Changeset b67c7d64 in mainline for uspace/lib/libc/generic/string.c

Timestamp:

2009-11-30T19:51:29Z (14 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

e866806

Parents:

0f06dbc

Message:

Add wstr_to_astr() for easy conversion from wide string to string.

File:

• uspace/lib/libc/generic/string.c (modified) (1 diff)

uspace/lib/libc/generic/string.c

@@ -579 +579 @@
 }
 
+/** Convert wide string to new string.
+ *
+ * Convert wide string @a src to string. Space for the new string is allocated
+ * on the heap.
+ *
+ * @param src   Source wide string.
+ * @return      New string.
+ */
+char *wstr_to_astr(const wchar_t *src)
+{
+        char dbuf[STR_BOUNDS(1)];
+        char *str;
+        wchar_t ch;
+
+        size_t src_idx;
+        size_t dest_off;
+        size_t dest_size;
+
+        /* Compute size of encoded string. */
+
+        src_idx = 0;
+        dest_size = 0;
+
+        while ((ch = src[src_idx++]) != 0) {
+                dest_off = 0;
+                if (chr_encode(ch, dbuf, &dest_off, STR_BOUNDS(1)) != EOK)
+                        break;
+                dest_size += dest_off;
+        }
+
+        str = malloc(dest_size + 1);
+        if (str == NULL)
+                return NULL;
+
+        /* Encode string. */
+
+        src_idx = 0;
+        dest_off = 0;
+
+        while ((ch = src[src_idx++]) != 0) {
+                if (chr_encode(ch, str, &dest_off, dest_size) != EOK)
+                        break;
+        }
+
+        str[dest_size] = '\0';
+        return str;
+}
+
+
 /** Convert string to wide string.
  *