// pascal.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net
/************************* Required for every parser *************************/
#ifndef OHCOUNT_PASCAL_PARSER_H
#define OHCOUNT_PASCAL_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *PASCAL_LANG = LANG_PASCAL;
// the languages entities
const char *pascal_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
PASCAL_SPACE = 0, PASCAL_COMMENT, PASCAL_STRING, PASCAL_ANY
};
/*****************************************************************************/
%%{
machine pascal;
write data;
include common "common.rl";
# Line counting machine
action pascal_ccallback {
switch(entity) {
case PASCAL_SPACE:
ls
break;
case PASCAL_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(PASCAL_LANG)
break;
case NEWLINE:
std_newline(PASCAL_LANG)
}
}
pascal_line_comment = '//' @comment nonnewline*;
pascal_old_block_comment =
'(*' @comment (
newline %{ entity = INTERNAL_NL; } %pascal_ccallback
|
ws
|
(nonnewline - ws) @code
)* :>> '*)';
pascal_turbo_block_comment =
'{' @comment (
newline %{ entity = INTERNAL_NL; } %pascal_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '}';
pascal_comment = pascal_line_comment | pascal_old_block_comment |
pascal_turbo_block_comment;
pascal_string =
'\'' @code (
newline %{ entity = INTERNAL_NL; } %pascal_ccallback
|
ws
|
[^\r\n\f\t '\\] @code
|
'\\' nonnewline @code
)* '\'';
pascal_line := |*
spaces ${ entity = PASCAL_SPACE; } => pascal_ccallback;
pascal_comment;
pascal_string;
newline ${ entity = NEWLINE; } => pascal_ccallback;
^space ${ entity = PASCAL_ANY; } => pascal_ccallback;
*|;
# Entity machine
action pascal_ecallback {
callback(PASCAL_LANG, pascal_entities[entity], cint(ts), cint(te),
userdata);
}
pascal_line_comment_entity = '//' nonnewline*;
pascal_old_block_comment_entity = '(*' any* :>> '*)';
pascal_turbo_block_comment_entity = '{' any* :>> '}';
pascal_comment_entity = pascal_line_comment_entity |
pascal_old_block_comment_entity | pascal_turbo_block_comment_entity;
pascal_entity := |*
space+ ${ entity = PASCAL_SPACE; } => pascal_ecallback;
pascal_comment_entity ${ entity = PASCAL_COMMENT; } => pascal_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Pascal 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_pascal(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) ? pascal_en_pascal_line : pascal_en_pascal_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(PASCAL_LANG) }
}
#endif
/*****************************************************************************/