string helper api's: added ntapi_tt_uintptr_to_dec{_null}_utf{8|16}().

1 files changed, 148 insertions, 0 deletions

diff --git a/src/string/ntapi_tt_uintptr_to_dec.c b/src/string/ntapi_tt_uintptr_to_dec.c
new file mode 100644
index 0000000..c496247
--- /dev/null
+++ b/src/string/ntapi_tt_uintptr_to_dec.c
@@ -0,0 +1,148 @@
+/********************************************************/
+/*  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 void __tt_uintptr_to_mirrored_dec_utf8(
+	uintptr_t	key,
+	unsigned char *	buf,
+	ssize_t *	arrlen)
+{
+	unsigned i;
+
+	buf[0] = '0' + (key % 10);
+	key   /= 10;
+
+	for (i=1; key; i++) {
+		buf[i] = '0' + (key % 10);
+		key   /= 10;
+	}
+
+	*arrlen = i;
+}
+
+static int32_t __tt_uintptr_to_dec_utf16(
+	uintptr_t	key,
+	wchar16_t *	wstrbuf,
+	size_t		buflen,
+	ssize_t *	arrlen)
+{
+	ssize_t		i;
+	ssize_t		slen;
+	unsigned char	buf[24];
+
+	__tt_uintptr_to_mirrored_dec_utf8(
+		key,buf,arrlen);
+
+	if ((i = *arrlen) > (slen = buflen))
+		return NT_STATUS_BUFFER_TOO_SMALL;
+
+	for (--i; i>=0; i--)
+		*wstrbuf++ = buf[i];
+
+	return NT_STATUS_SUCCESS;
+}
+
+static int32_t __tt_uintptr_to_dec_utf8(
+	uintptr_t	key,
+	unsigned char *	strbuf,
+	size_t		buflen,
+	ssize_t *	arrlen)
+{
+	ssize_t		i;
+	ssize_t		slen;
+	unsigned char	buf[24];
+
+	__tt_uintptr_to_mirrored_dec_utf8(
+		key,buf,arrlen);
+
+	if ((i = *arrlen) > (slen = buflen))
+		return NT_STATUS_BUFFER_TOO_SMALL;
+
+	for (--i; i>=0; i--)
+		*strbuf++ = buf[i];
+
+	return NT_STATUS_SUCCESS;
+}
+
+int32_t __stdcall __ntapi_tt_uintptr_to_dec_utf16(
+	__in	uintptr_t	key,
+	__out	wchar16_t *	wstrbuf,
+	__in	size_t		buflen,
+	__out	ssize_t *	length)
+{
+	int32_t status;
+	ssize_t	arrlen;
+
+	buflen /= sizeof(wchar16_t);
+
+	status = __tt_uintptr_to_dec_utf16(
+		key,wstrbuf,
+		buflen,&arrlen);
+
+	*length = arrlen * sizeof(wchar16_t);
+
+	return status;
+}
+
+int32_t __stdcall __ntapi_tt_uintptr_to_dec_utf8(
+	__in	uintptr_t	key,
+	__out	unsigned char *	strbuf,
+	__in	size_t		buflen,
+	__out	ssize_t *	length)
+{
+	return __tt_uintptr_to_dec_utf8(
+		key,strbuf,
+		buflen,length);
+}
+
+
+int32_t __stdcall __ntapi_tt_uintptr_to_dec_null_utf16(
+	__in	uintptr_t	key,
+	__out	wchar16_t *	wstrbuf,
+	__in	size_t		buflen,
+	__out	ssize_t *	length)
+{
+	int32_t status;
+	ssize_t	arrlen;
+
+	buflen -= sizeof(wchar16_t);
+	buflen /= sizeof(wchar16_t);
+
+	status = __tt_uintptr_to_dec_utf16(
+		key,wstrbuf,
+		buflen,&arrlen);
+
+	if (status == NT_STATUS_SUCCESS)
+		wstrbuf[arrlen] = 0;
+
+	*length = ++arrlen * sizeof(wchar16_t);
+
+	return status;
+}
+
+
+int32_t __stdcall __ntapi_tt_uintptr_to_dec_null_utf8(
+	__in	uintptr_t	key,
+	__out	unsigned char *	strbuf,
+	__in	size_t		buflen,
+	__out	ssize_t *	length)
+{
+	int32_t status;
+	ssize_t	arrlen;
+
+	status = __tt_uintptr_to_dec_utf8(
+		key,strbuf,
+		--buflen,&arrlen);
+
+	if (status == NT_STATUS_SUCCESS)
+		strbuf[arrlen] = 0;
+
+	*length = ++arrlen;
+
+	return status;
+}