// sql.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_SQL_PARSER_H
#define OHCOUNT_SQL_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *SQL_LANG = LANG_SQL;
// the languages entities
const char *sql_entities[] = {
"space", "comment", "string", "any",
};
// constants associated with the entities
enum {
SQL_SPACE = 0, SQL_COMMENT, SQL_STRING, SQL_ANY
};
/*****************************************************************************/
%%{
machine sql;
write data;
include common "common.rl";
# Line counting machine
action sql_ccallback {
switch(entity) {
case SQL_SPACE:
ls
break;
case SQL_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(SQL_LANG)
break;
case NEWLINE:
std_newline(SQL_LANG)
}
}
sql_line_comment = ('--' | '#' | '//') @comment nonnewline*;
sql_c_block_comment =
'/*' @comment (
newline %{ entity = INTERNAL_NL; } %sql_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '*/';
sql_block_comment =
'{' @comment (
newline %{ entity = INTERNAL_NL; } %sql_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '}';
sql_comment = sql_line_comment | sql_c_block_comment | sql_block_comment;
sql_sq_str = '\'' @code ([^\r\n\f'\\] | '\\' nonnewline)* '\'';
sql_dq_str = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
sql_string = sql_sq_str | sql_dq_str;
sql_line := |*
spaces ${ entity = SQL_SPACE; } => sql_ccallback;
sql_comment;
sql_string;
newline ${ entity = NEWLINE; } => sql_ccallback;
^space ${ entity = SQL_ANY; } => sql_ccallback;
*|;
# Entity machine
action sql_ecallback {
callback(SQL_LANG, sql_entities[entity], cint(ts), cint(te), userdata);
}
sql_line_comment_entity = ('--' | '#' | '//') nonnewline*;
sql_c_block_comment_entity = '/*' any* :>> '*/';
sql_block_comment_entity = '{' any* :>> '}';
sql_comment_entity = sql_line_comment_entity | sql_c_block_comment_entity |
sql_block_comment_entity;
sql_entity := |*
space+ ${ entity = SQL_SPACE; } => sql_ecallback;
sql_comment_entity ${ entity = SQL_COMMENT; } => sql_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with SQL 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_sql(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) ? sql_en_sql_line : sql_en_sql_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(SQL_LANG) }
}
#endif
/*****************************************************************************/