build: rename all symbols to use sysprof_ as prefix

As we gain in usage, we need to be more careful about using a prefix
that will not collide with other symbols. So version 3 of our ABI will
change to using Sysprof/SYSPROF/sysprof as the various prefixes.

The soname/api version bump will happen later on this branch so that
things are easier to test up until then.

src/libsysprof/sysprof-line-reader.h

@@ -0,0 +1,40 @@
+/* sysprof-line-reader.h
+ *
+ * Copyright 2015-2019 Christian Hergert <christian@hergert.me>
+ *
+ * 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/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+typedef struct _SysprofLineReader SysprofLineReader;
+
+G_GNUC_INTERNAL
+SysprofLineReader *sysprof_line_reader_new  (const gchar   *contents,
+                                   gssize         length);
+G_GNUC_INTERNAL
+void          sysprof_line_reader_free (SysprofLineReader  *self);
+G_GNUC_INTERNAL
+const gchar  *sysprof_line_reader_next (SysprofLineReader  *self,
+                                   gsize         *length);
+
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SysprofLineReader, sysprof_line_reader_free)
+
+G_END_DECLS