1 // metafont.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
3 /************************* Required for every parser *************************/
4 #ifndef OHCOUNT_METAFONT_PARSER_H
5 #define OHCOUNT_METAFONT_PARSER_H
7 #include "../parser_macros.h"
9 // the name of the language
10 const char *METAFONT_LANG = LANG_METAFONT;
12 // the languages entities
13 const char *metafont_entities[] = {
14 "space", "comment", "string", "any",
17 // constants associated with the entities
19 METAFONT_SPACE = 0, METAFONT_COMMENT, METAFONT_STRING, METAFONT_ANY
22 /*****************************************************************************/
27 include common "common.rl";
29 # Line counting machine
31 action metafont_ccallback {
40 std_internal_newline(METAFONT_LANG)
43 std_newline(METAFONT_LANG)
47 metafont_comment = '%' @{ fhold; } @comment nonnewline*;
49 metafont_string = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
52 spaces ${ entity = METAFONT_SPACE; } => metafont_ccallback;
55 newline ${ entity = NEWLINE; } => metafont_ccallback;
56 ^space ${ entity = METAFONT_ANY; } => metafont_ccallback;
61 action metafont_ecallback {
62 callback(METAFONT_LANG, metafont_entities[entity], cint(ts), cint(te),
66 metafont_comment_entity = '%' nonnewline*;
69 space+ ${ entity = METAFONT_SPACE; } => metafont_ecallback;
70 metafont_comment_entity ${ entity = METAFONT_COMMENT; } => metafont_ecallback;
76 /************************* Required for every parser *************************/
78 /* Parses a string buffer with Metafont code.
80 * @param *buffer The string to parse.
81 * @param length The length of the string to parse.
82 * @param count Integer flag specifying whether or not to count lines. If yes,
83 * uses the Ragel machine optimized for counting. Otherwise uses the Ragel
84 * machine optimized for returning entity positions.
85 * @param *callback Callback function. If count is set, callback is called for
86 * every line of code, comment, or blank with 'lcode', 'lcomment', and
87 * 'lblank' respectively. Otherwise callback is called for each entity found.
89 void parse_metafont(char *buffer, int length, int count,
90 void (*callback) (const char *lang, const char *entity,
91 int s, int e, void *udata),
97 cs = (count) ? metafont_en_metafont_line : metafont_en_metafont_entity;
100 // if no newline at EOF; callback contents of last line
101 if (count) { process_last_line(METAFONT_LANG) }
106 /*****************************************************************************/