include/safe-ctype.h

   1 /* <ctype.h> replacement macros.
   2
   3    Copyright (C) 2000, 2001 Free Software Foundation, Inc.
   4    Contributed by Zack Weinberg <zackw@stanford.edu>.
   5
   6 This file is part of the libiberty library.
   7 Libiberty is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU Library General Public
   9 License as published by the Free Software Foundation; either
  10 version 2 of the License, or (at your option) any later version.
  11
  12 Libiberty is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 Library General Public License for more details.
  16
  17 You should have received a copy of the GNU Library General Public
  18 License along with libiberty; see the file COPYING.LIB.  If
  19 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* This is a compatible replacement of the standard C library's <ctype.h>
  23    with the following properties:
  24
  25    - Implements all isxxx() macros required by C99.
  26    - Also implements some character classes useful when
  27      parsing C-like languages.
  28    - Does not change behavior depending on the current locale.
  29    - Behaves properly for all values in the range of a signed or
  30      unsigned char.
  31
  32    To avoid conflicts, this header defines the isxxx functions in upper
  33    case, e.g. ISALPHA not isalpha.  */
  34
  35 #ifndef SAFE_CTYPE_H
  36 #define SAFE_CTYPE_H
  37
  38 #ifdef isalpha
  39  #error "safe-ctype.h and ctype.h may not be used simultaneously"
  40 #else
  41
  42 /* Categories.  */
  43
  44 enum {
  45   /* In C99 */
  46   _sch_isblank  = 0x0001,       /* space \t */
  47   _sch_iscntrl  = 0x0002,       /* nonprinting characters */
  48   _sch_isdigit  = 0x0004,       /* 0-9 */
  49   _sch_islower  = 0x0008,       /* a-z */
  50   _sch_isprint  = 0x0010,       /* any printing character including ' ' */
  51   _sch_ispunct  = 0x0020,       /* all punctuation */
  52   _sch_isspace  = 0x0040,       /* space \t \n \r \f \v */
  53   _sch_isupper  = 0x0080,       /* A-Z */
  54   _sch_isxdigit = 0x0100,       /* 0-9A-Fa-f */
  55
  56   /* Extra categories useful to cpplib.  */
  57   _sch_isidst   = 0x0200,       /* A-Za-z_ */
  58   _sch_isvsp    = 0x0400,       /* \n \r */
  59   _sch_isnvsp   = 0x0800,       /* space \t \f \v \0 */
  60
  61   /* Combinations of the above.  */
  62   _sch_isalpha  = _sch_isupper|_sch_islower,    /* A-Za-z */
  63   _sch_isalnum  = _sch_isalpha|_sch_isdigit,    /* A-Za-z0-9 */
  64   _sch_isidnum  = _sch_isidst|_sch_isdigit,     /* A-Za-z0-9_ */
  65   _sch_isgraph  = _sch_isalnum|_sch_ispunct,    /* isprint and not space */
  66   _sch_iscppsp  = _sch_isvsp|_sch_isnvsp        /* isspace + \0 */
  67 };
  68
  69 /* Character classification.  */
  70 extern const unsigned short _sch_istable[256];
  71
  72 #define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit))
  73
  74 #define ISALPHA(c)  _sch_test(c, _sch_isalpha)
  75 #define ISALNUM(c)  _sch_test(c, _sch_isalnum)
  76 #define ISBLANK(c)  _sch_test(c, _sch_isblank)
  77 #define ISCNTRL(c)  _sch_test(c, _sch_iscntrl)
  78 #define ISDIGIT(c)  _sch_test(c, _sch_isdigit)
  79 #define ISGRAPH(c)  _sch_test(c, _sch_isgraph)
  80 #define ISLOWER(c)  _sch_test(c, _sch_islower)
  81 #define ISPRINT(c)  _sch_test(c, _sch_isprint)
  82 #define ISPUNCT(c)  _sch_test(c, _sch_ispunct)
  83 #define ISSPACE(c)  _sch_test(c, _sch_isspace)
  84 #define ISUPPER(c)  _sch_test(c, _sch_isupper)
  85 #define ISXDIGIT(c) _sch_test(c, _sch_isxdigit)
  86
  87 #define ISIDNUM(c)      _sch_test(c, _sch_isidnum)
  88 #define ISIDST(c)       _sch_test(c, _sch_isidst)
  89 #define IS_VSPACE(c)    _sch_test(c, _sch_isvsp)
  90 #define IS_NVSPACE(c)   _sch_test(c, _sch_isnvsp)
  91 #define IS_SPACE_OR_NUL(c)      _sch_test(c, _sch_iscppsp)
  92
  93 /* Character transformation.  */
  94 extern const unsigned char  _sch_toupper[256];
  95 extern const unsigned char  _sch_tolower[256];
  96 #define TOUPPER(c) _sch_toupper[(c) & 0xff]
  97 #define TOLOWER(c) _sch_tolower[(c) & 0xff]
  98
  99 #endif /* no ctype.h */
 100 #endif /* SAFE_CTYPE_H */