Merge pull request #969 from pwpiwi/gcc10_fixes

[proxmark3-svn] / bootrom / string.c

diff --git a/bootrom/string.c b/bootrom/string.c
new file mode 100644 (file)
index 0000000..b2710d0
--- /dev/null
+++ b/bootrom/string.c
@@ -0,0 +1,104 @@
+//-----------------------------------------------------------------------------
+// Jonathan Westhues, Sept 2005
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Common string.h functions
+//-----------------------------------------------------------------------------
+
+#include "string.h"
+#include <stdint.h>
+
+void *memcpy(void *dest, const void *src, size_t len) {
+       uint8_t *d = dest;
+       const uint8_t *s = src;
+       while((len--) > 0) {
+               *d = *s;
+               d++;
+               s++;
+       }
+       return dest;
+}
+
+
+void *memset(void *dest, int c, size_t len) {
+       uint8_t *d = dest;
+       while((len--) > 0) {
+               *d = c;
+               d++;
+       }
+       return dest;
+}
+
+
+void *memmove(void *dest, const void *src, size_t len) {
+       uint8_t *d = dest;
+       const uint8_t *s = src;
+       if (dest <= src) {
+               while((len--) > 0) {
+                       *d = *s;
+                       d++;
+                       s++;
+               } 
+       } else {
+               d = d + len - 1;
+               s = s + len - 1;
+               while((len--) > 0) {
+                       *d = *s;
+                       d--;
+                       s--;
+               }
+       }
+       return dest;
+}
+
+
+int memcmp(const void *av, const void *bv, size_t len) {
+       const uint8_t *a = av;
+       const uint8_t *b = bv;
+
+       while((len--) > 0) {
+               if(*a != *b) {
+                       return *a - *b;
+               }
+               a++;
+               b++;
+       }
+       return 0;
+}
+
+
+size_t strlen(const char *str) {
+       int l = 0;
+       while(*str) {
+               l++;
+               str++;
+       }
+       return l;
+}
+
+
+char* strncat(char *dest, const char *src, size_t n) {
+       unsigned int dest_len = strlen(dest);
+       unsigned int i;
+
+       for (i = 0 ; i < n && src[i] != '\0' ; i++)
+               dest[dest_len + i] = src[i];
+       dest[dest_len + i] = '\0';
+
+       return dest;
+}
+
+
+char* strcat(char *dest, const char *src) {
+       unsigned int dest_len = strlen(dest);
+       unsigned int i;
+
+       for (i = 0 ; src[i] != '\0' ; i++)
+               dest[dest_len + i] = src[i];
+       dest[dest_len + i] = '\0';
+
+       return dest;
+}