Re: [PATCH 1/5] common: constify some declarations

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On 01/27/2016 06:09 PM, Frediano Ziglio wrote:
Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
---
  common/log.c        | 2 +-
  common/marshaller.c | 7 +++++--
  common/marshaller.h | 2 +-
  3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/common/log.c b/common/log.c
index 607aa82..a9bbebc 100644
--- a/common/log.c
+++ b/common/log.c
@@ -43,7 +43,7 @@ static int abort_level = -1;

  static GLogLevelFlags spice_log_level_to_glib(SpiceLogLevel level)
  {
-    static GLogLevelFlags glib_levels[] = {
+    static const GLogLevelFlags glib_levels[] = {
          [ SPICE_LOG_LEVEL_ERROR ] = G_LOG_LEVEL_ERROR,
          [ SPICE_LOG_LEVEL_CRITICAL ] = G_LOG_LEVEL_CRITICAL,
          [ SPICE_LOG_LEVEL_WARNING ] = G_LOG_LEVEL_WARNING,
diff --git a/common/marshaller.c b/common/marshaller.c
index c967371..c1d208e 100644
--- a/common/marshaller.c
+++ b/common/marshaller.c
@@ -347,9 +347,12 @@ uint8_t *spice_marshaller_add(SpiceMarshaller *m, const uint8_t *data, size_t si
      return ptr;
  }

-uint8_t *spice_marshaller_add_ref(SpiceMarshaller *m, uint8_t *data, size_t size)
+uint8_t *spice_marshaller_add_ref(SpiceMarshaller *m, const uint8_t *data, size_t size)
  {
-    return spice_marshaller_add_ref_full(m, data, size, NULL, NULL);
+    /* the cast to no-const here is safe as data is used for writing only if
+     * free_data pointer is not NULL
+     */
+    return spice_marshaller_add_ref_full(m, (uint8_t *) data, size, NULL, NULL);
  }

Hi Frediano,

Isn't there a potential problem with data being returned as non-const ?
I see currently no caller looks at the data returned.

Regards,
    Uri.



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