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