// awk.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net
/************************* Required for every parser *************************/
#ifndef OHCOUNT_AWK_PARSER_H
#define OHCOUNT_AWK_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *AWK_LANG = LANG_AWK;
// the languages entities
const char *awk_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
AWK_SPACE = 0, AWK_COMMENT, AWK_STRING, AWK_ANY
};
/*****************************************************************************/
%%{
machine awk;
write data;
include common "common.rl";
# Line counting machine
action awk_ccallback {
switch(entity) {
case AWK_SPACE:
ls
break;
case AWK_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(AWK_LANG)
break;
case NEWLINE:
std_newline(AWK_LANG)
}
}
awk_comment = '#' @comment nonnewline*;
awk_dq_str = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
awk_regex = '/' @code ([^\r\n\f/\\] | '\\' nonnewline)* '/';
awk_string = awk_dq_str | awk_regex;
awk_line := |*
spaces ${ entity = AWK_SPACE; } => awk_ccallback;
awk_comment;
awk_string;
newline ${ entity = NEWLINE; } => awk_ccallback;
^space ${ entity = AWK_ANY; } => awk_ccallback;
*|;
# Entity machine
action awk_ecallback {
callback(AWK_LANG, awk_entities[entity], cint(ts), cint(te), userdata);
}
awk_comment_entity = '#' nonnewline*;
awk_entity := |*
space+ ${ entity = AWK_SPACE; } => awk_ecallback;
awk_comment_entity ${ entity = AWK_COMMENT; } => awk_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Awk 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_awk(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) ? awk_en_awk_line : awk_en_awk_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(AWK_LANG) }
}
#endif
/*****************************************************************************/