/*
* j2t.lex : An example of the use (possibly abuse!)
* of start states.
*/
%{
#define MAX_STATES 1024
#define TRUE 1
#define FALSE 0
#define CHAPTER "@chapter"
#define SECTION "@section"
#define SSECTION "@subsection"
#define SSSECTION "@subsubsection"
int states[MAX_STATES];
int statep = 0;
int need_closing = FALSE;
char buffer[YY_BUF_SIZE];
extern char *yytext;
/*
* set up the head of the *.texinfo file the program
* will produce. This is a standard texinfo header.
*/
void print_header(void)
{
printf("\\input texinfo @c -*-texinfo-*-\n");
printf("@c %c**start of header\n",'%');
printf("@setfilename jargon.info\n");
printf("@settitle The New Hackers Dictionary\n");
printf("@synindex fn cp\n");
printf("@synindex vr cp\n");
printf("@c %c**end of header\n",'%');
printf("@setchapternewpage odd\n");
printf("@finalout\n");
printf("@c @smallbook\n");
printf("\n");
printf("@c ==========================================================\n\n");
printf("@c This file was produced by j2t. Any mistakes are *not* the\n");
printf("@c fault of the jargon file editors. \n");
printf("@c ==========================================================\n\n");
printf("@titlepage\n");
printf("@title The New Hackers Dictionary\n");
printf("@subtitle Version 2.9.10\n");
printf("@subtitle Generated by j2t\n");
printf("@author Eric S. Raymond, Guy L. Steel, Mark Crispin et al.\n");
printf("@end titlepage\n");
printf("@page\n");
printf("\n@c ==========================================================\n");
printf("\n\n");
printf("@unnumbered Preface\n");
printf("@c *******\n");
}
/*
* create the tail of the texinfo file produced.
*/
void print_trailer(void)
{
printf("\n@c ==========================================================\n");
printf("@contents\n"); /* print the table of contents */
printf("@bye\n\n");
}
/*
* write an underline under a section
* or chapter so we can find it later.
*/
void write_underline(int len, int space, char ch)
{
int loop;
printf("@c ");
for(loop=3; loop<space; loop++){
printf(" ");
}
while(len--){
printf("%c",ch);
}
printf("\n\n");
}
/*
* check for texinfo special characters
* and escape them
*/
char *check_and_convert(char *string)
{
int buffpos = 0;
int len,loop;
len = strlen(string);
for(loop=0; loop<len; loop++){
if(string[loop] == '@' || string[loop] == '{' || string[loop] == '}'){
buffer[buffpos++] = '@';
buffer[buffpos++] = string[loop];
} else {
buffer[buffpos++] = string[loop];
}
}
buffer[buffpos] = '\0';
return(buffer);
}
/*
* write out a chapter,section, or subsection
* header
*/
void write_block_header(char *type)
{
int loop;
int len;
(void)check_and_convert(yytext);
len = strlen(buffer);
for(loop=0; buffer[loop] != '\n';loop++)
;
buffer[loop] = '\0';
printf("%s %s\n",type,buffer);
write_underline(strlen(buffer),strlen(type)+1,'*');
}
%}
/*
* the flex description starts here
*/
%x HEADING EXAMPLE ENUM EXAMPLE2
%x BITEM BITEM_ITEM
%s LITEM LITEM2
%%
^#[^#]*"#" /* skip the header & trailer */
/* chapters have asterisks under them
* and are terminated by a colon
*/
^[^\n:]+\n[*]+\n write_block_header(CHAPTER);
^"= "[A-Z]" ="\n"="* { /* we create a seciton for each category */
if(need_closing == TRUE){
printf("@end table\n\n\n");
}
need_closing = TRUE;
write_block_header(SECTION);
printf("\n\n@table @b\n");
}
"Examples:"[^\.]+ ECHO;
"*"[^*\n]+"*" { /* @emph{}(emphasized) text */
yytext[yyleng-1] = '\0';
(void)check_and_convert(&yytext[1]);
printf("@i{%s}",buffer);
}
"{{"[^}]+"}}" { /* special emphasis */
yytext[yyleng-2] = '\0';
(void)check_and_convert(&yytext[2]);
printf("@b{%s}",buffer);
}
"{"[^}]+"}" { /* special emphasis */
yytext[yyleng-1] = '\0';
(void)check_and_convert(&yytext[1]);
printf("@b{%s}",buffer);
}
/* escape some special texinfo characters */
<INITIAL,LITEM,LITEM2,BITEM,ENUM,EXAMPLE,EXAMPLE2>"@" printf("@@");
<INITIAL,LITEM,LITEM2,BITEM,ENUM,EXAMPLE,EXAMPLE2>"{" printf("@{");
<INITIAL,LITEM,LITEM2,BITEM,ENUM,EXAMPLE,EXAMPLE2>"}" printf("@}");
/*
* reproduce @example code
*/
":"\n+[^\n0-9*]+\n" "[^ ] {
int loop;
int len;
int cnt;
printf(":\n\n@example \n");
strcpy(buffer,yytext);
len = strlen(buffer);
cnt = 0;
for(loop=len; loop > 0;loop--){
if(buffer[loop] == '\n')
cnt++;
if(cnt == 2)
break;
}
yyless(loop+1);
statep++;
states[statep] = EXAMPLE2;
BEGIN(EXAMPLE2);
}
<EXAMPLE,EXAMPLE2>^\n {
printf("@end example\n\n");
statep--;
BEGIN(states[statep]);
}
/*
* repoduce @enumerate lists
*/
":"\n+[ \t]*[0-9]+"." {
int loop;
int len;
printf(":\n\n@enumerate \n");
strcpy(buffer,yytext);
len = strlen(buffer);
for(loop=len; loop > 0;loop--){
if(buffer[loop] == '\n')
break;
}
yyless(loop);
statep++;
states[statep] = ENUM;
BEGIN(ENUM);
}
<ENUM>"@" printf("@@");
<ENUM>":"\n+" "[^0-9] {
printf(":\n\n@example\n");
statep++;
states[statep] = EXAMPLE;
BEGIN(EXAMPLE);
}
<ENUM>\n[ \t]+[0-9]+"." {
printf("\n\n@item ");
}
<ENUM>^[^ ] |
<ENUM>\n\n\n[ \t]+[^0-9] {
printf("\n\n@end enumerate\n\n");
statep--;
BEGIN(states[statep]);
}
/*
* reproduce one kind of @itemize list
*/
":"\n+":" {
int loop;
int len;
printf(":\n\n@itemize @bullet \n");
yyless(2);
statep++;
states[statep] = LITEM2;
BEGIN(LITEM2);
}
<LITEM2>^":".+":" {
(void)check_and_convert(&yytext[1]);
buffer[strlen(buffer)-1]='\0';
printf("@item @b{%s:}\n",buffer);
}
<LITEM2>\n\n\n+[^:\n] {
printf("\n\n@end itemize\n\n");
ECHO;
statep--;
BEGIN(states[statep]);
}
/*
* create a list out of the revision history part.
* We need the "Version" for this because it
* clashes with other rules otherwise.
*/
:[\n]+"Version"[^:\n*]+":" {
int loop;
int len;
printf(":\n\n@itemize @bullet \n");
strcpy(buffer,yytext);
len = strlen(buffer);
for(loop=len; loop > 0;loop--){
if(buffer[loop] == '\n')
break;
}
yyless(loop);
statep++;
states[statep] = LITEM;
BEGIN(LITEM);
}
<LITEM>^.+":" {
(void)check_and_convert(yytext);
buffer[strlen(buffer)-1]='\0';
printf("@item @b{%s}\n\n",buffer);
}
<LITEM>^[^:\n]+\n\n[^:\n]+\n {
int loop;
strcpy(buffer,yytext);
for(loop=0; buffer[loop] != '\n'; loop++);
buffer[loop] = '\0';
printf("%s\n",buffer);
printf("@end itemize\n\n");
printf("%s",&buffer[loop+1]);
statep--;
BEGIN(states[statep]);
}
/*
* reproduce @itemize @bullet lists
*/
":"\n[ ]*"*" {
int loop;
int len;
printf(":\n\n@itemize @bullet \n");
len = strlen(buffer);
for(loop=0; loop < len;loop++){
if(buffer[loop] == '\n')
break;
}
yyless((len-loop)+2);
statep++;
states[statep] = BITEM;
BEGIN(BITEM);
}
<BITEM>^" "*"*" {
printf("@item");
statep++;
states[statep] = BITEM_ITEM;
BEGIN(BITEM_ITEM);
}
<BITEM>"@" printf("@@");
<BITEM>^\n {
printf("@end itemize\n\n");
statep--;
BEGIN(states[statep]);
}
<BITEM_ITEM>[^\:]* {
printf(" @b{%s}\n\n",check_and_convert(yytext));
}
<BITEM_ITEM>":" {
statep--;
BEGIN(states[statep]);
}
/*
* recreate @chapter, @section etc.
*/
^:[^:]* {
(void)check_and_convert(&yytext[1]);
statep++;
states[statep] = HEADING;
BEGIN(HEADING);
}
<HEADING>:[^\n] {
printf("@item @b{%s}\n",buffer);
write_underline(strlen(buffer),6,'~');
statep--;
BEGIN(states[statep]);
}
<HEADING>:\n"*"* {
if(need_closing == TRUE){
printf("@end table\n\n\n");
need_closing = FALSE;
}
printf("@chapter %s\n",buffer);
write_underline(strlen(buffer),9,'*');
statep--;
BEGIN(states[statep]);
}
<HEADING>:\n"="* {
if(need_closing == TRUE){
printf("@end table\n\n\n");
need_closing = FALSE;
}
printf("@section %s\n",buffer);
write_underline(strlen(buffer),9,'=');
statep--;
BEGIN(states[statep]);
}
<HEADING>"@" printf("@@");
<HEADING>:\n"-"* {
if(need_closing == TRUE){
printf("@end table\n\n\n");
need_closing = FALSE;
}
printf("@subsection %s\n",buffer);
write_underline(strlen(buffer),12,'-');
statep--;
BEGIN(states[statep]);
}
/*
* recreate @example text
*/
^" " {
printf("@example\n");
statep++;
states[statep] = EXAMPLE;
BEGIN(EXAMPLE);
}
<EXAMPLE>^" "
. ECHO;
%%
/*
* initialise and go.
*/
int main(int argc, char *argv[])
{
states[0] = INITIAL;
statep = 0;
print_header();
yylex();
print_trailer();
return(0);
}