1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
#include <stdio.h>
#include <string.h> // strlen
#include <stdarg.h>
#include "utillog.h"
#define LOGGER_BUFFER_SIZE 256
#define LOGGER_PREFIX_SIZE 32
typedef struct {
logger_function callback;
void *context;
size_t pfxlen;
} logger_struct;
static logger_struct logger = { 0, NULL, 0 };
static char logger_buffer[LOGGER_BUFFER_SIZE+LOGGER_PREFIX_SIZE];
void loggerf (const char *format, ...)
{
va_list args;
int length;
va_start(args, format);
length = vsnprintf(logger_buffer + logger.pfxlen, LOGGER_BUFFER_SIZE, format, args);
if (length > 0)
{
if (length > LOGGER_BUFFER_SIZE)
length = LOGGER_BUFFER_SIZE;
}
else
{
loggerf("logger encoding error '%s'", format);
length = (int)strlen(logger_buffer);
}
length += (int)logger.pfxlen;
if (logger.callback)
logger.callback(logger_buffer, logger.context);
else
printf("\n%s\n", logger_buffer);
va_end(args);
}
void logger_callback (logger_function callback, void *context)
{
logger.callback = callback;
logger.context = context;
}
int logger_prefix (const char *prefix)
{
size_t pfxlen;
pfxlen = strlen(prefix);
if (pfxlen > LOGGER_PREFIX_SIZE)
return 0;
memcpy(logger_buffer, prefix, pfxlen);
logger.pfxlen = pfxlen;
return 1;
}
|