1/* __gmp_fprintf_funs -- support for formatted output to FILEs. 2 3 THE FUNCTIONS IN THIS FILE ARE FOR INTERNAL USE ONLY. THEY'RE ALMOST 4 CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR DISAPPEAR COMPLETELY IN 5 FUTURE GNU MP RELEASES. 6 7Copyright 2001 Free Software Foundation, Inc. 8 9This file is part of the GNU MP Library. 10 11The GNU MP Library is free software; you can redistribute it and/or modify 12it under the terms of either: 13 14 * the GNU Lesser General Public License as published by the Free 15 Software Foundation; either version 3 of the License, or (at your 16 option) any later version. 17 18or 19 20 * the GNU General Public License as published by the Free Software 21 Foundation; either version 2 of the License, or (at your option) any 22 later version. 23 24or both in parallel, as here. 25 26The GNU MP Library is distributed in the hope that it will be useful, but 27WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 28or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 29for more details. 30 31You should have received copies of the GNU General Public License and the 32GNU Lesser General Public License along with the GNU MP Library. If not, 33see https://www.gnu.org/licenses/. */ 34 35#include <stdarg.h> 36#include <stdio.h> 37#include <string.h> 38 39#include "gmp-impl.h" 40 41/* SunOS 4 stdio.h doesn't provide a prototype for this */ 42#if ! HAVE_DECL_VFPRINTF 43int vfprintf (FILE *, const char *, va_list); 44#endif 45 46 47static int 48gmp_fprintf_memory (FILE *fp, const char *str, size_t len) 49{ 50 return fwrite (str, 1, len, fp); 51} 52 53/* glibc putc is a function, at least when it's in multi-threaded mode or 54 some such, so fwrite chunks instead of making many calls. */ 55static int 56gmp_fprintf_reps (FILE *fp, int c, int reps) 57{ 58 char buf[256]; 59 int i, piece, ret; 60 ASSERT (reps >= 0); 61 62 memset (buf, c, MIN (reps, sizeof (buf))); 63 for (i = reps; i > 0; i -= sizeof (buf)) 64 { 65 piece = MIN (i, sizeof (buf)); 66 ret = fwrite (buf, 1, piece, fp); 67 if (ret == -1) 68 return ret; 69 ASSERT (ret == piece); 70 } 71 72 return reps; 73} 74 75const struct doprnt_funs_t __gmp_fprintf_funs = { 76 (doprnt_format_t) vfprintf, 77 (doprnt_memory_t) gmp_fprintf_memory, 78 (doprnt_reps_t) gmp_fprintf_reps, 79}; 80