os: lib: Import string lib

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 73 insertions, 0 deletions

diff --git a/src/sys/include/lib/string.h b/src/sys/include/lib/string.h
new file mode 100644
index 0000000..3da8b5f
--- /dev/null
+++ b/src/sys/include/lib/string.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _LIB_STRING_H
+#define _LIB_STRING_H 1
+
+#include <sys/types.h>
+#include <sys/cdefs.h>
+#include <stdarg.h>
+
+#ifndef _HAVE_SIZE_T
+#define _HAVE_SIZE_T
+typedef __size_t size_t;
+#endif  /* _HAVE_SIZE_T */
+
+#ifndef _HAVE_INT64_T
+#define _HAVE_INT64_T
+typedef __int64_t int64_t;
+#endif  /* _HAVE_INT64_T */
+
+__BEGIN_DECLS
+size_t strlen(const char *s);
+void *memset(void *s, int c, size_t n);
+void *memcpy(void *dest, const void *src, size_t n);
+int strncmp(const char *s1, const char *s2, size_t n);
+int memcmp(const void *s1, const void *s2, size_t n);
+int strcmp(const char *s1, const char *s2);
+int atoi(char *s);
+
+/* XXX: Maybe move to stdio.h? */
+int vsnprintf(char *s, size_t size, const char *fmt, va_list ap);
+int snprintf(char *s, size_t size, const char *fmt, ...);
+
+/*
+ * E0 specific string routine
+ *
+ * Convert base<n> value to string
+ *
+ * @value: Value to convert
+ * @buf: Buffer to store string
+ * @base: Radix to convert to
+ */
+char *itoa(int64_t value, char *buf, int base);
+
+__END_DECLS
+
+#endif  /* !_LIB_STRING_H */