/* Formatted output to a stream. Copyright (C) 2004, 2006-2022 Free Software Foundation, Inc. This file is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This file is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see . */ #ifdef HAVE_CONFIG_H # include #endif /* Specification. */ #include #include #include #include #include #include "fseterr.h" #include "vasnprintf.h" /* Print formatted output to the stream FP. Return string length of formatted string. On error, return a negative value. */ int fprintf (FILE *fp, const char *format, ...) { char buf[2000]; char *output; size_t len; size_t lenbuf = sizeof (buf); va_list args; va_start (args, format); output = vasnprintf (buf, &lenbuf, format, args); len = lenbuf; va_end (args); if (!output) { fseterr (fp); return -1; } if (fwrite (output, 1, len, fp) < len) { if (output != buf) free (output); return -1; } if (output != buf) free (output); if (len > INT_MAX) { errno = EOVERFLOW; fseterr (fp); return -1; } return len; }