From 92e40f4f3b8e153b86093996d2a6d2a1160e105d Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Sat, 11 May 2019 06:22:36 +0000
Subject:  Add tryemptyregex/skalibs_regcomp, prepare for 2.8.1.0

---
 src/include/skalibs/posixplz.h |  8 ++++++++
 src/sysdeps/tryemptyregex.c    | 16 ++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 src/sysdeps/tryemptyregex.c

(limited to 'src')

diff --git a/src/include/skalibs/posixplz.h b/src/include/skalibs/posixplz.h
index 639a7c4..22cdf3a 100644
--- a/src/include/skalibs/posixplz.h
+++ b/src/include/skalibs/posixplz.h
@@ -5,6 +5,7 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <regex.h>
 
 #include <skalibs/gccattributes.h>
 #include <skalibs/functypes.h>
@@ -44,4 +45,11 @@ extern int mkhtemp (char const *, char *) ;
 extern int mkctemp (char *, mode_t, dev_t) ;
 extern int mkbtemp (char *, mode_t, dev_t) ;
 
+
+ /*
+    Wrappers around functions that should be specified better.
+ */
+
+#define skalibs_regcomp(re, s, flags) regcomp(re, (s)[0] ? (s) : ".*", flags)
+
 #endif
diff --git a/src/sysdeps/tryemptyregex.c b/src/sysdeps/tryemptyregex.c
new file mode 100644
index 0000000..a2243f7
--- /dev/null
+++ b/src/sysdeps/tryemptyregex.c
@@ -0,0 +1,16 @@
+/* ISC license. */
+
+#include <regex.h>
+
+int main (void)
+{
+  regex_t re ;
+  int r = regcomp(&re, "", REG_EXTENDED | REG_NOSUB) ;
+  switch (r)
+  {
+    case 0 : break ;
+    case REG_ESPACE : return 111 ;
+    default : return 1 ;
+  }
+  return !!regexec(&re, "a", 0, 0, 0) ;
+}
-- 
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