-struct GTY(()) def_pragma_macro_value {
- struct def_pragma_macro_value *prev;
- cpp_macro *value;
-};
-
-struct GTY(()) def_pragma_macro {
- hashval_t hash;
- const char *name;
- struct def_pragma_macro_value value;
-};
-
-static GTY((param_is (struct def_pragma_macro))) htab_t pushed_macro_table;
-
-#ifdef HANDLE_PRAGMA_PUSH_POP_MACRO
-/* Hash table control functions for pushed_macro_table. */
-static hashval_t
-dpm_hash (const void *p)
-{
- return ((const struct def_pragma_macro *)p)->hash;
-}
-
-static int
-dpm_eq (const void *pa, const void *pb)
-{
- const struct def_pragma_macro *const a = (const struct def_pragma_macro *) pa,
- *const b = (const struct def_pragma_macro *) pb;
- return a->hash == b->hash && strcmp (a->name, b->name) == 0;
-}
-
-/* #pragma push_macro("MACRO_NAME")
- #pragma pop_macro("MACRO_NAME") */
-
-static void
-handle_pragma_push_macro (cpp_reader *reader)
-{
- tree x, id = 0;
- enum cpp_ttype token;
- struct def_pragma_macro dummy, *c;
- const char *macroname;
- void **slot;
-
- if (pragma_lex (&x) != CPP_OPEN_PAREN)
- GCC_BAD ("missing %<(%> after %<#pragma push_macro%> - ignored");
-
- token = pragma_lex (&id);
-
- /* Silently ignore */
- if (token == CPP_CLOSE_PAREN)
- return;
- if (token != CPP_STRING)
- GCC_BAD ("invalid constant in %<#pragma push_macro%> - ignored");
-
- if (pragma_lex (&x) != CPP_CLOSE_PAREN)
- GCC_BAD ("missing %<)%> after %<#pragma push_macro%> - ignored");
-
- if (pragma_lex (&x) != CPP_EOF)
- warning (OPT_Wpragmas, "junk at end of %<#pragma push_macro%>");
-
- /* Check for empty string, and silently ignore. */
- if (TREE_STRING_LENGTH (id) < 1)
- return;
- macroname = TREE_STRING_POINTER (id);
-
- if (pushed_macro_table == NULL)
- pushed_macro_table = htab_create_ggc (15, dpm_hash, dpm_eq, 0);
-
- dummy.hash = htab_hash_string (macroname);
- dummy.name = macroname;
- slot = htab_find_slot_with_hash (pushed_macro_table, &dummy,
- dummy.hash, INSERT);
- c = (struct def_pragma_macro *) *slot;
- if (c == NULL)
- {
- *slot = c = GGC_NEW (struct def_pragma_macro);
- c->hash = dummy.hash;
- c->name = ggc_alloc_string (macroname, TREE_STRING_LENGTH (id) - 1);
- c->value.prev = NULL;
- }
- else
- {
- struct def_pragma_macro_value *v;
- v = GGC_NEW (struct def_pragma_macro_value);
- *v = c->value;
- c->value.prev = v;
- }
-
- c->value.value = cpp_push_definition (reader, macroname);
-}
-
-static void
-handle_pragma_pop_macro (cpp_reader *reader)
-{
- tree x, id = 0;
- enum cpp_ttype token;
- struct def_pragma_macro dummy, *c;
- const char *macroname;
- void **slot = NULL;
-
- if (pragma_lex (&x) != CPP_OPEN_PAREN)
- GCC_BAD ("missing %<(%> after %<#pragma pop_macro%> - ignored");
-
- token = pragma_lex (&id);
-
- /* Silently ignore */
- if (token == CPP_CLOSE_PAREN)
- return;
- if (token != CPP_STRING)
- GCC_BAD ("invalid constant in %<#pragma pop_macro%> - ignored");
-
- if (pragma_lex (&x) != CPP_CLOSE_PAREN)
- GCC_BAD ("missing %<)%> after %<#pragma pop_macro%> - ignored");
-
- if (pragma_lex (&x) != CPP_EOF)
- warning (OPT_Wpragmas, "junk at end of %<#pragma pop_macro%>");
-
- /* Check for empty string, and silently ignore. */
- if (TREE_STRING_LENGTH (id) < 1)
- return;
- macroname = TREE_STRING_POINTER (id);
-
- dummy.hash = htab_hash_string (macroname);
- dummy.name = macroname;
- if (pushed_macro_table)
- slot = htab_find_slot_with_hash (pushed_macro_table, &dummy,
- dummy.hash, NO_INSERT);
- if (slot == NULL)
- return;
- c = (struct def_pragma_macro *) *slot;
-
- cpp_pop_definition (reader, c->name, c->value.value);
-
- if (c->value.prev)
- c->value = *c->value.prev;
- else
- htab_clear_slot (pushed_macro_table, slot);
-}
-#endif /* HANDLE_PRAGMA_PUSH_POP_MACRO */
-