cleanup: fold core/divecomputer.cpp into core/device.c

core/device.h was declaring a number of functions that were related
to divecomputers (dcs): creating a fake dc for manually entered dives
and registering / accessing dc nicknames. On could argue whether
these should be lumped together, but it is what it is.

However, part of that was implemented in C++/Qt code in a separate
core/divecomputer.cpp file. Some function therein where only
accessible to C++ and declared in core/divecomputer.h.

All in all, a big mess. Let's simply combine the files and
conditionally compile the C++-only functions depending on
the __cplusplus define.

Yes, that means turning device.c into device.cpp. A brave soul
might turn the C++/Qt code into C code if they whish later on.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

8 files changed, 200 insertions, 216 deletions

diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index fedba3614..b16f546e7 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -57,15 +57,13 @@ set(SUBSURFACE_CORE_LIB_SRCS
 	datatrak.h
 	deco.c
 	deco.h
-	device.c
+	device.cpp
 	device.h
 	devicedetails.cpp
 	devicedetails.h
 	display.h
 	dive.c
 	dive.h
-	divecomputer.cpp
-	divecomputer.h
 	divefilter.cpp
 	divefilter.h
 	divelist.c
diff --git a/core/device.c b/core/device.cpp
index 22fb7f49a..d72f4d481 100644
--- a/core/device.c
+++ b/core/device.cpp
@@ -1,9 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "ssrf.h"
-#include <string.h>
 #include "dive.h"
 #include "subsurface-string.h"
 #include "device.h"
+#include "errorhelper.h" // for verbose flag
+#include "core/settings/qPrefDiveComputer.h"
 
 /*
  * Good fake dive profiles are hard.
@@ -111,7 +112,7 @@ static void fill_samples_no_avg(struct sample *s, int max_d, int max_t, double s
 	}
 }
 
-void fake_dc(struct divecomputer *dc)
+extern "C" void fake_dc(struct divecomputer *dc)
 {
 	alloc_samples(dc, 6);
 	struct sample *fake = dc->sample;
@@ -190,12 +191,9 @@ void fake_dc(struct divecomputer *dc)
 }
 
 static void match_id(void *_dc, const char *model, uint32_t deviceid,
-		     const char *nickname, const char *serial, const char *firmware)
+		     const char *, const char *serial, const char *firmware)
 {
-	// here nickname is unused
-	UNUSED(nickname);
-
-	struct divecomputer *dc = _dc;
+	struct divecomputer *dc = (divecomputer *)_dc;
 
 	if (dc->deviceid != deviceid)
 		return;
@@ -212,10 +210,168 @@ static void match_id(void *_dc, const char *model, uint32_t deviceid,
  * When setting the device ID, we also fill in the
  * serial number and firmware version data
  */
-void set_dc_deviceid(struct divecomputer *dc, unsigned int deviceid)
+extern "C" void set_dc_deviceid(struct divecomputer *dc, unsigned int deviceid)
 {
 	if (deviceid) {
 		dc->deviceid = deviceid;
 		call_for_each_dc(dc, match_id, false);
 	}
 }
+
+DiveComputerList dcList;
+
+bool DiveComputerNode::operator==(const DiveComputerNode &a) const
+{
+	return model == a.model &&
+	       deviceId == a.deviceId &&
+	       firmware == a.firmware &&
+	       serialNumber == a.serialNumber &&
+	       nickName == a.nickName;
+}
+
+bool DiveComputerNode::operator!=(const DiveComputerNode &a) const
+{
+	return !(*this == a);
+}
+
+bool DiveComputerNode::operator<(const DiveComputerNode &a) const
+{
+	return std::tie(model, deviceId) < std::tie(a.model, a.deviceId);
+}
+
+const DiveComputerNode *DiveComputerList::getExact(const QString &m, uint32_t d)
+{
+	auto it = std::lower_bound(dcs.begin(), dcs.end(), DiveComputerNode{m, d, {}, {}, {}});
+	return it != dcs.end() && it->model == m && it->deviceId == d ? &*it : NULL;
+}
+
+const DiveComputerNode *DiveComputerList::get(const QString &m)
+{
+	auto it = std::lower_bound(dcs.begin(), dcs.end(), DiveComputerNode{m, 0, {}, {}, {}});
+	return it != dcs.end() && it->model == m ? &*it : NULL;
+}
+
+void DiveComputerNode::showchanges(const QString &n, const QString &s, const QString &f) const
+{
+	if (nickName != n && !n.isEmpty())
+		qDebug("new nickname %s for DC model %s deviceId 0x%x", qPrintable(n), qPrintable(model), deviceId);
+	if (serialNumber != s && !s.isEmpty())
+		qDebug("new serial number %s for DC model %s deviceId 0x%x", qPrintable(s), qPrintable(model), deviceId);
+	if (firmware != f && !f.isEmpty())
+		qDebug("new firmware version %s for DC model %s deviceId 0x%x", qPrintable(f), qPrintable(model), deviceId);
+}
+
+void DiveComputerList::addDC(QString m, uint32_t d, QString n, QString s, QString f)
+{
+	if (m.isEmpty() || d == 0)
+		return;
+	auto it = std::lower_bound(dcs.begin(), dcs.end(), DiveComputerNode{m, d, {}, {}, {}});
+	if (it != dcs.end() && it->model == m && it->deviceId == d) {
+		// debugging: show changes
+		if (verbose)
+			it->showchanges(n, s, f);
+		// Update any non-existent fields from the old entry
+		if (!n.isEmpty())
+			it->nickName = n;
+		if (!s.isEmpty())
+			it->serialNumber = s;
+		if (!f.isEmpty())
+			it->firmware = f;
+	} else {
+		dcs.insert(it, DiveComputerNode{m, d, s, f, n});
+	}
+}
+
+extern "C" void create_device_node(const char *model, uint32_t deviceid, const char *serial, const char *firmware, const char *nickname)
+{
+	dcList.addDC(model, deviceid, nickname, serial, firmware);
+}
+
+extern "C" void clear_device_nodes()
+{
+	dcList.dcs.clear();
+}
+
+static bool compareDCById(const DiveComputerNode &a, const DiveComputerNode &b)
+{
+	return a.deviceId < b.deviceId;
+}
+
+extern "C" void call_for_each_dc (void *f, void (*callback)(void *, const char *, uint32_t, const char *, const char *, const char *),
+				  bool select_only)
+{
+	QVector<DiveComputerNode> values = dcList.dcs;
+	std::sort(values.begin(), values.end(), compareDCById);
+	for (const DiveComputerNode &node : values) {
+		bool found = false;
+		if (select_only) {
+			int j;
+			struct dive *d;
+			for_each_dive (j, d) {
+				struct divecomputer *dc;
+				if (!d->selected)
+					continue;
+				for_each_dc (d, dc) {
+					if (dc->deviceid == node.deviceId) {
+						found = true;
+						break;
+					}
+				}
+				if (found)
+					break;
+			}
+		} else {
+			found = true;
+		}
+		if (found)
+			callback(f, qPrintable(node.model), node.deviceId, qPrintable(node.nickName),
+						 qPrintable(node.serialNumber), qPrintable(node.firmware));
+	}
+}
+
+extern "C" int is_default_dive_computer(const char *vendor, const char *product)
+{
+	return qPrefDiveComputer::vendor() == vendor && qPrefDiveComputer::product() == product;
+}
+
+extern "C" int is_default_dive_computer_device(const char *name)
+{
+	return qPrefDiveComputer::device() == name;
+}
+
+extern "C" void set_dc_nickname(struct dive *dive)
+{
+	if (!dive)
+		return;
+
+	struct divecomputer *dc;
+
+	for_each_dc (dive, dc) {
+		if (!empty_string(dc->model) && dc->deviceid &&
+		    !dcList.getExact(dc->model, dc->deviceid)) {
+			// we don't have this one, yet
+			const DiveComputerNode *existNode = dcList.get(dc->model);
+			if (existNode) {
+				// we already have this model but a different deviceid
+				QString simpleNick(dc->model);
+				if (dc->deviceid == 0)
+					simpleNick.append(" (unknown deviceid)");
+				else
+					simpleNick.append(" (").append(QString::number(dc->deviceid, 16)).append(")");
+				dcList.addDC(dc->model, dc->deviceid, simpleNick);
+			} else {
+				dcList.addDC(dc->model, dc->deviceid);
+			}
+		}
+	}
+}
+
+QString get_dc_nickname(const struct divecomputer *dc)
+{
+	const DiveComputerNode *existNode = dcList.getExact(dc->model, dc->deviceid);
+
+	if (existNode && !existNode->nickName.isEmpty())
+		return existNode->nickName;
+	else
+		return dc->model;
+}
diff --git a/core/device.h b/core/device.h
index 4c202bee5..4906a2a49 100644
--- a/core/device.h
+++ b/core/device.h
@@ -21,4 +21,37 @@ extern void clear_device_nodes();
 }
 #endif
 
+// Functions and global variables that are only available to C++ code
+#ifdef __cplusplus
+
+#include <QString>
+#include <QVector>
+class DiveComputerNode {
+public:
+	bool operator==(const DiveComputerNode &a) const;
+	bool operator!=(const DiveComputerNode &a) const;
+	bool operator<(const DiveComputerNode &a) const;
+	void showchanges(const QString &n, const QString &s, const QString &f) const;
+	QString model;
+	uint32_t deviceId;
+	QString serialNumber;
+	QString firmware;
+	QString nickName;
+};
+
+class DiveComputerList {
+public:
+	const DiveComputerNode *getExact(const QString &m, uint32_t d);
+	const DiveComputerNode *get(const QString &m);
+	void addDC(QString m, uint32_t d, QString n = QString(), QString s = QString(), QString f = QString());
+
+	// Keep the dive computers in a vector sorted by (model, deviceId)
+	QVector<DiveComputerNode> dcs;
+};
+
+QString get_dc_nickname(const struct divecomputer *dc);
+extern DiveComputerList dcList;
+
+#endif
+
 #endif // DEVICE_H
diff --git a/core/divecomputer.cpp b/core/divecomputer.cpp
deleted file mode 100644
index 5b4067b82..000000000
--- a/core/divecomputer.cpp
+++ /dev/null
@@ -1,164 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include "divecomputer.h"
-#include "dive.h"
-#include "errorhelper.h"
-#include "core/settings/qPrefDiveComputer.h"
-#include "subsurface-string.h"
-
-DiveComputerList dcList;
-
-bool DiveComputerNode::operator==(const DiveComputerNode &a) const
-{
-	return model == a.model &&
-	       deviceId == a.deviceId &&
-	       firmware == a.firmware &&
-	       serialNumber == a.serialNumber &&
-	       nickName == a.nickName;
-}
-
-bool DiveComputerNode::operator!=(const DiveComputerNode &a) const
-{
-	return !(*this == a);
-}
-
-bool DiveComputerNode::operator<(const DiveComputerNode &a) const
-{
-	return std::tie(model, deviceId) < std::tie(a.model, a.deviceId);
-}
-
-const DiveComputerNode *DiveComputerList::getExact(const QString &m, uint32_t d)
-{
-	auto it = std::lower_bound(dcs.begin(), dcs.end(), DiveComputerNode{m, d, {}, {}, {}});
-	return it != dcs.end() && it->model == m && it->deviceId == d ? &*it : NULL;
-}
-
-const DiveComputerNode *DiveComputerList::get(const QString &m)
-{
-	auto it = std::lower_bound(dcs.begin(), dcs.end(), DiveComputerNode{m, 0, {}, {}, {}});
-	return it != dcs.end() && it->model == m ? &*it : NULL;
-}
-
-void DiveComputerNode::showchanges(const QString &n, const QString &s, const QString &f) const
-{
-	if (nickName != n && !n.isEmpty())
-		qDebug("new nickname %s for DC model %s deviceId 0x%x", qPrintable(n), qPrintable(model), deviceId);
-	if (serialNumber != s && !s.isEmpty())
-		qDebug("new serial number %s for DC model %s deviceId 0x%x", qPrintable(s), qPrintable(model), deviceId);
-	if (firmware != f && !f.isEmpty())
-		qDebug("new firmware version %s for DC model %s deviceId 0x%x", qPrintable(f), qPrintable(model), deviceId);
-}
-
-void DiveComputerList::addDC(QString m, uint32_t d, QString n, QString s, QString f)
-{
-	if (m.isEmpty() || d == 0)
-		return;
-	auto it = std::lower_bound(dcs.begin(), dcs.end(), DiveComputerNode{m, d, {}, {}, {}});
-	if (it != dcs.end() && it->model == m && it->deviceId == d) {
-		// debugging: show changes
-		if (verbose)
-			it->showchanges(n, s, f);
-		// Update any non-existent fields from the old entry
-		if (!n.isEmpty())
-			it->nickName = n;
-		if (!s.isEmpty())
-			it->serialNumber = s;
-		if (!f.isEmpty())
-			it->firmware = f;
-	} else {
-		dcs.insert(it, DiveComputerNode{m, d, s, f, n});
-	}
-}
-
-extern "C" void create_device_node(const char *model, uint32_t deviceid, const char *serial, const char *firmware, const char *nickname)
-{
-	dcList.addDC(model, deviceid, nickname, serial, firmware);
-}
-
-extern "C" void clear_device_nodes()
-{
-	dcList.dcs.clear();
-}
-
-static bool compareDCById(const DiveComputerNode &a, const DiveComputerNode &b)
-{
-	return a.deviceId < b.deviceId;
-}
-
-extern "C" void call_for_each_dc (void *f, void (*callback)(void *, const char *, uint32_t, const char *, const char *, const char *),
-				 bool select_only)
-{
-	QVector<DiveComputerNode> values = dcList.dcs;
-	std::sort(values.begin(), values.end(), compareDCById);
-	for (const DiveComputerNode &node : values) {
-		bool found = false;
-		if (select_only) {
-			int j;
-			struct dive *d;
-			for_each_dive (j, d) {
-				struct divecomputer *dc;
-				if (!d->selected)
-					continue;
-				for_each_dc (d, dc) {
-					if (dc->deviceid == node.deviceId) {
-						found = true;
-						break;
-					}
-				}
-				if (found)
-					break;
-			}
-		} else {
-			found = true;
-		}
-		if (found)
-			callback(f, qPrintable(node.model), node.deviceId, qPrintable(node.nickName),
-						 qPrintable(node.serialNumber), qPrintable(node.firmware));
-	}
-}
-
-extern "C" int is_default_dive_computer(const char *vendor, const char *product)
-{
-	return qPrefDiveComputer::vendor() == vendor && qPrefDiveComputer::product() == product;
-}
-
-extern "C" int is_default_dive_computer_device(const char *name)
-{
-	return qPrefDiveComputer::device() == name;
-}
-
-extern "C" void set_dc_nickname(struct dive *dive)
-{
-	if (!dive)
-		return;
-
-	struct divecomputer *dc;
-
-	for_each_dc (dive, dc) {
-		if (!empty_string(dc->model) && dc->deviceid &&
-		    !dcList.getExact(dc->model, dc->deviceid)) {
-			// we don't have this one, yet
-			const DiveComputerNode *existNode = dcList.get(dc->model);
-			if (existNode) {
-				// we already have this model but a different deviceid
-				QString simpleNick(dc->model);
-				if (dc->deviceid == 0)
-					simpleNick.append(" (unknown deviceid)");
-				else
-					simpleNick.append(" (").append(QString::number(dc->deviceid, 16)).append(")");
-				dcList.addDC(dc->model, dc->deviceid, simpleNick);
-			} else {
-				dcList.addDC(dc->model, dc->deviceid);
-			}
-		}
-	}
-}
-
-QString get_dc_nickname(const struct divecomputer *dc)
-{
-	const DiveComputerNode *existNode = dcList.getExact(dc->model, dc->deviceid);
-
-	if (existNode && !existNode->nickName.isEmpty())
-		return existNode->nickName;
-	else
-		return dc->model;
-}
diff --git a/core/divecomputer.h b/core/divecomputer.h
deleted file mode 100644
index c92d56558..000000000
--- a/core/divecomputer.h
+++ /dev/null
@@ -1,35 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#ifndef DIVECOMPUTER_H
-#define DIVECOMPUTER_H
-
-#include <QString>
-#include <QVector>
-#include <stdint.h>
-
-class DiveComputerNode {
-public:
-	bool operator==(const DiveComputerNode &a) const;
-	bool operator!=(const DiveComputerNode &a) const;
-	bool operator<(const DiveComputerNode &a) const;
-	void showchanges(const QString &n, const QString &s, const QString &f) const;
-	QString model;
-	uint32_t deviceId;
-	QString serialNumber;
-	QString firmware;
-	QString nickName;
-};
-
-class DiveComputerList {
-public:
-	const DiveComputerNode *getExact(const QString &m, uint32_t d);
-	const DiveComputerNode *get(const QString &m);
-	void addDC(QString m, uint32_t d, QString n = QString(), QString s = QString(), QString f = QString());
-
-	// Keep the dive computers in a vector sorted by (model, deviceId)
-	QVector<DiveComputerNode> dcs;
-};
-
-QString get_dc_nickname(const struct divecomputer *dc);
-extern DiveComputerList dcList;
-
-#endif
diff --git a/packaging/ios/Subsurface-mobile.pro b/packaging/ios/Subsurface-mobile.pro
index 1281d0377..322e2b9a2 100644
--- a/packaging/ios/Subsurface-mobile.pro
+++ b/packaging/ios/Subsurface-mobile.pro
@@ -36,7 +36,6 @@ SOURCES += ../../subsurface-mobile-main.cpp \
 	../../core/checkcloudconnection.cpp \
 	../../core/color.cpp \
 	../../core/configuredivecomputer.cpp \
-	../../core/divecomputer.cpp \
 	../../core/divelogexportlogic.cpp \
 	../../core/divesitehelpers.cpp \
 	../../core/errorhelper.c \
@@ -52,7 +51,7 @@ SOURCES += ../../subsurface-mobile-main.cpp \
 	../../core/subsurfacestartup.c \
 	../../core/ios.cpp \
 	../../core/profile.c \
-	../../core/device.c \
+	../../core/device.cpp \
 	../../core/dive.c \
 	../../core/divefilter.cpp \
 	../../core/divelist.c \
@@ -217,7 +216,6 @@ HEADERS += \
 	../../core/datatrak.h \
 	../../core/deco.h \
 	../../core/display.h \
-	../../core/divecomputer.h \
 	../../core/divefilter.h \
 	../../core/divelist.h \
 	../../core/divelogexportlogic.h \
@@ -232,7 +230,6 @@ HEADERS += \
 	../../core/metrics.h \
 	../../core/qt-gui.h \
 	../../core/selection.h \
-	../../core/divecomputer.h \
 	../../core/sha1.h \
 	../../core/strndup.h \
 	../../core/subsurfacestartup.h \
diff --git a/profile-widget/profilewidget2.cpp b/profile-widget/profilewidget2.cpp
index 3373b96cd..f3a636fe8 100644
--- a/profile-widget/profilewidget2.cpp
+++ b/profile-widget/profilewidget2.cpp
@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "profile-widget/profilewidget2.h"
 #include "qt-models/diveplotdatamodel.h"
-#include "core/divecomputer.h"
 #include "core/subsurface-string.h"
 #include "core/qthelper.h"
 #include "core/picture.h"
diff --git a/qt-models/divecomputermodel.h b/qt-models/divecomputermodel.h
index f1e3a0a38..8c2373695 100644
--- a/qt-models/divecomputermodel.h
+++ b/qt-models/divecomputermodel.h
@@ -3,7 +3,7 @@
 #define DIVECOMPUTERMODEL_H
 
 #include "qt-models/cleanertablemodel.h"
-#include "core/divecomputer.h"
+#include "core/device.h"
 
 class DiveComputerModel : public CleanerTableModel {
 	Q_OBJECT