Cleanup: move unit-related functions to own translation unit

Create a units.c translation unit.

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

6 files changed, 191 insertions, 186 deletions

diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index 6a0a1ad40..5121222cc 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -156,6 +156,7 @@ set(SUBSURFACE_CORE_LIB_SRCS
 	uemis.c
 	uemis.h
 	units.h
+	units.c
 	version.c
 	version.h
 	videoframeextractor.cpp
diff --git a/core/dive.c b/core/dive.c
index b64d2654e..2d82f5565 100644
--- a/core/dive.c
+++ b/core/dive.c
@@ -273,177 +273,6 @@ struct gasmix get_gasmix_from_event(const struct dive *dive, const struct event
 	return dummy;
 }
 
-int get_pressure_units(int mb, const char **units)
-{
-	int pressure;
-	const char *unit;
-	const struct units *units_p = get_units();
-
-	switch (units_p->pressure) {
-	case PASCAL:
-		pressure = mb * 100;
-		unit = translate("gettextFromC", "pascal");
-		break;
-	case BAR:
-	default:
-		pressure = (mb + 500) / 1000;
-		unit = translate("gettextFromC", "bar");
-		break;
-	case PSI:
-		pressure = mbar_to_PSI(mb);
-		unit = translate("gettextFromC", "psi");
-		break;
-	}
-	if (units)
-		*units = unit;
-	return pressure;
-}
-
-double get_temp_units(unsigned int mk, const char **units)
-{
-	double deg;
-	const char *unit;
-	const struct units *units_p = get_units();
-
-	if (units_p->temperature == FAHRENHEIT) {
-		deg = mkelvin_to_F(mk);
-		unit = "°F";
-	} else {
-		deg = mkelvin_to_C(mk);
-		unit = "°C";
-	}
-	if (units)
-		*units = unit;
-	return deg;
-}
-
-double get_volume_units(unsigned int ml, int *frac, const char **units)
-{
-	int decimals;
-	double vol;
-	const char *unit;
-	const struct units *units_p = get_units();
-
-	switch (units_p->volume) {
-	case LITER:
-	default:
-		vol = ml / 1000.0;
-		unit = translate("gettextFromC", "ℓ");
-		decimals = 1;
-		break;
-	case CUFT:
-		vol = ml_to_cuft(ml);
-		unit = translate("gettextFromC", "cuft");
-		decimals = 2;
-		break;
-	}
-	if (frac)
-		*frac = decimals;
-	if (units)
-		*units = unit;
-	return vol;
-}
-
-int units_to_sac(double volume)
-{
-	if (get_units()->volume == CUFT)
-		return lrint(cuft_to_l(volume) * 1000.0);
-	else
-		return lrint(volume * 1000);
-}
-
-depth_t units_to_depth(double depth)
-{
-	depth_t internaldepth;
-	if (get_units()->length == METERS) {
-		internaldepth.mm = lrint(depth * 1000);
-	} else {
-		internaldepth.mm = feet_to_mm(depth);
-	}
-	return internaldepth;
-}
-
-double get_depth_units(int mm, int *frac, const char **units)
-{
-	int decimals;
-	double d;
-	const char *unit;
-	const struct units *units_p = get_units();
-
-	switch (units_p->length) {
-	case METERS:
-	default:
-		d = mm / 1000.0;
-		unit = translate("gettextFromC", "m");
-		decimals = d < 20;
-		break;
-	case FEET:
-		d = mm_to_feet(mm);
-		unit = translate("gettextFromC", "ft");
-		decimals = 0;
-		break;
-	}
-	if (frac)
-		*frac = decimals;
-	if (units)
-		*units = unit;
-	return d;
-}
-
-double get_vertical_speed_units(unsigned int mms, int *frac, const char **units)
-{
-	double d;
-	const char *unit;
-	const struct units *units_p = get_units();
-	const double time_factor = units_p->vertical_speed_time == MINUTES ? 60.0 : 1.0;
-
-	switch (units_p->length) {
-	case METERS:
-	default:
-		d = mms / 1000.0 * time_factor;
-		if (units_p->vertical_speed_time == MINUTES)
-			unit = translate("gettextFromC", "m/min");
-		else
-			unit = translate("gettextFromC", "m/s");
-		break;
-	case FEET:
-		d = mm_to_feet(mms) * time_factor;
-		if (units_p->vertical_speed_time == MINUTES)
-			unit = translate("gettextFromC", "ft/min");
-		else
-			unit = translate("gettextFromC", "ft/s");
-		break;
-	}
-	if (frac)
-		*frac = d < 10;
-	if (units)
-		*units = unit;
-	return d;
-}
-
-double get_weight_units(unsigned int grams, int *frac, const char **units)
-{
-	int decimals;
-	double value;
-	const char *unit;
-	const struct units *units_p = get_units();
-
-	if (units_p->weight == LBS) {
-		value = grams_to_lbs(grams);
-		unit = translate("gettextFromC", "lbs");
-		decimals = 0;
-	} else {
-		value = grams / 1000.0;
-		unit = translate("gettextFromC", "kg");
-		decimals = 1;
-	}
-	if (frac)
-		*frac = decimals;
-	if (units)
-		*units = unit;
-	return value;
-}
-
 // we need this to be uniq. oh, and it has no meaning whatsoever
 // - that's why we have the silly initial number and increment by 3 :-)
 int dive_getUniqID()
diff --git a/core/dive.h b/core/dive.h
index 6fd78d2dc..093046cf4 100644
--- a/core/dive.h
+++ b/core/dive.h
@@ -63,16 +63,6 @@ struct event {
 
 extern int event_is_gaschange(const struct event *ev);
 
-extern int get_pressure_units(int mb, const char **units);
-extern double get_depth_units(int mm, int *frac, const char **units);
-extern double get_volume_units(unsigned int ml, int *frac, const char **units);
-extern double get_temp_units(unsigned int mk, const char **units);
-extern double get_weight_units(unsigned int grams, int *frac, const char **units);
-extern double get_vertical_speed_units(unsigned int mms, int *frac, const char **units);
-
-extern depth_t units_to_depth(double depth);
-extern int units_to_sac(double volume);
-
 /* Volume in mliter of a cylinder at pressure 'p' */
 extern int gas_volume(const cylinder_t *cyl, pressure_t p);
 extern double gas_compressibility_factor(struct gasmix gas, double bar);
@@ -294,9 +284,6 @@ extern bool autogroup;
 struct dive *unregister_dive(int idx);
 extern void delete_single_dive(int idx);
 
-extern const struct units SI_units, IMPERIAL_units;
-
-extern const struct units *get_units(void);
 extern int run_survey, verbose, quit, force_root;
 
 extern struct dive_table dive_table;
diff --git a/core/units.c b/core/units.c
new file mode 100644
index 000000000..f0dba064b
--- /dev/null
+++ b/core/units.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "units.h"
+#include "gettext.h"
+
+int get_pressure_units(int mb, const char **units)
+{
+	int pressure;
+	const char *unit;
+	const struct units *units_p = get_units();
+
+	switch (units_p->pressure) {
+	case PASCAL:
+		pressure = mb * 100;
+		unit = translate("gettextFromC", "pascal");
+		break;
+	case BAR:
+	default:
+		pressure = (mb + 500) / 1000;
+		unit = translate("gettextFromC", "bar");
+		break;
+	case PSI:
+		pressure = mbar_to_PSI(mb);
+		unit = translate("gettextFromC", "psi");
+		break;
+	}
+	if (units)
+		*units = unit;
+	return pressure;
+}
+
+double get_temp_units(unsigned int mk, const char **units)
+{
+	double deg;
+	const char *unit;
+	const struct units *units_p = get_units();
+
+	if (units_p->temperature == FAHRENHEIT) {
+		deg = mkelvin_to_F(mk);
+		unit = "°F";
+	} else {
+		deg = mkelvin_to_C(mk);
+		unit = "°C";
+	}
+	if (units)
+		*units = unit;
+	return deg;
+}
+
+double get_volume_units(unsigned int ml, int *frac, const char **units)
+{
+	int decimals;
+	double vol;
+	const char *unit;
+	const struct units *units_p = get_units();
+
+	switch (units_p->volume) {
+	case LITER:
+	default:
+		vol = ml / 1000.0;
+		unit = translate("gettextFromC", "ℓ");
+		decimals = 1;
+		break;
+	case CUFT:
+		vol = ml_to_cuft(ml);
+		unit = translate("gettextFromC", "cuft");
+		decimals = 2;
+		break;
+	}
+	if (frac)
+		*frac = decimals;
+	if (units)
+		*units = unit;
+	return vol;
+}
+
+int units_to_sac(double volume)
+{
+	if (get_units()->volume == CUFT)
+		return lrint(cuft_to_l(volume) * 1000.0);
+	else
+		return lrint(volume * 1000);
+}
+
+depth_t units_to_depth(double depth)
+{
+	depth_t internaldepth;
+	if (get_units()->length == METERS) {
+		internaldepth.mm = lrint(depth * 1000);
+	} else {
+		internaldepth.mm = feet_to_mm(depth);
+	}
+	return internaldepth;
+}
+
+double get_depth_units(int mm, int *frac, const char **units)
+{
+	int decimals;
+	double d;
+	const char *unit;
+	const struct units *units_p = get_units();
+
+	switch (units_p->length) {
+	case METERS:
+	default:
+		d = mm / 1000.0;
+		unit = translate("gettextFromC", "m");
+		decimals = d < 20;
+		break;
+	case FEET:
+		d = mm_to_feet(mm);
+		unit = translate("gettextFromC", "ft");
+		decimals = 0;
+		break;
+	}
+	if (frac)
+		*frac = decimals;
+	if (units)
+		*units = unit;
+	return d;
+}
+
+double get_vertical_speed_units(unsigned int mms, int *frac, const char **units)
+{
+	double d;
+	const char *unit;
+	const struct units *units_p = get_units();
+	const double time_factor = units_p->vertical_speed_time == MINUTES ? 60.0 : 1.0;
+
+	switch (units_p->length) {
+	case METERS:
+	default:
+		d = mms / 1000.0 * time_factor;
+		if (units_p->vertical_speed_time == MINUTES)
+			unit = translate("gettextFromC", "m/min");
+		else
+			unit = translate("gettextFromC", "m/s");
+		break;
+	case FEET:
+		d = mm_to_feet(mms) * time_factor;
+		if (units_p->vertical_speed_time == MINUTES)
+			unit = translate("gettextFromC", "ft/min");
+		else
+			unit = translate("gettextFromC", "ft/s");
+		break;
+	}
+	if (frac)
+		*frac = d < 10;
+	if (units)
+		*units = unit;
+	return d;
+}
+
+double get_weight_units(unsigned int grams, int *frac, const char **units)
+{
+	int decimals;
+	double value;
+	const char *unit;
+	const struct units *units_p = get_units();
+
+	if (units_p->weight == LBS) {
+		value = grams_to_lbs(grams);
+		unit = translate("gettextFromC", "lbs");
+		decimals = 0;
+	} else {
+		value = grams / 1000.0;
+		unit = translate("gettextFromC", "kg");
+		decimals = 1;
+	}
+	if (frac)
+		*frac = decimals;
+	if (units)
+		*units = unit;
+	return value;
+}
diff --git a/core/units.h b/core/units.h
index 2307622e9..565b15d58 100644
--- a/core/units.h
+++ b/core/units.h
@@ -319,15 +319,28 @@ struct units {
 #define SI_UNITS                                                                                           \
         {                                                                                                  \
 	        .length = METERS, .volume = LITER, .pressure = BAR, .temperature = CELSIUS, .weight = KG,  \
-		.vertical_speed_time = MINUTES, .duration_units = MIXED, .show_units_table = false              \
+		.vertical_speed_time = MINUTES, .duration_units = MIXED, .show_units_table = false         \
         }
 
 #define IMPERIAL_UNITS                                                                                     \
         {                                                                                                  \
 	        .length = FEET, .volume = CUFT, .pressure = PSI, .temperature = FAHRENHEIT, .weight = LBS, \
-		.vertical_speed_time = MINUTES, .duration_units = MIXED, .show_units_table = false              \
+		.vertical_speed_time = MINUTES, .duration_units = MIXED, .show_units_table = false         \
         }
 
+extern const struct units SI_units, IMPERIAL_units;
+
+extern const struct units *get_units(void);
+
+extern int get_pressure_units(int mb, const char **units);
+extern double get_depth_units(int mm, int *frac, const char **units);
+extern double get_volume_units(unsigned int ml, int *frac, const char **units);
+extern double get_temp_units(unsigned int mk, const char **units);
+extern double get_weight_units(unsigned int grams, int *frac, const char **units);
+extern double get_vertical_speed_units(unsigned int mms, int *frac, const char **units);
+
+extern depth_t units_to_depth(double depth);
+extern int units_to_sac(double volume);
 #ifdef __cplusplus
 }
 #endif
diff --git a/packaging/ios/Subsurface-mobile.pro b/packaging/ios/Subsurface-mobile.pro
index c7d067698..7d78ade94 100644
--- a/packaging/ios/Subsurface-mobile.pro
+++ b/packaging/ios/Subsurface-mobile.pro
@@ -74,6 +74,7 @@ SOURCES += ../../subsurface-mobile-main.cpp \
 	../../core/taxonomy.c \
 	../../core/time.c \
 	../../core/trip.c \
+	../../core/units.c \
 	../../core/uemis.c \
 	../../core/btdiscovery.cpp \
 	../../core/connectionlistmodel.cpp \