Minor refactor of ICU casemap

diff --git a/src/icu_casemap.c b/src/icu_casemap.c
index 6453229..f75381e 100644 (file)
--- a/src/icu_casemap.c
+++ b/src/icu_casemap.c
@@ -80,95 +80,73 @@ int icu_casemap_casemap(struct icu_casemap * casemap,
                              casemap->action, status);
 }
 
-int icu_utf16_casemap(struct icu_buf_utf16 * dest16,
-                      struct icu_buf_utf16 * src16,
-                      const char *locale, char action,
-                      UErrorCode *status)
-{
-    int32_t dest16_len = 0;
 
-    if (!src16->utf16_len)
-    {           /* guarding for empty source string */
-        if (dest16->utf16)
-            dest16->utf16[0] = (UChar) 0;
-        dest16->utf16_len = 0;
-        return U_ZERO_ERROR;
-    }
-    
+static uint32_t icu_utf16_sub(struct icu_buf_utf16 * dest16,
+                          struct icu_buf_utf16 * src16,
+                          const char *locale, char action,
+                          UErrorCode *status)
+{
     switch (action)
     {
     case 'l':    
     case 'L':    
-        dest16_len = u_strToLower(dest16->utf16, dest16->utf16_cap,
-                                  src16->utf16, src16->utf16_len, 
-                                  locale, status);
-        break;
+        return u_strToLower(dest16->utf16, dest16->utf16_cap,
+                            src16->utf16, src16->utf16_len, 
+                            locale, status);
     case 'u':    
     case 'U':    
-        dest16_len = u_strToUpper(dest16->utf16, dest16->utf16_cap,
-                                  src16->utf16, src16->utf16_len, 
-                                  locale, status);
+        return u_strToUpper(dest16->utf16, dest16->utf16_cap,
+                            src16->utf16, src16->utf16_len, 
+                            locale, status);
         break;
     case 't':    
     case 'T':    
-        dest16_len = u_strToTitle(dest16->utf16, dest16->utf16_cap,
-                                  src16->utf16, src16->utf16_len,
-                                  0, locale, status);
+        return u_strToTitle(dest16->utf16, dest16->utf16_cap,
+                            src16->utf16, src16->utf16_len,
+                            0, locale, status);
         break;
     case 'f':    
     case 'F':    
-        dest16_len = u_strFoldCase(dest16->utf16, dest16->utf16_cap,
-                                   src16->utf16, src16->utf16_len,
-                                   U_FOLD_CASE_DEFAULT, status);
+        return u_strFoldCase(dest16->utf16, dest16->utf16_cap,
+                             src16->utf16, src16->utf16_len,
+                             U_FOLD_CASE_DEFAULT, status);
         break;
-        
     default:
-        return U_UNSUPPORTED_ERROR;
+        *status = U_UNSUPPORTED_ERROR;
         break;
     }
+    return 0;
+}
+
+
+int icu_utf16_casemap(struct icu_buf_utf16 * dest16,
+                      struct icu_buf_utf16 * src16,
+                      const char *locale, char action,
+                      UErrorCode *status)
+{
+    int32_t dest16_len = 0;
+
+    if (!src16->utf16_len)
+    {           /* guarding for empty source string */
+        if (dest16->utf16)
+            dest16->utf16[0] = (UChar) 0;
+        dest16->utf16_len = 0;
+        return U_ZERO_ERROR;
+    }
+    
+    dest16_len = icu_utf16_sub(dest16, src16, locale, action, status);
 
     /* check for buffer overflow, resize and retry */
     if (*status == U_BUFFER_OVERFLOW_ERROR
-        && dest16 != src16        /* do not resize if in-place conversion */
-        )
+        && dest16 != src16)      /* do not resize if in-place conversion */
     {
         icu_buf_utf16_resize(dest16, dest16_len * 2);
         *status = U_ZERO_ERROR;
 
-        switch (action) {    
-        case 'l':    
-        case 'L':    
-            dest16_len = u_strToLower(dest16->utf16, dest16->utf16_cap,
-                                      src16->utf16, src16->utf16_len, 
-                                      locale, status);
-            break;
-        case 'u':    
-        case 'U':    
-            dest16_len = u_strToUpper(dest16->utf16, dest16->utf16_cap,
-                                      src16->utf16, src16->utf16_len, 
-                                      locale, status);
-            break;
-        case 't':    
-        case 'T':    
-            dest16_len = u_strToTitle(dest16->utf16, dest16->utf16_cap,
-                                      src16->utf16, src16->utf16_len,
-                                      0, locale, status);
-            break;
-        case 'f':    
-        case 'F':    
-            dest16_len = u_strFoldCase(dest16->utf16, dest16->utf16_cap,
-                                       src16->utf16, src16->utf16_len,
-                                       U_FOLD_CASE_DEFAULT, status);
-            break;
-        
-        default:
-            return U_UNSUPPORTED_ERROR;
-            break;
-        }
+        icu_utf16_sub(dest16, src16, locale, action, status);
     }
-    
-    if (U_SUCCESS(*status)
-        && dest16_len <= dest16->utf16_cap)
+
+    if (U_SUCCESS(*status) && dest16_len <= dest16->utf16_cap)
         dest16->utf16_len = dest16_len;
     else
     {