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Annotation of OpenXM_contrib/gmp/cxx/osfuns.cc, Revision 1.1

1.1     ! ohara       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 2.1 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; see the file COPYING.LIB.  If not, write to
        !            23: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            24: MA 02111-1307, USA. */
        !            25:
        !            26: #include <iostream>
        !            27: #include <stdarg.h>    /* for va_list and hence doprnt_funs_t */
        !            28: #include <string.h>
        !            29:
        !            30: #include "gmp.h"
        !            31: #include "gmp-impl.h"
        !            32:
        !            33: using namespace std;
        !            34:
        !            35:
        !            36: /* Don't need "format" for operator<< routines, just "memory" and "reps".
        !            37:    Omitting gmp_asprintf_format lets us avoid dragging vsnprintf into the
        !            38:    link.  __gmp_asprintf_final will be called directly and doesn't need to
        !            39:    be in the struct.  */
        !            40:
        !            41: const struct doprnt_funs_t  __gmp_asprintf_funs_noformat = {
        !            42:   NULL,
        !            43:   (doprnt_memory_t) __gmp_asprintf_memory,
        !            44:   (doprnt_reps_t)   __gmp_asprintf_reps,
        !            45:   NULL
        !            46: };
        !            47:
        !            48:
        !            49: void
        !            50: __gmp_doprnt_params_from_ios (struct doprnt_params_t *p, ios &o)
        !            51: {
        !            52:   if ((o.flags() & ios::basefield) == ios::hex)
        !            53:     {
        !            54:       p->expfmt = "@%c%02d";
        !            55:       p->base = (o.flags() & ios::uppercase ? -16 : 16);
        !            56:     }
        !            57:   else
        !            58:     {
        !            59:       p->expfmt = (o.flags() & ios::uppercase ? "E%c%02d" : "e%c%02d");
        !            60:       if ((o.flags() & ios::basefield) == ios::oct)
        !            61:         p->base = 8;
        !            62:       else
        !            63:         p->base = 10;
        !            64:     }
        !            65:
        !            66:   /* "general" if none or more than one bit set */
        !            67:   if ((o.flags() & ios::floatfield) == ios::fixed)
        !            68:     p->conv = DOPRNT_CONV_FIXED;
        !            69:   else if ((o.flags() & ios::floatfield) == ios::scientific)
        !            70:     p->conv = DOPRNT_CONV_SCIENTIFIC;
        !            71:   else
        !            72:     p->conv = DOPRNT_CONV_GENERAL;
        !            73:
        !            74:   p->exptimes4 = 0;
        !            75:
        !            76:   p->fill = o.fill();
        !            77:
        !            78:   /* "right" if more than one bit set */
        !            79:   if ((o.flags() & ios::adjustfield) == ios::left)
        !            80:     p->justify = DOPRNT_JUSTIFY_LEFT;
        !            81:   else if ((o.flags() & ios::adjustfield) == ios::internal)
        !            82:     p->justify = DOPRNT_JUSTIFY_INTERNAL;
        !            83:   else
        !            84:     p->justify = DOPRNT_JUSTIFY_RIGHT;
        !            85:
        !            86:   /* ios::fixed allows prec==0, others take 0 as the default 6.
        !            87:      Don't allow negatives (they do bad things to __gmp_doprnt_float_cxx).  */
        !            88:   p->prec = MAX (0, o.precision());
        !            89:   if (p->prec == 0 && p->conv != DOPRNT_CONV_FIXED)
        !            90:     p->prec = 6;
        !            91:
        !            92:   /* for hex showbase is always, for octal only non-zero */
        !            93:   if (o.flags() & ios::showbase)
        !            94:     p->showbase = ((o.flags() & ios::basefield) == ios::hex
        !            95:                    ? DOPRNT_SHOWBASE_YES : DOPRNT_SHOWBASE_NONZERO);
        !            96:   else
        !            97:     p->showbase = DOPRNT_SHOWBASE_NO;
        !            98:
        !            99:   p->showpoint = ((o.flags() & ios::showpoint) != 0);
        !           100:
        !           101:   /* in fixed and scientific always show trailing zeros, in general format
        !           102:      show them if showpoint is set (or so it seems) */
        !           103:   if ((o.flags() & ios::floatfield) == ios::fixed
        !           104:       || (o.flags() & ios::floatfield) == ios::scientific)
        !           105:     p->showtrailing = 1;
        !           106:   else
        !           107:     p->showtrailing = p->showpoint;
        !           108:
        !           109:   p->sign = (o.flags() & ios::showpos ? '+' : '\0');
        !           110:
        !           111:   p->width = o.width();
        !           112:
        !           113:   /* reset on each output */
        !           114:   o.width (0);
        !           115: }