106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
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/***
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*gets.c - read a line from stdin
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines gets() and getws() - read a line from stdin into buffer
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*
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*Revision History:
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* 09-02-83 RN initial version
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* 11-06-87 JCR Multi-thread support
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* 12-11-87 JCR Added "_LOAD_DS" to declaration
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* 05-27-88 PHG Merged DLL and normal versions
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* 02-15-90 GJF Fixed copyright, indents
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* 03-19-90 GJF Replaced _LOAD_DS with _CALLTYPE1, added #include
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* <cruntime.h> and removed #include <register.h>.
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* 07-24-90 SBM Replaced <assertm.h> by <assert.h>
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* 08-14-90 SBM Compiles cleanly with -W3
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* 10-02-90 GJF New-style function declarator.
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* 04-06-93 SKS Replace _CRTAPI* with __cdecl
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* 01-31-94 CFW Unicode enable.
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* 09-06-94 CFW Replace MTHREAD with _MT.
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* 02-06-94 CFW assert -> _ASSERTE.
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* 02-22-95 GJF Replaced WPRFLAG with _UNICODE.
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* 03-07-95 GJF Use _[un]lock_str2 instead of _[un]lock_str. Also,
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* removed useless local and macros.
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* 03-02-98 GJF Exception-safe locking.
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <stdio.h>
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#include <dbgint.h>
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#include <file2.h>
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#include <mtdll.h>
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#include <tchar.h>
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/***
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*char *gets(string) - read a line from stdin
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*
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*Purpose:
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* Gets a string from stdin terminated by '\n' or EOF; don't include '\n';
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* append '\0'.
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*
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*Entry:
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* char *string - place to store read string, assumes enough room.
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*
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*Exit:
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* returns string, filled in with the line of input
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* null string if \n found immediately
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* NULL if EOF found immediately
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*
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*Exceptions:
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*
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*******************************************************************************/
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_TCHAR * __cdecl _getts (
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_TCHAR *string
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)
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{
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int ch;
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_TCHAR *pointer = string;
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_TCHAR *retval = string;
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_ASSERTE(string != NULL);
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#ifdef _MT
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_lock_str2(0, stdin);
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__try {
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#endif
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#ifdef _UNICODE
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while ((ch = _getwchar_lk()) != L'\n')
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#else
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while ((ch = _getchar_lk()) != '\n')
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#endif
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{
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if (ch == _TEOF)
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{
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if (pointer == string)
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{
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retval = NULL;
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goto done;
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}
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break;
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}
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*pointer++ = (_TCHAR)ch;
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}
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*pointer = _T('\0');
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/* Common return */
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done:
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#ifdef _MT
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; }
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__finally {
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_unlock_str2(0, stdin);
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}
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#endif
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return(retval);
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}
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