[PATCH v3 1/9] chardev: add cols, rows fields

[Szymon Lukasz]

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

Signed-off-by: Szymon Lukasz <noh4hss@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 f3530a90e6..27f95bfcdf 100644
--- a/chardev/char-fe.c
+++ b/chardev/char-fe.c
@@ -336,6 +336,19 @@ 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, int fe_open)
 {
     Chardev *chr = be->chr;
diff --git a/include/chardev/char-fe.h b/include/chardev/char-fe.h
index a553843364..3672b0d97d 100644
--- a/include/chardev/char-fe.h
+++ b/include/chardev/char-fe.h
@@ -154,6 +154,16 @@ 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:
  *
diff --git a/include/chardev/char.h b/include/chardev/char.h
index 00589a6025..0cea33cb9a 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;
     GSource *gsource;
     GMainContext *gcontext;
     DECLARE_BITMAP(features, QEMU_CHAR_FEATURE_LAST);
-- 
2.27.0