From 0b53bf08b02736ca4facdc13099ae360bbe4a541 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Sun, 8 Nov 2020 00:46:57 +0100
Subject: keep track of line breaks in variable

---
 tea.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'tea.c')

diff --git a/tea.c b/tea.c
index d580493..5839ef9 100644
--- a/tea.c
+++ b/tea.c
@@ -20,10 +20,14 @@ char **lines;
 int lines_c;
 int lines_s;
 
-char *src;
+char *src; /* source text */
 int src_l;
 int src_s;
 
+int *breaks; /* position of broken lines in source text */
+             /* (1 where a character is displayed on a new line,
+		 0 otherwise.) */
+
 int x, y; /* current cursor position */
 int w, h; /* terminal width, height */
 int margin = 10;
@@ -99,8 +103,8 @@ int left() {}
 
 void addc(char c) {
 	if (c != '\n' && x + 1 > w) {
-		prn("\r");
-		addc('\n');
+		prn("\r\n");
+		breaks[src_l + 1] = 1;
 		x = margin + 1;
 		prn(CSI "%dC", margin - 1);
 		if (y == h) yorig--;
@@ -126,6 +130,11 @@ int main() {
 	if (src == NULL) err(1, "malloc");
 	src_l = -1;
 
+	breaks = malloc(src_s * sizeof(int));
+	if (breaks == NULL) err(1, "malloc");
+	for (i = 0; i < src_s; i++)
+		breaks[i] = 0;
+
 	ttyfd = open("/dev/tty", O_RDWR);
 	if (ttyfd == -1) rerr(1, "open");
 
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