wcs* use wchar_t on POSIX, which is not the same as WCHAR

so, winchar_* is introduced which uses WCHAR


git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@4883 212acab6-be3b-0410-9dea-997c60f758d6

Source/winchar.cpp

@@ -0,0 +1,102 @@
+#include "Platform.h"
+#include "winchar.h"
+#include "util.h"
+
+#include <stdexcept>
+
+using std::runtime_error;
+
+WCHAR *winchar_fromansi(const char* s) {
+  int l = MultiByteToWideChar(CP_ACP, 0, s, -1, 0, 0);
+  if (l == 0)
+    throw runtime_error("Unicode conversion failed");
+
+  WCHAR *ws = new WCHAR[l + 1];
+
+  if (MultiByteToWideChar(CP_ACP, 0, s, -1, ws, l + 1) == 0)
+    throw runtime_error("Unicode conversion failed");
+
+  return ws;
+}
+
+char *winchar_toansi(const WCHAR* ws)
+{
+  int l = WideCharToMultiByte(CP_ACP, 0, ws, -1, 0, 0, 0, 0);
+  if (l == 0)
+    throw runtime_error("Unicode conversion failed");
+
+  char *s = new char[l + 1];
+
+  if (WideCharToMultiByte(CP_ACP, 0, ws, -1, s, l + 1, 0, 0) == 0)
+    throw runtime_error("Unicode conversion failed");
+
+  return s;
+}
+
+WCHAR *winchar_strcpy(WCHAR *ws1, const WCHAR *ws2)
+{
+  WCHAR *ret = ws1;
+
+  while (*ws2)
+  {
+    *ws1++ = *ws2++;
+  }
+
+  *ws1 = 0;
+
+  return ret;
+}
+
+WCHAR *winchar_strncpy(WCHAR *ws1, const WCHAR *ws2, size_t n)
+{
+  WCHAR *ret = ws1;
+
+  while (n && *ws2)
+  {
+    *ws1++ = *ws2++;
+    n--;
+  }
+
+  while (n--)
+  {
+    *ws1++ = 0;
+  }
+
+  return ret;
+}
+
+size_t winchar_strlen(WCHAR *ws)
+{
+  size_t len = 0;
+
+  while (*ws++)
+  {
+    len++;
+  }
+
+  return len;
+}
+
+int winchar_strcmp(const WCHAR *ws1, const WCHAR *ws2)
+{
+  WCHAR diff = 0;
+
+  do
+  {
+    diff = *ws1 - *ws2;
+  }
+  while (*ws1++ && *ws2++);
+
+  return static_cast<int>(diff);
+}
+
+int winchar_stoi(const WCHAR *ws)
+{
+  char *s = winchar_toansi(ws);
+
+  int ret = atoi(s);
+
+  delete [] s;
+
+  return ret;
+}