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artiq/soc/runtime/log.c

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#include <stdarg.h>
#include <stdio.h>
#include "log.h"
static int buffer_index;
static char buffer[LOG_BUFFER_SIZE];
void log_va(const char *fmt, va_list args)
{
char outbuf[256];
int i, len;
len = vscnprintf(outbuf, sizeof(outbuf), fmt, args);
for(i=0;i<len;i++) {
buffer[buffer_index] = outbuf[i];
buffer_index = (buffer_index + 1) % LOG_BUFFER_SIZE;
}
buffer[buffer_index] = '\n';
buffer_index = (buffer_index + 1) % LOG_BUFFER_SIZE;
}
void log(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
log_va(fmt, args);
va_end(args);
}
void log_get(char *outbuf)
{
int i, j;
j = buffer_index + 1;
for(i=0;i<LOG_BUFFER_SIZE;i++) {
outbuf[i] = buffer[j];
j = (j + 1) % LOG_BUFFER_SIZE;
}
}