ADD: Open version, with important changes kept out.

Signed-off-by: Amlal <amlal.elmahrouss@icloud.com>

1 files changed, 173 insertions, 0 deletions

diff --git a/dev/Boot/BootKit/Support.h b/dev/Boot/BootKit/Support.h
new file mode 100644
index 00000000..a69c4c99
--- /dev/null
+++ b/dev/Boot/BootKit/Support.h
@@ -0,0 +1,173 @@
+/* -------------------------------------------
+
+	Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#pragma once
+
+/// @file Support.h
+/// @brief Purpose of this file is to help port libs into the bootloader.
+
+#ifndef __aarch64__
+#include <string.h>
+#endif
+
+#define kLongMax ((long)(~0UL >> 1))
+#define kLongMin (~kLongMax)
+
+#ifdef __ZBAOSLDR__
+
+/// @brief memset definition in C++.
+/// @param dst destination pointer.
+/// @param byte value to fill in.
+/// @param len length of of src.
+EXTERN_C void* memset(void* dst, int byte, long long unsigned int len);
+
+/// @brief memcpy definition in C++.
+/// @param dst destination pointer.
+/// @param  src source pointer.
+/// @param len length of of src.
+EXTERN_C void* memcpy(void* dst, const void* src, long long unsigned int len);
+
+/// @brief strlen definition in C++.
+EXTERN_C size_t strlen(const char* whatToCheck);
+
+/// @brief strcmp definition in C++.
+EXTERN_C int strcmp(const char* whatToCheck, const char* whatToCheckRight);
+
+#else
+
+#include <string.h>
+
+#endif // __ZBAOSLDR__
+
+#define SetMem(dst, c, sz)	  memset(dst, c, sz)
+#define MoveMem(dst, src, sz) memcpy(dst, src, sz)
+#define CopyMem(dst, src, sz) memcpy(dst, src, sz)
+#define StrLen(src)			  strlen(src)
+#define StrCmp(dst, src)	  strcmp(dst, src)
+
+inline int IsSpace(int c)
+{
+	return c == ' ';
+}
+
+inline int StringNCompare(const char* destination, const char* source, long length)
+{
+	long err = 0;
+
+	for (long i = 0UL; i < length; ++i)
+	{
+		if (source[i] != destination[i])
+			++err;
+	}
+
+	return err;
+}
+
+inline long StringToLong(const char* nptr, char** endptr, int base)
+{
+	const char *p	   = nptr, *endp;
+	bool		is_neg = 0, overflow = 0;
+
+	/* Need unsigned so (-kLongMin) can fit in these: */
+	unsigned long n = 0UL, cutoff;
+	int			  cutlim;
+
+	if (base < 0 || base == 1 || base > 36)
+	{
+		return 0L;
+	}
+
+	endp = nptr;
+
+	while (IsSpace(*p))
+		p++;
+
+	if (*p == '+')
+	{
+		p++;
+	}
+	else if (*p == '-')
+	{
+		is_neg = 1, p++;
+	}
+	if (*p == '0')
+	{
+		p++;
+		/* For strtol(" 0xZ", &endptr, 16), endptr should point to 'x';
+		 * pointing to ' ' or '0' is non-compliant.
+		 * (Many implementations do this wrong.) */
+		endp = p;
+		if (base == 16 && (*p == 'X' || *p == 'x'))
+		{
+			p++;
+		}
+		else if (base == 2 && (*p == 'B' || *p == 'b'))
+		{
+			/* C23 standard supports "0B" and "0b" prefixes. */
+			p++;
+		}
+		else if (base == 0)
+		{
+			if (*p == 'X' || *p == 'x')
+			{
+				base = 16, p++;
+			}
+			else if (*p == 'B' || *p == 'b')
+			{
+				base = 2, p++;
+			}
+			else
+			{
+				base = 8;
+			}
+		}
+	}
+	else if (base == 0)
+	{
+		base = 10;
+	}
+
+	cutoff = (is_neg) ? -(kLongMin / base) : kLongMax / base;
+	cutlim = (is_neg) ? -(kLongMin % base) : kLongMax % base;
+
+	while (1)
+	{
+		int c;
+		if (*p >= 'A')
+			c = ((*p - 'A') & (~('a' ^ 'A'))) + 10;
+		else if (*p <= '9')
+			c = *p - '0';
+		else
+			break;
+		if (c < 0 || c >= base)
+			break;
+		endp = ++p;
+		if (overflow)
+		{
+			/* endptr should go forward and point to the non-digit character
+			 * (of the given base); required by ANSI standard. */
+			if (endptr)
+				continue;
+			break;
+		}
+		if (n > cutoff || (n == cutoff && c > cutlim))
+		{
+			overflow = 1;
+			continue;
+		}
+		n = n * base + c;
+	}
+
+	if (endptr)
+		*endptr = (char*)endp;
+
+	if (overflow)
+	{
+		return ((is_neg) ? kLongMin : kLongMax);
+	}
+
+	return (long)((is_neg) ? -n : n);
+}