mirror of
https://github.com/netwide-assembler/nasm.git
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f6166e571a
Convenience preprocessor functions that allows for efficient packing of binary data in source code. Move some functions that has previously been local but are more generally useful into more accessible places. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
139 lines
4.0 KiB
C
139 lines
4.0 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 1996-2025 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* ctype-like functions specific to NASM
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*/
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#ifndef NASM_NCTYPE_H
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#define NASM_NCTYPE_H
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#include "compiler.h"
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void nasm_ctype_init(void);
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extern unsigned char nasm_tolower_tab[256];
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static inline char nasm_tolower(char x)
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{
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return nasm_tolower_tab[(unsigned char)x];
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}
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/*
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* NASM ctype table
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*/
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enum nasm_ctype {
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NCT_CTRL = 0x0001,
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NCT_SPACE = 0x0002,
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NCT_ASCII = 0x0004,
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NCT_LOWER = 0x0008, /* isalpha(x) && tolower(x) == x */
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NCT_UPPER = 0x0010, /* isalpha(x) && tolower(x) != x */
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NCT_DIGIT = 0x0020,
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NCT_HEX = 0x0040,
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NCT_ID = 0x0080,
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NCT_IDSTART = 0x0100,
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NCT_MINUS = 0x0200, /* - */
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NCT_DOLLAR = 0x0400, /* $ */
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NCT_UNDER = 0x0800, /* _ */
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NCT_QUOTE = 0x1000 /* " ' ` */
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};
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extern uint16_t nasm_ctype_tab[256];
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static inline bool nasm_ctype(unsigned char x, enum nasm_ctype mask)
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{
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return (nasm_ctype_tab[x] & mask) != 0;
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}
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static inline bool nasm_isspace(char x)
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{
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return nasm_ctype(x, NCT_SPACE);
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}
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static inline bool nasm_isalpha(char x)
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{
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return nasm_ctype(x, NCT_LOWER|NCT_UPPER);
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}
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static inline bool nasm_isdigit(char x)
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{
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return nasm_ctype(x, NCT_DIGIT);
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}
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static inline bool nasm_isalnum(char x)
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{
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return nasm_ctype(x, NCT_LOWER|NCT_UPPER|NCT_DIGIT);
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}
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static inline bool nasm_isxdigit(char x)
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{
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return nasm_ctype(x, NCT_HEX);
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}
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static inline bool nasm_isidstart(char x)
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{
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return nasm_ctype(x, NCT_IDSTART);
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}
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static inline bool nasm_isidchar(char x)
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{
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return nasm_ctype(x, NCT_ID);
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}
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static inline bool nasm_isbrcchar(char x)
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{
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return nasm_ctype(x, NCT_ID|NCT_MINUS);
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}
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static inline bool nasm_isnumstart(char x)
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{
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return nasm_ctype(x, NCT_DIGIT|NCT_DOLLAR);
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}
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static inline bool nasm_isnumchar(char x)
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{
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return nasm_ctype(x, NCT_DIGIT|NCT_LOWER|NCT_UPPER|NCT_UNDER);
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}
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static inline bool nasm_isquote(char x)
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{
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return nasm_ctype(x, NCT_QUOTE);
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}
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static inline void nasm_ctype_tasm_mode(void)
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{
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/* No differences at the present moment */
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}
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/* Returns a value >= 16 if not a valid hex digit */
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static inline unsigned int nasm_hexval(char c)
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{
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unsigned int v = (unsigned char) c;
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if (v >= '0' && v <= '9')
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return v - '0';
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else
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return (v|0x20) - 'a' + 10;
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}
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#endif /* NASM_NCTYPE_H */
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