1 files changed, 68 insertions, 0 deletions
diff --git a/gdbsupport/buffer.h b/gdbsupport/buffer.h
new file mode 100644
index 00000000000..6e4c16799d0
--- /dev/null
+++ b/gdbsupport/buffer.h
@@ -0,0 +1,68 @@
+/* A simple growing buffer for GDB.
+  
+   Copyright (C) 2009-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef COMMON_BUFFER_H
+#define COMMON_BUFFER_H
+
+struct buffer
+{
+  char *buffer;
+  size_t buffer_size; /* allocated size */
+  size_t used_size; /* actually used size */
+};
+
+/* Append DATA of size SIZE to the end of BUFFER.  Grows the buffer to
+   accommodate the new data.  */
+void buffer_grow (struct buffer *buffer, const char *data, size_t size);
+
+/* Append C to the end of BUFFER.  Grows the buffer to accommodate the
+   new data.  */
+
+static inline void
+buffer_grow_char (struct buffer *buffer, char c)
+{
+  buffer_grow (buffer, &c, 1);
+}
+
+/* Release any memory held by BUFFER.  */
+void buffer_free (struct buffer *buffer);
+
+/* Initialize BUFFER.  BUFFER holds no memory afterwards.  */
+void buffer_init (struct buffer *buffer);
+
+/* Return a pointer into BUFFER data, effectively transferring
+   ownership of the buffer memory to the caller.  Calling buffer_free
+   afterwards has no effect on the returned data.  */
+char* buffer_finish (struct buffer *buffer);
+
+/* Simple printf to buffer function.  Current implemented formatters:
+   %s - grow an xml escaped text in BUFFER.
+   %d - grow an signed integer in BUFFER.
+   %u - grow an unsigned integer in BUFFER.
+   %x - grow an unsigned integer formatted in hexadecimal in BUFFER.
+   %o - grow an unsigned integer formatted in octal in BUFFER.  */
+void buffer_xml_printf (struct buffer *buffer, const char *format, ...)
+  ATTRIBUTE_PRINTF (2, 3);
+
+#define buffer_grow_str(BUFFER,STRING)		\
+  buffer_grow (BUFFER, STRING, strlen (STRING))
+#define buffer_grow_str0(BUFFER,STRING)			\
+  buffer_grow (BUFFER, STRING, strlen (STRING) + 1)
+
+#endif /* COMMON_BUFFER_H */