-#ifdef _WINDOWS
- #define NOCOMM
- #define NOSOUND
- #define NODRIVERS
- #define STRICT
- #pragma warning(disable:4115) // kill rpcasync.h complaint
- #include <windows.h>
- #define MYLIBAPI __declspec(dllexport)
-#endif
-
-#include "texwin.h"
-
-#pragma warning(disable:4996)
-#pragma warning(disable:4131) // old style declarator
-#pragma warning(disable:4135) // conversion between different integral types
-#pragma warning(disable:4127) // conditional expression is constant
-
-#include <setjmp.h>
-
-#define EXTERN extern
-
-#include "texd.h"
-
-#pragma warning(disable:4244) /* 96/Jan/10 */
-
-/* *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** */
-
-/* following bit used to be end of tex1.c */
-
-#ifdef STAT
-void restore_trace_(halfword p, str_number s)
-{
- begin_diagnostic();
- print_char(123); /* { */
- print(s);
- print_char(32); /* */
- show_eqtb(p);
- print_char(125); /* } */
- end_diagnostic(false);
-}
-#endif /* STAT */
-void unsave (void)
-{/* 30 */
- halfword p;
- quarterword l;
- halfword t;
- if(cur_level > 1)
- {
- decr(cur_level);
- while(true){
- decr(save_ptr);
- if(save_stack[save_ptr].hh.b0 == 3)
- goto lab30;
- p = save_stack[save_ptr].hh.v.RH;
- if(save_stack[save_ptr].hh.b0 == 2)
- {
- t = cur_tok;
- cur_tok = p;
- back_input ();
- cur_tok = t;
- }
- else {
-
- if(save_stack[save_ptr].hh.b0 == 0)
- {
- l = save_stack[save_ptr].hh.b1;
- decr(save_ptr);
- }
- else save_stack[save_ptr]= eqtb[(hash_size + 781)];
- /* undefine_control_sequence */
- if(p < (hash_size + 3163))
- if(eqtb[p].hh.b1 == 1)
- {
- eq_destroy(save_stack[save_ptr]);
- ;
-#ifdef STAT
- if(eqtb[(hash_size + 3200)].cint > 0)
- restore_trace(p, 541); /* retaining */
-#endif /* STAT */
- }
- else {
-
- eq_destroy(eqtb[p]);
- eqtb[p]= save_stack[save_ptr];
- ;
-#ifdef STAT
- if(eqtb[(hash_size + 3200)].cint > 0)
- restore_trace(p, 542); /* restoring */
-#endif /* STAT */
- }
- else if(xeq_level[p]!= 1)
- {
- eqtb[p]= save_stack[save_ptr];
- xeq_level[p]= l; /* l may be used without having been ... */
- ;
-#ifdef STAT
- if(eqtb[(hash_size + 3200)].cint > 0)
- restore_trace(p, 542); /* restoring */
-#endif /* STAT */
- }
- else {
-
- ;
-#ifdef STAT
- if(eqtb[(hash_size + 3200)].cint > 0)
- restore_trace(p, 541); /* retaining */
-#endif /* STAT */
- }
- }
- }
- lab30: cur_group = save_stack[save_ptr].hh.b1;
- cur_boundary = save_stack[save_ptr].hh.v.RH;
- }
- else {
- confusion(540); /* cur_level */
- return; // abort_flag set
- }
-}
-/* This is where the old tex2.c used to start */
-void prepare_mag (void)
-{
- if((mag_set > 0)&&(eqtb[(hash_size + 3180)].cint != mag_set))
- {
- {
- if(interaction == 3)
- ;
- print_nl(266); /* ! */
- print(544); /* Incompatible magnification(*/
- }
- print_int(eqtb[(hash_size + 3180)].cint);
- print(545); /*)*/
- print_nl(546); /* the previous value will be retained */
- {
- help_ptr = 2;
- help_line[1]= 547; /* I can handle only one magnification ratio per job. */
- help_line[0]= 548; /* So I've reverted to the magnification you used earlier on this run. */
-
- }
- int_error(mag_set);
- geq_word_define((hash_size + 3180), mag_set);
- }
- if((eqtb[(hash_size + 3180)].cint <= 0)||
- (eqtb[(hash_size + 3180)].cint > 32768L))
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(549); /* Illegal magnification has been changed to 1000 */
- }
- {
- help_ptr = 1;
- help_line[0]= 550; /* The magnification ratio must be between 1 and 32768. */
- }
- int_error(eqtb[(hash_size + 3180)].cint);
- geq_word_define((hash_size + 3180), 1000);
- }
- mag_set = eqtb[(hash_size + 3180)].cint;
-}
-void token_show_ (halfword p)
-{
-/* begin if p<>null then show_token_list(link(p),null,10000000); l.6289 */
- if(p != 0)
- show_token_list(mem[p].hh.v.RH, 0, 10000000L);
-}
-void print_meaning (void)
-{
- print_cmd_chr(cur_cmd, cur_chr);
- if(cur_cmd >= 111)
- {
- print_char(58); /* : */
- print_ln ();
- token_show(cur_chr);
- }
- else if(cur_cmd == 110)
- {
- print_char(58); /* : */
- print_ln ();
- token_show(cur_mark[cur_chr]);
- }
-}
-void show_cur_cmd_chr (void)
-{
- begin_diagnostic ();
- print_nl(123); /* { */
- if(mode != shown_mode)
- {
- print_mode(mode);
- print(565); /* : */
- shown_mode = mode;
- }
- print_cmd_chr(cur_cmd, cur_chr);
- print_char(125); /* } */
- end_diagnostic(false);
-}
-void show_context (void)
-{/* 30 */
- char old_setting;
- integer nn;
- bool bottomline;
- integer i;
- integer j;
- integer l;
- integer m;
- integer n;
- integer p;
- integer q;
- base_ptr = input_ptr;
- input_stack[base_ptr] = cur_input;
- nn = -1;
- bottomline = false;
- while(true){
- cur_input = input_stack[base_ptr];
- if((cur_input.state_field != 0))
- if((cur_input.name_field > 17)||(base_ptr == 0))
- bottomline = true;
- if((base_ptr == input_ptr)|| bottomline ||
- (nn < eqtb[(hash_size + 3217)].cint))
- {
-/* begin if (base_ptr=input_ptr) or (state<>token_list) or
- (token_type<>backed_up) or (loc<>null) then
- {we omit backed-up token lists that have already been read} l.6761 */
- if((base_ptr == input_ptr)||(cur_input.state_field != 0)||(
- cur_input.index_field != 3)||(cur_input.loc_field != 0))
- {
- tally = 0;
- old_setting = selector;
- if(cur_input.state_field != 0)
- {
- if(cur_input.name_field <= 17)
- if((cur_input.name_field == 0))
- if(base_ptr == 0)print_nl(571); /* <*> */
- else print_nl(572); /* <insert> */
- else {
- print_nl(573); /* <read */
- if(cur_input.name_field == 17)
- print_char(42); /* * */
- else print_int(cur_input.name_field - 1);
- print_char(62); /* > */
- }
- else {
-/* print_nl(574); */
-/* print_int(line); */
-/* *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** */
- if (c_style_flag) { /* 94/Mar/21 */
- print_ln(); /* new line */
- /* show current input file name - ignore if from terminal */
- if (cur_input.name_field > 17) /* redundant ? */
- print(cur_input.name_field);
- print_char(40); /*(*/
- print_int(line); /* line number */
- print_char(41); /*)*/
- print_char(32); /* */
- print_char(58); /* : */
- }
- else {
- print_nl(574); /* l. ? 573 ????? 98/Dec/8 check ! */
- print_int(line); /* line number */
- }
-/* *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** */
- }
- print_char(32); /* */
- {
- l = tally;
- tally = 0;
- selector = 20;
- trick_count = 1000000L;
- }
- if(buffer[cur_input.limit_field]== eqtb[(hash_size + 3211)].cint)
- j = cur_input.limit_field;
- else j = cur_input.limit_field + 1;
- if(j > 0)
- {
- register integer for_end;
- i = cur_input.start_field;
- for_end = j - 1;
- if(i <= for_end) do
- {
- if(i == cur_input.loc_field)
- {
- first_count = tally;
- trick_count = tally + 1 + error_line - half_error_line;
- if(trick_count < error_line)
- trick_count = error_line;
- }
- print(buffer[i]);
- }
- while(i++ < for_end);
- }
- }
- else {
-
- switch(cur_input.index_field)
- {case 0 :
- print_nl(575); /* <argument> */
- break;
- case 1 :
- case 2 :
- print_nl(576); /* <template> */
- break;
- case 3 :
- if(cur_input.loc_field == 0)
- print_nl(577); /* <recently read> */
- else print_nl(578); /* <to be read again> */
- break;
- case 4 :
- print_nl(579); /* <inserted text> */
- break;
- case 5 :
- {
- print_ln ();
- print_cs(cur_input.name_field);
- }
- break;
- case 6 :
- print_nl(580); /* <output> */
- break;
- case 7 :
- print_nl(581); /* <everypar> */
- break;
- case 8 :
- print_nl(582); /* <everymath> */
- break;
- case 9 :
- print_nl(583); /* <everydisplay> */
- break;
- case 10 :
- print_nl(584); /* <everyhbox> */
- break;
- case 11 :
- print_nl(585); /* <everyvbox> */
- break;
- case 12 :
- print_nl(586); /* <everyjob> */
- break;
- case 13 :
- print_nl(587); /* <everycr> */
- break;
- case 14 :
- print_nl(588); /* <mark> */
- break;
- case 15 :
- print_nl(589); /* <write> */
- break;
- default:
- print_nl(63); /* ? */
- break;
- }
- {
- l = tally;
- tally = 0;
- selector = 20;
- trick_count = 1000000L;
- }
- if(cur_input.index_field < 5)
- show_token_list(cur_input.start_field, cur_input.loc_field, 100000L
- );
- else show_token_list(mem[cur_input.start_field].hh.v.RH,
- cur_input.loc_field, 100000L);
- }
- selector = old_setting;
- if(trick_count == 1000000L)
- {
- first_count = tally;
- trick_count = tally + 1 + error_line - half_error_line;
- if(trick_count < error_line)
- trick_count = error_line;
- }
- if(tally < trick_count)
- m = tally - first_count;
- else m = trick_count - first_count;
- if(l + first_count <= half_error_line){
- p = 0;
- n = l + first_count;
- }
- else {
- print(275); /* ... */
- p = l + first_count - half_error_line + 3;
- n = half_error_line;
- }
- {
- register integer for_end;
- q = p;
- for_end = first_count - 1;
- if(q <= for_end) do
- print_char(trick_buf[q % error_line]);
- while(q++ < for_end);
- }
- print_ln ();
- {
- register integer for_end;
- q = 1;
- for_end = n;
- if(q <= for_end)
- do print_char(32); /* */
- while(q++ < for_end);
- }
- if(m + n <= error_line)
- p = first_count + m;
- else p = first_count +(error_line - n - 3);
- {
- register integer for_end;
- q = first_count;
- for_end = p - 1;
- if(q <= for_end) do
- print_char(trick_buf[q % error_line]);
- while(q++ < for_end);
- }
- if(m + n > error_line)
- print(275); /* ... */
- incr(nn);
- }
- }
- else if(nn == eqtb[(hash_size + 3217)].cint)
- {
- print_nl(275); /* ... */
- incr(nn);
- }
- if(bottomline)
- goto lab30;
- decr(base_ptr);
- }
- lab30: cur_input = input_stack[input_ptr];
-}
-#pragma optimize("g", off) /* 98/Dec/10 experiment */
-void begin_token_list_ (halfword p, quarterword t)
-{
- {
- if(input_ptr > max_in_stack)
- {
- max_in_stack = input_ptr;
-#ifdef ALLOCATEINPUTSTACK
- if(input_ptr == current_stack_size)
- input_stack = realloc_input_stack (increment_stack_size);
- if(input_ptr == current_stack_size){ /* check again after allocation */
- overflow(590, current_stack_size);
- return; // abort_flag set
- }
-#else
- if(input_ptr == stack_size) { /* input stack - not dynamic */
- overflow(590, stack_size);
- return; // abort_flag set
- }
-#endif
- }
- input_stack[input_ptr]= cur_input;
- incr(input_ptr);
- }
- cur_input.state_field = 0;
- cur_input.start_field = p;
- cur_input.index_field = t;
- if(t >= 5)
- {
- incr(mem[p].hh.v.LH);
- if(t == 5)
- cur_input.limit_field = param_ptr;
- else {
-
- cur_input.loc_field = mem[p].hh.v.RH;
- if(eqtb[(hash_size + 3193)].cint > 1)
- {
- begin_diagnostic ();
- print_nl(335); /* */
- switch(t)
- {case 14 :
- print_esc(348); /* mark */
- break;
- case 15 :
- print_esc(591); /* write */
- break;
- default:
- print_cmd_chr(72, t + (hash_size + 1307)); /* H */
- break;
- }
- print(553); /* -> */
- token_show(p);
- end_diagnostic(false);
- }
- }
- }
- else cur_input.loc_field = p;
-}
-#pragma optimize("", on) /* 98/Dec/10 experiment */
-void end_token_list (void)
-{
- if(cur_input.index_field >= 3)
- {
- if(cur_input.index_field <= 4)
- flush_list(cur_input.start_field);
- else {
- delete_token_ref(cur_input.start_field);
- if(cur_input.index_field == 5)
- while(param_ptr > cur_input.limit_field){
- decr(param_ptr);
- flush_list(param_stack[param_ptr]);
- }
- }
- }
- else if(cur_input.index_field == 1)
- if(align_state > 500000L)align_state = 0;
- else {
- fatal_error(592); /* (interwoven alignment preambles are not allowed) */
- return; // abort_flag set
- }
- {
- decr(input_ptr);
- cur_input = input_stack[input_ptr];
- }
- {
- if(interrupt != 0){
- pause_for_instructions ();
- }
- }
-}
-void back_input (void)
-{
- halfword p;
- while((cur_input.state_field == 0)&&(cur_input.loc_field == 0)) {
- end_token_list ();
- }
- p = get_avail ();
- mem[p].hh.v.LH = cur_tok;
- if(cur_tok < 768)
- if(cur_tok < 512)
- decr(align_state);
- else incr(align_state);
- {
- if(input_ptr > max_in_stack)
- {
- max_in_stack = input_ptr;
-#ifdef ALLOCATEINPUTSTACK
- if(input_ptr == current_stack_size)
- input_stack = realloc_input_stack (increment_stack_size);
- if(input_ptr == current_stack_size){ /* check again after allocation */
- overflow(590, current_stack_size);
- return; // abort_flag set
- }
-#else
- if(input_ptr == stack_size) { /* stack size - not dynamic */
- overflow(590, stack_size);
- return; // abort_flag set
- }
-#endif
- }
- input_stack[input_ptr]= cur_input;
- incr(input_ptr);
- }
- cur_input.state_field = 0;
- cur_input.start_field = p;
- cur_input.index_field = 3;
- cur_input.loc_field = p;
-}
-void back_error (void)
-{
- OK_to_interrupt = false;
- back_input ();
- OK_to_interrupt = true;
- error ();
-}
-void ins_error (void)
-{
- OK_to_interrupt = false;
- back_input ();
- cur_input.index_field = 4;
- OK_to_interrupt = true;
- error ();
-}
-void begin_file_reading (void)
-{
- if(in_open == max_in_open){
- overflow(593, max_in_open); /* text input levels - NOT DYNAMIC */
- return; // abort_flag set
- }
-#ifdef ALLOCATEBUFFER
- if(first == current_buf_size)
- buffer = realloc_buffer (increment_buf_size);
- if(first == current_buf_size) { /* check again after allocation */
- overflow(256, current_buf_size);
- return; // abort_flag set
- }
-#else
- if(first == buf_size){
- overflow(256, buf_size); /* buffer size - not dynamic */
- return; // abort_flag set
- }
-#endif
-
- incr(in_open);
- if (in_open > high_in_open) /* 1999 Jan 17 */
- high_in_open = in_open;
- {
- if(input_ptr > max_in_stack)
- {
- max_in_stack = input_ptr;
-#ifdef ALLOCATEINPUTSTACK
- if(input_ptr == current_stack_size)
- input_stack = realloc_input_stack (increment_stack_size);
- if(input_ptr == current_stack_size){
- overflow(590, current_stack_size); /* check again after allocation */
- return; // abort_flag set
- }
-#else
- if(input_ptr == stack_size){
- overflow(590, stack_size); /* input stack - not dynamic */
- return; // abort_flag set
- }
-#endif
- }
- input_stack[input_ptr]= cur_input;
- incr(input_ptr);
- }
- cur_input.index_field = in_open;
- line_stack[cur_input.index_field]= line;
- cur_input.start_field = first;
- cur_input.state_field = 1;
- cur_input.name_field = 0;
-}
-void end_file_reading (void)
-{
- first = cur_input.start_field;
- line = line_stack[cur_input.index_field];
- if(cur_input.name_field > 17)
- (void) a_close(input_file[cur_input.index_field]);
- {
- decr(input_ptr);
- cur_input = input_stack[input_ptr];
- }
- decr(in_open);
-}
-/* called only form tex0.c */
-void clear_for_error_prompt (void)
-{
- while((cur_input.state_field != 0)&&
- (cur_input.name_field == 0)&&
- (input_ptr > 0)&&
- (cur_input.loc_field > cur_input.limit_field))
- end_file_reading ();
- print_ln ();
-}
-void check_outer_validity (void)
-{
- halfword p;
- halfword q;
- if(scanner_status != 0)
- {
- deletions_allowed = false;
- if(cur_cs != 0)
- {
- if((cur_input.state_field == 0)||(cur_input.name_field < 1)||
- (cur_input.name_field > 17))
- {
-/* begin p:=get_avail; info(p):=cs_token_flag+cur_cs; */
- p = get_avail ();
- mem[p].hh.v.LH = 4095 + cur_cs;
- begin_token_list(p, 3);
- }
- cur_cmd = 10;
- cur_chr = 32;
- }
- if(scanner_status > 1)
- {
- runaway ();
- if(cur_cs == 0)
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(601); /* File ended */
- }
- else {
-
- cur_cs = 0;
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(602); /* Forbidden control sequence found */
- }
- }
- print(603); /* while scanning */
- p = get_avail ();
- switch(scanner_status)
- {case 2 :
- {
- print(567); /* definition */
- mem[p].hh.v.LH = 637;
- }
- break;
- case 3 :
- {
- print(609); /* use */
- mem[p].hh.v.LH = par_token;
- long_state = 113;
- }
- break;
- case 4 :
- {
- print(569); /* preamble */
- mem[p].hh.v.LH = 637;
- q = p;
- p = get_avail ();
- mem[p].hh.v.RH = q;
-/* mem[p].hh.v.LH = (hash_size + 4610); */
-/* mem[p].hh.v.LH = (hash_size + 4095 + 515); */
- mem[p].hh.v.LH = (hash_size + hash_extra + 4095 + 515); /*96/Jan/10*/
- align_state = -1000000L;
- }
- break;
- case 5 :
- {
- print(570); /* text */
- mem[p].hh.v.LH = 637;
- }
- break;
- }
- begin_token_list(p, 4);
- print(604); /* of */
- sprint_cs(warning_index);
- {
- help_ptr = 4;
- help_line[3]= 605; /* I suspect you have forgotten a `}', causing me */
- help_line[2]= 606; /* to read past where you wanted me to stop. */
- help_line[1]= 607; /* I'll try to recover; but if the error is serious, */
- help_line[0]= 608; /* you'd better type `E' or `X' now and fix your file. */
- }
- error ();
- }
- else {
-
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(595); /* Incomplete */
- }
- print_cmd_chr(105, cur_if); /* i */
- print(596); /*; all text was ignored after line */
- print_int(skip_line);
- {
- help_ptr = 3;
- help_line[2]= 597; /* A forbidden control sequence occurred in skipped text. */
- help_line[1]= 598; /* This kind of error happens when you say `\if...' and forget */
- help_line[0]= 599; /* the matching `\fi'. I've inserted a `\fi'; this might work. */
- }
- if(cur_cs != 0)
- cur_cs = 0;
- else help_line[2]= 600; /* The file ended while I was skipping conditional text. */
-/* cur_tok = (hash_size + 4613); */
-/* cur_tok = (hash_size + 4095 + 518); */
- cur_tok = (hash_size + hash_extra + 4095 + 518); /* 96/Jan/10 */
- ins_error ();
- }
- deletions_allowed = true;
- }
-}
-/*****************************************************************************/
-/* get_next() moved from here to end for pragma optimize reasons 96/Sep/12 */
-void get_next(void);
-/*****************************************************************************/
-void firm_up_the_line (void)
-{
- integer k;
- cur_input.limit_field = last;
- if(eqtb[(hash_size + 3191)].cint > 0)
- if(interaction > 1) {
- ;
- print_ln ();
- if(cur_input.start_field < cur_input.limit_field) {
- register integer for_end;
- k = cur_input.start_field;
- for_end = cur_input.limit_field - 1;
- if(k <= for_end) do print(buffer[k]);
- while(k++ < for_end);
- }
- first = cur_input.limit_field;
- {
- ;
- print(615); /* => */
- term_input(615, 0);
- }
- if(last > first){
- {
- register integer for_end;
- k = first;
- for_end = last - 1;
- if(k <= for_end) do
- buffer[k + cur_input.start_field - first]= buffer[k];
- while(k++ < for_end);
- }
- cur_input.limit_field = cur_input.start_field + last - first;
- }
- }
-}
-void get_token (void)
-{
- no_new_control_sequence = false;
- get_next ();
- no_new_control_sequence = true;
- if(cur_cs == 0)cur_tok =(cur_cmd * 256)+ cur_chr;
- else cur_tok = 4095 + cur_cs;
-}
-void macro_call (void)
-{/* 10 22 30 31 40 */
- halfword r;
- halfword p;
- halfword q;
- halfword s;
- halfword t;
- halfword u, v;
- halfword rbraceptr;
- small_number n;
- halfword unbalance;
- halfword m;
- halfword refcount;
- small_number savescannerstatus;
- halfword savewarningindex;
- ASCII_code matchchr;
-
- savescannerstatus = scanner_status;
- savewarningindex = warning_index;
- warning_index = cur_cs;
- refcount = cur_chr;
- r = mem[refcount].hh.v.RH;
- n = 0;
- if(eqtb[(hash_size + 3193)].cint > 0)
- {
- begin_diagnostic ();
- print_ln ();
- print_cs(warning_index);
- token_show(refcount);
- end_diagnostic(false);
- }
- if(mem[r].hh.v.LH != 3584)
- {
- scanner_status = 3;
- unbalance = 0;
- long_state = eqtb[cur_cs].hh.b0;
- if(long_state >= 113)
- long_state = long_state - 2;
- do {
- mem[mem_top - 3].hh.v.RH = 0; /* repeat link(temp_head):=null; */
- if((mem[r].hh.v.LH > 3583)||(mem[r].hh.v.LH < 3328))
- s = 0; /* s:=null l.7984 */
- else {
-
- matchchr = mem[r].hh.v.LH - 3328;
- s = mem[r].hh.v.RH;
- r = s;
- p = mem_top - 3;
- m = 0;
- }
- lab22: get_token ();
- if(cur_tok == mem[r].hh.v.LH)
- {
- r = mem[r].hh.v.RH;
- if((mem[r].hh.v.LH >= 3328)&&(mem[r].hh.v.LH <= 3584
- ))
- {
- if(cur_tok < 512)
- decr(align_state);
- goto lab40;
- }
- else goto lab22;
- }
- if(s != r)
- if(s == 0)
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(647); /* Use of */
- }
- sprint_cs(warning_index);
- print(648); /* doesn't match its definition */
- {
- help_ptr = 4;
- help_line[3]= 649; /* If you say, e.g., `\def\a1{...}', then you must always */
- help_line[2]= 650; /* put `1' after `\a', since control sequence names are */
- help_line[1]= 651; /* made up of letters only. The macro here has not been */
- help_line[0]= 652; /* followed by the required stuff, so I'm ignoring it. */
- }
- error ();
- goto lab10;
- }
- else {
-
- t = s;
- do {
- {
- q = get_avail ();
- mem[p].hh.v.RH = q;
- mem[q].hh.v.LH = mem[t].hh.v.LH;
- p = q;
- }
- incr(m);
- u = mem[t].hh.v.RH;
- v = s;
- while(true){
- if(u == r)
- if(cur_tok != mem[v].hh.v.LH)
- goto lab30;
- else {
-
- r = mem[v].hh.v.RH;
- goto lab22;
- }
- if(mem[u].hh.v.LH != mem[v].hh.v.LH)
- goto lab30;
- u = mem[u].hh.v.RH;
- v = mem[v].hh.v.RH;
- }
- lab30: t = mem[t].hh.v.RH;
- } while(!(t == r));
- r = s;
- }
- if(cur_tok == par_token)
- if(long_state != 112)
- {
- if(long_state == 111)
- {
- runaway ();
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(642); /* Paragraph ended before */
- }
- sprint_cs(warning_index);
- print(643); /* was complete */
- {
- help_ptr = 3;
- help_line[2]= 644; /* I suspect you've forgotten a `}', causing me to apply this */
- help_line[1]= 645; /* control sequence to too much text. How can we recover? */
- help_line[0]= 646; /* My plan is to forget the whole thing and hope for the best. */
- }
- back_error ();
- }
- pstack[n]= mem[mem_top - 3].hh.v.RH;
- align_state = align_state - unbalance;
- {
- register integer for_end;
- m = 0;
- for_end = n;
- if(m <= for_end) do
- flush_list(pstack[m]);
- while(m++ < for_end);
- }
- goto lab10;
- }
- if(cur_tok < 768)
- if(cur_tok < 512)
- {
- unbalance = 1;
- while(true){
- {
- {
- q = avail;
- if(q == 0)
- q = get_avail ();
- else {
-
- avail = mem[q].hh.v.RH;
- mem[q].hh.v.RH = 0;
- ;
-#ifdef STAT
- incr(dyn_used);
-#endif /* STAT */
- }
- }
- mem[p].hh.v.RH = q;
- mem[q].hh.v.LH = cur_tok;
- p = q;
- }
- get_token ();
- if(cur_tok == par_token)
- if(long_state != 112)
- {
- if(long_state == 111)
- {
- runaway ();
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(642); /* Paragraph ended before */
- }
- sprint_cs(warning_index);
- print(643); /* was complete */
- {
- help_ptr = 3;
- help_line[2]= 644; /* I suspect you've forgotten a `}', causing me to apply this */
- help_line[1]= 645; /* control sequence to too much text. How can we recover? */
- help_line[0]= 646; /* My plan is to forget the whole thing and hope for the best. */
- }
- back_error ();
- }
- pstack[n]= mem[mem_top - 3].hh.v.RH;
- align_state = align_state - unbalance;
- {
- register integer for_end;
- m = 0;
- for_end = n;
- if(m <= for_end) do
- flush_list(pstack[m]);
- while(m++ < for_end);
- }
- goto lab10;
- }
- if(cur_tok < 768)
- if(cur_tok < 512)
- incr(unbalance);
- else {
-
- decr(unbalance);
- if(unbalance == 0)
- goto lab31;
- }
- }
- lab31: rbraceptr = p;
- {
- q = get_avail ();
- mem[p].hh.v.RH = q;
- mem[q].hh.v.LH = cur_tok;
- p = q;
- }
- }
- else {
-
- back_input ();
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(634); /* Argument of */
- }
- sprint_cs(warning_index);
- print(635); /* has an extra } */
- {
- help_ptr = 6;
- help_line[5]= 636; /* I've run across a `}' that doesn't seem to match anything. */
- help_line[4]= 637; /* For example, `\def\a#1{...}' and `\a}' would produce */
- help_line[3]= 638; /* this error. If you simply proceed now, the `\par' that */
- help_line[2]= 639; /* I've just inserted will cause me to report a runaway */
- help_line[1]= 640; /* argument that might be the root of the problem. But if */
- help_line[0]= 641; /* your `}' was spurious, just type `2' and it will go away. */
- }
- incr(align_state);
- long_state = 111;
- cur_tok = par_token;
- ins_error ();
- }
- else {
-
- if(cur_tok == 2592)
- if(mem[r].hh.v.LH <= 3584)
- if(mem[r].hh.v.LH >= 3328)
- goto lab22;
- {
- q = get_avail ();
- mem[p].hh.v.RH = q; /* p may be used without having ... */
- mem[q].hh.v.LH = cur_tok;
- p = q;
- }
- }
- incr(m); /* m may be used without having been ... */
- if(mem[r].hh.v.LH > 3584)
- goto lab22;
- if(mem[r].hh.v.LH < 3328)
- goto lab22;
- lab40: if(s != 0)
- {
- if((m == 1)&&(mem[p].hh.v.LH < 768)&&(p != mem_top - 3
- ))
- {
- mem[rbraceptr].hh.v.RH = 0; /* rbraceptr may be used without ... */
- {
- mem[p].hh.v.RH = avail;
- avail = p;
- ;
-#ifdef STAT
- decr(dyn_used);
-#endif /* STAT */
- }
- p = mem[mem_top - 3].hh.v.RH;
- pstack[n]= mem[p].hh.v.RH;
- {
- mem[p].hh.v.RH = avail;
- avail = p;
- ;
-#ifdef STAT
- decr(dyn_used);
-#endif /* STAT */
- }
- }
- else pstack[n]= mem[mem_top - 3].hh.v.RH;
- incr(n);
- if(eqtb[(hash_size + 3193)].cint > 0)
- {
- begin_diagnostic ();
- print_nl(matchchr); /* matchchar may be used without ... */
- print_int(n);
- print(653); /* <- */
- show_token_list(pstack[n - 1], 0, 1000);
- end_diagnostic(false);
- }
- }
- } while(!(mem[r].hh.v.LH == 3584));
- }
-/* while (state=token_list)and(loc=null) do end_token_list; l.7956 */
- while((cur_input.state_field == 0)&&(cur_input.loc_field == 0))
- end_token_list ();
- begin_token_list(refcount, 5);
- cur_input.name_field = warning_index;
- cur_input.loc_field = mem[r].hh.v.RH;
- if(n > 0)
- {
- if(param_ptr + n > max_param_stack)
- {
- max_param_stack = param_ptr + n;
-#ifdef ALLOCATEPARAMSTACK
- if(max_param_stack > current_param_size)
- param_stack = realloc_param_stack (increment_param_size);
- if(max_param_stack > current_param_size){ /* check again after allocation */
- overflow(633, current_param_size);
- return; // abort_flag set
- }
-#else
- if(max_param_stack > param_size){
- overflow(633, param_size); /* parameter stack - not dynamic */
- return; // abort_flag set
- }
-#endif
- }
- {
- register integer for_end;
- m = 0;
- for_end = n - 1;
- if(m <= for_end)
- do param_stack[param_ptr + m]= pstack[m];
- while(m++ < for_end);
- }
- param_ptr = param_ptr + n;
- }
- lab10: scanner_status = savescannerstatus;
- warning_index = savewarningindex;
-}
-void insert_relax (void)
-{
-/* begin cur_tok:=cs_token_flag+cur_cs; back_input; */
- cur_tok = 4095 + cur_cs;
- back_input ();
-/* cur_tok:=cs_token_flag+frozen_relax; back_input; token_type:=inserted; */
-/* cur_tok = (hash_size + 4616); */
-/* cur_tok = (hash_size + 4095 + 521); */
- cur_tok = (hash_size + hash_extra + 4095 + 521); /* 96/Jan/10 */
- back_input ();
- cur_input.index_field = 4;
-}
-void expand (void)
-{
- halfword t;
- halfword p, q, r;
- integer j;
- integer cvbackup;
- small_number cvlbackup, radixbackup, cobackup;
- halfword backupbackup;
- small_number savescannerstatus;
-
- cvbackup = cur_val;
- cvlbackup = cur_val_level;
- radixbackup = radix;
- cobackup = cur_order;
- backupbackup = mem[mem_top - 13].hh.v.RH;
- if(cur_cmd < 111)
- {
- if(eqtb[(hash_size + 3199)].cint > 1)
- show_cur_cmd_chr ();
- switch(cur_cmd)
- {case 110 :
- {
-/* begin if cur_mark[cur_chr]<>null then l.7881 */
- if(cur_mark[cur_chr]!= 0)
- begin_token_list(cur_mark[cur_chr], 14);
- }
- break;
- case 102 :
- {
- get_token ();
- t = cur_tok;
- get_token ();
- if(cur_cmd > 100){
- expand ();
- }
- else back_input ();
- cur_tok = t;
- back_input ();
- }
- break;
- case 103 :
- {
- savescannerstatus = scanner_status;
- scanner_status = 0;
- get_token ();
- scanner_status = savescannerstatus;
- t = cur_tok;
- back_input ();
- if(t >= 4095) /* if t>=cs_token_flag then */
- {
-/* begin p:=get_avail; info(p):=cs_token_flag+frozen_dont_expand; */
- p = get_avail ();
-/* mem[p].hh.v.LH = (hash_size + 4618); */
-/* mem[p].hh.v.LH = (hash_size + 4095 + 523); */
- mem[p].hh.v.LH = (hash_size + hash_extra + 4095 + 523); /*96/Jan/10*/
- mem[p].hh.v.RH = cur_input.loc_field;
- cur_input.start_field = p;
- cur_input.loc_field = p;
- }
- }
- break;
- case 107 :
- {
- r = get_avail ();
- p = r;
- do {
- get_x_token ();
- if(cur_cs == 0){
- q = get_avail ();
- mem[p].hh.v.RH = q;
- mem[q].hh.v.LH = cur_tok;
- p = q;
- }
- } while(!(cur_cs != 0));
- if(cur_cmd != 67)
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(622); /* Missing */
- }
- print_esc(502); /* endcsname */
- print(623); /* inserted */
- {
- help_ptr = 2;
- help_line[1]= 624; /* The control sequence marked <to be read again> should */
- help_line[0]= 625; /* not appear between \csname and \endcsname. */
- }
- back_error ();
- }
- j = first;
- p = mem[r].hh.v.RH;
- while(p != 0){ /* while p<>null do l.7742 */
-
- if(j >= max_buf_stack)
- {
- max_buf_stack = j + 1;
-#ifdef ALLOCATEBUFFER
- if(max_buf_stack == current_buf_size)
- buffer = realloc_buffer (increment_buf_size);
- if(max_buf_stack == current_buf_size){ /* check again after allocation */
- overflow(256, current_buf_size);
- return; // abort_flag set
- }
-#else
- if(max_buf_stack == buf_size){
- overflow(256, buf_size); /* buffer size - not dynamic */
- return; // abort_flag set
- }
-#endif
- }
- buffer[j]= mem[p].hh.v.LH % 256;
-/* buffer[j]= mem[p].hh.v.LH & 255; */ /* last 8 bits */
- incr(j);
- p = mem[p].hh.v.RH;
- }
- if(j > first + 1)
- {
- no_new_control_sequence = false;
- cur_cs = id_lookup(first, j - first);
- no_new_control_sequence = true;
- }
- else if(j == first)
- cur_cs = 513;
-/* else cur_cs:=single_base+buffer[first] {the list has length one} */
- else cur_cs = 257 + buffer[first];
- flush_list(r);
- if(eqtb[cur_cs].hh.b0 == 101)
- {
- eq_define(cur_cs, 0, 256);
- }
- cur_tok = cur_cs + 4095;
- back_input ();
- }
- break;
- case 108 :
- conv_toks ();
- break;
- case 109 :
- ins_the_toks ();
- break;
- case 105 :
- conditional ();
- break;
- case 106 :
- if(cur_chr > if_limit)
- if(if_limit == 1)
- insert_relax ();
- else {
-
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(773); /* Extra */
- }
- print_cmd_chr(106, cur_chr); /* j */
- {
- help_ptr = 1;
- help_line[0]= 774; /* I'm ignoring this; it doesn't match any \if. */
- }
- error ();
- }
- else {
-
- while(cur_chr != 2)pass_text ();
- {
- p = cond_ptr;
- if_line = mem[p + 1].cint;
- cur_if = mem[p].hh.b1;
- if_limit = mem[p].hh.b0;
- cond_ptr = mem[p].hh.v.RH;
- free_node(p, 2);
- }
- }
- break;
- case 104 :
- if(cur_chr > 0)force_eof = true;
- else if(name_in_progress)insert_relax ();
- else start_input ();
- break;
- default:
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(616); /* Undefined control sequence */
- }
- {
- help_ptr = 5;
- help_line[4]= 617; /* The control sequence at the end of the top line */
- help_line[3]= 618; /* of your error message was never \def'ed. If you have */
- help_line[2]= 619; /* misspelled it (e.g., `\hobx'), type `I' and the correct */
- help_line[1]= 620; /* spelling (e.g., `I\hbox'). Otherwise just continue, */
- help_line[0]= 621; /* and I'll forget about whatever was undefined. */
- }
- error ();
- }
- break;
- }
- }
- else if(cur_cmd < 115){
- macro_call ();
- }
- else {
-
-/* cur_tok = (hash_size + 4615); */
-/* cur_tok = (hash_size + 4095 + 520); */
- cur_tok = (hash_size + hash_extra + 4095 + 520); /* 96/Jan/10 */
- back_input ();
- }
- cur_val = cvbackup;
- cur_val_level = cvlbackup;
- radix = radixbackup;
- cur_order = cobackup;
- mem[mem_top - 13].hh.v.RH = backupbackup;
-}
-void get_x_token (void)
-{/* 20 30 */
-
-lab20:
- get_next ();
- if(cur_cmd <= 100) goto lab30;
- if(cur_cmd >= 111)
- if(cur_cmd < 115){
- macro_call ();
- }
- else {
-/* cur_cs = (hash_size + 520); */
- cur_cs = (hash_size + hash_extra + 520); /* 96/Jan/10 */
- cur_cmd = 9;
- goto lab30;
- }
- else {
- expand ();
- }
- goto lab20;
-lab30: if(cur_cs == 0)
- cur_tok =(cur_cmd * 256)+ cur_chr;
- else cur_tok = 4095 + cur_cs;
-}
-void x_token (void)
-{
- while(cur_cmd > 100){
- expand ();
- get_next ();
- }
- if(cur_cs == 0)
- cur_tok =(cur_cmd * 256)+ cur_chr;
- else cur_tok = 4095 + cur_cs;
-}
-void scan_left_brace (void)
-{
- do {
- get_x_token ();
- } while(!((cur_cmd != 10)&&(cur_cmd != 0)));
- if(cur_cmd != 1)
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(654); /* Missing { inserted */
- }
- {
- help_ptr = 4;
- help_line[3]= 655; /* A left brace was mandatory here, so I've put one in. */
- help_line[2]= 656; /* You might want to delete and/or insert some corrections */
- help_line[1]= 657; /* so that I will find a matching right brace soon. */
- help_line[0]= 658; /* (If you're confused by all this, try typing `I}' now.) */
- }
- back_error ();
- cur_tok = 379;
- cur_cmd = 1;
- cur_chr = 123;
- incr(align_state);
- }
-}
-void scan_optional_equals (void)
-{
- do {
- get_x_token ();
- } while(!(cur_cmd != 10));
- if(cur_tok != 3133)back_input ();
-}
-bool scan_keyword_(str_number s)
-{/* 10 */ register bool Result;
- halfword p;
- halfword q;
- pool_pointer k;
- p = mem_top - 13;
- mem[p].hh.v.RH = 0;
- k = str_start[s];
- while(k < str_start[s + 1]){
- get_x_token ();
- if((cur_cs == 0)&&((cur_chr == str_pool[k])||(cur_chr ==
- str_pool[k]- 32))) {
- {
- q = get_avail ();
- mem[p].hh.v.RH = q;
- mem[q].hh.v.LH = cur_tok;
- p = q;
- }
- incr(k);
- }
- else if((cur_cmd != 10)||(p != mem_top - 13))
- {
- back_input ();
- if(p != mem_top - 13)
- begin_token_list(mem[mem_top - 13].hh.v.RH, 3);
- Result = false;
- return(Result);
- }
- }
- flush_list(mem[mem_top - 13].hh.v.RH);
- Result = true;
- return Result;
-}
-void mu_error (void)
-{
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(659); /* Incompatible glue units */
- }
- {
- help_ptr = 1;
- help_line[0]= 660; /* I'm going to assume that 1mu=1pt when they're mixed. */
- }
- error ();
-}
-void scan_eight_bit_int (void)
-{
- scan_int ();
- if((cur_val < 0)||(cur_val > 255))
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(684); /* Bad register code */
- }
- {
- help_ptr = 2;
- help_line[1]= 685; /* A register number must be between 0 and 255. */
- help_line[0]= 686; /* I changed this one to zero. */
- }
- int_error(cur_val);
- cur_val = 0;
- }
-}
-void scan_char_num (void)
-{
- scan_int ();
- if((cur_val < 0)||(cur_val > 255))
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(687); /* Bad character code */
- }
- {
- help_ptr = 2;
- help_line[1]= 688; /* A character number must be between 0 and 255. */
- help_line[0]= 686; /* I changed this one to zero. */
- }
- int_error(cur_val);
- cur_val = 0;
- }
-}
-void scan_four_bit_int (void)
-{
- scan_int ();
- if((cur_val < 0)||(cur_val > 15))
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(689); /* Bad number */
- }
- {
- help_ptr = 2;
- help_line[1]= 690; /* Since I expected to read a number between 0 and 15, */
- help_line[0]= 686; /* I changed this one to zero. */
- }
- int_error(cur_val);
- cur_val = 0;
- }
-}
-void scan_fifteen_bit_int (void)
-{
- scan_int ();
- if((cur_val < 0)||(cur_val > 32767))
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(691); /* Bad mathchar */
- }
- {
- help_ptr = 2;
- help_line[1]= 692; /* A mathchar number must be between 0 and 32767. */
- help_line[0]= 686; /* I changed this one to zero. */
- }
- int_error(cur_val);
- cur_val = 0;
- }
-}
-void scan_twenty_seven_bit_int (void)
-{
- scan_int ();
- if((cur_val < 0)||(cur_val > 134217727L)) /* 2^27 - 1 */
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(693); /* Bad delimiter code */
- }
- {
- help_ptr = 2;
- help_line[1]= 694; /* A numeric delimiter code must be between 0 and 2^{27}-1. */
- help_line[0]= 686; /* I changed this one to zero. */
- }
- int_error(cur_val);
- cur_val = 0;
- }
-}
-void scan_font_ident (void)
-{
- internal_font_number f;
- halfword m;
- do {
- get_x_token ();
- } while(!(cur_cmd != 10));
- if(cur_cmd == 88)
- f = eqtb[(hash_size + 1834)].hh.v.RH;
- else if(cur_cmd == 87)
- f = cur_chr;
- else if(cur_cmd == 86)
- {
- m = cur_chr;
- scan_four_bit_int ();
- f = eqtb[m + cur_val].hh.v.RH;
- }
- else {
-
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(811); /* Missing font identifier */
- }
- {
- help_ptr = 2;
- help_line[1]= 812; /* I was looking for a control sequence whose */
- help_line[0]= 813; /* current meaning has been defined by \font. */
- }
- back_error ();
- f = 0;
- }
- cur_val = f;
-}
-void find_font_dimen_(bool writing)
-{
- internal_font_number f;
- integer n;
- scan_int ();
- n = cur_val;
- scan_font_ident ();
- f = cur_val;
-/* if(n <= 0)*/ /* change 98/Oct/5 */
- if(n < 0 || (n == 0 && font_dimen_zero == 0))
- cur_val = fmem_ptr;
- else {
-/* else begin if writing and(n<=space_shrink_code)and@|
- (n>=space_code)and(font_glue[f]<>null) then
- begin delete_glue_ref(font_glue[f]); l.11225 */
- if(writing &&(n <= 4)&&(n >= 2)&&(font_glue[f]!= 0))
- {
- delete_glue_ref(font_glue[f]);
- font_glue[f]= 0; /* font_glue[f]:=null */
- }
- if(n > font_params[f])
- if(f < font_ptr)
- cur_val = fmem_ptr;
- else {
- do {
-/* *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** */
- #ifdef ALLOCATEFONT
- if(fmem_ptr == current_font_mem_size) { /* 93/Nov/28 ??? */
- font_info = realloc_font_info(increment_font_mem_size);
- }
- if(fmem_ptr == current_font_mem_size){ /* 94/Jan/24 */
- overflow(818, current_font_mem_size); /* font memory */
- return; // abort_flag set
- }
-#else
-/* *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** */
- if(fmem_ptr == font_mem_size){
- overflow(818, font_mem_size); /* font memory */
- return; // abort_flag set
- }
-#endif
- font_info[fmem_ptr].cint = 0;
- incr(fmem_ptr);
- incr(font_params[f]);
- } while(!(n == font_params[f]));
- cur_val = fmem_ptr - 1;
- }
-/* else cur_val = n + param_base[f]; */ /* 98/Oct/5 */
- else if (n > 0) cur_val = n + param_base[f]; /* 98/Oct/5 */
- else cur_val = &font_check[f] - &font_info[0]; /* 98/Oct/5 */
-/* checksum = (((font_check[f].b0) << 8 | font_check[f].b1) << 8 |
- font_check[f].b2) << 8 | font_check[f].b3; */
- }
-/* compiler error: '-' : incompatible types - from 'union fmemoryword *' to 'struct fourunsignedchars *' */
- if(cur_val == fmem_ptr){
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(796); /* Font */
- }
-/* print_esc(hash[(hash_size + 524) + f].v.RH); */
- print_esc(hash[(hash_size + hash_extra + 524) + f].v.RH); /*96/Jan/10*/
- print(814); /* has only */
- print_int(font_params[f]);
- print(815); /* fontdimen parameters */
- {
- help_ptr = 2;
- help_line[1]= 816; /* To increase the number of font parameters, you must */
- help_line[0]= 817; /* use \fontdimen immediately after the \font is loaded. */
- }
- error ();
- }
-}
-
-/* NOTE: the above use of /fontdimen0 to access the checksum is a kludge */
-/* In future would be better to do this by allocating one more slot for */
-/* for parameters when a font is read rather than carry checksum separately */
-/* The above gets the value byte order reversed ... 98/Oct/5 */
-
-void scan_something_internal_(small_number level, bool negative)
-{
- halfword m;
- integer p;
- m = cur_chr;
- switch(cur_cmd)
- {case 85 :
- {
- scan_char_num ();
- if(m == (hash_size + 2907))
- {
- cur_val = eqtb[(hash_size + 2907) + cur_val].hh.v.RH;
- cur_val_level = 0;
- }
- else if(m < (hash_size + 2907))
- {
- cur_val = eqtb[m + cur_val].hh.v.RH;
- cur_val_level = 0;
- }
- else {
-
- cur_val = eqtb[m + cur_val].cint;
- cur_val_level = 0;
- }
- }
- break;
- case 71 :
- case 72 :
- case 86 :
- case 87 :
- case 88 :
- if(level != 5)
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(661); /* Missing number, treated as zero */
- }
- {
- help_ptr = 3;
- help_line[2]= 662; /* A number should have been here; I inserted `0'. */
- help_line[1]= 663; /* (If you can't figure out why I needed to see a number, */
- help_line[0]= 664; /* look up `weird error' in the index to The TeXbook.) */
- }
- back_error ();
- {
- cur_val = 0;
- cur_val_level = 1;
- }
- }
- else if(cur_cmd <= 72)
- {
- if(cur_cmd < 72)
- {
- scan_eight_bit_int ();
- m = (hash_size + 1322) + cur_val;
- }
- {
- cur_val = eqtb[m].hh.v.RH;
- cur_val_level = 5;
- }
- }
- else {
-
- back_input ();
- scan_font_ident ();
- {
-/* cur_val = (hash_size + 524) + cur_val; */
- cur_val = (hash_size + hash_extra + 524) + cur_val; /* 96/Jan/10 */
- cur_val_level = 4;
- }
- }
- break;
- case 73 :
- {
- cur_val = eqtb[m].cint;
- cur_val_level = 0;
- }
- break;
- case 74 :
- {
- cur_val = eqtb[m].cint;
- cur_val_level = 1;
- }
- break;
- case 75 :
- {
- cur_val = eqtb[m].hh.v.RH;
- cur_val_level = 2;
- }
- break;
- case 76 :
- {
- cur_val = eqtb[m].hh.v.RH;
- cur_val_level = 3;
- }
- break;
- case 79 :
- if(abs(mode)!= m)
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(677); /* Improper */
- }
- print_cmd_chr(79, m); /* O */
- {
- help_ptr = 4;
- help_line[3]= 678; /* You can refer to \spacefactor only in horizontal mode; */
- help_line[2]= 679; /* you can refer to \prevdepth only in vertical mode; and */
- help_line[1]= 680; /* neither of these is meaningful inside \write. So */
- help_line[0]= 681; /* I'm forgetting what you said and using zero instead. */
- }
- error ();
- if(level != 5) {
- cur_val = 0;
- cur_val_level = 1;
- }
- else {
-
- cur_val = 0;
- cur_val_level = 0;
- }
- }
- else if(m == 1)
- {
- cur_val = cur_list.aux_field.cint;
- cur_val_level = 1;
- }
- else {
-
- cur_val = space_factor;
- cur_val_level = 0;
- }
- break;
- case 80 :
- if(mode == 0)
- {
- cur_val = 0;
- cur_val_level = 0;
- }
- else {
-
- nest[nest_ptr]= cur_list;
- p = nest_ptr;
- while(abs(nest[p].mode_field)!= 1)decr(p);
- {
- cur_val = nest[p].pg_field;
- cur_val_level = 0;
- }
- }
- break;
- case 82 :
- {
- if(m == 0)
- cur_val = dead_cycles;
- else cur_val = insert_penalties;
- cur_val_level = 0;
- }
- break;
- case 81 :
- {
- if((page_contents == 0)&&(! output_active))
- if(m == 0)
- cur_val = 1073741823L; /* 2^30 - 1 */
- else cur_val = 0;
- else cur_val = page_so_far[m];
- cur_val_level = 1;
- }
- break;
- case 84 :
- {
- if(eqtb[(hash_size + 1312)].hh.v.RH == 0)
- cur_val = 0;
- else cur_val = mem[eqtb[(hash_size + 1312)].hh.v.RH].hh.v.LH;
- cur_val_level = 0;
- }
- break;
- case 83 :
- {
- scan_eight_bit_int ();
- if(eqtb[(hash_size + 1578) + cur_val].hh.v.RH == 0)
- cur_val = 0;
- else cur_val = mem[eqtb[(hash_size + 1578) + cur_val].hh.v.RH + m].cint;
- cur_val_level = 1;
- }
- break;
- case 68 :
- case 69 :
- {
- cur_val = cur_chr;
- cur_val_level = 0;
- }
- break;
- case 77 :
- {
- find_font_dimen(false);
- font_info[fmem_ptr].cint = 0;
- {
- cur_val = font_info[cur_val].cint;
- cur_val_level = 1;
- }
- }
- break;
- case 78 :
- {
- scan_font_ident ();
- if(m == 0){
- cur_val = hyphen_char[cur_val];
- cur_val_level = 0;
- }
- else {
-
- cur_val = skew_char[cur_val];
- cur_val_level = 0;
- }
- }
- break;
- case 89 :
- {
- scan_eight_bit_int ();
- switch(m)
- {case 0 :
- cur_val = eqtb[(hash_size + 3218) + cur_val].cint;
- break;
- case 1 :
- cur_val = eqtb[(hash_size + 3751) + cur_val].cint;
- break;
- case 2 :
- cur_val = eqtb[(hash_size + 800) + cur_val].hh.v.RH;
- break;
- case 3 :
- cur_val = eqtb[(hash_size + 1056) + cur_val].hh.v.RH;
- break;
- }
- cur_val_level = m;
- }
- break;
- case 70 :
- if(cur_chr > 2)
- {
- if(cur_chr == 3)
- cur_val = line;
- else cur_val = last_badness;
- cur_val_level = 0;
- }
- else {
-
- if(cur_chr == 2)
- cur_val = 0;
- else cur_val = 0;
- cur_val_level = cur_chr;
- if(!(tail >= hi_mem_min)&&(mode != 0)
- )
- switch(cur_chr)
- {case 0 :
- if(mem[tail].hh.b0 == 12)
- cur_val = mem[tail + 1].cint;
- break;
- case 1 :
- if(mem[tail].hh.b0 == 11)
- cur_val = mem[tail + 1].cint;
- break;
- case 2 :
- if(mem[tail].hh.b0 == 10)
- {
- cur_val = mem[tail + 1].hh.v.LH;
- if(mem[tail].hh.b1 == 99)
- cur_val_level = 3;
- }
- break;
- }
- else if((mode == 1)&&(tail == cur_list
- .head_field))
- switch(cur_chr)
- {case 0 :
- cur_val = last_penalty;
- break;
- case 1 :
- cur_val = last_kern;
- break;
- case 2 :
-/* if(last_glue != 262143L) */ /* NO! */
- if(last_glue != empty_flag)
- cur_val = last_glue;
- break;
- }
- }
- break;
- default:
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(682); /* You can't use ` */
- }
- print_cmd_chr(cur_cmd, cur_chr);
- print(683); /* ' after */
- print_esc(534); /* the */
- {
- help_ptr = 1;
- help_line[0]= 681; /* I'm forgetting what you said and using zero instead. */
- }
- error ();
- if(level != 5){
- cur_val = 0;
- cur_val_level = 1;
- }
- else {
- cur_val = 0;
- cur_val_level = 0;
- }
- }
- break;
- }
- while(cur_val_level > level){
-
- if(cur_val_level == 2)
- cur_val = mem[cur_val + 1].cint;
- else if(cur_val_level == 3){
- mu_error ();
- }
- decr(cur_val_level);
- }
- if(negative)
- if(cur_val_level >= 2)
- {
- cur_val = new_spec(cur_val);
- {
- mem[cur_val + 1].cint = - (integer) mem[cur_val + 1].cint;
- mem[cur_val + 2].cint = - (integer) mem[cur_val + 2].cint;
- mem[cur_val + 3].cint = - (integer) mem[cur_val + 3].cint;
- }
- }
- else cur_val = - (integer) cur_val;
- else if((cur_val_level >= 2)&&(cur_val_level <= 3))
- incr(mem[cur_val].hh.v.RH);
-}
-
-/*****************************************************************************/
-
-/* Moved here to avoid question about pragma optimize 96/Sep/12 */
-
-/* #pragma optimize ("a", off) */
-
-void get_next (void)
-{/* 20 25 21 26 40 10 */
- integer k;
- halfword t;
-/* char cat; */ /* make this an int ? */
- int cat; /* make this an int ? 95/Jan/7 */
- ASCII_code c, cc;
- char d;
-
-lab20:
- cur_cs = 0;
- if(cur_input.state_field != 0) {
- lab25: if(cur_input.loc_field <= cur_input.limit_field) {
- cur_chr = buffer[cur_input.loc_field];
- incr(cur_input.loc_field);
- lab21: cur_cmd = eqtb[(hash_size + 1883) + cur_chr].hh.v.RH;
- switch(cur_input.state_field + cur_cmd)
- {case 10 :
- case 26 :
- case 42 :
- case 27 :
- case 43 :
- goto lab25;
- break;
- case 1 :
- case 17 :
- case 33 :
- {
- if(cur_input.loc_field > cur_input.limit_field)
- cur_cs = 513;
- else {
-
- lab26: k = cur_input.loc_field;
- cur_chr = buffer[k];
- cat = eqtb[(hash_size + 1883) + cur_chr].hh.v.RH;
- incr(k);
- if(cat == 11)
- cur_input.state_field = 17;
- else if(cat == 10)
- cur_input.state_field = 17;
- else cur_input.state_field = 1;
- if((cat == 11)&&(k <= cur_input.limit_field))
- {
- do {
- cur_chr = buffer[k];
- cat = eqtb[(hash_size + 1883) + cur_chr].hh.v.RH;
- incr(k);
- } while(!((cat != 11)||(k > cur_input.limit_field)))
- ;
- {
- if(buffer[k]== cur_chr)
- if(cat == 7)
- if(k < cur_input.limit_field)
- {
- c = buffer[k + 1];
- if(c < 128)
- {
- d = 2;
- if((((c >= 48)&&(c <= 57)) ||((c >= 97)&&
- (c <= 102))))
- if(k + 2 <= cur_input.limit_field)
- {
- cc = buffer[k + 2];
- if((((cc >= 48)&&(cc <= 57)) ||((cc >= 97
- )&&(cc <= 102))))
- incr(d);
- }
- if(d > 2)
- {
- if(c <= 57)
- cur_chr = c - 48;
- else cur_chr = c - 87;
- if(cc <= 57)
- cur_chr = 16 * cur_chr + cc - 48;
- else cur_chr = 16 * cur_chr + cc - 87;
- buffer[k - 1]= cur_chr;
- }
- else if(c < 64)
- buffer[k - 1]= c + 64;
- else buffer[k - 1]= c - 64;
- cur_input.limit_field = cur_input.limit_field - d;
- first = first - d;
- while(k <= cur_input.limit_field){
-
- buffer[k]= buffer[k + d];
- incr(k);
- }
- goto lab26;
- }
- }
- }
- if(cat != 11)
- decr(k);
- if(k > cur_input.loc_field + 1)
- {
- cur_cs = id_lookup(cur_input.loc_field, k - cur_input.loc_field
- );
- cur_input.loc_field = k;
- goto lab40;
- }
- }
- else {
-
- if(buffer[k]== cur_chr)
- if(cat == 7)
- if(k < cur_input.limit_field)
- {
- c = buffer[k + 1];
- if(c < 128) /* ? */
- {
- d = 2;
- if((((c >= 48)&&(c <= 57)) ||((c >= 97)&&(
- c <= 102))))
- if(k + 2 <= cur_input.limit_field)
- {
- cc = buffer[k + 2];
- if((((cc >= 48)&&(cc <= 57)) ||((cc >= 97)
- &&(cc <= 102))))
- incr(d);
- }
- if(d > 2)
- {
- if(c <= 57)
- cur_chr = c - 48;
- else cur_chr = c - 87;
- if(cc <= 57) /* cc may be used without ... */
- cur_chr = 16 * cur_chr + cc - 48;
- else cur_chr = 16 * cur_chr + cc - 87;
- buffer[k - 1]= cur_chr;
- }
- else if(c < 64)
- buffer[k - 1]= c + 64;
- else buffer[k - 1]= c - 64;
- cur_input.limit_field = cur_input.limit_field - d;
- first = first - d;
- while(k <= cur_input.limit_field){
- buffer[k]= buffer[k + d];
- incr(k);
- }
- goto lab26;
- }
- }
- }
-/* cur_cs:=single_base+buffer[loc]; incr(loc); */
- cur_cs = 257 + buffer[cur_input.loc_field];
- incr(cur_input.loc_field);
- }
- lab40: cur_cmd = eqtb[cur_cs].hh.b0;
- cur_chr = eqtb[cur_cs].hh.v.RH;
- if(cur_cmd >= 113){
- check_outer_validity ();
- }
- }
- break;
- case 14 :
- case 30 :
- case 46 :
- {
- cur_cs = cur_chr + 1;
- cur_cmd = eqtb[cur_cs].hh.b0;
- cur_chr = eqtb[cur_cs].hh.v.RH;
- cur_input.state_field = 1;
- if(cur_cmd >= 113){
- check_outer_validity ();
- }
- }
- break;
- case 8 :
- case 24 :
- case 40 :
- {
- if(cur_chr == buffer[cur_input.loc_field])
- if(cur_input.loc_field < cur_input.limit_field)
- {
- c = buffer[cur_input.loc_field + 1];
- if(c < 128)
- {
- cur_input.loc_field = cur_input.loc_field + 2;
- if((((c >= 48)&&(c <= 57)) ||((c >= 97)&&(c <=
- 102))))
- if(cur_input.loc_field <= cur_input.limit_field)
- {
- cc = buffer[cur_input.loc_field];
- if((((cc >= 48)&&(cc <= 57)) ||((cc >= 97)&&(
- cc <= 102))))
- {
- incr(cur_input.loc_field);
- if(c <= 57)
- cur_chr = c - 48;
- else cur_chr = c - 87;
- if(cc <= 57)
- cur_chr = 16 * cur_chr + cc - 48;
- else cur_chr = 16 * cur_chr + cc - 87;
- goto lab21;
- }
- }
- if(c < 64)
- cur_chr = c + 64;
- else cur_chr = c - 64;
- goto lab21;
- }
- }
- cur_input.state_field = 1;
- }
- break;
- case 16 :
- case 32 :
- case 48 :
- {
- {
- if(interaction == 3)
- ;
- print_nl(262); /* ! */
- print(610); /* Text line contains an invalid character */
- }
- {
- help_ptr = 2;
- help_line[1]= 611; /* A funny symbol that I can't read has just been input. */
- help_line[0]= 612; /* Continue, and I'll forget that it ever happened. */
- }
- deletions_allowed = false;
- error ();
- deletions_allowed = true;
- goto lab20;
- }
- break;
- case 11 :
- {
- cur_input.state_field = 17;
- cur_chr = 32;
- }
- break;
- case 6 :
- {
- cur_input.loc_field = cur_input.limit_field + 1;
- cur_cmd = 10;
- cur_chr = 32;
- }
- break;
- case 22 :
- case 15 :
- case 31 :
- case 47 :
- {
- cur_input.loc_field = cur_input.limit_field + 1;
- goto lab25;
- }
- break;
- case 38 :
- {
- cur_input.loc_field = cur_input.limit_field + 1;
- cur_cs = par_loc;
- cur_cmd = eqtb[cur_cs].hh.b0;
- cur_chr = eqtb[cur_cs].hh.v.RH;
- if(cur_cmd >= 113){
- check_outer_validity ();
- }
- }
- break;
- case 2 :
- incr(align_state);
- break;
- case 18 :
- case 34 :
- {
- cur_input.state_field = 1;
- incr(align_state);
- }
- break;
- case 3 :
- decr(align_state);
- break;
- case 19 :
- case 35 :
- {
- cur_input.state_field = 1;
- decr(align_state);
- }
- break;
- case 20 :
- case 21 :
- case 23 :
- case 25 :
- case 28 :
- case 29 :
- case 36 :
- case 37 :
- case 39 :
- case 41 :
- case 44 :
- case 45 :
- cur_input.state_field = 1;
- break;
- default:
- ;
- break;
- }
- }
- else {
- cur_input.state_field = 33;
- if(cur_input.name_field > 17) {
- incr(line);
- first = cur_input.start_field;
- if(! force_eof){
- if(input_ln(input_file[cur_input.index_field], true)) {
- firm_up_the_line ();
- }
- else force_eof = true;
- }
- if(force_eof){
- print_char(41); /*)*/
- decr(open_parens);
-#ifndef _WINDOWS
- fflush(stdout);
-#endif
- force_eof = false;
- end_file_reading ();
- check_outer_validity ();
- goto lab20;
- }
- if((eqtb[(hash_size + 3211)].cint < 0)||
- (eqtb[(hash_size + 3211)].cint > 255))
- decr(cur_input.limit_field);
-/* long to unsigned char ... */
- else buffer[cur_input.limit_field]= eqtb[(hash_size + 3211)].cint;
- first = cur_input.limit_field + 1;
- cur_input.loc_field = cur_input.start_field;
- }
- else {
- if(!(cur_input.name_field == 0)) {
- cur_cmd = 0;
- cur_chr = 0;
- return;
- }
- if(input_ptr > 0){
- end_file_reading ();
- goto lab20;
- }
- if(selector < 18) open_log_file ();
- if(interaction > 1){
- if((eqtb[(hash_size + 3211)].cint < 0)||
- (eqtb[(hash_size + 3211)].cint > 255)
- )
- incr(cur_input.limit_field);
- if(cur_input.limit_field == cur_input.start_field)
- print_nl(613); /* (Please type a command or say `\end') */
- print_ln ();
- first = cur_input.start_field;
- {
- ;
- print(42); /* * */
- term_input(42, 0);
- }
- cur_input.limit_field = last;
- if((eqtb[(hash_size + 3211)].cint < 0)||
- (eqtb[(hash_size + 3211)].cint > 255)
- )
- decr(cur_input.limit_field);
-/* long to unsigned char ... */
- else buffer[cur_input.limit_field]= eqtb[(hash_size + 3211)].cint;
- first = cur_input.limit_field + 1;
- cur_input.loc_field = cur_input.start_field;
- }
- else {
- fatal_error(614); /* *** (job aborted, no legal \end found) */
- return; // abort_flag set
- }
- }
- {
- if(interrupt != 0){
- pause_for_instructions ();
- }
- }
- goto lab25;
- }
- }
- else if(cur_input.loc_field != 0)
- {
- t = mem[cur_input.loc_field].hh.v.LH;
- cur_input.loc_field = mem[cur_input.loc_field].hh.v.RH;
- if(t >= 4095)
- {
- cur_cs = t - 4095;
- cur_cmd = eqtb[cur_cs].hh.b0;
- cur_chr = eqtb[cur_cs].hh.v.RH;
- if(cur_cmd >= 113)
- if(cur_cmd == 116)
- {
- cur_cs = mem[cur_input.loc_field].hh.v.LH - 4095;
- cur_input.loc_field = 0;
- cur_cmd = eqtb[cur_cs].hh.b0;
- cur_chr = eqtb[cur_cs].hh.v.RH;
- if(cur_cmd > 100)
- {
- cur_cmd = 0;
- cur_chr = 257;
- }
- }
- else {
- check_outer_validity ();
- }
- }
- else {
-
- cur_cmd = t / 256;
-/* cur_cmd = t >> 8; */ /* top 8 bits */
- cur_chr = t % 256;
-/* cur_chr = t & 255; */ /* last 8 bits */
- switch(cur_cmd)
- {case 1 :
- incr(align_state);
- break;
- case 2 :
- decr(align_state);
- break;
- case 5 :
- {
- begin_token_list(param_stack[cur_input.limit_field + cur_chr - 1],
- 0);
- goto lab20;
- }
- break;
- default:
- ;
- break;
- }
- }
- }
- else {
- end_token_list ();
- goto lab20;
- }
- if(cur_cmd <= 5)
- if(cur_cmd >= 4)
- if(align_state == 0)
- {
- if(scanner_status == 4){
- fatal_error(592); /* (interwoven alignment preambles are not allowed) */
- return; // abort_flag set
- }
-
- cur_cmd = mem[cur_align + 5].hh.v.LH;
- mem[cur_align + 5].hh.v.LH = cur_chr;
- if(cur_cmd == 63)
- begin_token_list(mem_top - 10, 2);
- else begin_token_list(mem[cur_align + 2].cint, 2);
- align_state = 1000000L;
- goto lab20;
- }
-}
-
-#pragma optimize ("", on) /* 96/Sep/12 */
-
-/*****************************************************************************/
+/* Copyright 2014 Clerk Ma\r
+\r
+ This program is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ This program is distributed in the hope that it will be useful, but\r
+ WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r
+ General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with this program; if not, write to the Free Software\r
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA\r
+ 02110-1301 USA. */\r
+\r
+#define EXTERN extern\r
+\r
+#include "yandytex.h"\r
+\r
+/* following bit used to be end of tex1.c */\r
+#ifdef STAT\r
+/* sec 0284 */\r
+void restore_trace (pointer p, const char * s)\r
+{\r
+ begin_diagnostic();\r
+ print_char('{');\r
+ prints(s);\r
+ print_char(' ');\r
+ show_eqtb(p);\r
+ print_char('}');\r
+ end_diagnostic(false);\r
+}\r
+#endif\r
+/* sec 0281 */\r
+void unsave (void)\r
+{\r
+ pointer p;\r
+ quarterword l;\r
+ halfword t;\r
+\r
+ if (cur_level > level_one)\r
+ {\r
+ decr(cur_level);\r
+\r
+ while (true)\r
+ {\r
+ decr(save_ptr);\r
+\r
+ if (save_type(save_ptr) == level_boundary)\r
+ goto done;\r
+\r
+ p = save_index(save_ptr);\r
+\r
+ if (save_type(save_ptr) == insert_token)\r
+ {\r
+ t = cur_tok;\r
+ cur_tok = p;\r
+ back_input();\r
+ cur_tok = t;\r
+ }\r
+ else\r
+ {\r
+ if (save_type(save_ptr) == restore_old_value)\r
+ {\r
+ l = save_level(save_ptr);\r
+ decr(save_ptr);\r
+ }\r
+ else\r
+ save_stack[save_ptr] = eqtb[undefined_control_sequence];\r
+ \r
+ if (p < int_base)\r
+ if (eq_level(p) == level_one)\r
+ {\r
+ eq_destroy(save_stack[save_ptr]);\r
+#ifdef STAT\r
+ if (tracing_restores > 0)\r
+ restore_trace(p, "retaining");\r
+#endif\r
+ }\r
+ else\r
+ {\r
+ eq_destroy(eqtb[p]);\r
+ eqtb[p] = save_stack[save_ptr];\r
+#ifdef STAT\r
+ if (tracing_restores > 0)\r
+ restore_trace(p, "restoring");\r
+#endif\r
+ }\r
+ else if (xeq_level[p] != level_one)\r
+ {\r
+ eqtb[p] = save_stack[save_ptr];\r
+ xeq_level[p] = l;\r
+#ifdef STAT\r
+ if (tracing_restores > 0)\r
+ restore_trace(p, "restoring");\r
+#endif\r
+ }\r
+ else\r
+ {\r
+#ifdef STAT\r
+ if (tracing_restores > 0)\r
+ restore_trace(p, "retaining");\r
+#endif\r
+ }\r
+ }\r
+ }\r
+\r
+done:\r
+ cur_group = save_level(save_ptr);\r
+ cur_boundary = save_index(save_ptr);\r
+ }\r
+ else\r
+ {\r
+ confusion("curlevel");\r
+ return;\r
+ }\r
+}\r
+/* sec 0288 */\r
+void prepare_mag (void) \r
+{\r
+ if ((mag_set > 0) && (mag != mag_set))\r
+ {\r
+ print_err("Incompatible magnification (");\r
+ print_int(mag);\r
+ prints(");");\r
+ print_nl(" the previous value will be retained");\r
+ help2("I can handle only one magnification ratio per job. So I've",\r
+ "reverted to the magnification you used earlier on this run.");\r
+ int_error(mag_set);\r
+ geq_word_define(int_base + mag_code, mag_set);\r
+ }\r
+\r
+ if ((mag <= 0) || (mag > 32768L))\r
+ {\r
+ print_err("Illegal magnification has been changed to 1000");\r
+ help1("The magnification ratio must be between 1 and 32768.");\r
+ int_error(mag);\r
+ geq_word_define(int_base + mag_code, 1000);\r
+ }\r
+\r
+ mag_set = mag;\r
+}\r
+/* sec 0295 */\r
+void token_show (pointer p)\r
+{\r
+ if (p != 0)\r
+ show_token_list(link(p), 0, 10000000L);\r
+}\r
+/* sec 0296 */\r
+void print_meaning (void) \r
+{\r
+ print_cmd_chr(cur_cmd, cur_chr);\r
+\r
+ if (cur_cmd >= call)\r
+ {\r
+ print_char(':');\r
+ print_ln();\r
+ token_show(cur_chr);\r
+ }\r
+ else if (cur_cmd == top_bot_mark)\r
+ {\r
+ print_char(':');\r
+ print_ln();\r
+ token_show(cur_mark[cur_chr]);\r
+ }\r
+}\r
+/* sec 0299 */\r
+void show_cur_cmd_chr (void)\r
+{ \r
+ begin_diagnostic();\r
+ print_nl("{");\r
+\r
+ if (mode != shown_mode)\r
+ {\r
+ print_mode(mode);\r
+ prints(": ");\r
+ shown_mode = mode;\r
+ }\r
+\r
+ print_cmd_chr(cur_cmd, cur_chr);\r
+ print_char('}');\r
+ end_diagnostic(false);\r
+}\r
+/* sec 0311 */\r
+void show_context (void)\r
+{\r
+ char old_setting;\r
+ integer nn;\r
+ boolean bottom_line;\r
+ integer i;\r
+ integer j;\r
+ integer l;\r
+ integer m;\r
+ integer n;\r
+ integer p;\r
+ integer q;\r
+\r
+ base_ptr = input_ptr;\r
+ input_stack[base_ptr] = cur_input;\r
+ nn = -1;\r
+ bottom_line = false;\r
+\r
+ while (true)\r
+ {\r
+ cur_input = input_stack[base_ptr];\r
+\r
+ if ((state != token_list))\r
+ if ((name > 17) || (base_ptr == 0))\r
+ bottom_line = true;\r
+\r
+ if ((base_ptr == input_ptr) || bottom_line || (nn < error_context_lines))\r
+ {\r
+ if ((base_ptr == input_ptr) || (state != token_list) ||\r
+ (index != backed_up) || (loc != 0))\r
+ {\r
+ tally = 0;\r
+ old_setting = selector;\r
+\r
+ if (state != token_list)\r
+ {\r
+ if (name <= 17)\r
+ if (name == 0)\r
+ if (base_ptr == 0)\r
+ print_nl("<*>");\r
+ else\r
+ print_nl("<insert> ");\r
+ else\r
+ {\r
+ print_nl("<read ");\r
+\r
+ if (name == 17)\r
+ print_char('*');\r
+ else\r
+ print_int(name - 1);\r
+\r
+ print_char('>');\r
+ }\r
+ else\r
+ {\r
+ if (c_style_flag)\r
+ {\r
+ print_ln();\r
+\r
+ if (name > 17)\r
+ print(name);\r
+\r
+ print_char('(');\r
+ print_int(line);\r
+ prints(") :");\r
+ }\r
+ else\r
+ {\r
+ print_nl("l.");\r
+ print_int(line);\r
+ }\r
+ }\r
+\r
+ print_char(' ');\r
+ begin_pseudoprint();\r
+\r
+ if (buffer[limit] == end_line_char)\r
+ j = limit;\r
+ else\r
+ j = limit + 1;\r
+\r
+ if (j > 0)\r
+ for (i = start; i <= j - 1; i++)\r
+ {\r
+ if (i == loc)\r
+ set_trick_count();\r
+\r
+ print(buffer[i]);\r
+ }\r
+ }\r
+ else\r
+ {\r
+ switch (index)\r
+ {\r
+ case parameter:\r
+ print_nl("<argument> ");\r
+ break;\r
+\r
+ case u_template:\r
+ case v_template:\r
+ print_nl("<template> ");\r
+ break;\r
+\r
+ case backed_up:\r
+ if (loc == 0)\r
+ print_nl("<recently read> ");\r
+ else\r
+ print_nl("<to be read again> ");\r
+ break;\r
+\r
+ case inserted:\r
+ print_nl("<inserted text> ");\r
+ break;\r
+\r
+ case macro:\r
+ print_ln();\r
+ print_cs(name);\r
+ break;\r
+\r
+ case output_text:\r
+ print_nl("<output> ");\r
+ break;\r
+\r
+ case every_par_text:\r
+ print_nl("<everypar> ");\r
+ break;\r
+\r
+ case every_math_text:\r
+ print_nl("<everymath> ");\r
+ break;\r
+\r
+ case every_display_text:\r
+ print_nl("<everydisplay> ");\r
+ break;\r
+\r
+ case every_hbox_text:\r
+ print_nl("<everyhbox> ");\r
+ break;\r
+\r
+ case every_vbox_text:\r
+ print_nl("<everyvbox> ");\r
+ break;\r
+\r
+ case every_job_text:\r
+ print_nl("<everyjob> ");\r
+ break;\r
+\r
+ case every_cr_text:\r
+ print_nl("<everycr> ");\r
+ break;\r
+\r
+ case mark_text:\r
+ print_nl("<mark> ");\r
+ break;\r
+\r
+ case write_text:\r
+ print_nl("<write> ");\r
+ break;\r
+\r
+ default:\r
+ print_nl("?");\r
+ break;\r
+ }\r
+\r
+ begin_pseudoprint();\r
+\r
+ if (index < macro)\r
+ show_token_list(start, loc, 100000L);\r
+ else\r
+ show_token_list(link(start), loc, 100000L);\r
+ }\r
+\r
+ selector = old_setting;\r
+\r
+ if (trick_count == 1000000L)\r
+ set_trick_count();\r
+ \r
+ if (tally < trick_count)\r
+ m = tally - first_count;\r
+ else\r
+ m = trick_count - first_count;\r
+\r
+ if (l + first_count <= half_error_line)\r
+ {\r
+ p = 0;\r
+ n = l + first_count;\r
+ }\r
+ else\r
+ {\r
+ prints("...");\r
+ p = l + first_count - half_error_line + 3;\r
+ n = half_error_line;\r
+ }\r
+\r
+ for (q = p; q <= first_count - 1; q++)\r
+ print_char(trick_buf[q % error_line]);\r
+\r
+ print_ln();\r
+\r
+ for (q = 1; q <= n; q++)\r
+ print_char(' ');\r
+\r
+ if (m + n <= error_line)\r
+ p = first_count + m;\r
+ else\r
+ p = first_count +(error_line - n - 3);\r
+\r
+ for (q = first_count; q <= p - 1; q++)\r
+ print_char(trick_buf[q % error_line]);\r
+\r
+ if (m + n > error_line)\r
+ prints("...");\r
+\r
+ incr(nn);\r
+ }\r
+ }\r
+ else if (nn == error_context_lines)\r
+ {\r
+ print_nl("...");\r
+ incr(nn); \r
+ }\r
+\r
+ if (bottom_line)\r
+ goto done;\r
+\r
+ decr(base_ptr);\r
+ }\r
+\r
+done:\r
+ cur_input = input_stack[input_ptr];\r
+}\r
+/* sec 0323 */\r
+void begin_token_list_ (pointer p, quarterword t)\r
+{\r
+ push_input();\r
+ state = token_list;\r
+ start = p;\r
+ index = t;\r
+\r
+ if (t >= macro)\r
+ {\r
+ add_token_ref(p);\r
+\r
+ if (t == macro)\r
+ limit = param_ptr;\r
+ else\r
+ {\r
+ loc = link(p);\r
+\r
+ if (tracing_macros > 1)\r
+ {\r
+ begin_diagnostic(); \r
+ print_nl("");\r
+\r
+ switch (t)\r
+ {\r
+ case mark_text:\r
+ print_esc("mark");\r
+ break;\r
+\r
+ case write_text:\r
+ print_esc("write");\r
+ break;\r
+\r
+ default:\r
+ print_cmd_chr(assign_toks, t - output_text + output_routine_loc);\r
+ break;\r
+ }\r
+\r
+ prints("->");\r
+ token_show(p);\r
+ end_diagnostic(false);\r
+ }\r
+ }\r
+ }\r
+ else\r
+ loc = p;\r
+}\r
+/* sec 0324 */\r
+void end_token_list (void) \r
+{ \r
+ if (index >= backed_up)\r
+ {\r
+ if (index <= inserted)\r
+ flush_list(start); \r
+ else\r
+ {\r
+ delete_token_ref(start);\r
+\r
+ if (index == macro)\r
+ while (param_ptr > limit)\r
+ {\r
+ decr(param_ptr);\r
+ flush_list(param_stack[param_ptr]);\r
+ }\r
+ }\r
+ }\r
+ else if (index == u_template)\r
+ if (align_state > 500000L)\r
+ align_state = 0;\r
+ else\r
+ {\r
+ fatal_error("(interwoven alignment preambles are not allowed)");\r
+ return;\r
+ }\r
+\r
+ pop_input();\r
+ check_interrupt();\r
+}\r
+/* sec 0325 */\r
+void back_input (void)\r
+{\r
+ pointer p;\r
+\r
+ while ((state == 0) && (loc == 0) &&\r
+ (index != v_template))\r
+ {\r
+ end_token_list();\r
+ }\r
+\r
+ p = get_avail();\r
+ info(p) = cur_tok;\r
+\r
+ if (cur_tok < right_brace_limit)\r
+ if (cur_tok < left_brace_limit)\r
+ decr(align_state);\r
+ else\r
+ incr(align_state);\r
+\r
+ push_input();\r
+ state = token_list;\r
+ start = p;\r
+ index = backed_up;\r
+ loc = p;\r
+}\r
+/* sec 0327 */\r
+void back_error (void)\r
+{\r
+ OK_to_interrupt = false;\r
+ back_input();\r
+ OK_to_interrupt = true;\r
+ error();\r
+}\r
+/* sec 0327 */\r
+void ins_error (void) \r
+{\r
+ OK_to_interrupt = false;\r
+ back_input();\r
+ index = inserted;\r
+ OK_to_interrupt = true;\r
+ error();\r
+}\r
+/* sec 0328 */\r
+void begin_file_reading (void)\r
+{\r
+ if (in_open == max_in_open)\r
+ {\r
+ overflow("text input levels", max_in_open);\r
+ return;\r
+ }\r
+\r
+#ifdef ALLOCATEBUFFER\r
+ if (first == current_buf_size)\r
+ buffer = realloc_buffer(increment_buf_size);\r
+\r
+ if (first == current_buf_size)\r
+ {\r
+ overflow("buffer size", current_buf_size);\r
+ return;\r
+ }\r
+#else\r
+ if (first == buf_size)\r
+ {\r
+ overflow("buffer size", buf_size);\r
+ return;\r
+ }\r
+#endif\r
+\r
+ incr(in_open);\r
+\r
+ if (in_open > high_in_open) /* 1999 Jan 17 */\r
+ high_in_open = in_open;\r
+\r
+ push_input();\r
+ index = in_open;\r
+ line_stack[index] = line;\r
+ start = first;\r
+ state = mid_line;\r
+ name = 0;\r
+}\r
+/* sec 0329 */\r
+void end_file_reading (void)\r
+{\r
+ first = start;\r
+ line = line_stack[index];\r
+\r
+ if (name > 17)\r
+ a_close(cur_file);\r
+\r
+ pop_input();\r
+ decr(in_open);\r
+}\r
+/* called only form tex0.c */\r
+/* sec 0330 */\r
+void clear_for_error_prompt (void) \r
+{\r
+ while ((state != 0) && (name == 0) &&\r
+ (input_ptr > 0) && (loc > limit))\r
+ end_file_reading();\r
+\r
+ print_ln();\r
+}\r
+/* sec 0336 */\r
+void check_outer_validity (void)\r
+{\r
+ pointer p;\r
+ pointer q;\r
+\r
+ if (scanner_status != 0)\r
+ {\r
+ deletions_allowed = false;\r
+\r
+ if (cur_cs != 0)\r
+ {\r
+ if ((state == 0) || (name < 1) || (name > 17))\r
+ {\r
+ p = get_avail();\r
+ info(p) = cs_token_flag + cur_cs;\r
+ back_list(p);\r
+ }\r
+\r
+ cur_cmd = spacer;\r
+ cur_chr = ' ';\r
+ }\r
+\r
+ if (scanner_status > skipping)\r
+ {\r
+ runaway();\r
+\r
+ if (cur_cs == 0)\r
+ print_err("File ended");\r
+ else\r
+ {\r
+ cur_cs = 0;\r
+ print_err("Forbidden control sequence found");\r
+ }\r
+\r
+ prints(" while scanning ");\r
+ p = get_avail();\r
+\r
+ switch (scanner_status)\r
+ {\r
+ case defining:\r
+ prints("definition");\r
+ info(p) = right_brace_token + '}';\r
+ break;\r
+\r
+ case matching:\r
+ prints("use");\r
+ info(p) = par_token;\r
+ long_state = outer_call;\r
+ break;\r
+\r
+ case aligning:\r
+ prints("preamble");\r
+ info(p) = right_brace_token + '}';\r
+ q = p;\r
+ p = get_avail();\r
+ link(p) = q;\r
+ info(p) = cs_token_flag + frozen_cr;\r
+ align_state = -1000000L;\r
+ break;\r
+\r
+ case absorbing:\r
+ prints("text");\r
+ info(p) = right_brace_token + '}';\r
+ break;\r
+ }\r
+\r
+ ins_list(p);\r
+ prints(" of ");\r
+ sprint_cs(warning_index);\r
+ help4("I suspect you have forgotten a `}', causing me",\r
+ "to read past where you wanted me to stop.",\r
+ "I'll try to recover; but if the error is serious,",\r
+ "you'd better type `E' or `X' now and fix your file.");\r
+ error();\r
+ }\r
+ else\r
+ {\r
+ print_err("Incomplete ");\r
+ print_cmd_chr(if_test, cur_if);\r
+ prints("; all text was ignored after line ");\r
+ print_int(skip_line);\r
+ help3("A forbidden control sequence occurred in skipped text.",\r
+ "This kind of error happens when you say `\\if...' and forget",\r
+ "the matching `\\fi'. I've inserted a `\\fi'; this might work.");\r
+\r
+ if (cur_cs != 0)\r
+ cur_cs = 0; \r
+ else\r
+ help_line[2] = "The file ended while I was skipping conditional text.";\r
+\r
+ cur_tok = cs_token_flag + frozen_fi;\r
+ ins_error();\r
+ }\r
+\r
+ deletions_allowed = true;\r
+ }\r
+}\r
+/* sec 0363 */\r
+void firm_up_the_line (void)\r
+{\r
+ integer k;\r
+\r
+ limit = last;\r
+\r
+ if (pausing > 0)\r
+ if (interaction > nonstop_mode)\r
+ {\r
+ ;\r
+ print_ln();\r
+\r
+ if (start < limit)\r
+ for (k = start; k <= limit - 1; k++)\r
+ print(buffer[k]);\r
+\r
+ first = limit;\r
+ prompt_input("=>");\r
+\r
+ if (last > first)\r
+ {\r
+ for (k = first; k <= last - 1; k++)\r
+ buffer[k + start - first] = buffer[k];\r
+\r
+ limit = start + last - first;\r
+ }\r
+ }\r
+}\r
+/* sec 0365 */\r
+void get_token (void)\r
+{ \r
+ no_new_control_sequence = false;\r
+ get_next();\r
+ no_new_control_sequence = true;\r
+\r
+ if (cur_cs == 0)\r
+ cur_tok = (cur_cmd * 256) + cur_chr;\r
+ else\r
+ cur_tok = cs_token_flag + cur_cs;\r
+}\r
+/* sec 0389 */\r
+void macro_call (void)\r
+{\r
+ pointer r;\r
+ pointer p;\r
+ pointer q;\r
+ pointer s;\r
+ pointer t;\r
+ pointer u, v;\r
+ pointer rbrace_ptr;\r
+ small_number n;\r
+ halfword unbalance;\r
+ halfword m;\r
+ pointer ref_count;\r
+ small_number save_scanner_status;\r
+ pointer save_warning_index;\r
+ ASCII_code match_chr;\r
+\r
+ save_scanner_status = scanner_status;\r
+ save_warning_index = warning_index;\r
+ warning_index = cur_cs;\r
+ ref_count = cur_chr;\r
+ r = link(ref_count);\r
+ n = 0;\r
+\r
+ if (tracing_macros > 0)\r
+ {\r
+ begin_diagnostic();\r
+ print_ln();\r
+ print_cs(warning_index);\r
+ token_show(ref_count);\r
+ end_diagnostic(false);\r
+ }\r
+\r
+ if (info(r) != end_match_token)\r
+ {\r
+ scanner_status = matching;\r
+ unbalance = 0;\r
+ long_state = eq_type(cur_cs);\r
+\r
+ if (long_state >= outer_call)\r
+ long_state = long_state - 2;\r
+\r
+ do\r
+ {\r
+ link(temp_head) = 0;\r
+\r
+ if ((info(r) > match_token + 255) || (info(r) < match_token))\r
+ s = 0;\r
+ else\r
+ {\r
+ match_chr = info(r) - match_token;\r
+ s = link(r);\r
+ r = s;\r
+ p = temp_head;\r
+ m = 0;\r
+ }\r
+\r
+continu:\r
+ get_token();\r
+\r
+ if (cur_tok == info(r))\r
+ {\r
+ r = link(r);\r
+\r
+ if ((info(r) >= match_token) && (info(r) <= end_match_token))\r
+ {\r
+ if (cur_tok < left_brace_limit)\r
+ decr(align_state);\r
+\r
+ goto found;\r
+ }\r
+ else\r
+ goto continu;\r
+ }\r
+\r
+ if (s != r)\r
+ if (s == 0)\r
+ {\r
+ print_err("Use of ");\r
+ sprint_cs(warning_index);\r
+ prints(" doesn't match its definition");\r
+ help4("If you say, e.g., `\\def\\a1{...}', then you must always",\r
+ "put `1' after `\\a', since control sequence names are",\r
+ "made up of letters only. The macro here has not been",\r
+ "followed by the required stuff, so I'm ignoring it.");\r
+ error();\r
+ goto exit;\r
+ }\r
+ else\r
+ {\r
+ t = s;\r
+\r
+ do\r
+ {\r
+ store_new_token(info(t));\r
+ incr(m);\r
+ u = link(t);\r
+ v = s;\r
+\r
+ while (true)\r
+ {\r
+ if (u == r)\r
+ if (cur_tok != info(v))\r
+ goto done;\r
+ else\r
+ {\r
+ r = link(v);\r
+ goto continu;\r
+ }\r
+\r
+ if (info(u) != info(v))\r
+ goto done;\r
+\r
+ u = link(u);\r
+ v = link(v);\r
+ }\r
+done:\r
+ t = link(t);\r
+ }\r
+ while (!(t == r));\r
+\r
+ r = s;\r
+ }\r
+\r
+ if (cur_tok == par_token)\r
+ if (long_state != long_call)\r
+ {\r
+ if (long_state == call)\r
+ {\r
+ runaway();\r
+ print_err("Paragraph ended before ");\r
+ sprint_cs(warning_index);\r
+ prints("was complete");\r
+ help3("I suspect you've forgotten a `}', causing me to apply this",\r
+ "control sequence to too much text. How can we recover?",\r
+ "My plan is to forget the whole thing and hope for the best.");\r
+ back_error();\r
+ }\r
+\r
+ pstack[n] = link(temp_head);\r
+ align_state = align_state - unbalance;\r
+\r
+ for (m = 0; m <= n; m++)\r
+ flush_list(pstack[m]);\r
+\r
+ goto exit;\r
+ }\r
+\r
+ if (cur_tok < right_brace_limit)\r
+ if (cur_tok < left_brace_limit)\r
+ {\r
+ unbalance = 1;\r
+\r
+ while (true)\r
+ {\r
+ fast_store_new_token(cur_tok);\r
+ get_token();\r
+\r
+ if (cur_tok == par_token)\r
+ if (long_state != long_call)\r
+ {\r
+ if (long_state == call)\r
+ {\r
+ runaway();\r
+ print_err("Paragraph ended before ");\r
+ sprint_cs(warning_index);\r
+ prints(" was complete");\r
+ help3("I suspect you've forgotten a `}', causing me to apply this",\r
+ "control sequence to too much text. How can we recover?",\r
+ "My plan is to forget the whole thing and hope for the best.");\r
+ back_error();\r
+ }\r
+\r
+ pstack[n] = link(temp_head);\r
+ align_state = align_state - unbalance;\r
+\r
+ for (m = 0; m <= n; m++)\r
+ flush_list(pstack[m]);\r
+ goto exit;\r
+ }\r
+\r
+ if (cur_tok < right_brace_limit)\r
+ if (cur_tok < left_brace_limit)\r
+ incr(unbalance);\r
+ else\r
+ {\r
+ decr(unbalance);\r
+\r
+ if (unbalance == 0)\r
+ goto done1;\r
+ }\r
+ }\r
+done1:\r
+ rbrace_ptr = p;\r
+ store_new_token(cur_tok);\r
+ }\r
+ else\r
+ {\r
+ back_input();\r
+ print_err("Argument of ");\r
+ sprint_cs(warning_index);\r
+ prints(" has an extra }");\r
+ help6("I've run across a `}' that doesn't seem to match anything.",\r
+ "For example, `\\def\\a#1{...}' and `\\a}' would produce",\r
+ "this error. If you simply proceed now, the `\\par' that",\r
+ "I've just inserted will cause me to report a runaway",\r
+ "argument that might be the root of the problem. But if",\r
+ "your `}' was spurious, just type `2' and it will go away.");\r
+ incr(align_state);\r
+ long_state = call;\r
+ cur_tok = par_token;\r
+ ins_error();\r
+ goto continu;\r
+ }\r
+ else\r
+ {\r
+ if (cur_tok == space_token)\r
+ if (info(r) <= end_match_token)\r
+ if (info(r) >= match_token)\r
+ goto continu;\r
+\r
+ store_new_token(cur_tok);\r
+ }\r
+\r
+ incr(m);\r
+\r
+ if (info(r) > end_match_token)\r
+ goto continu;\r
+\r
+ if (info(r) < match_token)\r
+ goto continu;\r
+\r
+found:\r
+ if (s != 0)\r
+ {\r
+ if ((m == 1) && (info(p) < right_brace_limit) && (p != temp_head))\r
+ {\r
+ link(rbrace_ptr) = 0;\r
+ free_avail(p);\r
+ p = link(temp_head);\r
+ pstack[n] = link(p);\r
+ free_avail(p);\r
+ }\r
+ else\r
+ pstack[n] = link(temp_head);\r
+\r
+ incr(n);\r
+\r
+ if (tracing_macros > 0)\r
+ {\r
+ begin_diagnostic();\r
+ //print_nl(match_chr);\r
+ print_nl(""); print(match_chr);\r
+ print_int(n);\r
+ prints("<-");\r
+ show_token_list(pstack[n - 1], 0, 1000);\r
+ end_diagnostic(false);\r
+ }\r
+ }\r
+ }\r
+ while (!(info(r) == end_match_token));\r
+ }\r
+\r
+ while ((state == token_list) && (loc == 0) &&\r
+ (index != v_template))\r
+ end_token_list();\r
+\r
+ begin_token_list(ref_count, macro);\r
+ name = warning_index;\r
+ loc = link(r);\r
+\r
+ if (n > 0)\r
+ {\r
+ if (param_ptr + n > max_param_stack)\r
+ {\r
+ max_param_stack = param_ptr + n;\r
+\r
+#ifdef ALLOCATEPARAMSTACK\r
+ if (max_param_stack > current_param_size)\r
+ param_stack = realloc_param_stack(increment_param_size);\r
+\r
+ if (max_param_stack > current_param_size)\r
+ {\r
+ overflow("parameter stack size", current_param_size);\r
+ return;\r
+ }\r
+#else\r
+ if (max_param_stack > param_size)\r
+ {\r
+ overflow("parameter stack size", param_size);\r
+ return;\r
+ }\r
+#endif\r
+ }\r
+\r
+ for (m = 0; m <= n - 1; m++)\r
+ param_stack[param_ptr + m] = pstack[m];\r
+\r
+ param_ptr = param_ptr + n;\r
+ }\r
+\r
+exit:\r
+ scanner_status = save_scanner_status;\r
+ warning_index = save_warning_index;\r
+}\r
+/* sec 0379 */\r
+void insert_relax (void)\r
+{\r
+ cur_tok = cs_token_flag + cur_cs;\r
+ back_input();\r
+ cur_tok = cs_token_flag + frozen_relax;\r
+ back_input();\r
+ index = inserted;\r
+}\r
+/* sec 0366 */\r
+void expand (void)\r
+{\r
+ halfword t;\r
+ pointer p, q, r;\r
+ integer j;\r
+ integer cv_backup;\r
+ small_number cvl_backup, radix_backup, co_backup;\r
+ pointer backup_backup;\r
+ small_number save_scanner_status;\r
+\r
+ cv_backup = cur_val;\r
+ cvl_backup = cur_val_level;\r
+ radix_backup = radix;\r
+ co_backup = cur_order;\r
+ backup_backup = link(backup_head);\r
+\r
+ if (cur_cmd < call)\r
+ {\r
+ if (tracing_commands > 1)\r
+ show_cur_cmd_chr();\r
+\r
+ switch (cur_cmd)\r
+ {\r
+ case top_bot_mark:\r
+ if (cur_mark[cur_chr] != 0)\r
+ begin_token_list(cur_mark[cur_chr], mark_text);\r
+ break;\r
+\r
+ case expand_after:\r
+ get_token();\r
+ t = cur_tok;\r
+ get_token();\r
+\r
+ if (cur_cmd > max_command)\r
+ expand();\r
+ else\r
+ back_input();\r
+\r
+ cur_tok = t;\r
+ back_input();\r
+ break;\r
+\r
+ case no_expand:\r
+ save_scanner_status = scanner_status;\r
+ scanner_status = normal;\r
+ get_token();\r
+ scanner_status = save_scanner_status;\r
+ t = cur_tok;\r
+ back_input();\r
+\r
+ if (t >= cs_token_flag)\r
+ {\r
+ p = get_avail();\r
+ info(p) = cs_token_flag + frozen_dont_expand;\r
+ link(p) = loc;\r
+ start = p;\r
+ loc = p;\r
+ }\r
+ break;\r
+\r
+ case cs_name:\r
+ r = get_avail();\r
+ p = r;\r
+\r
+ do\r
+ {\r
+ get_x_token();\r
+ \r
+ if (cur_cs == 0)\r
+ store_new_token(cur_tok);\r
+ }\r
+ while (!(cur_cs != 0));\r
+\r
+ if (cur_cmd != end_cs_name)\r
+ {\r
+ print_err("Missing ");\r
+ print_esc("endcsname");\r
+ prints(" inserted");\r
+ help2("The control sequence marked <to be read again> should",\r
+ "not appear between \\csname and \\endcsname.");\r
+ back_error();\r
+ }\r
+\r
+ j = first;\r
+ p = link(r);\r
+\r
+ while (p != 0)\r
+ {\r
+ if (j >= max_buf_stack)\r
+ {\r
+ max_buf_stack = j + 1;\r
+\r
+#ifdef ALLOCATEBUFFER\r
+ if (max_buf_stack == current_buf_size)\r
+ buffer = realloc_buffer (increment_buf_size);\r
+\r
+ if (max_buf_stack == current_buf_size)\r
+ {\r
+ overflow("buffer size", current_buf_size);\r
+ return;\r
+ }\r
+#else\r
+ if (max_buf_stack == buf_size)\r
+ {\r
+ overflow("buffer size", buf_size);\r
+ return;\r
+ }\r
+#endif\r
+ }\r
+\r
+ buffer[j] = info(p) % 256;\r
+ incr(j);\r
+ p = link(p);\r
+ }\r
+\r
+ if (j > first + 1)\r
+ {\r
+ no_new_control_sequence = false;\r
+ cur_cs = id_lookup(first, j - first);\r
+ no_new_control_sequence = true;\r
+ }\r
+ else if (j == first)\r
+ cur_cs = null_cs;\r
+ else\r
+ cur_cs = single_base + buffer[first];\r
+\r
+ flush_list(r);\r
+\r
+ if (eq_type(cur_cs) == undefined_cs)\r
+ {\r
+ eq_define(cur_cs, relax, 256);\r
+ }\r
+\r
+ cur_tok = cur_cs + cs_token_flag;\r
+ back_input();\r
+ break;\r
+\r
+ case convert:\r
+ conv_toks();\r
+ break;\r
+\r
+ case the:\r
+ ins_the_toks();\r
+ break;\r
+\r
+ case if_test:\r
+ conditional();\r
+ break;\r
+\r
+ case fi_or_else:\r
+ if (cur_chr > if_limit)\r
+ if (if_limit == 1)\r
+ insert_relax();\r
+ else\r
+ {\r
+ print_err("Extra ");\r
+ print_cmd_chr(fi_or_else, cur_chr);\r
+ help1("I'm ignoring this; it doesn't match any \\if.");\r
+ error();\r
+ }\r
+ else\r
+ {\r
+ while (cur_chr != fi_code)\r
+ pass_text();\r
+\r
+ {\r
+ p = cond_ptr;\r
+ if_line = if_line_field(p);\r
+ cur_if = subtype(p);\r
+ if_limit = type(p);\r
+ cond_ptr = link(p);\r
+ free_node(p, if_node_size);\r
+ }\r
+ }\r
+ break;\r
+\r
+ case input:\r
+ if (cur_chr > 0)\r
+ force_eof = true;\r
+ else if (name_in_progress)\r
+ insert_relax();\r
+ else\r
+ start_input();\r
+ break;\r
+\r
+ default:\r
+ print_err("Undefined control sequence");\r
+ help5("The control sequence at the end of the top line",\r
+ "of your error message was never \\def'ed. If you have",\r
+ "misspelled it (e.g., `\\hobx'), type `I' and the correct",\r
+ "spelling (e.g., `I\\hbox'). Otherwise just continue,",\r
+ "and I'll forget about whatever was undefined.");\r
+ error();\r
+ break;\r
+ }\r
+ }\r
+ else if (cur_cmd < end_template)\r
+ {\r
+ macro_call();\r
+ }\r
+ else\r
+ {\r
+ cur_tok = cs_token_flag + frozen_endv;\r
+ back_input();\r
+ }\r
+\r
+ cur_val = cv_backup;\r
+ cur_val_level = cvl_backup;\r
+ radix = radix_backup;\r
+ cur_order = co_backup;\r
+ link(backup_head) = backup_backup;\r
+}\r
+/* sec 0380 */\r
+void get_x_token (void)\r
+{\r
+restart:\r
+ get_next();\r
+\r
+ if (cur_cmd <= max_command)\r
+ goto done;\r
+\r
+ if (cur_cmd >= call)\r
+ if (cur_cmd < end_template)\r
+ macro_call();\r
+ else\r
+ {\r
+ cur_cs = frozen_endv;\r
+ cur_cmd = endv;\r
+ goto done;\r
+ }\r
+ else\r
+ expand();\r
+\r
+ goto restart;\r
+\r
+done:\r
+ if (cur_cs == 0)\r
+ cur_tok = (cur_cmd * 256) + cur_chr;\r
+ else\r
+ cur_tok = cs_token_flag + cur_cs;\r
+}\r
+/* sec 0381 */\r
+void x_token (void)\r
+{\r
+ while (cur_cmd > max_command)\r
+ {\r
+ expand();\r
+ get_next();\r
+ }\r
+\r
+ if (cur_cs == 0)\r
+ cur_tok = (cur_cmd * 256) + cur_chr;\r
+ else\r
+ cur_tok = cs_token_flag + cur_cs;\r
+}\r
+/* sec 0403 */\r
+void scan_left_brace (void)\r
+{\r
+ do\r
+ {\r
+ get_x_token();\r
+ }\r
+ while (!((cur_cmd != spacer) && (cur_cmd != relax)));\r
+\r
+ if (cur_cmd != left_brace)\r
+ {\r
+ print_err("Missing { inserted");\r
+ help4("A left brace was mandatory here, so I've put one in.",\r
+ "You might want to delete and/or insert some corrections",\r
+ "so that I will find a matching right brace soon.",\r
+ "(If you're confused by all this, try typing `I}' now.)");\r
+ back_error();\r
+ cur_tok = left_brace_token + '{';\r
+ cur_cmd = left_brace;\r
+ cur_chr = '{';\r
+ incr(align_state);\r
+ }\r
+}\r
+/* sec 0405 */\r
+void scan_optional_equals (void)\r
+{\r
+ do\r
+ {\r
+ get_x_token();\r
+ }\r
+ while (!(cur_cmd != spacer));\r
+\r
+ if (cur_tok != other_token + '=')\r
+ back_input();\r
+}\r
+/* sec 0407 */\r
+boolean scan_keyword (const char * s)\r
+{\r
+ pointer p;\r
+ pointer q;\r
+ const char * k;\r
+\r
+ p = backup_head;\r
+ link(p) = 0;\r
+ k = s;\r
+\r
+ while (*k)\r
+ {\r
+ get_x_token(); \r
+\r
+ if ((cur_cs == 0) && ((cur_chr == (*k)) || (cur_chr == (*k) - 'a' + 'A')))\r
+ {\r
+ store_new_token(cur_tok);\r
+ incr(k);\r
+ }\r
+ else if ((cur_cmd != spacer) || (p != backup_head))\r
+ {\r
+ back_input();\r
+\r
+ if (p != backup_head)\r
+ back_list(link(backup_head));\r
+\r
+ return false;\r
+ }\r
+ }\r
+\r
+ flush_list(link(backup_head));\r
+\r
+ return true;\r
+}\r
+/* sec 0408 */\r
+void mu_error (void)\r
+{\r
+ print_err("Incompatible glue units");\r
+ help1("I'm going to assume that 1mu=1pt when they're mixed.");\r
+ error();\r
+}\r
+/* sec 0433 */\r
+void scan_eight_bit_int (void)\r
+{\r
+ scan_int();\r
+\r
+ if ((cur_val < 0) || (cur_val > 255))\r
+ {\r
+ print_err("Bad register code");\r
+ help2("A register number must be between 0 and 255.",\r
+ "I changed this one to zero.");\r
+ int_error(cur_val);\r
+ cur_val = 0;\r
+ }\r
+}\r
+/* sec 0434 */\r
+void scan_char_num (void)\r
+{\r
+ scan_int();\r
+\r
+ if ((cur_val < 0) || (cur_val > 255))\r
+ {\r
+ print_err("Bad character code");\r
+ help2("A character number must be between 0 and 255.",\r
+ "I changed this one to zero.");\r
+ int_error(cur_val);\r
+ cur_val = 0;\r
+ }\r
+}\r
+/* sec 0435 */\r
+void scan_four_bit_int (void)\r
+{\r
+ scan_int();\r
+\r
+ if ((cur_val < 0) || (cur_val > 15))\r
+ {\r
+ print_err("Bad number");\r
+ help2("Since I expected to read a number between 0 and 15,",\r
+ "I changed this one to zero.");\r
+ int_error(cur_val);\r
+ cur_val = 0;\r
+ }\r
+}\r
+/* sec 0436 */\r
+void scan_fifteen_bit_int (void) \r
+{\r
+ scan_int();\r
+\r
+ if ((cur_val < 0) || (cur_val > 32767))\r
+ {\r
+ print_err("Bad mathchar");\r
+ help2("A mathchar number must be between 0 and 32767.",\r
+ "I changed this one to zero.");\r
+ int_error(cur_val);\r
+ cur_val = 0;\r
+ }\r
+}\r
+/* sec 0437 */\r
+void scan_twenty_seven_bit_int (void)\r
+{\r
+ scan_int();\r
+\r
+ if ((cur_val < 0) || (cur_val > 134217727L))\r
+ {\r
+ print_err("Bad delimiter code");\r
+ help2("A numeric delimiter code must be between 0 and 2^{27}-1.",\r
+ "I changed this one to zero.");\r
+ int_error(cur_val);\r
+ cur_val = 0;\r
+ }\r
+}\r
+/* sec 0577 */\r
+void scan_font_ident (void) \r
+{\r
+ internal_font_number f;\r
+ halfword m;\r
+\r
+ do\r
+ {\r
+ get_x_token();\r
+ }\r
+ while (!(cur_cmd != spacer));\r
+\r
+ if (cur_cmd == def_font)\r
+ f = cur_font;\r
+ else if (cur_cmd == set_font)\r
+ f = cur_chr; \r
+ else if (cur_cmd == def_family)\r
+ {\r
+ m = cur_chr;\r
+ scan_four_bit_int();\r
+ f = equiv(m + cur_val);\r
+ }\r
+ else\r
+ {\r
+ print_err("Missing font identifier");\r
+ help2("I was looking for a control sequence whose",\r
+ "current meaning has been defined by \\font.");\r
+ back_error();\r
+ f = null_font;\r
+ }\r
+\r
+ cur_val = f;\r
+}\r
+/* sec 0578 */\r
+void find_font_dimen (boolean writing)\r
+{\r
+ internal_font_number f;\r
+ integer n;\r
+\r
+ scan_int();\r
+ n = cur_val;\r
+ scan_font_ident();\r
+ f = cur_val;\r
+\r
+ if (n < 0)\r
+ cur_val = fmem_ptr;\r
+ else\r
+ {\r
+ if (writing && (n <= space_shrink_code) && (n >= space_code) && (font_glue[f] != 0)) \r
+ {\r
+ delete_glue_ref(font_glue[f]);\r
+ font_glue[f] = 0;\r
+ }\r
+\r
+ if (n > font_params[f])\r
+ if (f < font_ptr)\r
+ cur_val = fmem_ptr;\r
+ else\r
+ {\r
+ do\r
+ {\r
+ #ifdef ALLOCATEFONT\r
+ if (fmem_ptr == current_font_mem_size)\r
+ font_info = realloc_font_info(increment_font_mem_size);\r
+\r
+ if (fmem_ptr == current_font_mem_size)\r
+ {\r
+ overflow("font memory", current_font_mem_size);\r
+ return;\r
+ }\r
+#else\r
+ if (fmem_ptr == font_mem_size)\r
+ {\r
+ overflow("font memory", font_mem_size);\r
+ return;\r
+ }\r
+#endif\r
+ font_info[fmem_ptr].cint = 0;\r
+ incr(fmem_ptr);\r
+ incr(font_params[f]);\r
+ }\r
+ while (!(n == font_params[f]));\r
+\r
+ cur_val = fmem_ptr - 1;\r
+ }\r
+ else if (n > 0)\r
+ cur_val = n + param_base[f];\r
+ }\r
+\r
+ if (cur_val == fmem_ptr)\r
+ {\r
+ print_err("Font ");\r
+ print_esc(""); print(font_id_text(f));\r
+ prints(" has only ");\r
+ print_int(font_params[f]);\r
+ prints(" fontdimen parameters");\r
+ help2("To increase the number of font parameters, you must",\r
+ "use \\fontdimen immediately after the \\font is loaded.");\r
+ error();\r
+ }\r
+}\r
+/* sec 0413 */\r
+void scan_something_internal (small_number level, boolean negative)\r
+{\r
+ halfword m;\r
+ integer p;\r
+\r
+ m = cur_chr;\r
+\r
+ switch (cur_cmd)\r
+ {\r
+ case def_code:\r
+ {\r
+ scan_char_num();\r
+\r
+ if (m == math_code_base)\r
+ scanned_result(math_code(cur_val), int_val);\r
+ else if (m < math_code_base)\r
+ scanned_result(equiv(m + cur_val), int_val);\r
+ else\r
+ scanned_result(eqtb[m + cur_val].cint, int_val);\r
+ }\r
+ break;\r
+\r
+ case toks_register:\r
+ case assign_toks:\r
+ case def_family:\r
+ case set_font:\r
+ case def_font:\r
+ if (level != tok_val)\r
+ {\r
+ print_err("Missing number, treated as zero");\r
+ help3("A number should have been here; I inserted `0'.",\r
+ "(If you can't figure out why I needed to see a number,",\r
+ "look up `weird error' in the index to The TeXbook.)");\r
+ back_error();\r
+ scanned_result(0, dimen_val);\r
+ }\r
+ else if (cur_cmd <= assign_toks)\r
+ {\r
+ if (cur_cmd < assign_toks)\r
+ {\r
+ scan_eight_bit_int();\r
+ m = toks_base + cur_val;\r
+ }\r
+\r
+ scanned_result(equiv(m), tok_val);\r
+ }\r
+ else\r
+ {\r
+ back_input();\r
+ scan_font_ident();\r
+ scanned_result(font_id_base + cur_val, ident_val);\r
+ }\r
+ break;\r
+\r
+ case assign_int:\r
+ scanned_result(eqtb[m].cint, int_val);\r
+ break;\r
+\r
+ case assign_dimen:\r
+ scanned_result(eqtb[m].cint, dimen_val);\r
+ break; \r
+\r
+ case assign_glue:\r
+ scanned_result(equiv(m), glue_val);\r
+ break;\r
+\r
+ case assign_mu_glue:\r
+ scanned_result(equiv(m), mu_val);\r
+ break;\r
+\r
+ case set_aux:\r
+ if (abs(mode) != m)\r
+ {\r
+ print_err("Improper ");\r
+ print_cmd_chr(set_aux, m);\r
+ help4("You can refer to \\spacefactor only in horizontal mode;",\r
+ "you can refer to \\prevdepth only in vertical mode; and",\r
+ "neither of these is meaningful inside \\write. So",\r
+ "I'm forgetting what you said and using zero instead.");\r
+ error();\r
+\r
+ if (level != tok_val)\r
+ scanned_result(0, dimen_val);\r
+ else\r
+ scanned_result(0, int_val);\r
+ }\r
+ else if (m == vmode)\r
+ scanned_result(prev_depth, dimen_val);\r
+ else\r
+ scanned_result(space_factor, int_val);\r
+ break;\r
+\r
+ case set_prev_graf:\r
+ if (mode == 0)\r
+ scanned_result(0, int_val);\r
+ else\r
+ {\r
+ nest[nest_ptr] = cur_list;\r
+ p = nest_ptr;\r
+\r
+ while (abs(nest[p].mode_field) != vmode)\r
+ decr(p);\r
+\r
+ scanned_result(nest[p].pg_field, int_val);\r
+ }\r
+ break;\r
+\r
+ case set_page_int:\r
+ {\r
+ if (m == 0)\r
+ cur_val = dead_cycles; \r
+ else\r
+ cur_val = insert_penalties;\r
+\r
+ cur_val_level = 0;\r
+ }\r
+ break;\r
+\r
+ case set_page_dimen:\r
+ {\r
+ if ((page_contents == 0) && (! output_active))\r
+ if (m == 0)\r
+ cur_val = max_dimen;\r
+ else\r
+ cur_val = 0;\r
+ else\r
+ cur_val = page_so_far[m];\r
+\r
+ cur_val_level = dimen_val;\r
+ }\r
+ break;\r
+\r
+ case set_shape:\r
+ {\r
+ if (par_shape_ptr == 0)\r
+ cur_val = 0; \r
+ else\r
+ cur_val = info(par_shape_ptr);\r
+\r
+ cur_val_level = int_val;\r
+ }\r
+ break;\r
+\r
+ case set_box_dimen:\r
+ {\r
+ scan_eight_bit_int();\r
+\r
+ if (box(cur_val) == 0)\r
+ cur_val = 0;\r
+ else\r
+ cur_val = mem[box(cur_val) + m].cint;\r
+\r
+ cur_val_level = dimen_val;\r
+ }\r
+ break;\r
+\r
+ case char_given:\r
+ case math_given:\r
+ scanned_result(cur_chr, int_val);\r
+ break;\r
+\r
+ case assign_font_dimen:\r
+ {\r
+ find_font_dimen(false);\r
+ font_info[fmem_ptr].cint = 0;\r
+ scanned_result(font_info[cur_val].cint, dimen_val);\r
+ }\r
+ break;\r
+\r
+ case assign_font_int:\r
+ {\r
+ scan_font_ident();\r
+\r
+ if (m == 0)\r
+ scanned_result(hyphen_char[cur_val], int_val);\r
+ else\r
+ scanned_result(skew_char[cur_val], int_val);\r
+ }\r
+ break;\r
+\r
+ case tex_register:\r
+ {\r
+ scan_eight_bit_int();\r
+\r
+ switch (m)\r
+ {\r
+ case int_val:\r
+ cur_val = count(cur_val);\r
+ break;\r
+\r
+ case dimen_val:\r
+ cur_val = dimen(cur_val);\r
+ break;\r
+\r
+ case glue_val:\r
+ cur_val = skip(cur_val);\r
+ break;\r
+\r
+ case mu_val:\r
+ cur_val = mu_skip(cur_val);\r
+ break;\r
+ }\r
+ \r
+ cur_val_level = m;\r
+ }\r
+ break;\r
+\r
+ case last_item:\r
+ if (cur_chr > glue_val)\r
+ {\r
+ if (cur_chr == input_line_no_code)\r
+ cur_val = line;\r
+ else\r
+ cur_val = last_badness;\r
+\r
+ cur_val_level = int_val;\r
+ }\r
+ else\r
+ {\r
+ if (cur_chr == glue_val)\r
+ cur_val = zero_glue;\r
+ else\r
+ cur_val = 0;\r
+\r
+ cur_val_level = cur_chr;\r
+\r
+ if (!is_char_node(tail) && (mode != 0))\r
+ switch (cur_chr)\r
+ {\r
+ case int_val:\r
+ if (type(tail) == penalty_node)\r
+ cur_val = penalty(tail);\r
+ break;\r
+\r
+ case dimen_val:\r
+ if (type(tail) == kern_node)\r
+ cur_val = width(tail);\r
+ break;\r
+\r
+ case glue_val:\r
+ if (type(tail) == glue_node)\r
+ {\r
+ cur_val = glue_ptr(tail);\r
+\r
+ if (subtype(tail) == mu_glue)\r
+ cur_val_level = mu_val;\r
+ }\r
+ break;\r
+ }\r
+ else if ((mode == vmode) && (tail == head))\r
+ switch (cur_chr)\r
+ {\r
+ case int_val:\r
+ cur_val = last_penalty;\r
+ break;\r
+\r
+ case dimen_val:\r
+ cur_val = last_kern;\r
+ break;\r
+\r
+ case glue_val:\r
+ if (last_glue != empty_flag)\r
+ cur_val = last_glue;\r
+ break;\r
+ }\r
+ }\r
+ break;\r
+\r
+ default:\r
+ {\r
+ print_err("You can't use `");\r
+ print_cmd_chr(cur_cmd, cur_chr);\r
+ prints("' after ");\r
+ print_esc("the");\r
+ help1("I'm forgetting what you said and using zero instead.");\r
+ error();\r
+\r
+ if (level != tok_val)\r
+ scanned_result(0, dimen_val);\r
+ else\r
+ scanned_result(0, int_val);\r
+ }\r
+ break;\r
+ }\r
+\r
+ while (cur_val_level > level)\r
+ {\r
+ if (cur_val_level == glue_val)\r
+ cur_val = width(cur_val);\r
+ else if (cur_val_level == mu_val)\r
+ mu_error();\r
+\r
+ decr(cur_val_level);\r
+ }\r
+\r
+ if (negative)\r
+ if (cur_val_level >= 2)\r
+ {\r
+ cur_val = new_spec(cur_val);\r
+\r
+ {\r
+ width(cur_val) = -width(cur_val);\r
+ stretch(cur_val) = -stretch(cur_val);\r
+ shrink(cur_val) = -shrink(cur_val);\r
+ }\r
+ }\r
+ else\r
+ cur_val = -cur_val;\r
+ else if ((cur_val_level >= glue_val) && (cur_val_level <= mu_val))\r
+ add_glue_ref(cur_val);\r
+}\r
+/* sec 0341 */\r
+void get_next (void)\r
+{\r
+ integer k;\r
+ halfword t;\r
+ /* char cat; */\r
+ int cat;\r
+ ASCII_code c, cc;\r
+ char d;\r
+\r
+restart:\r
+ cur_cs = 0;\r
+\r
+ if (state != token_list)\r
+ {\r
+lab_switch:\r
+ if (loc <= limit)\r
+ {\r
+ cur_chr = buffer[loc];\r
+ incr(loc);\r
+\r
+reswitch:\r
+ cur_cmd = cat_code(cur_chr);\r
+\r
+ switch (state + cur_cmd)\r
+ {\r
+ case any_state_plus(ignore):\r
+ case skip_blanks + spacer:\r
+ case new_line + spacer:\r
+ goto lab_switch;\r
+ break;\r
+\r
+ case any_state_plus(escape):\r
+ {\r
+ if (loc > limit)\r
+ cur_cs = null_cs;\r
+ else\r
+ {\r
+start_cs:\r
+ k = loc;\r
+ cur_chr = buffer[k];\r
+ cat = cat_code(cur_chr);\r
+ incr(k);\r
+\r
+ if (cat == letter)\r
+ state = skip_blanks;\r
+ else if (cat == spacer)\r
+ state = skip_blanks;\r
+ else\r
+ state = mid_line;\r
+\r
+ if ((cat == letter) && (k <= limit))\r
+ {\r
+ do\r
+ {\r
+ cur_chr = buffer[k];\r
+ cat = cat_code(cur_chr);\r
+ incr(k);\r
+ }\r
+ while (!((cat != letter) || (k > limit)));\r
+\r
+ {\r
+ if (buffer[k]== cur_chr)\r
+ if (cat == sup_mark)\r
+ if (k < limit)\r
+ {\r
+ c = buffer[k + 1];\r
+\r
+ if (c < 128)\r
+ {\r
+ d = 2;\r
+ if (is_hex(c))\r
+ if (k + 2 <= limit)\r
+ {\r
+ cc = buffer[k + 2];\r
+\r
+ if (is_hex(cc))\r
+ incr(d);\r
+ }\r
+\r
+ if (d > 2)\r
+ {\r
+ hex_to_cur_chr();\r
+ buffer[k - 1] = cur_chr;\r
+ }\r
+ else if (c < 64)\r
+ buffer[k - 1] = c + 64;\r
+ else\r
+ buffer[k - 1] = c - 64;\r
+\r
+ limit = limit - d;\r
+ first = first - d;\r
+\r
+ while (k <= limit)\r
+ {\r
+ buffer[k] = buffer[k + d];\r
+ incr(k);\r
+ }\r
+\r
+ goto start_cs;\r
+ }\r
+ }\r
+ }\r
+\r
+ if (cat != letter)\r
+ decr(k);\r
+\r
+ if (k > loc + 1)\r
+ {\r
+ cur_cs = id_lookup(loc, k - loc);\r
+ loc = k;\r
+ goto found;\r
+ }\r
+ }\r
+ else\r
+ {\r
+ if (buffer[k] == cur_chr)\r
+ if (cat == sup_mark)\r
+ if (k < limit)\r
+ {\r
+ c = buffer[k + 1];\r
+\r
+ if (c < 128)\r
+ {\r
+ d = 2;\r
+\r
+ if (is_hex(c))\r
+ if (k + 2 <= limit)\r
+ {\r
+ cc = buffer[k + 2];\r
+\r
+ if (is_hex(cc))\r
+ incr(d);\r
+ }\r
+\r
+ if (d > 2)\r
+ {\r
+ hex_to_cur_chr();\r
+ buffer[k - 1] = cur_chr;\r
+ }\r
+ else if (c < 64)\r
+ buffer[k - 1] = c + 64;\r
+ else\r
+ buffer[k - 1] = c - 64;\r
+\r
+ limit = limit - d;\r
+ first = first - d;\r
+\r
+ while (k <= limit)\r
+ {\r
+ buffer[k] = buffer[k + d];\r
+ incr(k);\r
+ }\r
+\r
+ goto start_cs;\r
+ }\r
+ }\r
+ }\r
+\r
+ cur_cs = single_base + buffer[loc];\r
+ incr(loc);\r
+ }\r
+found:\r
+ cur_cmd = eq_type(cur_cs);\r
+ cur_chr = equiv(cur_cs);\r
+ \r
+ if (cur_cmd >= outer_call)\r
+ check_outer_validity();\r
+ }\r
+ break;\r
+\r
+ case any_state_plus(active_char):\r
+ {\r
+ cur_cs = cur_chr + active_base;\r
+ cur_cmd = eq_type(cur_cs);\r
+ cur_chr = equiv(cur_cs);\r
+ state = mid_line;\r
+ \r
+ if (cur_cmd >= outer_call)\r
+ check_outer_validity();\r
+ }\r
+ break;\r
+\r
+ case any_state_plus(sup_mark):\r
+ {\r
+ if (cur_chr == buffer[loc])\r
+ if (loc < limit)\r
+ {\r
+ c = buffer[loc + 1];\r
+\r
+ if (c < 128)\r
+ {\r
+ loc = loc + 2;\r
+\r
+ if (is_hex(c))\r
+ if (loc <= limit)\r
+ {\r
+ cc = buffer[loc];\r
+\r
+ if (is_hex(cc))\r
+ {\r
+ incr(loc);\r
+ hex_to_cur_chr();\r
+ goto reswitch;\r
+ }\r
+ }\r
+\r
+ if (c < 64)\r
+ cur_chr = c + 64;\r
+ else\r
+ cur_chr = c - 64;\r
+\r
+ goto reswitch;\r
+ }\r
+ }\r
+\r
+ state = mid_line;\r
+ }\r
+ break;\r
+\r
+ case any_state_plus(invalid_char):\r
+ {\r
+ print_err("Text line contains an invalid character");\r
+ help2("A funny symbol that I can't read has just been input.",\r
+ "Continue, and I'll forget that it ever happened.");\r
+ deletions_allowed = false;\r
+ error();\r
+ deletions_allowed = true;\r
+ goto restart;\r
+ }\r
+ break;\r
+\r
+ case mid_line + spacer:\r
+ {\r
+ state = skip_blanks;\r
+ cur_chr = ' ';\r
+ }\r
+ break;\r
+\r
+ case mid_line + car_ret:\r
+ {\r
+ loc = limit + 1;\r
+ cur_cmd = spacer;\r
+ cur_chr = ' ';\r
+ }\r
+ break;\r
+\r
+ case skip_blanks + car_ret:\r
+ case any_state_plus(comment):\r
+ {\r
+ loc = limit + 1;\r
+ goto lab_switch;\r
+ }\r
+ break;\r
+\r
+ case new_line + car_ret:\r
+ {\r
+ loc = limit + 1;\r
+ cur_cs = par_loc;\r
+ cur_cmd = eq_type(cur_cs);\r
+ cur_chr = equiv(cur_cs);\r
+ \r
+ if (cur_cmd >= outer_call)\r
+ check_outer_validity();\r
+ }\r
+ break;\r
+\r
+ case mid_line + left_brace:\r
+ incr(align_state);\r
+ break;\r
+\r
+ case skip_blanks + left_brace:\r
+ case new_line + left_brace:\r
+ {\r
+ state = mid_line;\r
+ incr(align_state);\r
+ }\r
+ break;\r
+\r
+ case mid_line + right_brace:\r
+ decr(align_state);\r
+ break;\r
+\r
+ case skip_blanks + right_brace:\r
+ case new_line + right_brace:\r
+ {\r
+ state = mid_line;\r
+ decr(align_state);\r
+ }\r
+ break;\r
+\r
+ case add_delims_to(skip_blanks):\r
+ case add_delims_to(new_line):\r
+ state = 1;\r
+ break;\r
+\r
+ default:\r
+ break;\r
+ }\r
+ }\r
+ else\r
+ {\r
+ state = new_line;\r
+\r
+ if (name > 17)\r
+ {\r
+ incr(line);\r
+ first = start;\r
+\r
+ if (!force_eof)\r
+ {\r
+ if (input_ln(cur_file, true))\r
+ firm_up_the_line();\r
+ else\r
+ force_eof = true;\r
+ }\r
+\r
+ if (force_eof)\r
+ {\r
+ print_char(')');\r
+ decr(open_parens);\r
+ update_terminal();\r
+ force_eof = false;\r
+ end_file_reading();\r
+ check_outer_validity();\r
+ goto restart;\r
+ }\r
+\r
+ if (end_line_char_inactive())\r
+ decr(limit);\r
+ else\r
+ buffer[limit] = end_line_char;\r
+\r
+ first = limit + 1;\r
+ loc = start;\r
+ }\r
+ else\r
+ {\r
+ if (!(name == 0))\r
+ {\r
+ cur_cmd = 0;\r
+ cur_chr = 0;\r
+ return;\r
+ }\r
+\r
+ if (input_ptr > 0)\r
+ {\r
+ end_file_reading();\r
+ goto restart;\r
+ }\r
+\r
+ if (selector < log_only)\r
+ open_log_file();\r
+\r
+ if (interaction > nonstop_mode)\r
+ {\r
+ if (end_line_char_inactive())\r
+ incr(limit);\r
+\r
+ if (limit == start)\r
+ print_nl("(Please type a command or say `\\end')");\r
+\r
+ print_ln();\r
+ first = start;\r
+ prompt_input("*");\r
+ limit = last;\r
+\r
+ if (end_line_char_inactive())\r
+ decr(limit);\r
+ else\r
+ buffer[limit]= end_line_char;\r
+\r
+ first = limit + 1;\r
+ loc = start;\r
+ }\r
+ else\r
+ {\r
+ fatal_error("*** (job aborted, no legal \\end found)");\r
+ return;\r
+ }\r
+ }\r
+\r
+ check_interrupt();\r
+ goto lab_switch;\r
+ }\r
+ }\r
+ else if (loc != 0)\r
+ {\r
+ t = info(loc);\r
+ loc = link(loc);\r
+\r
+ if (t >= cs_token_flag)\r
+ {\r
+ cur_cs = t - cs_token_flag;\r
+ cur_cmd = eq_type(cur_cs);\r
+ cur_chr = equiv(cur_cs);\r
+\r
+ if (cur_cmd >= outer_call)\r
+ if (cur_cmd == dont_expand)\r
+ {\r
+ cur_cs = info(loc) - cs_token_flag;\r
+ loc = 0;\r
+ cur_cmd = eq_type(cur_cs);\r
+ cur_chr = equiv(cur_cs);\r
+\r
+ if (cur_cmd > max_command)\r
+ {\r
+ cur_cmd = relax;\r
+ cur_chr = no_expand_flag;\r
+ }\r
+ }\r
+ else\r
+ {\r
+ check_outer_validity();\r
+ }\r
+ }\r
+ else\r
+ {\r
+ cur_cmd = t / 256;\r
+ cur_chr = t % 256;\r
+\r
+ switch (cur_cmd)\r
+ {\r
+ case left_brace:\r
+ incr(align_state);\r
+ break;\r
+\r
+ case right_brace:\r
+ decr(align_state);\r
+ break;\r
+\r
+ case out_param:\r
+ {\r
+ begin_token_list(param_stack[limit + cur_chr - 1], parameter);\r
+ goto restart;\r
+ }\r
+ break;\r
+\r
+ default:\r
+ break;\r
+ }\r
+ }\r
+ }\r
+ else\r
+ {\r
+ end_token_list();\r
+ goto restart;\r
+ }\r
+\r
+ if (cur_cmd <= car_ret)\r
+ if (cur_cmd >= tab_mark)\r
+ if (align_state == 0)\r
+ {\r
+ if ((scanner_status == aligning) && (cur_align == 0))\r
+ {\r
+ fatal_error("(interwoven alignment preambles are not allowed)");\r
+ return;\r
+ }\r
+\r
+ cur_cmd = extra_info(cur_align);\r
+ extra_info(cur_align) = cur_chr;\r
+\r
+ if (cur_cmd == omit)\r
+ begin_token_list(omit_template, v_template);\r
+ else\r
+ begin_token_list(v_part(cur_align), v_template);\r
+\r
+ align_state = 1000000L;\r
+ goto restart;\r
+ }\r
+}
\ No newline at end of file
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