MINOR: buffer: make b_getblk_nc() take const pointers
Now that there are no more users requiring to modify the buffer anymore,
switch these ones to const char and const buffer. This will make it more
obvious next time send functions are tempted to modify the buffer's output
count. Minor adaptations were necessary at a few call places which were
using char due to the function's previous prototype.
diff --git a/include/common/buf.h b/include/common/buf.h
index be196f1..488c406 100644
--- a/include/common/buf.h
+++ b/include/common/buf.h
@@ -352,7 +352,7 @@
* =0 : not enough data available. <blk*> are left undefined.
* The buffer is left unaffected. Unused buffers are left in an undefined state.
*/
-static inline size_t b_getblk_nc(struct buffer *buf, char **blk1, int *len1, char **blk2, int *len2, size_t ofs, size_t max)
+static inline size_t b_getblk_nc(const struct buffer *buf, const char **blk1, int *len1, const char **blk2, int *len2, size_t ofs, size_t max)
{
size_t l1;