62 lines
3.0 KiB
C
62 lines
3.0 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/alg/arraylist2.internal.h"
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#include "libc/fmt/fmt.h"
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#include "libc/mem/mem.h"
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#include "libc/str/str.h"
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#include "tool/decode/lib/flagger.h"
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/**
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* Formats numeric flags integer as symbolic code.
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*
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* @param names maps individual flags to string names in no order
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* @param id is the flags
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* @return NUL-terminated string that needs free()
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*/
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nodiscard char *RecreateFlags(const struct IdName *names, unsigned long id) {
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bool first;
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size_t bufi, bufn;
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char *bufp, extrabuf[20];
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bufi = 0;
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bufn = 0;
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bufp = NULL;
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first = true;
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for (; names->name; names++) {
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if ((id == 0 && names->id == 0) ||
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(id != 0 && names->id != 0 && (id & names->id) == names->id)) {
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id &= ~names->id;
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if (!first) {
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APPEND(&bufp, &bufi, &bufn, "|");
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} else {
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first = false;
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}
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CONCAT(&bufp, &bufi, &bufn, names->name, strlen(names->name));
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}
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}
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if (id) {
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if (bufi) APPEND(&bufp, &bufi, &bufn, "|");
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CONCAT(&bufp, &bufi, &bufn, extrabuf,
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snprintf(extrabuf, sizeof(extrabuf), "%#x", id));
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} else if (!bufi) {
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APPEND(&bufp, &bufi, &bufn, "0");
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}
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return bufp;
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}
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