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Create a branch for header work.
svn path=/branches/header-work/; revision=45691
This commit is contained in:
Timo Kreuzer
parent
14fe274b1c
commit
9ea495ba33
19538 changed files with 0 additions and 1063950 deletions
508
base/shell/cmd/for.c
Normal file
508
base/shell/cmd/for.c
Normal file
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@ -0,0 +1,508 @@
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/*
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* FOR.C - for internal batch command.
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*
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*
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* History:
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*
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* 16-Jul-1998 (Hans B Pufal)
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* Started.
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*
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* 16-Jul-1998 (John P Price)
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* Seperated commands into individual files.
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*
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* 19-Jul-1998 (Hans B Pufal)
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* Implementation of FOR.
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*
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* 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
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* Added config.h include.
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*
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* 20-Jan-1999 (Eric Kohl)
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* Unicode and redirection safe!
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*
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* 01-Sep-1999 (Eric Kohl)
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* Added help text.
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*
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* 23-Feb-2001 (Carl Nettelblad <cnettel@hem.passagen.se>)
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* Implemented preservation of echo flag. Some other for related
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* code in other files fixed, too.
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*
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* 28-Apr-2005 (Magnus Olsen) <magnus@greatlord.com>)
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* Remove all hardcode string to En.rc
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*/
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#include <precomp.h>
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/* FOR is a special command, so this function is only used for showing help now */
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INT cmd_for (LPTSTR param)
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{
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TRACE ("cmd_for (\'%s\')\n", debugstr_aw(param));
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if (!_tcsncmp (param, _T("/?"), 2))
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{
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ConOutResPaging(TRUE,STRING_FOR_HELP1);
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return 0;
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}
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error_syntax(param);
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return 1;
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}
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/* The stack of current FOR contexts.
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* NULL when no FOR command is active */
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LPFOR_CONTEXT fc = NULL;
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/* Get the next element of the FOR's list */
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static BOOL GetNextElement(TCHAR **pStart, TCHAR **pEnd)
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{
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TCHAR *p = *pEnd;
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BOOL InQuotes = FALSE;
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while (_istspace(*p))
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p++;
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if (!*p)
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return FALSE;
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*pStart = p;
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while (*p && (InQuotes || !_istspace(*p)))
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InQuotes ^= (*p++ == _T('"'));
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*pEnd = p;
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return TRUE;
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}
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/* Execute a single instance of a FOR command */
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static INT RunInstance(PARSED_COMMAND *Cmd)
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{
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if (bEcho && !bDisableBatchEcho && Cmd->Subcommands->Type != C_QUIET)
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{
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if (!bIgnoreEcho)
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ConOutChar(_T('\n'));
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PrintPrompt();
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EchoCommand(Cmd->Subcommands);
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ConOutChar(_T('\n'));
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}
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/* Just run the command (variable expansion is done in DoDelayedExpansion) */
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return ExecuteCommand(Cmd->Subcommands);
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}
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/* Check if this FOR should be terminated early */
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static BOOL Exiting(PARSED_COMMAND *Cmd)
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{
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/* Someone might have removed our context */
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return bCtrlBreak || fc != Cmd->For.Context;
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}
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/* Read the contents of a text file into memory,
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* dynamically allocating enough space to hold it all */
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static LPTSTR ReadFileContents(FILE *InputFile, TCHAR *Buffer)
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{
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DWORD Len = 0;
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DWORD AllocLen = 1000;
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LPTSTR Contents = cmd_alloc(AllocLen * sizeof(TCHAR));
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if (!Contents)
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return NULL;
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while (_fgetts(Buffer, CMDLINE_LENGTH, InputFile))
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{
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DWORD CharsRead = _tcslen(Buffer);
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while (Len + CharsRead >= AllocLen)
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{
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Contents = cmd_realloc(Contents, (AllocLen *= 2) * sizeof(TCHAR));
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if (!Contents)
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return NULL;
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}
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_tcscpy(&Contents[Len], Buffer);
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Len += CharsRead;
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}
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Contents[Len] = _T('\0');
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return Contents;
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}
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static INT ForF(PARSED_COMMAND *Cmd, LPTSTR List, TCHAR *Buffer)
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{
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LPTSTR Delims = _T(" \t");
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TCHAR Eol = _T(';');
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INT SkipLines = 0;
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DWORD Tokens = (1 << 1);
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BOOL RemainderVar = FALSE;
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TCHAR StringQuote = _T('"');
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TCHAR CommandQuote = _T('\'');
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LPTSTR Variables[32];
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TCHAR *Start, *End;
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INT i;
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INT Ret = 0;
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if (Cmd->For.Params)
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{
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TCHAR Quote = 0;
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TCHAR *Param = Cmd->For.Params;
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if (*Param == _T('"') || *Param == _T('\''))
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Quote = *Param++;
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while (*Param && *Param != Quote)
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{
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if (*Param <= _T(' '))
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{
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Param++;
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}
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else if (_tcsnicmp(Param, _T("delims="), 7) == 0)
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{
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Param += 7;
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/* delims=xxx: Specifies the list of characters that separate tokens */
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Delims = Param;
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while (*Param && *Param != Quote)
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{
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if (*Param == _T(' '))
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{
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TCHAR *FirstSpace = Param;
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Param += _tcsspn(Param, _T(" "));
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/* Exclude trailing spaces if this is not the last parameter */
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if (*Param && *Param != Quote)
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*FirstSpace = _T('\0');
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break;
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}
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Param++;
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}
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if (*Param == Quote)
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*Param++ = _T('\0');
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}
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else if (_tcsnicmp(Param, _T("eol="), 4) == 0)
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{
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Param += 4;
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/* eol=c: Lines starting with this character (may be
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* preceded by delimiters) are skipped. */
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Eol = *Param;
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if (Eol != _T('\0'))
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Param++;
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}
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else if (_tcsnicmp(Param, _T("skip="), 5) == 0)
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{
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/* skip=n: Number of lines to skip at the beginning of each file */
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SkipLines = _tcstol(Param + 5, &Param, 0);
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if (SkipLines <= 0)
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goto error;
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}
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else if (_tcsnicmp(Param, _T("tokens="), 7) == 0)
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{
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Param += 7;
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/* tokens=x,y,m-n: List of token numbers (must be between
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* 1 and 31) that will be assigned into variables. */
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Tokens = 0;
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while (*Param && *Param != Quote && *Param != _T('*'))
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{
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INT First = _tcstol(Param, &Param, 0);
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INT Last = First;
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if (First < 1)
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goto error;
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if (*Param == _T('-'))
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{
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/* It's a range of tokens */
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Last = _tcstol(Param + 1, &Param, 0);
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if (Last < First || Last > 31)
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goto error;
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}
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Tokens |= (2 << Last) - (1 << First);
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if (*Param != _T(','))
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break;
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Param++;
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}
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/* With an asterisk at the end, an additional variable
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* will be created to hold the remainder of the line
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* (after the last token specified). */
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if (*Param == _T('*'))
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{
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RemainderVar = TRUE;
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Param++;
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}
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}
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else if (_tcsnicmp(Param, _T("useback"), 7) == 0)
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{
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Param += 7;
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/* usebackq: Use alternate quote characters */
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StringQuote = _T('\'');
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CommandQuote = _T('`');
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/* Can be written as either "useback" or "usebackq" */
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if (_totlower(*Param) == _T('q'))
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Param++;
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}
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else
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{
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error:
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error_syntax(Param);
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return 1;
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}
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}
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}
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/* Count how many variables will be set: one for each token,
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* plus maybe one for the remainder */
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fc->varcount = RemainderVar;
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for (i = 1; i < 32; i++)
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fc->varcount += (Tokens >> i & 1);
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fc->values = Variables;
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if (*List == StringQuote || *List == CommandQuote)
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{
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/* Treat the entire "list" as one single element */
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Start = List;
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End = &List[_tcslen(List)];
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goto single_element;
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}
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End = List;
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while (GetNextElement(&Start, &End))
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{
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FILE *InputFile;
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LPTSTR FullInput, In, NextLine;
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INT Skip;
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single_element:
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if (*Start == StringQuote && End[-1] == StringQuote)
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{
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/* Input given directly as a string */
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End[-1] = _T('\0');
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FullInput = cmd_dup(Start + 1);
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}
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else if (*Start == CommandQuote && End[-1] == CommandQuote)
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{
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/* Read input from a command */
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End[-1] = _T('\0');
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InputFile = _tpopen(Start + 1, _T("r"));
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if (!InputFile)
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{
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error_bad_command(Start + 1);
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return 1;
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}
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FullInput = ReadFileContents(InputFile, Buffer);
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_pclose(InputFile);
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}
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else
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{
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/* Read input from a file */
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TCHAR Temp = *End;
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*End = _T('\0');
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StripQuotes(Start);
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InputFile = _tfopen(Start, _T("r"));
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*End = Temp;
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if (!InputFile)
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{
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error_sfile_not_found(Start);
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return 1;
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}
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FullInput = ReadFileContents(InputFile, Buffer);
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fclose(InputFile);
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}
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if (!FullInput)
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{
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error_out_of_memory();
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return 1;
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}
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/* Loop over the input line by line */
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In = FullInput;
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Skip = SkipLines;
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do
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{
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DWORD RemainingTokens = Tokens;
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LPTSTR *CurVar = Variables;
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NextLine = _tcschr(In, _T('\n'));
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if (NextLine)
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*NextLine++ = _T('\0');
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if (--Skip >= 0)
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continue;
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|
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/* Ignore lines where the first token starts with the eol character */
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In += _tcsspn(In, Delims);
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if (*In == Eol)
|
||||
continue;
|
||||
|
||||
while ((RemainingTokens >>= 1) != 0)
|
||||
{
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||||
/* Save pointer to this token in a variable if requested */
|
||||
if (RemainingTokens & 1)
|
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*CurVar++ = In;
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||||
/* Find end of token */
|
||||
In += _tcscspn(In, Delims);
|
||||
/* Nul-terminate it and advance to next token */
|
||||
if (*In)
|
||||
{
|
||||
*In++ = _T('\0');
|
||||
In += _tcsspn(In, Delims);
|
||||
}
|
||||
}
|
||||
/* Save pointer to remainder of line */
|
||||
*CurVar = In;
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|
||||
/* Don't run unless the line had enough tokens to fill at least one variable */
|
||||
if (*Variables[0])
|
||||
Ret = RunInstance(Cmd);
|
||||
} while (!Exiting(Cmd) && (In = NextLine) != NULL);
|
||||
cmd_free(FullInput);
|
||||
}
|
||||
|
||||
return Ret;
|
||||
}
|
||||
|
||||
/* FOR /L: Do a numeric loop */
|
||||
static INT ForLoop(PARSED_COMMAND *Cmd, LPTSTR List, TCHAR *Buffer)
|
||||
{
|
||||
enum { START, STEP, END };
|
||||
INT params[3] = { 0, 0, 0 };
|
||||
INT i;
|
||||
INT Ret = 0;
|
||||
|
||||
TCHAR *Start, *End = List;
|
||||
for (i = 0; i < 3 && GetNextElement(&Start, &End); i++)
|
||||
params[i] = _tcstol(Start, NULL, 0);
|
||||
|
||||
i = params[START];
|
||||
while (!Exiting(Cmd) &&
|
||||
(params[STEP] >= 0 ? (i <= params[END]) : (i >= params[END])))
|
||||
{
|
||||
_itot(i, Buffer, 10);
|
||||
Ret = RunInstance(Cmd);
|
||||
i += params[STEP];
|
||||
}
|
||||
return Ret;
|
||||
}
|
||||
|
||||
/* Process a FOR in one directory. Stored in Buffer (up to BufPos) is a
|
||||
* string which is prefixed to each element of the list. In a normal FOR
|
||||
* it will be empty, but in FOR /R it will be the directory name. */
|
||||
static INT ForDir(PARSED_COMMAND *Cmd, LPTSTR List, TCHAR *Buffer, TCHAR *BufPos)
|
||||
{
|
||||
TCHAR *Start, *End = List;
|
||||
INT Ret = 0;
|
||||
while (!Exiting(Cmd) && GetNextElement(&Start, &End))
|
||||
{
|
||||
if (BufPos + (End - Start) > &Buffer[CMDLINE_LENGTH])
|
||||
continue;
|
||||
memcpy(BufPos, Start, (End - Start) * sizeof(TCHAR));
|
||||
BufPos[End - Start] = _T('\0');
|
||||
|
||||
if (_tcschr(BufPos, _T('?')) || _tcschr(BufPos, _T('*')))
|
||||
{
|
||||
WIN32_FIND_DATA w32fd;
|
||||
HANDLE hFind;
|
||||
TCHAR *FilePart;
|
||||
|
||||
StripQuotes(BufPos);
|
||||
hFind = FindFirstFile(Buffer, &w32fd);
|
||||
if (hFind == INVALID_HANDLE_VALUE)
|
||||
continue;
|
||||
FilePart = _tcsrchr(BufPos, _T('\\'));
|
||||
FilePart = FilePart ? FilePart + 1 : BufPos;
|
||||
do
|
||||
{
|
||||
if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN)
|
||||
continue;
|
||||
if (!(w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
|
||||
!= !(Cmd->For.Switches & FOR_DIRS))
|
||||
continue;
|
||||
if (_tcscmp(w32fd.cFileName, _T(".")) == 0 ||
|
||||
_tcscmp(w32fd.cFileName, _T("..")) == 0)
|
||||
continue;
|
||||
_tcscpy(FilePart, w32fd.cFileName);
|
||||
Ret = RunInstance(Cmd);
|
||||
} while (!Exiting(Cmd) && FindNextFile(hFind, &w32fd));
|
||||
FindClose(hFind);
|
||||
}
|
||||
else
|
||||
{
|
||||
Ret = RunInstance(Cmd);
|
||||
}
|
||||
}
|
||||
return Ret;
|
||||
}
|
||||
|
||||
/* FOR /R: Process a FOR in each directory of a tree, recursively. */
|
||||
static INT ForRecursive(PARSED_COMMAND *Cmd, LPTSTR List, TCHAR *Buffer, TCHAR *BufPos)
|
||||
{
|
||||
HANDLE hFind;
|
||||
WIN32_FIND_DATA w32fd;
|
||||
INT Ret = 0;
|
||||
|
||||
if (BufPos[-1] != _T('\\'))
|
||||
{
|
||||
*BufPos++ = _T('\\');
|
||||
*BufPos = _T('\0');
|
||||
}
|
||||
|
||||
Ret = ForDir(Cmd, List, Buffer, BufPos);
|
||||
|
||||
_tcscpy(BufPos, _T("*"));
|
||||
hFind = FindFirstFile(Buffer, &w32fd);
|
||||
if (hFind == INVALID_HANDLE_VALUE)
|
||||
return Ret;
|
||||
do
|
||||
{
|
||||
if (!(w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
|
||||
continue;
|
||||
if (_tcscmp(w32fd.cFileName, _T(".")) == 0 ||
|
||||
_tcscmp(w32fd.cFileName, _T("..")) == 0)
|
||||
continue;
|
||||
Ret = ForRecursive(Cmd, List, Buffer, _stpcpy(BufPos, w32fd.cFileName));
|
||||
} while (!Exiting(Cmd) && FindNextFile(hFind, &w32fd));
|
||||
FindClose(hFind);
|
||||
return Ret;
|
||||
}
|
||||
|
||||
BOOL
|
||||
ExecuteFor(PARSED_COMMAND *Cmd)
|
||||
{
|
||||
TCHAR Buffer[CMDLINE_LENGTH]; /* Buffer to hold the variable value */
|
||||
LPTSTR BufferPtr = Buffer;
|
||||
LPFOR_CONTEXT lpNew;
|
||||
INT Ret;
|
||||
LPTSTR List = DoDelayedExpansion(Cmd->For.List);
|
||||
|
||||
if (!List)
|
||||
return 1;
|
||||
|
||||
/* Create our FOR context */
|
||||
lpNew = cmd_alloc(sizeof(FOR_CONTEXT));
|
||||
if (!lpNew)
|
||||
{
|
||||
cmd_free(List);
|
||||
return 1;
|
||||
}
|
||||
lpNew->prev = fc;
|
||||
lpNew->firstvar = Cmd->For.Variable;
|
||||
lpNew->varcount = 1;
|
||||
lpNew->values = &BufferPtr;
|
||||
|
||||
Cmd->For.Context = lpNew;
|
||||
fc = lpNew;
|
||||
|
||||
if (Cmd->For.Switches & FOR_F)
|
||||
{
|
||||
Ret = ForF(Cmd, List, Buffer);
|
||||
}
|
||||
else if (Cmd->For.Switches & FOR_LOOP)
|
||||
{
|
||||
Ret = ForLoop(Cmd, List, Buffer);
|
||||
}
|
||||
else if (Cmd->For.Switches & FOR_RECURSIVE)
|
||||
{
|
||||
DWORD Len = GetFullPathName(Cmd->For.Params ? Cmd->For.Params : _T("."),
|
||||
MAX_PATH, Buffer, NULL);
|
||||
Ret = ForRecursive(Cmd, List, Buffer, &Buffer[Len]);
|
||||
}
|
||||
else
|
||||
{
|
||||
Ret = ForDir(Cmd, List, Buffer, Buffer);
|
||||
}
|
||||
|
||||
/* Remove our context, unless someone already did that */
|
||||
if (fc == lpNew)
|
||||
fc = lpNew->prev;
|
||||
|
||||
cmd_free(lpNew);
|
||||
cmd_free(List);
|
||||
return Ret;
|
||||
}
|
||||
|
||||
/* EOF */
|
||||
Loading…
Add table
Add a link
Reference in a new issue