1 /* Support for operator<< routines. 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 <iostream> 25 #include <stdarg.h> /* for va_list and hence doprnt_funs_t */ 26 #include <string.h> 27 28 #include "gmp.h" 29 #include "gmp-impl.h" 30 31 using namespace std; 32 33 34 /* Don't need "format" for operator<< routines, just "memory" and "reps". 35 Omitting gmp_asprintf_format lets us avoid dragging vsnprintf into the 36 link. __gmp_asprintf_final will be called directly and doesn't need to 37 be in the struct. */ 38 39 const struct doprnt_funs_t __gmp_asprintf_funs_noformat = { 40 NULL, 41 (doprnt_memory_t) __gmp_asprintf_memory, 42 (doprnt_reps_t) __gmp_asprintf_reps, 43 NULL 44 }; 45 46 47 void 48 __gmp_doprnt_params_from_ios (struct doprnt_params_t *p, ios &o) 49 { 50 if ((o.flags() & ios::basefield) == ios::hex) 51 { 52 p->expfmt = "@%c%02d"; 53 p->base = (o.flags() & ios::uppercase ? -16 : 16); 54 } 55 else 56 { 57 p->expfmt = (o.flags() & ios::uppercase ? "E%c%02d" : "e%c%02d"); 58 if ((o.flags() & ios::basefield) == ios::oct) 59 p->base = 8; 60 else 61 p->base = 10; 62 } 63 64 /* "general" if none or more than one bit set */ 65 if ((o.flags() & ios::floatfield) == ios::fixed) 66 p->conv = DOPRNT_CONV_FIXED; 67 else if ((o.flags() & ios::floatfield) == ios::scientific) 68 p->conv = DOPRNT_CONV_SCIENTIFIC; 69 else 70 p->conv = DOPRNT_CONV_GENERAL; 71 72 p->exptimes4 = 0; 73 74 p->fill = o.fill(); 75 76 /* "right" if more than one bit set */ 77 if ((o.flags() & ios::adjustfield) == ios::left) 78 p->justify = DOPRNT_JUSTIFY_LEFT; 79 else if ((o.flags() & ios::adjustfield) == ios::internal) 80 p->justify = DOPRNT_JUSTIFY_INTERNAL; 81 else 82 p->justify = DOPRNT_JUSTIFY_RIGHT; 83 84 /* ios::fixed allows prec==0, others take 0 as the default 6. 85 Don't allow negatives (they do bad things to __gmp_doprnt_float_cxx). */ 86 p->prec = MAX (0, o.precision()); 87 if (p->prec == 0 && p->conv != DOPRNT_CONV_FIXED) 88 p->prec = 6; 89 90 /* for hex showbase is always, for octal only non-zero */ 91 if (o.flags() & ios::showbase) 92 p->showbase = ((o.flags() & ios::basefield) == ios::hex 93 ? DOPRNT_SHOWBASE_YES : DOPRNT_SHOWBASE_NONZERO); 94 else 95 p->showbase = DOPRNT_SHOWBASE_NO; 96 97 p->showpoint = ((o.flags() & ios::showpoint) != 0); 98 99 /* in fixed and scientific always show trailing zeros, in general format 100 show them if showpoint is set (or so it seems) */ 101 if ((o.flags() & ios::floatfield) == ios::fixed 102 || (o.flags() & ios::floatfield) == ios::scientific) 103 p->showtrailing = 1; 104 else 105 p->showtrailing = p->showpoint; 106 107 p->sign = (o.flags() & ios::showpos ? '+' : '\0'); 108 109 p->width = o.width(); 110 111 /* reset on each output */ 112 o.width (0); 113 } 114