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98 lines
2.9 KiB
98 lines
2.9 KiB
/***
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*vfprintf.c - fprintf from variable arg list
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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 vfprintf() - print formatted output, but take args from
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* a stdargs pointer.
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*
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*Revision History:
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* 09-02-83 RN original fprintf
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* 06-17-85 TC rewrote to use new varargs macros, and to be vfprintf
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* 04-13-87 JCR added const to declaration
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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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* 05-31-88 PHG Merged DLL and normal versions
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* 06-15-88 JCR Near reference to _iob[] entries; improve REG variables
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* 08-25-88 GJF Don't use FP_OFF() macro for the 386
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* 08-18-89 GJF Clean up, now specific to OS/2 2.0 (i.e., 386 flat
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* model). Also fixed copyright and indents.
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* 02-16-90 GJF Fixed copyright
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* 03-20-90 GJF Made calling type _CALLTYPE1, added #include
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* <cruntime.h> and removed #include <register.h>.
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* 07-25-90 SBM Replaced <assertm.h> by <assert.h>, <varargs.h> by
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* <stdarg.h>
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* 10-03-90 GJF New-style function declarator.
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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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* 03-07-95 GJF _[un]lock_str macros now take FILE * arg.
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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 <stdarg.h>
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#include <file2.h>
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#include <internal.h>
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#include <mtdll.h>
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/***
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*int vfprintf(stream, format, ap) - print to file from varargs
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*
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*Purpose:
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* Performs formatted output to a file. The arg list is a variable
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* argument list pointer.
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*
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*Entry:
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* FILE *stream - stream to write data to
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* char *format - format string containing data format
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* va_list ap - variable arg list pointer
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*
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*Exit:
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* returns number of correctly output characters
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* returns negative number if error occurred
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*
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*Exceptions:
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*
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*******************************************************************************/
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int __cdecl vfprintf (
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FILE *str,
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const char *format,
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va_list ap
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)
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/*
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* 'V'ariable argument 'F'ile (stream) 'PRINT', 'F'ormatted
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*/
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{
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REG1 FILE *stream;
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REG2 int buffing;
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REG3 int retval;
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_ASSERTE(str != NULL);
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_ASSERTE(format != NULL);
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/* Init stream pointer */
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stream = str;
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#ifdef _MT
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_lock_str(stream);
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__try {
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#endif
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buffing = _stbuf(stream);
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retval = _output(stream,format,ap );
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_ftbuf(buffing, stream);
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#ifdef _MT
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}
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__finally {
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_unlock_str(stream);
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}
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#endif
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return(retval);
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}
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