Changeset 560d79f in mainline

Timestamp:

2012-03-02T14:50:25Z (13 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

76f382b

Parents:

0030eef

Message:

implement str_nsize, wstr_nsize

Location:

uspace/lib/c

Files:

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

uspace/lib/c/generic/str.c

@@ -259 +259 @@
         
         return offset;
+}
+
+/** Get size of string with size limit.
+ *
+ * Get the number of bytes which are used by the string @a str
+ * (excluding the NULL-terminator), but no more than @max_size bytes.
+ *
+ * @param str      String to consider.
+ * @param max_size Maximum number of bytes to measure.
+ *
+ * @return Number of bytes used by the string
+ *
+ */
+size_t str_nsize(const char *str, size_t max_size)
+{
+        size_t size = 0;
+        
+        while ((*str++ != 0) && (size < max_size))
+                size++;
+        
+        return size;
+}
+
+/** Get size of wide string with size limit.
+ *
+ * Get the number of bytes which are used by the wide string @a str
+ * (excluding the NULL-terminator), but no more than @max_size bytes.
+ *
+ * @param str      Wide string to consider.
+ * @param max_size Maximum number of bytes to measure.
+ *
+ * @return Number of bytes used by the wide string
+ *
+ */
+size_t wstr_nsize(const wchar_t *str, size_t max_size)
+{
+        return (wstr_nlength(str, max_size) * sizeof(wchar_t));
 }
 

uspace/lib/c/include/str.h

@@ -60 +60 @@
 extern size_t str_size(const char *str);
 extern size_t wstr_size(const wchar_t *str);
+
+extern size_t str_nsize(const char *str, size_t max_size);
+extern size_t wstr_nsize(const wchar_t *str, size_t max_size);
 
 extern size_t str_lsize(const char *str, size_t max_len);