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trace.c
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trace.c
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/* {{{
This file is part of libtraceproc - a library for tracing Pro*C/OCI calls
Copyright (C) 2013 Georg Sauthoff <mail@georg.so>
This program 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 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
}}} */
#include "trace.h"
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include "timespec.h"
struct Trace_State {
FILE *file;
char format[32];
bool last_was_nl;
};
typedef struct Trace_State Trace_State;
static Trace_State trace_state = {0};
void trace_set_file(FILE *file)
{
trace_state.file = file;
trace_state.last_was_nl = true;
}
void trace_set_ftime(const char *format)
{
strncpy(trace_state.format, format, 31);
}
int tprintf(const char *format, ...)
{
int code = 0;
int ret_t = 0;
if (trace_state.last_was_nl && *trace_state.format) {
struct timespec ts = {0};
int ret_clock = clock_gettime(CLOCK_REALTIME, &ts);
char prefix[32] = {0};
if (ret_clock) {
fprintf(stderr, "clock_gettime: %s\n", strerror(errno));
strcpy(prefix, "XXX ");
code = -1;
} else {
size_t ret_strf = timespec_strftime(prefix, 32, trace_state.format, &ts);
if (!ret_strf) {
*prefix = 0;
code = -1;
}
}
ret_t = fprintf(trace_state.file, "%s", prefix);
}
va_list args;
va_start(args, format);
int ret_f = vfprintf(trace_state.file, format, args);
va_end(args);
size_t n = strlen(format);
if (n)
--n;
trace_state.last_was_nl = format[n] == '\n';
if (code >= 0)
code = ret_t + ret_f;
return code;
}