Return to strtod.c CVS log

Up to [Apple XNU] / GNUtools / libg++ / libiberty

Annotation of GNUtools/libg++/libiberty/strtod.c, revision 1.1

1.1     ! root        1: /* Implementation of strtod for systems with atof.
        !             2:    Copyright (C) 1991 Free Software Foundation, Inc.
        !             3: 
        !             4: This file is part of the libiberty library.
        !             5: Libiberty is free software; you can redistribute it and/or
        !             6: modify it under the terms of the GNU Library General Public
        !             7: License as published by the Free Software Foundation; either
        !             8: version 2 of the License, or (at your option) any later version.
        !             9: 
        !            10: Libiberty is distributed in the hope that it will be useful,
        !            11: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            13: Library General Public License for more details.
        !            14: 
        !            15: You should have received a copy of the GNU Library General Public
        !            16: License along with libiberty; see the file COPYING.LIB.  If
        !            17: not, write to the Free Software Foundation, Inc., 675 Mass Ave,
        !            18: Cambridge, MA 02139, USA.  */
        !            19: 
        !            20: #include <ctype.h>
        !            21: 
        !            22: /* Disclaimer: this is currently just used by CHILL in GDB and therefore
        !            23:    has not been tested well.  It may have been tested for nothing except
        !            24:    that it compiles.  */
        !            25: 
        !            26: double
        !            27: strtod (str, ptr)
        !            28:      char *str;
        !            29:      char **ptr;
        !            30: {
        !            31:   char *p;
        !            32: 
        !            33:   if (ptr == (char **)0)
        !            34:     return atof (str);
        !            35:   
        !            36:   p = str;
        !            37:   
        !            38:   while (isspace (*p))
        !            39:     ++p;
        !            40:   
        !            41:   if (*p == '+' || *p == '-')
        !            42:     ++p;
        !            43: 
        !            44:   /* INF or INFINITY.  */
        !            45:   if ((p[0] == 'i' || p[0] == 'I')
        !            46:       && (p[1] == 'n' || p[1] == 'N')
        !            47:       && (p[2] == 'f' || p[2] == 'F'))
        !            48:     {
        !            49:       if ((p[3] == 'i' || p[3] == 'I')
        !            50:          && (p[4] == 'n' || p[4] == 'N')
        !            51:          && (p[5] == 'i' || p[5] == 'I')
        !            52:          && (p[6] == 't' || p[6] == 'T')
        !            53:          && (p[7] == 'y' || p[7] == 'Y'))
        !            54:        {
        !            55:          *ptr = p + 7;
        !            56:          return atof (str);
        !            57:        }
        !            58:       else
        !            59:        {
        !            60:          *ptr = p + 3;
        !            61:          return atof (str);
        !            62:        }
        !            63:     }
        !            64: 
        !            65:   /* NAN or NAN(foo).  */
        !            66:   if ((p[0] == 'n' || p[0] == 'N')
        !            67:       && (p[1] == 'a' || p[1] == 'A')
        !            68:       && (p[2] == 'n' || p[2] == 'N'))
        !            69:     {
        !            70:       p += 3;
        !            71:       if (*p == '(')
        !            72:        {
        !            73:          ++p;
        !            74:          while (*p != '\0' && *p != ')')
        !            75:            ++p;
        !            76:          if (*p == ')')
        !            77:            ++p;
        !            78:        }
        !            79:       *ptr = p;
        !            80:       return atof (str);
        !            81:     }
        !            82: 
        !            83:   /* digits, with 0 or 1 periods in it.  */
        !            84:   if (isdigit (*p) || *p == '.')
        !            85:     {
        !            86:       int got_dot = 0;
        !            87:       while (isdigit (*p) || (!got_dot && *p == '.'))
        !            88:        {
        !            89:          if (*p == '.')
        !            90:            got_dot = 1;
        !            91:          ++p;
        !            92:        }
        !            93: 
        !            94:       /* Exponent.  */
        !            95:       if (*p == 'e' || *p == 'E')
        !            96:        {
        !            97:          int i;
        !            98:          i = 1;
        !            99:          if (p[i] == '+' || p[i] == '-')
        !           100:            ++i;
        !           101:          if (isdigit (p[i]))
        !           102:            {
        !           103:              while (isdigit (p[i]))
        !           104:                ++i;
        !           105:              *ptr = p + i;
        !           106:              return atof (str);
        !           107:            }
        !           108:        }
        !           109:       *ptr = p;
        !           110:       return atof (str);
        !           111:     }
        !           112:   /* Didn't find any digits.  Doesn't look like a number.  */
        !           113:   *ptr = str;
        !           114:   return 0.0;
        !           115: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.