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