libc: Add definition for ssize_t

Add definition for ssize_t that may be useful to represent sizes with
variables that also need to be able to have negative values (e.g. to
represent errors).

Change-Id: I52ec69591ccfd760021dad38f5ba1b1ebe707ea5
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

2 files changed, 57 insertions, 0 deletions

diff --git a/lib/libc/minimal/include/bits/ssize_t.h b/lib/libc/minimal/include/bits/ssize_t.h
new file mode 100644
index 000000000..218253ad1
--- /dev/null
+++ b/lib/libc/minimal/include/bits/ssize_t.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file
+ * @brief ssize_t definition
+ */
+
+#if !defined(__ssize_t_defined)
+#define __ssize_t_defined
+
+#ifdef __i386
+typedef long int ssize_t;
+#elif defined(__ARM_ARCH)
+typedef int ssize_t;
+#elif defined(__arc__)
+typedef int ssize_t;
+#else
+#error "The minimal libc library does not recognize the architecture!\n"
+#endif
+
+#endif
diff --git a/lib/libc/minimal/include/sys/types.h b/lib/libc/minimal/include/sys/types.h
new file mode 100644
index 000000000..f706d35c5
--- /dev/null
+++ b/lib/libc/minimal/include/sys/types.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __INC_sys_types_h__
+#define __INC_sys_types_h__
+
+#include <bits/ssize_t.h>
+
+#endif /* __INC_sys_types_h__ */