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