1 files changed, 139 insertions, 0 deletions
diff --git a/include/xalloc.h b/include/xalloc.h
new file mode 100644
index 0000000..c4124cb
--- /dev/null
+++ b/include/xalloc.h
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ *
+ * General memory allocation wrappers for malloc, realloc, calloc and strdup
+ */
+
+#ifndef UTIL_LINUX_XALLOC_H
+#define UTIL_LINUX_XALLOC_H
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "c.h"
+
+#ifndef XALLOC_EXIT_CODE
+# define XALLOC_EXIT_CODE EXIT_FAILURE
+#endif
+
+static inline
+__attribute__((__noreturn__))
+void __err_oom(const char *file, unsigned int line)
+{
+	err(XALLOC_EXIT_CODE, "%s: %u: cannot allocate memory", file, line);
+}
+
+#define err_oom()	__err_oom(__FILE__, __LINE__)
+
+static inline
+__ul_alloc_size(1)
+__ul_returns_nonnull
+void *xmalloc(const size_t size)
+{
+	void *ret = malloc(size);
+
+	if (!ret && size)
+		err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
+	return ret;
+}
+
+static inline
+__ul_alloc_size(2)
+__ul_returns_nonnull
+void *xrealloc(void *ptr, const size_t size)
+{
+	void *ret = realloc(ptr, size);
+
+	if (!ret && size)
+		err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
+	return ret;
+}
+
+static inline
+__ul_calloc_size(1, 2)
+__ul_returns_nonnull
+void *xcalloc(const size_t nelems, const size_t size)
+{
+	void *ret = calloc(nelems, size);
+
+	if (!ret && size && nelems)
+		err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
+	return ret;
+}
+
+static inline
+__attribute__((warn_unused_result))
+__ul_returns_nonnull
+char *xstrdup(const char *str)
+{
+	char *ret;
+
+	assert(str);
+	ret = strdup(str);
+	if (!ret)
+		err(XALLOC_EXIT_CODE, "cannot duplicate string");
+	return ret;
+}
+
+static inline
+__attribute__((warn_unused_result))
+__ul_returns_nonnull
+char *xstrndup(const char *str, size_t size)
+{
+	char *ret;
+
+	assert(str);
+	ret = strndup(str, size);
+	if (!ret)
+		err(XALLOC_EXIT_CODE, "cannot duplicate string");
+	return ret;
+}
+
+
+static inline
+__attribute__((__format__(printf, 2, 3)))
+int xasprintf(char **strp, const char *fmt, ...)
+{
+	int ret;
+	va_list args;
+
+	va_start(args, fmt);
+	ret = vasprintf(&(*strp), fmt, args);
+	va_end(args);
+	if (ret < 0)
+		err(XALLOC_EXIT_CODE, "cannot allocate string");
+	return ret;
+}
+
+static inline
+__attribute__((__format__(printf, 2, 0)))
+int xvasprintf(char **strp, const char *fmt, va_list ap)
+{
+	int ret = vasprintf(&(*strp), fmt, ap);
+
+	if (ret < 0)
+		err(XALLOC_EXIT_CODE, "cannot allocate string");
+	return ret;
+}
+
+
+static inline
+__attribute__((warn_unused_result))
+char *xgethostname(void)
+{
+	char *name;
+	size_t sz = get_hostname_max() + 1;
+
+	name = xmalloc(sizeof(char) * sz);
+	if (gethostname(name, sz) != 0) {
+		free(name);
+		return NULL;
+	}
+	name[sz - 1] = '\0';
+	return name;
+}
+
+#endif