--- /dev/null
+#ifndef BABELTRACE_TRACE_IR_UTILS_INTERNAL_H
+#define BABELTRACE_TRACE_IR_UTILS_INTERNAL_H
+
+/*
+ * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "common/babeltrace.h"
+#include <babeltrace2/trace-ir/field-class.h>
+#include <stdint.h>
+
+#include "clock-class.h"
+
+struct search_query {
+ gpointer value;
+ int found;
+};
+
+static inline
+uint64_t bt_util_ns_from_value(uint64_t frequency, uint64_t value_cycles)
+{
+ uint64_t ns;
+
+ if (frequency == UINT64_C(1000000000)) {
+ ns = value_cycles;
+ } else {
+ double dblres = ((1e9 * (double) value_cycles) / (double) frequency);
+
+ if (dblres >= (double) UINT64_MAX) {
+ /* Overflows uint64_t */
+ ns = UINT64_C(-1);
+ } else {
+ ns = (uint64_t) dblres;
+ }
+ }
+
+ return ns;
+}
+
+static inline
+bool bt_util_get_base_offset_ns(int64_t offset_seconds, uint64_t offset_cycles,
+ uint64_t frequency, int64_t *base_offset_ns)
+{
+ bool overflows = false;
+ uint64_t offset_cycles_ns;
+
+ BT_ASSERT(base_offset_ns);
+
+ /* Initialize nanosecond timestamp to clock's offset in seconds */
+ if (offset_seconds <= (INT64_MIN / INT64_C(1000000000) - 1) ||
+ offset_seconds >= (INT64_MAX / INT64_C(1000000000)) - 1) {
+ /*
+ * Overflow: offset in seconds converted to nanoseconds
+ * is outside the int64_t range. We also subtract 1 here
+ * to leave "space" for the offset in cycles converted
+ * to nanoseconds (which is always less than 1 second by
+ * contract).
+ */
+ overflows = true;
+ goto end;
+ }
+
+ /* Offset (seconds) to nanoseconds */
+ *base_offset_ns = offset_seconds * INT64_C(1000000000);
+
+ /* Add offset in cycles */
+ BT_ASSERT(offset_cycles < frequency);
+ offset_cycles_ns = bt_util_ns_from_value(frequency,
+ offset_cycles);
+ BT_ASSERT(offset_cycles_ns < 1000000000);
+ *base_offset_ns += (int64_t) offset_cycles_ns;
+
+end:
+ return overflows;
+}
+
+static inline
+int bt_util_ns_from_origin_inline(int64_t base_offset_ns,
+ int64_t offset_seconds, uint64_t offset_cycles,
+ uint64_t frequency, uint64_t value, int64_t *ns_from_origin)
+{
+ int ret = 0;
+ uint64_t value_ns_unsigned;
+ int64_t value_ns_signed;
+
+ /* Initialize to clock class's base offset */
+ *ns_from_origin = base_offset_ns;
+
+ /* Add given value in cycles */
+ value_ns_unsigned = bt_util_ns_from_value(frequency, value);
+ if (value_ns_unsigned >= (uint64_t) INT64_MAX) {
+ /*
+ * FIXME: `value_ns_unsigned` could be greater than
+ * `INT64_MAX` in fact: in this case, we need to
+ * subtract `INT64_MAX` from `value_ns_unsigned`, make
+ * sure that the difference is less than `INT64_MAX`,
+ * and try to add them one after the other to
+ * `*ns_from_origin`.
+ */
+ ret = -1;
+ goto end;
+ }
+
+ value_ns_signed = (int64_t) value_ns_unsigned;
+ BT_ASSERT(value_ns_signed >= 0);
+
+ if (*ns_from_origin <= 0) {
+ goto add_value;
+ }
+
+ if (value_ns_signed > INT64_MAX - *ns_from_origin) {
+ ret = -1;
+ goto end;
+ }
+
+add_value:
+ *ns_from_origin += value_ns_signed;
+
+end:
+ return ret;
+}
+
+static inline
+int bt_util_ns_from_origin_clock_class(const struct bt_clock_class *clock_class,
+ uint64_t value, int64_t *ns_from_origin)
+{
+ int ret = 0;
+
+ if (clock_class->base_offset.overflows) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = bt_util_ns_from_origin_inline(clock_class->base_offset.value_ns,
+ clock_class->offset_seconds, clock_class->offset_cycles,
+ clock_class->frequency, value, ns_from_origin);
+
+end:
+ return ret;
+}
+
+static inline
+bool bt_util_value_is_in_range_signed(uint64_t size, int64_t value)
+{
+ int64_t min_value = UINT64_C(-1) << (size - 1);
+ int64_t max_value = (UINT64_C(1) << (size - 1)) - 1;
+ return value >= min_value && value <= max_value;
+}
+
+static inline
+bool bt_util_value_is_in_range_unsigned(unsigned int size, uint64_t value)
+{
+ uint64_t max_value = (size == 64) ? UINT64_MAX :
+ (UINT64_C(1) << size) - 1;
+ return value <= max_value;
+}
+
+#endif /* BABELTRACE_TRACE_IR_UTILS_INTERNAL_H */
projects / babeltrace.git / blobdiff