[PATCH RFC v5 01/12] chardev: add cols, rows fields

[Filip Hejsek <filip.hejsek@gmail.com>]

From: Szymon Lukasz <noh4hss@gmail.com>

These fields should be interpreted as the size of the terminal connected
to a given chardev.

Signed-off-by: Szymon Lukasz <noh4hss@gmail.com>
Signed-off-by: Filip Hejsek <filip.hejsek@gmail.com>
---
 chardev/char-fe.c         | 13 +++++++++++++
 include/chardev/char-fe.h | 10 ++++++++++
 include/chardev/char.h    |  1 +
 3 files changed, 24 insertions(+)

diff --git a/chardev/char-fe.c b/chardev/char-fe.c
index 158a5f4f551ee49120eee6ebdf772fb450739f47..8622898bd414c208b5a0397b439e18a8bf0b8a92 100644
--- a/chardev/char-fe.c
+++ b/chardev/char-fe.c
@@ -329,6 +329,19 @@ void qemu_chr_fe_set_echo(CharBackend *be, bool echo)
     }
 }
 
+void qemu_chr_fe_get_winsize(CharBackend *be, uint16_t *cols, uint16_t *rows)
+{
+    Chardev *chr = be->chr;
+
+    if (chr) {
+        *cols = chr->cols;
+        *rows = chr->rows;
+    } else {
+        *cols = 0;
+        *rows = 0;
+    }
+}
+
 void qemu_chr_fe_set_open(CharBackend *be, bool is_open)
 {
     Chardev *chr = be->chr;
diff --git a/include/chardev/char-fe.h b/include/chardev/char-fe.h
index 8ef05b3dd095bdcaa51b10482261a29b1e8233c7..02d5606fa343ac64a76f48dcd250b5431a0a7761 100644
--- a/include/chardev/char-fe.h
+++ b/include/chardev/char-fe.h
@@ -158,6 +158,16 @@ int qemu_chr_fe_wait_connected(CharBackend *be, Error **errp);
  */
 void qemu_chr_fe_set_echo(CharBackend *be, bool echo);
 
+/**
+ * qemu_chr_fe_get_winsize:
+ * @cols: the address for storing columns
+ * @rows: the address for storing rows
+ *
+ * Get the size of the terminal connected to the chardev backend.
+ * Returns *cols = *rows = 0, if no associated Chardev.
+ */
+void qemu_chr_fe_get_winsize(CharBackend *be, uint16_t *cols, uint16_t *rows);
+
 /**
  * qemu_chr_fe_set_open:
  * @be: a CharBackend
diff --git a/include/chardev/char.h b/include/chardev/char.h
index 429852f8d9d3c5a7e061acea3561b019b15d658f..336b2e68d099e70a9abe71ef842b160bf12ea932 100644
--- a/include/chardev/char.h
+++ b/include/chardev/char.h
@@ -65,6 +65,7 @@ struct Chardev {
     char *filename;
     int logfd;
     int be_open;
+    uint16_t cols, rows;
     /* used to coordinate the chardev-change special-case: */
     bool handover_yank_instance;
     GSource *gsource;

-- 
2.51.0