Merge pull request #1167 from h2so5/refactor-mrb-strdump

Refactor mrb_str_dump

src/string.c

@@ -2293,47 +2293,60 @@ mrb_str_dump(mrb_state *mrb, mrb_value str)
   while (p < pend) {
     unsigned char c = *p++;
 
-      if (c == '"' || c == '\\') {
+    switch (c) {
+      case '"':
+      case '\\':
         *q++ = '\\';
         *q++ = c;
-      }
-      else if (c == '#') {
-          if (IS_EVSTR(p, pend)) *q++ = '\\';
-          *q++ = '#';
-      }
-      else if (c == '\n') {
+        break;
+
+      case '\n':
         *q++ = '\\';
         *q++ = 'n';
-      }
-      else if (c == '\r') {
+        break;
+    
+      case '\r':
         *q++ = '\\';
         *q++ = 'r';
-      }
-      else if (c == '\t') {
+        break;
+    
+      case '\t':
         *q++ = '\\';
         *q++ = 't';
-      }
-      else if (c == '\f') {
+        break;
+    
+      case '\f':
         *q++ = '\\';
         *q++ = 'f';
-      }
-      else if (c == '\013') {
+        break;
+    
+      case '\013':
         *q++ = '\\';
         *q++ = 'v';
-      }
-      else if (c == '\010') {
+        break;
+    
+      case '\010':
         *q++ = '\\';
         *q++ = 'b';
-      }
-      else if (c == '\007') {
+        break;
+    
+      case '\007':
         *q++ = '\\';
         *q++ = 'a';
-      }
-      else if (c == '\033') {
+        break;
+    
+      case '\033':
         *q++ = '\\';
         *q++ = 'e';
-      }
-      else if (ISPRINT(c)) {
+        break;
+    
+      case '#':
+        if (IS_EVSTR(p, pend)) *q++ = '\\';
+        *q++ = '#';
+        break;
+  
+      default:
+        if (ISPRINT(c)) {
           *q++ = c;
         }
         else {
@@ -2349,6 +2362,7 @@ mrb_str_dump(mrb_state *mrb, mrb_value str)
           q += 4;
         }
     }
+  }
   *q++ = '"';
   return mrb_obj_value(result);
 }