// tex.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_TEX_PARSER_H
#define OHCOUNT_TEX_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *TEX_LANG = LANG_TEX;
// the languages entities
const char *tex_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
TEX_SPACE = 0, TEX_COMMENT, TEX_STRING, TEX_ANY
};
/*****************************************************************************/
%%{
machine tex;
write data;
include common "common.rl";
# Line counting machine
action tex_ccallback {
switch(entity) {
case TEX_SPACE:
ls
break;
case TEX_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(TEX_LANG)
break;
case NEWLINE:
std_newline(TEX_LANG)
}
}
tex_comment = '%' @comment nonnewline*;
tex_line := |*
spaces ${ entity = TEX_SPACE; } => tex_ccallback;
tex_comment;
newline ${ entity = NEWLINE; } => tex_ccallback;
^space ${ entity = TEX_ANY; } => tex_ccallback;
*|;
# Entity machine
action tex_ecallback {
callback(TEX_LANG, tex_entities[entity], cint(ts), cint(te), userdata);
}
tex_comment_entity = '%' nonnewline*;
tex_entity := |*
space+ ${ entity = TEX_SPACE; } => tex_ecallback;
tex_comment_entity ${ entity = TEX_COMMENT; } => tex_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Tex markup.
*
* @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_tex(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) ? tex_en_tex_line : tex_en_tex_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(TEX_LANG) }
}
#endif
/*****************************************************************************/