[quiz][ion/test] Move time measurements to quiz

to be able to do measurements in any test

quiz/Makefile

@@ -14,6 +14,7 @@ runner_src += $(addprefix quiz/src/, \
   assertions.cpp \
   i18n.cpp \
   runner.cpp \
+  stopwatch.cpp \
 )
 
 runner_src += $(BUILD_DIR)/quiz/src/tests_symbols.c

quiz/include/quiz/stopwatch.h

@@ -0,0 +1,17 @@
+#ifndef QUIZ_STOPWATCH_H
+#define QUIZ_STOPWATCH_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+uint64_t quiz_stopwatch_start();
+void quiz_stopwatch_print_lap(uint64_t startTime);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

quiz/src/runner.cpp

@@ -1,8 +1,6 @@
 #include "quiz.h"
 #include "symbols.h"
-#include <string.h>
 #include <ion.h>
-#include <kandinsky.h>
 #include <poincare/init.h>
 #include <poincare/tree_pool.h>
 #include <poincare/exception_checkpoint.h>

quiz/src/stopwatch.cpp

@@ -0,0 +1,36 @@
+#include <quiz/stopwatch.h>
+#include "quiz.h"
+#include <ion/timing.h>
+#include <string.h>
+
+uint64_t quiz_stopwatch_start() {
+  return Ion::Timing::millis();
+}
+
+static size_t uint64ToString(uint64_t n, char buffer[]) {
+  size_t len = 0;
+  do {
+    buffer[len++] = (n % 10) + '0';
+  } while ((n /= 10) > 0);
+  int i = 0;
+  int j = len - 1;
+  while (i < j) {
+    char c = buffer[i];
+    buffer[i++] = buffer[j];
+    buffer[j--] = c;
+  }
+  return len;
+}
+
+void quiz_stopwatch_print_lap(uint64_t startTime) {
+  constexpr char Time[] = " time: ";
+  constexpr char Ms[] = "ms";
+  constexpr size_t uint64ToStringMaxLength = 20;
+  constexpr size_t MaxLength = sizeof(Time) + uint64ToStringMaxLength + sizeof(Ms) + 1;
+  char buffer[MaxLength];
+  char * position = buffer;
+  position += strlcpy(position, Time, sizeof(Time));
+  position += uint64ToString(Ion::Timing::millis() - startTime, position);
+  position += strlcpy(position, Ms, sizeof(Ms));
+  quiz_print(buffer);
+}