Update minion.c

src/NetHack_3.7/src/minion.c

@@ -16,22 +16,22 @@ static const int elementals[4] = {
 void
 newemin(struct monst *mtmp)
 {
-    if (!mtmp->mextra)
-        mtmp->mextra = newmextra();
-    if (!EMIN(mtmp)) {
-        EMIN(mtmp) = (struct emin *) alloc(sizeof(struct emin));
-        (void) memset((genericptr_t) EMIN(mtmp), 0, sizeof(struct emin));
+    if (!mtmp->mextra) // If the monster does not have an mextra structure
+        mtmp->mextra = newmextra(); // Create a new mextra structure for the monster
+    if (!EMIN(mtmp)) { // If the monster does not have an emin structure
+        EMIN(mtmp) = (struct emin *) alloc(sizeof(struct emin)); // Allocate memory for the emin structure
+        (void) memset((genericptr_t) EMIN(mtmp), 0, sizeof(struct emin)); // Initialize the emin structure with zeros
     }
 }
 
 void
 free_emin(struct monst *mtmp)
 {
-    if (mtmp->mextra && EMIN(mtmp)) {
-        free((genericptr_t) EMIN(mtmp));
-        EMIN(mtmp) = (struct emin *) 0;
+    if (mtmp->mextra && EMIN(mtmp)) { // If the monster has an mextra structure and an emin structure
+        free((genericptr_t) EMIN(mtmp)); // Free the memory allocated for the emin structure
+        EMIN(mtmp) = (struct emin *) 0; // Set the emin pointer to null
     }
-    mtmp->isminion = 0;
+    mtmp->isminion = 0; // Set the isminion flag to 0 to indicate that the monster is not a minion
 }
 
 /* count the number of monsters on the level */
@@ -42,15 +42,15 @@ monster_census(boolean spotted) /* seen|sensed vs all */
     int count = 0;
 
     for (mtmp = fmon; mtmp; mtmp = mtmp->nmon) {
-        if (DEADMONSTER(mtmp))
+        if (DEADMONSTER(mtmp)) // If the monster is dead, skip to the next monster
             continue;
-        if (mtmp->isgd && mtmp->mx == 0)
+        if (mtmp->isgd && mtmp->mx == 0) // If the monster is a guardian and is not on the map, skip to the next monster
             continue;
-        if (spotted && !canspotmon(mtmp))
+        if (spotted && !canspotmon(mtmp)) // If spotted flag is true and the monster is not visible, skip to the next monster
             continue;
-        ++count;
+        ++count; // Increment the count
     }
-    return count;
+    return count; // Return the final count
 }
 
 /* mon summons a monster */
@@ -133,11 +133,11 @@ msummon(struct monst *mon)
      * If this daemon is unique and being re-summoned (the only way we
      * could get this far with an extinct dtype), try another.
      */
-    if ((gm.mvitals[dtype].mvflags & G_GONE) != 0) {
-        dtype = ndemon(atyp);
-        if (dtype == NON_PM)
-            return 0;
-    }
+    if ((gm.mvitals[dtype].mvflags & G_GONE) != 0) { // Check if the monster type is flagged as gone
+        dtype = ndemon(atyp); // Generate a new demon monster type
+        if (dtype == NON_PM) // If the generated type is not a valid monster type
+            return 0; // Return 0 to indicate failure
+}
 
     /* some candidates can generate a group of monsters, so simple
        count of non-null makemon() result is not sufficient */
@@ -426,12 +426,12 @@ lminion(void)
     struct permonst *ptr;
 
     for (tryct = 0; tryct < 20; tryct++) {
-        ptr = mkclass(S_ANGEL, 0);
-        if (ptr && !is_lord(ptr))
-            return monsndx(ptr);
+        ptr = mkclass(S_ANGEL, 0); // Generate a random monster class of angels
+        if (ptr && !is_lord(ptr)) // If a valid non-lord monster is generated
+            return monsndx(ptr); // Return the monster number
     }
 
-    return NON_PM;
+    return NON_PM; // Return NON_PM if no valid non-lord monster can be generated after 20 tries
 }
 
 int