From 78ebbfe2ce56d5504cbee0883c747fb427279653 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Sun, 5 Feb 2017 17:29:12 -0500
Subject: Make -quit happen immediately, not at the end of the current
 expression

---
 eval.c              | 34 +++++++++++++++++++++++++++++++---
 tests.sh            | 12 +++++++++++-
 tests/test_0139.out |  1 +
 tests/test_0140.out |  0
 4 files changed, 43 insertions(+), 4 deletions(-)
 create mode 100644 tests/test_0139.out
 create mode 100644 tests/test_0140.out

diff --git a/eval.c b/eval.c
index f24c7c4..7ca9aa8 100644
--- a/eval.c
+++ b/eval.c
@@ -38,6 +38,8 @@ struct eval_state {
 	enum bftw_action action;
 	/** The eval_cmdline() return value. */
 	int *ret;
+	/** Whether to quit immediately. */
+	bool *quit;
 	/** A stat() buffer, if necessary. */
 	struct stat statbuf;
 };
@@ -777,6 +779,7 @@ bool eval_prune(const struct expr *expr, struct eval_state *state) {
  */
 bool eval_quit(const struct expr *expr, struct eval_state *state) {
 	state->action = BFTW_STOP;
+	*state->quit = true;
 	return true;
 }
 
@@ -1005,14 +1008,30 @@ bool eval_not(const struct expr *expr, struct eval_state *state) {
  * Evaluate a conjunction.
  */
 bool eval_and(const struct expr *expr, struct eval_state *state) {
-	return eval_expr(expr->lhs, state) && eval_expr(expr->rhs, state);
+	if (!eval_expr(expr->lhs, state)) {
+		return false;
+	}
+
+	if (*state->quit) {
+		return false;
+	}
+
+	return eval_expr(expr->rhs, state);
 }
 
 /**
  * Evaluate a disjunction.
  */
 bool eval_or(const struct expr *expr, struct eval_state *state) {
-	return eval_expr(expr->lhs, state) || eval_expr(expr->rhs, state);
+	if (eval_expr(expr->lhs, state)) {
+		return true;
+	}
+
+	if (*state->quit) {
+		return false;
+	}
+
+	return eval_expr(expr->rhs, state);
 }
 
 /**
@@ -1020,6 +1039,11 @@ bool eval_or(const struct expr *expr, struct eval_state *state) {
  */
 bool eval_comma(const struct expr *expr, struct eval_state *state) {
 	eval_expr(expr->lhs, state);
+
+	if (*state->quit) {
+		return false;
+	}
+
 	return eval_expr(expr->rhs, state);
 }
 
@@ -1058,6 +1082,8 @@ struct callback_args {
 	const struct cmdline *cmdline;
 	/** Eventual return value from eval_cmdline(). */
 	int ret;
+	/** Whether to quit immediately. */
+	bool quit;
 };
 
 /**
@@ -1073,6 +1099,7 @@ static enum bftw_action cmdline_callback(struct BFTW *ftwbuf, void *ptr) {
 		.cmdline = cmdline,
 		.action = BFTW_CONTINUE,
 		.ret = &args->ret,
+		.quit = &args->quit,
 	};
 
 	if (ftwbuf->typeflag == BFTW_ERROR) {
@@ -1178,9 +1205,10 @@ int eval_cmdline(const struct cmdline *cmdline) {
 	struct callback_args args = {
 		.cmdline = cmdline,
 		.ret = 0,
+		.quit = false,
 	};
 
-	for (struct root *root = cmdline->roots; root; root = root->next) {
+	for (struct root *root = cmdline->roots; root && !args.quit; root = root->next) {
 		if (bftw(root->path, cmdline_callback, nopenfd, cmdline->flags, &args) != 0) {
 			args.ret = -1;
 			perror("bftw()");
diff --git a/tests.sh b/tests.sh
index 001fea4..d83f824 100755
--- a/tests.sh
+++ b/tests.sh
@@ -841,9 +841,19 @@ function test_0138() {
     bfs_diff basic/g -depth -name g
 }
 
+function test_0139() {
+    [ "$BSD" -o "$GNU" ] || return 0
+    bfs_diff basic basic -print -quit
+}
+
+function test_0140() {
+    [ "$BSD" -o "$GNU" ] || return 0
+    bfs_diff basic basic -quit -print
+}
+
 result=0
 
-for i in {1..138}; do
+for i in {1..140}; do
     test="test_$(printf '%04d' $i)"
 
     if [ -t 1 ]; then
diff --git a/tests/test_0139.out b/tests/test_0139.out
new file mode 100644
index 0000000..15a13db
--- /dev/null
+++ b/tests/test_0139.out
@@ -0,0 +1 @@
+basic
diff --git a/tests/test_0140.out b/tests/test_0140.out
new file mode 100644
index 0000000..e69de29
-- 
cgit v1.2.3