cleanup: break out event-related code into event.[c|h]

In an effort to reduce the size of dive.h and dive.c, break out
the event related functions. Moreover event-names were handled
by the profile-code, collect that also in the new source files.

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

18 files changed, 226 insertions, 179 deletions

diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index 079d1a1fe..08fca0864 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -77,6 +77,8 @@ set(SUBSURFACE_CORE_LIB_SRCS
 	divesitehelpers.h
 	downloadfromdcthread.cpp
 	downloadfromdcthread.h
+	event.c
+	event.h
 	equipment.c
 	equipment.h
 	errorhelper.c
diff --git a/core/dive.c b/core/dive.c
index f25864905..a9c69a3b0 100644
--- a/core/dive.c
+++ b/core/dive.c
@@ -13,6 +13,7 @@
 #include "divelist.h"
 #include "divesite.h"
 #include "errorhelper.h"
+#include "event.h"
 #include "qthelper.h"
 #include "membuffer.h"
 #include "picture.h"
@@ -21,7 +22,6 @@
 #include "structured_list.h"
 #include "fulltext.h"
 
-
 /* one could argue about the best place to have this variable -
  * it's used in the UI, but it seems to make the most sense to have it
  * here */
@@ -123,58 +123,6 @@ int legacy_format_o2pressures(const struct dive *dive, const struct divecomputer
 	return o2sensor < 0 ? 256 : o2sensor;
 }
 
-int event_is_gaschange(const struct event *ev)
-{
-	return ev->type == SAMPLE_EVENT_GASCHANGE ||
-		ev->type == SAMPLE_EVENT_GASCHANGE2;
-}
-
-bool event_is_divemodechange(const struct event *ev)
-{
-	return same_string(ev->name, "modechange");
-}
-
-struct event *create_event(unsigned int time, int type, int flags, int value, const char *name)
-{
-	int gas_index = -1;
-	struct event *ev;
-	unsigned int size, len = strlen(name);
-
-	size = sizeof(*ev) + len + 1;
-	ev = malloc(size);
-	if (!ev)
-		return NULL;
-	memset(ev, 0, size);
-	memcpy(ev->name, name, len);
-	ev->time.seconds = time;
-	ev->type = type;
-	ev->flags = flags;
-	ev->value = value;
-
-	/*
-	 * Expand the events into a sane format. Currently
-	 * just gas switches
-	 */
-	switch (type) {
-	case SAMPLE_EVENT_GASCHANGE2:
-		/* High 16 bits are He percentage */
-		ev->gas.mix.he.permille = (value >> 16) * 10;
-
-		/* Extension to the GASCHANGE2 format: cylinder index in 'flags' */
-		/* TODO: verify that gas_index < num_cylinders. */
-		if (flags > 0)
-			gas_index = flags-1;
-	/* Fallthrough */
-	case SAMPLE_EVENT_GASCHANGE:
-		/* Low 16 bits are O2 percentage */
-		ev->gas.mix.o2.permille = (value & 0xffff) * 10;
-		ev->gas.index = gas_index;
-		break;
-	}
-
-	return ev;
-}
-
 /* warning: does not test idx for validity */
 struct event *create_gas_switch_event(struct dive *dive, struct divecomputer *dc, int seconds, int idx)
 {
@@ -195,11 +143,6 @@ struct event *create_gas_switch_event(struct dive *dive, struct divecomputer *dc
 	return ev;
 }
 
-struct event *clone_event_rename(const struct event *ev, const char *name)
-{
-	return create_event(ev->time.seconds, ev->type, ev->flags, ev->value, name);
-}
-
 void add_event_to_dc(struct divecomputer *dc, struct event *ev)
 {
 	struct event **p;
@@ -253,19 +196,6 @@ void swap_event(struct divecomputer *dc, struct event *from, struct event *to)
 	}
 }
 
-bool same_event(const struct event *a, const struct event *b)
-{
-	if (a->time.seconds != b->time.seconds)
-		return 0;
-	if (a->type != b->type)
-		return 0;
-	if (a->flags != b->flags)
-		return 0;
-	if (a->value != b->value)
-		return 0;
-	return !strcmp(a->name, b->name);
-}
-
 /* Remove given event from dive computer. Does *not* free the event. */
 void remove_event_from_dc(struct divecomputer *dc, struct event *event)
 {
@@ -546,22 +476,6 @@ void selective_copy_dive(const struct dive *s, struct dive *d, struct dive_compo
 }
 #undef CONDITIONAL_COPY_STRING
 
-struct event *clone_event(const struct event *src_ev)
-{
-	struct event *ev;
-	if (!src_ev)
-		return NULL;
-
-	size_t size = sizeof(*src_ev) + strlen(src_ev->name) + 1;
-	ev = (struct event*) malloc(size);
-	if (!ev)
-		exit(1);
-	memcpy(ev, src_ev, size);
-	ev->next = NULL;
-
-	return ev;
-}
-
 /* copies all events in this dive computer */
 void copy_events(const struct divecomputer *s, struct divecomputer *d)
 {
@@ -2811,15 +2725,6 @@ struct dive *try_to_merge(struct dive *a, struct dive *b, bool prefer_downloaded
 	return res;
 }
 
-void free_events(struct event *ev)
-{
-	while (ev) {
-		struct event *next = ev->next;
-		free(ev);
-		ev = next;
-	}
-}
-
 static void free_extra_data(struct extra_data *ed)
 {
 	free((void *)ed->key);
diff --git a/core/dive.h b/core/dive.h
index 735e760c1..27e73375f 100644
--- a/core/dive.h
+++ b/core/dive.h
@@ -20,41 +20,14 @@
 extern "C" {
 #endif
 
+struct event;
+
 extern int last_xml_version;
 
 extern const char *cylinderuse_text[NUM_GAS_USE];
 extern const char *divemode_text_ui[];
 extern const char *divemode_text[];
 
-/*
- * Events are currently based straight on what libdivecomputer gives us.
- *  We need to wrap these into our own events at some point to remove some of the limitations.
- */
-struct event {
-	struct event *next;
-	duration_t time;
-	int type;
-	/* This is the annoying libdivecomputer format. */
-	int flags, value;
-	/* .. and this is our "extended" data for some event types */
-	union {
-		enum divemode_t divemode; // for divemode change events
-		/*
-		 * NOTE! The index may be -1, which means "unknown". In that
-		 * case, the get_cylinder_index() function will give the best
-		 * match with the cylinders in the dive based on gasmix.
-		 */
-		struct { // for gas switch events
-			int index;
-			struct gasmix mix;
-		} gas;
-	};
-	bool deleted;
-	char name[];
-};
-
-extern int event_is_gaschange(const struct event *ev);
-
 extern void fill_pressures(struct gas_pressures *pressures, const double amb_pressure, struct gasmix mix, double po2, enum divemode_t dctype);
 
 /* Linear interpolation between 'a' and 'b', when we are 'part'way into the 'whole' distance from a to b */
@@ -323,21 +296,16 @@ extern int split_dive(const struct dive *dive, struct dive **new1, struct dive *
 extern int split_dive_at_time(const struct dive *dive, duration_t time, struct dive **new1, struct dive **new2);
 extern struct dive *merge_dives(const struct dive *a, const struct dive *b, int offset, bool prefer_downloaded, struct dive_trip **trip, struct dive_site **site);
 extern struct dive *try_to_merge(struct dive *a, struct dive *b, bool prefer_downloaded);
-extern struct event *clone_event(const struct event *src_ev);
 extern void copy_events(const struct divecomputer *s, struct divecomputer *d);
 extern void copy_events_until(const struct dive *sd, struct dive *dd, int time);
-extern void free_events(struct event *ev);
 extern void copy_used_cylinders(const struct dive *s, struct dive *d, bool used_only);
 extern void copy_samples(const struct divecomputer *s, struct divecomputer *d);
 extern bool is_cylinder_used(const struct dive *dive, int idx);
 extern bool is_cylinder_prot(const struct dive *dive, int idx);
 extern void add_gas_switch_event(struct dive *dive, struct divecomputer *dc, int time, int idx);
-extern struct event *create_event(unsigned int time, int type, int flags, int value, const char *name);
 extern struct event *create_gas_switch_event(struct dive *dive, struct divecomputer *dc, int seconds, int idx);
-extern struct event *clone_event_rename(const struct event *ev, const char *name);
 extern void add_event_to_dc(struct divecomputer *dc, struct event *ev);
 extern void swap_event(struct divecomputer *dc, struct event *from, struct event *to);
-extern bool same_event(const struct event *a, const struct event *b);
 extern struct event *add_event(struct divecomputer *dc, unsigned int time, int type, int flags, int value, const char *name);
 extern void remove_event_from_dc(struct divecomputer *dc, struct event *event);
 extern void update_event_name(struct dive *d, struct event *event, const char *name);
@@ -350,11 +318,8 @@ extern int nr_weightsystems(const struct dive *dive);
 
 /* UI related protopypes */
 
-extern void remember_event(const char *eventname);
 extern void invalidate_dive_cache(struct dive *dc);
 
-extern void clear_events(void);
-
 extern void set_autogroup(bool value);
 extern int total_weight(const struct dive *);
 
@@ -370,10 +335,6 @@ extern void subsurface_command_line_exit(int *, char ***);
 extern bool is_dc_planner(const struct divecomputer *dc);
 extern bool has_planned(const struct dive *dive, bool planned);
 
-/* Since C doesn't have parameter-based overloading, two versions of get_next_event. */
-extern const struct event *get_next_event(const struct event *event, const char *name);
-extern struct event *get_next_event_mutable(struct event *event, const char *name);
-
 /* Get gasmixes at increasing timestamps.
  * In "evp", pass a pointer to a "struct event *" which is NULL-initialized on first invocation.
  * On subsequent calls, pass the same "evp" and the "gasmix" from previous calls.
diff --git a/core/divelist.c b/core/divelist.c
index 3599ec498..7f93bacf2 100644
--- a/core/divelist.c
+++ b/core/divelist.c
@@ -7,6 +7,7 @@
 #include "device.h"
 #include "divesite.h"
 #include "dive.h"
+#include "event.h"
 #include "filterpreset.h"
 #include "fulltext.h"
 #include "planner.h"
diff --git a/core/event.c b/core/event.c
new file mode 100644
index 000000000..8f73aefd8
--- /dev/null
+++ b/core/event.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "event.h"
+#include "subsurface-string.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+int event_is_gaschange(const struct event *ev)
+{
+	return ev->type == SAMPLE_EVENT_GASCHANGE ||
+		ev->type == SAMPLE_EVENT_GASCHANGE2;
+}
+
+bool event_is_divemodechange(const struct event *ev)
+{
+	return same_string(ev->name, "modechange");
+}
+
+struct event *clone_event(const struct event *src_ev)
+{
+	struct event *ev;
+	if (!src_ev)
+		return NULL;
+
+	size_t size = sizeof(*src_ev) + strlen(src_ev->name) + 1;
+	ev = (struct event*) malloc(size);
+	if (!ev)
+		exit(1);
+	memcpy(ev, src_ev, size);
+	ev->next = NULL;
+
+	return ev;
+}
+
+void free_events(struct event *ev)
+{
+	while (ev) {
+		struct event *next = ev->next;
+		free(ev);
+		ev = next;
+	}
+}
+
+struct event *create_event(unsigned int time, int type, int flags, int value, const char *name)
+{
+	int gas_index = -1;
+	struct event *ev;
+	unsigned int size, len = strlen(name);
+
+	size = sizeof(*ev) + len + 1;
+	ev = malloc(size);
+	if (!ev)
+		return NULL;
+	memset(ev, 0, size);
+	memcpy(ev->name, name, len);
+	ev->time.seconds = time;
+	ev->type = type;
+	ev->flags = flags;
+	ev->value = value;
+
+	/*
+	 * Expand the events into a sane format. Currently
+	 * just gas switches
+	 */
+	switch (type) {
+	case SAMPLE_EVENT_GASCHANGE2:
+		/* High 16 bits are He percentage */
+		ev->gas.mix.he.permille = (value >> 16) * 10;
+
+		/* Extension to the GASCHANGE2 format: cylinder index in 'flags' */
+		/* TODO: verify that gas_index < num_cylinders. */
+		if (flags > 0)
+			gas_index = flags-1;
+	/* Fallthrough */
+	case SAMPLE_EVENT_GASCHANGE:
+		/* Low 16 bits are O2 percentage */
+		ev->gas.mix.o2.permille = (value & 0xffff) * 10;
+		ev->gas.index = gas_index;
+		break;
+	}
+
+	return ev;
+}
+
+struct event *clone_event_rename(const struct event *ev, const char *name)
+{
+	return create_event(ev->time.seconds, ev->type, ev->flags, ev->value, name);
+}
+
+bool same_event(const struct event *a, const struct event *b)
+{
+	if (a->time.seconds != b->time.seconds)
+		return 0;
+	if (a->type != b->type)
+		return 0;
+	if (a->flags != b->flags)
+		return 0;
+	if (a->value != b->value)
+		return 0;
+	return !strcmp(a->name, b->name);
+}
+
+/* collect all event names and whether we display them */
+struct ev_select *ev_namelist = NULL;
+int evn_used = 0;
+static int evn_allocated = 0;
+
+void clear_events(void)
+{
+	for (int i = 0; i < evn_used; i++)
+		free(ev_namelist[i].ev_name);
+	evn_used = 0;
+}
+
+void remember_event(const char *eventname)
+{
+	int i = 0, len;
+
+	if (!eventname || (len = strlen(eventname)) == 0)
+		return;
+	while (i < evn_used) {
+		if (!strncmp(eventname, ev_namelist[i].ev_name, len))
+			return;
+		i++;
+	}
+	if (evn_used == evn_allocated) {
+		evn_allocated += 10;
+		ev_namelist = realloc(ev_namelist, evn_allocated * sizeof(struct ev_select));
+		if (!ev_namelist)
+			/* we are screwed, but let's just bail out */
+			return;
+	}
+	ev_namelist[evn_used].ev_name = strdup(eventname);
+	ev_namelist[evn_used].plot_ev = true;
+	evn_used++;
+}
diff --git a/core/event.h b/core/event.h
new file mode 100644
index 000000000..4c729e3f3
--- /dev/null
+++ b/core/event.h
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef EVENT_H
+#define EVENT_H
+
+#include "divemode.h"
+#include "gas.h"
+#include "units.h"
+
+#include <libdivecomputer/parser.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Events are currently based straight on what libdivecomputer gives us.
+ *  We need to wrap these into our own events at some point to remove some of the limitations.
+ */
+struct event {
+	struct event *next;
+	duration_t time;
+	int type;
+	/* This is the annoying libdivecomputer format. */
+	int flags, value;
+	/* .. and this is our "extended" data for some event types */
+	union {
+		enum divemode_t divemode; // for divemode change events
+		/*
+		 * NOTE! The index may be -1, which means "unknown". In that
+		 * case, the get_cylinder_index() function will give the best
+		 * match with the cylinders in the dive based on gasmix.
+		 */
+		struct { // for gas switch events
+			int index;
+			struct gasmix mix;
+		} gas;
+	};
+	bool deleted;
+	char name[];
+};
+
+struct ev_select {
+	char *ev_name;
+	bool plot_ev;
+};
+
+/* collect all event names and whether we display them */
+extern struct ev_select *ev_namelist;
+extern int evn_used;
+
+extern int event_is_gaschange(const struct event *ev);
+extern bool event_is_divemodechange(const struct event *ev);
+extern struct event *clone_event(const struct event *src_ev);
+extern void free_events(struct event *ev);
+extern struct event *create_event(unsigned int time, int type, int flags, int value, const char *name);
+extern struct event *clone_event_rename(const struct event *ev, const char *name);
+extern bool same_event(const struct event *a, const struct event *b);
+extern void remember_event(const char *eventname);
+extern void clear_events(void);
+
+/* Since C doesn't have parameter-based overloading, two versions of get_next_event. */
+extern const struct event *get_next_event(const struct event *event, const char *name);
+extern struct event *get_next_event_mutable(struct event *event, const char *name);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/core/gaspressures.c b/core/gaspressures.c
index bf329add4..2fa85368c 100644
--- a/core/gaspressures.c
+++ b/core/gaspressures.c
@@ -20,6 +20,7 @@
 
 #include "ssrf.h"
 #include "dive.h"
+#include "event.h"
 #include "display.h"
 #include "profile.h"
 #include "gaspressures.h"
diff --git a/core/import-cobalt.c b/core/import-cobalt.c
index 22bf14dbb..7feb325f1 100644
--- a/core/import-cobalt.c
+++ b/core/import-cobalt.c
@@ -6,6 +6,7 @@
 
 #include "ssrf.h"
 #include "divesite.h"
+#include "gas.h"
 #include "subsurface-string.h"
 #include "parse.h"
 #include "divelist.h"
diff --git a/core/libdivecomputer.c b/core/libdivecomputer.c
index f9551decd..b7d6ab14e 100644
--- a/core/libdivecomputer.c
+++ b/core/libdivecomputer.c
@@ -19,6 +19,7 @@
 #include "dive.h"
 #include "display.h"
 #include "errorhelper.h"
+#include "event.h"
 #include "sha1.h"
 #include "subsurface-time.h"
 #include "timer.h"
diff --git a/core/load-git.c b/core/load-git.c
index 2f2da1efb..839c5019b 100644
--- a/core/load-git.c
+++ b/core/load-git.c
@@ -16,6 +16,7 @@
 
 #include "dive.h"
 #include "divesite.h"
+#include "event.h"
 #include "errorhelper.h"
 #include "trip.h"
 #include "subsurface-string.h"
diff --git a/core/parse.h b/core/parse.h
index 7c4529739..224403585 100644
--- a/core/parse.h
+++ b/core/parse.h
@@ -4,7 +4,9 @@
 
 #define MAX_EVENT_NAME 128
 
-#include "dive.h" // for struct event!
+#include "event.h"
+#include "picture.h"
+#include "dive.h" // for "struct extra_data"
 #include "filterpreset.h"
 
 #include <sqlite3.h>
diff --git a/core/planner.c b/core/planner.c
index 475be1a20..f03b87f9a 100644
--- a/core/planner.c
+++ b/core/planner.c
@@ -15,6 +15,7 @@
 #include "subsurface-string.h"
 #include "deco.h"
 #include "errorhelper.h"
+#include "event.h"
 #include "planner.h"
 #include "subsurface-time.h"
 #include "gettext.h"
diff --git a/core/profile.c b/core/profile.c
index 1cc73f158..0e7db76d2 100644
--- a/core/profile.c
+++ b/core/profile.c
@@ -9,9 +9,10 @@
 #include <assert.h>
 
 #include "dive.h"
-#include "subsurface-string.h"
 #include "display.h"
 #include "divelist.h"
+#include "event.h"
+#include "subsurface-string.h"
 
 #include "profile.h"
 #include "gaspressures.h"
@@ -115,41 +116,6 @@ int get_maxdepth(const struct plot_info *pi)
 	return md;
 }
 
-/* collect all event names and whether we display them */
-struct ev_select *ev_namelist;
-int evn_allocated;
-int evn_used;
-
-void clear_events(void)
-{
-	for (int i = 0; i < evn_used; i++)
-		free(ev_namelist[i].ev_name);
-	evn_used = 0;
-}
-
-void remember_event(const char *eventname)
-{
-	int i = 0, len;
-
-	if (!eventname || (len = strlen(eventname)) == 0)
-		return;
-	while (i < evn_used) {
-		if (!strncmp(eventname, ev_namelist[i].ev_name, len))
-			return;
-		i++;
-	}
-	if (evn_used == evn_allocated) {
-		evn_allocated += 10;
-		ev_namelist = realloc(ev_namelist, evn_allocated * sizeof(struct ev_select));
-		if (!ev_namelist)
-			/* we are screwed, but let's just bail out */
-			return;
-	}
-	ev_namelist[evn_used].ev_name = strdup(eventname);
-	ev_namelist[evn_used].plot_ev = true;
-	evn_used++;
-}
-
 /* UNUSED! */
 static int get_local_sac(struct plot_info *pi, int idx1, int idx2, struct dive *dive) __attribute__((unused));
 
diff --git a/core/profile.h b/core/profile.h
index 96b672187..7158861bd 100644
--- a/core/profile.h
+++ b/core/profile.h
@@ -80,11 +80,6 @@ struct plot_data {
 	bool icd_warning;
 };
 
-struct ev_select {
-	char *ev_name;
-	bool plot_ev;
-};
-
 extern void compare_samples(struct plot_info *p1, int idx1, int idx2, char *buf, int bufsize, bool sum);
 extern void init_plot_info(struct plot_info *pi);
 extern void create_plot_info_new(struct dive *dive, struct divecomputer *dc, struct plot_info *pi, bool fast, const struct deco_state *planner_ds);
diff --git a/core/save-git.c b/core/save-git.c
index 041f01223..4fabe35cf 100644
--- a/core/save-git.c
+++ b/core/save-git.c
@@ -24,6 +24,7 @@
 #include "trip.h"
 #include "device.h"
 #include "errorhelper.h"
+#include "event.h"
 #include "membuffer.h"
 #include "git-access.h"
 #include "version.h"
diff --git a/core/save-html.c b/core/save-html.c
index ec348e56d..65b21a723 100644
--- a/core/save-html.c
+++ b/core/save-html.c
@@ -10,6 +10,7 @@
 #include "gettext.h"
 #include "divesite.h"
 #include "errorhelper.h"
+#include "event.h"
 #include "file.h"
 #include "picture.h"
 #include "tag.h"
diff --git a/core/save-xml.c b/core/save-xml.c
index 812201e48..13d038c22 100644
--- a/core/save-xml.c
+++ b/core/save-xml.c
@@ -21,6 +21,7 @@
 #include "subsurface-time.h"
 #include "trip.h"
 #include "device.h"
+#include "event.h"
 #include "file.h"
 #include "membuffer.h"
 #include "picture.h"
diff --git a/core/statistics.c b/core/statistics.c
index 8ebd4a4e0..d22b6755c 100644
--- a/core/statistics.c
+++ b/core/statistics.c
@@ -12,6 +12,7 @@
 
 #include "dive.h"
 #include "display.h"
+#include "event.h"
 #include "subsurface-time.h"
 #include "trip.h"
 #include "statistics.h"