Create a branch for audio work

svn path=/branches/audio-bringup/; revision=49478

lib/sdk/crt/mbstring/mbsncpy.c

@@ -0,0 +1,157 @@
+/*
+ * COPYRIGHT:   See COPYING in the top level directory
+ * PROJECT:     ReactOS system libraries
+ * FILE:        lib/msvcrt/mbstring/mbsncpy.c
+ * PURPOSE:     Copies a string to a maximum of n bytes or characters
+ * PROGRAMERS:
+ *              Copyright 1999 Ariadne
+ *              Copyright 1999 Alexandre Julliard
+ *              Copyright 2000 Jon Griffths
+ *
+ */
+
+#include <precomp.h>
+#include <mbstring.h>
+
+extern int g_mbcp_is_multibyte;
+
+/*
+ * @implemented
+ */
+unsigned char* _mbsncpy(unsigned char *dst, const unsigned char *src, size_t n)
+{
+  unsigned char* ret = dst;
+  if(!n)
+    return dst;
+  if (g_mbcp_is_multibyte)
+  {
+    while (*src && n)
+    {
+      n--;
+      if (_ismbblead(*src))
+      {
+        if (!*(src+1))
+        {
+            *dst++ = 0;
+            *dst++ = 0;
+            break;
+        }
+
+        *dst++ = *src++;
+      }
+
+      *dst++ = *src++;
+    }
+  }
+  else
+  {
+    while (n)
+    {
+        n--;
+        if (!(*dst++ = *src++)) break;
+    }
+  }
+  while (n--) *dst++ = 0;
+  return ret;
+}
+
+
+/*
+ * The _mbsnbcpy function copies count bytes from src to dest. If src is shorter
+ * than dest, the string is padded with null characters. If dest is less than or
+ * equal to count it is not terminated with a null character.
+ *
+ * @implemented
+ */
+unsigned char * _mbsnbcpy(unsigned char *dst, const unsigned char *src, size_t n)
+{
+  unsigned char* ret = dst;
+  if(!n)
+    return dst;
+  if(g_mbcp_is_multibyte)
+  {
+    int is_lead = 0;
+    while (*src && n)
+    {
+      is_lead = (!is_lead && _ismbblead(*src));
+      n--;
+      *dst++ = *src++;
+    }
+
+    if (is_lead) /* if string ends with a lead, remove it */
+      *(dst - 1) = 0;
+  }
+  else
+  {
+    while (n)
+    {
+        n--;
+        if (!(*dst++ = *src++)) break;
+    }
+  }
+  while (n--) *dst++ = 0;
+  return ret;
+}
+
+/*
+ * Unlike _mbsnbcpy this function does not pad the rest of the dest
+ * string with 0
+*/
+int CDECL _mbsnbcpy_s(unsigned char* dst, size_t size, const unsigned char* src, size_t n)
+{
+    size_t pos = 0;
+
+    if(!dst || size == 0)
+        return EINVAL;
+    if(!src)
+    {
+        dst[0] = '\0';
+        return EINVAL;
+    }
+    if(!n)
+        return 0;
+
+    if(g_mbcp_is_multibyte)
+    {
+        int is_lead = 0;
+        while (*src && n)
+        {
+            if(pos == size)
+            {
+                dst[0] = '\0';
+                return ERANGE;
+            }
+            is_lead = (!is_lead && _ismbblead(*src));
+            n--;
+            dst[pos++] = *src++;
+        }
+
+        if (is_lead) /* if string ends with a lead, remove it */
+            dst[pos - 1] = 0;
+    }
+    else
+    {
+        while (n)
+        {
+            n--;
+            if(pos == size)
+            {
+                dst[0] = '\0';
+                return ERANGE;
+            }
+
+            if(!(*src)) break;
+            dst[pos++] = *src++;
+        }
+    }
+
+    if(pos < size)
+        dst[pos] = '\0';
+    else
+    {
+        dst[0] = '\0';
+        return ERANGE;
+    }
+
+    return 0;
+}