Add 'CAN-binder/libs/bitfield-c/' from commit 'a34745ec93ae0a1d4f1b640dba8fb6702331a8e9'

git-subtree-dir: CAN-binder/libs/bitfield-c
git-subtree-mainline: b6c09cbda2b6b47981d65265184a21223e526d4a
git-subtree-split: a34745ec93ae0a1d4f1b640dba8fb6702331a8e9

1 files changed, 34 insertions, 0 deletions

diff --git a/CAN-binder/libs/bitfield-c/src/canutil/read.c b/CAN-binder/libs/bitfield-c/src/canutil/read.c
new file mode 100644
index 0000000..d0cbb71
--- /dev/null
+++ b/CAN-binder/libs/bitfield-c/src/canutil/read.c
@@ -0,0 +1,34 @@
+#include <canutil/read.h>
+#include <bitfield/bitfield.h>
+#include <bitfield/8byte.h>
+
+static float decode_float(uint64_t raw, float factor, float offset) {
+    return raw * factor + offset;
+}
+
+float eightbyte_parse_float(uint64_t data, uint8_t bit_offset, uint8_t bit_size,
+        float factor, float offset) {
+    return decode_float(eightbyte_get_bitfield(data, bit_offset, bit_size,
+                true), factor, offset);
+}
+
+bool eightbyte_parse_bool(uint64_t data, uint8_t bit_offset, uint8_t bit_size,
+        float factor, float offset) {
+    float value = eightbyte_parse_float(data, bit_offset, bit_size, factor, offset);
+    return value == 0.0 ? false : true;
+}
+
+float bitfield_parse_float(const uint8_t source[], const uint16_t source_length,
+        const uint8_t bit_offset, const uint8_t bit_size, const float factor,
+        const float offset) {
+    return decode_float(get_bitfield(source, source_length, bit_offset, bit_size),
+            factor, offset);
+}
+
+bool bitfield_parse_bool(const uint8_t source[], const uint16_t source_length,
+        const uint8_t bit_offset, const uint8_t bit_size, const float factor,
+        const float offset) {
+    float value = bitfield_parse_float(source, source_length, bit_offset,
+            bit_size, factor, offset);
+    return value == 0.0 ? false : true;
+}