syncfiles/lib/strbuf.c

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2022-07-16 21:04:27 +00:00
// Copyright 2022 Dietrich Epp.
// This file is part of SyncFiles. SyncFiles is licensed under the terms of the
// Mozilla Public License, version 2.0. See LICENSE.txt for details.
#include "lib/strbuf.h"
#include <stdlib.h>
#include <string.h>
bool StrbufAlloc(struct Strbuf *restrict b, size_t n)
{
size_t req = n + 1;
if (req > b->alloc) {
size_t nalloc = (b->alloc + 16) * 3 / 2;
if (req > nalloc) {
nalloc = req;
}
char *nbuf = realloc(b->buf, nalloc);
if (nbuf == NULL) {
return false;
}
b->buf = nbuf;
b->alloc = nalloc;
}
return true;
}
bool StrbufReserve(struct Strbuf *restrict b, size_t n)
{
return StrbufAlloc(b, b->len + n);
}
bool StrbufAppendMem(struct Strbuf *restrict b, const char *s, size_t n)
{
if (!StrbufReserve(b, n)) {
return false;
}
memcpy(b->buf + b->len, s, n);
b->buf[b->len + n] = '\0';
b->len += n;
return true;
}