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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
commit | 2c7cac91ed6e7db0f6937923d2b57f97dbdbc337 (patch) | |
tree | c05dc0f8e6aa3accc84e3e5cffc933ed94941383 /lib/sbuf.c | |
parent | Initial commit. (diff) | |
download | frr-upstream/8.4.4.tar.xz frr-upstream/8.4.4.zip |
Adding upstream version 8.4.4.upstream/8.4.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/sbuf.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/lib/sbuf.c b/lib/sbuf.c new file mode 100644 index 0000000..c04af15 --- /dev/null +++ b/lib/sbuf.c @@ -0,0 +1,107 @@ +/* + * Simple string buffer + * + * Copyright (C) 2017 Christian Franke + * + * This file is part of FRR. + * + * FRR is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * FRR is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with FRR; see the file COPYING. If not, write to the Free + * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ +#include <zebra.h> + +#include "printfrr.h" +#include "sbuf.h" +#include "memory.h" + +void sbuf_init(struct sbuf *dest, char *buf, size_t size) +{ + dest->fixed = (size > 0); + if (dest->fixed) { + dest->buf = buf; + dest->size = size; + } else { + dest->buf = XMALLOC(MTYPE_TMP, 4096); + dest->size = 4096; + } + + dest->pos = 0; + dest->buf[0] = '\0'; +} + +void sbuf_reset(struct sbuf *dest) +{ + dest->pos = 0; + dest->buf[0] = '\0'; +} + +const char *sbuf_buf(struct sbuf *buf) +{ + return buf->buf; +} + +void sbuf_free(struct sbuf *buf) +{ + if (!buf->fixed) + XFREE(MTYPE_TMP, buf->buf); +} + +void sbuf_push(struct sbuf *buf, int indent, const char *format, ...) +{ + va_list args; + int written; + + if (!buf->fixed) { + int written1, written2; + size_t new_size; + + written1 = indent; + va_start(args, format); + written2 = vsnprintfrr(NULL, 0, format, args); + va_end(args); + + new_size = buf->size; + if (written1 >= 0 && written2 >= 0) { + while (buf->pos + written1 + written2 >= new_size) + new_size *= 2; + if (new_size > buf->size) { + buf->buf = + XREALLOC(MTYPE_TMP, buf->buf, new_size); + buf->size = new_size; + } + } + } + + written = snprintf(buf->buf + buf->pos, buf->size - buf->pos, "%*s", + indent, ""); + + if (written >= 0) + buf->pos += written; + if (buf->pos > buf->size) + buf->pos = buf->size; + + va_start(args, format); + written = vsnprintfrr(buf->buf + buf->pos, buf->size - buf->pos, + format, args); + va_end(args); + + if (written >= 0) + buf->pos += written; + if (buf->pos > buf->size) + buf->pos = buf->size; + + if (buf->pos == buf->size) + assert(!"Buffer filled up!"); +} |