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* lib.h (struct cobj_ops): New function pointer, clone.
(cobj_ops_init, cobj_ops_init_ex): Add clone argument to macros.
* lib.c (seq_iter_cobj_ops): Use copy_iter as the clone operation.
(cptr_ops): Use copy_cptr as clone operation.
(copy): Replace if statements by check whether COBJ has a clone
operation. If so, we use it to copy the object.
* struct.h (enum special_slot): New member, copy_m.
* struct.c (copy_s): New symbol variable.
(special_sym): Associate copy_m enum value with copy symbol.
(struct_init): Initialize copy_s with interned symbol.
(struct_inst_clone): New static function.
(struct_type_ops): Specify no clone operation via null pointer.
(struct_inst_ops): Specify struct_inst_clone as clone
operation.
* arith.c (psq_ops): Indicate no clone operation via null pointer.
* buf.c (buf_strm_ops): Likewise.
* chksum.c (sha1_ops, sha256_ops, md5_ops): Likewise.
* ffi.c (ffi_type_builtin_ops, ffi_type_struct_ops,
ffi_type_ptr_ops, ffi_type_enum_ops, ffi_closure_ops,
union_ops): Likewise.
(carray_borrowed_ops, carry_owned_ops, carray_mmap_ops):
Specify copy_carray as clone operation.
* gc.c (prot_array_ops): Indicate no clone operation via
null pointer.
* gzip.c (gzio_ops_rd, gzip_ops_wr): Likewise.
* hash.c (hash_iter_ops): Likewise.
(hash_ops): Specify copy_hash as clone operation.
* parser.c (parser_ops): Indicate no clone operation via
null pointer.
* rand.c (random_state_clone): New static function.
(random_state_ops): Use random_state_clone as clone function.
* regex.c (char_set_obj_ops, regex_obj_ops): Indicate no clone
operation via null pointer.
* socket.c (dgram_strm_ops): Likewise.
* stream.c (null-ops, stdio_ops, tail_ops, pipe_ops,
dir_ops, string_in_ops, byte_in_ops, strlist_in_ops,
string_out_ops, strlist_out_ops, cat_stream_ops,
record_adapter_ops): Likewise.
* strudel.c (strudel_ops): Likewise.
* sysif.c (cptr_dl_ops, opendir_ops): Likewise.
* syslog.c (syslog_strm_ops): Likewise.
* unwind.c (cont_ops): Likewise.
* vm.c (vm_desc_ops, vm_closure_ops): Likewise.
* tree.c (tree_ops): Use copy_search_tree for clone
operation.
(tree_iter_ops): Use copy_tree_iter for clone operation.
* genchksum.txr: Changes in chksum.c specified in one
place here.
* tests/012/oop.tl: Couple of new tests.
* txr.1: Documented.
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* genchksum.txr, chksum.c: The declarations of the symbol
variables, COBJ class handles, and most of the chksum_init
function is also generated now. A comment is added explaining
what parts of the file are generated, and what parts are
scraped, and giving some advice to the maintainer.
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A giant macro that generates numerous functions and variables
is hell for anyone who has to debug the code. The right
approach is external code generation, where the result is
a clean source file that is checked into the repository.
* genchksum.txr: New file.
* chksum.c: Now generated.
(chksum_impl): Macro and its invocations removed.
(sha1_stream_impl, sha1_stream, sha1_szmax_upd,
sha1_buf, sha1_str, sha1, sha1_ops,
sha1_begin,
sha1_utf8_byte_callback, sha1_hash,
sha1_end): These are directly defined again.
(sha256_stream_impl, sha256_stream, sha256_szmax_upd,
sha256_buf, sha256_str, sha256, sha256_ops,
sha256_begin,
sha256_utf8_byte_callback, sha256_hash,
sha256_end): Likewise.
generated by macro.
md5_stream_impl, md5_stream,
md5_szmax_upd,
md5_buf, md5_str, md5, md5_ops,
md5_begin,
md5_utf8_byte_callback, md5_hash,
md5_end): Likewise.
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