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From b62e911341c8ec7446378b477c47da4256053dc0 Mon Sep 17 00:00:00 2001
From: Oliver Kiddle <opk@zsh.org>
Date: Sat, 13 May 2023 00:53:32 +0200
Subject: [PATCH] 51723: migrate pcre module to pcre2
---
ChangeLog | 3 +
Src/Modules/pcre.c | 223 ++++++++++++++++++---------------------------
Test/V07pcre.ztst | 13 ++-
configure.ac | 20 ++--
4 files changed, 110 insertions(+), 149 deletions(-)
# diff --git a/ChangeLog b/ChangeLog
# index f5c77f801..285b73b2c 100644
# --- a/ChangeLog
# +++ b/ChangeLog
# @@ -1,5 +1,8 @@
# 2023-05-13 Oliver Kiddle <opk@zsh.org>
# + * 51723: Src/Modules/pcre.c, Test/V07pcre.ztst, configure.ac:
# + migrate pcre module to pcre2
# +
# * Felipe Contreras: 50612: Misc/vcs_info-examples: fix typo
# * github #98: Vidhan Bhatt: Completion/Darwin/Command/_shortcuts:
--- a/Src/Modules/pcre.c
+++ b/Src/Modules/pcre.c
@@ -34,11 +34,11 @@
#define CPCRE_PLAIN 0
/**/
-#if defined(HAVE_PCRE_COMPILE) && defined(HAVE_PCRE_EXEC)
-#include <pcre.h>
+#if defined(HAVE_PCRE2_COMPILE_8) && defined(HAVE_PCRE2_H)
+#define PCRE2_CODE_UNIT_WIDTH 8
+#include <pcre2.h>
-static pcre *pcre_pattern;
-static pcre_extra *pcre_hints;
+static pcre2_code *pcre_pattern;
/**/
static int
@@ -54,8 +54,8 @@ zpcre_utf8_enabled(void)
return 0;
if ((have_utf8_pcre == -1) &&
- (pcre_config(PCRE_CONFIG_UTF8, &have_utf8_pcre))) {
- have_utf8_pcre = -2; /* erk, failed to ask */
+ (pcre2_config(PCRE2_CONFIG_UNICODE, &have_utf8_pcre))) {
+ have_utf8_pcre = -2; /* erk, failed to ask */
}
return (have_utf8_pcre == 1) && (!strcmp(nl_langinfo(CODESET), "UTF-8"));
@@ -69,47 +69,38 @@ zpcre_utf8_enabled(void)
static int
bin_pcre_compile(char *nam, char **args, Options ops, UNUSED(int func))
{
- int pcre_opts = 0, pcre_errptr, target_len;
- const char *pcre_error;
+ uint32_t pcre_opts = 0;
+ int target_len;
+ int pcre_error;
+ PCRE2_SIZE pcre_offset;
char *target;
- if(OPT_ISSET(ops,'a')) pcre_opts |= PCRE_ANCHORED;
- if(OPT_ISSET(ops,'i')) pcre_opts |= PCRE_CASELESS;
- if(OPT_ISSET(ops,'m')) pcre_opts |= PCRE_MULTILINE;
- if(OPT_ISSET(ops,'x')) pcre_opts |= PCRE_EXTENDED;
- if(OPT_ISSET(ops,'s')) pcre_opts |= PCRE_DOTALL;
+ if (OPT_ISSET(ops, 'a')) pcre_opts |= PCRE2_ANCHORED;
+ if (OPT_ISSET(ops, 'i')) pcre_opts |= PCRE2_CASELESS;
+ if (OPT_ISSET(ops, 'm')) pcre_opts |= PCRE2_MULTILINE;
+ if (OPT_ISSET(ops, 'x')) pcre_opts |= PCRE2_EXTENDED;
+ if (OPT_ISSET(ops, 's')) pcre_opts |= PCRE2_DOTALL;
if (zpcre_utf8_enabled())
- pcre_opts |= PCRE_UTF8;
-
-#ifdef HAVE_PCRE_STUDY
- if (pcre_hints)
-#ifdef PCRE_CONFIG_JIT
- pcre_free_study(pcre_hints);
-#else
- pcre_free(pcre_hints);
-#endif
- pcre_hints = NULL;
-#endif
+ pcre_opts |= PCRE2_UTF;
if (pcre_pattern)
- pcre_free(pcre_pattern);
+ pcre2_code_free(pcre_pattern);
pcre_pattern = NULL;
target = ztrdup(*args);
unmetafy(target, &target_len);
- if ((int)strlen(target) != target_len) {
- zwarnnam(nam, "embedded NULs in PCRE pattern terminate pattern");
- }
-
- pcre_pattern = pcre_compile(target, pcre_opts, &pcre_error, &pcre_errptr, NULL);
+ pcre_pattern = pcre2_compile((PCRE2_SPTR) target, (PCRE2_SIZE) target_len,
+ pcre_opts, &pcre_error, &pcre_offset, NULL);
free(target);
if (pcre_pattern == NULL)
{
- zwarnnam(nam, "error in regex: %s", pcre_error);
+ PCRE2_UCHAR buffer[256];
+ pcre2_get_error_message(pcre_error, buffer, sizeof(buffer));
+ zwarnnam(nam, "error in regex: %s", buffer);
return 1;
}
@@ -117,67 +108,48 @@ bin_pcre_compile(char *nam, char **args,
}
/**/
-#ifdef HAVE_PCRE_STUDY
-
-/**/
static int
bin_pcre_study(char *nam, UNUSED(char **args), UNUSED(Options ops), UNUSED(int func))
{
- const char *pcre_error;
-
if (pcre_pattern == NULL)
{
zwarnnam(nam, "no pattern has been compiled for study");
return 1;
}
-
- if (pcre_hints)
-#ifdef PCRE_CONFIG_JIT
- pcre_free_study(pcre_hints);
-#else
- pcre_free(pcre_hints);
-#endif
- pcre_hints = NULL;
- pcre_hints = pcre_study(pcre_pattern, 0, &pcre_error);
- if (pcre_error != NULL)
- {
- zwarnnam(nam, "error while studying regex: %s", pcre_error);
- return 1;
+ int jit = 0;
+ if (!pcre2_config(PCRE2_CONFIG_JIT, &jit) && jit) {
+ if (pcre2_jit_compile(pcre_pattern, PCRE2_JIT_COMPLETE) < 0) {
+ zwarnnam(nam, "error while studying regex");
+ return 1;
+ }
}
return 0;
}
-/**/
-#else /* !HAVE_PCRE_STUDY */
-
-# define bin_pcre_study bin_notavail
-
-/**/
-#endif /* !HAVE_PCRE_STUDY */
-
-/**/
static int
-zpcre_get_substrings(char *arg, int *ovec, int captured_count, char *matchvar,
- char *substravar, int want_offset_pair, int matchedinarr,
- int want_begin_end)
+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)
{
- char **captures, *match_all, **matches;
+ PCRE2_SIZE *ovec;
+ char *match_all, **matches;
char offset_all[50];
int capture_start = 1;
if (matchedinarr) {
- /* bash-style captures[0] entire-matched string in the array */
+ /* bash-style ovec[0] entire-matched string in the array */
capture_start = 0;
}
- /* captures[0] will be entire matched string, [1] first substring */
- if (!pcre_get_substring_list(arg, ovec, captured_count, (const char ***)&captures)) {
- int nelem = arrlen(captures)-1;
+ /* ovec[0] will be entire matched string, [1] first substring */
+ ovec = pcre2_get_ovector_pointer(mdata);
+ if (ovec) {
+ int nelem = captured_count - 1;
/* Set to the offsets of the complete match */
if (want_offset_pair) {
- sprintf(offset_all, "%d %d", ovec[0], ovec[1]);
+ sprintf(offset_all, "%ld %ld", ovec[0], ovec[1]);
setsparam("ZPCRE_OP", ztrdup(offset_all));
}
/*
@@ -186,7 +158,7 @@ zpcre_get_substrings(char *arg, int *ove
* ovec is length 2*(1+capture_list_length)
*/
if (matchvar) {
- match_all = metafy(captures[0], ovec[1] - ovec[0], META_DUP);
+ match_all = metafy(arg + ovec[0], ovec[1] - ovec[0], META_DUP);
setsparam(matchvar, match_all);
}
/*
@@ -201,16 +173,12 @@ zpcre_get_substrings(char *arg, int *ove
*/
if (substravar &&
(!want_begin_end || nelem)) {
- char **x, **y;
+ char **x;
int vec_off, i;
- y = &captures[capture_start];
matches = x = (char **) zalloc(sizeof(char *) * (captured_count+1-capture_start));
- for (i = capture_start; i < captured_count; i++, y++) {
+ for (i = capture_start; i < captured_count; i++) {
vec_off = 2*i;
- if (*y)
- *x++ = metafy(*y, ovec[vec_off+1]-ovec[vec_off], META_DUP);
- else
- *x++ = NULL;
+ *x++ = metafy(arg + ovec[vec_off], ovec[vec_off+1]-ovec[vec_off], META_DUP);
}
*x = NULL;
setaparam(substravar, matches);
@@ -247,7 +215,8 @@ zpcre_get_substrings(char *arg, int *ove
setiparam("MEND", offs + !isset(KSHARRAYS) - 1);
if (nelem) {
char **mbegin, **mend, **bptr, **eptr;
- int i, *ipair;
+ int i;
+ size_t *ipair;
bptr = mbegin = zalloc(sizeof(char*)*(nelem+1));
eptr = mend = zalloc(sizeof(char*)*(nelem+1));
@@ -287,8 +256,6 @@ zpcre_get_substrings(char *arg, int *ove
setaparam("mend", mend);
}
}
-
- pcre_free_substring_list((const char **)captures);
}
return 0;
@@ -314,7 +281,8 @@ getposint(char *instr, char *nam)
static int
bin_pcre_match(char *nam, char **args, Options ops, UNUSED(int func))
{
- int ret, capcount, *ovec, ovecsize, c;
+ int ret, c;
+ pcre2_match_data *pcre_mdata = NULL;
char *matched_portion = NULL;
char *plaintext = NULL;
char *receptacle = NULL;
@@ -344,36 +312,30 @@ bin_pcre_match(char *nam, char **args, O
/* For the entire match, 'Return' the offset byte positions instead of the matched string */
if(OPT_ISSET(ops,'b')) want_offset_pair = 1;
- if ((ret = pcre_fullinfo(pcre_pattern, pcre_hints, PCRE_INFO_CAPTURECOUNT, &capcount)))
- {
- zwarnnam(nam, "error %d in fullinfo", ret);
- return 1;
- }
-
- ovecsize = (capcount+1)*3;
- ovec = zalloc(ovecsize*sizeof(int));
-
plaintext = ztrdup(*args);
unmetafy(plaintext, &subject_len);
if (offset_start > 0 && offset_start >= subject_len)
- ret = PCRE_ERROR_NOMATCH;
- else
- ret = pcre_exec(pcre_pattern, pcre_hints, plaintext, subject_len, offset_start, 0, ovec, ovecsize);
+ ret = PCRE2_ERROR_NOMATCH;
+ else {
+ pcre_mdata = pcre2_match_data_create_from_pattern(pcre_pattern, NULL);
+ ret = pcre2_match(pcre_pattern, (PCRE2_SPTR) plaintext, subject_len,
+ offset_start, 0, pcre_mdata, NULL);
+ }
if (ret==0) return_value = 0;
- else if (ret==PCRE_ERROR_NOMATCH) /* no match */;
+ else if (ret == PCRE2_ERROR_NOMATCH) /* no match */;
else if (ret>0) {
- zpcre_get_substrings(plaintext, ovec, ret, matched_portion, receptacle,
+ zpcre_get_substrings(plaintext, pcre_mdata, ret, matched_portion, receptacle,
want_offset_pair, 0, 0);
return_value = 0;
}
else {
- zwarnnam(nam, "error in pcre_exec [%d]", ret);
+ zwarnnam(nam, "error in pcre2_match [%d]", ret);
}
- if (ovec)
- zfree(ovec, ovecsize*sizeof(int));
+ if (pcre_mdata)
+ pcre2_match_data_free(pcre_mdata);
zsfree(plaintext);
return return_value;
@@ -383,17 +345,19 @@ bin_pcre_match(char *nam, char **args, O
static int
cond_pcre_match(char **a, int id)
{
- pcre *pcre_pat;
- const char *pcre_err;
+ pcre2_code *pcre_pat = NULL;
+ int pcre_err;
+ PCRE2_SIZE pcre_erroff;
char *lhstr, *rhre, *lhstr_plain, *rhre_plain, *avar, *svar;
- int r = 0, pcre_opts = 0, pcre_errptr, capcnt, *ov, ovsize;
+ int r = 0, pcre_opts = 0;
+ pcre2_match_data *pcre_mdata = NULL;
int lhstr_plain_len, rhre_plain_len;
int return_value = 0;
if (zpcre_utf8_enabled())
- pcre_opts |= PCRE_UTF8;
+ pcre_opts |= PCRE2_UTF;
if (isset(REMATCHPCRE) && !isset(CASEMATCH))
- pcre_opts |= PCRE_CASELESS;
+ pcre_opts |= PCRE2_CASELESS;
lhstr = cond_str(a,0,0);
rhre = cond_str(a,1,0);
@@ -401,9 +365,6 @@ cond_pcre_match(char **a, int id)
rhre_plain = ztrdup(rhre);
unmetafy(lhstr_plain, &lhstr_plain_len);
unmetafy(rhre_plain, &rhre_plain_len);
- pcre_pat = NULL;
- ov = NULL;
- ovsize = 0;
if (isset(BASHREMATCH)) {
svar = NULL;
@@ -415,27 +376,27 @@ cond_pcre_match(char **a, int id)
switch(id) {
case CPCRE_PLAIN:
- if ((int)strlen(rhre_plain) != rhre_plain_len) {
- zwarn("embedded NULs in PCRE pattern terminate pattern");
- }
- pcre_pat = pcre_compile(rhre_plain, pcre_opts, &pcre_err, &pcre_errptr, NULL);
- if (pcre_pat == NULL) {
- zwarn("failed to compile regexp /%s/: %s", rhre, pcre_err);
+ if (!(pcre_pat = pcre2_compile((PCRE2_SPTR) rhre_plain,
+ (PCRE2_SIZE) rhre_plain_len, pcre_opts,
+ &pcre_err, &pcre_erroff, NULL)))
+ {
+ PCRE2_UCHAR buffer[256];
+ pcre2_get_error_message(pcre_err, buffer, sizeof(buffer));
+ zwarn("failed to compile regexp /%s/: %s", rhre, buffer);
break;
}
- pcre_fullinfo(pcre_pat, NULL, PCRE_INFO_CAPTURECOUNT, &capcnt);
- ovsize = (capcnt+1)*3;
- ov = zalloc(ovsize*sizeof(int));
- r = pcre_exec(pcre_pat, NULL, lhstr_plain, lhstr_plain_len, 0, 0, ov, ovsize);
- /* r < 0 => error; r==0 match but not enough size in ov
+ pcre_mdata = pcre2_match_data_create_from_pattern(pcre_pat, NULL);
+ r = pcre2_match(pcre_pat, (PCRE2_SPTR8) lhstr_plain, lhstr_plain_len,
+ 0, 0, pcre_mdata, NULL);
+ /* r < 0 => error; r==0 match but not enough size in match data
* r > 0 => (r-1) substrings found; r==1 => no substrings
*/
if (r==0) {
- zwarn("reportable zsh problem: pcre_exec() returned 0");
+ zwarn("reportable zsh problem: pcre2_match() returned 0");
return_value = 1;
break;
}
- else if (r==PCRE_ERROR_NOMATCH) {
+ else if (r == PCRE2_ERROR_NOMATCH) {
return_value = 0; /* no match */
break;
}
@@ -444,7 +405,7 @@ cond_pcre_match(char **a, int id)
break;
}
else if (r>0) {
- zpcre_get_substrings(lhstr_plain, ov, r, svar, avar, 0,
+ zpcre_get_substrings(lhstr_plain, pcre_mdata, r, svar, avar, 0,
isset(BASHREMATCH),
!isset(BASHREMATCH));
return_value = 1;
@@ -457,10 +418,10 @@ cond_pcre_match(char **a, int id)
free(lhstr_plain);
if(rhre_plain)
free(rhre_plain);
+ if (pcre_mdata)
+ pcre2_match_data_free(pcre_mdata);
if (pcre_pat)
- pcre_free(pcre_pat);
- if (ov)
- zfree(ov, ovsize*sizeof(int));
+ pcre2_code_free(pcre_pat);
return return_value;
}
@@ -489,11 +450,11 @@ static struct builtin bintab[] = {
static struct features module_features = {
bintab, sizeof(bintab)/sizeof(*bintab),
-#if defined(HAVE_PCRE_COMPILE) && defined(HAVE_PCRE_EXEC)
+#if defined(HAVE_PCRE2_COMPILE_8) && defined(HAVE_PCRE2_H)
cotab, sizeof(cotab)/sizeof(*cotab),
-#else /* !(HAVE_PCRE_COMPILE && HAVE_PCRE_EXEC) */
+#else /* !(HAVE_PCRE2_COMPILE_8 && HAVE_PCRE2_H) */
NULL, 0,
-#endif /* !(HAVE_PCRE_COMPILE && HAVE_PCRE_EXEC) */
+#endif /* !(HAVE_PCRE2_COMPILE_8 && HAVE_PCRE2_H) */
NULL, 0,
NULL, 0,
0
@@ -540,19 +501,9 @@ cleanup_(Module m)
int
finish_(UNUSED(Module m))
{
-#if defined(HAVE_PCRE_COMPILE) && defined(HAVE_PCRE_EXEC)
-#ifdef HAVE_PCRE_STUDY
- if (pcre_hints)
-#ifdef PCRE_CONFIG_JIT
- pcre_free_study(pcre_hints);
-#else
- pcre_free(pcre_hints);
-#endif
- pcre_hints = NULL;
-#endif
-
+#if defined(HAVE_PCRE2_COMPILE_8) && defined(HAVE_PCRE2_H)
if (pcre_pattern)
- pcre_free(pcre_pattern);
+ pcre2_code_free(pcre_pattern);
pcre_pattern = NULL;
#endif
--- a/Test/V07pcre.ztst
+++ b/Test/V07pcre.ztst
@@ -129,12 +129,17 @@
>78884; ZPCRE_OP: 25 30
>90210; ZPCRE_OP: 31 36
-# Embedded NULs allowed in plaintext, but not in RE (although \0 as two-chars allowed)
+# Embedded NULs allowed in plaintext, in RE, pcre supports \0 as two-chars
[[ $'a\0bc\0d' =~ '^(a\0.)(.+)$' ]]
print "${#MATCH}; ${#match[1]}; ${#match[2]}"
0:ensure ASCII NUL passes in and out of matched plaintext
>6; 3; 3
+# PCRE2 supports NULs also in the RE
+ [[ $'a\0b\0c' =~ $'^(.\0)+' ]] && print "${#MATCH}; ${#match[1]}"
+0:ensure ASCII NUL works also in the regex
+>4; 2
+
# Ensure the long-form infix operator works
[[ foo -pcre-match ^f..$ ]]
print $?
@@ -181,7 +186,11 @@
[[ é =~ '^..\z' ]]; echo $?
LANG=$LANG_SAVE
[[ é =~ '^.\z' ]]; echo $?
-0:swich between C/UTF-8 locales
+0:switch between C/UTF-8 locales
>0
>0
>0
+
+ [[ abc =~ 'a(d*)bc' ]] && print "$#MATCH; $#match; ${#match[1]}"
+0:empty capture
+>3; 1; 0
--- a/configure.ac
+++ b/configure.ac
@@ -438,7 +438,7 @@ fi],
dnl Do you want to look for pcre support?
AC_ARG_ENABLE(pcre,
-AS_HELP_STRING([--enable-pcre],[enable the search for the pcre library (may create run-time library dependencies)]))
+AS_HELP_STRING([--enable-pcre],[enable the search for the pcre2 library (may create run-time library dependencies)]))
dnl Do you want to look for capability support?
AC_ARG_ENABLE(cap,
@@ -662,13 +662,12 @@ AC_HEADER_SYS_WAIT
oldcflags="$CFLAGS"
if test x$enable_pcre = xyes; then
-AC_CHECK_PROG([PCRECONF], pcre-config, pcre-config)
-dnl Typically (meaning on this single RedHat 9 box in front of me)
-dnl pcre-config --cflags produces a -I output which needs to go into
+AC_CHECK_PROG([PCRECONF], pcre2-config, pcre2-config)
+dnl pcre2-config --cflags may produce a -I output which needs to go into
dnl CPPFLAGS else configure's preprocessor tests don't pick it up,
dnl producing a warning.
-if test "x$ac_cv_prog_PCRECONF" = xpcre-config; then
- CPPFLAGS="$CPPFLAGS `pcre-config --cflags`"
+if test "x$ac_cv_prog_PCRECONF" = xpcre2-config; then
+ CPPFLAGS="$CPPFLAGS `pcre2-config --cflags`"
fi
fi
@@ -678,9 +677,10 @@ AC_CHECK_HEADERS(sys/time.h sys/times.h
locale.h errno.h stdio.h stdarg.h varargs.h stdlib.h \
unistd.h sys/capability.h \
utmp.h utmpx.h sys/types.h pwd.h grp.h poll.h sys/mman.h \
- netinet/in_systm.h pcre.h langinfo.h wchar.h stddef.h \
+ netinet/in_systm.h langinfo.h wchar.h stddef.h \
sys/stropts.h iconv.h ncurses.h ncursesw/ncurses.h \
ncurses/ncurses.h)
+AC_CHECK_HEADERS([pcre2.h],,,[#define PCRE2_CODE_UNIT_WIDTH 8])
if test x$dynamic = xyes; then
AC_CHECK_HEADERS(dlfcn.h)
AC_CHECK_HEADERS(dl.h)
@@ -958,9 +958,7 @@ if test "x$ac_found_iconv" = "xyes"; the
fi
if test x$enable_pcre = xyes; then
-dnl pcre-config should probably be employed here
-dnl AC_SEARCH_LIBS(pcre_compile, pcre)
- LIBS="`$ac_cv_prog_PCRECONF --libs` $LIBS"
+ LIBS="`$ac_cv_prog_PCRECONF --libs8` $LIBS"
fi
dnl ---------------------
@@ -1323,7 +1321,7 @@ AC_CHECK_FUNCS(strftime strptime mktime
pathconf sysconf \
tgetent tigetflag tigetnum tigetstr setupterm initscr resize_term \
getcchar setcchar waddwstr wget_wch win_wch use_default_colors \
- pcre_compile pcre_study pcre_exec \
+ pcre2_compile_8 \
nl_langinfo \
erand48 open_memstream \
posix_openpt \
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