chemacs.git/src/term.c, branch devmain

Allow optionally disabling the use of TABs for TTY cursor movement

2026-05-31T08:36:15Z

* src/term.c (syms_of_term) : New var. : Doc fix. * src/cm.c (calccost): Use it to disable use of TABs for cursor motion on text terminals. * etc/NEWS: Announce the new variable.

Fix the MSDOS build

2026-05-28T04:59:55Z

* msdos/sedlibmk.inp (GL_GNULIB_STDC_[^ =] &c.): Rename from GL_STDC_... and define to 1 before other variables prefixed GL_GNULIB_ are defined to 0. (NEXT_AS_FIRST_DIRECTIVE_STDBIT_H) (NEXT_AS_FIRST_DIRECTIVE_STDCOUNTOF_H, STDCOUNTOF_H): Define. (GL_HAVE_STDBIT_H_CONDITION): Replace GL_GENERATE_STDBIT_H_CONDITION. (CXX_HAVE_STDCOUNTOF_H, GL_GNULIB_STREQ, GL_GNULIB_MEMEQ) (GL_GNULIB_STRNUL, GL_GENERATE_STDCOUNTOF_H_CONDITION): Substitute "1". * src/conf_post.h (_REGEX_AVOID_UCHAR_H) [MSDOS]: Define to 1. * src/term.c (init_tty) [MSDOS]: Set TN_max_colors to 16, which was deleted inadvertently with recent MS Windows modifications. * config.bat: Rename stdcountof.in.h appropriately.

ARRAYELTS → countof

2026-05-27T04:57:20Z

C2y will standardize countof as the macro that Emacs uses the name ARRAYELTS for. Switch to the standard name, which is supported by GCC 16+, by Clang 21, and by the Gnulib stdcountof-h module already in use for compilers that do not support countof. Also, use countof in a few places where we missed using ARRAYELTS. * admin/coccinelle/arrayelts.cocci: Suggest countof, not ARRAYELTS. * admin/merge-gnulib (GNULIB_MODULES): Add stdcountof-h, as it is now a direct rather than an indirect dependency. * exec/trace.c, src/lisp.h, src/sfnt.c: Include . (ARRAYELTS): Remove. All uses replaced by countof. * lib-src/ebrowse.c, lib-src/etags.c, lib-src/make-docfile.c: * lib-src/seccomp-filter.c, lwlib/lwlib-Xaw.c: Prefer and countof to doing things by hand.

Omit useless casts found by GCC 16

2026-05-27T04:57:19Z

GCC 16’s -Wuseless-cast warning can be useful. Fix the useless casts it identifies, and also fix false positives by using compound literals, which are safer anyway than casts. * src/composite.c (composition_adjust_point) (Ffind_composition_internal): * lwlib/xlwmenu.c (xlwMenuResources, xlwMenuClassRec) (resource_widget_value, XlwMenuDestroy, Select): * src/alloc.c (process_mark_stack): * src/data.c (Faref): * src/emacs-module.c (module_extract_big_integer): * src/fileio.c (Finsert_file_contents): * src/frame.h (FRAME_MESSAGE_BUF_SIZE): * src/gtkutil.c (xg_tool_item_stale_p, update_frame_tool_bar): * src/image.c (pbm_load, png_load_body, jpeg_load_body) (tiff_load, gif_load): * src/pdumper.c (ptrdiff_t_to_dump_off, dump_queue_dequeue) (field_relpos, dump_field_emacs_ptr) (dump_object_start_pseudovector, pdumper_remember_scalar_impl) (pdumper_load, syms_of_pdumper): * src/regex-emacs.c (BUF_PUSH, BUF_PUSH_2, POINTER_TO_OFFSET): * src/xdisp.c (remember_mouse_glyph, pint2str): * src/xterm.c (cvt_string_to_pixel, handle_one_xevent): Omit useless casts. Perhaps they were formerly needed, but they should not be needed now. * src/alloc.c (Fmemory_info): * src/category.c (Fdefine_category, Fmodify_category_entry): * src/data.c (Fash): * src/dispextern.h (GLYPH_CODE_P): * src/emacs.c (load_seccomp): * src/fns.c (Flocale_info, maybe_resize_hash_table): * src/indent.c (check_display_width): * src/json.c (symset_size): * src/lisp.h (XUNTAG, BOOL_VECTOR_LENGTH_MAX, obarray_size) (hash_table_index_size): * src/lread.c (make_obarray, grow_obarray, Fobarray_clear): * src/menu.c (digest_single_submenu, x_popup_menu_1): * src/term.c (init_tty): * src/widget.c (update_wm_hints): * src/xdisp.c (truncate_echo_area): * src/xfns.c (x_set_border_pixel): * src/xfont.c (xfont_match, xfont_open): * src/xmenu.c (set_frame_menubar): * test/src/emacs-module-resources/mod-test.c (emacs_module_init): Use compound literal instead of a cast that is useless in some platforms but not others. * src/dispextern.h, src/haikugui.h, src/w32gui.h: (WINDOW_HANDLE_UINTPTR): New macro. * src/frame.c (gui_report_frame_params): * src/xterm.c (x_try_cr_xlib_drawable): Use it. * src/lisp.h (XUNTAG): And tag with UINTPTR_MAX to pacify gcc warning about a constant out of range. (hash_idx_t): Make it int_least32_t, as it need not be exactly 32 bits. (PRIdHASH_IDX): New macro. * src/pdumper.c (dump_queue_dequeue): Use it. * src/profiler.c (setup_cpu_timer): Make a local EMACS_INT rather than int, to avoid need for casting later. * src/syntax.c (uninitialized_interval): Use 1u rather than 1 so the cast is always useful. A compound literal wouldn’t do here, as this macro needs to be an integer constant expression. * src/xfns.c (XICCallback, XICProc): Remove macros. (Xxic_preedit_start_callback): Use a cleaner way to specify it, avoiding the need for type macros, and for a cast if HAVE_XICCALLBACK_CALLBACK. * src/xterm.c (handle_one_xevent): 2nd arg is now XEvent * on all platforms, as there is no need to diverge, and diverging meant we needed lots of unnecessary casts.

Prefer ptrdiff_t to size_t when either will do

2026-05-24T02:18:53Z

Signed types are a bit safer, as they avoid some comparison confusion and -fsanitize=undefined can check more misuses of them. * src/alloc.c (lisp_malloc, lisp_align_malloc) (allocate_string_data, allocate_vector_from_block, object_bytes): * src/coding.c (from_unicode_buffer): * src/decompress.c (acc_size, accumulate_and_process_md5): * src/emacs.c (load_seccomp, shut_down_emacs): * src/fns.c (sxhash_bignum): * src/ftfont.c (get_adstyle_property): * src/image.c (lookup_image, xpm_init_color_cache) (xpm_cache_color): * src/json.c (json_out_str, struct json_parser) (json_make_object_workspace_for_slow_path) (json_make_object_workspace_for, json_parse_array) (json_parse_object): * src/sysdep.c (get_current_dir_name_or_unreachable) (init_sys_modes, convert_speed): * src/termchar.h (struct tty_display_info): * src/textconv.h (struct textconv_conversion_text): * src/xfns.c (struct x_xim_text_conversion_data) (x_encode_xim_text): * src/xselect.c (struct transfer, c_size_for_format) (x_size_for_format, selection_data_for_offset) (selection_data_size, x_start_selection_transfer) (x_continue_selection_transfer): Prefer ptrdiff_t to size_t when either will do. * src/term.c (Ftty__set_output_buffer_size): Limit output buffer size to PTRDIFF_MAX as well as to SIZE_MAX.

New function memory_full_up

2026-05-24T02:18:52Z

* src/alloc.c (memory_full_up): New function. Replace all callers of memory_full (SIZE_MAX) with callers to this function. This simplifies callers and should make future changes easier. It also saves a whopping 296 bytes in executable size with gcc 16.1.1 20260515 (Red Hat 16.1.1-2) x86-64.

Fix line-truncation on horizontally-split TTY frames

2026-04-25T11:39:53Z

* src/term.c (append_glyph, append_composite_glyph) (append_glyphless_glyph): Account for the right-border glyph when computing the end glyph of TEXT_AREA. (Bug#80900)

Simplify Tc/COLORTERM=truecolor escape sequence

2026-04-23T07:32:50Z

This should be more readable to most people, since C is more widely familiar than the terminfo language. * src/term.c (init_tty): Do the conversion from a single integer 24-bit color value to three 8-bit RGB values up-front. (Bug#70941)

Support setrgbb/setrgbf for setting 24-bit color

2026-04-23T07:29:00Z

* src/term.c (turn_on_face): Account for TF_rgb_separate. (init_tty): Support setrgbf/setrrgbb and set TF_rgb_separate accordingly. * src/termchar.h: Update commentary. (Bug#70941)

Use expected escape sequence for terminfo Tc and COLORTERM=truecolor

2026-04-23T07:20:41Z

When the non-standard terminfo capability Tc is present, or the environment variable COLORTERM is set to truecolor, use a hard-coded escape sequence that addresses all colors directly by their RGB values. Previously we used escape sequences cribbed from terminfo's setaf/setab for direct color, that expect that we will only try to use colors 000000 to 000007 for the first eight indexed colors. This isn't something we currently handle. * doc/misc/efaq.texi (Colors on a TTY): Fix off-by-one error in list of indexed colors for terminfo RGB terminals. * src/term.c (init_tty): Don’t use any indexed colors with terminfo Tc capability or COLORTERM=truecolor environment variable (bug#70941).