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c7179009cf
We need to be calling snprintfrr() instead of snprintf() in places that wrap snprintf in some user-exposed way; otherwise the extensions won't be available for those functions. Signed-off-by: David Lamparter <equinox@diac24.net>
108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/*
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* Simple string buffer
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*
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* Copyright (C) 2017 Christian Franke
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*
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* This file is part of FRR.
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*
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* FRR is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* FRR 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 FRR; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include <zebra.h>
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#include "printfrr.h"
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#include "sbuf.h"
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#include "memory.h"
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void sbuf_init(struct sbuf *dest, char *buf, size_t size)
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{
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dest->fixed = (size > 0);
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if (dest->fixed) {
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dest->buf = buf;
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dest->size = size;
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} else {
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dest->buf = XMALLOC(MTYPE_TMP, 4096);
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dest->size = 4096;
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}
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dest->pos = 0;
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dest->buf[0] = '\0';
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}
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void sbuf_reset(struct sbuf *dest)
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{
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dest->pos = 0;
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dest->buf[0] = '\0';
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}
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const char *sbuf_buf(struct sbuf *buf)
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{
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return buf->buf;
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}
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void sbuf_free(struct sbuf *buf)
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{
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if (!buf->fixed)
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XFREE(MTYPE_TMP, buf->buf);
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}
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void sbuf_push(struct sbuf *buf, int indent, const char *format, ...)
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{
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va_list args;
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int written;
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if (!buf->fixed) {
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int written1, written2;
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size_t new_size;
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written1 = indent;
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va_start(args, format);
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written2 = vsnprintfrr(NULL, 0, format, args);
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va_end(args);
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new_size = buf->size;
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if (written1 >= 0 && written2 >= 0) {
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while (buf->pos + written1 + written2 >= new_size)
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new_size *= 2;
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if (new_size > buf->size) {
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buf->buf =
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XREALLOC(MTYPE_TMP, buf->buf, new_size);
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buf->size = new_size;
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}
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}
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}
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written = snprintf(buf->buf + buf->pos, buf->size - buf->pos, "%*s",
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indent, "");
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if (written >= 0)
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buf->pos += written;
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if (buf->pos > buf->size)
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buf->pos = buf->size;
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va_start(args, format);
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written = vsnprintfrr(buf->buf + buf->pos, buf->size - buf->pos,
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format, args);
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va_end(args);
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if (written >= 0)
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buf->pos += written;
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if (buf->pos > buf->size)
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buf->pos = buf->size;
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if (buf->pos == buf->size)
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assert(!"Buffer filled up!");
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}
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