From 964eed7331c807e553ec42637151fda21b5495d9 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Jun 28 2016 23:46:40 +0000
Subject: string functions: added __ntapi_tt_strncmp_multibyte().


---

diff --git a/include/ntapi/nt_string.h b/include/ntapi/nt_string.h
index 241bb37..d5ad05d 100644
--- a/include/ntapi/nt_string.h
+++ b/include/ntapi/nt_string.h
@@ -51,6 +51,11 @@ typedef int    __cdecl ntapi_tt_strcmp_utf16(
 	__in	const wchar16_t * a,
 	__in	const wchar16_t * b);
 
+typedef int    __cdecl ntapi_tt_strncmp_multibyte(
+	__in	const char *	a,
+	__in	const char *	b,
+	__in	size_t		n);
+
 typedef void __cdecl		ntapi_tt_init_unicode_string_from_utf16(
 	__out 	nt_unicode_string *	str_dest,
 	__in	wchar16_t *		str_src);
diff --git a/include/ntapi/ntapi.h b/include/ntapi/ntapi.h
index 723ee9c..770b9d6 100644
--- a/include/ntapi/ntapi.h
+++ b/include/ntapi/ntapi.h
@@ -402,6 +402,7 @@ typedef struct _ntapi_vtbl {
 	ntapi_tt_string_null_offset_ptrsize *		tt_string_null_offset_ptrsize;
 	ntapi_tt_strcmp_multibyte *			tt_strcmp_multibyte;
 	ntapi_tt_strcmp_utf16 *				tt_strcmp_utf16;
+	ntapi_tt_strncmp_multibyte *			tt_strncmp_multibyte;
 	ntapi_tt_aligned_block_memset *			tt_aligned_block_memset;
 	ntapi_tt_aligned_block_memcpy *			tt_aligned_block_memcpy;
 	ntapi_tt_aligned_memcpy_utf16 *			tt_aligned_memcpy_utf16;
diff --git a/project/common.mk b/project/common.mk
index 7e2b832..bbeb2fc 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -76,6 +76,7 @@ COMMON_SRCS = \
 	src/string/ntapi_tt_strcmp_multibyte.c \
 	src/string/ntapi_tt_strcmp_utf16.c \
 	src/string/ntapi_tt_string_null_offset.c \
+	src/string/ntapi_tt_strncmp_multibyte.c \
 	src/string/ntapi_tt_uintptr_to_hex_utf16.c \
 	src/string/ntapi_tt_uintptr_to_hex_utf8.c \
 	src/sync/ntapi_tt_create_event.c \
diff --git a/src/internal/ntapi.c b/src/internal/ntapi.c
index f053431..c71aeb5 100644
--- a/src/internal/ntapi.c
+++ b/src/internal/ntapi.c
@@ -169,6 +169,7 @@ static int32_t __fastcall __ntapi_init_once(ntapi_vtbl ** pvtbl)
 	__ntapi->tt_string_null_offset_ptrsize			= __ntapi_tt_string_null_offset_ptrsize;
 	__ntapi->tt_strcmp_multibyte				= __ntapi_tt_strcmp_multibyte;
 	__ntapi->tt_strcmp_utf16				= __ntapi_tt_strcmp_utf16;
+	__ntapi->tt_strncmp_multibyte				= __ntapi_tt_strncmp_multibyte;
 	__ntapi->strlen						= __ntapi_tt_string_null_offset_multibyte;
 	__ntapi->wcslen						= __ntapi_wcslen;
 	__ntapi->tt_aligned_block_memset 			= __ntapi_tt_aligned_block_memset;
diff --git a/src/internal/ntapi_fnapi.h b/src/internal/ntapi_fnapi.h
index d752e70..684f12a 100644
--- a/src/internal/ntapi_fnapi.h
+++ b/src/internal/ntapi_fnapi.h
@@ -55,6 +55,7 @@ ntapi_tt_string_null_offset_qword		__ntapi_tt_string_null_offset_qword;
 ntapi_tt_string_null_offset_ptrsize		__ntapi_tt_string_null_offset_ptrsize;
 ntapi_tt_strcmp_multibyte			__ntapi_tt_strcmp_multibyte;
 ntapi_tt_strcmp_utf16				__ntapi_tt_strcmp_utf16;
+ntapi_tt_strncmp_multibyte			__ntapi_tt_strncmp_multibyte;
 ntapi_wcslen					__ntapi_wcslen;
 ntapi_tt_aligned_block_memset			__ntapi_tt_aligned_block_memset;
 ntapi_tt_aligned_block_memcpy			__ntapi_tt_aligned_block_memcpy;
diff --git a/src/string/ntapi_tt_strncmp_multibyte.c b/src/string/ntapi_tt_strncmp_multibyte.c
new file mode 100644
index 0000000..d66865d
--- /dev/null
+++ b/src/string/ntapi_tt_strncmp_multibyte.c
@@ -0,0 +1,22 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2016  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_string.h>
+
+int __cdecl __ntapi_tt_strncmp_multibyte(
+	__in	const char *	a,
+	__in	const char *	b,
+	__in	size_t		n)
+{
+	if (n == 0)
+		return 0;
+
+	for (--n; n && (*a == *b) && *a; a++, b++)
+		n--;
+
+	return (int)*a - (int)*b;
+}