+/* A default version of lookup_symbol_nonlocal for use by languages
+ that can't think of anything better to do. This implements the C
+ lookup rules. */
+
+struct symbol *
+basic_lookup_symbol_nonlocal (const char *name,
+ const char *linkage_name,
+ const struct block *block,
+ const domain_enum domain,
+ struct symtab **symtab)
+{
+ struct symbol *sym;
+
+ /* NOTE: carlton/2003-05-19: The comments below were written when
+ this (or what turned into this) was part of lookup_symbol_aux;
+ I'm much less worried about these questions now, since these
+ decisions have turned out well, but I leave these comments here
+ for posterity. */
+
+ /* NOTE: carlton/2002-12-05: There is a question as to whether or
+ not it would be appropriate to search the current global block
+ here as well. (That's what this code used to do before the
+ is_a_field_of_this check was moved up.) On the one hand, it's
+ redundant with the lookup_symbol_aux_symtabs search that happens
+ next. On the other hand, if decode_line_1 is passed an argument
+ like filename:var, then the user presumably wants 'var' to be
+ searched for in filename. On the third hand, there shouldn't be
+ multiple global variables all of which are named 'var', and it's
+ not like decode_line_1 has ever restricted its search to only
+ global variables in a single filename. All in all, only
+ searching the static block here seems best: it's correct and it's
+ cleanest. */
+
+ /* NOTE: carlton/2002-12-05: There's also a possible performance
+ issue here: if you usually search for global symbols in the
+ current file, then it would be slightly better to search the
+ current global block before searching all the symtabs. But there
+ are other factors that have a much greater effect on performance
+ than that one, so I don't think we should worry about that for
+ now. */
+
+ sym = lookup_symbol_static (name, linkage_name, block, domain, symtab);
+ if (sym != NULL)
+ return sym;
+
+ return lookup_symbol_global (name, linkage_name, domain, symtab);
+}
+
+/* Lookup a symbol in the static block associated to BLOCK, if there
+ is one; do nothing if BLOCK is NULL or a global block. */
+
+struct symbol *
+lookup_symbol_static (const char *name,
+ const char *linkage_name,
+ const struct block *block,
+ const domain_enum domain,
+ struct symtab **symtab)
+{
+ const struct block *static_block = block_static_block (block);
+
+ if (static_block != NULL)
+ return lookup_symbol_aux_block (name, linkage_name, static_block,
+ domain, symtab);
+ else
+ return NULL;
+}
+
+/* Lookup a symbol in all files' global blocks (searching psymtabs if
+ necessary). */
+
+struct symbol *
+lookup_symbol_global (const char *name,
+ const char *linkage_name,
+ const domain_enum domain,
+ struct symtab **symtab)
+{
+ struct symbol *sym;
+
+ sym = lookup_symbol_aux_symtabs (GLOBAL_BLOCK, name, linkage_name,
+ domain, symtab);
+ if (sym != NULL)
+ return sym;
+
+ return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK, name, linkage_name,
+ domain, symtab);
+}
+