include/nctype.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 1996-2018 The NASM Authors - All Rights Reserved
   4  *   See the file AUTHORS included with the NASM distribution for
   5  *   the specific copyright holders.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following
   9  *   conditions are met:
  10  *
  11  *   * Redistributions of source code must retain the above copyright
  12  *     notice, this list of conditions and the following disclaimer.
  13  *   * Redistributions in binary form must reproduce the above
  14  *     copyright notice, this list of conditions and the following
  15  *     disclaimer in the documentation and/or other materials provided
  16  *     with the distribution.
  17  *
  18  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  19  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  20  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  21  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  29  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  30  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * ----------------------------------------------------------------------- */
  33
  34 /*
  35  * ctype-like functions specific to NASM
  36  */
  37 #ifndef NASM_NCTYPE_H
  38 #define NASM_NCTYPE_H
  39
  40 #include "compiler.h"
  41
  42 void nasm_ctype_init(void);
  43
  44 extern unsigned char nasm_tolower_tab[256];
  45 static inline char nasm_tolower(char x)
  46 {
  47     return nasm_tolower_tab[(unsigned char)x];
  48 }
  49
  50 /*
  51  * NASM ctype table
  52  */
  53 enum nasm_ctype {
  54     NCT_CTRL       = 0x0001,
  55     NCT_SPACE      = 0x0002,
  56     NCT_ASCII      = 0x0004,
  57     NCT_LOWER      = 0x0008,    /* isalpha(x) && tolower(x) == x */
  58     NCT_UPPER      = 0x0010,    /* isalpha(x) && tolower(x) != x */
  59     NCT_DIGIT      = 0x0020,
  60     NCT_HEX        = 0x0040,
  61     NCT_ID         = 0x0080,
  62     NCT_IDSTART    = 0x0100,
  63     NCT_MINUS      = 0x0200,    /* - */
  64     NCT_DOLLAR     = 0x0400,    /* $ */
  65     NCT_UNDER      = 0x0800,    /* _ */
  66     NCT_QUOTE      = 0x1000     /* " ' ` */
  67 };
  68
  69 extern uint16_t nasm_ctype_tab[256];
  70 static inline bool nasm_ctype(unsigned char x, enum nasm_ctype mask)
  71 {
  72     return (nasm_ctype_tab[x] & mask) != 0;
  73 }
  74
  75 static inline bool nasm_isspace(char x)
  76 {
  77     return nasm_ctype(x, NCT_SPACE);
  78 }
  79
  80 static inline bool nasm_isalpha(char x)
  81 {
  82     return nasm_ctype(x, NCT_LOWER|NCT_UPPER);
  83 }
  84
  85 static inline bool nasm_isdigit(char x)
  86 {
  87     return nasm_ctype(x, NCT_DIGIT);
  88 }
  89 static inline bool nasm_isalnum(char x)
  90 {
  91     return nasm_ctype(x, NCT_LOWER|NCT_UPPER|NCT_DIGIT);
  92 }
  93 static inline bool nasm_isxdigit(char x)
  94 {
  95     return nasm_ctype(x, NCT_HEX);
  96 }
  97 static inline bool nasm_isidstart(char x)
  98 {
  99     return nasm_ctype(x, NCT_IDSTART);
 100 }
 101 static inline bool nasm_isidchar(char x)
 102 {
 103     return nasm_ctype(x, NCT_ID);
 104 }
 105 static inline bool nasm_isbrcchar(char x)
 106 {
 107     return nasm_ctype(x, NCT_ID|NCT_MINUS);
 108 }
 109 static inline bool nasm_isnumstart(char x)
 110 {
 111     return nasm_ctype(x, NCT_DIGIT|NCT_DOLLAR);
 112 }
 113 static inline bool nasm_isnumchar(char x)
 114 {
 115     return nasm_ctype(x, NCT_DIGIT|NCT_LOWER|NCT_UPPER|NCT_UNDER);
 116 }
 117 static inline bool nasm_isquote(char x)
 118 {
 119     return nasm_ctype(x, NCT_QUOTE);
 120 }
 121
 122 static inline void nasm_ctype_tasm_mode(void)
 123 {
 124     /* No differences at the present moment */
 125 }
 126
 127 #endif /* NASM_NCTYPE_H */