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23ce05f906
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>
87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/* Copyright 1996-2018 The NASM Authors - All Rights Reserved */
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#include "nctype.h"
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#include <ctype.h>
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/*
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* Table of tolower() results. This avoids function calls
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* on some platforms.
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*/
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unsigned char nasm_tolower_tab[256];
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static void tolower_tab_init(void)
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{
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int i;
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for (i = 0; i < 256; i++)
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nasm_tolower_tab[i] = tolower(i);
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}
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/*
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* Table of character type flags; some are simply <ctype.h>,
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* some are NASM-specific.
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*/
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uint16_t nasm_ctype_tab[256];
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#if !defined(HAVE_ISCNTRL) && !defined(iscntrl)
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# define iscntrl(x) ((x) < 32)
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#endif
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#if !defined(HAVE_ISASCII) && !defined(isascii)
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# define isascii(x) ((x) < 128)
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#endif
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static void ctype_tab_init(void)
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{
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int i;
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for (i = 0; i < 256; i++) {
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enum nasm_ctype ct = 0;
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if (iscntrl(i))
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ct |= NCT_CTRL;
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if (isascii(i))
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ct |= NCT_ASCII;
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if (isspace(i) && i != '\n')
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ct |= NCT_SPACE;
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if (isalpha(i)) {
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ct |= (nasm_tolower(i) == i) ? NCT_LOWER : NCT_UPPER;
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ct |= NCT_ID|NCT_IDSTART;
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}
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if (isdigit(i))
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ct |= NCT_DIGIT|NCT_ID;
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if (isxdigit(i))
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ct |= NCT_HEX;
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/* Non-ASCII character, but no ctype returned (e.g. Unicode) */
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if (!ct && !ispunct(i))
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ct |= NCT_ID|NCT_IDSTART;
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nasm_ctype_tab[i] = ct;
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}
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nasm_ctype_tab['-'] |= NCT_MINUS;
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nasm_ctype_tab['$'] |= NCT_DOLLAR|NCT_ID;
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nasm_ctype_tab['_'] |= NCT_UNDER|NCT_ID|NCT_IDSTART;
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nasm_ctype_tab['.'] |= NCT_ID|NCT_IDSTART;
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nasm_ctype_tab['@'] |= NCT_ID|NCT_IDSTART;
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nasm_ctype_tab['?'] |= NCT_ID|NCT_IDSTART;
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nasm_ctype_tab['#'] |= NCT_ID;
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nasm_ctype_tab['~'] |= NCT_ID;
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nasm_ctype_tab['\''] |= NCT_QUOTE;
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nasm_ctype_tab['\"'] |= NCT_QUOTE;
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nasm_ctype_tab['`'] |= NCT_QUOTE;
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}
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void nasm_ctype_init(void)
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{
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tolower_tab_init();
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ctype_tab_init();
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}
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