gnu/usr.bin/groff/libgroff/lib.h

   1 /*-
   2  * This code is derived from software copyrighted by the Free Software
   3  * Foundation.
   4  *
   5  * Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
   6  *
   7  *      @(#)lib.h       6.4 (Berkeley) 5/8/91
   8  */
   9
  10 /* Copyright (C) 1989, 1990 Free Software Foundation, Inc.
  11      Written by James Clark (jjc@jclark.uucp)
  12
  13 This file is part of groff.
  14
  15 groff is free software; you can redistribute it and/or modify it under
  16 the terms of the GNU General Public License as published by the Free
  17 Software Foundation; either version 1, or (at your option) any later
  18 version.
  19
  20 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  21 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  22 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  23 for more details.
  24
  25 You should have received a copy of the GNU General Public License along
  26 with groff; see the file LICENSE.  If not, write to the Free Software
  27 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  28
  29 /* This file is included in both C and C++ compilations. */
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33   // const char *strerror(int);
  34   // const char *itoa(int);
  35   // const char *iftoa(int, int);
  36 };
  37
  38 const char *itoa(int);
  39 const char *iftoa(int, int);
  40
  41 char *strsave(const char *s);
  42
  43 int interpret_lf_args(const char *p);
  44
  45 inline int illegal_input_char(int c)
  46 {
  47   return c == 000 || (c > 012 && c < 040) || (c >= 0200 && c < 0240);
  48 }
  49
  50 #endif
  51
  52 #ifndef INT_MAX
  53 #define INT_MAX 2147483647
  54 #endif
  55
  56 /* It's not safe to rely on people getting INT_MIN right (ie signed). */
  57
  58 #ifdef INT_MIN
  59 #undef INT_MIN
  60 #endif
  61
  62 #ifdef CFRONT_ANSI_BUG
  63
  64 /* This works around a bug in cfront 2.0 used with ANSI C compilers. */
  65
  66 #define INT_MIN ((long)(-INT_MAX-1))
  67
  68 #else /* CFRONT_ANSI_BUG */
  69
  70 #define INT_MIN (-INT_MAX-1)
  71
  72 #endif /* CFRONT_ANSI_BUG */
  73
  74 /* Maximum number of digits in the decimal representation of an int
  75 (not including the -). */
  76
  77 #define INT_DIGITS 10
  78
  79 /* From the old GNU math.h; does some standard actually require these? */
  80 #define M_E         2.7182818284590452354
  81 #define M_LOG2E     1.4426950408889634074
  82 #define M_LOG10E    0.43429448190325182765
  83 #define M_LN2       0.69314718055994530942
  84 #define M_LN10      2.30258509299404568402
  85 #define M_PI        3.14159265358979323846
  86 #define M_PI_2      1.57079632679489661923
  87 #define M_1_PI      0.31830988618379067154
  88 #define M_PI_4      0.78539816339744830962
  89 #define M_2_PI      0.63661977236758134308
  90 #define M_2_SQRTPI  1.12837916709551257390
  91 #define M_SQRT2     1.41421356237309504880
  92 #define M_SQRT1_2   0.70710678118654752440
  93 #define PI  M_PI
  94 #define PI2  M_PI_2