Changeset be2a38ad in mainline

Timestamp:

2012-08-16T10:37:59Z (12 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

56fd7cf, 7a7b8efa

Parents:

69cf3a4

Message:

Add functions chr_width() and str_width() to determine character and string display width on a character cell display.

Location:

uspace/lib/c

Files:

• generic/str.c (modified) (1 diff)
• include/str.h (modified) (1 diff)

uspace/lib/c/generic/str.c

@@ -397 +397 @@
         
         return len;
+}
+
+/** Get character display width on a character cell display.
+ *
+ * @param ch    Character
+ * @return      Width of character in cells.
+ */
+size_t chr_width(wchar_t ch)
+{
+        return 1;
+}
+
+/** Get string display width on a character cell display.
+ *
+ * @param str   String
+ * @return      Width of string in cells.
+ */
+size_t str_width(const char *str)
+{
+        size_t width = 0;
+        size_t offset = 0;
+        wchar_t ch;
+        
+        while ((ch = str_decode(str, &offset, STR_NO_LIMIT)) != 0)
+                width += chr_width(ch);
+        
+        return width;
 }
 

uspace/lib/c/include/str.h

@@ -73 +73 @@
 extern size_t wstr_nlength(const wchar_t *str, size_t size);
 
+extern size_t chr_width(wchar_t ch);
+extern size_t str_width(const char *str);
+
 extern bool ascii_check(wchar_t ch);
 extern bool chr_check(wchar_t ch);