)->rbh_root
|
||||||
|
#define RB_EMPTY(head) (RB_ROOT(head) == NULL)
|
||||||
|
|
||||||
|
#define RB_SET(elm, parent, field) do { \
|
||||||
|
RB_PARENT(elm, field) = parent; \
|
||||||
|
RB_LEFT(elm, field) = RB_RIGHT(elm, field) = NULL; \
|
||||||
|
RB_COLOR(elm, field) = RB_RED; \
|
||||||
|
} while (/*CONSTCOND*/ 0)
|
||||||
|
|
||||||
|
#define RB_SET_BLACKRED(black, red, field) do { \
|
||||||
|
RB_COLOR(black, field) = RB_BLACK; \
|
||||||
|
RB_COLOR(red, field) = RB_RED; \
|
||||||
|
} while (/*CONSTCOND*/ 0)
|
||||||
|
|
||||||
|
#ifndef RB_AUGMENT
|
||||||
|
#define RB_AUGMENT(x) do {} while (0)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define RB_ROTATE_LEFT(head, elm, tmp, field) do { \
|
||||||
|
(tmp) = RB_RIGHT(elm, field); \
|
||||||
|
if ((RB_RIGHT(elm, field) = RB_LEFT(tmp, field)) != NULL) { \
|
||||||
|
RB_PARENT(RB_LEFT(tmp, field), field) = (elm); \
|
||||||
|
} \
|
||||||
|
RB_AUGMENT(elm); \
|
||||||
|
if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
|
||||||
|
if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
|
||||||
|
RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
|
||||||
|
else \
|
||||||
|
RB_RIGHT(RB_PARENT(elm, field), field) = (tmp); \
|
||||||
|
} else \
|
||||||
|
(head)->rbh_root = (tmp); \
|
||||||
|
RB_LEFT(tmp, field) = (elm); \
|
||||||
|
RB_PARENT(elm, field) = (tmp); \
|
||||||
|
RB_AUGMENT(tmp); \
|
||||||
|
if ((RB_PARENT(tmp, field))) \
|
||||||
|
RB_AUGMENT(RB_PARENT(tmp, field)); \
|
||||||
|
} while (/*CONSTCOND*/ 0)
|
||||||
|
|
||||||
|
#define RB_ROTATE_RIGHT(head, elm, tmp, field) do { \
|
||||||
|
(tmp) = RB_LEFT(elm, field); \
|
||||||
|
if ((RB_LEFT(elm, field) = RB_RIGHT(tmp, field)) != NULL) { \
|
||||||
|
RB_PARENT(RB_RIGHT(tmp, field), field) = (elm); \
|
||||||
|
} \
|
||||||
|
RB_AUGMENT(elm); \
|
||||||
|
if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
|
||||||
|
if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
|
||||||
|
RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
|
||||||
|
else \
|
||||||
|
RB_RIGHT(RB_PARENT(elm, field), field) = (tmp); \
|
||||||
|
} else \
|
||||||
|
(head)->rbh_root = (tmp); \
|
||||||
|
RB_RIGHT(tmp, field) = (elm); \
|
||||||
|
RB_PARENT(elm, field) = (tmp); \
|
||||||
|
RB_AUGMENT(tmp); \
|
||||||
|
if ((RB_PARENT(tmp, field))) \
|
||||||
|
RB_AUGMENT(RB_PARENT(tmp, field)); \
|
||||||
|
} while (/*CONSTCOND*/ 0)
|
||||||
|
|
||||||
|
/* Generates prototypes and inline functions */
|
||||||
|
#define RB_PROTOTYPE(name, type, field, cmp) \
|
||||||
|
RB_PROTOTYPE_INTERNAL(name, type, field, cmp,)
|
||||||
|
#define RB_PROTOTYPE_STATIC(name, type, field, cmp) \
|
||||||
|
RB_PROTOTYPE_INTERNAL(name, type, field, cmp, __unused static)
|
||||||
|
#define RB_PROTOTYPE_INTERNAL(name, type, field, cmp, attr) \
|
||||||
|
attr void name##_RB_INSERT_COLOR(struct name *, struct type *); \
|
||||||
|
attr void name##_RB_REMOVE_COLOR(struct name *, struct type *, struct type *);\
|
||||||
|
attr struct type *name##_RB_REMOVE(struct name *, struct type *); \
|
||||||
|
attr struct type *name##_RB_INSERT(struct name *, struct type *); \
|
||||||
|
attr struct type *name##_RB_FIND(struct name *, struct type *); \
|
||||||
|
attr struct type *name##_RB_NFIND(struct name *, struct type *); \
|
||||||
|
attr struct type *name##_RB_NEXT(struct type *); \
|
||||||
|
attr struct type *name##_RB_PREV(struct type *); \
|
||||||
|
attr struct type *name##_RB_MINMAX(struct name *, int); \
|
||||||
|
\
|
||||||
|
|
||||||
|
/* Main rb operation.
|
||||||
|
* Moves node close to the key of elm to top
|
||||||
|
*/
|
||||||
|
#define RB_GENERATE(name, type, field, cmp) \
|
||||||
|
RB_GENERATE_INTERNAL(name, type, field, cmp,)
|
||||||
|
#define RB_GENERATE_STATIC(name, type, field, cmp) \
|
||||||
|
RB_GENERATE_INTERNAL(name, type, field, cmp, __unused static)
|
||||||
|
#define RB_GENERATE_INTERNAL(name, type, field, cmp, attr) \
|
||||||
|
attr void \
|
||||||
|
name##_RB_INSERT_COLOR(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
struct type *parent, *gparent, *tmp; \
|
||||||
|
while ((parent = RB_PARENT(elm, field)) != NULL && \
|
||||||
|
RB_COLOR(parent, field) == RB_RED) { \
|
||||||
|
gparent = RB_PARENT(parent, field); \
|
||||||
|
if (parent == RB_LEFT(gparent, field)) { \
|
||||||
|
tmp = RB_RIGHT(gparent, field); \
|
||||||
|
if (tmp && RB_COLOR(tmp, field) == RB_RED) { \
|
||||||
|
RB_COLOR(tmp, field) = RB_BLACK; \
|
||||||
|
RB_SET_BLACKRED(parent, gparent, field);\
|
||||||
|
elm = gparent; \
|
||||||
|
continue; \
|
||||||
|
} \
|
||||||
|
if (RB_RIGHT(parent, field) == elm) { \
|
||||||
|
RB_ROTATE_LEFT(head, parent, tmp, field);\
|
||||||
|
tmp = parent; \
|
||||||
|
parent = elm; \
|
||||||
|
elm = tmp; \
|
||||||
|
} \
|
||||||
|
RB_SET_BLACKRED(parent, gparent, field); \
|
||||||
|
RB_ROTATE_RIGHT(head, gparent, tmp, field); \
|
||||||
|
} else { \
|
||||||
|
tmp = RB_LEFT(gparent, field); \
|
||||||
|
if (tmp && RB_COLOR(tmp, field) == RB_RED) { \
|
||||||
|
RB_COLOR(tmp, field) = RB_BLACK; \
|
||||||
|
RB_SET_BLACKRED(parent, gparent, field);\
|
||||||
|
elm = gparent; \
|
||||||
|
continue; \
|
||||||
|
} \
|
||||||
|
if (RB_LEFT(parent, field) == elm) { \
|
||||||
|
RB_ROTATE_RIGHT(head, parent, tmp, field);\
|
||||||
|
tmp = parent; \
|
||||||
|
parent = elm; \
|
||||||
|
elm = tmp; \
|
||||||
|
} \
|
||||||
|
RB_SET_BLACKRED(parent, gparent, field); \
|
||||||
|
RB_ROTATE_LEFT(head, gparent, tmp, field); \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
RB_COLOR(head->rbh_root, field) = RB_BLACK; \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
attr void \
|
||||||
|
name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
struct type *tmp; \
|
||||||
|
while ((elm == NULL || RB_COLOR(elm, field) == RB_BLACK) && \
|
||||||
|
elm != RB_ROOT(head)) { \
|
||||||
|
if (RB_LEFT(parent, field) == elm) { \
|
||||||
|
tmp = RB_RIGHT(parent, field); \
|
||||||
|
if (RB_COLOR(tmp, field) == RB_RED) { \
|
||||||
|
RB_SET_BLACKRED(tmp, parent, field); \
|
||||||
|
RB_ROTATE_LEFT(head, parent, tmp, field);\
|
||||||
|
tmp = RB_RIGHT(parent, field); \
|
||||||
|
} \
|
||||||
|
if ((RB_LEFT(tmp, field) == NULL || \
|
||||||
|
RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) &&\
|
||||||
|
(RB_RIGHT(tmp, field) == NULL || \
|
||||||
|
RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) {\
|
||||||
|
RB_COLOR(tmp, field) = RB_RED; \
|
||||||
|
elm = parent; \
|
||||||
|
parent = RB_PARENT(elm, field); \
|
||||||
|
} else { \
|
||||||
|
if (RB_RIGHT(tmp, field) == NULL || \
|
||||||
|
RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK) {\
|
||||||
|
struct type *oleft; \
|
||||||
|
if ((oleft = RB_LEFT(tmp, field)) \
|
||||||
|
!= NULL) \
|
||||||
|
RB_COLOR(oleft, field) = RB_BLACK;\
|
||||||
|
RB_COLOR(tmp, field) = RB_RED; \
|
||||||
|
RB_ROTATE_RIGHT(head, tmp, oleft, field);\
|
||||||
|
tmp = RB_RIGHT(parent, field); \
|
||||||
|
} \
|
||||||
|
RB_COLOR(tmp, field) = RB_COLOR(parent, field);\
|
||||||
|
RB_COLOR(parent, field) = RB_BLACK; \
|
||||||
|
if (RB_RIGHT(tmp, field)) \
|
||||||
|
RB_COLOR(RB_RIGHT(tmp, field), field) = RB_BLACK;\
|
||||||
|
RB_ROTATE_LEFT(head, parent, tmp, field);\
|
||||||
|
elm = RB_ROOT(head); \
|
||||||
|
break; \
|
||||||
|
} \
|
||||||
|
} else { \
|
||||||
|
tmp = RB_LEFT(parent, field); \
|
||||||
|
if (RB_COLOR(tmp, field) == RB_RED) { \
|
||||||
|
RB_SET_BLACKRED(tmp, parent, field); \
|
||||||
|
RB_ROTATE_RIGHT(head, parent, tmp, field);\
|
||||||
|
tmp = RB_LEFT(parent, field); \
|
||||||
|
} \
|
||||||
|
if ((RB_LEFT(tmp, field) == NULL || \
|
||||||
|
RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) &&\
|
||||||
|
(RB_RIGHT(tmp, field) == NULL || \
|
||||||
|
RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) {\
|
||||||
|
RB_COLOR(tmp, field) = RB_RED; \
|
||||||
|
elm = parent; \
|
||||||
|
parent = RB_PARENT(elm, field); \
|
||||||
|
} else { \
|
||||||
|
if (RB_LEFT(tmp, field) == NULL || \
|
||||||
|
RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) {\
|
||||||
|
struct type *oright; \
|
||||||
|
if ((oright = RB_RIGHT(tmp, field)) \
|
||||||
|
!= NULL) \
|
||||||
|
RB_COLOR(oright, field) = RB_BLACK;\
|
||||||
|
RB_COLOR(tmp, field) = RB_RED; \
|
||||||
|
RB_ROTATE_LEFT(head, tmp, oright, field);\
|
||||||
|
tmp = RB_LEFT(parent, field); \
|
||||||
|
} \
|
||||||
|
RB_COLOR(tmp, field) = RB_COLOR(parent, field);\
|
||||||
|
RB_COLOR(parent, field) = RB_BLACK; \
|
||||||
|
if (RB_LEFT(tmp, field)) \
|
||||||
|
RB_COLOR(RB_LEFT(tmp, field), field) = RB_BLACK;\
|
||||||
|
RB_ROTATE_RIGHT(head, parent, tmp, field);\
|
||||||
|
elm = RB_ROOT(head); \
|
||||||
|
break; \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
if (elm) \
|
||||||
|
RB_COLOR(elm, field) = RB_BLACK; \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
attr struct type * \
|
||||||
|
name##_RB_REMOVE(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
struct type *child, *parent, *old = elm; \
|
||||||
|
int color; \
|
||||||
|
if (RB_LEFT(elm, field) == NULL) \
|
||||||
|
child = RB_RIGHT(elm, field); \
|
||||||
|
else if (RB_RIGHT(elm, field) == NULL) \
|
||||||
|
child = RB_LEFT(elm, field); \
|
||||||
|
else { \
|
||||||
|
struct type *left; \
|
||||||
|
elm = RB_RIGHT(elm, field); \
|
||||||
|
while ((left = RB_LEFT(elm, field)) != NULL) \
|
||||||
|
elm = left; \
|
||||||
|
child = RB_RIGHT(elm, field); \
|
||||||
|
parent = RB_PARENT(elm, field); \
|
||||||
|
color = RB_COLOR(elm, field); \
|
||||||
|
if (child) \
|
||||||
|
RB_PARENT(child, field) = parent; \
|
||||||
|
if (parent) { \
|
||||||
|
if (RB_LEFT(parent, field) == elm) \
|
||||||
|
RB_LEFT(parent, field) = child; \
|
||||||
|
else \
|
||||||
|
RB_RIGHT(parent, field) = child; \
|
||||||
|
RB_AUGMENT(parent); \
|
||||||
|
} else \
|
||||||
|
RB_ROOT(head) = child; \
|
||||||
|
if (RB_PARENT(elm, field) == old) \
|
||||||
|
parent = elm; \
|
||||||
|
(elm)->field = (old)->field; \
|
||||||
|
if (RB_PARENT(old, field)) { \
|
||||||
|
if (RB_LEFT(RB_PARENT(old, field), field) == old)\
|
||||||
|
RB_LEFT(RB_PARENT(old, field), field) = elm;\
|
||||||
|
else \
|
||||||
|
RB_RIGHT(RB_PARENT(old, field), field) = elm;\
|
||||||
|
RB_AUGMENT(RB_PARENT(old, field)); \
|
||||||
|
} else \
|
||||||
|
RB_ROOT(head) = elm; \
|
||||||
|
RB_PARENT(RB_LEFT(old, field), field) = elm; \
|
||||||
|
if (RB_RIGHT(old, field)) \
|
||||||
|
RB_PARENT(RB_RIGHT(old, field), field) = elm; \
|
||||||
|
if (parent) { \
|
||||||
|
left = parent; \
|
||||||
|
do { \
|
||||||
|
RB_AUGMENT(left); \
|
||||||
|
} while ((left = RB_PARENT(left, field)) != NULL); \
|
||||||
|
} \
|
||||||
|
goto color; \
|
||||||
|
} \
|
||||||
|
parent = RB_PARENT(elm, field); \
|
||||||
|
color = RB_COLOR(elm, field); \
|
||||||
|
if (child) \
|
||||||
|
RB_PARENT(child, field) = parent; \
|
||||||
|
if (parent) { \
|
||||||
|
if (RB_LEFT(parent, field) == elm) \
|
||||||
|
RB_LEFT(parent, field) = child; \
|
||||||
|
else \
|
||||||
|
RB_RIGHT(parent, field) = child; \
|
||||||
|
RB_AUGMENT(parent); \
|
||||||
|
} else \
|
||||||
|
RB_ROOT(head) = child; \
|
||||||
|
color: \
|
||||||
|
if (color == RB_BLACK) \
|
||||||
|
name##_RB_REMOVE_COLOR(head, parent, child); \
|
||||||
|
return (old); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
/* Inserts a node into the RB tree */ \
|
||||||
|
attr struct type * \
|
||||||
|
name##_RB_INSERT(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
struct type *tmp; \
|
||||||
|
struct type *parent = NULL; \
|
||||||
|
int comp = 0; \
|
||||||
|
tmp = RB_ROOT(head); \
|
||||||
|
while (tmp) { \
|
||||||
|
parent = tmp; \
|
||||||
|
comp = (cmp)(elm, parent); \
|
||||||
|
if (comp < 0) \
|
||||||
|
tmp = RB_LEFT(tmp, field); \
|
||||||
|
else if (comp > 0) \
|
||||||
|
tmp = RB_RIGHT(tmp, field); \
|
||||||
|
else \
|
||||||
|
return (tmp); \
|
||||||
|
} \
|
||||||
|
RB_SET(elm, parent, field); \
|
||||||
|
if (parent != NULL) { \
|
||||||
|
if (comp < 0) \
|
||||||
|
RB_LEFT(parent, field) = elm; \
|
||||||
|
else \
|
||||||
|
RB_RIGHT(parent, field) = elm; \
|
||||||
|
RB_AUGMENT(parent); \
|
||||||
|
} else \
|
||||||
|
RB_ROOT(head) = elm; \
|
||||||
|
name##_RB_INSERT_COLOR(head, elm); \
|
||||||
|
return (NULL); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
/* Finds the node with the same key as elm */ \
|
||||||
|
attr struct type * \
|
||||||
|
name##_RB_FIND(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
struct type *tmp = RB_ROOT(head); \
|
||||||
|
int comp; \
|
||||||
|
while (tmp) { \
|
||||||
|
comp = cmp(elm, tmp); \
|
||||||
|
if (comp < 0) \
|
||||||
|
tmp = RB_LEFT(tmp, field); \
|
||||||
|
else if (comp > 0) \
|
||||||
|
tmp = RB_RIGHT(tmp, field); \
|
||||||
|
else \
|
||||||
|
return (tmp); \
|
||||||
|
} \
|
||||||
|
return (NULL); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
/* Finds the first node greater than or equal to the search key */ \
|
||||||
|
attr struct type * \
|
||||||
|
name##_RB_NFIND(struct name *head, struct type *elm) \
|
||||||
|
{ \
|
||||||
|
struct type *tmp = RB_ROOT(head); \
|
||||||
|
struct type *res = NULL; \
|
||||||
|
int comp; \
|
||||||
|
while (tmp) { \
|
||||||
|
comp = cmp(elm, tmp); \
|
||||||
|
if (comp < 0) { \
|
||||||
|
res = tmp; \
|
||||||
|
tmp = RB_LEFT(tmp, field); \
|
||||||
|
} \
|
||||||
|
else if (comp > 0) \
|
||||||
|
tmp = RB_RIGHT(tmp, field); \
|
||||||
|
else \
|
||||||
|
return (tmp); \
|
||||||
|
} \
|
||||||
|
return (res); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
/* ARGSUSED */ \
|
||||||
|
attr struct type * \
|
||||||
|
name##_RB_NEXT(struct type *elm) \
|
||||||
|
{ \
|
||||||
|
if (RB_RIGHT(elm, field)) { \
|
||||||
|
elm = RB_RIGHT(elm, field); \
|
||||||
|
while (RB_LEFT(elm, field)) \
|
||||||
|
elm = RB_LEFT(elm, field); \
|
||||||
|
} else { \
|
||||||
|
if (RB_PARENT(elm, field) && \
|
||||||
|
(elm == RB_LEFT(RB_PARENT(elm, field), field))) \
|
||||||
|
elm = RB_PARENT(elm, field); \
|
||||||
|
else { \
|
||||||
|
while (RB_PARENT(elm, field) && \
|
||||||
|
(elm == RB_RIGHT(RB_PARENT(elm, field), field)))\
|
||||||
|
elm = RB_PARENT(elm, field); \
|
||||||
|
elm = RB_PARENT(elm, field); \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
return (elm); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
/* ARGSUSED */ \
|
||||||
|
attr struct type * \
|
||||||
|
name##_RB_PREV(struct type *elm) \
|
||||||
|
{ \
|
||||||
|
if (RB_LEFT(elm, field)) { \
|
||||||
|
elm = RB_LEFT(elm, field); \
|
||||||
|
while (RB_RIGHT(elm, field)) \
|
||||||
|
elm = RB_RIGHT(elm, field); \
|
||||||
|
} else { \
|
||||||
|
if (RB_PARENT(elm, field) && \
|
||||||
|
(elm == RB_RIGHT(RB_PARENT(elm, field), field))) \
|
||||||
|
elm = RB_PARENT(elm, field); \
|
||||||
|
else { \
|
||||||
|
while (RB_PARENT(elm, field) && \
|
||||||
|
(elm == RB_LEFT(RB_PARENT(elm, field), field)))\
|
||||||
|
elm = RB_PARENT(elm, field); \
|
||||||
|
elm = RB_PARENT(elm, field); \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
return (elm); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
attr struct type * \
|
||||||
|
name##_RB_MINMAX(struct name *head, int val) \
|
||||||
|
{ \
|
||||||
|
struct type *tmp = RB_ROOT(head); \
|
||||||
|
struct type *parent = NULL; \
|
||||||
|
while (tmp) { \
|
||||||
|
parent = tmp; \
|
||||||
|
if (val < 0) \
|
||||||
|
tmp = RB_LEFT(tmp, field); \
|
||||||
|
else \
|
||||||
|
tmp = RB_RIGHT(tmp, field); \
|
||||||
|
} \
|
||||||
|
return (parent); \
|
||||||
|
}
|
||||||
|
|
||||||
|
#define RB_NEGINF -1
|
||||||
|
#define RB_INF 1
|
||||||
|
|
||||||
|
#define RB_INSERT(name, x, y) name##_RB_INSERT(x, y)
|
||||||
|
#define RB_REMOVE(name, x, y) name##_RB_REMOVE(x, y)
|
||||||
|
#define RB_FIND(name, x, y) name##_RB_FIND(x, y)
|
||||||
|
#define RB_NFIND(name, x, y) name##_RB_NFIND(x, y)
|
||||||
|
#define RB_NEXT(name, x, y) name##_RB_NEXT(y)
|
||||||
|
#define RB_PREV(name, x, y) name##_RB_PREV(y)
|
||||||
|
#define RB_MIN(name, x) name##_RB_MINMAX(x, RB_NEGINF)
|
||||||
|
#define RB_MAX(name, x) name##_RB_MINMAX(x, RB_INF)
|
||||||
|
|
||||||
|
#define RB_FOREACH(x, name, head) \
|
||||||
|
for ((x) = RB_MIN(name, head); \
|
||||||
|
(x) != NULL; \
|
||||||
|
(x) = name##_RB_NEXT(x))
|
||||||
|
|
||||||
|
#define RB_FOREACH_REVERSE(x, name, head) \
|
||||||
|
for ((x) = RB_MAX(name, head); \
|
||||||
|
(x) != NULL; \
|
||||||
|
(x) = name##_RB_PREV(x))
|
||||||
|
|
||||||
|
#endif /* _SYS_TREE_H_ */
|
||||||
Loading…
Reference in New Issue