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/*=========================================================================
Program: KWSys - Kitware System Library
Module: $RCSfile$
Copyright (c) Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "kwsysPrivate.h"
#include KWSYS_HEADER(System.h)
/* Work-around CMake dependency scanning limitation. This must
duplicate the above list of headers. */
#if 0
# include "System.h.in"
#endif
#include <string.h> /* strlen */
/*--------------------------------------------------------------------------*/
static int kwsysSystemWindowsShellArgumentNeedsEscape(const char* in)
{
/* Scan the string for characters that need escaping. Note that
single quotes seem to need escaping for some windows shell
environments (mingw32-make shell for example). Single quotes do
not actually need backslash escapes but must be in a
double-quoted argument. */
const char* c;
for(c=in; *c; ++c)
{
if(*c == ' ' || *c == '\t' || *c == '"' || *c == '\'')
{
return 1;
}
}
return 0;
}
/*--------------------------------------------------------------------------*/
int kwsysSystem_Windows_ShellArgumentSize(const char* in)
{
/* Start with the length of the original argument, plus one for
either a terminating null or a separating space. */
int length = (int)strlen(in) + 1;
/* String iterator. */
const char* c;
/* Keep track of how many backslashes have been encountered in a row. */
int backslashes = 0;
/* If nothing needs escaping, we do not need any extra length. */
if(!kwsysSystemWindowsShellArgumentNeedsEscape(in))
{
return length;
}
/* Add 2 for double quotes since spaces are present. */
length += 2;
/* Scan the string to find characters that need escaping. */
for(c=in; *c; ++c)
{
if(*c == '\\')
{
/* Found a backslash. It may need to be escaped later. */
++backslashes;
}
else if(*c == '"')
{
/* Found a double-quote. We need to escape it and all
immediately preceding backslashes. */
length += backslashes + 1;
backslashes = 0;
}
else
{
/* Found another character. This eliminates the possibility
that any immediately preceding backslashes will be
escaped. */
backslashes = 0;
}
}
/* We need to escape all ending backslashes. */
length += backslashes;
return length;
}
/*--------------------------------------------------------------------------*/
char* kwsysSystem_Windows_ShellArgument(const char* in, char* out)
{
/* String iterator. */
const char* c;
/* Keep track of how many backslashes have been encountered in a row. */
int backslashes = 0;
/* If nothing needs escaping, we can pass the argument verbatim. */
if(!kwsysSystemWindowsShellArgumentNeedsEscape(in))
{
/* Just copy the string. */
for(c=in; *c; ++c)
{
*out++ = *c;
}
/* Store a terminating null without incrementing. */
*out = 0;
return out;
}
/* Add the opening double-quote for this argument. */
*out++ = '"';
/* Add the characters of the argument, possibly escaping them. */
for(c=in; *c; ++c)
{
if(*c == '\\')
{
/* Found a backslash. It may need to be escaped later. */
++backslashes;
*out++ = '\\';
}
else if(*c == '"')
{
/* Add enough backslashes to escape any that preceded the
double-quote. */
while(backslashes > 0)
{
--backslashes;
*out++ = '\\';
}
/* Add the backslash to escape the double-quote. */
*out++ = '\\';
/* Add the double-quote itself. */
*out++ = '"';
}
else
{
/* We encountered a normal character. This eliminates any
escaping needed for preceding backslashes. Add the
character. */
backslashes = 0;
*out++ = *c;
}
}
/* Add enough backslashes to escape any trailing ones. */
while(backslashes > 0)
{
--backslashes;
*out++ = '\\';
}
/* Add the closing double-quote for this argument. */
*out++ = '"';
/* Store a terminating null without incrementing. */
*out = 0;
return out;
}
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