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common.c
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common.c
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/*1:*/
#line 58 "common.w"
/*5:*/
#line 102 "common.w"
#include <ctype.h>
/*:5*//*8:*/
#line 165 "common.w"
#include <stdio.h>
/*:8*//*22:*/
#line 471 "common.w"
#include <stdlib.h>
/*:22*/
#line 59 "common.w"
#define ctangle 0
#define cweave 1 \
#define and_and 04
#define lt_lt 020
#define gt_gt 021
#define plus_plus 013
#define minus_minus 01
#define minus_gt 031
#define not_eq 032
#define lt_eq 034
#define gt_eq 035
#define eq_eq 036
#define or_or 037
#define dot_dot_dot 016
#define colon_colon 06
#define period_ast 026
#define minus_gt_ast 027 \
#define buf_size 100
#define longest_name 10000
#define long_buf_size (buf_size+longest_name)
#define xisspace(c) (isspace(c) &&((unsigned char) c<0200) )
#define xisupper(c) (isupper(c) &&((unsigned char) c<0200) ) \
#define max_include_depth 10 \
#define max_file_name_length 60
#define cur_file file[include_depth]
#define cur_file_name file_name[include_depth]
#define cur_line line[include_depth]
#define web_file file[0]
#define web_file_name file_name[0] \
#define lines_dont_match (change_limit-change_buffer!=limit-buffer|| \
strncmp(buffer,change_buffer,limit-buffer) ) \
#define if_section_start_make_pending(b) {*limit= '!'; \
for(loc= buffer;xisspace(*loc) ;loc++) ; \
*limit= ' '; \
if(*loc=='@'&&(xisspace(*(loc+1) ) ||*(loc+1) =='*') ) change_pending= b; \
} \
#define max_sections 2000 \
\
#define too_long() {include_depth--; \
err_print("! Include file name too long") ;goto restart;} \
#define max_bytes 90000 \
#define max_names 4000 \
\
#define length(c) (c+1) ->byte_start-(c) ->byte_start
#define print_id(c) term_write((c) ->byte_start,length((c) ) ) \
#define hash_size 353 \
#define llink link
#define rlink dummy.Rlink
#define root name_dir->rlink \
\
#define first_chunk(p) ((p) ->byte_start+2)
#define prefix_length(p) (int) ((unsigned char) *((p) ->byte_start) *256+ \
(unsigned char) *((p) ->byte_start+1) )
#define set_prefix_length(p,m) (*((p) ->byte_start) = (m) /256, \
*((p) ->byte_start+1) = (m) %256) \
#define less 0
#define equal 1
#define greater 2
#define prefix 3
#define extension 4 \
#define bad_extension 5 \
#define spotless 0
#define harmless_message 1
#define error_message 2
#define fatal_message 3
#define mark_harmless {if(history==spotless) history= harmless_message;}
#define mark_error history= error_message \
#define confusion(s) fatal("! This can't happen: ",s) \
\
#define show_banner flags['b']
#define show_progress flags['p']
#define show_stats flags['s']
#define show_happiness flags['h'] \
#define update_terminal fflush(stdout) \
#define new_line putchar('\n')
#define putxchar putchar
#define term_write(a,b) fflush(stdout) ,fwrite(a,sizeof(char) ,b,stdout)
#define C_printf(c,a) fprintf(C_file,c,a)
#define C_putc(c) putc(c,C_file) \
#line 60 "common.w"
/*2:*/
#line 73 "common.w"
typedef short boolean;
boolean program;
/*:2*//*7:*/
#line 159 "common.w"
char buffer[long_buf_size];
char*buffer_end= buffer+buf_size-2;
char*limit= buffer;
char*loc= buffer;
/*:7*//*10:*/
#line 214 "common.w"
int include_depth;
FILE*file[max_include_depth];
FILE*change_file;
char file_name[max_include_depth][max_file_name_length];
char change_file_name[max_file_name_length];
char alt_web_file_name[max_file_name_length];
int line[max_include_depth];
int change_line;
int change_depth;
boolean input_has_ended;
boolean changing;
boolean web_file_open= 0;
/*:10*//*20:*/
#line 418 "common.w"
typedef unsigned short sixteen_bits;
sixteen_bits section_count;
boolean changed_section[max_sections];
boolean change_pending;
boolean print_where= 0;
/*:20*//*27:*/
#line 594 "common.w"
typedef struct name_info{
char*byte_start;
/*31:*/
#line 631 "common.w"
struct name_info*link;
/*:31*//*40:*/
#line 730 "common.w"
union{
struct name_info*Rlink;
char Ilk;
}dummy;
/*:40*//*55:*/
#line 1062 "common.w"
char*equiv_or_xref;
/*:55*/
#line 597 "common.w"
}name_info;
typedef name_info*name_pointer;
char byte_mem[max_bytes];
char*byte_mem_end= byte_mem+max_bytes-1;
name_info name_dir[max_names];
name_pointer name_dir_end= name_dir+max_names-1;
/*:27*//*29:*/
#line 617 "common.w"
name_pointer name_ptr;
char*byte_ptr;
/*:29*//*32:*/
#line 644 "common.w"
typedef name_pointer*hash_pointer;
name_pointer hash[hash_size];
hash_pointer hash_end= hash+hash_size-1;
hash_pointer h;
/*:32*//*56:*/
#line 1082 "common.w"
int history= spotless;
/*:56*//*67:*/
#line 1220 "common.w"
int argc;
char**argv;
char C_file_name[max_file_name_length];
char tex_file_name[max_file_name_length];
char idx_file_name[max_file_name_length];
char scn_file_name[max_file_name_length];
boolean flags[128];
/*:67*//*77:*/
#line 1370 "common.w"
FILE*C_file;
FILE*tex_file;
FILE*idx_file;
FILE*scn_file;
FILE*active_file;
/*:77*/
#line 61 "common.w"
/*3:*/
#line 83 "common.w"
int phase;
/*:3*//*11:*/
#line 240 "common.w"
char change_buffer[buf_size];
char*change_limit;
/*:11*/
#line 62 "common.w"
/*33:*/
#line 650 "common.w"
extern int names_match();
/*:33*//*38:*/
#line 703 "common.w"
void init_p();
/*:38*//*46:*/
#line 852 "common.w"
extern void init_node();
/*:46*//*53:*/
#line 1017 "common.w"
int section_name_cmp();
/*:53*//*57:*/
#line 1092 "common.w"
void err_print();
/*:57*//*60:*/
#line 1140 "common.w"
int wrap_up();
extern void print_stats();
/*:60*//*63:*/
#line 1173 "common.w"
void fatal(),overflow();
/*:63*//*69:*/
#line 1251 "common.w"
void scan_args();
/*:69*//*81:*/
#line 1411 "common.w"
extern int strlen();
extern int strcmp();
extern char*strcpy();
extern int strncmp();
extern char*strncpy();
/*:81*/
#line 63 "common.w"
/*:1*//*4:*/
#line 89 "common.w"
void
common_init()
{
/*30:*/
#line 621 "common.w"
name_dir->byte_start= byte_ptr= byte_mem;
name_ptr= name_dir+1;
name_ptr->byte_start= byte_mem;
/*:30*//*34:*/
#line 655 "common.w"
for(h= hash;h<=hash_end;*h++= NULL);
/*:34*//*41:*/
#line 737 "common.w"
root= NULL;
/*:41*/
#line 93 "common.w"
;
/*68:*/
#line 1233 "common.w"
show_banner= show_happiness= show_progress= 1;
/*:68*/
#line 94 "common.w"
;
/*78:*/
#line 1377 "common.w"
scan_args();
if(program==ctangle){
if((C_file= fopen(C_file_name,"w"))==NULL)
fatal("! Cannot open output file ",C_file_name);
}
else{
if((tex_file= fopen(tex_file_name,"w"))==NULL)
fatal("! Cannot open output file ",tex_file_name);
}
/*:78*/
#line 95 "common.w"
;
}
/*:4*//*9:*/
#line 172 "common.w"
int input_ln(fp)
FILE*fp;
{
register int c= EOF;
register char*k;
if(feof(fp))return(0);
limit= k= buffer;
while(k<=buffer_end&&(c= getc(fp))!=EOF&&c!='\n')
if((*(k++)= c)!=' ')limit= k;
if(k> buffer_end)
if((c= getc(fp))!=EOF&&c!='\n'){
ungetc(c,fp);loc= buffer;err_print("! Input line too long");
}
if(c==EOF&&limit==buffer)return(0);
return(1);
}
/*:9*//*12:*/
#line 251 "common.w"
void
prime_the_change_buffer()
{
change_limit= change_buffer;
/*13:*/
#line 265 "common.w"
while(1){
change_line++;
if(!input_ln(change_file))return;
if(limit<buffer+2)continue;
if(buffer[0]!='@')continue;
if(xisupper(buffer[1]))buffer[1]= tolower(buffer[1]);
if(buffer[1]=='x')break;
if(buffer[1]=='y'||buffer[1]=='z'||buffer[1]=='i'){
loc= buffer+2;
err_print("! Missing @x in change file");
}
}
/*:13*/
#line 256 "common.w"
;
/*14:*/
#line 282 "common.w"
do{
change_line++;
if(!input_ln(change_file)){
err_print("! Change file ended after @x");
return;
}
}while(limit==buffer);
/*:14*/
#line 257 "common.w"
;
/*15:*/
#line 292 "common.w"
{
change_limit= change_buffer+(limit-buffer);
strncpy(change_buffer,buffer,limit-buffer+1);
}
/*:15*/
#line 258 "common.w"
;
}
/*:12*//*16:*/
#line 320 "common.w"
void
check_change()
{
int n= 0;
if(lines_dont_match)return;
change_pending= 0;
if(!changed_section[section_count]){
if_section_start_make_pending(1);
if(!change_pending)changed_section[section_count]= 1;
}
while(1){
changing= 1;print_where= 1;change_line++;
if(!input_ln(change_file)){
err_print("! Change file ended before @y");
change_limit= change_buffer;changing= 0;
return;
}
if(limit> buffer+1&&buffer[0]=='@'){
char xyz_code= xisupper(buffer[1])?tolower(buffer[1]):buffer[1];
/*17:*/
#line 358 "common.w"
if(xyz_code=='x'||xyz_code=='z'){
loc= buffer+2;err_print("! Where is the matching @y?");
}
else if(xyz_code=='y'){
if(n> 0){
loc= buffer+2;
printf("\n! Hmm... %d ",n);
err_print("of the preceding lines failed to match");
}
change_depth= include_depth;
return;
}
/*:17*/
#line 342 "common.w"
;
}
/*15:*/
#line 292 "common.w"
{
change_limit= change_buffer+(limit-buffer);
strncpy(change_buffer,buffer,limit-buffer+1);
}
/*:15*/
#line 344 "common.w"
;
changing= 0;cur_line++;
while(!input_ln(cur_file)){
if(include_depth==0){
err_print("! CWEB file ended during a change");
input_has_ended= 1;return;
}
include_depth--;cur_line++;
}
if(lines_dont_match)n++;
}
}
/*:16*//*18:*/
#line 378 "common.w"
void
reset_input()
{
limit= buffer;loc= buffer+1;buffer[0]= ' ';
/*19:*/
#line 393 "common.w"
if((web_file= fopen(web_file_name,"r"))==NULL){
strcpy(web_file_name,alt_web_file_name);
if((web_file= fopen(web_file_name,"r"))==NULL)
fatal("! Cannot open input file ",web_file_name);
}
web_file_open= 1;
if((change_file= fopen(change_file_name,"r"))==NULL)
fatal("! Cannot open change file ",change_file_name);
/*:19*/
#line 383 "common.w"
;
include_depth= 0;cur_line= 0;change_line= 0;
change_depth= include_depth;
changing= 1;prime_the_change_buffer();changing= !changing;
limit= buffer;loc= buffer+1;buffer[0]= ' ';input_has_ended= 0;
}
/*:18*//*21:*/
#line 426 "common.w"
int get_line()
{
restart:
if(changing&&include_depth==change_depth)
/*25:*/
#line 537 "common.w"
{
change_line++;
if(!input_ln(change_file)){
err_print("! Change file ended without @z");
buffer[0]= '@';buffer[1]= 'z';limit= buffer+2;
}
if(limit> buffer){
if(change_pending){
if_section_start_make_pending(0);
if(change_pending){
changed_section[section_count]= 1;change_pending= 0;
}
}
*limit= ' ';
if(buffer[0]=='@'){
if(xisupper(buffer[1]))buffer[1]= tolower(buffer[1]);
if(buffer[1]=='x'||buffer[1]=='y'){
loc= buffer+2;
err_print("! Where is the matching @z?");
}
else if(buffer[1]=='z'){
prime_the_change_buffer();changing= !changing;print_where= 1;
}
}
}
}
/*:25*/
#line 431 "common.w"
;
if(!changing||include_depth> change_depth){
/*24:*/
#line 520 "common.w"
{
cur_line++;
while(!input_ln(cur_file)){
print_where= 1;
if(include_depth==0){input_has_ended= 1;break;}
else{
fclose(cur_file);include_depth--;
if(changing&&include_depth==change_depth)break;
cur_line++;
}
}
if(!changing&&!input_has_ended)
if(limit-buffer==change_limit-change_buffer)
if(buffer[0]==change_buffer[0])
if(change_limit> change_buffer)check_change();
}
/*:24*/
#line 433 "common.w"
;
if(changing&&include_depth==change_depth)goto restart;
}
if(input_has_ended)return 0;
loc= buffer;*limit= ' ';
if(buffer[0]=='@'&&(buffer[1]=='i'||buffer[1]=='I')){
loc= buffer+2;*limit= '"';
while(*loc==' '||*loc=='\t')loc++;
if(loc>=limit){
err_print("! Include file name not given");
goto restart;
}
if(include_depth>=max_include_depth-1){
err_print("! Too many nested includes");
goto restart;
}
include_depth++;
/*23:*/
#line 474 "common.w"
{
char temp_file_name[max_file_name_length];
char*cur_file_name_end= cur_file_name+max_file_name_length-1;
char*k= cur_file_name,*kk;
int l;
if(*loc=='"'){
loc++;
while(*loc!='"'&&k<=cur_file_name_end)*k++= *loc++;
if(loc==limit)k= cur_file_name_end+1;
}else
while(*loc!=' '&&*loc!='\t'&&*loc!='"'&&k<=cur_file_name_end)*k++= *loc++;
if(k> cur_file_name_end)too_long();
*k= '\0';
if((cur_file= fopen(cur_file_name,"r"))!=NULL){
cur_line= 0;print_where= 1;
goto restart;
}
kk= getenv("CWEBINPUTS");
if(kk!=NULL){
if((l= strlen(kk))> max_file_name_length-2)too_long();
strcpy(temp_file_name,kk);
}
else{
#ifdef CWEBINPUTS
if((l= strlen(CWEBINPUTS))> max_file_name_length-2)too_long();
strcpy(temp_file_name,CWEBINPUTS);
#else
l= 0;
#endif
}
if(l> 0){
if(k+l+2>=cur_file_name_end)too_long();
for(;k>=cur_file_name;k--)*(k+l+1)= *k;
strcpy(cur_file_name,temp_file_name);
cur_file_name[l]= '/';
if((cur_file= fopen(cur_file_name,"r"))!=NULL){
cur_line= 0;print_where= 1;
goto restart;
}
}
include_depth--;err_print("! Cannot open include file");goto restart;
}
/*:23*/
#line 452 "common.w"
;
}
return 1;
}
/*:21*//*26:*/
#line 569 "common.w"
void
check_complete(){
if(change_limit!=change_buffer){
strncpy(buffer,change_buffer,change_limit-change_buffer+1);
limit= buffer+(int)(change_limit-change_buffer);
changing= 1;change_depth= include_depth;loc= buffer;
err_print("! Change file entry did not match");
}
}
/*:26*//*35:*/
#line 660 "common.w"
name_pointer
id_lookup(first,last,t)
char*first;
char*last;
char t;
{
char*i= first;
int h;
int l;
name_pointer p;
if(last==NULL)for(last= first;*last!='\0';last++);
l= last-first;
/*36:*/
#line 683 "common.w"
h= (unsigned char)*i;
while(++i<last)h= (h+h+(int)((unsigned char)*i))%hash_size;
/*:36*/
#line 673 "common.w"
;
/*37:*/
#line 691 "common.w"
p= hash[h];
while(p&&!names_match(p,first,l,t))p= p->link;
if(p==NULL){
p= name_ptr;
p->link= hash[h];hash[h]= p;
}
/*:37*/
#line 674 "common.w"
;
if(p==name_ptr)/*39:*/
#line 706 "common.w"
{
if(byte_ptr+l> byte_mem_end)overflow("byte memory");
if(name_ptr>=name_dir_end)overflow("name");
strncpy(byte_ptr,first,l);
(++name_ptr)->byte_start= byte_ptr+= l;
if(program==cweave)init_p(p,t);
}
/*:39*/
#line 675 "common.w"
;
return(p);
}
/*:35*//*42:*/
#line 764 "common.w"
void
print_section_name(p)
name_pointer p;
{
char*ss,*s= first_chunk(p);
name_pointer q= p+1;
while(p!=name_dir){
ss= (p+1)->byte_start-1;
if(*ss==' '&&ss>=s){
term_write(s,ss-s);p= q->link;q= p;
}else{
term_write(s,ss+1-s);p= name_dir;q= NULL;
}
s= p->byte_start;
}
if(q)term_write("...",3);
}
/*:42*//*43:*/
#line 783 "common.w"
void
sprint_section_name(dest,p)
char*dest;
name_pointer p;
{
char*ss,*s= first_chunk(p);
name_pointer q= p+1;
while(p!=name_dir){
ss= (p+1)->byte_start-1;
if(*ss==' '&&ss>=s){
p= q->link;q= p;
}else{
ss++;p= name_dir;
}
strncpy(dest,s,ss-s),dest+= ss-s;
s= p->byte_start;
}
*dest= '\0';
}
/*:43*//*44:*/
#line 804 "common.w"
void
print_prefix_name(p)
name_pointer p;
{
char*s= first_chunk(p);
int l= prefix_length(p);
term_write(s,l);
if(s+l<(p+1)->byte_start)term_write("...",3);
}
/*:44*//*45:*/
#line 825 "common.w"
int web_strcmp(j,j_len,k,k_len)
char*j,*k;
int j_len,k_len;
{
char*j1= j+j_len,*k1= k+k_len;
while(k<k1&&j<j1&&*j==*k)k++,j++;
if(k==k1)if(j==j1)return equal;
else return extension;
else if(j==j1)return prefix;
else if(*j<*k)return less;
else return greater;
}
/*:45*//*47:*/
#line 855 "common.w"
name_pointer
add_section_name(par,c,first,last,ispref)
name_pointer par;
int c;
char*first;
char*last;
int ispref;
{
name_pointer p= name_ptr;
char*s= first_chunk(p);
int name_len= last-first+ispref;
if(s+name_len> byte_mem_end)overflow("byte memory");
if(name_ptr+1>=name_dir_end)overflow("name");
(++name_ptr)->byte_start= byte_ptr= s+name_len;
if(ispref){
*(byte_ptr-1)= ' ';
name_len--;
name_ptr->link= name_dir;
(++name_ptr)->byte_start= byte_ptr;
}
set_prefix_length(p,name_len);
strncpy(s,first,name_len);
p->llink= NULL;
p->rlink= NULL;
init_node(p);
return par==NULL?(root= p):c==less?(par->llink= p):(par->rlink= p);
}
/*:47*//*48:*/
#line 884 "common.w"
void
extend_section_name(p,first,last,ispref)
name_pointer p;
char*first;
char*last;
int ispref;
{
char*s;
name_pointer q= p+1;
int name_len= last-first+ispref;
if(name_ptr>=name_dir_end)overflow("name");
while(q->link!=name_dir)q= q->link;
q->link= name_ptr;
s= name_ptr->byte_start;
name_ptr->link= name_dir;
if(s+name_len> byte_mem_end)overflow("byte memory");
(++name_ptr)->byte_start= byte_ptr= s+name_len;
strncpy(s,first,name_len);
if(ispref)*(byte_ptr-1)= ' ';
}
/*:48*//*49:*/
#line 912 "common.w"
name_pointer
section_lookup(first,last,ispref)
char*first,*last;
int ispref;
{
int c= 0;
name_pointer p= root;
name_pointer q= NULL;
name_pointer r= NULL;
name_pointer par= NULL;
int name_len= last-first+1;
/*50:*/
#line 936 "common.w"
while(p){
c= web_strcmp(first,name_len,first_chunk(p),prefix_length(p));
if(c==less||c==greater){
if(r==NULL)
par= p;
p= (c==less?p->llink:p->rlink);
}else{
if(r!=NULL){
printf("\n! Ambiguous prefix: matches <");
print_prefix_name(p);
printf(">\n and <");
print_prefix_name(r);
err_print(">");
return name_dir;
}
r= p;
p= p->llink;
q= r->rlink;
}
if(p==NULL)
p= q,q= NULL;
}
/*:50*/
#line 926 "common.w"
;
/*51:*/
#line 961 "common.w"
if(r==NULL)
return add_section_name(par,c,first,last+1,ispref);
/*:51*/
#line 927 "common.w"
;
/*52:*/
#line 969 "common.w"
switch(section_name_cmp(&first,name_len,r)){
case prefix:
if(!ispref){
printf("\n! New name is a prefix of <");
print_section_name(r);
err_print(">");
}
else if(name_len<prefix_length(r))set_prefix_length(r,name_len);
case equal:return r;
case extension:if(!ispref||first<=last)
extend_section_name(r,first,last+1,ispref);
return r;
case bad_extension:
printf("\n! New name extends <");
print_section_name(r);
err_print(">");
return r;
default:
printf("\n! Section name incompatible with <");
print_prefix_name(r);
printf(">,\n which abbreviates <");
print_section_name(r);
err_print(">");
return r;
}
/*:52*/
#line 928 "common.w"
;
}
/*:49*//*54:*/
#line 1020 "common.w"
int section_name_cmp(pfirst,len,r)
char**pfirst;
int len;
name_pointer r;
{
char*first= *pfirst;
name_pointer q= r+1;
char*ss,*s= first_chunk(r);
int c;
int ispref;
while(1){
ss= (r+1)->byte_start-1;
if(*ss==' '&&ss>=r->byte_start)ispref= 1,q= q->link;
else ispref= 0,ss++,q= name_dir;
switch(c= web_strcmp(first,len,s,ss-s)){
case equal:if(q==name_dir)
if(ispref){
*pfirst= first+(ss-s);
return extension;
}else return equal;
else return(q->byte_start==(q+1)->byte_start)?equal:prefix;
case extension:
if(!ispref)return bad_extension;
first+= ss-s;
if(q!=name_dir){len-= ss-s;s= q->byte_start;r= q;continue;}
*pfirst= first;return extension;
default:return c;
}
}
}
/*:54*//*58:*/
#line 1095 "common.w"