*** empty log message ***

[bpt/guile.git] / libguile / ChangeLog

2001-07-29  Marius Vollmer  <mvo@zagadka.ping.de>

	Removed vcell slot from structs.
	
	* struct.h (scm_vtable_index_vcell): Removed.  Renumbered
	subsequent indices.

	* struct.c (scm_struct_vtable_p): Do not check vcell slot for
	zero.  Use scm_vtable_index_layout instead of "0" when accessing
	said slot.
	(scm_init_struct): Remove vcell slot layout code from
	required_vtable_fields.

	* objects.h (scm_si_redefined, scm_si_hashsets): Renumbered.

	* goops.c (build_class_class_slots): Removed vcell slot
	definition.

	* goops.h: Renumbered slot indices. (SCM_CLASS_CLASS_LAYOUT):
	Removed vcell slot layout code.
	(scm_si_vcell): Removed.

2001-07-26  Marius Vollmer  <mvo@zagadka.ping.de>

	"Glocs" have been removed.
	
	* tags.h: Update tag system docs.
	(scm_tc3_cons_gloc): Renamed to scm_tc3_struct.  Changed all uses.
	(scm_tcs_cons_gloc): Renamed to scm_tcs_struct.  Changed all uses.
	(SCM_ECONSP, SCM_NECONSP): Removed.  Changed all uses to SCM_CONSP
	or SCM_NCONSP, respectively.

	* struct.c, struct.h, srcprop.c, procs.c, procprop.c, print.c,
	objects.c. modules.c, goops.c, eval.c, debug.c: Changed all uses
	of scm_tc3_cond_gloc and scm_tcs_cons_gloc.  See above.

	* print.c (scm_iprin1): Remove printing of glocs.  Do not try to
	tell glocs from structs.
	
	* gc.c (scm_gc_mark, scm_gc_sweep): Remove handling of glocs.

	* eval.c (scm_m_atbind): Make a list of variables, not glocs.
	(scm_ceval, scm_deval): For SCM_IM_BIND, fiddle with variables
	instead of with glocs.
	(EVALCAR): Do not test for glocs.
	(scm_lookupcar, scm_lookupcar1): Do not handle glocs in race
	condition.
	(scm_unmemocar): Do not handle glocs.
	(scm_m_atfop): Memoize as a variable, not as a gloc.
	(scm_eval_args, scm_deval_args): Do not handle glocs.
	(scm_ceval, scm_deval): Likewise.
	
	* eval.h (SCM_XEVALCAR): Do not test for glocs.
	(SCM_GLOC_VAR, SCM_GLOC_VAL, SCM_GLOC_SET_VAL, SCM_GLOC_VAL_LOC):
	Removed.

	* debug.h, debug.c (scm_make_gloc, scm_gloc_p): Removed.

	* dynwind.c (scm_swap_bindings): Likewise.
	(scm_dowinds): Updated to recognize lists of variables instead of
	lists of glocs.

	* __scm.h (SCM_CAUTIOS, SCM_RECKLESS): Update comments.

	
	* gc_os_dep.c (GC_noop1): Moved into the same #if/#endif context
	where it is needed.
	
2001-07-25  Gary Houston  <ghouston@arglist.com>

	* numbers.c (scm_logand, scm_logior, scm_logxor): adjusted the
	docstrings to reflect the n-ary implementation.

2001-07-26  Marius Vollmer  <mvo@zagadka.ping.de>

	* eval.c (scm_ceval, scm_deval): Use "RETURN" macro when returning
	value of a variable, not the plain "return" statement.

2001-07-25  Marius Vollmer  <mvo@zagadka.ping.de>

	* eval.c: Allow variables in memoized code (in addition to glocs).
	(scm_lookupcar): Handle variables in lost races.  Replace symbol
	with variable directly, do not make a gloc.
	(scm_unmemocar): Rewrite variables using a reverse lookup, just
	like glocs.
	(scm_ceval, scm_deval): Deal with variables in SCM_IM_SET and in
	the main switch.

2001-07-25  Marius Vollmer  <marius.vollmer@uni-dortmund.de>

	* variable.c (scm_i_variable_print): Use "value" instead of
	"binding" since a binding is the mapping between symbols and
	variables, not between variables and their values.

	* tags.h (scm_tc7_variable): New.
	* gc.c (scm_gc_mark): Handle scm_tc7_variable objects.
	* print.c (scm_iprin1): Likewise.

	* variable.h (scm_tc16_variable): Removed.
	(SCM_VARIABLEP): Test for new tc7 code.
	(scm_i_variable_print): New.
	* variable.c (scm_tc16_variable): Removed.
	(variable_print): Renamed to scm_i_variable_print and made
	non-static.
	(variable_equal_p): Removed.
	(make_variable): Construct a tc7 object instead of a smob.
	(scm_init_variable): Do not register smob.
	
2001-07-22  Marius Vollmer  <mvo@zagadka.ping.de>

	* tags.h: Include inttypes.h when we have it.

2001-07-13  Marius Vollmer  <mvo@zagadka.ping.de>

	* tags.h (SCM_UNBOUND): Make it the 34th isym/iflag, the 33th slot
	is taken by the new SCM_IM_CALL_WITH_VALUES.
	* print.c (scm_isymnames): Update table accordingly.
	
2001-07-22  Gary Houston  <ghouston@arglist.com>

	* regex-posix.c (s_scm_regexp_exec): use scm_long2num not
	SCM_MAKINUM to convert regoff_t value to SCM.

2001-07-21  Gary Houston  <ghouston@arglist.com>

	* scmsigs.c: include sys/time.h for itimer stuff.

2001-07-19  Rob Browning  <rlb@defaultvalue.org>

	* gc_os_dep.c (GC_noop1): ifdef out (unused) to quiet warning.

	* c-tokenize.lex: add option %nounput to quiet warning.
	Add prototype for yylex to quiet warning.

	* scmconfig.h.in: add flags for setitimer and getitimer.

	* scmsigs.h (scm_init_scmsigs): new prototype.
	(scm_init_scmsigs): new prototype.

	* scmsigs.c (s_scm_setitimer): new function.
	(s_scm_setitimer): new function.

2001-07-18  Martin Grabmueller  <mgrabmue@cs.tu-berlin.de>

	* alist.c, arbiters.c, async.h, backtrace.h, boolean.c, chars.c,
	chars.h, continuations.h, debug-malloc.h, dynl.c, feature.c,
	feature.h, filesys.h, fluids.h, fports.h, gc_os_dep.c,
	gdb_interface.h, gh_eval.c, gh_funcs.c, gh_io.c, gh_list.c,
	gh_predicates.c, gsubr.c, gsubr.h, guardians.h,
	guile-func-name-check.in, guile-snarf-docs-texi.in,
	guile-snarf-docs.in, guile-snarf.awk.in, guile-snarf.in,
	hashtab.h, iselect.h, keywords.h, lang.c, list.h, load.h,
	objprop.c, objprop.h, options.c, options.h, random.h,
	regex-posix.h, root.c, root.h, script.c, snarf.h, stackchk.c,
	strerror.c, strop.h, strports.h, threads.h, values.c, values.h,
	version.c, version.h: Updated copyright notice.

2001-07-17  Dirk Herrmann  <D.Herrmann@tu-bs.de>

	* goops.c (sym_layout, sym_vcell, sym_vtable, sym_print,
	sym_procedure, sym_setter, sym_redefined, sym_h0, sym_h1, sym_h2,
	sym_h3, sym_h4, sym_h5, sym_h6, sym_h7, sym_name,
	sym_direct_supers, sym_direct_slots, sym_direct_subclasses,
	sym_direct_methods, sym_cpl, sym_default_slot_definition_class,
	sym_slots, sym_getters_n_setters, sym_keyword_access, sym_nfields,
	sym_environment, scm_sym_change_class):  New static variables to
	hold predefined symbols.

	(build_class_class_slots):  Build the list using scm_list_n
	instead of cons.  Also, slots are already created as lists, thus
	making a call to maplist unnecessary.

	(scm_class_name, scm_class_direct_supers, scm_class_direct_slots,
	scm_class_direct_subclasses, scm_class_direct_methods,
	scm_class_precedence_list, scm_class_slots, scm_class_environment,
	scm_method_procedure, create_standard_classes, purgatory):  Use
	predefined symbols.

	(build_slots_list, compute_getters_n_setters,
	scm_sys_initialize_object, scm_sys_inherit_magic_x,
	get_slot_value_using_name, set_slot_value_using_name,
	scm_sys_invalidate_method_cache_x, scm_generic_capability_p,
	scm_compute_applicable_methods, scm_sys_method_more_specific_p,
	make_struct_class):  Prefer !SCM_<pred> over SCM_N<pred>.

	(scm_sys_prep_layout_x):  Minimize variable scopes.

	(scm_sys_prep_layout_x, scm_sys_fast_slot_ref,
	scm_sys_fast_slot_set_x):  Fix signedness.

	(go_to_hell, go_to_heaven, purgatory, scm_change_object_class,
	lock_cache_mutex, unlock_cache_mutex, call_memoize_method,
	scm_memoize_method, scm_wrap_object):  Use packing and unpacking
	when converting to and from SCM values.

	(scm_enable_primitive_generic_x):  Add rest argument checking.

	(map, filter_cpl, maplist, scm_sys_initialize_object,
	scm_sys_prep_layout_x, slot_definition_using_name,
	scm_enable_primitive_generic_x, scm_compute_applicable_methods,
	call_memoize_method, scm_make, scm_make_class):  Prefer explicit
	predicates over SCM_N?IMP tests.

	(scm_sys_prep_layout_x):  Fix typo in error message.  Fix type
	checking.

	(burnin, go_to_hell):  Use SCM_STRUCT_DATA instead of the SCM_INST
	alias.

2001-07-16  Dirk Herrmann  <D.Herrmann@tu-bs.de>

	* fports.c (fport_print):  Don't use SCM_C[AD]R for non pairs.

	* num2integral.i.c (INTEGRAL2NUM, INTEGRAL2BIG):  Fix signedness.

	* symbols-deprecated.c (scm_gentemp):  Simplify vector test.

	* vectors.c (scm_vector_p):  Eliminate redundant IMP test.

2001-07-12  Michael Livshin  <mlivshin@bigfoot.com>

	* strings.c (s_scm_string): fix arg position in assert.

2001-07-11  Gary Houston  <ghouston@arglist.com>

	* strports.c (st_write): use memcpy, not strncpy.  thanks to
	Dale P. Smith.

2001-07-09  Thien-Thi Nguyen  <ttn@revel.glug.org>

	* alist.c, alloca.c, arbiters.c, async.c, async.h, backtrace.c,
	boolean.c, chars.c, continuations.c, coop-defs.h, coop-threads.c,
	debug-malloc.h, debug.c, debug.h, dynl.c, dynwind.c, eq.c,
	error.c, eval.c, evalext.c, feature.c, feature.h, filesys.c,
	filesys.h, fluids.c, fluids.h, fports.c, fports.h, gc.c, gc.h,
	gdbint.c, gsubr.c, guardians.c, hash.c, hashtab.c, hooks.c,
	hooks.h, inet_aton.c, init.c, ioext.c, keywords.c, keywords.h,
	lang.c, list.c, load.c, macros.c, mallocs.c, memmove.c, modules.c,
	net_db.c, numbers.c, numbers.h, objects.c, objprop.c, options.c,
	pairs.c, pairs.h, ports.c, ports.h, posix.c, print.c, print.h,
	procprop.c, procs.c, procs.h, properties.c, putenv.c, ramap.c,
	random.c, random.h, read.c, regex-posix.c, regex-posix.h, root.c,
	root.h, scmsigs.c, script.c, simpos.c, smob.c, snarf.h, socket.c,
	sort.c, srcprop.c, srcprop.h, stackchk.c, stacks.c, stacks.h,
	stime.c, strerror.c, strings.c, strings.h, strop.c, strorder.c,
	strports.c, struct.c, struct.h, symbols-deprecated.c, symbols.c,
	symbols.h, tags.h, threads.c, threads.h, throw.c, unif.c, unif.h,
	variable.c, variable.h, vectors.c, vectors.h, version.c, vports.c,
	weaks.c, weaks.h: Remove "face-lift" comment.

2001-07-08  Rob Browning  <rlb@defaultvalue.org>

	* .cvsignore: add stamp-h.in.

2001-07-04  Martin Grabmueller  <mgrabmue@cs.tu-berlin.de>

	* hooks.c (scm_make_hook, scm_add_hook_x),
	(scm_remove_hook_x, scm_reset_hook_x, scm_run_hook): Added return
	value info to the docstrings.

2001-07-03  Martin Grabmueller  <mgrabmue@cs.tu-berlin.de>

	Some more compatibility patches for Windows.

	* posix.c (getlogin): getlogin() implementation for Windows.

	* backtrace.c, ioext.c: Include <stdio.h>.

	* unif.c, script.c, rw.c, error.c: Include <io.h>, if it does
	exist.

	* cpp_sig_symbols.in: Added SIGBREAK.

2001-07-01  Marius Vollmer  <mvo@zagadka.ping.de>

	* strports.c (scm_read_0str, scm_eval_0str): Call
	scm_c_read_string and scm_c_eval_string respectively, not
	themselves.  Thanks to Dale P. Smith!

2001-06-30  Dirk Herrmann  <D.Herrmann@tu-bs.de>

	* unif.c (scm_array_set_x):  The variable args does not
	necessarily have to be a list.  Further, got rid of a redundant
	SCM_NIMP test.

2001-06-30  Dirk Herrmann  <D.Herrmann@tu-bs.de>

	* list.c (SCM_I_CONS):  Make sure the cell type is initialized
	last.

	* gc.c (s_scm_map_free_list, scm_igc, scm_gc_sweep,
	init_heap_seg): Fixed signedness.

	(init_heap_seg):  Replaced strange for-loop with a while loop.

	* weaks.h (WEAKSH, SCM_WEAKS_H):  Rename <foo>H to SCM_<foo>_H.

	(SCM_WVECTP):  Prefer !SCM_<pred> over SCM_N<pred>.

	The following patch adds conservative marking for the elements of
	free or allocated cells.

	* gc.c (allocated_mark, heap_segment):  New static functions.

	(which_seg):  Deleted, since the functionality is now provided by
	function heap_segment.

	(map_free_list):  Use heap_segment instead of which_seg.

	(MARK):  If cell debugging is disabled, mark free cells
	conservatively.

	(scm_mark_locations, scm_cellp):  Extracted the search for the
	heap segment of a SCM value into function heap_segment.

	(scm_init_storage):  Allocated cells must be marked
	conservatively.

	* gc.[ch] (scm_gc_mark_cell_conservatively):  New function.

	The following patch changes the representation of weak vectors to
	double cells instead of using an extension of the vector's
	allocated memory.

	* gc.c (MARK):  Use SCM_SET_WVECT_GC_CHAIN instead of assigning to
	the result of SCM_WVECT_GC_CHAIN.

	(scm_gc_sweep):  Weak vectors don't have extra fields any more.

	* weaks.c (allocate_weak_vector):  New static function.  It does
	not patch any previously created vector object during the
	construction of a weak vector, and thus doesn't need to switch
	off interrupts during vector creation.

	(scm_make_weak_vector, scm_make_weak_key_hash_table,
	scm_make_weak_value_hash_table, scm_make_doubly_weak_hash_table):
	Use allocate_weak_vector to provide the new weak vector object.

	* weaks.h (SCM_WVECT_TYPE, SCM_SET_WVECT_TYPE,
	SCM_SET_WVECT_GC_CHAIN):  New macros.  The weak vector subtype is
	now stored in the double cell.

	(SCM_IS_WHVEC, SCM_IS_WHVEC_V, SCM_IS_WHVEC_B, SCM_IS_WHVEC_ANY):
	Use SCM_WVECT_TYPE.

	(SCM_WVECT_GC_CHAIN):  The weak objects are now chained together
	using an entry of the double cell.

2001-06-30  Thien-Thi Nguyen  <ttn@revel.glug.org>

	* stamp-h.in: bye bye

2001-06-30  Marius Vollmer  <mvo@zagadka.ping.de>

	* gh_eval.c (gh_eval_str): Use scm_c_eval_string instead of
	scm_eval_0str.

	* load.c, load.h (scm_c_primitive_load,
	scm_c_primitive_load_path): New.

	* strports.c, strports.h (scm_c_read_string): Renamed from
	scm_read_0str.  Also, added "const" qualifier to argument.
	(scm_c_eval_string): Renamed from scm_eval_0str.
	(scm_read_0str, scm_eval_0str): Deprecated.

2001-06-28  Martin Grabmueller  <mgrabmue@cs.tu-berlin.de>

	* fluids.c (scm_c_with_fluid): Use scm_list_1() instead of
	SCM_LIST1.

2001-06-28  Keisuke Nishida  <kxn30@po.cwru.edu>

	* list.h (scm_list_1, scm_list_2, scm_list_3, scm_list_4, scm_list_5,
	scm_list_n): New functions.
	(SCM_LIST0, SCM_LIST1, SCM_LIST2, SCM_LIST3, SCM_LIST4, SCM_LIST5,
	SCM_LIST6, SCM_LIST7, SCM_LIST8, SCM_LIST9, scm_listify): Deprecated.
	(lots of files): Use the new functions.

	* goops.c (CALL_GF1, CALL_GF2, CALL_GF3, CALL_GF4): Use scm_call_N.

	* strings.c: #include "libguile/deprecation.h".

2001-06-27  Martin Grabmueller  <mgrabmue@cs.tu-berlin.de>

	* read.c (scm_lreadr): When reading a hash token, check for a
	user-defined hash procedure first, so that overriding the builtin
	hash characters is possible (this was needed for implementing
	SRFI-4's read synax `f32(...)').

	* num2integral.i.c: Use scm_t_signed_bits instead of scm_t_bits,
	because the latter is unsigned now and breaks comparisons like
	(n < (scm_t_signed_bits)MIN_VALUE).

2001-06-26  Neil Jerram  <neil@ossau.uklinux.net>

	* eval.h, eval.c (scm_call_4): New function.

	* eval.c (SCM_APPLY, SCM_CEVAL, ENTER_APPLY): Call trap handlers
	directly rather than dispatching to them via scm_ithrow and a lazy
	catch.

	* eval.c (scm_evaluator_trap_table), eval.h (SCM_ENTER_FRAME_HDLR,
	SCM_APPLY_FRAME_HDLR, SCM_EXIT_FRAME_HDLR): Add three new options
	for trap handler procedures.

	* debug.h (SCM_RESET_DEBUG_MODE): Add checks for trap handler
	procedures not being #f.

2001-06-27  Michael Livshin  <mlivshin@bigfoot.com>

	* Makefile.am (c-tokenize.c): add rule to generate it.
	(EXTRA_DIST): add c-tokenize.lex, so it gets distributed.

	filter-doc-snarfage.c: remove.

2001-06-26  Martin Grabmueller  <mgrabmue@cs.tu-berlin.de>

	* ports.c (scm_output_port_p): Use result of SCM_COERCE_OUTPORT.

	The following set of changes makes compiling Guile under various
	Windows compilers easier.  Compilation under GNU systems should
	not be affected at all.

	Thanks to Stefan Jahn for all necessary information, patches and
	testing.

	* posix.c: Conditialize getpwent, getgrent, kill, getppid, getuid,
	getpgrp, ttyname, primitive-fork and some header inclusion for
	Windows.

	* random.c: Define M_PI, if not predefined and use __int64 for
	LONG64 under Windows.

	* scmsigs.c: Emulate some functions (alarm, sleep, kill) under
	Windows and conditionalize some signal names.

	* socket.c (scm_getsockopt): Added missing comma.
	Include socket library header under Windows.

	* stime.c (CLKTCK): Add cast to int, to make it compile under
	Windows.

	* ports.c (truncate): New function, compiled only under Windows.

	* net_db.c: Do not declare errno under Windows.

	* iselect.h, inet_aton.c: Include socket library headers under
	Windows.

	* guile.c (inner_main): Under Windows, initialize socket library
	and initialize gdb_interface data structures.

	* gdb_interface.h: Under Windows, gdb_interface cannot be
	initialized statically.  Initialize at runtime instead.

	* fports.c (write_all): ssize_t -> size_t.
	(fport_print): Conditionalize call to ttyname().
	(getflags): New function, compiled only under Windows.

	* filesys.c: Conditionalize inclusion of <pwd.h>.  Conditionalize
	primitives chown, link, fcntl.
	(scm_basename, scm_dirname): Under Windows, handle \ as well as /
	as path seperator.

	* backtrace.c: Include <io.h> under Windows.

	* async.h (ASYNCH, SCM_ASYNC_H): Rename <foo>H to SCM_<foo>_H.

	* _scm.h: Added preprocessor conditional for __MINGW32__ for errno
	declaration.

2001-06-27  Keisuke Nishida  <kxn30@po.cwru.edu>

	* eval.c (scm_call_0, scm_call_1, scm_call_2, scm_call_3,
	scm_apply_0, scm_apply_1, scm_apply_2, scm_apply_3): New functions.
	* eval.h (scm_call_0, scm_call_1, scm_call_2, scm_call_3,
	scm_apply_0, scm_apply_1, scm_apply_2, scm_apply_3): Declared.
	* async.c (scm_run_asyncs), coop-threads.c (scheme_body_bootstrip,
	scheme_handler_bootstrip), debug.c (with_traps_inner), dynwind.c
	(scm_dynamic_wind, scm_dowinds), environments.c
	(import_environment_conflict), eval.c (scm_macroexp, scm_force,
	scm_primitive_eval_x, scm_primitive_eval), fluids.c (apply_thunk),
	goops.c (GETVAR, purgatory, make_class_from_template,
	scm_ensure_accessor), hashtab.c (scm_ihashx, scm_sloppy_assx,
	scm_delx_x, fold_proc), hooks.c (scm_c_run_hook), load.c
	(scm_primitive_load), modules.c (scm_resolve_module,
	scm_c_define_module, scm_c_use_module, scm_c_export,
	module_variable, scm_eval_closure_lookup, scm_sym2var,
	scm_make_module, scm_ensure_user_module, scm_load_scheme_module),
	ports.c (scm_port_for_each), print.c (scm_printer_apply),
	properties.c (scm_primitive_property_ref), ramap.c (ramap,
	ramap_cxr, rafe, scm_array_index_map_x, read.c (scm_lreadr),
	scmsigs.c (sys_deliver_signals), sort.c (applyless), strports.c
	(scm_object_to_string, scm_call_with_output_string,
	scm_call_with_input_string), throw.c (scm_body_thunk,
	scm_handle_by_proc, hbpca_body), unif.c (scm_make_shared_array,
	scm_make_shared_array), vports.c (sf_flush, sf_write,
	sf_fill_input, sf_close): Use one of the above functions.
	* goops.c, hashtab.c, scmsigs.c, sort.c: #include "libguile/root.h".

2001-06-26  Dirk Herrmann  <D.Herrmann@tu-bs.de>

	* filesys.c (scm_close), ports.c (scm_close_port,
	scm_port_closed_p), strop.c (scm_string_null_p):  Use SCM_BOOL
	instead of SCM_NEGATE_BOOL.

	* filesys.c (scm_stat):  Clean up type dispatch.

	* filesys.c (scm_stat), ports.c (scm_input_port_p,
	scm_output_port_p):  Get rid of redundant IM type check.

	* filesys.c (scm_readdir, scm_getcwd, scm_readlink), gh_data.c
	(gh_str2scm), load.c (scm_primitive_load, scm_internal_parse_path,
	scm_search_path), net_db.c (scm_gethost, scm_getnet, scm_getproto,
	scm_return_entry), numbers.c (scm_number_to_string), objects.c
	(scm_make_subclass_object), ports.c (scm_port_mode), read.c
	(scm_lreadr), simpos.c (scm_getenv), socket.c (scm_inet_ntoa,
	scm_addr_vector), stime.c (scm_strftime), strings.c
	(scm_makfromstrs, scm_makfrom0str, scm_substring), strings.h
	(SCM_STRING_COERCE_0TERMINATION_X), strop.c (string_copy,
	scm_string_split), strports.c (scm_strport_to_string), symbols.c
	(scm_symbol_to_string), vports.c (sf_write):  Use scm_mem2string
	instead of scm_makfromstr.

	* net_db.c (scm_sethost, scm_setnet, scm_setproto, scm_setserv),
	ports.c (scm_close_all_ports_except), read.c (scm_lreadr,
	scm_read_hash_extend), stime.c (scm_strftime), strings.c
	(scm_string_append, scm_string), strings.h (SCM_STRINGP,
	SCM_STRING_COERCE_0TERMINATION_X, SCM_RWSTRINGP), strop.c
	(string_capitalize_x):  Prefer explicit type check over SCM_N?IMP,
	!SCM_<pred> over SCM_N<pred>.

	* strings.[ch] (scm_makfromstr):  Deprecated.

	(scm_mem2string):  New function, replaces scm_makfromstr.

	* strings.c (scm_substring), strop.c (string_copy,
	scm_string_split), strports.c (scm_strport_to_string), symbols.c
	(scm_symbol_to_string):  Fix gc problem.

	* strings.h (STRINGSH, SCM_STRINGS_H): Rename <foo>H to
	SCM_<foo>_H.

	* validate.h (SCM_VALIDATE_SUBSTRING_SPEC_COPY):  Eliminate
	warning about comparing signed and unsigned values.  This fix is
	not optimal, since it won't work reliably if sizeof (c_start) >
	sizeof (size_t) or sizeof (c_end) > sizeof (size_t).  A better
	solution is to define this macro as an inline function, thus
	allowing to specifiy the types of c_start and c_end.

2001-06-25  Dirk Herrmann  <D.Herrmann@tu-bs.de>

	* debug.h (SCM_DEBUGOBJ_FRAME):  Deliver result as a
	scm_t_debug_frame*.

	* debug.h (DEBUGH, SCM_DEBUG_H), stacks.h (STACKSH, SCM_STACKSH):
	Rename <foo>H to SCM_<foo>_H.

	* stacks.c (NEXT_FRAME, narrow_stack):  Prefer explicit type check
	over SCM_N?IMP, !SCM_<pred> over SCM_N<pred>.

	(narrow_stack):  Make i unsigned.  Don't use side-effecting
	operations in conditions.

	(narrow_stack, scm_make_stack, scm_stack_id,
	scm_last_stack_frame):  Get rid of redundant SCM_N?IMP checks.

	(scm_make_stack, scm_stack_id, scm_last_stack_frame):  Clean up
	type dispatch.  No need to cast result of SCM_DEBUGOBJ_FRAME any
	more.

	(scm_stack_ref, scm_frame_previous, scm_frame_next):  Fix
	signedness.