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/* This file is part of GNU Dico.
Copyright (C) 2008-2024 Sergey Poznyakoff
GNU Dico is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Dico is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Dico. If not, see <http://www.gnu.org/licenses/>. */
/* Implementation of a "debug stream", a write-only stream useful
for printing debugging diagnostics. */
#include <config.h>
#include <dico.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/time.h>
struct dbg_stream {
dico_stream_t transport; /* Transport log-stream */
const char *file; /* Source file */
unsigned line; /* Source line */
int ts; /* Print timestamps */
};
static char *
fmtline(unsigned num, char *buf, size_t bufsize)
{
char *p = buf + bufsize;
*--p = 0;
while (p > buf) {
unsigned x = num % 10;
*--p = x + '0';
num /= 10;
if (num == 0)
break;
}
return p;
}
static int
dbg_write(void *data, const char *buf, size_t size, size_t *pret)
{
struct dbg_stream *p = data;
if (p->ts) {
char nbuf[128], *s;
struct timeval tv;
gettimeofday(&tv, NULL);
dico_stream_write(p->transport, "[", 1);
s = fmtline(tv.tv_sec, nbuf, sizeof(nbuf));
dico_stream_write(p->transport, s, strlen(s));
dico_stream_write(p->transport, ".", 1);
s = fmtline(tv.tv_usec, nbuf, sizeof(nbuf));
dico_stream_write(p->transport, s, strlen(s));
dico_stream_write(p->transport, "] ", 2);
}
if (p->file) {
char *s;
char nbuf[128];
dico_stream_write(p->transport, p->file, strlen(p->file));
dico_stream_write(p->transport, ":", 1);
s = fmtline(p->line, nbuf, sizeof(nbuf));
dico_stream_write(p->transport, s, strlen(s));
dico_stream_write(p->transport, ": ", 2);
}
dico_stream_write(p->transport, buf, size);
if (pret)
*pret = size;
return 0;
}
static int
dbg_destroy(void *data)
{
struct dbg_stream *p = data;
dico_stream_destroy(&p->transport);
free(data);
return 0;
}
static int
dbg_ioctl(void *data, int code, void *call_data)
{
struct dbg_stream *p = data;
switch (code) {
case DICO_DBG_CTL_SET_FILE:
p->file = call_data;
break;
case DICO_DBG_CTL_SET_LINE:
p->line = *(unsigned*)call_data;
break;
case DICO_DBG_CTL_SET_TS:
p->ts = *(int*)call_data;
break;
default:
errno = EINVAL;
return 1;
}
return 0;
}
dico_stream_t
dico_dbg_stream_create(void)
{
struct dbg_stream *p = malloc(sizeof(*p));
dico_stream_t stream;
if (!p || dico_stream_create(&stream, DICO_STREAM_WRITE, p))
return NULL;
dico_stream_set_write(stream, dbg_write);
dico_stream_set_destroy(stream, dbg_destroy);
dico_stream_set_ioctl(stream, dbg_ioctl);
dico_stream_set_buffer(stream, dico_buffer_line, 1024);
p->transport = dico_log_stream_create(L_DEBUG);
p->file = NULL;
p->line = 0;
return stream;
}
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