/***
*vsprintf.c - print formatted data into a string from var arg list
*
* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines vsprintf() and _vsnprintf() - print formatted output to
* a string, get the data from an argument ptr instead of explicit
* arguments.
*
*Revision History:
* 09-02-83 RN original sprintf
* 06-17-85 TC rewrote to use new varargs macros, and to be vsprintf
* 04-13-87 JCR added const to declaration
* 11-07-87 JCR Multi-thread support
* 12-11-87 JCR Added "_LOAD_DS" to declaration
* 05-27-88 PHG Merged DLL and normal versions
* 06-13-88 JCR Fake _iob entry is now static so that other routines
* can assume _iob entries are in DGROUP.
* 08-25-88 GJF Define MAXSTR to be INT_MAX (from LIMITS.H).
* 06-06-89 JCR 386 mthread support
* 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.
* 09-24-91 JCR Added _vsnprintf()
*
*******************************************************************************/
#include <cruntime.h>
#include <stdio.h>
#include <assert.h>
#include <stdarg.h>
#include <internal.h>
#include <limits.h>
#include <os2dll.h>
#define MAXSTR INT_MAX
/***
#ifndef _COUNT_
*int vsprintf(string, format, ap) - print formatted data to string from arg ptr
#else
*int _vsnprintf(string, format, ap) - print formatted data to string from arg ptr
#endif
*
*Purpose:
* Prints formatted data, but to a string and gets data from an argument
* pointer.
* Sets up a FILE so file i/o operations can be used, make string look
* like a huge buffer to it, but _flsbuf will refuse to flush it if it
* fills up. Appends '\0' to make it a true string.
*
* Allocate the 'fake' _iob[] entryit statically instead of on
* the stack so that other routines can assume that _iob[] entries are in
* are in DGROUP and, thus, are near.
*
#ifdef _COUNT_
* The _vsnprintf() flavor takes a count argument that is
* the max number of bytes that should be written to the
* user's buffer.
#endif
*
* Multi-thread: (1) Since there is no stream, this routine must never try
* to get the stream lock (i.e., there is no stream lock either). (2)
* Also, since there is only one staticly allocated 'fake' iob, we must
* lock/unlock to prevent collisions.
*
*Entry:
* char *string - place to put destination string
#ifdef _COUNT_
* size_t count - max number of bytes to put in buffer
#endif
* char *format - format string, describes format of data
* va_list ap - varargs argument pointer
*
*Exit:
* returns number of characters in string
*
*Exceptions:
*
*******************************************************************************/
#ifndef _COUNT_
int _CALLTYPE1 vsprintf (
char *string,
const char *format,
va_list ap
)
#else
int _CALLTYPE1 _vsnprintf (
char *string,
size_t count,
const char *format,
va_list ap
)
#endif
{
FILE str;
REG1 FILE *outfile = &str;
REG2 int retval;
assert(string != NULL);
assert(format != NULL);
outfile->_flag = _IOWRT|_IOSTRG;
outfile->_ptr = outfile->_base = string;
#ifndef _COUNT_
outfile->_cnt = MAXSTR;
#else
outfile->_cnt = count;
#endif
retval = _output(outfile,format,ap );
_putc_lk('\0',outfile);
return(retval);
}
