From: Mathieu Pilato <redacted>
Date: Fri, 31 Mar 2023 08:09:12 +0000 (+0200)
Subject: binary_helpers: Add bv_get_value function.
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=9697b4a5a4be6639909fe0f10bd10f8a486e036b;p=libsigrok.git

binary_helpers: Add bv_get_value function.
---

diff --git a/src/binary_helpers.c b/src/binary_helpers.c
index 72c05ef1..7482371c 100644
--- a/src/binary_helpers.c
+++ b/src/binary_helpers.c
@@ -62,3 +62,54 @@ SR_PRIV int bv_get_value_len(float *out, const struct binary_value_spec *spec,
 		*out = value;
 	return SR_OK;
 }
+
+SR_PRIV int bv_get_value(float *out, const struct binary_value_spec *spec,
+	const uint8_t *data)
+{
+	float value;
+	const uint8_t *ptr;
+
+	ptr = &data[spec->offset];
+
+	switch (spec->type) {
+	case BVT_UINT8:
+		value = read_u8(ptr);
+		break;
+	case BVT_BE_UINT16:
+		value = read_u16be(ptr);
+		break;
+	case BVT_BE_UINT24:
+		value = read_u24be(ptr);
+		break;
+	case BVT_BE_UINT32:
+		value = read_u32be(ptr);
+		break;
+	case BVT_BE_UINT64:
+		value = read_u64be(ptr);
+		break;
+	case BVT_BE_FLOAT:
+		value = read_fltbe(ptr);
+		break;
+	case BVT_LE_UINT16:
+		value = read_u16le(ptr);
+		break;
+	case BVT_LE_UINT24:
+		value = read_u24le(ptr);
+		break;
+	case BVT_LE_UINT32:
+		value = read_u32le(ptr);
+		break;
+	case BVT_LE_UINT64:
+		value = read_u64le(ptr);
+		break;
+	case BVT_LE_FLOAT:
+		value = read_fltle(ptr);
+		break;
+	default:
+		return SR_ERR_ARG;
+	}
+
+	if (out)
+		*out = value;
+	return SR_OK;
+}
diff --git a/src/libsigrok-internal.h b/src/libsigrok-internal.h
index b47a8e5d..bb2fc6cc 100644
--- a/src/libsigrok-internal.h
+++ b/src/libsigrok-internal.h
@@ -2253,6 +2253,18 @@ struct binary_value_spec {
 SR_PRIV int bv_get_value_len(float *out, const struct binary_value_spec *spec,
 	const uint8_t *data, size_t length);
 
+/**
+ * Read extract a value from a binary data image, without bound check.
+ *
+ * @param[out] out Pointer to output buffer (conversion result)
+ * @param[in] spec Binary value specification
+ * @param[in] data Pointer to binary input data
+ *
+ * @return SR_OK on success, SR_ERR_* error code on failure.
+ */
+SR_PRIV int bv_get_value(float *out, const struct binary_value_spec *spec,
+	const uint8_t *data);
+
 /*--- crc.c -----------------------------------------------------------------*/
 
 #define SR_CRC16_DEFAULT_INIT 0xffffU