Cleanup: Make gaspressures.h a regular include file

gaspressure.h had definitions of non-exported structs, but did
not declare the only function exported by gaspressure.c.

Therefore, move the struct definitions into gaspressure.c and
the declarations of the populate_pressure_information() function
from profile.c to gaspressures.h.

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

core/gaspressures.c

@@ -25,6 +25,30 @@
 #include "gaspressures.h"
 #include "pref.h"
 
+/*
+ * simple structure to track the beginning and end tank pressure as
+ * well as the integral of depth over time spent while we have no
+ * pressure reading from the tank */
+typedef struct pr_track_struct pr_track_t;
+struct pr_track_struct {
+	int start;
+	int end;
+	int t_start;
+	int t_end;
+	int pressure_time;
+	pr_track_t *next;
+};
+
+typedef struct pr_interpolate_struct pr_interpolate_t;
+struct pr_interpolate_struct {
+	int start;
+	int end;
+	int pressure_time;
+	int acc_pressure_time;
+};
+
+enum interpolation_strategy {SAC, TIME, CONSTANT};
+
 static pr_track_t *pr_track_alloc(int start, int t_start)
 {
 	pr_track_t *pt = malloc(sizeof(pr_track_t));

core/gaspressures.h

@@ -6,29 +6,7 @@
 extern "C" {
 #endif
 
-/*
+void populate_pressure_information(struct dive *, struct divecomputer *, struct plot_info *, int);
- * simple structure to track the beginning and end tank pressure as
- * well as the integral of depth over time spent while we have no
- * pressure reading from the tank */
-typedef struct pr_track_struct pr_track_t;
-struct pr_track_struct {
-	int start;
-	int end;
-	int t_start;
-	int t_end;
-	int pressure_time;
-	pr_track_t *next;
-};
-
-typedef struct pr_interpolate_struct pr_interpolate_t;
-struct pr_interpolate_struct {
-	int start;
-	int end;
-	int pressure_time;
-	int acc_pressure_time;
-};
-
-enum interpolation_strategy {SAC, TIME, CONSTANT};
 
 #ifdef __cplusplus
 }

core/profile.c

@@ -32,7 +32,6 @@ struct dive *current_dive = NULL;
 unsigned int dc_number = 0;
 
 static struct plot_data *last_pi_entry_new = NULL;
-void populate_pressure_information(struct dive *, struct divecomputer *, struct plot_info *, int);
 
 #ifdef DEBUG_PI
 /* debugging tool - not normally used */