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* cpphash.h (POOL_ALIGN, POOL_FRONT, POOL_LIMIT, POOL_BASE, POOL_SIZE, POOL_ROOM, POOL_COMMIT, struct cpp_chunk, struct cpp_pool, _cpp_init_pool, _cpp_free_pool, _cpp_pool_reserve, _cpp_pool_alloc, _cpp_next_chunk): Remove. (_cpp_extend_buff, BUFF_ROOM): Update. (_cpp_append_extend_buff): New. (struct cpp_reader): Remove macro_pool, add a_buff. * cppinit.c (cpp_create_reader): Initialize a_buff, instead of macro_pool. (cpp_destroy): Free a_buff instead of macro_pool. * cpplex.c (new_chunk, chunk_suitable, _cpp_next_chunk, new_chunk, _cpp_init_pool, _cpp_free_pool, _cpp_pool_reserve, _cpp_pool_alloc, ): Remove. (parse_number, parse_string): Update use of _cpp_extend_buff. (_cpp_extend_buff): Update. (_cpp_append_extend_buff, cpp_aligned_alloc): New. * cpplib.c (glue_header_name, parse_answer): Update use of _cpp_extend_buff. (cpp_register_pragma, cpp_register_pragma_space): Use _cpp_aligned_alloc. (do_assert, do_unassert): Check for EOL, update. * cppmacro.c (stringify_arg, collect_args): Update to use _cpp_extend_buff and _cpp_append_extend_buff. (save_parameter, parse_params, alloc_expansion_token, _cpp_create_definition): Rework memory management. * gcc.dg/cpp/redef2.c: Add test. From-SVN: r45899
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