// rexx.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_REXX_PARSER_H
#define OHCOUNT_REXX_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *REXX_LANG = LANG_REXX;
// the languages entities
const char *rexx_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
REXX_SPACE = 0, REXX_COMMENT, REXX_STRING, REXX_ANY
};
/*****************************************************************************/
%%{
machine rexx;
write data;
include common "common.rl";
# Line counting machine
action rexx_ccallback {
switch(entity) {
case REXX_SPACE:
ls
break;
case REXX_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(REXX_LANG)
break;
case NEWLINE:
std_newline(REXX_LANG)
}
}
action rexx_comment_nc_res { nest_count = 0; }
action rexx_comment_nc_inc { nest_count++; }
action rexx_comment_nc_dec { nest_count--; }
rexx_comment =
'/*' >rexx_comment_nc_res @comment (
newline %{ entity = INTERNAL_NL; } %rexx_ccallback
|
ws
|
'/*' @rexx_comment_nc_inc @comment
|
'*/' @rexx_comment_nc_dec @comment
|
^space @comment
)* :>> ('*/' when { nest_count == 0 }) @comment;
rexx_sq_str = '\'' @code ([^\r\n\f'\\] | '\\' nonnewline)* '\'';
rexx_dq_str = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
rexx_string = rexx_sq_str | rexx_dq_str;
rexx_line := |*
spaces ${ entity = REXX_SPACE; } => rexx_ccallback;
rexx_comment;
rexx_string;
newline ${ entity = NEWLINE; } => rexx_ccallback;
^space ${ entity = REXX_ANY; } => rexx_ccallback;
*|;
# Entity machine
action rexx_ecallback {
callback(REXX_LANG, rexx_entities[entity], cint(ts), cint(te), userdata);
}
rexx_comment_entity = '/*' >rexx_comment_nc_res (
'/*' @rexx_comment_nc_inc
|
'*/' @rexx_comment_nc_dec
|
any
)* :>> ('*/' when { nest_count == 0 });
rexx_entity := |*
space+ ${ entity = REXX_SPACE; } => rexx_ecallback;
rexx_comment_entity ${ entity = REXX_COMMENT; } => rexx_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Pike 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_rexx(char *buffer, int length, int count,
void (*callback) (const char *lang, const char *entity, int s,
int e, void *udata),
void *userdata
) {
init
int nest_count = 0;
%% write init;
cs = (count) ? rexx_en_rexx_line : rexx_en_rexx_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(REXX_LANG) }
}
#endif
/*****************************************************************************/