Blame src/argv/ntapi_tt_argv_envp.c

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/********************************************************/
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/*  ntapi: Native API core library                      */
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/*  Copyright (C) 2013--2016  Z. Gilboa                 */
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/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
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/********************************************************/
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#include <psxtypes/psxtypes.h>
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#include <pemagine/pemagine.h>
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#include <ntapi/ntapi.h>
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#include "ntapi_impl.h"
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/**
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 *  rules for parsing the process's command line arguments
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 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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 *
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 *  delimiters:
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 *  -----------
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 *  + white space    (ascii 0x20)
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 *  + horizontal tab (ascii 0x09)
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 *
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 *  quoted strings, and special characters
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 *  --------------------------------------
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 *  + delimiter characters within a quoted string ("string with white space",
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 *    or string" with white "space), stand for their literal respective
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 *    characters.
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 *
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 *  + a backslash followed by a double quote (\") stands for a literal
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 *    double quote.
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 *
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 *  + unless followed by a double quote, a backslash is just a (literal)
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 *    backslash.
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 *
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 *  + when followed by a double quotation mark, an even sequence of 2 or
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 *    more backslashes (2n) should be interpreted as a sequence of n literal
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 *    backslashes.  The double quotation mark then designates the start
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 *    or end of a double quoted string.
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 *
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 *  + when followed by a double quotation mark, an odd sequence of 2 or
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 *    more backslashes (2n+1) should be interpreted as a sequence of n
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 *    literal backslashes, followed by a single literal double quote.
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 *
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 *  + if found within a double quoted string, a sequence of two double
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 *    quotation marks should be interpreted as a single literal double
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 *    quote.
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 *
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 *  +  balanced nesting of syntactic double quotes is permitted.
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 *
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**/
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/* free-standing process runtime data */
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static nt_runtime_data	__rtdata;
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int32_t __stdcall __ntapi_tt_parse_cmd_line_args_utf16(
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	__in	wchar16_t *	cmd_line,
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	__out	int *		arg_count,
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	__in	wchar16_t *	args_buffer,
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	__in	size_t		args_buffer_len,
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	__out	size_t *	args_bytes_written __optional,
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	__in	wchar16_t **	argv_buffer,
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	__in	size_t		argv_buffer_len,
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	__in	uint32_t	arg_flags)
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{
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	/**
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	  * parse the command line arguments pointed to by cmd_line,
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	  * copy the parsed arguments to args_buffer,
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	  * and return 0 upon success.
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	  *
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	  * cmd_line must be a valid pointer to a command line string,
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	  * and args_buffer, argv_buffer, and arg_count should
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	  * all be aligned; furthermore, args_buffer_len and
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	  * and argv_buffer_len must be exact multiples of sizeof(size_t).
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	  *
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	  * In case of an error, report failure using the appropriate
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	  * native status code.
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	**/
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	/**
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	 *  UTF-16: no need to fully determine the code point of the
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	 *  current character; all we need to do is validate the
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	 *  character or surrogate pair, and set the value of
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	 *  wch_next accordingly.
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	**/
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	#define HORIZONTAL_TAB	0x09
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	#define WHITE_SPACE	0x20
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	#define DOUBLE_QUOTE	0x22
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	#define SINGLE_QUOTE	0x27
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	#define BACKSLASH	0x5C
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	#define IS_DELIMITER(x)	((x == HORIZONTAL_TAB) || (x == WHITE_SPACE))
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	#define TEST_ARGS_BUFFER(nbytes) \
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				if ((uintptr_t)arg + nbytes \
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						> (uintptr_t)args_buffer + args_buffer_len) { \
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					return NT_STATUS_BUFFER_TOO_SMALL; \
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				}
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	#define ADD_N_BACKSLASHES \
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				TEST_ARGS_BUFFER(backslash_count * sizeof(wchar16_t)); \
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				for (islash = 0; \
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						islash < backslash_count; \
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						islash++) { \
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					*arg = BACKSLASH; \
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					arg++; \
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				} \
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				backslash_count = 0;
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	#define ADD_SINGLE_WCHAR16_t(x) \
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				TEST_ARGS_BUFFER(sizeof(wchar16_t)); \
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				*arg = x; \
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				arg++;
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	wchar16_t *	arg;		/* null-terminated, copied to buffer */
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	wchar16_t **	parg;		/* next pointer in the argv array */
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	wchar16_t *	wch;		/* character being processed */
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	wchar16_t *	wch_next;
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	unsigned int	backslash_count;
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	unsigned int	islash;
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	unsigned char	quoted_state;
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	/* unused param */
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	(void)arg_flags;
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	/* check parameters for validity and alignment */
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	if ((!(uintptr_t)cmd_line) || (*cmd_line == 0))
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		/* we require at least one argument */
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		return NT_STATUS_INVALID_PARAMETER_1;
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	else if (__NT_IS_MISALIGNED_BUFFER(args_buffer))
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		return NT_STATUS_INVALID_PARAMETER_2;
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	else if (__NT_IS_MISALIGNED_LENGTH(args_buffer_len))
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		return NT_STATUS_INVALID_PARAMETER_3;
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	else if (__NT_IS_MISALIGNED_BUFFER(argv_buffer))
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		return NT_STATUS_INVALID_PARAMETER_5;
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	else if (__NT_IS_MISALIGNED_LENGTH(argv_buffer_len))
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		return NT_STATUS_INVALID_PARAMETER_6;
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	else if (__NT_IS_MISALIGNED_BUFFER(arg_count))
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		return NT_STATUS_INVALID_PARAMETER_7;
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	/* zero-out the aligned buffers */
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	__ntapi->tt_aligned_block_memset(args_buffer,0,args_buffer_len);
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	__ntapi->tt_aligned_block_memset(argv_buffer,0,argv_buffer_len);
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	/* initialize */
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	wch		= cmd_line;
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	arg		= args_buffer;
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	parg		= argv_buffer;
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	*parg		= arg;
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	*arg_count	= 0;
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	quoted_state	= 0;
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	backslash_count	= 0;
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	/* arg points to the first character of a command line argument */
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	/* parg points to the next pointer in argv_buffer */
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	while (*wch) {
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		if (!(quoted_state) && (IS_DELIMITER(*wch))) {
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			/* pending backslashes? */
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			if (backslash_count)
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				ADD_N_BACKSLASHES;
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			/* reached a delimiter outside of a quoted string */
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			/* argument: alignment and null-termination */
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			arg = (wchar16_t *)((((uintptr_t)arg + sizeof(size_t))
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					| (sizeof(size_t) - 1))
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					^ (sizeof(size_t) - 1));
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			/* skip this and remaining delimiters */
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			wch_next = wch + 1;
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			while ((*wch_next) && (IS_DELIMITER(*wch_next)))
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				wch_next++;
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			/* keep going? */
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			if (*wch_next == 0) {
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				/* no more characters to process */
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				/* nothing to do */
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			} else if ((uintptr_t)parg >= \
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					(uintptr_t)argv_buffer \
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					+ argv_buffer_len) {
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				/* argv_buffer is too small */
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				return NT_STATUS_BUFFER_TOO_SMALL;
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			} else if ((uintptr_t)arg >= \
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					(uintptr_t)args_buffer \
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					+ args_buffer_len) {
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				/* args_buffer is too small */
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				return NT_STATUS_BUFFER_TOO_SMALL;
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			} else {
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				/* advance parg, set last member  */
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				parg++;
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				*parg = arg;
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			}
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		} else {
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			/* the current character is not a delimiter... */
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			/* determine wch_next */
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			if ((*wch < 0xD800) || (*wch >= 0xE000)) {
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				/* in the BMP, single 16-bit representation */
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				wch_next = wch + 1;
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			} else if ((*wch >= 0xD800) && (*wch < 0xDC00)) {
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				/* validate surrogate pair */
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				wch_next = wch + 1;
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				if ((*wch_next >= 0xDC00) && (*wch_next < 0xE000))
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					/* this is a valid surrogate pair */
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					wch_next++;
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				else
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					return NT_STATUS_ILLEGAL_CHARACTER;
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			} else
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				return NT_STATUS_ILLEGAL_CHARACTER;
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			/* we now know the position of this and the next character */
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			/* continue with special cases */
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			if (quoted_state && (*wch == DOUBLE_QUOTE) \
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					&& (*wch_next == DOUBLE_QUOTE)) {
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				/**
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				 *  two consecutive double quotation marks
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				 *  within a quoted string:
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				 *  add a single quotation mark to the argument
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				**/
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				ADD_SINGLE_WCHAR16_t(DOUBLE_QUOTE);
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				wch_next++;
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			} else if (((backslash_count % 2) == 0) \
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					&& (*wch == BACKSLASH) \
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					&& (*wch_next == DOUBLE_QUOTE)) {
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				/* 2n+1 backslashes followed by a double quote */
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				backslash_count /= 2;
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				/* add n backslashes */
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				ADD_N_BACKSLASHES;
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				/* add a literal double quotation mark */
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				ADD_SINGLE_WCHAR16_t(DOUBLE_QUOTE);
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				/* get ready for next character */
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				wch_next++;
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			} else if (backslash_count && (*wch == DOUBLE_QUOTE)) {
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				/* 2n backslashes followed by a double quote */
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				backslash_count /= 2;
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				/* add n backslashes */
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				ADD_N_BACKSLASHES;
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				/* turn quoted_state on/off */
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				quoted_state = !quoted_state;
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			} else if ((*wch == BACKSLASH) \
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						&& (*wch_next == BACKSLASH)) {
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				/* this is a sequence of two backslashes */
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				backslash_count += 2;
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				wch_next++;
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			} else {
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				/* copy pending backslashes as needed */
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				if (backslash_count)
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					ADD_N_BACKSLASHES;
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				if (*wch == DOUBLE_QUOTE) {
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					/* turn quoted_state on/off */
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					quoted_state = !quoted_state;
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				} else {
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					/* copy either two or four bytes */
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					ADD_SINGLE_WCHAR16_t(*wch);
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					wch++;
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					/* surrogate pair? */
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					if (wch < wch_next) {
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						ADD_SINGLE_WCHAR16_t(*wch);
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					}
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				}
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			}
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		}
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		/* proceed to the next character (or null termination) */
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		wch = wch_next;
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	}
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	/* pending backslashes? */
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	if (backslash_count)
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		ADD_N_BACKSLASHES;
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	/* null termination */
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	ADD_SINGLE_WCHAR16_t(0);
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	/* how many arguments did you say? */
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	*arg_count = (int)(((uintptr_t)parg - (uintptr_t)argv_buffer)
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				/ sizeof(size_t) + 1);
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	/* output bytes written */
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	if (args_bytes_written)
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		*args_bytes_written = (uintptr_t)arg - (uintptr_t)args_buffer;
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	return NT_STATUS_SUCCESS;
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}
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int32_t __stdcall __ntapi_tt_get_argv_envp_utf16(
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	__out	int *		argc,
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	__out	wchar16_t ***	wargv,
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	__out	wchar16_t ***	wenvp,
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	__in	uint32_t	flags,
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	__in	void *		ext_params	__optional,
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	__out	void *		reserved	__optional)
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{
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	nt_runtime_data *		rtdata;
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	nt_argv_envp_block_info		main_params_internal;
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	nt_argv_envp_block_info *	main_params;
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	nt_get_argv_envp_ext_params *	__ext_params;
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	ntapi_internals *		__internals;
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	unsigned	idx;
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	int32_t		status;
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	uintptr_t	addr;
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	intptr_t	offset;
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	wchar16_t *	wch_s;
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	wchar16_t *	wch_dst;
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	wchar16_t **	wch_p;
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	char **		ch_p;
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	uintptr_t *	psrc;
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	uintptr_t *	pdst;
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	uintptr_t *	paligned;
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	wchar16_t *	pboundary;
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	/* unused param */
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	(void)reserved;
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	/* init */
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	__internals = __ntapi_internals();
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	/* use internal buffer? */
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	if (flags & NT_GET_ARGV_ENVP_USE_CALLER_BUFFER) {
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		__ext_params = (nt_get_argv_envp_ext_params *)ext_params;
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		main_params  = &(__ext_params->argv_envp_block_info);
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	} else {
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		/* pointers to internal/local structures */
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		main_params = &main_params_internal;
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		/* init */
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		__ntapi->tt_aligned_block_memset(
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			main_params,0,
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			sizeof(*main_params));
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		/* use internal buffer */
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		main_params->cmd_line		 = __ntapi_tt_get_cmd_line_utf16();
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		main_params->wargv_buffer	 = __internals->ntapi_img_sec_bss->argv_envp_array;
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		main_params->wargv_buffer_len	 = __NT_BSS_ARGV_BUFFER_SIZE;
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		main_params->argv_envp_ptr_total	 = (int)(main_params->wargv_buffer_len
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							/ sizeof(uintptr_t));
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		main_params->wargs_buffer	 = (wchar16_t *)&(__internals->ntapi_img_sec_bss->args_envs_buffer);
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		main_params->wargs_buffer_len	 = __NT_BSS_ARGS_BUFFER_SIZE;
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	}
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	/* (__ntapi_parse_cmd_line_args_utf16 will zero-out both buffers) */
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	status = __ntapi_tt_parse_cmd_line_args_utf16(
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		main_params->cmd_line,
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		&main_params->argc,
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		main_params->wargs_buffer,
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		main_params->wargs_buffer_len,
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		&main_params->wargs_bytes_written,
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		main_params->wargv_buffer,
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		main_params->wargv_buffer_len,
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		0);
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	if (status) return status;
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	/* argv[] needs a terminating null pointer */
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	if (main_params->argc == main_params->argv_envp_ptr_total)
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		return NT_STATUS_BUFFER_TOO_SMALL;
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	/* set idx to the envp[0] array index */
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	idx = main_params->argc + 1;
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	/* set wenvp[] to its starting address */
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	main_params->wenvp_buffer = &main_params->wargv_buffer[idx];
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	/* update wargv_buffer_len and envp_buffer_len */
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	main_params->wenvp_buffer_len = main_params->wargv_buffer_len
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					- (idx * sizeof(uintptr_t));
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	main_params->wargv_buffer_len = idx * sizeof(uintptr_t);
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	/* align wenvs at pointer-size boundary */
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	main_params->wargs_bytes_written += sizeof(uintptr_t) - 1;
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	main_params->wargs_bytes_written /= sizeof(uintptr_t);
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	main_params->wargs_bytes_written *= sizeof(uintptr_t);
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	/* book-keeping */
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	main_params->wenvs_buffer  = main_params->wargs_buffer
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					+ main_params->wargs_bytes_written;
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	main_params->wenvs_buffer_len = main_params->wargs_buffer_len 
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					- main_params->wargs_bytes_written;
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	main_params->wargs_buffer_len = main_params->wargs_bytes_written;
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	/* peb environment block (read-only) */
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	wch_s = __ntapi_tt_get_peb_env_block_utf16();
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	if ((!wch_s) || (!*wch_s))
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		return NT_STATUS_DLL_INIT_FAILED;
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	/* populate the envp[] array */
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	while ((*wch_s) && (idx < main_params->argv_envp_ptr_total)) {
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		main_params->envc++;
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		wch_p = &(main_params->wargv_buffer[idx]);
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		*wch_p = wch_s;
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		/* skip the rest of the environment variable */
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		while (*++wch_s);
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		/* advance to the next variable (or final null termination) */
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		wch_s++;
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		idx++;
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	}
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	/* envp[] needs a terminating null pointer */
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	if ((*wch_s) && (idx = main_params->argv_envp_ptr_total))
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		return NT_STATUS_BUFFER_TOO_SMALL;
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	/* copy environment? */
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	if (flags & NT_GET_ARGV_ENVP_COPY_ENVIRONMENT) {
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		/* wch_s now points at the final null termination */
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		main_params->wenvs_bytes_used =
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				((uintptr_t)wch_s
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				- (uintptr_t)(*main_params->wenvp_buffer));
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		/* do we have enough room? */
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		if (main_params->wenvs_buffer_len < main_params->wenvs_bytes_used)
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			return NT_STATUS_BUFFER_TOO_SMALL;
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		/* upper boundary */
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		pboundary = ++wch_s;
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		/* you'd expect the peb environment block to be aligned, 
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		   but one can never know... */
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		wch_s 	= *main_params->wenvp_buffer;
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		wch_dst = main_params->wenvs_buffer;
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		while ((uintptr_t)wch_s % sizeof(uintptr_t)) {
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			*wch_dst = *wch_s;
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			wch_s++;
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			wch_dst++;
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		}
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		/* copy the aligned portion of the environment block */
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		addr = (uintptr_t)(pboundary);
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		addr /= sizeof(uintptr_t);
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		addr *= sizeof(uintptr_t);
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		paligned = (uintptr_t *)addr;
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		psrc = (uintptr_t *)wch_s;
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		pdst = (uintptr_t *)wch_dst;
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		while (psrc < paligned) {
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			*pdst = *psrc;
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			psrc++;
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			pdst++;
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		}
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		/* copy any remaining bytes */
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		wch_s	= (wchar16_t *)paligned;
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		wch_dst	= (wchar16_t *)pdst;
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		while (wch_s < pboundary) {
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			*wch_dst = *wch_s;
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			wch_s++;
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			wch_dst++;
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		}
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		/* finally, we update the envp[] pointers */
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		offset = (intptr_t)main_params->wenvs_buffer
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			- (intptr_t)*main_params->wenvp_buffer;
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		wch_p = main_params->wenvp_buffer;
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		while (*wch_p) {
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			addr = ((uintptr_t)*wch_p) + offset;
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			*wch_p = (wchar16_t *)addr;
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			wch_p++;
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		}
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	}
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	/* (command line arguments always get validated) */
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	/* validate the environment block? */
dd89bb
	if (flags & NT_GET_ARGV_ENVP_VALIDATE_UTF16) {
dd89bb
		wch_p = main_params->wenvp_buffer;
dd89bb
dd89bb
		while (*wch_p) {
dd89bb
			status = __ntapi->uc_validate_unicode_stream_utf16(
dd89bb
				*wch_p,
dd89bb
				0,0,0,0,0);
dd89bb
dd89bb
			if (status != NT_STATUS_SUCCESS)
dd89bb
				return status;
dd89bb
			else
dd89bb
				wch_p++;
dd89bb
		}
dd89bb
	}
dd89bb
dd89bb
	/* once */
dd89bb
	if (!__internals->rtdata) {
dd89bb
		__ntapi->tt_get_runtime_data(
dd89bb
			&__internals->rtdata,
dd89bb
			main_params->wargv_buffer);
dd89bb
dd89bb
		if (!__internals->rtdata) {
dd89bb
			__internals->rtdata = &__rtdata;
dd89bb
dd89bb
			if ((status =__ntapi->tt_init_runtime_data(&__rtdata)))
dd89bb
				return status;
dd89bb
dd89bb
		} else if ((status =__ntapi->tt_update_runtime_data(__internals->rtdata)))
dd89bb
			return status;
dd89bb
dd89bb
		rtdata = __internals->rtdata;
dd89bb
dd89bb
		rtdata->peb_envc  = main_params->envc;
dd89bb
		rtdata->peb_argc	  = main_params->argc;
dd89bb
		rtdata->peb_wargv = main_params->wargv_buffer;
dd89bb
		rtdata->peb_wenvp = main_params->wenvp_buffer;
dd89bb
dd89bb
		/* integral wargv, wenvp, argv, envp */
dd89bb
		if (rtdata->wargv) {
dd89bb
			rtdata->wargv += (uintptr_t)rtdata / sizeof(wchar16_t *);
dd89bb
dd89bb
			for (wch_p=rtdata->wargv; *wch_p; wch_p++)
dd89bb
				*wch_p += (uintptr_t)rtdata / sizeof(wchar16_t);
dd89bb
		};
dd89bb
dd89bb
		if (rtdata->wenvp) {
dd89bb
			rtdata->wenvp += (uintptr_t)rtdata / sizeof(wchar16_t *);
dd89bb
dd89bb
			for (wch_p=rtdata->wenvp; *wch_p; wch_p++)
dd89bb
				*wch_p += (uintptr_t)rtdata / sizeof(wchar16_t);
dd89bb
		}
dd89bb
dd89bb
		if (rtdata->argv) {
dd89bb
			rtdata->argv += (uintptr_t)rtdata / sizeof(char *);
dd89bb
dd89bb
			for (ch_p=rtdata->argv; *ch_p; ch_p++)
dd89bb
				*ch_p += (uintptr_t)rtdata;
dd89bb
dd89bb
			rtdata->argc = (int32_t)(ch_p - rtdata->argv);
dd89bb
		};
dd89bb
dd89bb
		if (rtdata->envp) {
dd89bb
			rtdata->envp += (uintptr_t)rtdata / sizeof(char *);
dd89bb
dd89bb
			for (ch_p=rtdata->envp; *ch_p; ch_p++)
dd89bb
				*ch_p += (uintptr_t)rtdata;
dd89bb
dd89bb
			rtdata->envc = (int32_t)(ch_p - rtdata->envp);
dd89bb
		};
dd89bb
	}
dd89bb
dd89bb
	/* we're good */
dd89bb
	*argc = main_params->argc;
dd89bb
	*wargv = main_params->wargv_buffer;
dd89bb
	*wenvp = main_params->wenvp_buffer;
dd89bb
dd89bb
	return NT_STATUS_SUCCESS;
dd89bb
}
dd89bb
dd89bb
dd89bb
int32_t __stdcall 	__ntapi_tt_get_argv_envp_utf8(
dd89bb
	__out	int *		argc,
dd89bb
	__out	char ***	argv,
dd89bb
	__out	char ***	envp,
dd89bb
	__in	uint32_t	flags,
dd89bb
	__in	void *		ext_params	__optional,
dd89bb
	__out	void *		reserved	__optional)
dd89bb
{
dd89bb
	int32_t			status;
dd89bb
	ntapi_internals *	__internals;
dd89bb
dd89bb
	wchar16_t **	wargv;
dd89bb
	wchar16_t **	wenvp;
dd89bb
	uint32_t	pcount;
dd89bb
dd89bb
	nt_get_argv_envp_ext_params	__ext_params_internal;
dd89bb
	nt_get_argv_envp_ext_params *	__ext_params;
dd89bb
	nt_argv_envp_block_info *	main_params;
dd89bb
dd89bb
	/* use internal buffer? */
dd89bb
	if (flags & NT_GET_ARGV_ENVP_USE_CALLER_BUFFER) {
dd89bb
		__ext_params = (nt_get_argv_envp_ext_params *)ext_params;
dd89bb
		main_params  = &__ext_params->argv_envp_block_info;
dd89bb
	} else {
dd89bb
		/* pointers to internal/local structures */
dd89bb
		__ext_params = &__ext_params_internal;
dd89bb
		main_params  = &__ext_params->argv_envp_block_info;
dd89bb
dd89bb
		/* init */
dd89bb
		__ntapi->tt_aligned_block_memset(
dd89bb
			main_params,0,
dd89bb
			sizeof(*main_params));
dd89bb
dd89bb
		__internals = __ntapi_internals();
dd89bb
dd89bb
		/* use internal buffer */
dd89bb
		main_params->cmd_line		 = __ntapi_tt_get_cmd_line_utf16();
dd89bb
		main_params->wargv_buffer	 = __internals->ntapi_img_sec_bss->argv_envp_array;
dd89bb
		main_params->wargv_buffer_len	 = __NT_BSS_ARGV_BUFFER_SIZE;
dd89bb
		main_params->argv_envp_ptr_total	 = (int)(main_params->wargv_buffer_len
dd89bb
							/ sizeof(uintptr_t));
dd89bb
		main_params->wargs_buffer	 = (wchar16_t *)&(__internals->ntapi_img_sec_bss->args_envs_buffer);
dd89bb
		main_params->wargs_buffer_len	 = __NT_BSS_ARGS_BUFFER_SIZE;
dd89bb
	}
dd89bb
dd89bb
	/* start with obtaining the utf-16 environment */
dd89bb
	status = __ntapi->tt_get_argv_envp_utf16(
dd89bb
		argc,
dd89bb
		&wargv,
dd89bb
		&wenvp,
dd89bb
		flags | NT_GET_ARGV_ENVP_USE_CALLER_BUFFER,
dd89bb
		__ext_params,
dd89bb
		reserved);
dd89bb
dd89bb
	if (status) return status;
dd89bb
dd89bb
	/* enough pointers left? */
dd89bb
	pcount = main_params->argc + 1 + main_params->envc + 1;
dd89bb
dd89bb
	if (pcount > (main_params->argv_envp_ptr_total / 2))
dd89bb
		return NT_STATUS_BUFFER_TOO_SMALL;
dd89bb
	else if ((main_params->wenvs_buffer_len - main_params->wenvs_bytes_used)
dd89bb
			< sizeof(uintptr_t))
dd89bb
		return NT_STATUS_BUFFER_TOO_SMALL;
dd89bb
dd89bb
	/* first args byte should be aligned at pointer-size boundary */
dd89bb
	main_params->wenvs_bytes_used += sizeof(uintptr_t) - 1;
dd89bb
	main_params->wenvs_bytes_used /= sizeof(uintptr_t);
dd89bb
	main_params->wenvs_bytes_used *= sizeof(uintptr_t);
dd89bb
dd89bb
	/* book-keeping */
dd89bb
	/* block reminder: wargs -- wenvs -- args -- envs */
dd89bb
	main_params->argv = (char **)main_params->wenvp_buffer;
dd89bb
	main_params->argv += main_params->envc + 1;
dd89bb
dd89bb
	main_params->args_buffer = (char *)main_params->wenvs_buffer;
dd89bb
	main_params->args_buffer += main_params->wenvs_bytes_used;
dd89bb
dd89bb
	main_params->args_buffer_len = main_params->wenvs_buffer_len
dd89bb
					- main_params->wenvs_bytes_used;
dd89bb
dd89bb
	main_params->wenvs_buffer_len = main_params->wenvs_bytes_used;
dd89bb
dd89bb
	/* create a utf-8 argv[] array */
dd89bb
	status = __ntapi_tt_array_convert_utf16_to_utf8(
dd89bb
		main_params->wargv_buffer,
dd89bb
		main_params->argv,
dd89bb
		0,
dd89bb
		main_params->args_buffer,
dd89bb
		main_params->args_buffer_len,
dd89bb
		&main_params->args_bytes_written);
dd89bb
dd89bb
	if (status) return status;
dd89bb
dd89bb
	/* first envs byte should be aligned to pointer-size boundary */
dd89bb
	main_params->args_bytes_written += sizeof(uintptr_t) - 1;
dd89bb
	main_params->args_bytes_written /= sizeof(uintptr_t);
dd89bb
	main_params->args_bytes_written *= sizeof(uintptr_t);
dd89bb
dd89bb
	/* book-keeping */
dd89bb
	main_params->envp = main_params->argv + main_params->argc + 1;
dd89bb
dd89bb
	main_params->envs_buffer  = main_params->args_buffer
dd89bb
					+ main_params->args_bytes_written;
dd89bb
dd89bb
	main_params->envs_buffer_len = main_params->args_buffer_len 
dd89bb
					- main_params->args_bytes_written;
dd89bb
dd89bb
	main_params->args_buffer_len = main_params->args_bytes_written;
dd89bb
dd89bb
	/* subsequent streams (if any) should be aligned to pointer-size boundary */
dd89bb
	main_params->envs_bytes_used += sizeof(uintptr_t) - 1;
dd89bb
	main_params->envs_bytes_used /= sizeof(uintptr_t);
dd89bb
	main_params->envs_bytes_used *= sizeof(uintptr_t);
dd89bb
dd89bb
	/* create a utf-8 envp[] array */
dd89bb
	status = __ntapi_tt_array_convert_utf16_to_utf8(
dd89bb
		main_params->wenvp_buffer,
dd89bb
		main_params->envp,
dd89bb
		0,
dd89bb
		main_params->envs_buffer,
dd89bb
		main_params->envs_buffer_len,
dd89bb
		&main_params->envs_bytes_used);
dd89bb
dd89bb
	if (status) return status;
dd89bb
dd89bb
	/* we're good */
dd89bb
	*argc = main_params->argc;
dd89bb
	*argv = main_params->argv;
dd89bb
	*envp = main_params->envp;
dd89bb
dd89bb
	return NT_STATUS_SUCCESS;
dd89bb
}
dd89bb
dd89bb
dd89bb
wchar16_t * __stdcall __ntapi_tt_get_cmd_line_utf16(void)
dd89bb
{
dd89bb
	nt_peb *		peb;
dd89bb
	nt_unicode_string	cmd_line;
dd89bb
dd89bb
	peb = (nt_peb *)pe_get_peb_address();
dd89bb
dd89bb
	if (peb) {
dd89bb
		cmd_line = peb->process_params->command_line;
dd89bb
		return cmd_line.buffer;
dd89bb
	} else
dd89bb
		return (wchar16_t *)0;
dd89bb
}
dd89bb
dd89bb
dd89bb
wchar16_t * __stdcall __ntapi_tt_get_peb_env_block_utf16(void)
dd89bb
{
dd89bb
	nt_peb *		peb;
dd89bb
dd89bb
	peb = (nt_peb *)pe_get_peb_address();
dd89bb
dd89bb
	if (peb)
dd89bb
		return peb->process_params->environment;
dd89bb
	else
dd89bb
		return (wchar16_t *)0;
dd89bb
}