[PATCH v8 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>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
[Filip: CharBackend -> CharFrontend]
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 a44f267373..c61c91f779 100644
--- a/chardev/char-fe.c
+++ b/chardev/char-fe.c
@@ -329,6 +329,19 @@ void qemu_chr_fe_set_echo(CharFrontend *c, bool echo)
     }
 }
 
+void qemu_chr_fe_get_winsize(CharFrontend *c, uint16_t *cols, uint16_t *rows)
+{
+    Chardev *chr = c->chr;
+
+    if (chr) {
+        *cols = chr->cols;
+        *rows = chr->rows;
+    } else {
+        *cols = 0;
+        *rows = 0;
+    }
+}
+
 void qemu_chr_fe_set_open(CharFrontend *c, bool is_open)
 {
     Chardev *chr = c->chr;
diff --git a/include/chardev/char-fe.h b/include/chardev/char-fe.h
index a82894e1d5..e4a3801e7d 100644
--- a/include/chardev/char-fe.h
+++ b/include/chardev/char-fe.h
@@ -168,6 +168,16 @@ int qemu_chr_fe_wait_connected(CharFrontend *c, Error **errp);
  */
 void qemu_chr_fe_set_echo(CharFrontend *c, 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(CharFrontend *c, uint16_t *cols, uint16_t *rows);
+
 /**
  * qemu_chr_fe_set_open:
  * @c: a CharFrontend
diff --git a/include/chardev/char.h b/include/chardev/char.h
index 7377d8e60a..6394ec2ffe 100644
--- a/include/chardev/char.h
+++ b/include/chardev/char.h
@@ -66,6 +66,7 @@ struct Chardev {
     bool logtimestamp;
     bool log_line_start;
     int be_open;
+    uint16_t cols, rows;
     /* used to coordinate the chardev-change special-case: */
     bool handover_yank_instance;
     GSource *gsource;

-- 
2.55.0