Signed-off-by: Patrick Georgi <patrick.geo...@secunet.com>
---
payloads/libpayload/include/strings.h | 35 ++++++++++++++++++++++++++++
payloads/libpayload/libc/Makefile.inc | 2 +-
payloads/libpayload/libc/strings.c | 40 +++++++++++++++++++++++++++++++++
3 files changed, 76 insertions(+), 1 deletions(-)
create mode 100644 payloads/libpayload/include/strings.h
create mode 100644 payloads/libpayload/libc/strings.c
diff --git a/payloads/libpayload/include/strings.h
b/payloads/libpayload/include/strings.h
new file mode 100644
index 0000000..ce7fe93
--- /dev/null
+++ b/payloads/libpayload/include/strings.h
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2011 secunet Security Networks AG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _STRING_H
+#define _STRING_H
+
+int ffs(int i);
+
+#endif
diff --git a/payloads/libpayload/libc/Makefile.inc
b/payloads/libpayload/libc/Makefile.inc
index 3cd98c9..d629ccc 100644
--- a/payloads/libpayload/libc/Makefile.inc
+++ b/payloads/libpayload/libc/Makefile.inc
@@ -32,7 +32,7 @@ TARGETS-$(CONFIG_LIBC) += libc/malloc.o libc/printf.o
libc/console.o libc/string
TARGETS-$(CONFIG_LIBC) += libc/memory.o libc/ctype.o libc/ipchecksum.o
libc/lib.o
TARGETS-$(CONFIG_LIBC) += libc/rand.o libc/time.o libc/exec.o
TARGETS-$(CONFIG_LIBC) += libc/readline.o libc/getopt_long.o libc/sysinfo.o
-TARGETS-$(CONFIG_LIBC) += libc/args.o
+TARGETS-$(CONFIG_LIBC) += libc/args.o libc/strings.o
# should be moved to coreboot directory
TARGETS-$(CONFIG_LAR) += libc/lar.o
diff --git a/payloads/libpayload/libc/strings.c
b/payloads/libpayload/libc/strings.c
new file mode 100644
index 0000000..9a56ba1
--- /dev/null
+++ b/payloads/libpayload/libc/strings.c
@@ -0,0 +1,40 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2011 secunet Security Networks AG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+int ffs(int i)
+{
+ int count = 1;
+ if (i == 0) return 0;
+
+ while ((i & 1) != 1) {
+ i>>=1;
+ count++;
+ }
+ return count;
+}
--
1.7.1
--
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