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annotate libmlk-core/mlk/core/trace.c @ 646:7e1eb7f6c049 default tip @

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misc: remove .clang
author David Demelier <markand@malikania.fr>
date Sun, 04 Feb 2024 15:24:37 +0100
parents 970cad994a95
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * trace.h -- non-fatal message logs
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3 *
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4 * Copyright (c) 2020-2023 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <stdio.h>
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21 #include <time.h>
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22
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23 #include "trace.h"
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24
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25 static void
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26 default_handler(const char *line)
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27 {
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28 assert(line);
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29
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30 puts(line);
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31 }
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32
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33 void (*mlk_trace_handler)(const char *) = default_handler;
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34
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35 void
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36 mlk_tracef(const char *fmt, ...)
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37 {
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38 assert(fmt);
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39
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40 va_list ap;
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41
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42 if (!mlk_trace_handler)
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43 return;
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44
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45 va_start(ap, fmt);
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46 mlk_traceva(fmt, ap);
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47 va_end(ap);
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48 }
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49
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50 void
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51 mlk_traceva(const char *fmt, va_list ap)
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52 {
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53 assert(fmt);
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54
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55 time_t timestamp;
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56 struct tm *calendar;
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57 size_t nw;
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58 char buf[MLK_TRACE_LINE_MAX + 16];
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59
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60 if (!mlk_trace_handler)
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61 return;
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62
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63 /*
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64 * Append default timestamp so that a line looks like this:
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65 *
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66 * 10:10:59: hello world
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67 */
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68 timestamp = time(NULL);
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69 calendar = localtime(&timestamp);
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70 nw = strftime(buf, sizeof (buf), "%T: ", calendar);
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71
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72 vsnprintf(buf + nw, sizeof (buf) - nw, fmt, ap);
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73 mlk_trace_handler(buf);
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74 }