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Diffstat (limited to 'Build/source/texk/web2c/cwebdir/common.c')
-rw-r--r--Build/source/texk/web2c/cwebdir/common.c1327
1 files changed, 1327 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/cwebdir/common.c b/Build/source/texk/web2c/cwebdir/common.c
new file mode 100644
index 00000000000..7dd0f0c0838
--- /dev/null
+++ b/Build/source/texk/web2c/cwebdir/common.c
@@ -0,0 +1,1327 @@
+/*1:*/
+#line 66 "common.w"
+
+/*3:*/
+#line 46 "common.h"
+
+#include <ctype.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+/*:3*/
+#line 67 "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 xisalpha(c) (isalpha((eight_bits) c) &&((eight_bits) c<0200) )
+#define xisdigit(c) (isdigit((eight_bits) c) &&((eight_bits) c<0200) )
+#define xisspace(c) (isspace((eight_bits) c) &&((eight_bits) c<0200) )
+#define xislower(c) (islower((eight_bits) c) &&((eight_bits) c<0200) )
+#define xisupper(c) (isupper((eight_bits) c) &&((eight_bits) c<0200) )
+#define xisxdigit(c) (isxdigit((eight_bits) c) &&((eight_bits) c<0200) ) \
+
+#define max_include_depth 10 \
+
+#define max_file_name_length 1024
+#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 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 make_xrefs flags['x'] \
+
+#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) \
+
+#define max_bytes 1000000 \
+
+#define max_toks 1000000
+#define max_names 10239 \
+
+#define max_sections 4000
+#define max_texts 10239
+#define longest_name 10000
+#define stack_size 500
+#define buf_size 1000
+#define long_buf_size (buf_size+longest_name) \
+
+#define lines_dont_match (change_limit-change_buffer!=limit-buffer|| \
+strncmp(buffer,change_buffer,(size_t) (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 too_long() {include_depth--; \
+err_print("! Include file name too long") ;goto restart;} \
+
+#define hash_size 8501 \
+
+#define first_chunk(p) ((p) ->byte_start+2)
+#define prefix_length(p) (int) ((eight_bits) *((p) ->byte_start) *256+ \
+(eight_bits) *((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 flag_change (**argv!='-')
+
+#line 68 "common.w"
+
+/*2:*/
+#line 37 "common.h"
+
+typedef bool boolean;
+typedef uint8_t eight_bits;
+typedef uint16_t sixteen_bits;
+extern boolean program;
+extern int phase;
+
+/*:2*//*4:*/
+#line 74 "common.h"
+
+extern char section_text[];
+extern char*section_text_end;
+extern char*id_first;
+extern char*id_loc;
+
+/*:4*//*5:*/
+#line 88 "common.h"
+
+extern char buffer[];
+extern char*buffer_end;
+extern char*loc;
+extern char*limit;
+
+/*:5*//*6:*/
+#line 105 "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;
+
+/*:6*//*8:*/
+#line 125 "common.h"
+
+extern sixteen_bits section_count;
+extern boolean changed_section[];
+extern boolean change_pending;
+extern boolean print_where;
+
+/*:8*//*9:*/
+#line 139 "common.h"
+
+typedef struct name_info{
+char*byte_start;
+struct name_info*link;
+union{
+struct name_info*Rlink;
+
+char 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 h;
+
+/*:9*//*11:*/
+#line 183 "common.h"
+
+extern int history;
+
+/*:11*//*13:*/
+#line 199 "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[];
+
+/*:13*//*14:*/
+#line 215 "common.h"
+
+extern FILE*C_file;
+extern FILE*tex_file;
+extern FILE*idx_file;
+extern FILE*scn_file;
+extern FILE*active_file;
+
+/*:14*/
+#line 69 "common.w"
+
+/*18:*/
+#line 83 "common.w"
+
+boolean program;
+
+/*:18*//*19:*/
+#line 92 "common.w"
+
+int phase;
+
+/*:19*//*21:*/
+#line 130 "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 150 "common.w"
+
+char buffer[long_buf_size];
+char*buffer_end= buffer+buf_size-2;
+char*loc= buffer;
+char*limit= buffer;
+
+/*:22*//*25:*/
+#line 194 "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 220 "common.w"
+
+static char change_buffer[buf_size];
+static char*change_limit;
+
+/*:26*//*37:*/
+#line 399 "common.w"
+
+sixteen_bits section_count;
+boolean changed_section[max_sections];
+boolean change_pending;
+
+boolean print_where= false;
+
+/*:37*//*43:*/
+#line 596 "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 607 "common.w"
+
+char*byte_ptr;
+name_pointer name_ptr;
+
+/*:44*//*46:*/
+#line 627 "common.w"
+
+name_pointer hash[hash_size];
+hash_pointer hash_end= hash+hash_size-1;
+hash_pointer h;
+
+/*:46*//*65:*/
+#line 1014 "common.w"
+
+int history= spotless;
+
+/*:65*//*73:*/
+#line 1135 "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 1282 "common.w"
+
+FILE*C_file;
+FILE*tex_file;
+FILE*idx_file;
+FILE*scn_file;
+FILE*active_file;
+
+/*:83*/
+#line 70 "common.w"
+
+/*7:*/
+#line 119 "common.h"
+
+extern boolean get_line(void);
+extern void check_complete(void);
+extern void reset_input(void);
+
+/*:7*//*10:*/
+#line 162 "common.h"
+
+extern boolean names_match(name_pointer,const char*,size_t,eight_bits);
+extern name_pointer id_lookup(const char*,const char*,char);
+
+extern name_pointer section_lookup(char*,char*,int);
+extern void init_node(name_pointer);
+extern void init_p(name_pointer,eight_bits);
+extern void print_prefix_name(name_pointer);
+extern void print_section_name(name_pointer);
+extern void sprint_section_name(char*,name_pointer);
+
+/*:10*//*12:*/
+#line 186 "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*);
+
+/*:12*//*15:*/
+#line 223 "common.h"
+
+extern void common_init(void);
+extern void print_stats(void);
+
+/*:15*//*24:*/
+#line 180 "common.w"
+static boolean input_ln(FILE*);
+
+/*:24*//*28:*/
+#line 241 "common.w"
+static void prime_the_change_buffer(void);
+
+/*:28*//*33:*/
+#line 340 "common.w"
+static void check_change(void);
+
+/*:33*//*55:*/
+#line 774 "common.w"
+
+static int web_strcmp(char*,int,char*,int);
+static name_pointer add_section_name(name_pointer,int,char*,char*,int);
+static void extend_section_name(name_pointer,char*,char*,int);
+
+/*:55*//*64:*/
+#line 1002 "common.w"
+static int section_name_cmp(char**,int,name_pointer);
+
+/*:64*//*76:*/
+#line 1197 "common.w"
+static void scan_args(void);
+
+/*:76*/
+#line 71 "common.w"
+
+
+/*:1*//*20:*/
+#line 99 "common.w"
+
+void
+common_init(void)
+{
+/*45:*/
+#line 611 "common.w"
+
+name_dir->byte_start= byte_ptr= byte_mem;
+name_ptr= name_dir+1;
+name_ptr->byte_start= byte_mem;
+root= NULL;
+
+/*:45*//*47:*/
+#line 634 "common.w"
+
+for(h= hash;h<=hash_end;*h++= NULL);
+
+/*:47*/
+#line 103 "common.w"
+
+/*74:*/
+#line 1148 "common.w"
+
+show_banner= show_happiness= show_progress= make_xrefs= true;
+show_stats= false;
+
+/*:74*/
+#line 104 "common.w"
+
+/*84:*/
+#line 1289 "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 105 "common.w"
+
+}
+
+/*:20*//*23:*/
+#line 160 "common.w"
+
+static boolean input_ln(
+FILE*fp)
+{
+register int c= EOF;
+register 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)
+if((c= getc(fp))!=EOF&&c!='\n'){
+ungetc(c,fp);loc= buffer;err_print("! Input line too long");
+
+}
+if(c==EOF&&limit==buffer)return false;
+
+return true;
+}
+
+/*:23*//*27:*/
+#line 231 "common.w"
+
+static void
+prime_the_change_buffer(void)
+{
+change_limit= change_buffer;
+/*29:*/
+#line 247 "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((eight_bits)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 236 "common.w"
+
+/*30:*/
+#line 264 "common.w"
+
+do{
+change_line++;
+if(!input_ln(change_file)){
+err_print("! Change file ended after @x");
+
+return;
+}
+}while(limit==buffer);
+
+/*:30*/
+#line 237 "common.w"
+
+/*31:*/
+#line 274 "common.w"
+
+{
+change_limit= change_buffer+(ptrdiff_t)(limit-buffer);
+strncpy(change_buffer,buffer,(size_t)(limit-buffer+1));
+}
+
+/*:31*/
+#line 238 "common.w"
+
+}
+
+/*:27*//*32:*/
+#line 302 "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= true;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]=='@'){
+char xyz_code= xisupper(buffer[1])?tolower((eight_bits)buffer[1]):buffer[1];
+/*34:*/
+#line 342 "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;
+}
+
+/*:34*/
+#line 324 "common.w"
+
+}
+/*31:*/
+#line 274 "common.w"
+
+{
+change_limit= change_buffer+(ptrdiff_t)(limit-buffer);
+strncpy(change_buffer,buffer,(size_t)(limit-buffer+1));
+}
+
+/*:31*/
+#line 326 "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"
+
+void
+reset_input(void)
+{
+limit= buffer;loc= buffer+1;buffer[0]= ' ';
+/*36:*/
+#line 377 "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);
+
+/*:36*/
+#line 367 "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= false;
+}
+
+/*:35*//*38:*/
+#line 406 "common.w"
+
+boolean get_line(void)
+{
+restart:
+if(changing&&include_depth==change_depth)
+/*41:*/
+#line 514 "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((eight_bits)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;
+}
+}
+}
+}
+
+/*:41*/
+#line 411 "common.w"
+
+if(!changing||include_depth> change_depth){
+/*40:*/
+#line 497 "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();
+}
+
+/*:40*/
+#line 413 "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++;
+/*39:*/
+#line 451 "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= true;
+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= true;
+goto restart;
+}
+}
+include_depth--;err_print("! Cannot open include file");goto restart;
+}
+
+/*:39*/
+#line 432 "common.w"
+
+}
+return true;
+}
+
+/*:38*//*42:*/
+#line 546 "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");
+
+}
+}
+
+/*:42*//*48:*/
+#line 639 "common.w"
+
+name_pointer
+id_lookup(
+const char*first,
+const char*last,
+char t)
+{
+const char*i= first;
+int h;
+int l;
+name_pointer p;
+if(last==NULL)for(last= first;*last!='\0';last++);
+l= (int)(last-first);
+/*49:*/
+#line 662 "common.w"
+
+h= (eight_bits)*i;
+while(++i<last)h= (h+h+(int)((eight_bits)*i))%hash_size;
+
+
+/*:49*/
+#line 652 "common.w"
+
+/*50:*/
+#line 670 "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 653 "common.w"
+
+if(p==name_ptr)/*51:*/
+#line 681 "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;
+init_p(p,t);
+}
+
+/*:51*/
+#line 654 "common.w"
+
+return p;
+}
+
+/*:48*//*52:*/
+#line 713 "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){
+term_write(s,(size_t)(ss-s));p= q->link;q= p;
+}else{
+term_write(s,(size_t)(ss+1-s));p= name_dir;q= NULL;
+}
+s= p->byte_start;
+}
+if(q)term_write("...",3);
+}
+
+/*:52*//*53:*/
+#line 732 "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 753 "common.w"
+
+void
+print_prefix_name(
+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);
+}
+
+/*:54*//*56:*/
+#line 779 "common.w"
+
+static int web_strcmp(
+char*j,
+int j_len,
+char*k,
+int 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 808 "common.w"
+
+static name_pointer
+add_section_name(
+name_pointer par,
+int c,
+char*first,
+char*last,
+int ispref)
+{
+name_pointer p= name_ptr;
+char*s= first_chunk(p);
+int name_len= (int)(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);
+}
+
+/*:57*//*58:*/
+#line 837 "common.w"
+
+static void
+extend_section_name(
+name_pointer p,
+char*first,
+char*last,
+int ispref)
+{
+char*s;
+name_pointer q= p+1;
+int name_len= (int)(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)= ' ';
+}
+
+/*:58*//*59:*/
+#line 865 "common.w"
+
+name_pointer
+section_lookup(
+char*first,char*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= (int)(last-first)+1;
+/*60:*/
+#line 889 "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){
+fputs("\n! Ambiguous prefix: matches <",stdout);
+
+print_prefix_name(p);
+fputs(">\n and <",stdout);
+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 879 "common.w"
+
+/*61:*/
+#line 914 "common.w"
+
+if(r==NULL)
+return add_section_name(par,c,first,last+1,ispref);
+
+/*:61*/
+#line 880 "common.w"
+
+/*62:*/
+#line 922 "common.w"
+
+switch(section_name_cmp(&first,name_len,r)){
+
+case prefix:
+if(!ispref){
+fputs("\n! New name is a prefix of <",stdout);
+
+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:
+fputs("\n! New name extends <",stdout);
+
+print_section_name(r);
+err_print(">");
+return r;
+default:
+fputs("\n! Section name incompatible with <",stdout);
+
+print_prefix_name(r);
+fputs(">,\n which abbreviates <",stdout);
+print_section_name(r);
+err_print(">");
+return r;
+}
+
+/*:62*/
+#line 881 "common.w"
+
+}
+
+/*:59*//*63:*/
+#line 970 "common.w"
+
+static int section_name_cmp(
+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(true){
+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+(ptrdiff_t)(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-= (int)(ss-s);s= q->byte_start;r= q;continue;}
+*pfirst= first;return extension;
+default:return c;
+}
+}
+}
+
+/*:63*//*66:*/
+#line 1024 "common.w"
+
+void
+err_print(
+const char*s)
+{
+char*k,*l;
+printf(*s=='!'?"\n%s":"%s",s);
+if(web_file_open)/*67:*/
+#line 1044 "common.w"
+
+{if(changing&&include_depth==change_depth)
+printf(". (l. %d of change file)\n",change_line);
+else if(include_depth==0)printf(". (l. %d)\n",cur_line);
+else printf(". (l. %d of include file %s)\n",cur_line,cur_file_name);
+l= (loc>=limit?limit:loc);
+if(l> buffer){
+for(k= buffer;k<l;k++)
+if(*k=='\t')putchar(' ');
+else putchar(*k);
+putchar('\n');
+for(k= buffer;k<l;k++)putchar(' ');
+}
+for(k= l;k<limit;k++)putchar(*k);
+if(*limit=='|')putchar('|');
+putchar(' ');
+}
+
+/*:67*/
+#line 1031 "common.w"
+
+update_terminal;mark_error;
+}
+
+/*:66*//*68:*/
+#line 1076 "common.w"
+
+int wrap_up(void){
+if(show_progress)new_line;
+if(show_stats)
+print_stats();
+/*69:*/
+#line 1086 "common.w"
+
+switch(history){
+case spotless:if(show_happiness)puts("(No errors were found.)");break;
+case harmless_message:
+puts("(Did you see the warning message above?)");break;
+case error_message:
+puts("(Pardon me, but I think I spotted something wrong.)");break;
+case fatal_message:puts("(That was a fatal error, my friend.)");
+}
+
+/*:69*/
+#line 1081 "common.w"
+
+if(history> harmless_message)return EXIT_FAILURE;
+else return EXIT_SUCCESS;
+}
+
+/*:68*//*70:*/
+#line 1102 "common.w"
+void
+fatal(
+const char*s,const char*t)
+{
+if(*s)err_print(s);
+err_print(t);
+history= fatal_message;exit(wrap_up());
+}
+
+/*:70*//*71:*/
+#line 1113 "common.w"
+void
+overflow(
+const char*t)
+{
+printf("\n! Sorry, %s capacity exceeded",t);fatal("","");
+}
+
+
+/*:71*//*75:*/
+#line 1167 "common.w"
+
+static void
+scan_args(void)
+{
+char*dot_pos;
+char*name_pos;
+register char*s;
+boolean found_web= false,found_change= false,found_out= false;
+
+
+strcpy(change_file_name,"/dev/null");
+while(--argc> 0){
+if((**(++argv)=='-'||**argv=='+')&&*(*argv+1))/*80:*/
+#line 1258 "common.w"
+
+{
+for(dot_pos= *argv+1;*dot_pos> '\0';dot_pos++)
+flags[(eight_bits)*dot_pos]= flag_change;
+}
+
+/*:80*/
+#line 1179 "common.w"
+
+else{
+s= name_pos= *argv;dot_pos= NULL;
+while(*s){
+if(*s=='.')dot_pos= s++;
+else if(*s=='/')dot_pos= NULL,name_pos= ++s;
+else s++;
+}
+if(!found_web)/*77:*/
+#line 1206 "common.w"
+
+{
+if(s-*argv> max_file_name_length-5)
+/*82:*/
+#line 1276 "common.w"
+fatal("! Filename too long\n",*argv);
+
+
+/*:82*/
+#line 1209 "common.w"
+
+if(dot_pos==NULL)
+sprintf(web_file_name,"%s.w",*argv);
+else{
+strcpy(web_file_name,*argv);
+*dot_pos= 0;
+}
+sprintf(alt_web_file_name,"%s.web",*argv);
+sprintf(tex_file_name,"%s.tex",name_pos);
+sprintf(idx_file_name,"%s.idx",name_pos);
+sprintf(scn_file_name,"%s.scn",name_pos);
+sprintf(C_file_name,"%s.c",name_pos);
+found_web= true;
+}
+
+/*:77*/
+#line 1188 "common.w"
+
+else if(!found_change)/*78:*/
+#line 1224 "common.w"
+
+{
+if(strcmp(*argv,"-")!=0){
+if(s-*argv> max_file_name_length-4)
+/*82:*/
+#line 1276 "common.w"
+fatal("! Filename too long\n",*argv);
+
+
+/*:82*/
+#line 1228 "common.w"
+
+if(dot_pos==NULL)
+sprintf(change_file_name,"%s.ch",*argv);
+else strcpy(change_file_name,*argv);
+}
+found_change= true;
+}
+
+/*:78*/
+#line 1189 "common.w"
+
+else if(!found_out)/*79:*/
+#line 1236 "common.w"
+
+{
+if(s-*argv> max_file_name_length-5)
+/*82:*/
+#line 1276 "common.w"
+fatal("! Filename too long\n",*argv);
+
+
+/*:82*/
+#line 1239 "common.w"
+
+if(dot_pos==NULL){
+sprintf(tex_file_name,"%s.tex",*argv);
+sprintf(idx_file_name,"%s.idx",*argv);
+sprintf(scn_file_name,"%s.scn",*argv);
+sprintf(C_file_name,"%s.c",*argv);
+}else{
+strcpy(tex_file_name,*argv);
+strcpy(C_file_name,*argv);
+if(make_xrefs){
+*dot_pos= 0;
+sprintf(idx_file_name,"%s.idx",*argv);
+sprintf(scn_file_name,"%s.scn",*argv);
+}
+}
+found_out= true;
+}
+
+/*:79*/
+#line 1190 "common.w"
+
+else/*81:*/
+#line 1264 "common.w"
+
+{
+if(program==ctangle)
+fatal(
+"! Usage: ctangle [options] webfile[.w] [{changefile[.ch]|-} [outfile[.c]]]\n"
+,"");
+
+else fatal(
+"! Usage: cweave [options] webfile[.w] [{changefile[.ch]|-} [outfile[.tex]]]\n"
+,"");
+}
+
+/*:81*/
+#line 1191 "common.w"
+
+}
+}
+if(!found_web)/*81:*/
+#line 1264 "common.w"
+
+{
+if(program==ctangle)
+fatal(
+"! Usage: ctangle [options] webfile[.w] [{changefile[.ch]|-} [outfile[.c]]]\n"
+,"");
+
+else fatal(
+"! Usage: cweave [options] webfile[.w] [{changefile[.ch]|-} [outfile[.tex]]]\n"
+,"");
+}
+
+/*:81*/
+#line 1194 "common.w"
+
+}
+
+/*:75*/