Moved application settings to settings_t struct

Since logfp, oldstyle, and prompt were application settings, rather than
have them all as global vars, move them to a single global var, seperate
from game state, as they aren't, technically, game state, but are
application settings.

advent.h

@@ -163,6 +163,16 @@ struct game_t {
     long prop[NOBJECTS + 1];
 };
 
+/* 
+ * Game application settings - settings, but not state of the game, per se.
+ * This data is not saved in a saved game.
+ */
+struct settings_t {
+    FILE *logfp;
+    bool oldstyle;
+    bool prompt;
+};
+
 struct command_t {
     enum speechpart part;
     vocab_t verb;
@@ -172,8 +182,7 @@ struct command_t {
 };
 
 extern struct game_t game;
-extern FILE *logfp;
-extern bool oldstyle, prompt;
+extern struct settings_t settings;
 
 extern char* xstrdup(const char* s);
 extern void* xmalloc(size_t size);
@@ -218,7 +227,6 @@ extern int restore(FILE *);
 extern long initialise(void);
 extern int action(struct command_t *command);
 
-/* Alas, declaring this static confuses the coverage analyzer */
 void bug(enum bugtype, const char *) __attribute__((__noreturn__));
 
 /* end */

cheat.c

@@ -10,10 +10,6 @@
 #include <stdbool.h>
 #include "advent.h"
 
-FILE *logfp = NULL;
-bool oldstyle = false;
-bool prompt = true;
-
 int main(int argc, char *argv[])
 {
     int ch;

init.c

@@ -10,6 +10,12 @@
  * Initialisation
  */
 
+struct settings_t settings = {
+    .logfp = NULL,
+    .oldstyle = false,
+    .prompt = true
+};
+
 struct game_t game = {
     .dloc[1] = LOC_KINGHALL,
     .dloc[2] = LOC_WESTBANK,
@@ -41,7 +47,7 @@ struct game_t game = {
 
 long initialise(void)
 {
-    if (oldstyle)
+    if (settings.oldstyle)
         printf("Initialising...\n");
 
     srand(time(NULL));

main.c

@@ -25,17 +25,13 @@
 
 #define DIM(a) (sizeof(a)/sizeof(a[0]))
 
-FILE *logfp = NULL;
-bool oldstyle = false;
-bool prompt = true;
-
 // LCOV_EXCL_START
 // exclude from coverage analysis because it requires interactivity to test
 static void sig_handler(int signo)
 {
     if (signo == SIGINT) {
-        if (logfp != NULL)
-            fflush(logfp);
+        if (settings.logfp != NULL)
+            fflush(settings.logfp);
     }
     exit(EXIT_FAILURE);
 }
@@ -71,16 +67,16 @@ int main(int argc, char *argv[])
     while ((ch = getopt(argc, argv, opts)) != EOF) {
         switch (ch) {
         case 'l':
-            logfp = fopen(optarg, "w");
-            if (logfp == NULL)
+            settings.logfp = fopen(optarg, "w");
+            if (settings.logfp == NULL)
                 fprintf(stderr,
                         "advent: can't open logfile %s for write\n",
                         optarg);
             signal(SIGINT, sig_handler);
             break;
         case 'o':
-            oldstyle = true;
-            prompt = false;
+            settings.oldstyle = true;
+            settings.prompt = false;
             break;
 #ifndef ADVENT_NOSAVE
         case 'r':
@@ -121,8 +117,8 @@ int main(int argc, char *argv[])
     }
 #endif
 
-    if (logfp)
-        fprintf(logfp, "seed %ld\n", seedval);
+    if (settings.logfp)
+        fprintf(settings.logfp, "seed %ld\n", seedval);
 
     /* interpret commands until EOF or interrupt */
     for (;;) {

misc.c

@@ -325,7 +325,7 @@ char* get_input()
 {
     // Set up the prompt
     char input_prompt[] = "> ";
-    if (!prompt)
+    if (!settings.prompt)
         input_prompt[0] = '\0';
 
     // Print a blank line if game.blklin tells us to.
@@ -353,8 +353,8 @@ char* get_input()
     if (!isatty(0))
         echo_input(stdout, input_prompt, input);
 
-    if (logfp)
-        echo_input(logfp, "", input);
+    if (settings.logfp)
+        echo_input(settings.logfp, "", input);
 
     return (input);
 }
@@ -459,7 +459,7 @@ int get_motion_vocab_id(const char* word)
 {
     for (int i = 0; i < NMOTIONS; ++i) {
         for (int j = 0; j < motions[i].words.n; ++j) {
-            if (strcasecmp(word, motions[i].words.strs[j]) == 0 && (strlen(word) > 1 || strchr(ignore, word[0]) == NULL || !oldstyle))
+            if (strcasecmp(word, motions[i].words.strs[j]) == 0 && (strlen(word) > 1 || strchr(ignore, word[0]) == NULL || !settings.oldstyle))
                 return (i);
         }
     }
@@ -485,7 +485,7 @@ int get_action_vocab_id(const char* word)
 {
     for (int i = 0; i < NACTIONS; ++i) {
         for (int j = 0; j < actions[i].words.n; ++j) {
-            if (strcasecmp(word, actions[i].words.strs[j]) == 0 && (strlen(word) > 1 || strchr(ignore, word[0]) == NULL || !oldstyle))
+            if (strcasecmp(word, actions[i].words.strs[j]) == 0 && (strlen(word) > 1 || strchr(ignore, word[0]) == NULL || !settings.oldstyle))
                 return (i);
         }
     }