97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
/**
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* @file lv_utils.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include <stddef.h>
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#include "lv_utils.h"
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#include "lv_fs.h"
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#include "cache/lv_image_cache.h"
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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void * _lv_utils_bsearch(const void * key, const void * base, uint32_t n, uint32_t size,
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int32_t (*cmp)(const void * pRef, const void * pElement))
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{
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const char * middle;
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int32_t c;
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for(middle = base; n != 0;) {
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middle += (n / 2) * size;
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if((c = (*cmp)(key, middle)) > 0) {
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n = (n / 2) - ((n & 1) == 0);
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base = (middle += size);
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}
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else if(c < 0) {
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n /= 2;
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middle = base;
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}
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else {
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return (char *)middle;
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}
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}
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return NULL;
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}
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lv_result_t lv_draw_buf_save_to_file(const lv_draw_buf_t * draw_buf, const char * path)
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{
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lv_fs_file_t file;
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lv_fs_res_t res = lv_fs_open(&file, path, LV_FS_MODE_WR);
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if(res != LV_FS_RES_OK) {
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LV_LOG_ERROR("create file %s failed", path);
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return LV_RESULT_INVALID;
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}
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/*Image content modified, invalidate image cache.*/
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lv_image_cache_drop(path);
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uint32_t bw;
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res = lv_fs_write(&file, &draw_buf->header, sizeof(draw_buf->header), &bw);
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if(res != LV_FS_RES_OK || bw != sizeof(draw_buf->header)) {
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LV_LOG_ERROR("write draw_buf->header failed");
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lv_fs_close(&file);
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return LV_RESULT_INVALID;
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}
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res = lv_fs_write(&file, draw_buf->data, draw_buf->data_size, &bw);
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if(res != LV_FS_RES_OK || bw != draw_buf->data_size) {
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LV_LOG_ERROR("write draw_buf->data failed");
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lv_fs_close(&file);
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return LV_RESULT_INVALID;
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}
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lv_fs_close(&file);
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LV_LOG_TRACE("saved draw_buf to %s", path);
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return LV_RESULT_OK;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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