From: Christian Heller <c.heller@plomlompom.de>
Date: Sun, 17 Aug 2014 02:26:47 +0000 (+0200)
Subject: Remove redundant uses of NULL.
X-Git-Tag: tce~656
X-Git-Url: https://plomlompom.com/repos/%22https:/validator.w3.org/%7B%7Byoutube_prefix%7D%7D%7B%7Bresult.id%7D%7D?a=commitdiff_plain;h=491e8bc8e7a9b1d312256817c0b8be7e05b127be;p=plomrogue

Remove redundant uses of NULL.
---

diff --git a/src/client/command_db.c b/src/client/command_db.c
index a7523b7..34ca821 100644
--- a/src/client/command_db.c
+++ b/src/client/command_db.c
@@ -64,7 +64,7 @@ static void tokens_into_entries(char * token0, char * token1)
             cmd = (struct Command *) parse_init_entry(&cmd_flags,
                                                       sizeof(struct Command));
             cmd->dsc_short = strdup(token1);
-            parse_id_uniq(NULL != get_command(cmd->dsc_short));
+            parse_id_uniq(!(!get_command(cmd->dsc_short)));
         }
         else if (!(   parse_flagval(token0, token1, "DESCRIPTION", &cmd_flags,
                                     DESC_SET, 's', (char *) &cmd->dsc_long)
diff --git a/src/client/interface_conf.c b/src/client/interface_conf.c
index 9e97c55..45abd6a 100644
--- a/src/client/interface_conf.c
+++ b/src/client/interface_conf.c
@@ -243,7 +243,7 @@ static uint8_t start_win(char * token0, char * token1, char * str_win,
     }
     *win = (struct Win *) parse_init_entry(win_flags, sizeof(struct Win));
     parsetest_singlechar(token1);
-    parse_id_uniq(world.winDB.ids && (NULL!=strchr(world.winDB.ids,token1[0])));
+    parse_id_uniq(world.winDB.ids && strchr(world.winDB.ids,token1[0]));
     (*win)->id = token1[0];
     return 1;
 }
@@ -367,7 +367,7 @@ static void set_keybindings(char * token1, uint8_t flags,
     }
     kb.keycode = atoi(token1);
     char * err_uniq = "Binding to key already defined.";
-    err_line(NULL != get_command_to_keycode(kbdb, kb.keycode), err_uniq);
+    err_line(!(!get_command_to_keycode(kbdb, kb.keycode)), err_uniq);
     kb.command = get_command(token2);
     err_line(!(kb.command), "No such command in command DB.");
     array_append(kbdb->n_of_kbs, sizeof(struct KeyBinding), (void *) &kb,
diff --git a/src/client/io.c b/src/client/io.c
index c0cf977..39fd75e 100644
--- a/src/client/io.c
+++ b/src/client/io.c
@@ -98,7 +98,7 @@ static void read_inventory(char * read_buf, uint32_t linemax, FILE * file)
             break;
         }
         int old_size = 0;
-        if (NULL != world.player_inventory)
+        if (world.player_inventory)
         {
             old_size = strlen(world.player_inventory);
         }
@@ -146,7 +146,7 @@ static void read_log(char * read_buf, uint32_t linemax, FILE * file)
     while (try_fgets(read_buf, linemax + 1, file, __func__))
     {
         int old_size = 0;
-        if (NULL != world.log)
+        if (world.log)
         {
             old_size = strlen(world.log);
         }
diff --git a/src/client/parse.c b/src/client/parse.c
index 54d8fc3..c233a92 100644
--- a/src/client/parse.c
+++ b/src/client/parse.c
@@ -31,7 +31,7 @@ extern void parse_file(char * path, void (* token_to_entry) (char *, char *))
     char * errline_line = try_malloc(linemax + 1, __func__);
     set_err_line_options(errline_intro, errline_line, 1);
     err_line_zero();
-    err_line(0 == linemax, "File is empty.");
+    err_line(!linemax, "File is empty.");
     char * token0 = NULL; /* For final token_to_entry() if while() stagnates. */
     char * token1 = NULL;
     char * err_val = "No value given.";
@@ -65,7 +65,7 @@ extern void parsetest_defcontext(uint8_t flags)
 
 extern void parsetest_too_many_values()
 {
-    err_line(NULL != token_from_line(NULL), "Too many values.");
+    err_line(!(!token_from_line(NULL)), "Too many values.");
 }
 
 
diff --git a/src/client/wincontrol.c b/src/client/wincontrol.c
index 85750ec..7dadbc8 100644
--- a/src/client/wincontrol.c
+++ b/src/client/wincontrol.c
@@ -220,7 +220,7 @@ static void suspend_win(struct Win * w)
 extern void toggle_window(char id)
 {
     struct Win * win = get_win_by_id(id);
-    if (NULL == strchr(world.winDB.order, id))
+    if (!strchr(world.winDB.order, id))
     {
         append_win(win);
         return;
diff --git a/src/client/windows.c b/src/client/windows.c
index 3881393..14cf9b2 100644
--- a/src/client/windows.c
+++ b/src/client/windows.c
@@ -400,7 +400,7 @@ extern void make_v_screen_and_init_win_sizes()
     world.winDB.v_screen_size.y = maxy_test;
     world.winDB.v_screen_size.x = maxx_test;
     world.winDB.v_screen = newpad(world.winDB.v_screen_size.y, 1);
-    exit_trouble(NULL == world.winDB.v_screen, __func__, err_m);
+    exit_trouble(!world.winDB.v_screen, __func__, err_m);
     char id;
     while (0 != (id = get_next_win_id()))
     {
diff --git a/src/common/readwrite.c b/src/common/readwrite.c
index ac7b56a..a206c9c 100644
--- a/src/common/readwrite.c
+++ b/src/common/readwrite.c
@@ -26,7 +26,7 @@ extern FILE * try_fopen(char * path, char * mode, const char * f)
     int test = sprintf(msg, "%s%s%s%s%s%s%s", msg1,f,msg2,mode,msg3,path,msg4);
     exit_trouble(test < 0, __func__, "sprintf");
     FILE * file_p = fopen(path, mode);
-    exit_err(NULL == file_p, msg);
+    exit_err(!file_p, msg);
     free(msg);
     return file_p;
 }
@@ -68,7 +68,7 @@ extern int try_fgetc(FILE * file, const char * f)
 extern char * try_fgets(char * line, int linemax, FILE * file, const char * f)
 {
     char * test = fgets(line, linemax, file);
-    exit_trouble(NULL == test && ferror(file), f, "fgets");
+    exit_trouble(!test && ferror(file), f, "fgets");
     return test;
 }
 
diff --git a/src/common/rexit.c b/src/common/rexit.c
index a3e18b2..b528975 100644
--- a/src/common/rexit.c
+++ b/src/common/rexit.c
@@ -28,7 +28,7 @@ extern void exit_err(int err, const char * msg)
         return;
     }
     cleanup_func();
-    if (NULL == msg)
+    if (!msg)
     {
         msg = "Details unknown.";
     }
diff --git a/src/common/try_malloc.c b/src/common/try_malloc.c
index 81e75bf..41d80c9 100644
--- a/src/common/try_malloc.c
+++ b/src/common/try_malloc.c
@@ -13,12 +13,12 @@ extern void * try_malloc(size_t size, const char * f)
 {
     char * prefix = "Trouble with malloc in ";
     char * msg = malloc(strlen(prefix) + strlen(f) + 1 + 1);
-    exit_err(NULL == msg,
+    exit_err(!msg,
              "Trouble in try_malloc with malloc for error message string.");
     int test = sprintf(msg, "%s%s.", prefix, f);
     exit_err(test < 0, "Trouble in try_malloc with sprintf.");
     void * p = malloc(size);
-    exit_err(NULL == p, msg); /* Bypass exit_trouble() calling try_malloc(). */
+    exit_err(!p, msg);         /* Bypass exit_trouble() calling try_malloc(). */
     free(msg);
     return p;
 }
diff --git a/src/server/ai.c b/src/server/ai.c
index cdefca8..630c2db 100644
--- a/src/server/ai.c
+++ b/src/server/ai.c
@@ -1,7 +1,6 @@
 /* src/server/ai.c */
 
 #include "ai.h"
-#include <stddef.h> /* NULL */
 #include <stdint.h> /* uint8_t, uint16_t, uint32_t, int16_t, UINT16_MAX */
 #include <stdlib.h> /* free() */
 #include "../common/try_malloc.h" /* try_malloc() */
@@ -268,7 +267,7 @@ static int16_t get_inventory_slot_to_consume(struct Thing * t_owner)
     int16_t selection = -1;
     struct Thing * t = t_owner->owns;;
     uint8_t i;
-    for (i = 0; t != NULL; t = t->next, i++)
+    for (i = 0; t; t = t->next, i++)
     {
         struct ThingType * tt = get_thing_type(t->type);
         if (tt->consumable > compare_consumability)
@@ -285,7 +284,7 @@ static int16_t get_inventory_slot_to_consume(struct Thing * t_owner)
 static uint8_t standing_on_consumable(struct Thing * t_standing)
 {
     struct Thing * t = world.things;
-    for (; t != NULL; t = t->next)
+    for (; t; t = t->next)
     {
         if (   t != t_standing
             && t->pos.y == t_standing->pos.y && t->pos.x == t_standing->pos.x)
diff --git a/src/server/field_of_view.c b/src/server/field_of_view.c
index 4b1ac00..07e1455 100644
--- a/src/server/field_of_view.c
+++ b/src/server/field_of_view.c
@@ -374,7 +374,7 @@ static void update_map_memory(struct Thing * t_eye, uint32_t map_size)
     struct ThingInMemory * tm = t_eye->t_mem;
     struct ThingInMemory * tm_prev = NULL;
     struct ThingInMemory * tm_next = NULL;
-    for (; tm != NULL; tm = tm_next)
+    for (; tm; tm = tm_next)
     {
         tm_next = tm->next;
         if ('v' == t_eye->fov_map[tm->pos.y * world.map.length + tm->pos.x])
@@ -393,7 +393,7 @@ static void update_map_memory(struct Thing * t_eye, uint32_t map_size)
         tm_prev = tm;
     }
     struct Thing * t = world.things;
-    for (; t != NULL; t = t->next)
+    for (; t; t = t->next)
     {
         if (   !t->lifepoints
             && 'v' == t_eye->fov_map[t->pos.y * world.map.length + t->pos.x])
diff --git a/src/server/god_commands.c b/src/server/god_commands.c
index 09aeece..420142a 100644
--- a/src/server/god_commands.c
+++ b/src/server/god_commands.c
@@ -301,7 +301,7 @@ static uint8_t parse_thing_manipulation_1arg(char * tok0, char * tok1)
     {
         t = get_thing(world.things, id, 1);
         char * err = "No thing type found to initialize new thing.";
-        if (!t && !err_line(NULL == world.thing_types, err))
+        if (!t && !err_line(!world.thing_types, err))
         {
             t = add_thing(id, world.thing_types->id, 0, 0);
             if (world.exists && t->lifepoints)
diff --git a/src/server/init.c b/src/server/init.c
index 49ba22a..aa5761c 100644
--- a/src/server/init.c
+++ b/src/server/init.c
@@ -55,7 +55,7 @@ static void obey_lines_from_file(char * path, uint8_t record)
     FILE * file = try_fopen(path, "r", __func__);
     uint32_t linemax = textfile_width(file);
     char * line = try_malloc(linemax + 1, __func__);
-    while (NULL != try_fgets(line, linemax + 1, file, __func__))
+    while (try_fgets(line, linemax + 1, file, __func__))
     {
         if (strlen(line))
         {
@@ -84,7 +84,7 @@ static void replay_game()
     uint32_t linemax = textfile_width(file);
     char * line = try_malloc(linemax + 1, __func__);
     while (   world.turn < world.replay
-           && NULL != try_fgets(line, linemax + 1, file, __func__))
+           && try_fgets(line, linemax + 1, file, __func__))
     {
         obey_msg(line, 0, 1);
         err_line_inc();
@@ -112,7 +112,7 @@ static uint8_t world_cannot_be_made()
 {
     uint8_t player_will_be_generated = 0;
     struct ThingType * tt;
-    for (tt = world.thing_types; NULL != tt; tt = tt->next)
+    for (tt = world.thing_types; tt; tt = tt->next)
     {
         if (world.player_type == tt->id)
         {
@@ -197,7 +197,7 @@ extern uint8_t remake_world()
     free_things(world.things);
     remake_map();
     struct ThingType * tt;
-    for (tt = world.thing_types; NULL != tt; tt = tt->next)
+    for (tt = world.thing_types; tt; tt = tt->next)
     {
         if (world.player_type == tt->id)
         {
@@ -205,7 +205,7 @@ extern uint8_t remake_world()
             break;
         }
     }
-    for (tt = world.thing_types; NULL != tt; tt = tt->next)
+    for (tt = world.thing_types; tt; tt = tt->next)
     {
         if (world.player_type != tt->id)
         {
@@ -213,7 +213,7 @@ extern uint8_t remake_world()
         }
     }
     struct Thing * t;
-    for (t = world.things; NULL != t; t = t->next)
+    for (t = world.things; t; t = t->next)
     {
         if (t->lifepoints)
         {
diff --git a/src/server/io.c b/src/server/io.c
index 8f8f738..d8190c6 100644
--- a/src/server/io.c
+++ b/src/server/io.c
@@ -289,7 +289,7 @@ static void write_value_as_line(uint32_t value, FILE * file)
 static void write_inventory(struct Thing * player, FILE * file)
 {
     struct Thing * owned = player->owns;
-    if (NULL == owned)
+    if (!owned)
     {
         char * empty = "(none)\n";
         try_fwrite(empty, strlen(empty), 1, file, __func__);
@@ -297,7 +297,7 @@ static void write_inventory(struct Thing * player, FILE * file)
     else
     {
         uint8_t q;
-        for (q = 0; NULL != owned; q++)
+        for (q = 0; owned; q++)
         {
             struct ThingType * tt = get_thing_type(owned->type);
             try_fwrite(tt->name, strlen(tt->name), 1, file, __func__);
@@ -372,7 +372,7 @@ static void write_map(struct Thing * player, FILE * file)
     struct ThingInMemory * tm;
     for (i = 0; i < 2; i++)
     {
-        for (tm = player->t_mem; tm != NULL; tm = tm->next)
+        for (tm = player->t_mem; tm; tm = tm->next)
         {
             if (' ' != player->mem_map[tm->pos.y*world.map.length+tm->pos.x])
             {
diff --git a/src/server/run.c b/src/server/run.c
index 906bed2..786b280 100644
--- a/src/server/run.c
+++ b/src/server/run.c
@@ -208,7 +208,7 @@ static void turn_over()
     while (    0 < player->lifepoints
            || (0 == player->lifepoints && start_turn == world.turn))
     {
-        if (NULL == thing)
+        if (!thing)
         {
             world.turn++;
             thing = world.things;
@@ -285,7 +285,7 @@ extern void obey_msg(char * msg, uint8_t do_record, uint8_t do_verbose)
     set_err_line_options("Trouble with message: ", msg, 0);
     char * msg_copy = strdup(msg);
     char * tok0 = token_from_line(msg_copy);
-    if (NULL != tok0)
+    if (tok0)
     {
 
         if (parse_command(tok0))
@@ -299,7 +299,7 @@ extern void obey_msg(char * msg, uint8_t do_record, uint8_t do_verbose)
                 record(msg, 0);
             }
             char * tokplus = token_from_line(NULL);
-            err_line(NULL != tokplus, "Too many arguments, ignoring overflow.");
+            err_line(!(!tokplus), "Too many arguments, ignoring overflow.");
             free(msg_copy);
             return;
         }
@@ -316,7 +316,7 @@ extern uint8_t io_loop()
     {
         char * msg = io_round();
         server_test();
-        if (NULL == msg)
+        if (!msg)
         {
             continue;
         }
diff --git a/src/server/thing_actions.c b/src/server/thing_actions.c
index 40a44ba..ec713ae 100644
--- a/src/server/thing_actions.c
+++ b/src/server/thing_actions.c
@@ -286,7 +286,7 @@ extern void actor_move(struct Thing * t)
 
 extern void actor_drop(struct Thing * t)
 {
-    uint8_t owns_none = (NULL == t->owns);
+    uint8_t owns_none = (!t->owns);
     if (!owns_none)
     {
         uint8_t select = t->arg;
@@ -307,21 +307,21 @@ extern void actor_pick(struct Thing * t)
 {
     struct Thing * picked = NULL;
     struct Thing * t_i;
-    for (t_i = world.things; NULL != t_i; t_i = t_i->next)
+    for (t_i = world.things; t_i; t_i = t_i->next)
     {
         if (t_i != t && yx_uint8_cmp(&t_i->pos, &t->pos))
         {
             picked = t_i;
         }
     }
-    if (NULL != picked)
+    if (picked)
     {
         own_thing(&t->owns, &world.things, picked->id);
         set_thing_position(picked, t->pos);
     }
     if (t == get_player())
     {
-        playerbonus_pick(NULL != picked);
+        playerbonus_pick(!(!picked));
     }
 }
 
@@ -330,7 +330,7 @@ extern void actor_pick(struct Thing * t)
 extern void actor_use(struct Thing * t)
 {
     uint8_t wrong_thing = 1;
-    uint8_t no_thing = (NULL == t->owns);
+    uint8_t no_thing = (!t->owns);
     if (!no_thing)
     {
         uint8_t select = t->arg;
diff --git a/src/server/things.c b/src/server/things.c
index 7d0f62d..bbe9dbf 100644
--- a/src/server/things.c
+++ b/src/server/things.c
@@ -45,7 +45,7 @@ static struct NextAndId * add_to_struct_list(size_t n_size, uint8_t start_id,
 
 static void free_things_in_memory(struct ThingInMemory * tm)
 {
-    if (NULL == tm)
+    if (!tm)
     {
         return;
     }
@@ -82,7 +82,7 @@ static struct NextAndId * add_to_struct_list(size_t n_size, uint8_t start_id,
         }
     }
     struct NextAndId ** nai_ptr_ptr = start;
-    for (; NULL != * nai_ptr_ptr; nai_ptr_ptr = &(*nai_ptr_ptr)->next);
+    for (; * nai_ptr_ptr; nai_ptr_ptr = &(*nai_ptr_ptr)->next);
     *nai_ptr_ptr = nai;
     return nai;
 }
@@ -151,7 +151,7 @@ extern void add_thing_to_memory_map(struct Thing * t, uint8_t type,
 
 extern void free_thing_actions(struct ThingAction * ta)
 {
-    if (NULL == ta)
+    if (!ta)
     {
         return;
     }
@@ -164,7 +164,7 @@ extern void free_thing_actions(struct ThingAction * ta)
 
 extern void free_thing_types(struct ThingType * tt)
 {
-    if (NULL == tt)
+    if (!tt)
     {
         return;
     }
@@ -177,7 +177,7 @@ extern void free_thing_types(struct ThingType * tt)
 
 extern void free_things(struct Thing * t)
 {
-    if (NULL == t)
+    if (!t)
     {
         return;
     }
@@ -198,7 +198,7 @@ extern void free_things(struct Thing * t)
 extern struct ThingAction * get_thing_action(uint8_t id)
 {
     struct ThingAction * ta = world.thing_actions;
-    for (; NULL != ta && id != ta->id; ta = ta->next);
+    for (; ta && id != ta->id; ta = ta->next);
     return ta;
 }
 
@@ -207,7 +207,7 @@ extern struct ThingAction * get_thing_action(uint8_t id)
 extern struct ThingType * get_thing_type(uint8_t id)
 {
     struct ThingType * tt = world.thing_types;
-    for (; NULL != tt && id != tt->id; tt = tt->next);
+    for (; tt && id != tt->id; tt = tt->next);
     return tt;
 }
 
@@ -216,7 +216,7 @@ extern struct ThingType * get_thing_type(uint8_t id)
 extern uint8_t get_thing_action_id_by_name(char * name)
 {
     struct ThingAction * ta = world.thing_actions;
-    while (NULL != ta)
+    while (ta)
     {
         if (0 == strcmp(ta->name, name))
         {
@@ -237,14 +237,14 @@ extern struct Thing * get_thing(struct Thing * ptr, uint8_t id, uint8_t deep)
 {
     while (1)
     {
-        if (NULL == ptr || id == ptr->id)
+        if (!ptr || id == ptr->id)
         {
             return ptr;
         }
         if (deep)
         {
             struct Thing * owned_thing = get_thing(ptr->owns, id, 1);
-            if (NULL != owned_thing)
+            if (owned_thing)
             {
                 return ptr;
             }
@@ -324,7 +324,7 @@ extern void own_thing(struct Thing ** target, struct Thing ** source,
         penult->next = t->next;
     }
     struct Thing ** t_ptr_ptr = target;
-    for (; NULL != * t_ptr_ptr; t_ptr_ptr = &(*t_ptr_ptr)->next);
+    for (; * t_ptr_ptr; t_ptr_ptr = &(*t_ptr_ptr)->next);
     * t_ptr_ptr = t;
     t->next = NULL;
 }
@@ -335,5 +335,5 @@ extern void set_thing_position(struct Thing * t, struct yx_uint8 pos)
 {
     t->pos = pos;
     struct Thing * owned = t->owns;
-    for (; owned != NULL; set_thing_position(owned, pos), owned = owned->next);
+    for (; owned; set_thing_position(owned, pos), owned = owned->next);
 }