Changeset 640ffe6 in mainline for uspace/app/sbi/src/os/posix.c

Timestamp:

2010-05-08T08:15:57Z (14 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

4039c77

Parents:

1317380 (diff), 051bc69a (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge from lp:~jsvoboda/helenos/sysel. New: cspan printing, boolean ops, enums, constructors etc.

File:

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

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

@@ -29 +29 @@
 /** @file POSIX-specific code. */
 
+#include <assert.h>
 #include <libgen.h>
 #include <stdio.h>
@@ -78 +79 @@
 }
 
+/** 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;
+
+        assert(start + length <= strlen(str));
+        slice = malloc(length + 1);
+        if (slice == NULL) {
+                printf("Memory allocation error.\n");
+                exit(1);
+        }
+
+        strncpy(slice, str + start, length);
+        slice[length] = '\0';
+
+        return slice;
+}
+
 /** Compare two strings.
  *