394 lines
11 KiB
C
394 lines
11 KiB
C
/*
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*stdargv.c - standard & wildcard _setargv routine
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* Copyright (c) 1989-1997, Microsoft Corporation. All rights reserved.
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*Purpose:
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* processes program command line, with or without wildcard expansion
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*/
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#ifdef _MBCS
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#undef _MBCS
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#endif
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#ifndef _POSIX_
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#include <cruntime.h>
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#include <internal.h>
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#include <rterr.h>
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#include <stdlib.h>
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#if defined(WILDCARD) || defined(_WIN32)
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#include <dos.h>
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#include <oscalls.h>
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#endif
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#include <tchar.h>
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// #include <dbgint.h>
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#define NULCHAR _T('\0')
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#define SPACECHAR _T(' ')
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#define TABCHAR _T('\t')
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#define DQUOTECHAR _T('\"')
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#define SLASHCHAR _T('\\')
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#ifdef WPRFLAG
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static void __cdecl wparse_cmdline(wchar_t *cmdstart, wchar_t **argv, wchar_t *args,
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int *numargs, int *numchars);
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#else
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static void __cdecl parse_cmdline(char *cmdstart, char **argv, char *args,
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int *numargs, int *numchars);
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#endif
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/*
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*_setargv, __setargv - set up "argc" and "argv" for C programs
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*Purpose:
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* Read the command line and create the argv array for C
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* programs.
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*Entry:
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* Arguments are retrieved from the program command line,
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* pointed to by _acmdln.
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*Exit:
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* "argv" points to a null-terminated list of pointers to ASCIZ
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* strings, each of which is an argument from the command line.
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* "argc" is the number of arguments. The strings are copied from
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* the environment segment into space allocated on the heap/stack.
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* The list of pointers is also located on the heap or stack.
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* _pgmptr points to the program name.
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*Exceptions:
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* Terminates with out of memory error if no memory to allocate.
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*/
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#ifdef WILDCARD
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#ifdef WPRFLAG
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void __cdecl __wsetargv (
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#else
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void __cdecl __setargv (
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#endif /* WPRFLAG */
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#else /* WILDCARD */
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#ifdef WPRFLAG
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void __cdecl _wsetargv (
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#else
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void __cdecl _setargv (
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#endif /* WPRFLAG */
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#endif /* WILDCARD */
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void
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)
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{
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_TSCHAR *p;
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_TSCHAR *cmdstart; /* start of command line to parse */
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int numargs, numchars;
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#ifdef DLL_FOR_WIN32S
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#define _pgmname (_GetPPD()->_ppd__pgmname)
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#else /* ndef DLL_FOR_WIN32S */
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static _TSCHAR _pgmname[ MAX_PATH ];
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#endif /* DLL_FOR_WIN32S */
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/* Get the program name pointer from Win32 Base */
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GetModuleFileName( NULL, _pgmname, sizeof( _pgmname ) / sizeof(_TSCHAR));
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#ifdef WPRFLAG
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_wpgmptr = _pgmname;
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#else
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_pgmptr = _pgmname;
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#endif
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/* if there's no command line at all (won't happen from cmd.exe, but
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possibly another program), then we use _pgmptr as the command line
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to parse, so that argv[0] is initialized to the program name */
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#ifdef WPRFLAG
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cmdstart = (*_wcmdln == NULCHAR) ? _wpgmptr : _wcmdln;
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#else
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cmdstart = (*_acmdln == NULCHAR) ? _pgmptr : _acmdln;
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#endif
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/* first find out how much space is needed to store args */
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#ifdef WPRFLAG
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wparse_cmdline(cmdstart, NULL, NULL, &numargs, &numchars);
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#else
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parse_cmdline(cmdstart, NULL, NULL, &numargs, &numchars);
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#endif
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/* allocate space for argv[] vector and strings */
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p = malloc(numargs * sizeof(_TSCHAR *) + numchars * sizeof(_TSCHAR));
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if (p == NULL)
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_amsg_exit(_RT_SPACEARG);
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/* store args and argv ptrs in just allocated block */
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#ifdef WPRFLAG
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wparse_cmdline(cmdstart, (wchar_t **)p, (wchar_t *)(((char *)p) + numargs * sizeof(wchar_t *)), &numargs, &numchars);
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#else
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parse_cmdline(cmdstart, (char **)p, p + numargs * sizeof(char *), &numargs, &numchars);
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#endif
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/* set argv and argc */
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__argc = numargs - 1;
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#ifdef WPRFLAG
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__wargv = (wchar_t **)p;
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#else
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__argv = (char **)p;
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#endif /* WPRFLAG */
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#ifdef WILDCARD
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/* call _[w]cwild to expand wildcards in arg vector */
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#ifdef WPRFLAG
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if (_wcwild())
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#else /* WPRFLAG */
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if (_cwild())
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#endif /* WPRFLAG */
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_amsg_exit(_RT_SPACEARG); /* out of space */
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#endif /* WILDCARD */
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}
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/*
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*static void parse_cmdline(cmdstart, argv, args, numargs, numchars)
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*Purpose:
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* Parses the command line and sets up the argv[] array.
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* On entry, cmdstart should point to the command line,
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* argv should point to memory for the argv array, args
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* points to memory to place the text of the arguments.
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* If these are NULL, then no storing (only coujting)
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* is done. On exit, *numargs has the number of
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* arguments (plus one for a final NULL argument),
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* and *numchars has the number of bytes used in the buffer
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* pointed to by args.
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*Entry:
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* _TSCHAR *cmdstart - pointer to command line of the form
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* <progname><nul><args><nul>
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* _TSCHAR **argv - where to build argv array; NULL means don't
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* build array
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* _TSCHAR *args - where to place argument text; NULL means don't
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* store text
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*Exit:
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* no return value
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* int *numargs - returns number of argv entries created
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* int *numchars - number of characters used in args buffer
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*Exceptions:
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*/
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#ifdef WPRFLAG
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static void __cdecl wparse_cmdline (
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#else
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static void __cdecl parse_cmdline (
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#endif
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_TSCHAR *cmdstart,
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_TSCHAR **argv,
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_TSCHAR *args,
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int *numargs,
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int *numchars
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)
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{
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_TSCHAR *p;
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_TUCHAR c;
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int inquote; /* 1 = inside quotes */
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int copychar; /* 1 = copy char to *args */
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unsigned numslash; /* num of backslashes seen */
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*numchars = 0;
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*numargs = 1; /* the program name at least */
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/* first scan the program name, copy it, and count the bytes */
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p = cmdstart;
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if (argv)
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*argv++ = args;
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#ifdef WILDCARD
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/* To handle later wild card expansion, we prefix each entry by
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it's first character before quote handling. This is done
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so _[w]cwild() knows whether to expand an entry or not. */
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if (args)
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*args++ = *p;
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++*numchars;
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#endif /* WILDCARD */
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/* A quoted program name is handled here. The handling is much
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simpler than for other arguments. Basically, whatever lies
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between the leading double-quote and next one, or a terminal null
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character is simply accepted. Fancier handling is not required
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because the program name must be a legal NTFS/HPFS file name.
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Note that the double-quote characters are not copied, nor do they
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contribute to numchars. */
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if ( *p == DQUOTECHAR ) {
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/* scan from just past the first double-quote through the next
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double-quote, or up to a null, whichever comes first */
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while ( (*(++p) != DQUOTECHAR) && (*p != NULCHAR) ) {
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#ifdef _MBCS
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if (_ismbblead(*p)) {
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++*numchars;
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if ( args )
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*args++ = *p++;
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}
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#endif
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++*numchars;
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if ( args )
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*args++ = *p;
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}
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/* append the terminating null */
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++*numchars;
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if ( args )
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*args++ = NULCHAR;
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/* if we stopped on a double-quote (usual case), skip over it */
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if ( *p == DQUOTECHAR )
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p++;
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}
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else {
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/* Not a quoted program name */
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do {
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++*numchars;
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if (args)
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*args++ = *p;
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c = (_TUCHAR) *p++;
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#ifdef _MBCS
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if (_ismbblead(c)) {
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++*numchars;
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if (args)
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*args++ = *p; /* copy 2nd byte too */
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p++; /* skip over trail byte */
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}
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#endif
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} while ( c != SPACECHAR && c != NULCHAR && c != TABCHAR );
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if ( c == NULCHAR ) {
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p--;
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} else {
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if (args)
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*(args-1) = NULCHAR;
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}
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}
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inquote = 0;
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/* loop on each argument */
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for(;;) {
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if ( *p ) {
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while (*p == SPACECHAR || *p == TABCHAR)
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++p;
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}
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if (*p == NULCHAR)
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break; /* end of args */
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/* scan an argument */
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if (argv)
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*argv++ = args; /* store ptr to arg */
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++*numargs;
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#ifdef WILDCARD
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/* To handle later wild card expansion, we prefix each entry by
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it's first character before quote handling. This is done
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so _[w]cwild() knows whether to expand an entry or not. */
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if (args)
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*args++ = *p;
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++*numchars;
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#endif /* WILDCARD */
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/* loop through scanning one argument */
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for (;;) {
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copychar = 1;
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/* Rules: 2N backslashes + " ==> N backslashes and begin/end quote
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2N+1 backslashes + " ==> N backslashes + literal "
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N backslashes ==> N backslashes */
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numslash = 0;
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while (*p == SLASHCHAR) {
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/* count number of backslashes for use below */
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++p;
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++numslash;
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}
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if (*p == DQUOTECHAR) {
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/* if 2N backslashes before, start/end quote, otherwise
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copy literally */
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if (numslash % 2 == 0) {
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if (inquote) {
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if (p[1] == DQUOTECHAR)
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p++; /* Double quote inside quoted string */
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else /* skip first quote char and copy second */
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copychar = 0;
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} else
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copychar = 0; /* don't copy quote */
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inquote = !inquote;
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}
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numslash /= 2; /* divide numslash by two */
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}
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/* copy slashes */
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while (numslash--) {
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if (args)
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*args++ = SLASHCHAR;
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++*numchars;
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}
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/* if at end of arg, break loop */
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if (*p == NULCHAR || (!inquote && (*p == SPACECHAR || *p == TABCHAR)))
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break;
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/* copy character into argument */
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#ifdef _MBCS
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if (copychar) {
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if (args) {
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if (_ismbblead(*p)) {
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*args++ = *p++;
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++*numchars;
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}
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*args++ = *p;
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} else {
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if (_ismbblead(*p)) {
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++p;
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++*numchars;
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}
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}
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++*numchars;
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}
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++p;
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#else
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if (copychar) {
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if (args)
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*args++ = *p;
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++*numchars;
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}
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++p;
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#endif
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}
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/* null-terminate the argument */
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if (args)
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*args++ = NULCHAR; /* terminate string */
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++*numchars;
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}
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/* We put one last argument in -- a null ptr */
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if (argv)
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*argv++ = NULL;
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++*numargs;
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}
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#endif /* ndef _POSIX_ */
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