Use the new list macros

5 files changed, 22 insertions, 26 deletions

diff --git a/src/bftw.c b/src/bftw.c
index e6b8cd5..f3060ce 100644
--- a/src/bftw.c
+++ b/src/bftw.c
@@ -318,8 +318,7 @@ static size_t bftw_child_nameoff(const struct bftw_file *parent) {
 
 /** Destroy a cache. */
 static void bftw_cache_destroy(struct bftw_cache *cache) {
-	bfs_assert(!cache->head);
-	bfs_assert(!cache->tail);
+	bfs_assert(LIST_EMPTY(cache));
 	bfs_assert(!cache->target);
 
 	varena_destroy(&cache->files);
@@ -347,9 +346,9 @@ static struct bftw_file *bftw_file_new(struct bftw_cache *cache, struct bftw_fil
 		file->nameoff = 0;
 	}
 
-	file->next = NULL;
-	file->to_read.next = NULL;
-	file->lru.prev = file->lru.next = NULL;
+	SLIST_ITEM_INIT(file);
+	SLIST_ITEM_INIT(file, to_read);
+	LIST_ITEM_INIT(file, lru);
 
 	file->refcount = 1;
 	file->pincount = 0;
@@ -833,12 +832,11 @@ static void bftw_push_dir(struct bftw_state *state, struct bftw_file *file) {
 		SLIST_APPEND(&state->to_read, file, to_read);
 	}
 
-	while (state->to_open.head) {
-		if (bftw_ioq_opendir(state, state->to_open.head) == 0) {
-			SLIST_POP(&state->to_open);
-		} else {
+	for_slist (struct bftw_file, dir, &state->to_open) {
+		if (bftw_ioq_opendir(state, dir) != 0) {
 			break;
 		}
+		SLIST_POP(&state->to_open);
 	}
 }
 
@@ -847,7 +845,7 @@ static bool bftw_pop_dir(struct bftw_state *state) {
 	bfs_assert(!state->file);
 
 	struct bftw_cache *cache = &state->cache;
-	bool have_files = state->to_visit.head;
+	bool have_files = !SLIST_EMPTY(&state->to_visit);
 
 	if (state->flags & BFTW_SORT) {
 		// Keep strict breadth-first order when sorting
@@ -855,9 +853,9 @@ static bool bftw_pop_dir(struct bftw_state *state) {
 			return false;
 		}
 	} else {
-		while (!state->to_read.head) {
+		while (SLIST_EMPTY(&state->to_read)) {
 			// Block if we have no other files/dirs to visit, or no room in the cache
-			bool have_dirs = state->to_open.head;
+			bool have_dirs = !SLIST_EMPTY(&state->to_open);
 			bool have_room = cache->capacity > 0 && cache->dirlimit > 0;
 			bool block = !(have_dirs || have_files) || !have_room;
 
@@ -1303,7 +1301,7 @@ static void bftw_list_sort(struct bftw_list *list) {
 	bftw_list_sort(&right);
 
 	// Merge
-	while (left.head && right.head) {
+	while (!SLIST_EMPTY(&left) && !SLIST_EMPTY(&right)) {
 		struct bftw_file *lf = left.head;
 		struct bftw_file *rf = right.head;
 
diff --git a/src/color.c b/src/color.c
index b9a788b..5e78c6c 100644
--- a/src/color.c
+++ b/src/color.c
@@ -328,7 +328,7 @@ fail:
 static int build_iext_trie(struct colors *colors) {
 	trie_clear(&colors->iext_trie);
 
-	TRIE_FOR_EACH(&colors->ext_trie, leaf) {
+	for_trie (leaf, &colors->ext_trie) {
 		size_t len = leaf->length - 1;
 		if (colors->ext_len < len) {
 			colors->ext_len = len;
diff --git a/src/ctx.c b/src/ctx.c
index a940bed..3a44e68 100644
--- a/src/ctx.c
+++ b/src/ctx.c
@@ -152,7 +152,7 @@ void bfs_ctx_flush(const struct bfs_ctx *ctx) {
 	// - the user sees everything relevant before an -ok[dir] prompt
 	// - output from commands is interleaved consistently with bfs
 	// - executed commands can rely on I/O from other bfs actions
-	TRIE_FOR_EACH(&ctx->files, leaf) {
+	for_trie (leaf, &ctx->files) {
 		struct bfs_ctx_file *ctx_file = leaf->value;
 		CFILE *cfile = ctx_file->cfile;
 		if (fflush(cfile->file) == 0) {
@@ -239,7 +239,7 @@ int bfs_ctx_free(struct bfs_ctx *ctx) {
 		bfs_groups_free(ctx->groups);
 		bfs_users_free(ctx->users);
 
-		TRIE_FOR_EACH(&ctx->files, leaf) {
+		for_trie (leaf, &ctx->files) {
 			struct bfs_ctx_file *ctx_file = leaf->value;
 
 			if (ctx_file->error) {
diff --git a/src/trie.h b/src/trie.h
index dfaae15..2f51db5 100644
--- a/src/trie.h
+++ b/src/trie.h
@@ -6,6 +6,7 @@
 
 #include "config.h"
 #include "alloc.h"
+#include "list.h"
 #include <stddef.h>
 #include <stdint.h>
 
@@ -141,9 +142,7 @@ void trie_destroy(struct trie *trie);
 /**
  * Iterate over the leaves of a trie.
  */
-#define TRIE_FOR_EACH(trie, leaf) \
-	for (struct trie_leaf *leaf = (trie)->head, *_next; \
-	     leaf && (_next = leaf->next, true); \
-	     leaf = _next)
+#define for_trie(leaf, trie) \
+	for_list(struct trie_leaf, leaf, trie)
 
 #endif // BFS_TRIE_H
diff --git a/src/xspawn.c b/src/xspawn.c
index 2cabdcc..80bafef 100644
--- a/src/xspawn.c
+++ b/src/xspawn.c
@@ -49,8 +49,8 @@ int bfs_spawn_init(struct bfs_spawn *ctx) {
 }
 
 int bfs_spawn_destroy(struct bfs_spawn *ctx) {
-	while (ctx->head) {
-		free(SLIST_POP(ctx));
+	for_slist (struct bfs_spawn_action, action, ctx) {
+		free(action);
 	}
 
 	return 0;
@@ -68,7 +68,7 @@ static struct bfs_spawn_action *bfs_spawn_add(struct bfs_spawn *ctx, enum bfs_sp
 		return NULL;
 	}
 
-	action->next = NULL;
+	SLIST_ITEM_INIT(action);
 	action->op = op;
 	action->in_fd = -1;
 	action->out_fd = -1;
@@ -138,7 +138,7 @@ int bfs_spawn_addsetrlimit(struct bfs_spawn *ctx, int resource, const struct rli
 static void bfs_spawn_exec(const char *exe, const struct bfs_spawn *ctx, char **argv, char **envp, int pipefd[2]) {
 	xclose(pipefd[0]);
 
-	for (const struct bfs_spawn_action *action = ctx ? ctx->head : NULL; action; action = action->next) {
+	for_slist (const struct bfs_spawn_action, action, ctx) {
 		// Move the error-reporting pipe out of the way if necessary...
 		if (action->out_fd == pipefd[1]) {
 			int fd = dup_cloexec(pipefd[1]);
@@ -199,9 +199,8 @@ pid_t bfs_spawn(const char *exe, const struct bfs_spawn *ctx, char **argv, char
 		envp = environ;
 	}
 
-	enum bfs_spawn_flags flags = ctx ? ctx->flags : 0;
 	char *resolved = NULL;
-	if (flags & BFS_SPAWN_USEPATH) {
+	if (ctx->flags & BFS_SPAWN_USEPATH) {
 		exe = resolved = bfs_spawn_resolve(exe);
 		if (!resolved) {
 			return -1;