1 files changed, 185 insertions, 0 deletions
diff --git a/src/coreboot-string.c b/src/coreboot-string.c
new file mode 100644
index 0000000..88b5efa
--- /dev/null
+++ b/src/coreboot-string.c
@@ -0,0 +1,185 @@
+/* -------------------------------------------
+
+    Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+/**
+ * @file coreboot-string.c
+ * @author Amlal EL Mahrouss (amlal@el-mahrouss-logic.com)
+ * @brief string library.
+ * @version 0.1
+ * @date 2024-01-16
+ *
+ * @copyright Copyright (c) 2024 Amlal EL Mahrouss
+ *
+ */
+
+#include <lib/string.h>
+
+/// BUGS: 0
+
+size_t strncmp(const char* src, const char* cmp, size_t size)
+{
+	if (src == nil)
+		return 0;
+
+	int32_t counter = 0;
+
+	for (size_t index = 0; index < size; ++index)
+	{
+		if (src[index] != cmp[index])
+			++counter;
+	}
+
+	return counter;
+}
+
+void* memset(void* ptr, const char value, size_t len)
+{
+	if (ptr == nil)
+		return nil;
+
+	char* start = ptr;
+
+	while (len)
+	{
+		*start = value;
+		++start;
+
+		--len;
+	}
+
+	return (void*)start;
+}
+
+void* memmove(void* dest, const void* src, size_t len)
+{
+	memncpy(dest, src, len);
+	return dest;
+}
+
+size_t memcpy(void* dst, const void* src)
+{
+	if (src == nil || dst == nil)
+		return 0;
+
+	const char* src_chr = src;
+	char*		dst_chr = dst;
+	size_t		index	= 0;
+	size_t		len		= strlen(src);
+
+	while (index < len)
+	{
+		dst_chr[index] = src_chr[index];
+		++index;
+	}
+
+	return 0;
+}
+
+/* @brief unoptimized memcpy, TODO: use isa specific memcpy. */
+size_t memncpy(void* dst, const void* src, size_t len)
+{
+#if __OL == 3 && defined(__riscv)
+	riscv_memncpy(dst, src, len);
+#else
+
+	if (src == nil || dst == nil)
+		return 0;
+
+	const char* src_chr = src;
+	char*		dst_chr = dst;
+	size_t		index	= 0;
+
+	while (index < len)
+	{
+		dst_chr[index] = src_chr[index];
+		++index;
+	}
+
+	return 0;
+#endif
+}
+
+size_t strlen(const char* str)
+{
+	if (*str == 0)
+		return 0;
+
+	size_t len = 0;
+	while (str[len] != '\0')
+		++len;
+
+	return len;
+}
+
+size_t strnlen(const char* str, size_t len)
+{
+	size_t cnt = 0;
+
+	while (len > cnt)
+	{
+		++cnt;
+
+		if (str[cnt] == '\0')
+			return (size_t)-1;
+	}
+
+	return len;
+}
+
+void strreverse(char* s)
+{
+	if (s == nil)
+		return;
+	if (*s == '\0')
+		return;
+
+	char *first, *last, temp;
+
+	first = s;
+	last  = s + strlen(s) - 1;
+
+	while (first != last)
+	{
+		temp	   = *first;
+		*(first++) = *last;
+		*(last--)  = temp;
+	}
+}
+
+char* strchr(char* str, const char chr)
+{
+	while (*str != chr)
+	{
+		++str;
+
+		if (*str == 0)
+			return nil;
+	}
+
+	return str;
+}
+
+/// @brief Compare two strings.
+/// @param src source string
+/// @param cmp string to compare.
+/// @return
+size_t strcmp(caddr_t src, caddr_t cmp)
+{
+	if (src == null || *src == 0)
+		return 1;
+	if (cmp == null || *cmp == 0)
+		return 1;
+
+	int32_t counter = 0;
+
+	for (size_t index = 0; src[index] != 0; ++index)
+	{
+		if (cmp[index] != src[index])
+			++counter;
+	}
+
+	return counter;
+}