string helper api's: added ntapi_tt_dec_utf16_to_uint{16|32|64|ptr}().

1 files changed, 126 insertions, 0 deletions

diff --git a/src/string/ntapi_tt_dec_utf16_to_uintptr.c b/src/string/ntapi_tt_dec_utf16_to_uintptr.c
new file mode 100644
index 0000000..93f0967
--- /dev/null
+++ b/src/string/ntapi_tt_dec_utf16_to_uintptr.c
@@ -0,0 +1,126 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2018  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_status.h>
+
+static int32_t __tt_dec_utf16_to_uint64(
+	__in	const wchar16_t *	wch_arg,
+	__in	const wchar16_t *	wch_cap,
+	__out	uint64_t *		key)
+{
+	int32_t			status;
+	uint64_t		lkey;
+	uint64_t		hkey;
+	const wchar16_t *	wch;
+
+	if (wch_cap <= wch_arg)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (wch_cap - wch_arg > 20)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	lkey = 0;
+	hkey = 0;
+
+	if (wch_cap - wch_arg == 20) {
+		if ((status = __tt_dec_utf16_to_uint64(
+				&wch_arg[6],wch_cap,
+				&hkey)))
+			return status;
+
+		if (hkey > 18446744073709)
+			return NT_STATUS_INTEGER_OVERFLOW;
+
+		hkey   *= 1000000;
+		wch_cap = &wch_arg[6];
+	}
+
+	for (wch=wch_arg; wch<wch_cap; wch++) {
+		if ((*wch < '0') || (*wch > '9'))
+			return NT_STATUS_INVALID_PARAMETER;
+
+		lkey *= 10;
+		lkey += *wch - '0';
+	}
+
+	*key = lkey + hkey;
+
+	return NT_STATUS_SUCCESS;
+}
+
+int32_t __stdcall __ntapi_tt_dec_utf16_to_uint16(
+	__in	const wchar16_t *	wch_arg,
+	__in	const wchar16_t *	wch_cap,
+	__out	uint16_t *		key)
+{
+	int32_t		status;
+	uint64_t	skey;
+	uint16_t	rkey;
+
+	if ((status = __tt_dec_utf16_to_uint64(wch_arg,wch_cap,&skey)))
+		return status;
+
+	if ((rkey = skey) < skey)
+		return NT_STATUS_INTEGER_OVERFLOW;
+
+	*key = rkey;
+
+	return NT_STATUS_SUCCESS;
+}
+
+int32_t __stdcall __ntapi_tt_dec_utf16_to_uint32(
+	__in	const wchar16_t *	wch_arg,
+	__in	const wchar16_t *	wch_cap,
+	__out	uint32_t *		key)
+{
+	int32_t		status;
+	uint64_t	skey;
+	uint32_t	rkey;
+
+	if ((status = __tt_dec_utf16_to_uint64(wch_arg,wch_cap,&skey)))
+		return status;
+
+	if ((rkey = skey) < skey)
+		return NT_STATUS_INTEGER_OVERFLOW;
+
+	*key = rkey;
+
+	return NT_STATUS_SUCCESS;
+}
+
+
+
+int32_t __stdcall __ntapi_tt_dec_utf16_to_uint64(
+	__in	const wchar16_t *	wch_arg,
+	__in	const wchar16_t *	wch_cap,
+	__out	uint64_t *		key)
+{
+	return __tt_dec_utf16_to_uint64(
+		wch_arg,wch_cap,key);
+}
+
+#ifdef __NT32
+int32_t __stdcall __ntapi_tt_dec_utf16_to_uintptr(
+	__in	const wchar16_t *	wch_arg,
+	__in	const wchar16_t *	wch_cap,
+	__out	uintptr_t *		key)
+{
+	return __tt_dec_utf16_to_uint32(
+		wch_arg,wch_cap,key);
+}
+#endif
+
+#ifdef __NT64
+int32_t __stdcall __ntapi_tt_dec_utf16_to_uintptr(
+	__in	const wchar16_t *	wch_arg,
+	__in	const wchar16_t *	wch_cap,
+	__out	uintptr_t *		key)
+{
+	return __tt_dec_utf16_to_uint64(
+		wch_arg,wch_cap,key);
+}
+#endif