Plan 9 from Bell Labs’s /usr/web/sources/patch/maybe/ape-updates/vsnprintf.c

Copyright © 2021 Plan 9 Foundation.
Distributed under the MIT License.
Download the Plan 9 distribution.


/*
 * pANS stdio -- vsnprintf
 */
#define _C99_SNPRINTF_EXTENSION

#include "iolib.h"

int vsnprintf(char *buf, size_t nbuf, const char *fmt, va_list args){
	int n;
	FILE *f=_IO_sopenw();
	if(f==NULL)
		return 0;
	setvbuf(f, buf, _IOFBF, nbuf);
	n=vfprintf(f, fmt, args);
	_IO_sclose(f);
	return n;
}

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