// mp_with_tex.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_MPTEX_PARSER_H
#define OHCOUNT_MPTEX_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *MPTEX_LANG = LANG_METAPOST;
// the languages entities
const char *mptex_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
MPTEX_SPACE = 0, MPTEX_COMMENT, MPTEX_STRING, MPTEX_ANY
};
/*****************************************************************************/
#include "tex.h"
%%{
machine mptex;
write data;
include common "common.rl";
#EMBED(tex)
# Line counting machine
action mptex_ccallback {
switch(entity) {
case MPTEX_SPACE:
ls
break;
case MPTEX_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(MPTEX_LANG)
break;
case NEWLINE:
std_newline(MPTEX_LANG)
break;
case CHECK_BLANK_ENTRY:
check_blank_entry(MPTEX_LANG)
}
}
mptex_comment = '%' @{ fhold; } @comment nonnewline*;
mptex_string = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
mptex_tex_entry = ('verbatimtex' | 'btex') @code;
mptex_tex_outry = 'etex' @check_blank_outry @code;
mptex_tex_line := |*
mptex_tex_outry @{ p = ts; fret; };
# unmodified Tex patterns
spaces ${ entity = TEX_SPACE; } => tex_ccallback;
tex_comment;
newline ${ entity = NEWLINE; } => tex_ccallback;
^space ${ entity = TEX_ANY; } => tex_ccallback;
*|;
mptex_line := |*
mptex_tex_entry @{ entity = CHECK_BLANK_ENTRY; } @mptex_ccallback
@{ saw(TEX_LANG); } => { fcall mptex_tex_line; };
# standard Metapost patterns
spaces ${ entity = MPTEX_SPACE; } => mptex_ccallback;
mptex_comment;
mptex_string;
newline ${ entity = NEWLINE; } => mptex_ccallback;
^space ${ entity = MPTEX_ANY; } => mptex_ccallback;
*|;
# Entity machine
action mptex_ecallback {
callback(MPTEX_LANG, mptex_entities[entity], cint(ts), cint(te), userdata);
}
mptex_tex_entry_entity = 'verbatimtex' | 'btex';
mptex_tex_outry_entity = 'etex';
mptex_tex_entity := |*
mptex_tex_outry_entity @{ fret; };
# unmodified Tex patterns
space+ ${ entity = TEX_SPACE; } => tex_ecallback;
tex_comment_entity ${ entity = TEX_COMMENT; } => tex_ecallback;
# TODO:
^space;
*|;
mptex_comment_entity = '%' nonnewline*;
mptex_entity := |*
# TODO: mptex_ecallback for mptex_*_{entry,outry}_entity
mptex_tex_entry_entity => { fcall mptex_tex_entity; };
# standard mptex patterns
space+ ${ entity = MPTEX_SPACE; } => mptex_ecallback;
mptex_comment_entity ${ entity = MPTEX_COMMENT; } => mptex_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Metapost code.
*
* @param *buffer The string to parse.
* @param length The length of the string to parse.
* @param count Integer flag specifying whether or not to count lines. If yes,
* uses the Ragel machine optimized for counting. Otherwise uses the Ragel
* machine optimized for returning entity positions.
* @param *callback Callback function. If count is set, callback is called for
* every line of code, comment, or blank with 'lcode', 'lcomment', and
* 'lblank' respectively. Otherwise callback is called for each entity found.
*/
void parse_mptex(char *buffer, int length, int count,
void (*callback) (const char *lang, const char *entity, int s,
int e, void *udata),
void *userdata
) {
init
%% write init;
cs = (count) ? mptex_en_mptex_line : mptex_en_mptex_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(MPTEX_LANG) }
}
#endif
/*****************************************************************************/