From 33527cb9e51da2c82f89d975e69fec23e607dea8 Mon Sep 17 00:00:00 2001
From: Dirk Hohndel <dirk@hohndel.org>
Date: Sat, 30 Oct 2021 13:23:47 -0700
Subject: [PATCH] core: add more C interfaces for fingerprint table

These are used to read/write fingerprint records as git or XML data from
C code.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
---
 core/device.cpp | 51 +++++++++++++++++++++++++++++++++++++++++++++++++
 core/device.h   | 10 ++++++++++
 2 files changed, 61 insertions(+)

diff --git a/core/device.cpp b/core/device.cpp
index 4b7eb9213..4d2220ff9 100644
--- a/core/device.cpp
+++ b/core/device.cpp
@@ -252,3 +252,54 @@ extern "C" void create_fingerprint_node(struct fingerprint_table *table, uint32_
 		table->fingerprints.insert(it, fpr);
 	}
 }
+
+extern "C" void create_fingerprint_node_from_hex(struct fingerprint_table *table, uint32_t model, uint32_t serial,
+						const char *hex_data, uint32_t fdeviceid, uint32_t fdiveid)
+{
+	QByteArray raw = QByteArray::fromHex(hex_data);
+	create_fingerprint_node(table, model, serial,
+				(const unsigned char *)raw.constData(), raw.size(), fdeviceid, fdiveid);
+}
+
+extern "C" int nr_fingerprints(struct fingerprint_table *table)
+{
+	return table->fingerprints.size();
+}
+
+extern "C" uint32_t fp_get_model(struct fingerprint_table *table, unsigned int i)
+{
+	if (!table || i >= table->fingerprints.size())
+		return 0;
+	return table->fingerprints[i].model;
+}
+
+extern "C" uint32_t fp_get_serial(struct fingerprint_table *table, unsigned int i)
+{
+	if (!table || i >= table->fingerprints.size())
+		return 0;
+	return table->fingerprints[i].serial;
+}
+
+extern "C" uint32_t fp_get_deviceid(struct fingerprint_table *table, unsigned int i)
+{
+	if (!table || i >= table->fingerprints.size())
+		return 0;
+	return table->fingerprints[i].fdeviceid;
+}
+
+extern "C" uint32_t fp_get_diveid(struct fingerprint_table *table, unsigned int i)
+{
+	if (!table || i >= table->fingerprints.size())
+		return 0;
+	return table->fingerprints[i].fdiveid;
+}
+
+extern "C" char *fp_get_data(struct fingerprint_table *table, unsigned int i)
+{
+	if (!table || i >= table->fingerprints.size())
+		return 0;
+	struct fingerprint_record *fpr = &table->fingerprints[i];
+	// fromRawData() avoids one copy of the raw_data
+	QByteArray hex = QByteArray::fromRawData((char *)fpr->raw_data, fpr->fsize).toHex();
+	return strdup(hex.constData());
+}
diff --git a/core/device.h b/core/device.h
index 95c1f7694..720f0db5c 100644
--- a/core/device.h
+++ b/core/device.h
@@ -44,9 +44,19 @@ extern void free_device_table(struct device_table *devices);
 // create fingerprint entry - raw data remains owned by caller
 extern void create_fingerprint_node(struct fingerprint_table *table, uint32_t model, uint32_t serial,
 				   const unsigned char *raw_data, unsigned int fsize, uint32_t fdeviceid, uint32_t fdiveid);
+extern void create_fingerprint_node_from_hex(struct fingerprint_table *table, uint32_t model, uint32_t serial,
+					    const char *hex_data, uint32_t fdeviceid, uint32_t fdiveid);
 // look up the fingerprint for model/serial - returns the number of bytes in the fingerprint; memory owned by the table
 extern unsigned int get_fingerprint_data(const struct fingerprint_table *table, uint32_t model, uint32_t serial, const unsigned char **fp_out);
 
+// access the fingerprint data from C
+extern int nr_fingerprints(struct fingerprint_table *table);
+extern uint32_t fp_get_model(struct fingerprint_table *table, unsigned int i);
+extern uint32_t fp_get_serial(struct fingerprint_table *table, unsigned int i);
+extern uint32_t fp_get_deviceid(struct fingerprint_table *table, unsigned int i);
+extern uint32_t fp_get_diveid(struct fingerprint_table *table, unsigned int i);
+extern char *fp_get_data(struct fingerprint_table *table, unsigned int i);
+
 #ifdef __cplusplus
 }
 #endif