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https://github.com/netwide-assembler/nasm.git
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34eefd3803
Add the %map() function which can apply arguments to a macro from a list. Allow the user to specify the desired radix for an evaluated parameter. It doesn't make any direct difference, but can be nice for debugging or turning into strings. As part of this, split expand_one_smacro() into two parts: parameter parsing and macro expansion. This is a very straightforward splitting of two mostly unrelated pieces of functionality. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 2023 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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#include "nasmlib.h"
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/*
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* Produce an unsigned integer string from a number with a specified
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* base, digits and signedness.
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*/
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int numstr(char *buf, size_t buflen, uint64_t n,
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int digits, unsigned int base, bool ucase)
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{
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static const char digit_chars[2][NUMSTR_MAXBASE+1] =
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{
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/* Lower case version */
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"0123456789"
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"abcdefghijklmnopqrstuvwxyz"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"@_",
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/* Upper case version */
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"0123456789"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz"
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"@_"
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};
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const char * const dchars = digit_chars[ucase];
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bool moredigits = digits <= 0;
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char *p;
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int len;
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if (base < 2 || base > NUMSTR_MAXBASE)
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return -1;
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if (moredigits)
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digits = -digits;
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p = buf + buflen;
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*--p = '\0';
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while (p > buf && (digits-- > 0 || (moredigits && n))) {
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*--p = dchars[n % base];
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n /= base;
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}
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len = buflen - (p - buf); /* Including final null */
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if (p != buf)
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memmove(buf, p, len);
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return len - 1;
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}
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