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Annotation of OpenXM_contrib/gmp/mpf/inp_str.c, Revision 1.1

1.1     ! maekawa     1: /* mpf_inp_str(dest_float, stream, base) -- Input a number in base
        !             2:    BASE from stdio stream STREAM and store the result in DEST_FLOAT.
        !             3:
        !             4: Copyright (C) 1996 Free Software Foundation, Inc.
        !             5:
        !             6: This file is part of the GNU MP Library.
        !             7:
        !             8: The GNU MP Library is free software; you can redistribute it and/or modify
        !             9: it under the terms of the GNU Library General Public License as published by
        !            10: the Free Software Foundation; either version 2 of the License, or (at your
        !            11: option) any later version.
        !            12:
        !            13: The GNU MP Library is distributed in the hope that it will be useful, but
        !            14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
        !            16: License for more details.
        !            17:
        !            18: You should have received a copy of the GNU Library General Public License
        !            19: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            21: MA 02111-1307, USA. */
        !            22:
        !            23: #include <stdio.h>
        !            24: #include <ctype.h>
        !            25: #include "gmp.h"
        !            26: #include "gmp-impl.h"
        !            27:
        !            28: size_t
        !            29: #if __STDC__
        !            30: mpf_inp_str (mpf_ptr rop, FILE *stream, int base)
        !            31: #else
        !            32: mpf_inp_str (rop, stream, base)
        !            33:      mpf_ptr rop;
        !            34:      FILE *stream;
        !            35:      int base;
        !            36: #endif
        !            37: {
        !            38:   char *str;
        !            39:   size_t alloc_size, str_size;
        !            40:   int c;
        !            41:   size_t retval;
        !            42:   size_t nread;
        !            43:
        !            44:   if (stream == 0)
        !            45:     stream = stdin;
        !            46:
        !            47:   alloc_size = 100;
        !            48:   str = (char *) (*_mp_allocate_func) (alloc_size);
        !            49:   str_size = 0;
        !            50:   nread = 0;
        !            51:
        !            52:   /* Skip whitespace.  */
        !            53:   do
        !            54:     {
        !            55:       c = getc (stream);
        !            56:       nread++;
        !            57:     }
        !            58:   while (isspace (c));
        !            59:
        !            60:   for (;;)
        !            61:     {
        !            62:       if (str_size >= alloc_size)
        !            63:        {
        !            64:          size_t old_alloc_size = alloc_size;
        !            65:          alloc_size = alloc_size * 3 / 2;
        !            66:          str = (char *) (*_mp_reallocate_func) (str, old_alloc_size, alloc_size);
        !            67:        }
        !            68:       if (c == EOF || isspace (c))
        !            69:        break;
        !            70:       str[str_size++] = c;
        !            71:       c = getc (stream);
        !            72:     }
        !            73:   ungetc (c, stream);
        !            74:
        !            75:   if (str_size >= alloc_size)
        !            76:     {
        !            77:       size_t old_alloc_size = alloc_size;
        !            78:       alloc_size = alloc_size * 3 / 2;
        !            79:       str = (char *) (*_mp_reallocate_func) (str, old_alloc_size, alloc_size);
        !            80:     }
        !            81:   str[str_size] = 0;
        !            82:
        !            83:   retval = mpf_set_str (rop, str, base);
        !            84:   if (retval == -1)
        !            85:     return 0;                  /* error */
        !            86:
        !            87:   (*_mp_free_func) (str, alloc_size);
        !            88:   return str_size + nread;
        !            89: }