X-Git-Url: https://ncurses.scripts.mit.edu/?a=blobdiff_plain;f=form%2Ffty_regex.c;h=62dcab58c35223a40df9d8b090f32522a34e32ab;hb=5487d20851d0dea54352bb44817b39e9945f90c2;hp=2a95c126a5197009cae778b4bda9a1210f32bc13;hpb=f5da57ad7eb397b1001e2fca9cb0e278a6564716;p=ncurses.git

diff --git a/form/fty_regex.c b/form/fty_regex.c
index 2a95c126..62dcab58 100644
--- a/form/fty_regex.c
+++ b/form/fty_regex.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998-2007,2009 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 1.23 2009/11/07 20:17:58 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
   {
@@ -113,19 +152,18 @@ Generic_RegularExpression_Type(void *arg MAYBE_UNUSED)
 
   if (rx)
     {
-      preg = typeMalloc(RegExp_Arg, 1);
+      preg = typeCalloc(RegExp_Arg, 1);
 
       if (preg)
 	{
-	  T((T_CREATE("RegExp_Arg %p"), preg));
+	  T((T_CREATE("RegExp_Arg %p"), (void *)preg));
 	  if (((preg->pRegExp = typeMalloc(regex_t, 1)) != 0)
 	      && !regcomp(preg->pRegExp, rx,
 			  (REG_EXTENDED | REG_NOSUB | REG_NEWLINE)))
 	    {
-	      T((T_CREATE("regex_t %p"), preg->pRegExp));
-	      preg->refCount = typeMalloc(unsigned long, 1);
-
-	      *(preg->refCount) = 1;
+	      T((T_CREATE("regex_t %p"), (void *)preg->pRegExp));
+	      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;