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common.c
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common.c
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/*1:*/
#line 62 "common.w"
/*4:*/
#line 48 "common.h"
#include <ctype.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/*:4*/
#line 63 "common.w"
#define ctangle false
#define cweave true \
#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 non_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 compress(c) if(loc++<=limit) return c \
#define xisalpha(c) (isalpha((int) (c) ) &&((eight_bits) (c) <0200) )
#define xisdigit(c) (isdigit((int) (c) ) &&((eight_bits) (c) <0200) )
#define xisspace(c) (isspace((int) (c) ) &&((eight_bits) (c) <0200) )
#define xislower(c) (islower((int) (c) ) &&((eight_bits) (c) <0200) )
#define xisupper(c) (isupper((int) (c) ) &&((eight_bits) (c) <0200) )
#define xisxdigit(c) (isxdigit((int) (c) ) &&((eight_bits) (c) <0200) )
#define isxalpha(c) ((c) =='_'||(c) =='$') \
#define ishigh(c) ((eight_bits) (c) > 0177) \
\
#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 length(c) (size_t) ((c+1) ->byte_start-(c) ->byte_start)
#define print_id(c) term_write((c) ->byte_start,length(c) )
#define llink link
#define rlink dummy.Rlink
#define root name_dir->rlink \
#define ilk dummy.Ilk \
#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_happiness flags['h']
#define show_stats flags['s']
#define make_xrefs flags['x'] \
#define update_terminal() fflush(stdout)
#define new_line() putchar('\n')
#define term_write(a,b) fflush(stdout) ,fwrite(a,sizeof(char) ,b,stdout) \
#define buf_size 200
#define longest_name 10000 \
#define long_buf_size (buf_size+longest_name)
#define max_bytes 100000 \
#define max_names 5000 \
#define max_sections 2000 \
#define lines_dont_match (change_limit-change_buffer!=limit-buffer|| \
strncmp(buffer,change_buffer,(size_t) (limit-buffer) ) !=0) \
#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 too_long() {include_depth--; \
err_print("! Include file name too long") ;goto restart;} \
#define hash_size 353 \
#define first_chunk(p) ((p) ->byte_start+2)
#define prefix_length(p) (size_t) ((eight_bits) *((p) ->byte_start) *256+ \
(eight_bits) *((p) ->byte_start+1) )
#define set_prefix_length(p,m) (*((p) ->byte_start) = (char) ((m) /256) , \
*((p) ->byte_start+1) = (char) ((m) %256) ) \
#define less 0
#define equal 1
#define greater 2
#define prefix 3
#define extension 4 \
#define bad_extension 5 \
#define flag_change (**argv!='-')
#line 64 "common.w"
/*2:*/
#line 35 "common.h"
typedef bool boolean;
typedef uint8_t eight_bits;
typedef uint16_t sixteen_bits;
extern boolean program;
extern int phase;
/*:2*//*5:*/
#line 78 "common.h"
extern char section_text[];
extern char*section_text_end;
extern char*id_first;
extern char*id_loc;
/*:5*//*6:*/
#line 96 "common.h"
extern char buffer[];
extern char*buffer_end;
extern char*loc;
extern char*limit;
/*:6*//*7:*/
#line 113 "common.h"
extern int include_depth;
extern FILE*file[];
extern FILE*change_file;
extern char file_name[][max_file_name_length];
extern char change_file_name[];
extern int line[];
extern int change_line;
extern int change_depth;
extern boolean input_has_ended;
extern boolean changing;
extern boolean web_file_open;
/*:7*//*9:*/
#line 133 "common.h"
extern sixteen_bits section_count;
extern boolean changed_section[];
extern boolean change_pending;
extern boolean print_where;
/*:9*//*10:*/
#line 148 "common.h"
typedef struct name_info{
char*byte_start;
struct name_info*link;
union{
struct name_info*Rlink;
eight_bits Ilk;
}dummy;
void*equiv_or_xref;
}name_info;
typedef name_info*name_pointer;
typedef name_pointer*hash_pointer;
extern char byte_mem[];
extern char*byte_mem_end;
extern char*byte_ptr;
extern name_info name_dir[];
extern name_pointer name_dir_end;
extern name_pointer name_ptr;
extern name_pointer hash[];
extern hash_pointer hash_end;
extern hash_pointer hash_ptr;
/*:10*//*12:*/
#line 193 "common.h"
extern int history;
/*:12*//*14:*/
#line 211 "common.h"
extern int argc;
extern char**argv;
extern char C_file_name[];
extern char tex_file_name[];
extern char idx_file_name[];
extern char scn_file_name[];
extern boolean flags[];
/*:14*//*15:*/
#line 225 "common.h"
extern FILE*C_file;
extern FILE*tex_file;
extern FILE*idx_file;
extern FILE*scn_file;
extern FILE*active_file;
/*:15*/
#line 65 "common.w"
/*18:*/
#line 79 "common.w"
boolean program;
/*:18*//*19:*/
#line 88 "common.w"
int phase;
/*:19*//*21:*/
#line 126 "common.w"
char section_text[longest_name+1];
char*section_text_end= section_text+longest_name;
char*id_first;
char*id_loc;
/*:21*//*22:*/
#line 146 "common.w"
char buffer[long_buf_size];
char*buffer_end= buffer+buf_size-2;
char*loc= buffer;
char*limit= buffer;
/*:22*//*25:*/
#line 190 "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];
static 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= false;
/*:25*//*26:*/
#line 216 "common.w"
static char change_buffer[buf_size];
static char*change_limit;
/*:26*//*42:*/
#line 545 "common.w"
sixteen_bits section_count;
boolean changed_section[max_sections];
boolean change_pending;
boolean print_where= false;
/*:42*//*43:*/
#line 590 "common.w"
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;
/*:43*//*44:*/
#line 601 "common.w"
char*byte_ptr;
name_pointer name_ptr;
/*:44*//*46:*/
#line 621 "common.w"
name_pointer hash[hash_size]= {NULL};
hash_pointer hash_end= hash+hash_size-1;
hash_pointer hash_ptr;
/*:46*//*65:*/
#line 999 "common.w"
int history= spotless;
/*:65*//*73:*/
#line 1124 "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];
/*:73*//*83:*/
#line 1267 "common.w"
FILE*C_file;
FILE*tex_file;
FILE*idx_file;
FILE*scn_file;
FILE*active_file;
/*:83*/
#line 66 "common.w"
/*3:*/
#line 43 "common.h"
extern void common_init(void);
/*:3*//*8:*/
#line 127 "common.h"
extern boolean get_line(void);
extern void check_complete(void);
extern void reset_input(void);
/*:8*//*11:*/
#line 171 "common.h"
extern name_pointer id_lookup(const char*,const char*,eight_bits);
extern name_pointer section_lookup(char*,char*,boolean);
extern void print_prefix_name(name_pointer);
extern void print_section_name(name_pointer);
extern void sprint_section_name(char*,name_pointer);
extern boolean names_match(name_pointer,const char*,size_t,eight_bits);
extern void init_node(name_pointer);
/*:11*//*13:*/
#line 196 "common.h"
extern int wrap_up(void);
extern void err_print(const char*);
extern void fatal(const char*,const char*);
extern void overflow(const char*);
extern void print_stats(void);
/*:13*//*24:*/
#line 176 "common.w"
static boolean input_ln(FILE*);
/*:24*//*28:*/
#line 237 "common.w"
static void prime_the_change_buffer(void);
/*:28*//*33:*/
#line 334 "common.w"
static void check_change(void);
/*:33*//*55:*/
#line 760 "common.w"
static int web_strcmp(char*,size_t,char*,size_t);
static name_pointer add_section_name(name_pointer,int,char*,char*,boolean);
static void extend_section_name(name_pointer,char*,char*,boolean);
/*:55*//*64:*/
#line 987 "common.w"
static int section_name_cmp(char**,size_t,name_pointer);
/*:64*//*76:*/
#line 1184 "common.w"
static void scan_args(void);
/*:76*/
#line 67 "common.w"
/*:1*//*20:*/
#line 95 "common.w"
void
common_init(void)
{
/*45:*/
#line 605 "common.w"
name_dir->byte_start= byte_ptr= byte_mem;
name_ptr= name_dir+1;
name_ptr->byte_start= byte_mem;
root= NULL;
/*:45*/
#line 99 "common.w"
/*74:*/
#line 1137 "common.w"
show_banner= show_happiness= show_progress= make_xrefs= true;
/*:74*/
#line 100 "common.w"
/*84:*/
#line 1274 "common.w"
scan_args();
if(program==ctangle){
if((C_file= fopen(C_file_name,"wb"))==NULL)
fatal("! Cannot open output file ",C_file_name);
}
else{
if((tex_file= fopen(tex_file_name,"wb"))==NULL)
fatal("! Cannot open output file ",tex_file_name);
}
/*:84*/
#line 101 "common.w"
}
/*:20*//*23:*/
#line 156 "common.w"
static boolean input_ln(
FILE*fp)
{
int c= EOF;
char*k;
if(feof(fp))return false;
limit= k= buffer;
while(k<=buffer_end&&(c= getc(fp))!=EOF&&c!='\n')
if((*(k++)= c)!=' ')limit= k;
if(k> buffer_end){
while((c= getc(fp))!=EOF&&c!='\n');
loc= buffer;err_print("! Input line too long");
}
if(c==EOF&&limit==buffer)return false;
return true;
}
/*:23*//*27:*/
#line 227 "common.w"
static void
prime_the_change_buffer(void)
{
change_limit= change_buffer;
/*29:*/
#line 243 "common.w"
while(true){
change_line++;
if(!input_ln(change_file))return;
if(limit<buffer+2)continue;
if(buffer[0]!='@')continue;
if(xisupper(buffer[1]))buffer[1]= tolower((int)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");
}
}
/*:29*/
#line 232 "common.w"
/*30:*/
#line 260 "common.w"
do{
change_line++;
if(!input_ln(change_file)){
err_print("! Change file ended after @x");
return;
}
}while(limit==buffer);
/*:30*/
#line 233 "common.w"
/*31:*/
#line 270 "common.w"
change_limit= change_buffer+(ptrdiff_t)(limit-buffer);
strncpy(change_buffer,buffer,(size_t)(limit-buffer+1));
/*:31*/
#line 234 "common.w"
}
/*:27*//*32:*/
#line 296 "common.w"
static void
check_change(void)
{
int n= 0;
if(lines_dont_match)return;
change_pending= false;
if(!changed_section[section_count]){
if_section_start_make_pending(true);
if(!change_pending)changed_section[section_count]= true;
}
while(true){
changing= print_where= true;change_line++;
if(!input_ln(change_file)){
err_print("! Change file ended before @y");
change_limit= change_buffer;changing= false;
return;
}
if(limit> buffer+1&&buffer[0]=='@'){
if(xisupper(buffer[1]))buffer[1]= tolower((int)buffer[1]);
/*34:*/
#line 336 "common.w"
if(buffer[1]=='x'||buffer[1]=='z'){
loc= buffer+2;err_print("! Where is the matching @y?");
}
else if(buffer[1]=='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;
}
/*:34*/
#line 318 "common.w"
}
/*31:*/
#line 270 "common.w"
change_limit= change_buffer+(ptrdiff_t)(limit-buffer);
strncpy(change_buffer,buffer,(size_t)(limit-buffer+1));
/*:31*/
#line 320 "common.w"
changing= false;cur_line++;
while(!input_ln(cur_file)){
if(include_depth==0){
err_print("! CWEB file ended during a change");
input_has_ended= true;return;
}
include_depth--;cur_line++;
}
if(lines_dont_match)n++;
}
}
/*:32*//*35:*/
#line 362 "common.w"
boolean get_line(void)
{
restart:
if(changing&&include_depth==change_depth)
/*38:*/
#line 470 "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(false);
if(change_pending){
changed_section[section_count]= true;change_pending= false;
}
}
*limit= ' ';
if(buffer[0]=='@'){
if(xisupper(buffer[1]))buffer[1]= tolower((int)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= true;
}
}
}
}
/*:38*/
#line 367 "common.w"
if(!changing||include_depth> change_depth){
/*37:*/
#line 453 "common.w"
{
cur_line++;
while(!input_ln(cur_file)){
print_where= true;
if(include_depth==0){input_has_ended= true;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();
}
/*:37*/
#line 369 "common.w"
if(changing&&include_depth==change_depth)goto restart;
}
if(input_has_ended)return false;
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++;
/*36:*/
#line 407 "common.w"
{
char temp_file_name[max_file_name_length];
char*cur_file_name_end= cur_file_name+max_file_name_length-1;
char*kk,*k= cur_file_name;
size_t 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= true;
goto restart;
}
if((kk= getenv("CWEBINPUTS"))!=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
#line 435 "common.w"
l= 0;
#endif
#line 437 "common.w"
}
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= true;
goto restart;
}
}
include_depth--;err_print("! Cannot open include file");goto restart;
}
/*:36*/
#line 388 "common.w"
}
return true;
}
/*:35*//*39:*/
#line 502 "common.w"
void
check_complete(void){
if(change_limit!=change_buffer){
strncpy(buffer,change_buffer,(size_t)(change_limit-change_buffer+1));
limit= buffer+(ptrdiff_t)(change_limit-change_buffer);
changing= true;change_depth= include_depth;loc= buffer;
err_print("! Change file entry did not match");
}
}
/*:39*//*40:*/
#line 518 "common.w"
void
reset_input(void)
{
limit= buffer;loc= buffer+1;buffer[0]= ' ';
/*41:*/
#line 533 "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= true;
if((change_file= fopen(change_file_name,"r"))==NULL)
fatal("! Cannot open change file ",change_file_name);
/*:41*/
#line 523 "common.w"
include_depth= cur_line= change_line= 0;
change_depth= include_depth;
changing= true;prime_the_change_buffer();changing= !changing;
limit= buffer;loc= buffer+1;buffer[0]= ' ';input_has_ended= false;
}
/*:40*//*48:*/
#line 630 "common.w"
name_pointer
id_lookup(
const char*first,
const char*last,
eight_bits t)
{
const char*i= first;
int h;
size_t l;
name_pointer p;
if(last==NULL)for(last= first;*last!='\0';last++);
l= (size_t)(last-first);
/*49:*/
#line 653 "common.w"
h= (int)((eight_bits)*i);
while(++i<last)h= (h+h+(int)((eight_bits)*i))%hash_size;
/*:49*/
#line 643 "common.w"
/*50:*/
#line 661 "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;
}
/*:50*/
#line 644 "common.w"
if(p==name_ptr)/*51:*/
#line 672 "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)p->ilk= t,init_node(p);
}
/*:51*/
#line 645 "common.w"
return p;
}
/*:48*//*52:*/
#line 704 "common.w"
void
print_section_name(
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,q= NULL;
term_write(s,(size_t)(ss-s));
s= p->byte_start;
}
if(q)term_write("...",3);
}
/*:52*//*53:*/
#line 721 "common.w"
void
sprint_section_name(
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,(size_t)(ss-s)),dest+= ss-s;
s= p->byte_start;
}
*dest= '\0';
}
/*:53*//*54:*/
#line 739 "common.w"
void
print_prefix_name(
name_pointer p)
{
char*s= first_chunk(p);
size_t l= prefix_length(p);
term_write(s,l);
if(s+l<(p+1)->byte_start)term_write("...",3);
}
/*:54*//*56:*/
#line 765 "common.w"
static int web_strcmp(
char*j,
size_t j_len,
char*k,
size_t 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;
}
/*:56*//*57:*/
#line 794 "common.w"
static name_pointer
add_section_name(
name_pointer par,
int c,
char*first,
char*last,
boolean ispref)
{
name_pointer p= name_ptr;
char*s= first_chunk(p);
size_t name_len= (size_t)(last-first+(int)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= p->rlink= NULL;
init_node(p);
return par==NULL?(root= p):c==less?(par->llink= p):(par->rlink= p);
}
/*:57*//*58:*/
#line 822 "common.w"
static void
extend_section_name(
name_pointer p,
char*first,
char*last,
boolean ispref)
{
char*s;
name_pointer q= p+1;
size_t name_len= (size_t)(last-first+(int)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)= ' ';
}
/*:58*//*59:*/
#line 850 "common.w"
name_pointer
section_lookup(
char*first,char*last,
boolean ispref)
{
int c= less;
name_pointer p= root;
name_pointer q= NULL;
name_pointer r= NULL;
name_pointer par= NULL;
size_t name_len= (size_t)(last-first+1);
/*60:*/
#line 874 "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("%s","\n! Ambiguous prefix: matches <");
print_prefix_name(p);
printf("%s",">\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;
}
/*:60*/
#line 864 "common.w"
/*61:*/
#line 899 "common.w"
if(r==NULL)
return add_section_name(par,c,first,last+1,ispref);