/************************* Required for every parser *************************/
#ifndef OHCOUNT_STRUCTURED_BASIC_PARSER_H
#define OHCOUNT_STRUCTURED_BASIC_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *SB_LANG = LANG_STRUCTURED_BASIC;
// the languages entities
const char *sb_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
SB_SPACE = 0, SB_COMMENT, SB_STRING, SB_ANY,
};
/*****************************************************************************/
%%{
machine structured_basic;
write data;
include common "common.rl";
# Line counting machine
action sb_ccallback {
switch(entity) {
case SB_SPACE:
ls
break;
case SB_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(SB_LANG)
break;
case NEWLINE:
std_newline(SB_LANG)
}
}
sb_comment = ('\'' | /rem/i) @comment nonnewline*;
sb_string = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
sb_line := |*
spaces ${ entity = SB_SPACE; } => sb_ccallback;
sb_comment;
sb_string;
newline ${ entity = NEWLINE; } => sb_ccallback;
^space ${ entity = SB_ANY; } => sb_ccallback;
*|;
# Entity machine
action sb_ecallback {
callback(SB_LANG, sb_entities[entity], cint(ts), cint(te), userdata);
}
sb_comment_entity = ('\'' | /rem/i) nonnewline*;
sb_entity := |*
space+ ${ entity = SB_SPACE; } => sb_ecallback;
sb_comment_entity ${ entity = SB_COMMENT; } => sb_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Structured BASIC 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_structured_basic(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) ? structured_basic_en_sb_line : structured_basic_en_sb_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(SB_LANG) }
}
#endif
/*****************************************************************************/