lib/string/ctype/strisascii/: strisprint(): Add function

Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/lib/Makefile.am b/lib/Makefile.am
index e9ffd7e1ff7f5a4cff773ad7393660192695d6e9..fd9292a3ed5db3328f15bbb27fb04b63f1ebb8e1 100644 (file)
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -181,6 +181,8 @@ libshadow_la_SOURCES = \
        sssd.h \
        string/ctype/strisascii/strisdigit.c \
        string/ctype/strisascii/strisdigit.h \
+       string/ctype/strisascii/strisprint.c \
+       string/ctype/strisascii/strisprint.h \
        string/ctype/strtoascii/strtolower.c \
        string/ctype/strtoascii/strtolower.h \
        string/memset/memzero.c \

diff --git a/lib/string/ctype/strisascii/strisprint.c b/lib/string/ctype/strisascii/strisprint.c
new file mode 100644 (file)
index 0000000..8fc6296
--- /dev/null
+++ b/lib/string/ctype/strisascii/strisprint.c
@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: 2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "string/ctype/strisascii/strisprint.h"
+
+#include <stdbool.h>
+
+
+extern inline bool strisprint(const char *s);

diff --git a/lib/string/ctype/strisascii/strisprint.h b/lib/string/ctype/strisascii/strisprint.h
new file mode 100644 (file)
index 0000000..12e6a89
--- /dev/null
+++ b/lib/string/ctype/strisascii/strisprint.h
@@ -0,0 +1,39 @@
+// SPDX-FileCopyrightText: 2024-2025, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_STRING_CTYPE_STRISASCII_STRISPRINT_H_
+#define SHADOW_INCLUDE_LIB_STRING_CTYPE_STRISASCII_STRISPRINT_H_
+
+
+#include <config.h>
+
+#include <ctype.h>
+#include <stdbool.h>
+
+#include "string/strcmp/streq.h"
+
+
+inline bool strisprint(const char *s);
+
+
+// string is [:print:]
+// Like isprint(3), but check all characters in the string.
+inline bool
+strisprint(const char *s)
+{
+       if (streq(s, ""))
+               return false;
+
+       for (; !streq(s, ""); s++) {
+               unsigned char  c = *s;
+
+               if (!isprint(c))
+                       return false;
+       }
+
+       return true;
+}
+
+
+#endif  // include guard