[sysprof] libsysprof-capture: add sysprof_capture_reader_find_file()

[Christian Hergert <chergert src gnome org>]

commit 7743a047b6cfcdbf1f2fe45987f9672da4eb2c2c
Author: Christian Hergert <chergert redhat com>
Date:   Tue May 28 22:46:50 2019 -0700

    libsysprof-capture: add sysprof_capture_reader_find_file()

 src/libsysprof-capture/sysprof-capture-reader.c | 31 +++++++++++++++++++++++++
 src/libsysprof-capture/sysprof-capture-reader.h |  3 +++
 2 files changed, 34 insertions(+)
---
diff --git a/src/libsysprof-capture/sysprof-capture-reader.c b/src/libsysprof-capture/sysprof-capture-reader.c
index 567db71..1a1fa7a 100644
--- a/src/libsysprof-capture/sysprof-capture-reader.c
+++ b/src/libsysprof-capture/sysprof-capture-reader.c
@@ -1285,3 +1285,34 @@ sysprof_capture_reader_get_byte_order (SysprofCaptureReader *self)
 
   return self->endian;
 }
+
+const SysprofCaptureFileChunk *
+sysprof_capture_reader_find_file (SysprofCaptureReader *self,
+                                  const gchar          *path)
+{
+  SysprofCaptureFrameType type;
+
+  g_return_val_if_fail (self != NULL, NULL);
+  g_return_val_if_fail (path != NULL, NULL);
+
+  while (sysprof_capture_reader_peek_type (self, &type))
+    {
+      if (type == SYSPROF_CAPTURE_FRAME_FILE_CHUNK)
+        {
+          const SysprofCaptureFileChunk *fc;
+
+          if (!(fc = sysprof_capture_reader_read_file (self)))
+            break;
+
+          if (g_strcmp0 (path, fc->path) == 0)
+            return fc;
+
+          continue;
+        }
+
+      if (!sysprof_capture_reader_skip (self))
+        break;
+    }
+
+  return NULL;
+}
diff --git a/src/libsysprof-capture/sysprof-capture-reader.h b/src/libsysprof-capture/sysprof-capture-reader.h
index 49b3071..c963b6f 100644
--- a/src/libsysprof-capture/sysprof-capture-reader.h
+++ b/src/libsysprof-capture/sysprof-capture-reader.h
@@ -100,6 +100,9 @@ SYSPROF_AVAILABLE_IN_ALL
 void                                    sysprof_capture_reader_set_stat            (SysprofCaptureReader     
*self,
                                                                                     const SysprofCaptureStat 
*st_buf);
 SYSPROF_AVAILABLE_IN_ALL
+const SysprofCaptureFileChunk          *sysprof_capture_reader_find_file           (SysprofCaptureReader     
*self,
+                                                                                    const gchar              
*path);
+SYSPROF_AVAILABLE_IN_ALL
 gchar                                 **sysprof_capture_reader_list_files          (SysprofCaptureReader     
*self);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean                                sysprof_capture_reader_read_file_fd        (SysprofCaptureReader     
*self,