1 // dcl.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net
3 /************************* Required for every parser *************************/
4 #ifndef OHCOUNT_DCL_PARSER_H
5 #define OHCOUNT_DCL_PARSER_H
7 #include "../parser_macros.h"
9 // the name of the language
10 const char *DCL_LANG = LANG_DCL;
12 // the languages entities
13 const char *dcl_entities[] = {
14 "space", "line_start", "comment", "string", "any"
17 // constants associated with the entities
19 DCL_SPACE = 0, DCL_LINE_START, DCL_COMMENT, DCL_STRING, DCL_ANY
22 /*****************************************************************************/
27 include common "common.rl";
29 # Line counting machine
31 action dcl_ccallback {
41 std_internal_newline(DCL_LANG)
48 dcl_comment = '!' @comment nonnewline*;
50 dcl_string = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
53 '$' ${ entity = DCL_LINE_START; } => dcl_ccallback;
54 spaces ${ entity = DCL_SPACE; } => dcl_ccallback;
57 newline ${ entity = NEWLINE; } => dcl_ccallback;
58 ^(space | '$') ${ entity = DCL_ANY; } => dcl_ccallback;
63 action dcl_ecallback {
64 callback(DCL_LANG, dcl_entities[entity], cint(ts), cint(te), userdata);
67 dcl_comment_entity = '!' nonnewline*;
70 space+ ${ entity = DCL_SPACE; } => dcl_ecallback;
71 dcl_comment_entity ${ entity = DCL_COMMENT; } => dcl_ecallback;
77 /************************* Required for every parser *************************/
79 /* Parses a string buffer with DCL code.
81 * @param *buffer The string to parse.
82 * @param length The length of the string to parse.
83 * @param count Integer flag specifying whether or not to count lines. If yes,
84 * uses the Ragel machine optimized for counting. Otherwise uses the Ragel
85 * machine optimized for returning entity positions.
86 * @param *callback Callback function. If count is set, callback is called for
87 * every line of code, comment, or blank with 'lcode', 'lcomment', and
88 * 'lblank' respectively. Otherwise callback is called for each entity found.
90 void parse_dcl(char *buffer, int length, int count,
91 void (*callback) (const char *lang, const char *entity, int s,
98 cs = (count) ? dcl_en_dcl_line : dcl_en_dcl_entity;
101 // if no newline at EOF; callback contents of last line
102 if (count) { process_last_line(DCL_LANG) }
107 /*****************************************************************************/