* src/lib/evil_util.c:

* src/lib/evil_util.h:
	Add evil_utf16_to_utf8() function, display error messages
	and fix a bit the documentation of the other conversion
	functions.



SVN revision: 64636

legacy/evil/ChangeLog

@@ -1,3 +1,11 @@
+2011-11-02  Vincent Torri  <doursse at users dot sf dot net>
+
+	* src/lib/evil_util.c:
+	* src/lib/evil_util.h:
+	Add evil_utf16_to_utf8() function, display error messages
+	and fix a bit the documentation of the other conversion
+	functions.
+
 2011-10-12  Vincent Torri  <doursse at users dot sf dot net>
 
 	* src/lib/evil_util.c:

legacy/evil/src/lib/evil_util.c

@@ -21,15 +21,26 @@ evil_char_to_wchar(const char *text)
    wchar_t *wtext;
    int      wsize;
 
+   if (!text)
+     return NULL;
+
    wsize = MultiByteToWideChar(CP_ACP, 0, text, (int)strlen(text) + 1, NULL, 0);
    if ((wsize == 0) ||
        (wsize > (int)(ULONG_MAX / sizeof(wchar_t))))
-     return NULL;
+     {
+        if (wsize == 0)
+          _evil_last_error_display(__FUNCTION__);
+        return NULL;
+     }
 
    wtext = malloc(wsize * sizeof(wchar_t));
    if (wtext)
      if (!MultiByteToWideChar(CP_ACP, 0, text, (int)strlen(text) + 1, wtext, wsize))
-       return NULL;
+     {
+        if (wsize == 0)
+          _evil_last_error_display(__FUNCTION__);
+        return NULL;
+     }
 
    return wtext;
 }
@@ -40,9 +51,15 @@ evil_wchar_to_char(const wchar_t *text)
    char  *atext;
    int    asize;
 
+   if (!text)
+     return NULL;
+
    asize = WideCharToMultiByte(CP_ACP, 0, text, -1, NULL, 0, NULL, NULL);
    if (asize == 0)
-     return NULL;
+     {
+        _evil_last_error_display(__FUNCTION__);
+        return NULL;
+     }
 
    atext = (char*)malloc(asize * sizeof(char));
    if (!atext)
@@ -50,11 +67,49 @@ evil_wchar_to_char(const wchar_t *text)
 
    asize = WideCharToMultiByte(CP_ACP, 0, text, -1, atext, asize, NULL, NULL);
    if (asize == 0)
-     return NULL;
+     {
+        _evil_last_error_display(__FUNCTION__);
+        return NULL;
+     }
 
    return atext;
 }
 
+char *
+evil_utf16_to_utf8(const wchar_t *text16)
+{
+   char  *text8;
+   DWORD  flag = 0;
+   int    size8;
+
+   if (!text16)
+     return NULL;
+
+#if _WIN32_WINNT >= 0x0600
+   flag = WC_ERR_INVALID_CHARS;;
+#endif
+
+   size8 = WideCharToMultiByte(CP_UTF8, flag, text16, -1, NULL, 0, NULL, NULL);
+   if (size8 == 0)
+     {
+        _evil_last_error_display(__FUNCTION__);
+        return NULL;
+     }
+
+   text8 = (char*)malloc(size8 * sizeof(char));
+   if (!text8)
+     return NULL;
+
+   size8 = WideCharToMultiByte(CP_UTF8, flag, text16, -1, text8, size8, NULL, NULL);
+   if (size8 == 0)
+     {
+        _evil_last_error_display(__FUNCTION__);
+        return NULL;
+     }
+
+   return text8;
+}
+
 char *
 evil_format_message(long err)
 {

legacy/evil/src/lib/evil_util.h

@@ -10,7 +10,7 @@
  *
  * Convert a string from char * to wchar_t * and return it. If the
  * allocation or conversion fails, NULL is returned. On success, the
- * returned value must be freed.
+ * returned value must be freed when it is not used anymore.
  *
  * Conformity: Non applicable.
  *
@@ -29,7 +29,7 @@ EAPI wchar_t *evil_char_to_wchar(const char *text);
  *
  * Convert a string from wchar_t * to char * and return it. If the
  * allocation or conversion fails, NULL is returned. On success, the
- * returned value must be freed.
+ * returned value must be freed when it is not used anymore.
  *
  * Conformity: Non applicable.
  *
@@ -40,6 +40,25 @@ EAPI wchar_t *evil_char_to_wchar(const char *text);
  */
 EAPI char *evil_wchar_to_char(const wchar_t *text);
 
+/**
+ * @brief Convert a string from UTF-16 to UTF-8.
+ *
+ * @param text The string to convert in UTF-16.
+ * @return The converted string in UTF-8.
+ *
+ * Convert a string from UTF-16 to UTF-8 and return it. If the
+ * allocation or conversion fails, NULL is returned. On success, the
+ * returned value must be freed when it is not used anymore.
+ *
+ * Conformity: Non applicable.
+ *
+ * Supported OS: Windows 95, Windows 98, Windows Me, Windows NT, Windows 2000,
+ * Windows XP.
+ *
+ * @ingroup Evil
+ */
+EAPI char *evil_utf16_to_utf8(const wchar_t *text);
+
 EAPI char *evil_format_message(long err);
 
 EAPI char *evil_last_error_get(void);