Cours 7

cours/inverted-pendulum/cutils.c

@@ -0,0 +1,88 @@
+/* This file is part of SyncContest.
+   Copyright (C) 2017-2020 Eugene Asarin, Mihaela Sighireanu, Adrien Guatto. */
+
+#include "cutils.h"
+
+#include <assert.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+log_verbosity_level level = LOG_INFO;
+FILE *f = NULL;
+char *filename = NULL;
+
+void log_set_verbosity_level(log_verbosity_level l) {
+  level = l;
+}
+
+void log_message_v(log_verbosity_level msg_level, const char *fmt, va_list va) {
+  va_list vb;
+  FILE *out = msg_level == LOG_INFO ? stdout : stderr;
+
+  if (msg_level > level)
+    return;
+
+  va_copy(vb, va);
+  if (f != NULL) {
+    vfprintf(f, fmt, va);
+  }
+
+  vfprintf(out, fmt, vb);
+  fflush(out);
+}
+
+void log_message(log_verbosity_level msg_level, const char *fmt, ...) {
+  va_list va;
+  va_start(va, fmt);
+  log_message_v(msg_level, fmt, va);
+  va_end(va);
+}
+
+void log_fatal(const char *fmt, ...) {
+  va_list va;
+  va_start(va, fmt);
+  log_message_v(LOG_FATAL, fmt, va);
+  va_end(va);
+  exit(EXIT_FAILURE);
+}
+
+void log_info(const char *fmt, ...) {
+  va_list va;
+  va_start(va, fmt);
+  log_message_v(LOG_INFO, fmt, va);
+  va_end(va);
+}
+
+void log_debug(const char *fmt, ...) {
+  va_list va;
+  va_start(va, fmt);
+  log_message_v(LOG_DEBUG, fmt, va);
+  va_end(va);
+}
+
+void log_init(const char *fn) {
+  if (!fn) {
+    log_info("[log] initializing, not saving to file\n");
+    return;
+  }
+
+  filename = strdup(fn);
+  assert (filename);
+  f = fopen(filename, "w");
+  if (!f)
+    log_fatal("[log] could not open log file %s (fopen)", filename);
+
+  log_info("[log] logging to %s\n", filename);
+}
+
+void log_shutdown() {
+  if (f) {
+    log_info("[log] shutting down, closing %s\n", filename);
+    fclose(f);
+    free(filename);
+  } else {
+    log_info("[log] shutting down\n");
+  }
+}