From 05a8ff0ee5a003e816519486ae78aa4156dfffb4 Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Sun, 24 Feb 2019 11:22:34 -0800
Subject: scan: Handle escaped newlines

---
 scan.c                    | 20 ++++++++++++++++----
 tests/escaped-newline.c   |  2 ++
 tests/escaped-newline.qbe |  1 +
 3 files changed, 19 insertions(+), 4 deletions(-)
 create mode 100644 tests/escaped-newline.c
 create mode 100644 tests/escaped-newline.qbe

diff --git a/scan.c b/scan.c
index 22c1821..473400f 100644
--- a/scan.c
+++ b/scan.c
@@ -47,13 +47,25 @@ bufget(struct buffer *b)
 static void
 nextchar(struct scanner *s)
 {
+	int c;
+
 	if (s->usebuf)
 		bufadd(&s->buf, s->chr);
-	s->chr = getchar();
-	if (s->chr == '\n')
+	for (;;) {
+		s->chr = getchar();
+		if (s->chr == '\n')
+			++s->loc.line, s->loc.col = 1;
+		else
+			++s->loc.col;
+		if (s->chr != '\\')
+			break;
+		c = getchar();
+		if (c != '\n') {
+			ungetc(c, stdin);
+			break;
+		}
 		++s->loc.line, s->loc.col = 1;
-	else
-		++s->loc.col;
+	}
 }
 
 static int
diff --git a/tests/escaped-newline.c b/tests/escaped-newline.c
new file mode 100644
index 0000000..d659179
--- /dev/null
+++ b/tests/escaped-newline.c
@@ -0,0 +1,2 @@
+int split\
+ident = 3;
diff --git a/tests/escaped-newline.qbe b/tests/escaped-newline.qbe
new file mode 100644
index 0000000..cd2b5bf
--- /dev/null
+++ b/tests/escaped-newline.qbe
@@ -0,0 +1 @@
+export data $splitident = align 4 { w 3, }
-- 
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