[binutils-gdb] Use block_enum instead of int for better typesafety

[Christian Biesinger <cbiesinger@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=c32e6a04f42b8e4a1392ee4b87d040c06b917ef5

commit c32e6a04f42b8e4a1392ee4b87d040c06b917ef5
Author: Christian Biesinger <cbiesinger@google.com>
Date:   Thu Jul 11 13:35:13 2019 -0500

    Use block_enum instead of int for better typesafety
    
    gdb/ChangeLog:
    
    2019-07-21  Christian Biesinger  <cbiesinger@google.com>
    
    	* symtab.c (lookup_symbol_in_objfile_symtabs): Change int to block_enum.
    	(lookup_symbol_in_objfile): Change int to block_enum and add a
    	gdb_assert to make sure block_index is GLOBAL_BLOCK or STATIC_BLOCK.

Diff:
---
 gdb/symtab.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/gdb/symtab.c b/gdb/symtab.c
index 719e5b2..ce1cdcf 100644
--- a/gdb/symtab.c
+++ b/gdb/symtab.c
@@ -92,7 +92,8 @@ struct block_symbol lookup_local_symbol (const char *name,
 					 enum language language);
 
 static struct block_symbol
-  lookup_symbol_in_objfile (struct objfile *objfile, int block_index,
+  lookup_symbol_in_objfile (struct objfile *objfile,
+			    enum block_enum block_index,
 			    const char *name, const domain_enum domain);
 
 /* Type of the data stored on the program space.  */
@@ -2244,8 +2245,9 @@ lookup_global_symbol_from_objfile (struct objfile *main_objfile,
    static symbols.  */
 
 static struct block_symbol
-lookup_symbol_in_objfile_symtabs (struct objfile *objfile, int block_index,
-				  const char *name, const domain_enum domain)
+lookup_symbol_in_objfile_symtabs (struct objfile *objfile,
+				  enum block_enum block_index, const char *name,
+				  const domain_enum domain)
 {
   gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK);
 
@@ -2516,11 +2518,13 @@ lookup_symbol_in_static_block (const char *name,
    BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK.  */
 
 static struct block_symbol
-lookup_symbol_in_objfile (struct objfile *objfile, int block_index,
+lookup_symbol_in_objfile (struct objfile *objfile, enum block_enum block_index,
 			  const char *name, const domain_enum domain)
 {
   struct block_symbol result;
 
+  gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK);
+
   if (symbol_lookup_debug)
     {
       fprintf_unfiltered (gdb_stdlog,