1 (* Copyright (C) 2000, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
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15 * GNU General Public License for more details.
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19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
33 * conversione di un pattern
35 let rec patterneval p =
39 let h = match head with
40 MQBC s -> Str.global_replace (Str.regexp "\.") "\\\\\." s
46 h ^ (patterneval tail)
52 | MQFC i :: tail -> "/" ^ (string_of_int i) ^ (fieval tail)
53 | MQFS :: tail -> "[^/]*" ^ (fieval tail)
54 | MQFSS :: tail -> ".*" ^ (fieval tail)
58 * conversione di un fragment identifier
64 "#xpointer\\\\(1" ^ fieval fi ^ "\\\\)"
70 * 20/05/2002: non piu' necessario: l'estensione fa eventualmente
71 * parte del pattern precedente
89 * trasforma un pattern MathQL in un pattern postgresql
91 * si utilizzano espressioni regolari POSIX anziche' l'operatore
92 * SQL standard LIKE perche' MathQL prevede esperssioni con "*"
95 let pattern_match (preamble, pattern, fragid) =
96 " ~ '^" ^ (preeval preamble) ^ ":/" ^ (patterneval pattern) ^ (fieval fragid) ^ "$'"