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/***
*vfprintf.c - fprintf from variable arg list
*
* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines vfprintf() - print formatted output, but take args from
* a stdargs pointer.
*
*Revision History:
* 09-02-83 RN original fprintf
* 06-17-85 TC rewrote to use new varargs macros, and to be vfprintf
* 04-13-87 JCR added const to declaration
* 11-06-87 JCR Multi-thread support
* 12-11-87 JCR Added "_LOAD_DS" to declaration
* 05-31-88 PHG Merged DLL and normal versions
* 06-15-88 JCR Near reference to _iob[] entries; improve REG variables
* 08-25-88 GJF Don't use FP_OFF() macro for the 386
* 08-18-89 GJF Clean up, now specific to OS/2 2.0 (i.e., 386 flat
* model). Also fixed copyright and indents.
* 02-16-90 GJF Fixed copyright
* 03-20-90 GJF Made calling type _CALLTYPE1, added #include
* <cruntime.h> and removed #include <register.h>.
* 07-25-90 SBM Replaced <assertm.h> by <assert.h>, <varargs.h> by
* <stdarg.h>
* 10-03-90 GJF New-style function declarator.
*
*******************************************************************************/
#include <cruntime.h>
#include <stdio.h>
#include <assert.h>
#include <stdarg.h>
#include <file2.h>
#include <internal.h>
#include <os2dll.h>
/***
*int vfprintf(stream, format, ap) - print to file from varargs
*
*Purpose:
* Performs formatted output to a file. The arg list is a variable
* argument list pointer.
*
*Entry:
* FILE *stream - stream to write data to
* char *format - format string containing data format
* va_list ap - variable arg list pointer
*
*Exit:
* returns number of correctly output characters
* returns negative number if error occurred
*
*Exceptions:
*
*******************************************************************************/
int _CALLTYPE1 vfprintf (
FILE *str,
const char *format,
va_list ap
)
/*
* 'V'ariable argument 'F'ile (stream) 'PRINT', 'F'ormatted
*/
{
REG1 FILE *stream;
REG2 int buffing;
REG3 int retval;
#ifdef MTHREAD
int index;
#endif
assert(str != NULL);
assert(format != NULL);
/* Init stream pointer */
stream = str;
#ifdef MTHREAD
index=_iob_index(stream);
#endif
_lock_str(index);
buffing = _stbuf(stream);
retval = _output(stream,format,ap );
_ftbuf(buffing, stream);
_unlock_str(index);
return(retval);
}
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