859 lines
24 KiB
C
859 lines
24 KiB
C
/*=========================================================================
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Program: KWSys - Kitware System Library
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Module: $RCSfile$
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Copyright (c) Kitware, Inc., Insight Consortium. All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notices for more information.
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=========================================================================*/
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#include "kwsysPrivate.h"
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#include KWSYS_HEADER(System.h)
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/* Work-around CMake dependency scanning limitation. This must
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duplicate the above list of headers. */
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#if 0
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# include "System.h.in"
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#endif
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#include <stddef.h> /* ptrdiff_t */
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#include <stdlib.h> /* malloc, free */
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#include <string.h> /* strlen */
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#include <ctype.h> /* isalpha */
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#include <stdio.h>
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#if defined(KWSYS_C_HAS_PTRDIFF_T) && KWSYS_C_HAS_PTRDIFF_T
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typedef ptrdiff_t kwsysSystem_ptrdiff_t;
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#else
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typedef int kwsysSystem_ptrdiff_t;
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#endif
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/*
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Notes:
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Make variable replacements open a can of worms. Sometimes they should
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be quoted and sometimes not. Sometimes their replacement values are
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already quoted.
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VS variables cause problems. In order to pass the referenced value
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with spaces the reference must be quoted. If the variable value ends
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in a backslash then it will escape the ending quote! In order to make
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the ending backslash appear we need this:
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"$(InputDir)\"
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However if there is not a trailing backslash then this will put a
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quote in the value so we need:
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"$(InputDir)"
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Make variable references are platform specific so we should probably
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just NOT quote them and let the listfile author deal with it.
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*/
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/*
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TODO: For windows echo:
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To display a pipe (|) or redirection character (< or >) when using the
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echo command, use a caret character immediately before the pipe or
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redirection character (for example, ^>, ^<, or ^| ). If you need to
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use the caret character itself (^), use two in a row (^^).
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*/
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/*--------------------------------------------------------------------------*/
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static int kwsysSystem_Shell__CharIsWhitespace(char c)
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{
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return ((c == ' ') || (c == '\t'));
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}
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/*--------------------------------------------------------------------------*/
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static int kwsysSystem_Shell__CharNeedsQuotesOnUnix(char c)
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{
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return ((c == '\'') || (c == '`') || (c == ';') || (c == '#') ||
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(c == '&') || (c == '$') || (c == '(') || (c == ')') ||
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(c == '~') || (c == '<') || (c == '>') || (c == '|') ||
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(c == '*') || (c == '^') || (c == '\\'));
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}
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/*--------------------------------------------------------------------------*/
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static int kwsysSystem_Shell__CharNeedsQuotesOnWindows(char c)
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{
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return ((c == '\'') || (c == '#') || (c == '&') ||
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(c == '<') || (c == '>') || (c == '|') || (c == '^'));
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}
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/*--------------------------------------------------------------------------*/
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static int kwsysSystem_Shell__CharNeedsQuotes(char c, int isUnix, int flags)
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{
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/* On Windows the built-in command shell echo never needs quotes. */
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if(!isUnix && (flags & kwsysSystem_Shell_Flag_EchoWindows))
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{
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return 0;
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}
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/* On all platforms quotes are needed to preserve whitespace. */
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if(kwsysSystem_Shell__CharIsWhitespace(c))
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{
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return 1;
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}
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if(isUnix)
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{
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/* On UNIX several special characters need quotes to preserve them. */
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if(kwsysSystem_Shell__CharNeedsQuotesOnUnix(c))
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{
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return 1;
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}
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}
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else
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{
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/* On Windows several special characters need quotes to preserve them. */
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if(kwsysSystem_Shell__CharNeedsQuotesOnWindows(c))
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{
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return 1;
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}
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}
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return 0;
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}
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/*--------------------------------------------------------------------------*/
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static int kwsysSystem_Shell__CharIsMakeVariableName(char c)
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{
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return c && (c == '_' || isalpha(((int)c)));
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}
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/*--------------------------------------------------------------------------*/
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static const char* kwsysSystem_Shell__SkipMakeVariables(const char* c)
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{
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while(*c == '$' && *(c+1) == '(')
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{
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const char* skip = c+2;
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while(kwsysSystem_Shell__CharIsMakeVariableName(*skip))
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{
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++skip;
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}
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if(*skip == ')')
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{
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c = skip+1;
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}
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else
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{
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break;
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}
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}
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return c;
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}
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/*
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Allowing make variable replacements opens a can of worms. Sometimes
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they should be quoted and sometimes not. Sometimes their replacement
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values are already quoted or contain escapes.
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Some Visual Studio variables cause problems. In order to pass the
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referenced value with spaces the reference must be quoted. If the
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variable value ends in a backslash then it will escape the ending
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quote! In order to make the ending backslash appear we need this:
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"$(InputDir)\"
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However if there is not a trailing backslash then this will put a
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quote in the value so we need:
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"$(InputDir)"
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This macro decides whether we quote an argument just because it
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contains a make variable reference. This should be replaced with a
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flag later when we understand applications of this better.
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*/
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#define KWSYS_SYSTEM_SHELL_QUOTE_MAKE_VARIABLES 0
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/*--------------------------------------------------------------------------*/
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static int kwsysSystem_Shell__ArgumentNeedsQuotes(const char* in, int isUnix,
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int flags)
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{
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/* The empty string needs quotes. */
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if(!*in)
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{
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return 1;
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}
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/* Scan the string for characters that require quoting. */
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{
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const char* c;
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for(c=in; *c; ++c)
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{
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/* Look for $(MAKEVAR) syntax if requested. */
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if(flags & kwsysSystem_Shell_Flag_AllowMakeVariables)
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{
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#if KWSYS_SYSTEM_SHELL_QUOTE_MAKE_VARIABLES
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const char* skip = kwsysSystem_Shell__SkipMakeVariables(c);
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if(skip != c)
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{
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/* We need to quote make variable references to preserve the
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string with contents substituted in its place. */
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return 1;
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}
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#else
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/* Skip over the make variable references if any are present. */
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c = kwsysSystem_Shell__SkipMakeVariables(c);
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/* Stop if we have reached the end of the string. */
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if(!*c)
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{
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break;
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}
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#endif
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}
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/* Check whether this character needs quotes. */
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if(kwsysSystem_Shell__CharNeedsQuotes(*c, isUnix, flags))
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{
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return 1;
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}
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}
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}
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/* On Windows some single character arguments need quotes. */
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if(!isUnix && *in && !*(in+1))
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{
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char c = *in;
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if((c == '?') || (c == '&') || (c == '^') || (c == '|') || (c == '#'))
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{
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return 1;
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}
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}
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return 0;
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}
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/*--------------------------------------------------------------------------*/
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static int kwsysSystem_Shell__GetArgumentSize(const char* in,
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int isUnix, int flags)
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{
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/* Start with the length of the original argument, plus one for
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either a terminating null or a separating space. */
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int size = (int)strlen(in) + 1;
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/* String iterator. */
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const char* c;
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/* Keep track of how many backslashes have been encountered in a row. */
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int windows_backslashes = 0;
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/* Scan the string for characters that require escaping or quoting. */
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for(c=in; *c; ++c)
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{
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/* Look for $(MAKEVAR) syntax if requested. */
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if(flags & kwsysSystem_Shell_Flag_AllowMakeVariables)
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{
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/* Skip over the make variable references if any are present. */
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c = kwsysSystem_Shell__SkipMakeVariables(c);
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/* Stop if we have reached the end of the string. */
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if(!*c)
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{
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break;
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}
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}
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/* Check whether this character needs escaping for the shell. */
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if(isUnix)
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{
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/* On Unix a few special characters need escaping even inside a
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quoted argument. */
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if(*c == '\\' || *c == '"' || *c == '`' || *c == '$')
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{
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/* This character needs a backslash to escape it. */
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++size;
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}
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}
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else if(flags & kwsysSystem_Shell_Flag_EchoWindows)
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{
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/* On Windows the built-in command shell echo never needs escaping. */
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}
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else
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{
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/* On Windows only backslashes and double-quotes need escaping. */
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if(*c == '\\')
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{
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/* Found a backslash. It may need to be escaped later. */
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++windows_backslashes;
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}
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else if(*c == '"')
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{
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/* Found a double-quote. We need to escape it and all
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immediately preceding backslashes. */
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size += windows_backslashes + 1;
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windows_backslashes = 0;
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}
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else
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{
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/* Found another character. This eliminates the possibility
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that any immediately preceding backslashes will be
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escaped. */
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windows_backslashes = 0;
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}
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}
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/* Check whether this character needs escaping for a make tool. */
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if(*c == '$')
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{
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if(flags & kwsysSystem_Shell_Flag_Make)
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{
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/* In Makefiles a dollar is written $$ so we need one extra
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character. */
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++size;
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}
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else if(flags & kwsysSystem_Shell_Flag_VSIDE)
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{
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/* In a VS IDE a dollar is written "$" so we need two extra
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characters. */
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size += 2;
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}
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}
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else if(*c == '#')
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{
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if((flags & kwsysSystem_Shell_Flag_Make) &&
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(flags & kwsysSystem_Shell_Flag_WatcomWMake))
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{
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/* In Watcom WMake makefiles a pound is written $# so we need
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one extra character. */
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++size;
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}
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}
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else if(*c == '%')
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{
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if((flags & kwsysSystem_Shell_Flag_VSIDE) ||
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((flags & kwsysSystem_Shell_Flag_Make) &&
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((flags & kwsysSystem_Shell_Flag_MinGWMake) ||
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(flags & kwsysSystem_Shell_Flag_NMake))))
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{
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/* In the VS IDE, NMake, or MinGW make a percent is written %%
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so we need one extra characters. */
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size += 1;
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}
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}
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else if(*c == ';')
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{
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if(flags & kwsysSystem_Shell_Flag_VSIDE)
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{
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/* In a VS IDE a semicolon is written ";" so we need two extra
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characters. */
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size += 2;
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}
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}
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}
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/* Check whether the argument needs surrounding quotes. */
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if(kwsysSystem_Shell__ArgumentNeedsQuotes(in, isUnix, flags))
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{
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/* Surrounding quotes are needed. Allocate space for them. */
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size += 2;
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/* We must escape all ending backslashes when quoting on windows. */
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size += windows_backslashes;
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}
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return size;
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}
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/*--------------------------------------------------------------------------*/
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static char* kwsysSystem_Shell__GetArgument(const char* in, char* out,
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int isUnix, int flags)
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{
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/* String iterator. */
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const char* c;
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/* Keep track of how many backslashes have been encountered in a row. */
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int windows_backslashes = 0;
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/* Whether the argument must be quoted. */
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int needQuotes = kwsysSystem_Shell__ArgumentNeedsQuotes(in, isUnix, flags);
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if(needQuotes)
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{
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/* Add the opening quote for this argument. */
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*out++ = '"';
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}
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/* Scan the string for characters that require escaping or quoting. */
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for(c=in; *c; ++c)
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{
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/* Look for $(MAKEVAR) syntax if requested. */
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if(flags & kwsysSystem_Shell_Flag_AllowMakeVariables)
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{
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const char* skip = kwsysSystem_Shell__SkipMakeVariables(c);
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if(skip != c)
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{
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/* Copy to the end of the make variable references. */
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while(c != skip)
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{
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*out++ = *c++;
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}
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/* The make variable reference eliminates any escaping needed
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for preceding backslashes. */
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windows_backslashes = 0;
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/* Stop if we have reached the end of the string. */
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if(!*c)
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{
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break;
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}
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}
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}
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/* Check whether this character needs escaping for the shell. */
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if(isUnix)
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{
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/* On Unix a few special characters need escaping even inside a
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quoted argument. */
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if(*c == '\\' || *c == '"' || *c == '`' || *c == '$')
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{
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/* This character needs a backslash to escape it. */
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*out++ = '\\';
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}
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}
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else if(flags & kwsysSystem_Shell_Flag_EchoWindows)
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{
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/* On Windows the built-in command shell echo never needs escaping. */
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}
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else
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{
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/* On Windows only backslashes and double-quotes need escaping. */
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if(*c == '\\')
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{
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/* Found a backslash. It may need to be escaped later. */
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++windows_backslashes;
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}
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else if(*c == '"')
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{
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/* Found a double-quote. Escape all immediately preceding
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backslashes. */
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while(windows_backslashes > 0)
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{
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--windows_backslashes;
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*out++ = '\\';
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}
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/* Add the backslash to escape the double-quote. */
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*out++ = '\\';
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}
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else
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{
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/* We encountered a normal character. This eliminates any
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escaping needed for preceding backslashes. */
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windows_backslashes = 0;
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}
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}
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/* Check whether this character needs escaping for a make tool. */
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if(*c == '$')
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{
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if(flags & kwsysSystem_Shell_Flag_Make)
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{
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/* In Makefiles a dollar is written $$. The make tool will
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replace it with just $ before passing it to the shell. */
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*out++ = '$';
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*out++ = '$';
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}
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else if(flags & kwsysSystem_Shell_Flag_VSIDE)
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{
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/* In a VS IDE a dollar is written "$". If this is written in
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an un-quoted argument it starts a quoted segment, inserts
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the $ and ends the segment. If it is written in a quoted
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argument it ends quoting, inserts the $ and restarts
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quoting. Either way the $ is isolated from surrounding
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text to avoid looking like a variable reference. */
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*out++ = '"';
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*out++ = '$';
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*out++ = '"';
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}
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else
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{
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/* Otherwise a dollar is written just $. */
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*out++ = '$';
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}
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}
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else if(*c == '#')
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{
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if((flags & kwsysSystem_Shell_Flag_Make) &&
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(flags & kwsysSystem_Shell_Flag_WatcomWMake))
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{
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/* In Watcom WMake makefiles a pound is written $#. The make
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tool will replace it with just # before passing it to the
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shell. */
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*out++ = '$';
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*out++ = '#';
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}
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else
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{
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/* Otherwise a pound is written just #. */
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*out++ = '#';
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}
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}
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else if(*c == '%')
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{
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if((flags & kwsysSystem_Shell_Flag_VSIDE) ||
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((flags & kwsysSystem_Shell_Flag_Make) &&
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((flags & kwsysSystem_Shell_Flag_MinGWMake) ||
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(flags & kwsysSystem_Shell_Flag_NMake))))
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{
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/* In the VS IDE, NMake, or MinGW make a percent is written %%. */
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*out++ = '%';
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*out++ = '%';
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}
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else
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{
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/* Otherwise a percent is written just %. */
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*out++ = '%';
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}
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}
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else if(*c == ';')
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{
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if(flags & kwsysSystem_Shell_Flag_VSIDE)
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{
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/* In a VS IDE a semicolon is written ";". If this is written
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in an un-quoted argument it starts a quoted segment,
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inserts the ; and ends the segment. If it is written in a
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quoted argument it ends quoting, inserts the ; and restarts
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quoting. Either way the ; is isolated. */
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*out++ = '"';
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*out++ = ';';
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*out++ = '"';
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}
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else
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{
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/* Otherwise a semicolon is written just ;. */
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*out++ = ';';
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}
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}
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else
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{
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/* Store this character. */
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*out++ = *c;
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}
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}
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if(needQuotes)
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{
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/* Add enough backslashes to escape any trailing ones. */
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while(windows_backslashes > 0)
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{
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--windows_backslashes;
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*out++ = '\\';
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}
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/* Add the closing quote for this argument. */
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*out++ = '"';
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}
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/* Store a terminating null without incrementing. */
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*out = 0;
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return out;
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}
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/*--------------------------------------------------------------------------*/
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char* kwsysSystem_Shell_GetArgumentForWindows(const char* in,
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char* out,
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int flags)
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{
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return kwsysSystem_Shell__GetArgument(in, out, 0, flags);
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}
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/*--------------------------------------------------------------------------*/
|
|
char* kwsysSystem_Shell_GetArgumentForUnix(const char* in,
|
|
char* out,
|
|
int flags)
|
|
{
|
|
return kwsysSystem_Shell__GetArgument(in, out, 1, flags);
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
int kwsysSystem_Shell_GetArgumentSizeForWindows(const char* in, int flags)
|
|
{
|
|
return kwsysSystem_Shell__GetArgumentSize(in, 0, flags);
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
int kwsysSystem_Shell_GetArgumentSizeForUnix(const char* in, int flags)
|
|
{
|
|
return kwsysSystem_Shell__GetArgumentSize(in, 1, flags);
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
static int kwsysSystem__AppendByte(char* local,
|
|
char** begin, char** end,
|
|
int* size, char c)
|
|
{
|
|
/* Allocate space for the character. */
|
|
if((*end - *begin) >= *size)
|
|
{
|
|
kwsysSystem_ptrdiff_t length = *end - *begin;
|
|
char* newBuffer = (char*)malloc((size_t)(*size*2));
|
|
if(!newBuffer)
|
|
{
|
|
return 0;
|
|
}
|
|
memcpy(newBuffer, *begin, (size_t)(length)*sizeof(char));
|
|
if(*begin != local)
|
|
{
|
|
free(*begin);
|
|
}
|
|
*begin = newBuffer;
|
|
*end = *begin + length;
|
|
*size *= 2;
|
|
}
|
|
|
|
/* Store the character. */
|
|
*(*end)++ = c;
|
|
return 1;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
static int kwsysSystem__AppendArgument(char** local,
|
|
char*** begin, char*** end,
|
|
int* size,
|
|
char* arg_local,
|
|
char** arg_begin, char** arg_end,
|
|
int* arg_size)
|
|
{
|
|
/* Append a null-terminator to the argument string. */
|
|
if(!kwsysSystem__AppendByte(arg_local, arg_begin, arg_end, arg_size, '\0'))
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Allocate space for the argument pointer. */
|
|
if((*end - *begin) >= *size)
|
|
{
|
|
kwsysSystem_ptrdiff_t length = *end - *begin;
|
|
char** newPointers = (char**)malloc((size_t)(*size)*2*sizeof(char*));
|
|
if(!newPointers)
|
|
{
|
|
return 0;
|
|
}
|
|
memcpy(newPointers, *begin, (size_t)(length)*sizeof(char*));
|
|
if(*begin != local)
|
|
{
|
|
free(*begin);
|
|
}
|
|
*begin = newPointers;
|
|
*end = *begin + length;
|
|
*size *= 2;
|
|
}
|
|
|
|
/* Allocate space for the argument string. */
|
|
**end = (char*)malloc((size_t)(*arg_end - *arg_begin));
|
|
if(!**end)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Store the argument in the command array. */
|
|
memcpy(**end, *arg_begin,(size_t)(*arg_end - *arg_begin));
|
|
++(*end);
|
|
|
|
/* Reset the argument to be empty. */
|
|
*arg_end = *arg_begin;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
#define KWSYSPE_LOCAL_BYTE_COUNT 1024
|
|
#define KWSYSPE_LOCAL_ARGS_COUNT 32
|
|
static char** kwsysSystem__ParseUnixCommand(const char* command, int flags)
|
|
{
|
|
/* Create a buffer for argument pointers during parsing. */
|
|
char* local_pointers[KWSYSPE_LOCAL_ARGS_COUNT];
|
|
int pointers_size = KWSYSPE_LOCAL_ARGS_COUNT;
|
|
char** pointer_begin = local_pointers;
|
|
char** pointer_end = pointer_begin;
|
|
|
|
/* Create a buffer for argument strings during parsing. */
|
|
char local_buffer[KWSYSPE_LOCAL_BYTE_COUNT];
|
|
int buffer_size = KWSYSPE_LOCAL_BYTE_COUNT;
|
|
char* buffer_begin = local_buffer;
|
|
char* buffer_end = buffer_begin;
|
|
|
|
/* Parse the command string. Try to behave like a UNIX shell. */
|
|
char** newCommand = 0;
|
|
const char* c = command;
|
|
int in_argument = 0;
|
|
int in_escape = 0;
|
|
int in_single = 0;
|
|
int in_double = 0;
|
|
int failed = 0;
|
|
for(;*c; ++c)
|
|
{
|
|
if(in_escape)
|
|
{
|
|
/* This character is escaped so do no special handling. */
|
|
if(!in_argument)
|
|
{
|
|
in_argument = 1;
|
|
}
|
|
if(!kwsysSystem__AppendByte(local_buffer, &buffer_begin,
|
|
&buffer_end, &buffer_size, *c))
|
|
{
|
|
failed = 1;
|
|
break;
|
|
}
|
|
in_escape = 0;
|
|
}
|
|
else if(*c == '\\')
|
|
{
|
|
/* The next character should be escaped. */
|
|
in_escape = 1;
|
|
}
|
|
else if(*c == '\'' && !in_double)
|
|
{
|
|
/* Enter or exit single-quote state. */
|
|
if(in_single)
|
|
{
|
|
in_single = 0;
|
|
}
|
|
else
|
|
{
|
|
in_single = 1;
|
|
if(!in_argument)
|
|
{
|
|
in_argument = 1;
|
|
}
|
|
}
|
|
}
|
|
else if(*c == '"' && !in_single)
|
|
{
|
|
/* Enter or exit double-quote state. */
|
|
if(in_double)
|
|
{
|
|
in_double = 0;
|
|
}
|
|
else
|
|
{
|
|
in_double = 1;
|
|
if(!in_argument)
|
|
{
|
|
in_argument = 1;
|
|
}
|
|
}
|
|
}
|
|
else if(isspace((unsigned char) *c))
|
|
{
|
|
if(in_argument)
|
|
{
|
|
if(in_single || in_double)
|
|
{
|
|
/* This space belongs to a quoted argument. */
|
|
if(!kwsysSystem__AppendByte(local_buffer, &buffer_begin,
|
|
&buffer_end, &buffer_size, *c))
|
|
{
|
|
failed = 1;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* This argument has been terminated by whitespace. */
|
|
if(!kwsysSystem__AppendArgument(local_pointers, &pointer_begin,
|
|
&pointer_end, &pointers_size,
|
|
local_buffer, &buffer_begin,
|
|
&buffer_end, &buffer_size))
|
|
{
|
|
failed = 1;
|
|
break;
|
|
}
|
|
in_argument = 0;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* This character belong to an argument. */
|
|
if(!in_argument)
|
|
{
|
|
in_argument = 1;
|
|
}
|
|
if(!kwsysSystem__AppendByte(local_buffer, &buffer_begin,
|
|
&buffer_end, &buffer_size, *c))
|
|
{
|
|
failed = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Finish the last argument. */
|
|
if(in_argument)
|
|
{
|
|
if(!kwsysSystem__AppendArgument(local_pointers, &pointer_begin,
|
|
&pointer_end, &pointers_size,
|
|
local_buffer, &buffer_begin,
|
|
&buffer_end, &buffer_size))
|
|
{
|
|
failed = 1;
|
|
}
|
|
}
|
|
|
|
/* If we still have memory allocate space for the new command
|
|
buffer. */
|
|
if(!failed)
|
|
{
|
|
kwsysSystem_ptrdiff_t n = pointer_end - pointer_begin;
|
|
newCommand = (char**)malloc((size_t)(n+1)*sizeof(char*));
|
|
}
|
|
|
|
if(newCommand)
|
|
{
|
|
/* Copy the arguments into the new command buffer. */
|
|
kwsysSystem_ptrdiff_t n = pointer_end - pointer_begin;
|
|
memcpy(newCommand, pointer_begin, sizeof(char*)*(size_t)(n));
|
|
newCommand[n] = 0;
|
|
}
|
|
else
|
|
{
|
|
/* Free arguments already allocated. */
|
|
while(pointer_end != pointer_begin)
|
|
{
|
|
free(*(--pointer_end));
|
|
}
|
|
}
|
|
|
|
/* Free temporary buffers. */
|
|
if(pointer_begin != local_pointers)
|
|
{
|
|
free(pointer_begin);
|
|
}
|
|
if(buffer_begin != local_buffer)
|
|
{
|
|
free(buffer_begin);
|
|
}
|
|
|
|
/* The flags argument is currently unused. */
|
|
(void)flags;
|
|
|
|
/* Return the final command buffer. */
|
|
return newCommand;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
char** kwsysSystem_Parse_CommandForUnix(const char* command, int flags)
|
|
{
|
|
/* Validate the flags. */
|
|
if(flags != 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Forward to our internal implementation. */
|
|
return kwsysSystem__ParseUnixCommand(command, flags);
|
|
}
|