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7d5e549d63
We should always support up to 8 characters, i.e. 64 bits, in a string-to-numeric conversion. Reported-by: Aleksandras Krupica <vaikutisasa@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 1996-2016 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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* rdstrnum.c
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*
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* This converts a NASM string to an integer, used when a string
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* is used in an integer constant context. This is a binary conversion,
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* not a conversion from a numeric constant in text form.
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*/
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#include "compiler.h"
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#include "nasmlib.h"
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#include "nasm.h"
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int64_t readstrnum(char *str, int length, bool *warn)
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{
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int64_t charconst = 0;
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int i;
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*warn = false;
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if (length > 8) {
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*warn = true;
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length = 8;
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}
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for (i = 0; i < length; i++)
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charconst += (uint64_t)((uint8_t)(*str++)) << (i*8);
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return charconst;
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}
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