ncurses 6.2 - patch 20210925

[ncurses.git] / form / fty_regex.c

diff --git a/form/fty_regex.c b/form/fty_regex.c
index 65405621eafc5cadd2709be71d4a126afca26250..62dcab58c35223a40df9d8b090f32522a34e32ab 100644 (file)
--- a/form/fty_regex.c
+++ b/form/fty_regex.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright 2018,2020 Thomas E. Dickey                                     *
+ * Copyright 2018-2020,2021 Thomas E. Dickey                                *
  * Copyright 1998-2012,2015 Free Software Foundation, Inc.                  *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
@@ -35,12 +35,43 @@
 
 #include "form.priv.h"
 
-MODULE_ID("$Id: fty_regex.c,v 1.29 2020/02/29 15:46:00 anonymous.maarten Exp $")
+MODULE_ID("$Id: fty_regex.c,v 1.33 2021/08/14 15:01:52 tom Exp $")
 
 #if HAVE_REGEX_H_FUNCS || HAVE_LIB_PCRE2       /* We prefer POSIX regex */
 
 #if HAVE_PCRE2POSIX_H
 #include <pcre2posix.h>
+
+/* pcre2 used to provide its "POSIX" entrypoints using the same names as the
+ * standard ones in the C runtime, but that never worked because the linker
+ * would use the C runtime.  Debian patched the library to fix this symbol
+ * conflict, but overlooked the header file, and Debian's patch was made
+ * obsolete when pcre2 was changed early in 2019 to provide different names.
+ *
+ * Here is a workaround to make the older version of Debian's package work.
+ */
+#if !defined(PCRE2regcomp) && defined(HAVE_PCRE2REGCOMP)
+
+#undef regcomp
+#undef regexec
+#undef regfree
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+  PCRE2POSIX_EXP_DECL int PCRE2regcomp(regex_t *, const char *, int);
+  PCRE2POSIX_EXP_DECL int PCRE2regexec(const regex_t *, const char *, size_t,
+                                      regmatch_t *, int);
+  PCRE2POSIX_EXP_DECL void PCRE2regfree(regex_t *);
+#ifdef __cplusplus
+}                              /* extern "C" */
+#endif
+#define regcomp(r,s,n)          PCRE2regcomp(r,s,n)
+#define regexec(r,s,n,m,x)      PCRE2regexec(r,s,n,m,x)
+#define regfree(r)              PCRE2regfree(r)
+#endif
+/* end workaround... */
 #elif HAVE_PCREPOSIX_H
 #include <pcreposix.h>
 #else
@@ -340,14 +371,14 @@ static FIELDTYPE typeREGEXP =
 #endif
 };
 
-NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_REGEXP = &typeREGEXP;
+FORM_EXPORT_VAR(FIELDTYPE *) TYPE_REGEXP = &typeREGEXP;
 
 #if NCURSES_INTEROP_FUNCS
 /* The next routines are to simplify the use of ncurses from
-   programming languages with restictions on interop with C level
+   programming languages with restrictions on interop with C level
    constructs (e.g. variable access or va_list + ellipsis constructs)
 */
-NCURSES_EXPORT(FIELDTYPE *)
+FORM_EXPORT(FIELDTYPE *)
 _nc_TYPE_REGEXP(void)
 {
   return TYPE_REGEXP;