72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/* Formatted output to a stream.
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Copyright (C) 2004, 2006-2025 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#if 1
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# include <config.h>
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#endif
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/* Specification. */
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#include <stdio.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include "fseterr.h"
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#include "intprops.h"
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#include "vasnprintf.h"
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off64_t
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vfzprintf (FILE *fp, const char *format, va_list args)
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{
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char buf[2000];
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char *output;
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size_t len;
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size_t lenbuf = sizeof (buf);
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output = vasnprintf (buf, &lenbuf, format, args);
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len = lenbuf;
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if (!output)
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{
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fseterr (fp);
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return -1;
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}
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if (len > TYPE_MAXIMUM (off64_t))
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{
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/* We could write the (huge) output, but then could not return len, as it
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would be negative. Treat this case as if vasnprintf had already
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encountered an out-of-memory situation. */
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if (output != buf)
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free (output);
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fseterr (fp);
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errno = ENOMEM;
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return -1;
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}
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if (fwrite (output, 1, len, fp) < len)
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{
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if (output != buf)
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free (output);
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return -1;
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}
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if (output != buf)
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free (output);
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return len;
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}
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