Changeset 051bc69a in mainline for uspace/app/sbi/src/os/helenos.c

Timestamp:

2010-05-08T08:10:44Z (14 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

640ffe6, c5cb943d

Parents:

25a76ab8

Message:

Update SBI to rev. 244.

File:

• uspace/app/sbi/src/os/helenos.c (modified) (2 diffs)

uspace/app/sbi/src/os/helenos.c

@@ -29 +29 @@
 /** @file HelenOS-specific code. */
 
+#include <assert.h>
 #include <errno.h>
 #include <stdio.h>
@@ -75 +76 @@
 }
 
+/** Return slice (substring) of a string.
+ *
+ * Copies the specified range of characters from @a str and returns it
+ * as a newly allocated string. @a start + @a length must be less than
+ * or equal to the length of @a str.
+ *
+ * @param str           String
+ * @param start         Index of first character (starting from zero).
+ * @param length        Number of characters to copy.
+ *
+ * @return              Newly allocated string holding the slice.
+ */
+char *os_str_aslice(const char *str, size_t start, size_t length)
+{
+        char *slice;
+        size_t offset;
+        size_t i;
+        size_t size;
+        wchar_t c;
+
+        assert(start + length <= str_length(str));
+
+        offset = 0;
+        for (i = 0; i < start; ++i) {
+                c = str_decode(str, &offset, STR_NO_LIMIT);
+                assert(c != '\0');
+                assert(c != U_SPECIAL);
+                (void) c;
+        }
+
+        size = str_lsize(str, length);
+        slice = str_ndup(str + offset, size);
+
+        return slice;
+}
+
 /** Compare two strings.
  *