Remove fixnum restriction on some display vars
This is a minor patch to remove some fixnum restrictions. Many more such patches are needed, but one thing at a time. * doc/emacs/custom.texi (Examining): Update fill-column example. * src/buffer.c (fill-column, left-margin, tab-width) (buffer-saved-size, left-margin-width, right-margin-width) (left-fringe-width, right-fringe-width, scroll-bar-width) (scroll-bar-height, buffer-display-count): Allow any integer; do not restrict to fixnums. * src/character.h (SANE_TAB_WIDTH): Do not assume tab_width is a nonnegative fixnum. (sanitize_tab_width): Take a Lisp_Object integer, not an EMACS_INT. Only use changed. * src/data.c (store_symval_forwarding): Remove unnecessary SYMBOLP since the predicate (e.g., Qintegerp) is always a symbol (leave the test in as an eassert). Avoid assignments inside if-conditions. * src/fileio.c (Fdo_auto_save): Do not assume buffer-saved-size is a fixnum. Avoid undefined behavior on EMACS_INT overflow by multiplying a fixnum by at most 4, not by at most 13. * src/window.c (set_window_buffer): When buffer-display-count is too large for a fixnum, make it a bignum. * src/xdisp.c (FILL_COLUMN_INDICATOR_NEEDED): Remove macro, ... (fill_column_indicator_column): ... replacing with this new function. All uses changed. The function is a bit pickier, to prevent problems with non-character fixnums and columns out of range for int, and to remove the assumption that integers are in fixnum range. (append_space_for_newline, extend_face_to_end_of_line): Avoid undefined behavior with signed integer overflow. Simplify.
Showing with 101 additions and 110 deletions