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SPDX is an international standard for documenting software license requirements. Remove the existing headers and replace with a brief SPDX preamble. See: https://spdx.dev/use/specifications/ The script used to convert the files is added to "tools", and the file header templates in headers/ are updated. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/* Copyright 1996-2025 The NASM Authors - All Rights Reserved */
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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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