// vhdl.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_VHDL_PARSER_H
#define OHCOUNT_VHDL_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *VHDL_LANG = LANG_VHDL;
// the languages entities
const char *vhdl_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
VHDL_SPACE = 0, VHDL_COMMENT, VHDL_STRING, VHDL_ANY
};
/*****************************************************************************/
%%{
machine vhdl;
write data;
include common "common.rl";
# Line counting machine
action vhdl_ccallback {
switch(entity) {
case VHDL_SPACE:
ls
break;
case VHDL_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(VHDL_LANG)
break;
case NEWLINE:
std_newline(VHDL_LANG)
}
}
vhdl_comment = '--' @comment nonnewline*;
vhdl_char = '\'' @code [^\r\n\f'] '\'';
vhdl_dq_str = '"' @code [^\r\n\f"]* '"';
vhdl_string = vhdl_char | vhdl_dq_str;
vhdl_line := |*
spaces ${ entity = VHDL_SPACE; } => vhdl_ccallback;
vhdl_comment;
vhdl_string;
newline ${ entity = NEWLINE; } => vhdl_ccallback;
^space ${ entity = VHDL_ANY; } => vhdl_ccallback;
*|;
# Entity machine
action vhdl_ecallback {
callback(VHDL_LANG, vhdl_entities[entity], cint(ts), cint(te), userdata);
}
vhdl_comment_entity = '--' nonnewline*;
vhdl_entity := |*
space+ ${ entity = VHDL_SPACE; } => vhdl_ecallback;
vhdl_comment_entity ${ entity = VHDL_COMMENT; } => vhdl_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with VHDL 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_vhdl(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) ? vhdl_en_vhdl_line : vhdl_en_vhdl_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(VHDL_LANG) }
}
#endif
/*****************************************************************************/