mirror of
https://git.code.sf.net/p/zint/code
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39380d6767
those in "backend/common.h", which are prefixed by `z_` - makes symbol clashes more unlikely when zint is statically linked (ticket #337, props Ulrich Becker) DOTCODE: fix padding allowance (10 -> 52 - probable max 35) to cover cases with large no. of columns requested and little data, to prevent `codeword_array` buffer overflow AZTEC/CODEONE: some code fiddling general_field: prefix defines with `GF_`, shorten static funcs prefix `general_field_` -> `gf_`
88 lines
3.7 KiB
C
88 lines
3.7 KiB
C
/* large.h - Handles binary manipulation of large numbers */
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/*
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libzint - the open source barcode library
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Copyright (C) 2008-2025 Robin Stuart <rstuart114@gmail.com>
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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 conditions
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are met:
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1. 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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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the project nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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/* SPDX-License-Identifier: BSD-3-Clause */
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#ifndef Z_LARGE_H
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#define Z_LARGE_H
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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typedef struct { uint64_t lo; uint64_t hi; } large_uint;
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#define zint_large_lo(s) ((s)->lo)
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#define zint_large_hi(s) ((s)->hi)
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/* Set 128-bit `t` from 128-bit `s` */
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#define zint_large_load(t, s) do { *(t) = *(s); } while (0)
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/* Set 128-bit `t` from 64-bit `s` */
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#define zint_large_load_u64(t, s) do { (t)->lo = (s); (t)->hi = 0; } while (0)
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/* Convert decimal string `s` of (at most) length `length` to 64-bit and place in 128-bit `t` */
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INTERNAL void zint_large_load_str_u64(large_uint *t, const unsigned char *s, const int length);
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/* Add 128-bit `s` to 128-bit `t` */
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INTERNAL void zint_large_add(large_uint *t, const large_uint *s);
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/* Add 64-bit `s` to 128-bit `t` */
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INTERNAL void zint_large_add_u64(large_uint *t, const uint64_t s);
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/* Subtract 64-bit `s` from 128-bit `t` */
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INTERNAL void zint_large_sub_u64(large_uint *t, const uint64_t s);
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/* Multiply 128-bit `t` by 64-bit `s` */
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INTERNAL void zint_large_mul_u64(large_uint *t, const uint64_t s);
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/* Divide 128-bit dividend `t` by 64-bit divisor `v`, returning 64-bit remainder */
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INTERNAL uint64_t zint_large_div_u64(large_uint *t, uint64_t v);
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/* Unset a bit (zero-based) */
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INTERNAL void zint_large_unset_bit(large_uint *t, const int bit);
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/* Output large_uint into an unsigned int array of size `size`, each element containing `bits` bits */
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INTERNAL void zint_large_uint_array(const large_uint *t, unsigned int *uint_array, const int size, int bits);
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/* As `large_uint_array()` above, except output to unsigned char array */
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INTERNAL void zint_large_uchar_array(const large_uint *t, unsigned char *uchar_array, const int size, int bits);
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/* Format large_uint into buffer, which should be at least 35 chars in size */
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INTERNAL char *zint_large_dump(const large_uint *t, char *buf);
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/* Output formatted large_uint to stdout */
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INTERNAL void zint_large_print(const large_uint *t);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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/* vim: set ts=4 sw=4 et : */
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#endif /* Z_LARGE_H */
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