First commit
Signed-off-by: <inaky.perez-gonzalez@intel.com>
diff --git a/lib/libc/minimal/source/string/string.c b/lib/libc/minimal/source/string/string.c
new file mode 100644
index 0000000..04c12ea
--- /dev/null
+++ b/lib/libc/minimal/source/string/string.c
@@ -0,0 +1,230 @@
+/* string.c - common string routines */
+
+/*
+ * Copyright (c) 2014 Wind River Systems, Inc.
+ *
+ * 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 Wind River Systems 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 HOLDER 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.
+ */
+
+#include <string.h>
+
+/*******************************************************************************
+*
+* strcpy - copy a string
+*
+* RETURNS: pointer to destination buffer <d>
+*/
+
+char *strcpy(char *restrict d, const char *restrict s)
+{
+ char *dest = d;
+
+ while (*s != '\0') {
+ *d = *s;
+ d++;
+ s++;
+ }
+
+ *d = '\0';
+
+ return dest;
+}
+
+/*******************************************************************************
+*
+* strncpy - copy part of a string
+*
+* RETURNS: pointer to destination buffer <d>
+*/
+
+char *strncpy(char *restrict d, const char *restrict s, size_t n)
+{
+ char *dest = d;
+
+ while ((n > 0) && *s != '\0') {
+ *d = *s;
+ s++;
+ d++;
+ n--;
+ }
+
+ while (n > 0) {
+ *d = '\0';
+ n--;
+ }
+
+ return dest;
+}
+
+/*******************************************************************************
+*
+* strchr - string scanning operation
+*
+* RETURNS: pointer to 1st instance of found byte, or NULL if not found
+*/
+
+char *strchr(const char *s, int c)
+{
+ char tmp = (char) c;
+
+ while ((*s != tmp) && (*s != '\0'))
+ s++;
+
+ return (*s == tmp) ? (char *) s : NULL;
+}
+
+/*******************************************************************************
+*
+* strlen - get string length
+*
+* RETURNS: number of bytes in string <s>
+*/
+
+size_t strlen(const char *s)
+{
+ size_t n = 0;
+
+ while (*s != '\0') {
+ s++;
+ n++;
+ }
+
+ return n;
+}
+
+/*******************************************************************************
+*
+* strcmp - compare two strings
+*
+* RETURNS: negative # if <s1> < <s2>, 0 if <s1> == <s2>, else positive #
+*/
+
+int strcmp(const char *s1, const char *s2)
+{
+ while ((*s1 == *s2) && (*s1 != '\0')) {
+ s1++;
+ s2++;
+ }
+
+ return *s1 - *s2;
+}
+
+/*******************************************************************************
+*
+* strncmp - compare part of two strings
+*
+* RETURNS: negative # if <s1> < <s2>, 0 if <s1> == <s2>, else positive #
+*/
+
+int strncmp(const char *s1, const char *s2, size_t n)
+{
+ while ((n > 0) && (*s1 == *s2) && (*s1 != '\0')) {
+ s1++;
+ s2++;
+ n--;
+ }
+
+ return (n == 0) ? 0 : (*s1 - *s2);
+}
+
+/*******************************************************************************
+*
+* memmove - copy bytes in memory with overlapping areas
+*
+* RETURNS: pointer to destination buffer <d>
+*/
+
+void *memmove(void *d, const void *s, size_t n)
+{
+ char *dest = d;
+ const char *src = s;
+
+ if ((size_t) (d - s) < n) {
+ /*
+ * The <src> buffer overlaps with the start of the <dest> buffer.
+ * Copy backwards to prevent the premature corruption of <src>.
+ */
+
+ while (n > 0) {
+ n--;
+ dest[n] = src[n];
+ }
+ } else {
+ /* It is safe to perform a forward-copy */
+ while (n > 0) {
+ *dest = *src;
+ dest++;
+ src++;
+ n--;
+ }
+ }
+
+ return d;
+}
+
+/*******************************************************************************
+*
+* memcpy - copy bytes in memory
+*
+* RETURNS: pointer to destination buffer <dest>
+*/
+
+void *memcpy(void *restrict d, const void *restrict s, size_t n)
+{
+ char *dest = d;
+ const char *src = s;
+
+ while (n > 0) {
+ *dest = *src;
+ dest++;
+ src++;
+ n--;
+ }
+
+ return d;
+}
+
+/*******************************************************************************
+*
+* memset - set bytes in memory
+*
+* RETURNS: pointer to buffer <s>
+*/
+
+void *memset(void *s, int c, size_t n)
+{
+ unsigned char *mem = s;
+ unsigned char uc = (unsigned char) c;
+
+ while (n > 0) {
+ *mem = uc;
+ mem++;
+ n--;
+ }
+
+ return s;
+}
