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|
(* Test bindings for Perl-compatible Regular Expressions.
* Copyright (C) 2017 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*)
open Printf
let compile ?(anchored = false) ?(caseless = false)
?(dotall = false) ?(extended = false) ?(multiline = false)
patt =
eprintf "PCRE.compile%s%s%s%s%s %s\n%!"
(if anchored then " ~anchored:true" else "")
(if caseless then " ~caseless:true" else "")
(if dotall then " ~dotall:true" else "")
(if extended then " ~extended:true" else "")
(if multiline then " ~multiline:true" else "")
patt;
PCRE.compile ~anchored ~caseless ~dotall ~extended ~multiline patt
let matches ?(offset = 0) re str =
eprintf "PCRE.matches %s, %d ->%!" str offset;
let r = PCRE.matches ~offset re str in
eprintf " %b\n%!" r;
r
let replace ?(global = false) patt subst subj =
eprintf "PCRE.replace global:%b <patt> %s %s ->%!" global subst subj;
let r = PCRE.replace ~global patt subst subj in
eprintf " %s\n%!" r;
r
let split patt subj =
eprintf "PCRE.split <patt> %s ->%!" subj;
let s1, s2 = PCRE.split patt subj in
eprintf " (%s, %s)\n%!" s1 s2;
(s1, s2)
let nsplit ?(max = 0) patt subj =
eprintf "PCRE.nsplit%s <patt> %s ->%!"
(if max = 0 then "" else sprintf " ~max:%d" max)
subj;
let ss = PCRE.nsplit ~max patt subj in
eprintf " [%s]\n%!" (String.concat "; " ss);
ss
let sub i =
eprintf "PCRE.sub %d ->%!" i;
let r = PCRE.sub i in
eprintf " %s\n%!" r;
r
let subi i =
eprintf "PCRE.subi %d ->%!" i;
let i1, i2 = PCRE.subi i in
eprintf " (%d, %d)\n%!" i1 i2;
(i1, i2)
let () =
try
let re0 = compile "a+b" in
let re1 = compile "(a+)b" in
let re2 = compile "(a+)(b*)" in
let re3 = compile ~caseless:true "[^a-z0-9_]" in
let ws = compile "\\s+" in
assert (matches re0 "ccaaabbbb" = true);
assert (sub 0 = "aaab");
assert (matches re0 "aaa" = false);
assert (matches re0 "xyz" = false);
assert (matches re0 "aaabc" = true);
assert (sub 0 = "aaab");
assert (matches re1 "ccaaabb" = true);
assert (sub 1 = "aaa");
assert (sub 0 = "aaab");
assert (matches re2 "ccabbc" = true);
assert (sub 1 = "a");
assert (sub 2 = "bb");
assert (sub 0 = "abb");
assert (matches re2 "ccac" = true);
assert (sub 1 = "a");
assert (sub 2 = "");
assert (sub 0 = "a");
assert (subi 0 = (2, 3));
assert (subi 1 = (2, 3));
assert (subi 2 = (3, 3));
assert (matches ~offset:5 re0 "aaabcabc" = true);
assert (sub 0 = "ab");
assert (matches ~offset:5 re0 "aaabcbaac" = false);
assert (replace re0 "dd" "abcabcaabccca" = "ddcabcaabccca");
assert (replace ~global:true re0 "dd" "abcabcaabccca" = "ddcddcddccca");
(* This example copies a usage from customize/firstboot.ml
* "\xc2\xa3" is utf-8 for the GBP sign. Ideally PCRE would
* recognize that this is a single character, however doing that
* would involve passing the PCRE_UTF8 flag when compiling
* patterns, and that could be problematic if PCRE was built
* without Unicode support (XXX).
*)
assert (replace ~global:true re3 "-" "this is a\xc2\xa3FUNNY.name?"
(* = "this-is-a-FUNNY-name-" if UTF-8 worked *)
= "this-is-a--FUNNY-name-");
(* This also tests PCRE.split since that is used by nsplit. *)
assert (nsplit ~max:1 ws "a b c" = [ "a b c" ]);
assert (nsplit ~max:2 ws "a b c" = [ "a"; "b c" ]);
assert (nsplit ~max:3 ws "a b c" = [ "a"; "b"; "c" ]);
assert (nsplit ~max:10 ws "a b c" = [ "a"; "b"; "c" ]);
assert (nsplit ws "the cat sat on \t\t the mat." =
[ "the"; "cat"; "sat"; "on"; "the"; "mat." ]);
assert (nsplit ~max:5 ws "the cat sat on \t\t the mat." =
[ "the"; "cat"; "sat"; "on"; "the mat." ]);
assert (nsplit ws " the " = [ ""; "the"; "" ]);
assert (nsplit ws "the " = [ "the"; "" ]);
assert (nsplit ws " the" = [ ""; "the" ]);
assert (nsplit ws " \t the" = [ ""; "the" ]);
with
| Not_found ->
failwith "one of the PCRE.sub functions unexpectedly raised Not_found"
| PCRE.Error (msg, code) ->
failwith (sprintf "PCRE error: %s (PCRE error code %d)" msg code)
(* Run some out of range [sub] and [subi] calls to ensure an exception
* is thrown.
*)
let () =
let re2 = compile "(a+)(b*)" in
ignore (matches re2 "ccac");
(try ignore (sub 3) with Not_found -> ());
(try ignore (sub (-1)) with Invalid_argument _ -> ());
(try ignore (subi 3) with Not_found -> ());
(try ignore (subi (-1)) with Invalid_argument _ -> ())
(* Compile some bad regexps and check that an exception is thrown.
* It would be nice to check the error message is right but
* that involves dealing with language and future changes of
* PCRE error codes.
*)
let () =
List.iter (
fun patt ->
let msg, code =
try ignore (PCRE.compile patt); assert false
with PCRE.Error (m, c) -> m, c in
eprintf "patt: %s -> exception: %s (%d)\n%!" patt msg code
) [ "("; ")"; "+"; "*"; "(abc" ]
let () = Gc.compact ()
|
