ncurses 6.4 - patch 20240414

[ncurses.git] / form / fty_regex.c

diff --git a/form/fty_regex.c b/form/fty_regex.c
index 2c0a4caa6bb312d82247a92ecec8ea4cc9d83989..62dcab58c35223a40df9d8b090f32522a34e32ab 100644 (file)
--- a/form/fty_regex.c
+++ b/form/fty_regex.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc.              *
+ * 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  *
  * copy of this software and associated documentation files (the            *
@@ -34,10 +35,48 @@
 
 #include "form.priv.h"
 
-MODULE_ID("$Id: fty_regex.c,v 1.24 2010/01/23 21:14:37 tom Exp $")
+MODULE_ID("$Id: fty_regex.c,v 1.33 2021/08/14 15:01:52 tom Exp $")
 
-#if HAVE_REGEX_H_FUNCS         /* We prefer POSIX regex */
+#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
 #include <regex.h>
+#endif
 
 typedef struct
   {
@@ -113,7 +152,7 @@ Generic_RegularExpression_Type(void *arg MAYBE_UNUSED)
 
   if (rx)
     {
-      preg = typeMalloc(RegExp_Arg, 1);
+      preg = typeCalloc(RegExp_Arg, 1);
 
       if (preg)
        {
@@ -123,9 +162,8 @@ Generic_RegularExpression_Type(void *arg MAYBE_UNUSED)
                          (REG_EXTENDED | REG_NOSUB | REG_NEWLINE)))
            {
              T((T_CREATE("regex_t %p"), (void *)preg->pRegExp));
-             preg->refCount = typeMalloc(unsigned long, 1);
-
-             *(preg->refCount) = 1;
+             if ((preg->refCount = typeMalloc(unsigned long, 1)) != 0)
+                *(preg->refCount) = 1;
            }
          else
            {
@@ -151,9 +189,8 @@ Generic_RegularExpression_Type(void *arg MAYBE_UNUSED)
 
          T((T_CREATE("RegExp_Arg %p"), pArg));
          pArg->compiled_expression = NULL;
-         pArg->refCount = typeMalloc(unsigned long, 1);
-
-         *(pArg->refCount) = 1;
+         if ((pArg->refCount = typeMalloc(unsigned long, 1)) != 0)
+            *(pArg->refCount) = 1;
 
          do
            {
@@ -266,6 +303,7 @@ Free_RegularExpression_Type(void *argp MAYBE_UNUSED)
            {
              free(ap->refCount);
              regfree(ap->pRegExp);
+             free(ap->pRegExp);
            }
 #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
          if (ap->compiled_expression)
@@ -333,14 +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;