1 /**
2 * @file lv_log.c
3 *
4 */
5
6 /*********************
7 * INCLUDES
8 *********************/
9 #include "lv_log.h"
10 #if LV_USE_LOG
11
12 #include <stdarg.h>
13 #include <string.h>
14 #include "lv_printf.h"
15
16 #if LV_LOG_PRINTF
17 #include <stdio.h>
18 #endif
19
20 /*********************
21 * DEFINES
22 *********************/
23
24 /**********************
25 * TYPEDEFS
26 **********************/
27
28 /**********************
29 * STATIC PROTOTYPES
30 **********************/
31
32 /**********************
33 * STATIC VARIABLES
34 **********************/
35 static lv_log_print_g_cb_t custom_print_cb;
36
37 /**********************
38 * MACROS
39 **********************/
40
41 /**********************
42 * GLOBAL FUNCTIONS
43 **********************/
44
45 /**
46 * Register custom print/write function to call when a log is added.
47 * It can format its "File path", "Line number" and "Description" as required
48 * and send the formatted log message to a console or serial port.
49 * @param print_cb a function pointer to print a log
50 */
lv_log_register_print_cb(lv_log_print_g_cb_t print_cb)51 void lv_log_register_print_cb(lv_log_print_g_cb_t print_cb)
52 {
53 custom_print_cb = print_cb;
54 }
55
56
57 /**
58 * Add a log
59 * @param level the level of log. (From `lv_log_level_t` enum)
60 * @param file name of the file when the log added
61 * @param line line number in the source code where the log added
62 * @param func name of the function when the log added
63 * @param format printf-like format string
64 * @param ... parameters for `format`
65 */
_lv_log_add(lv_log_level_t level,const char * file,int line,const char * func,const char * format,...)66 void _lv_log_add(lv_log_level_t level, const char * file, int line, const char * func, const char * format, ...)
67 {
68 if(level >= _LV_LOG_LEVEL_NUM) return; /*Invalid level*/
69
70 if(level >= LV_LOG_LEVEL) {
71 va_list args;
72 va_start(args, format);
73 char buf[256];
74 lv_vsnprintf(buf, sizeof(buf), format, args);
75 va_end(args);
76
77 #if LV_LOG_PRINTF
78 /*Use only the file name not the path*/
79 size_t p;
80 for(p = strlen(file); p > 0; p--) {
81 if(file[p] == '/' || file[p] == '\\') {
82 p++; /*Skip the slash*/
83 break;
84 }
85 }
86
87 static const char * lvl_prefix[] = {"Trace", "Info", "Warn", "Error", "User"};
88 printf("%s: %s \t(%s #%d %s())\n", lvl_prefix[level], buf, &file[p], line, func);
89 #else
90 if(custom_print_cb) custom_print_cb(level, file, line, func, buf);
91 #endif
92 }
93 }
94
95 /**********************
96 * STATIC FUNCTIONS
97 **********************/
98
99 #endif /*LV_USE_LOG*/
100
