57 lines
2.8 KiB
C
57 lines
2.8 KiB
C
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/*-*- 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/log/check.h"
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#include "libc/macros.h"
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#include "libc/mem/mem.h"
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#include "libc/str/str.h"
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#include "libc/x/x.h"
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#include "tool/viz/lib/stringbuilder.h"
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static noinline void StringBuilderGrow(size_t need, struct StringBuilder *sb) {
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size_t n2;
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n2 = MAX(16, sb->n);
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while (sb->i + need > n2) n2 += n2 >> 1;
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sb->p = xrealloc(sb->p, n2);
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sb->n = n2;
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}
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struct StringBuilder *NewStringBuilder(void) {
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return xcalloc(1, sizeof(struct StringBuilder));
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}
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int StringBuilderAppend(const char *s, struct StringBuilder *sb) {
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size_t size;
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CHECK_LE(sb->i, sb->n);
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size = strlen(s);
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if (sb->i + size + 1 > sb->n) StringBuilderGrow(size + 1, sb);
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memcpy(sb->p + sb->i, s, size + 1);
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sb->i += size;
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return 0;
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}
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char *FreeStringBuilder(struct StringBuilder *sb) {
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char *res;
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CHECK_LE(sb->i, sb->n);
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CHECK_EQ('\0', sb->p[sb->i]);
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res = xrealloc(sb->p, sb->i + 1);
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free(sb);
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return res;
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}
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