1 files changed, 95 insertions, 0 deletions
diff --git a/src/nc-util.h b/src/nc-util.h
new file mode 100644
index 0000000..dd319c7
--- /dev/null
+++ b/src/nc-util.h
@@ -0,0 +1,95 @@
+
+/*
+* Copyright (c) 2024 Vaughn Nugent
+*
+* Package: noscrypt
+* File: nc-util.h
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public License
+* as published by the Free Software Foundation; either version 2.1
+* of the License, or  (at your option) any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public License
+* along with noscrypt. If not, see http://www.gnu.org/licenses/.
+*/
+
+#pragma once
+
+#ifndef _NC_UTIL_H
+#define _NC_UTIL_H
+
+#include <platform.h>
+
+/* NULL */
+#ifndef NULL
+	#define NULL ((void*)0)
+#endif /*  !NULL */
+
+#ifdef DEBUG
+	/* Must include assert.h for assertions */
+	#include <assert.h> 
+	#define DEBUG_ASSERT(x) assert(x);
+	#define DEBUG_ASSERT2(x, message) assert(x && message);	
+
+	/*
+	* Compiler enabled static assertion keywords are 
+	* only available in C11 and later. Later versions 
+	* have macros built-in from assert.h so we can use
+	* the static_assert macro directly.
+	* 
+	* Static assertions are only used for testing such as 
+	* sanity checks and this library targets the c89 standard
+	* so static_assret very likely will not be available. 
+	*/
+	#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+		#define STATIC_ASSERT(x, m) static_assert(x, m);
+	#elif !defined(STATIC_ASSERT)
+		#define STATIC_ASSERT(x, m)
+		#pragma message("Static assertions are not supported by this language version")
+	#endif
+
+#else
+	#define DEBUG_ASSERT(x)
+	#define DEBUG_ASSERT2(x, message)
+	#define STATIC_ASSERT(x, m)
+#endif
+
+#include <stdint.h>
+
+#if SIZE_MAX < UINT32_MAX
+	#define _overflow_check(x) if(x > SIZE_MAX) return CSTATUS_FAIL;
+#else
+	#define _overflow_check(x)
+#endif
+
+typedef struct memory_span_struct
+{
+	uint8_t* data;
+	uint32_t size;
+} span_t;
+
+typedef struct read_only_memory_span_struct
+{
+	const uint8_t* data;
+	uint32_t size;
+} cspan_t;
+
+static _nc_fn_inline void ncSpanInitC(cspan_t* span, const uint8_t* data, uint32_t size)
+{
+	span->data = data;
+	span->size = size;
+}
+
+static _nc_fn_inline void ncSpanInit(span_t* span, uint8_t* data, uint32_t size)
+{
+	span->data = data;
+	span->size = size;
+}
+
+#endif /* !_NC_UTIL_H */
+\ No newline at end of file