1 files changed, 81 insertions, 0 deletions
diff --git a/libs/bitfield-c/src/canutil/read.h b/libs/bitfield-c/src/canutil/read.h
new file mode 100644
index 0000000..86fea78
--- /dev/null
+++ b/libs/bitfield-c/src/canutil/read.h
@@ -0,0 +1,81 @@
+#ifndef __READ_H__
+#define __READ_H__
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Public: Parse a CAN signal from a message and apply required transformation.
+ *
+ * source - the payload containing the signal.
+ * bit_offset - the starting bit for the signal.
+ * bit_size - the width of the signal.
+ * factor - the transformation factor for the signal value, applied after
+ *      pulling out the bit field. Use 1.0 for no factor.
+ * offset - the transformation offset for the signal value, applied after
+ *      pulling out the bit field. Use 0 for no offset.
+ *
+ * Returns the decoded and transformed value of the signal.
+ */
+float eightbyte_parse_float(const uint64_t source, const uint8_t bit_offset,
+        const uint8_t bit_size, const float factor, const float offset);
+
+/* Public: Parse a CAN signal from a message storage as a byte array and apply
+ * required transformation.
+ *
+ * source - the payload containing the signal.
+ * source_size - the size of the payload in bytes.
+ * bit_offset - the starting bit for the signal.
+ * bit_size - the width of the signal.
+ * factor - the transformation factor for the signal value, applied after
+ *      pulling out the bit field. Use 1.0 for no factor.
+ * offset - the transformation offset for the signal value, applied after
+ *      pulling out the bit field. Use 0 for no offset.
+ *
+ * Returns the decoded and transformed value of the signal.
+ */
+float bitfield_parse_float(const uint8_t source[], const uint16_t source_size,
+        const uint8_t bit_offset, const uint8_t bit_size, const float factor,
+        const float offset);
+
+/* Public: Parse a CAN signal from a message and interpret it as a boolean.
+ *
+ * source - the payload containing the signal.
+ * bit_offset - the starting bit for the signal.
+ * bit_size - the width of the signal.
+ * factor - the transformation factor for the signal value, applied after
+ *      pulling out the bit field. Use 1.0 for no factor.
+ * offset - the transformation offset for the signal value, applied after
+ *      pulling out the bit field. Use 0 for no offset.
+ *
+ * Returns false if the value was 0, otherwise true.
+ */
+bool eightbyte_parse_bool(uint64_t source, uint8_t bit_offset, uint8_t bit_size,
+        float factor, float offset);
+
+/* Public: Parse a CAN signal from a message storage as a byte array and
+ * interpret it as a boolean.
+ *
+ * source - the payload containing the signal.
+ * source_size - the size of the payload in bytes.
+ * bit_offset - the starting bit for the signal.
+ * bit_size - the width of the signal.
+ * factor - the transformation factor for the signal value, applied after
+ *      pulling out the bit field. Use 1.0 for no factor.
+ * offset - the transformation offset for the signal value, applied after
+ *      pulling out the bit field. Use 0 for no offset.
+ *
+ * Returns false if the value was 0, otherwise true.
+ */
+bool bitfield_parse_bool(const uint8_t source[], const uint16_t source_size,
+        const uint8_t bit_offset, const uint8_t bit_size, const float factor,
+        const float offset);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // __READ_H__