Added code for strlcpy/cat ifndef STRLCPY_DEFINED

SVN revision: 1256

src/mxml.c

@@ -6,6 +6,9 @@
    Contents:     Midas XML Library
 
    $Log$
+   Revision 1.6  2005/03/21 16:02:08  ritt
+   Added code for strlcpy/cat ifndef STRLCPY_DEFINED
+
    Revision 1.5  2005/03/21 07:37:22  ritt
    Changed file mode
 
@@ -60,9 +63,77 @@ typedef int BOOL;
 
 /*------------------------------------------------------------------*/
 
-/* should come from midas.c, elogd.c etc. */
+#ifdef STRLCPY_DEFINED
+
 extern size_t strlcpy(char *dst, const char *src, size_t size);
-extern size_t strlcat(char *dst, const char *src, size_t size);
+extern size_t strlcat(char *dst, const char *src, size_t size)
+
+#else
+
+/*
+ * Copy src to string dst of size siz.  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless size == 0).
+ * Returns strlen(src); if retval >= siz, truncation occurred.
+ */
+size_t strlcpy(char *dst, const char *src, size_t size)
+{
+   char *d = dst;
+   const char *s = src;
+   size_t n = size;
+
+   /* Copy as many bytes as will fit */
+   if (n != 0 && --n != 0) {
+      do {
+         if ((*d++ = *s++) == 0)
+            break;
+      } while (--n != 0);
+   }
+
+   /* Not enough room in dst, add NUL and traverse rest of src */
+   if (n == 0) {
+      if (size != 0)
+         *d = '\0';             /* NUL-terminate dst */
+      while (*s++);
+   }
+
+   return (s - src - 1);        /* count does not include NUL */
+}
+
+/*
+ * Appends src to string dst of size siz (unlike strncat, siz is the
+ * full size of dst, not space left).  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless size <= strlen(dst)).
+ * Returns strlen(src) + MIN(size, strlen(initial dst)).
+ * If retval >= size, truncation occurred.
+ */
+size_t strlcat(char *dst, const char *src, size_t size)
+{
+   char *d = dst;
+   const char *s = src;
+   size_t n = size;
+   size_t dlen;
+
+   /* Find the end of dst and adjust bytes left but don't go past end */
+   while (n-- != 0 && *d != '\0')
+      d++;
+   dlen = d - dst;
+   n = size - dlen;
+
+   if (n == 0)
+      return (dlen + strlen(s));
+   while (*s != '\0') {
+      if (n != 1) {
+         *d++ = *s;
+         n--;
+      }
+      s++;
+   }
+   *d = '\0';
+
+   return (dlen + (s - src));   /* count does not include NUL */
+}
+
+#endif // STRLCPY_DEFINED
 
 /*------------------------------------------------------------------*/