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51728: assign pcre named capture groups to a hash

This commit is contained in:
Oliver Kiddle 2023-05-13 00:56:48 +02:00
parent b62e911341
commit f3f371deb3
4 changed files with 56 additions and 14 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2023-05-13 Oliver Kiddle <opk@zsh.org>
* 51728: Doc/Zsh/mod_pcre.yo, Src/Modules/pcre.c,
Test/V07pcre.ztst: assign pcre named capture groups to a hash
* 51723: Src/Modules/pcre.c, Test/V07pcre.ztst, configure.ac:
migrate pcre module to pcre2

10
Doc/Zsh/mod_pcre.yo
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@ -20,12 +20,12 @@ including those that indicate newline.
)
findex(pcre_study)
item(tt(pcre_study))(
Studies the previously-compiled PCRE which may result in faster
matching.
Requests JIT compilation for the previously-compiled PCRE which
may result in faster matching.
)
findex(pcre_match)
item(tt(pcre_match) [ tt(-v) var(var) ] [ tt(-a) var(arr) ] \
[ tt(-n) var(offset) ] [ tt(-b) ] var(string))(
[ tt(-A) var(assoc) ] [ tt(-n) var(offset) ] [ tt(-b) ] var(string))(
Returns successfully if tt(string) matches the previously-compiled
PCRE.
@ -36,7 +36,9 @@ substrings, unless the tt(-a) option is given, in which
case it will set the array var(arr). Similarly, the variable
tt(MATCH) will be set to the entire matched portion of the
string, unless the tt(-v) option is given, in which case the variable
var(var) will be set.
var(var) will be set. Furthermore, any named captures will
be stored in the associative array tt(.pcre.match) unless an
alternative is given with tt(-A).
No variables are altered if there is no successful match.
A tt(-n) option starts searching for a match from the
byte var(offset) position in var(string). If the tt(-b) option is given,

43
Src/Modules/pcre.c
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@ -129,14 +129,17 @@ bin_pcre_study(char *nam, UNUSED(char **args), UNUSED(Options ops), UNUSED(int f
}
static int
zpcre_get_substrings(char *arg, pcre2_match_data *mdata, int captured_count,
char *matchvar, char *substravar, int want_offset_pair,
int matchedinarr, int want_begin_end)
zpcre_get_substrings(pcre2_code *pat, char *arg, pcre2_match_data *mdata,
int captured_count, char *matchvar, char *substravar, char *namedassoc,
int want_offset_pair, int matchedinarr, int want_begin_end)
{
PCRE2_SIZE *ovec;
char *match_all, **matches;
char offset_all[50];
int capture_start = 1;
int vec_off;
PCRE2_SPTR ntable; /* table of named captures */
uint32_t ncount, nsize;
if (matchedinarr) {
/* bash-style ovec[0] entire-matched string in the array */
@ -174,7 +177,7 @@ zpcre_get_substrings(char *arg, pcre2_match_data *mdata, int captured_count,
if (substravar &&
(!want_begin_end || nelem)) {
char **x;
int vec_off, i;
int i;
matches = x = (char **) zalloc(sizeof(char *) * (captured_count+1-capture_start));
for (i = capture_start; i < captured_count; i++) {
vec_off = 2*i;
@ -184,6 +187,23 @@ zpcre_get_substrings(char *arg, pcre2_match_data *mdata, int captured_count,
setaparam(substravar, matches);
}
if (!pcre2_pattern_info(pat, PCRE2_INFO_NAMECOUNT, &ncount) && ncount
&& !pcre2_pattern_info(pat, PCRE2_INFO_NAMEENTRYSIZE, &nsize)
&& !pcre2_pattern_info(pat, PCRE2_INFO_NAMETABLE, &ntable))
{
char **hash, **hashptr;
uint32_t nidx;
hashptr = hash = (char **)zshcalloc((ncount+1)*2*sizeof(char *));
for (nidx = 0; nidx < ncount; nidx++) {
vec_off = (ntable[nsize * nidx] << 9) + 2 * ntable[nsize * nidx + 1];
/* would metafy the key but pcre limits characters in the name */
*hashptr++ = ztrdup((char *) ntable + nsize * nidx + 2);
*hashptr++ = metafy(arg + ovec[vec_off],
ovec[vec_off+1]-ovec[vec_off], META_DUP);
}
sethparam(namedassoc, hash);
}
if (want_begin_end) {
/*
* cond-infix rather than builtin; also not bash; so we set a bunch
@ -286,6 +306,7 @@ bin_pcre_match(char *nam, char **args, Options ops, UNUSED(int func))
char *matched_portion = NULL;
char *plaintext = NULL;
char *receptacle = NULL;
char *named = ".pcre.match";
int return_value = 1;
/* The subject length and offset start are both int values in pcre_exec */
int subject_len;
@ -305,6 +326,9 @@ bin_pcre_match(char *nam, char **args, Options ops, UNUSED(int func))
if(OPT_HASARG(ops,c='v')) {
matched_portion = OPT_ARG(ops,c);
}
if (OPT_HASARG(ops, c='A')) {
named = OPT_ARG(ops, c);
}
if(OPT_HASARG(ops,c='n')) { /* The offset position to start the search, in bytes. */
if ((offset_start = getposint(OPT_ARG(ops,c), nam)) < 0)
return 1;
@ -326,8 +350,8 @@ bin_pcre_match(char *nam, char **args, Options ops, UNUSED(int func))
if (ret==0) return_value = 0;
else if (ret == PCRE2_ERROR_NOMATCH) /* no match */;
else if (ret>0) {
zpcre_get_substrings(plaintext, pcre_mdata, ret, matched_portion, receptacle,
want_offset_pair, 0, 0);
zpcre_get_substrings(pcre_pattern, plaintext, pcre_mdata, ret, matched_portion,
receptacle, named, want_offset_pair, 0, 0);
return_value = 0;
}
else {
@ -405,9 +429,8 @@ cond_pcre_match(char **a, int id)
break;
}
else if (r>0) {
zpcre_get_substrings(lhstr_plain, pcre_mdata, r, svar, avar, 0,
isset(BASHREMATCH),
!isset(BASHREMATCH));
zpcre_get_substrings(pcre_pat, lhstr_plain, pcre_mdata, r, svar, avar,
".pcre.match", 0, isset(BASHREMATCH), !isset(BASHREMATCH));
return_value = 1;
break;
}
@ -443,7 +466,7 @@ static struct conddef cotab[] = {
static struct builtin bintab[] = {
BUILTIN("pcre_compile", 0, bin_pcre_compile, 1, 1, 0, "aimxs", NULL),
BUILTIN("pcre_match", 0, bin_pcre_match, 1, 1, 0, "a:v:n:b", NULL),
BUILTIN("pcre_match", 0, bin_pcre_match, 1, 1, 0, "A:a:v:n:b", NULL),
BUILTIN("pcre_study", 0, bin_pcre_study, 0, 0, 0, NULL, NULL)
};

14
Test/V07pcre.ztst
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@ -182,3 +182,17 @@
[[ abc =~ 'a(d*)bc' ]] && print "$#MATCH; $#match; ${#match[1]}"
0:empty capture
>3; 1; 0
[[ category/name-12345 =~ '(?x)^
(?<category> [^/]* ) /
(?<package>
(?<name> \w+ ) -
(?<version> \d+ ))$' ]]
typeset -p1 .pcre.match
0:named captures
>typeset -g -A .pcre.match=(
> [category]=category
> [name]=name
> [package]=name-12345
> [version]=12345
>)