void tex::sub_sup () { ptr p; int t; p = null; t = EMPTY; if (tail != head && scripts_allowed(tail)) { p = (cur_cmd == SUP_MARK) ? supscr(tail) : subscr(tail); t = math_type(p); } if (p == null || t != EMPTY) { tail_append(new_noad()); p = (cur_cmd == SUP_MARK) ? supscr(tail) : subscr(tail); if (t != EMPTY) { if (cur_cmd == SUP_MARK) { print_err("Double superscript"); help_double_sup(); } else { print_err("Double subscript"); help_double_sub(); } error(); } } scan_math(p); }
void tex::math_left_right () { ptr p; int t; mcell garbage; t = cur_chr; if (t == RIGHT_NOAD && cur_group != MATH_LEFT_GROUP) { if (cur_group == MATH_SHIFT_GROUP) { scan_delimiter((ptr)&garbage, FALSE); print_err("Extra "); print_esc("right"); help_xtra_right(); error(); } else { off_save(); } } else { p = new_noad(); type(p) = t; scan_delimiter(delimiter(p), FALSE); if (t == LEFT_NOAD) { push_math(MATH_LEFT_GROUP); tail = link(head) = p; } else { p = fin_mlist(p); unsave(); tail_append(new_noad()); type(tail) = INNER_NOAD; math_type(nucleus(tail)) = SUB_MLIST; math_link(nucleus(tail)) = p; } } }
void tex::math_ac () { if (cur_cmd == ACCENT) { print_err("Please use "); print_esc("mathaccent"); print(" for accents in math mode"); help_math_accent(); error(); } tail_append(new_node(ACCENT_NOAD_SIZE)); type(tail) = ACCENT_NOAD; subtype(tail) = NORMAL; mzero(nucleus(tail)); mzero(subscr(tail)); mzero(supscr(tail)); math_type(accent_chr(tail)) = MATH_CHAR; scan_fifteen_bit_int(); character(accent_chr(tail)) = cur_val % 256; if (cur_val >= VAR_CODE && fam_in_range()) { fam(accent_chr(tail)) = cur_fam; } else { fam(accent_chr(tail)) = cur_val / 256 % 16; } scan_math(nucleus(tail)); }
static void write_image_or_node(lua_State * L, wrtype_e writetype) { image *a, **aa; image_dict *ad; halfword n; if (lua_gettop(L) != 1) luaL_error(L, "%s expects an argument", wrtype_s[writetype]); if (lua_istable(L, 1)) (void) l_new_image(L); aa = (image **) luaL_checkudata(L, 1, TYPE_IMG); a = *aa; ad = img_dict(a); setup_image(static_pdf, a, writetype); switch (writetype) { case WR_WRITE: n = img_to_node(L, a); tail_append(n); break; case WR_IMMEDIATEWRITE: write_img(static_pdf, ad); break; case WR_NODE: lua_pop(L, 1); /* - */ n = img_to_node(L, a); lua_nodelib_push_fast(L, n); break; default: luaL_error(L, "%s expects an valid image", wrtype_s[writetype]); } if (img_state(ad) < DICT_REFERED) img_state(ad) = DICT_REFERED; }
void tex::set_math_char(int c) { ptr p; if (c >= 0100000) { cur_cs = active_base[cur_chr]; cur_cmd = eq_type(cur_cs); cur_chr = equiv(cur_cs); x_token(); back_input(); } else { p = new_noad(); math_type(nucleus(p)) = MATH_CHAR; character(nucleus(p)) = c % 256; fam(nucleus(p)) = c / 256 % 16; if (c >= VAR_CODE) { if (fam_in_range()) fam(nucleus(p)) = cur_fam; type(p) = ORD_NOAD; } else { type(p) = ORD_NOAD + c / 010000; } tail_append(p); } }
void tex::append_penalty () { scan_int(); tail_append(new_penalty(cur_val)); if (mode == VMODE) build_page(); }
static void write_image_or_node(lua_State * L, wrtype_e writetype) { image *a, **aa; image_dict *ad; halfword n; if (lua_gettop(L) != 1) luaL_error(L, "%s needs exactly 1 argument", wrtype_s[writetype]); if (lua_istable(L, 1)) (void) l_new_image(L); /* image --- if everything worked well */ aa = (image **) luaL_checkudata(L, 1, TYPE_IMG); /* image */ a = *aa; ad = img_dict(a); setup_image(static_pdf, a, writetype); switch (writetype) { case WR_WRITE: n = img_to_node(a); tail_append(n); break; /* image */ case WR_IMMEDIATEWRITE: write_img(static_pdf, ad); break; /* image */ case WR_NODE: /* image */ lua_pop(L, 1); /* - */ n = img_to_node(a); lua_nodelib_push_fast(L, n); break; /* node */ default: assert(0); } if (img_state(ad) < DICT_REFERED) img_state(ad) = DICT_REFERED; }
void tex::append_choices () { tail_append(new_choice()); incr(save_ptr); saved(-1) = 0; scan_left_brace(); push_math(MATH_CHOICE_GROUP); }
bool tex::its_all_over () { if (privileged()) { if (page_head == page_tail && head == tail && dead_cycles == 0) { return TRUE; } back_input(); tail_append(new_null_box()); box_width(tail) = hsize; tail_append(new_glue(fill_glue)); tail_append(new_penalty(-010000000000)); build_page(); } return FALSE; }
void tex::append_kern () { int s; s = cur_chr; scan_dimen(s == MU_GLUE, FALSE, FALSE); tail_append(new_kern(cur_val)); subtype(tail) = s; }
void tex::make_mark () { ptr p; scan_toks(FALSE, TRUE); p = new_node(SMALL_NODE_SIZE); type(p) = MARK_NODE; subtype(p) = 0; mark_ptr(p) = def_ref; tail_append(p); }
void tex::math_radical () { tail_append(new_node(RADICAL_NOAD_SIZE)); type(tail) = RADICAL_NOAD; subtype(tail) = NORMAL; mzero(nucleus(tail)); mzero(supscr(tail)); mzero(subscr(tail)); scan_delimiter(left_delimiter(tail), TRUE); scan_math(nucleus(tail)); }
void tex::append_to_vlist(ptr b) { scal d; ptr p; append_to_vlist_called=true; if (prev_depth > IGNORE_DEPTH) { d = glue_width(baseline_skip) - prev_depth - box_height(b); if (d < line_skip_limit) { p = new_param_glue(LINE_SKIP_CODE); } else { p = new_skip_param(BASELINE_SKIP_CODE); glue_width(glue_ptr(p)) = d; } tail_append(p); } tail_append(b); prev_depth = box_depth(b); }
void tex::make_accent () { fnt f; qcell i; ptr p, q, r; scal a, h, w, x; float s, t; scal delta; scan_char_num(); f = cur_font; p = new_character(f, cur_val); if (p != null) { x = x_height(f); s = (float) slant(f) / 65536.0; a = char_width(f, char_info(f, character(p))); do_assignments(); q = null; f = cur_font; if (cur_cmd == LETTER || cur_cmd == OTHER_CHAR || cur_cmd == CHAR_GIVEN) { q = new_character(f, cur_chr); } else if (cur_cmd == CHAR_NUM) { scan_char_num(); q = new_character(f, cur_val); } else { back_input(); } if (q != null) { t = (float) slant(f) / 65536.0; i = char_info(f, character(q)); w = char_width(f, i); h = char_height(f, height_depth(i)); if (h != x) { p = hpack(p, 0, ADDITIONAL); shift_amount(p) = x - h; } delta = round((float) (w - a) / 2.0 + h * t - x * s); r = new_kern(delta); subtype(r) = ACC_KERN; link(tail) = r; link(r) = p; tail = new_kern(-a - delta); subtype(tail) = ACC_KERN; link(p) = tail; p = q; } tail_append(p); space_factor = 1000; } }
void scan_pdfrefximage(PDF pdf) { /*tex One could scan transform as well. */ int transform = 0; /*tex Begin of experiment. */ int open = 0; /*tex End of experiment. */ image_dict *idict; /*tex This scans |<rule spec>| to |alt_rule|. */ scaled_whd alt_rule, dim; alt_rule = scan_alt_rule(); /*tex Begin of experiment. */ if (scan_keyword("keepopen")) { open = 1; } /*tex End of experiment. */ scan_int(); check_obj_type(pdf, obj_type_ximage, cur_val); tail_append(new_rule(image_rule)); idict = idict_array[obj_data_ptr(pdf, cur_val)]; /*tex Begin of experiment, */ if (open) { /*tex So we keep the original value when no close is given. */ idict->keepopen = 1; } /*tex End of experiment. */ if (img_state(idict) == DICT_NEW) { normal_warning("image","don't rely on the image data to be okay"); width(tail_par) = 0; height(tail_par) = 0; depth(tail_par) = 0; } else { if (alt_rule.wd != null_flag || alt_rule.ht != null_flag || alt_rule.dp != null_flag) { dim = scale_img(idict, alt_rule, transform); } else { dim = scale_img(idict, img_dimen(idict), img_transform(idict)); } width(tail_par) = dim.wd; height(tail_par) = dim.ht; depth(tail_par) = dim.dp; rule_transform(tail_par) = transform; rule_index(tail_par) = img_index(idict); } }
void tex::indent_in_hmode () { ptr p, q; if (cur_chr > 0) { p = new_null_box(); box_width(p) = par_indent; if (abs(mode) == HMODE) { space_factor = 1000; } else { q = new_noad(); math_type(nucleus(q)) = SUB_BOX; math_link(nucleus(q)) = p; p = q; } tail_append(p); } }
void tex::append_discretionary () { int c; tail_append(new_disc()); if (cur_chr == 1) { c = hyphen_char(cur_font); if (c >= 0 && c < 256) pre_break(tail) = new_character(cur_font, c); } else { incr(save_ptr); saved(-1) = 0; scan_left_brace(); new_save_level(DISC_GROUP); push_nest(); mode = -HMODE; space_factor = 1000; } }
void tex::new_graf(bool indented) { prev_graf = 0; if (mode == VMODE || head != tail) tail_append(new_param_glue(PAR_SKIP_CODE)); lhmin = norm_min(left_hyphen_min); rhmin = norm_min(right_hyphen_min); push_nest(); mode = HMODE; space_factor = 1000; clang = 0; if (indented) { link(head) = tail = new_null_box(); box_width(tail) = par_indent; } if (every_par != null) begin_token_list(every_par, EVERY_PAR_TEXT); if (nest_ptr == nest + 1) build_page(); }
void tex::append_glue () { int s; s = cur_chr; switch (s) { case FIL_CODE: cur_val = fil_glue; break; case FILL_CODE: cur_val = fill_glue; break; case SS_CODE: cur_val = ss_glue; break; case FIL_NEG_CODE: cur_val = fil_neg_glue; break; case SKIP_CODE: scan_glue(GLUE_VAL); break; case MSKIP_CODE: scan_glue(MU_VAL); break; default: break; } tail_append(new_glue(cur_val)); if (s >= SKIP_CODE) { decr(glue_ref_count(cur_val)); if (s > SKIP_CODE) subtype(tail) = MU_GLUE; } }
void tex::app_space () { ptr p, q; if (space_factor >= 2000 && xspace_skip != zero_glue) { q = new_param_glue(XSPACE_SKIP_CODE); } else { if (space_skip != zero_glue) { p = space_skip; } else { p = find_font_glue(cur_font); } p = new_spec(p); if (space_factor >= 2000) glue_width(p) += extra_space(cur_font); stretch(p) = xn_over_d(stretch(p), space_factor, 1000); shrink(p) = xn_over_d(shrink(p), 1000L, space_factor); q = new_glue(p); glue_ref_count(p) = 0; } tail_append(q); }
void tex::main_control() { if (every_job != null) begin_token_list(every_job, EVERY_JOB_TEXT); big_switch: get_x_token(); reswitch: if (tracing_commands > 0) show_cur_cmd_chr(); switch(abs(mode) + cur_cmd) { hmode(LETTER): hmode(OTHER_CHAR): hmode(CHAR_GIVEN): goto main_loop; hmode(CHAR_NUM): scan_char_num(); cur_chr = cur_val; goto main_loop; hmode(NO_BOUNDARY): get_x_token(); if (cur_cmd == LETTER || cur_cmd == OTHER_CHAR || cur_cmd == CHAR_GIVEN || cur_cmd == CHAR_NUM) { cancel_boundary = TRUE; } goto reswitch; hmode(SPACER): if (space_factor == 1000) { goto append_normal_space; } else { app_space(); } break; hmode(EX_SPACE): mmode(EX_SPACE): goto append_normal_space; any_mode(RELAX): vmode(SPACER): mmode(SPACER): mmode(NO_BOUNDARY): break; any_mode(IGNORE_SPACES): get_nbx_token(); goto reswitch; vmode(STOP): if (its_all_over()) return; break; any_mode(LAST_ITEM): any_mode(MAC_PARAM): non_math(EQ_NO): vmode(VMOVE): hmode(HMOVE): mmode(HMOVE): vmode(VADJUST): vmode(ITAL_CORR): report_illegal_case(); break; non_math(SUP_MARK): non_math(SUB_MARK): non_math(MATH_CHAR_NUM): non_math(MATH_GIVEN): non_math(MATH_COMP): non_math(DELIM_NUM): non_math(LEFT_RIGHT): non_math(ABOVE): non_math(RADICAL): non_math(MATH_STYLE): non_math(MATH_CHOICE): non_math(VCENTER): non_math(NON_SCRIPT): non_math(MKERN): non_math(LIMIT_SWITCH): non_math(MSKIP): non_math(MATH_ACCENT): mmode(ENDV): mmode(PAR_END): mmode(STOP): mmode(VSKIP): mmode(UN_VBOX): mmode(VALIGN): mmode(HRULE): insert_dollar_sign(); break; vmode(HRULE): hmode(VRULE): mmode(VRULE): tail_append(scan_rule_spec()); if (abs(mode) == VMODE) prev_depth = IGNORE_DEPTH; else if (abs(mode) == HMODE) space_factor = 1000; break; vmode(VSKIP): hmode(HSKIP): mmode(HSKIP): mmode(MSKIP): append_glue(); break; any_mode(KERN): mmode(MKERN): append_kern(); break; non_math(LEFT_BRACE): new_save_level(SIMPLE_GROUP); break; any_mode(BEGIN_GROUP): new_save_level(SEMI_SIMPLE_GROUP); break; any_mode(END_GROUP): if (cur_group == SEMI_SIMPLE_GROUP) { unsave(); } else { off_save(); } break; any_mode(RIGHT_BRACE): handle_right_brace(); break; vmode(HMOVE): hmode(VMOVE): mmode(VMOVE): { int t; t = cur_chr; scan_normal_dimen(); if (t == 0) { scan_box(cur_val); } else { scan_box(-cur_val); } break; } any_mode(LEADER_SHIP): scan_box(LEADER_FLAG + cur_chr - A_LEADERS); break; any_mode(MAKE_BOX): begin_box(0); break; vmode(START_PAR): new_graf(cur_chr > 0); break; vmode(LETTER): vmode(OTHER_CHAR): vmode(CHAR_NUM): vmode(CHAR_GIVEN): vmode(MATH_SHIFT): vmode(UN_HBOX): vmode(VRULE): vmode(ACCENT): vmode(DISCRETIONARY): vmode(HSKIP): vmode(VALIGN): vmode(EX_SPACE): vmode(NO_BOUNDARY): back_input(); new_graf(TRUE); break; hmode(START_PAR): mmode(START_PAR): indent_in_hmode(); break; vmode(PAR_END): normal_paragraph(); if (mode > 0) build_page(); break; hmode(PAR_END): if (align_state < 0) off_save(); end_graf(); if (mode == VMODE) build_page(); break; hmode(STOP): hmode(VSKIP): hmode(HRULE): hmode(UN_VBOX): hmode(HALIGN): head_for_vmode(); break; any_mode(INSERT): hmode(VADJUST): mmode(VADJUST): begin_insert_or_adjust(); break; any_mode(MARK): make_mark(); break; any_mode(BREAK_PENALTY): append_penalty(); break; any_mode(REMOVE_ITEM): delete_last(); break; vmode(UN_VBOX): hmode(UN_HBOX): mmode(UN_HBOX): unpackage(); break; hmode(ITAL_CORR): append_italic_correction(); break; mmode(ITAL_CORR): tail_append(new_kern(0)); break; hmode(DISCRETIONARY): mmode(DISCRETIONARY): append_discretionary(); break; hmode(ACCENT): make_accent(); break; any_mode(CAR_RET): any_mode(TAB_MARK): align_error(); break; any_mode(NO_ALIGN): no_align_error(); break; any_mode(OMIT): omit_error(); break; vmode(HALIGN): hmode(VALIGN): init_align(); break; mmode(HALIGN): if (privileged()) { if (cur_group == MATH_SHIFT_GROUP) { init_align(); } else { off_save(); } } break; vmode(ENDV): hmode(ENDV): do_endv(); break; any_mode(END_CS_NAME): cs_error(); break; hmode(MATH_SHIFT): init_math(); break; mmode(EQ_NO): if (privileged()) { if (cur_group == MATH_SHIFT_GROUP) { start_eq_no(); } else { off_save(); } } break; mmode(LEFT_BRACE): tail_append(new_noad()); back_input(); scan_math(nucleus(tail)); break; mmode(LETTER): mmode(OTHER_CHAR): mmode(CHAR_GIVEN): if (cur_chr < 256) set_math_char(math_code(cur_chr)); else set_math_char(cur_chr); break; mmode(CHAR_NUM): scan_char_num(); cur_chr = cur_val; if (cur_chr < 256) set_math_char(math_code(cur_chr)); else set_math_char(cur_chr); break; mmode(MATH_CHAR_NUM): scan_fifteen_bit_int(); set_math_char(cur_val); break; mmode(MATH_GIVEN): set_math_char(cur_chr); break; mmode(DELIM_NUM): scan_twenty_seven_bit_int(); set_math_char(cur_val / 010000); break; mmode(MATH_COMP): tail_append(new_noad()); type(tail) = cur_chr; scan_math(nucleus(tail)); break; mmode(LIMIT_SWITCH): math_limit_switch(); break; mmode(RADICAL): math_radical(); break; mmode(ACCENT): mmode(MATH_ACCENT): math_ac(); break; mmode(VCENTER): scan_spec(VCENTER_GROUP, FALSE); normal_paragraph(); push_nest(); mode = -VMODE; prev_depth = IGNORE_DEPTH; if (every_vbox != null) begin_token_list(every_vbox, EVERY_VBOX_TEXT); break; mmode(MATH_STYLE): tail_append(new_style(cur_chr)); break; mmode(NON_SCRIPT): tail_append(new_glue(zero_glue)); subtype(tail) = COND_MATH_GLUE; break; mmode(MATH_CHOICE): append_choices(); break; mmode(SUB_MARK): mmode(SUP_MARK): sub_sup(); break; mmode(ABOVE): math_fraction(); break; mmode(LEFT_RIGHT): math_left_right(); break; mmode(MATH_SHIFT): if (cur_group == MATH_SHIFT_GROUP) { after_math(); } else { off_save(); } break; any_mode(AFTER_ASSIGNMENT): get_token(); after_token = cur_tok; break; any_mode(AFTER_GROUP): get_token(); save_for_after(cur_tok); break; any_mode(IN_STREAM): clopen_stream(); break; any_mode(MESSAGE): issue_message(); break; any_mode(CASE_SHIFT): shift_case(); break; any_mode(XRAY): show_whatever(); break; any_mode(EXTENSION): do_extension(); break; default: prefixed_command(); break; } goto big_switch; #define adjust_space_factor() \ { \ main_s = sf_code(cur_chr); \ if (main_s == 1000) { \ space_factor = 1000; \ } else if (main_s < 1000) { \ if (main_s > 0) { \ space_factor = main_s; \ } \ } else if (space_factor < 1000) { \ space_factor = 1000; \ } else { \ space_factor = main_s; \ } \ } main_loop: adjust_space_factor(); main_f = cur_font; bchar = font_bchar(main_f); false_bchar = font_false_bchar(main_f); if (mode > 0 && language != clang) fix_language(); fast_new_avail(lig_stack); font(lig_stack) = main_f; character(lig_stack) = cur_l = cur_chr; cur_q = tail; if (cancel_boundary) { cancel_boundary = FALSE; main_k = NON_ADDRESS; } else { main_k = bchar_label(main_f); } if (main_k == NON_ADDRESS) goto main_loop_move_2; cur_r = cur_l; cur_l = NON_CHAR; goto main_lig_loop_1; #define pack_lig(RT_HIT) \ { \ main_p = new_ligature(main_f, cur_l, link(cur_q)); \ if (lft_hit) { \ subtype(main_p) = 2; \ lft_hit = FALSE; \ } \ if (RT_HIT && lig_stack == null) { \ incr(subtype(main_p)); \ rt_hit = FALSE; \ } \ tail = link(cur_q) = main_p; \ ligature_present = FALSE; \ } #define wrapup(RT_HIT) \ { \ if (cur_l < NON_CHAR) { \ if (character(tail) == hyphen_char(main_f) \ && link(cur_q) != null) \ ins_disc = TRUE; \ if (ligature_present) \ pack_lig(RT_HIT); \ if (ins_disc) { \ ins_disc = FALSE; \ if (mode > 0) \ tail_append(new_disc()); \ } \ } \ } main_loop_wrapup: wrapup(rt_hit); main_loop_move: if (lig_stack == null) goto reswitch; cur_q = tail; cur_l = cur_r; main_loop_move_1: if (!is_char_node(lig_stack)) goto main_loop_move_lig; main_loop_move_2: if (cur_chr < font_bc(main_f) || cur_chr > font_ec(main_f)) { char_warning(main_f, cur_chr); free_avail(lig_stack); goto big_switch; } main_i = char_info(main_f, cur_l); if (!char_exists(main_i)) { char_warning(main_f, cur_chr); free_avail(lig_stack); goto big_switch; } tail_append(lig_stack); main_loop_lookahead: get_next(); if (cur_cmd == LETTER || cur_cmd == OTHER_CHAR || cur_cmd == CHAR_GIVEN) { goto main_loop_lookahead_1; } x_token(); if (cur_cmd == LETTER || cur_cmd == OTHER_CHAR || cur_cmd == CHAR_GIVEN) { goto main_loop_lookahead_1; } if (cur_cmd == CHAR_NUM) { scan_char_num(); cur_chr = cur_val; goto main_loop_lookahead_1; } if (cur_cmd == NO_BOUNDARY) { bchar = NON_CHAR; } cur_r = bchar; lig_stack = null; goto main_lig_loop; main_loop_lookahead_1: adjust_space_factor(); fast_new_avail(lig_stack); font(lig_stack) = main_f; character(lig_stack) = cur_r = cur_chr; if (cur_r == false_bchar) { cur_r = NON_CHAR; } main_lig_loop: if (char_tag(main_i) != LIG_TAG) { goto main_loop_wrapup; } main_k = lig_kern_start(main_f, main_i); main_j = *main_k; if (skip_byte(main_j) <= STOP_FLAG) { goto main_lig_loop_2; } main_k = lig_kern_restart(main_f, main_j); main_lig_loop_1: main_j = *main_k; main_lig_loop_2: if (next_char(main_j) == cur_r && skip_byte(main_j) <= STOP_FLAG) { if (op_byte(main_j) >= KERN_FLAG) { wrapup(rt_hit); tail_append(new_kern(char_kern(main_f, main_j))); goto main_loop_move; } if (cur_l == NON_CHAR) { lft_hit = TRUE; } else if (lig_stack == null) { rt_hit = TRUE; } if(interrupted) throw std::logic_error("interrupted"); switch (op_byte(main_j)) { case 1: case 5: cur_l = rem_byte(main_j); main_i = char_info(main_f, cur_l); ligature_present = TRUE; break; case 2: case 6: cur_r = rem_byte(main_j); if (lig_stack == null) { lig_stack = new_lig_item(cur_r); bchar = NON_CHAR; } else if (is_char_node(lig_stack)) { main_p = lig_stack; lig_stack = new_lig_item(cur_r); lig_ptr(lig_stack) = main_p; } else { character(lig_stack) = cur_r; } break; case 3: cur_r = rem_byte(main_j); main_p = lig_stack; lig_stack = new_lig_item(cur_r); link(lig_stack) = main_p; break; case 7: case 11: wrapup(FALSE); cur_q = tail; cur_l = rem_byte(main_j); main_i = char_info(main_f, cur_l); ligature_present = TRUE; break; default: cur_l = rem_byte(main_j); ligature_present = TRUE; if (lig_stack == null) { goto main_loop_wrapup; } else { goto main_loop_move_1; } break; } if (op_byte(main_j) > 4 && op_byte(main_j) != 7) goto main_loop_wrapup; if (cur_l < NON_CHAR) goto main_lig_loop; main_k = bchar_label(main_f); goto main_lig_loop_1; } if (skip_byte(main_j) == 0) { incr(main_k); } else { if (skip_byte(main_j) >= STOP_FLAG) goto main_loop_wrapup; main_k += skip_byte(main_j) + 1; } goto main_lig_loop_1; main_loop_move_lig: main_p = lig_ptr(lig_stack); if (main_p != null) { tail_append(main_p); } main_t = lig_stack; lig_stack = link(main_t); free_node(main_t, SMALL_NODE_SIZE); main_i = char_info(main_f, cur_l); ligature_present = TRUE; if (lig_stack == null) { if (main_p != null) { goto main_loop_lookahead; } else { cur_r = bchar; } } else { cur_r = character(lig_stack); } goto main_lig_loop; append_normal_space: if (space_skip == zero_glue) { main_p = font_glue(cur_font); if (main_p == null) main_p = find_font_glue(cur_font); main_t = new_glue(main_p); } else { main_t = new_param_glue(SPACE_SKIP_CODE); } tail_append(main_t); goto big_switch; }
void tex::after_math () { ptr a; ptr b; scal d; scal e; bool l; int m; ptr p; scal q; ptr r; scal s; scal t; scal w; scal z; int g1; int g2; bool danger; danger = check_font_params(); m = mode; l = FALSE; p = fin_mlist(null); if (mode == -m) { check_dollar(); a = hpack(mlist_to_hlist(p, TEXT_STYLE, FALSE), 0, ADDITIONAL); unsave(); decr(save_ptr); if (saved(0) == 1) l = TRUE; danger = check_font_params(); m = mode; p = fin_mlist(null); } else { a = null; } if (m < 0) { tail_append(new_math(math_surround, BEFORE)); link(tail) = mlist_to_hlist(p, TEXT_STYLE, mode > 0); while (link(tail) != null) tail = link(tail); tail_append(new_math(math_surround, AFTER)); space_factor = 1000; unsave(); } else { if (a == null) check_dollar(); p = mlist_to_hlist(p, DISPLAY_STYLE, FALSE); tex::adjust_tail = tex::adjust_head; b = hpack(p, 0, ADDITIONAL); p = list_ptr(b); t = tex::adjust_tail; tex::adjust_tail = null; w = box_width(b); z = display_width; s = display_indent; if (a == null || danger) { e = q = 0; } else { e = box_width(a); q = e + math_quad(TEXT_SIZE); } if (w + q > z) { if (e != 0 && (w - tex::total_shrink[NORMAL] + q <= z || tex::total_shrink[FIL] != 0 || tex::total_shrink[FILL] != 0 || tex::total_shrink[FILLL] != 0)) { free_node(b, BOX_NODE_SIZE); b = hpack(p, z - q, EXACTLY); } else { e = 0; if (w > z) { free_node(b, BOX_NODE_SIZE); b = hpack(p, z, EXACTLY); } } w = box_width(b); } d = half(z - w); if (e > 0 && d < 2 * e) { d = half(z - w - e); if (p != null && type(p) == GLUE_NODE) { d = 0; } } tail_append(new_penalty(pre_display_penalty)); if (d + s <= pre_display_size || l) { g1 = ABOVE_DISPLAY_SKIP_CODE; g2 = BELOW_DISPLAY_SKIP_CODE; } else { g1 = ABOVE_DISPLAY_SHORT_SKIP_CODE; g2 = BELOW_DISPLAY_SHORT_SKIP_CODE; } if (l && e == 0) { shift_amount(a) = s; append_to_vlist(a); tail_append(new_penalty(INF_PENALTY)); } else { tail_append(new_param_glue(g1)); } if (e != 0) { r = new_kern(z - w - e - d); if (l) { link(a) = r; link(r) = b; b = a; d = 0; } else { link(b) = r; link(r) = a; } b = hpack(b, 0, ADDITIONAL); } shift_amount(b) = s + d; append_to_vlist(b); if (a != null && e == 0 && !l) { tail_append(new_penalty(INF_PENALTY)); shift_amount(a) = s + z - box_width(a); append_to_vlist(a); g2 = 0; } if (t != tex::adjust_head) { link(tail) = link(tex::adjust_head); tail = t; } tail_append(new_penalty(post_display_penalty)); if (g2 > 0) { tail_append(new_param_glue(g2)); } resume_after_display(); } }
void tex::box_end(int box_context) { ptr p; #define LEADERS "Leaders not followed by proper glue" if (box_context < BOX_FLAG) { if (cur_box != null) { shift_amount(cur_box) = box_context; if (abs(mode) == VMODE) { append_to_vlist(cur_box); if (tex::adjust_tail != null) { if (tex::adjust_head != tex::adjust_tail) { link(tail) = link(tex::adjust_head); tail = tex::adjust_tail; } tex::adjust_tail = null; } if (mode > 0) build_page(); } else { if (abs(mode) == HMODE) { space_factor = 1000; } else { p = new_noad(); math_type(nucleus(p)) = SUB_BOX; info(nucleus(p)) = cur_box; cur_box = p; } tail_append(cur_box); } } } else if (box_context < SHIP_OUT_FLAG) { if (box_context < BOX_FLAG + 256) { reg_define(box_reg[box_context - BOX_FLAG], BOX_REG, cur_box); } else { reg_gdefine(box_reg[box_context - BOX_FLAG - 256], BOX_REG, cur_box); } } else if (cur_box != null) { if (box_context > SHIP_OUT_FLAG) { get_nbrx_token(); if (cur_cmd == HSKIP && abs(mode) != VMODE || cur_cmd == VSKIP && abs(mode) == VMODE || cur_cmd == MSKIP && abs(mode) == MMODE) { append_glue(); leader_ptr(tail) = cur_box; subtype(tail) = box_context - (LEADER_FLAG - A_LEADERS); } else { print_err(LEADERS); help_leaders(); back_error(); flush_node_list(cur_box); } } else { ship_out(cur_box); } } }
void tex::handle_right_brace () { scal d; int f; ptr p; ptr q; switch (cur_group) { case SIMPLE_GROUP: unsave(); break; case BOTTOM_LEVEL: print_err("Too many }'s"); help_close_group(); error(); break; case SEMI_SIMPLE_GROUP: case MATH_SHIFT_GROUP: case MATH_LEFT_GROUP: extra_right_brace(); break; case HBOX_GROUP: package(0); break; case ADJUSTED_HBOX_GROUP: tex::adjust_tail = tex::adjust_head; package(0); break; case VBOX_GROUP: end_graf(); package(0); break; case VTOP_GROUP: end_graf(); package(VTOP_CODE); break; case INSERT_GROUP: end_graf(); q = split_top_skip; add_glue_ref(q); d = split_max_depth; f = floating_penalty; unsave(); decr(save_ptr); p = vpack(link(head), 0, ADDITIONAL); pop_nest(); if (saved(0) < 255) { tail_append(new_node(INS_NODE_SIZE)); type(tail) = INS_NODE; subtype(tail) = saved(0); ins_height(tail) = box_height(p) + box_depth(p); ins_ptr(tail) = list_ptr(p); split_top_ptr(tail) = q; ins_depth(tail) = d; float_cost(tail) = f; } else { tail_append(new_node(SMALL_NODE_SIZE)); type(tail) = ADJUST_NODE; subtype(tail) = 0; adjust_ptr(tail) = list_ptr(p); delete_glue_ref(q); } free_node(p, BOX_NODE_SIZE); if (nest_ptr == nest) build_page(); break; case OUTPUT_GROUP: if (loc != null || (token_type != OUTPUT_TEXT && token_type != BACKED_UP)) { print_err("Unbalanced output routine"); help_output_balance(); error(); do get_token(); while (loc != null); } end_token_list(); end_graf(); unsave(); output_active = FALSE; insert_penalties = 0; if (box(255) != null) { print_err("Output routine didn't use all of "); print_esc("box255"); help_output(); box_error(255); } if (tail != head) { link(page_tail) = link(head); page_tail = tail; } if (link(page_head) != null) { if (link(contrib_head) == null) contrib_tail = page_tail; link(page_tail) = link(contrib_head); link(contrib_head) = link(page_head); link(page_head) = null; page_tail = page_head; } pop_nest(); build_page(); break; case DISC_GROUP: build_discretionary(); break; case ALIGN_GROUP: back_input(); cur_tok = sym2tok(FROZEN_CR); print_err("Missing "); print_esc("cr"); print(" inserted"); help_align_cr(); ins_error(); break; case NO_ALIGN_GROUP: end_graf(); unsave(); align_peek(); break; case VCENTER_GROUP: end_graf(); unsave(); save_ptr -= 2; p = vpackage(link(head), saved(1), saved(0), MAX_DIMEN); pop_nest(); tail_append(new_noad()); type(tail) = VCENTER_NOAD; math_type(nucleus(tail)) = SUB_BOX; info(nucleus(tail)) = p; break; case MATH_CHOICE_GROUP: build_choices(); break; case MATH_GROUP: unsave(); decr(save_ptr); math_type(saved(0)) = SUB_MLIST; p = fin_mlist(null); math_link(saved(0)) = p; if (p != null) { if (link(p) == null) { if (type(p) == ORD_NOAD) { if (math_type(subscr(p)) == EMPTY && math_type(supscr(p)) == EMPTY) { mcopy(saved(0), nucleus(p)); free_node(p, NOAD_SIZE); } } else if (type(p) == ACCENT_NOAD && saved(0) == nucleus(tail) && type(tail) == ORD_NOAD) { q = head; while (link(q) != tail) q = link(q); link(q) = p; free_node(tail, NOAD_SIZE); tail = p; } } } break; default: confusion("rightbrace"); break; } }