Add byte_zzero, openb_read

5 files changed, 77 insertions, 0 deletions

diff --git a/src/include/skalibs/bytestr.h b/src/include/skalibs/bytestr.h
index 3a5c95e..b20a34d 100644
--- a/src/include/skalibs/bytestr.h
+++ b/src/include/skalibs/bytestr.h
@@ -31,6 +31,7 @@ extern size_t byte_in (char const *, size_t, char const *, size_t) gccattr_pure
 #define byte_equal(s, n, t) (!memcmp(s, (t), n))
 extern size_t byte_count (char const *, size_t, char) gccattr_pure ;
 extern size_t byte_search (char const *, size_t, char const *, size_t) ;
+extern void byte_zzero (char *, size_t) ;
 
 #define str_diffb(a, n, b) strncmp(a, (b), n)
 extern size_t str_chr (char const *, int) gccattr_pure ;
diff --git a/src/include/skalibs/djbunix.h b/src/include/skalibs/djbunix.h
index 6e2adcc..d3edc97 100644
--- a/src/include/skalibs/djbunix.h
+++ b/src/include/skalibs/djbunix.h
@@ -44,6 +44,7 @@ extern void lock_unx (int) ;
 extern int open2 (char const *, unsigned int) ;
 extern int open3 (char const *, unsigned int, unsigned int) ;
 extern int open_read (char const *) ;
+extern int openb_read (char const *) ;
 extern int open_readb (char const *) ;
 extern int open_excl (char const *) ;
 extern int open_append (char const *) ;
diff --git a/src/libstddjb/byte_zzero.c b/src/libstddjb/byte_zzero.c
new file mode 100644
index 0000000..99a5e3a
--- /dev/null
+++ b/src/libstddjb/byte_zzero.c
@@ -0,0 +1,35 @@
+/* ISC license. */
+
+#include <skalibs/sysdeps.h>
+
+#ifdef SKALIBS_HASEXPLICIT_BZERO
+
+#include <skalibs/nonposix.h>
+#include <string.h>
+#include <strings.h>
+#include <skalibs/bytestr.h>
+
+void byte_zzero (char *s, size_t n)
+{
+  explicit_bzero(s, n) ;
+}
+
+#else
+
+#include <string.h>
+#include <skalibs/gccattributes.h>
+#include <skalibs/bytestr.h>
+
+void _byte_zzero_hook (char *, size_t) gccattr_weak ;
+
+gccattr_weak void _byte_zzero_hook (char *s, size_t n)
+{
+}
+
+void byte_zzero (char *s, size_t n)
+{
+  memset(s, 0, n) ;
+  _byte_zzero_hook(s, n) ;
+}
+
+#endif
diff --git a/src/libstddjb/openb_read.c b/src/libstddjb/openb_read.c
new file mode 100644
index 0000000..19ec073
--- /dev/null
+++ b/src/libstddjb/openb_read.c
@@ -0,0 +1,10 @@
+/* ISC license. */
+
+#include <skalibs/nonposix.h>
+#include <fcntl.h>
+#include <skalibs/djbunix.h>
+
+int openb_read (char const *fn)
+{
+  return open2(fn, O_RDONLY) ;
+}
diff --git a/src/sysdeps/tryexplicit_bzero.c b/src/sysdeps/tryexplicit_bzero.c
new file mode 100644
index 0000000..869c578
--- /dev/null
+++ b/src/sysdeps/tryexplicit_bzero.c
@@ -0,0 +1,30 @@
+/* ISC license. */
+
+#undef _POSIX_C_SOURCE
+#undef _XOPEN_SOURCE
+
+#ifndef __EXTENSIONS__
+#define __EXTENSIONS__
+#endif
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE
+#endif
+#ifndef _NETBSD_SOURCE
+#define _NETBSD_SOURCE
+#endif
+#ifndef _INCOMPLETE_XOPEN_C063
+#define _INCOMPLETE_XOPEN_C063
+#endif
+
+#include <string.h>
+#include <strings.h>
+
+int main (void)
+{
+  char blah[4] ;
+  explicit_bzero(blah, 4) ;
+  return 0 ;
+}