68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*
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* Copyright (C) 2013-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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* Copyright (C) 2008-2013 Sourcefire, Inc.
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*
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* Authors: Török Edvin
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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,
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* MA 02110-1301, USA.
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*/
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#ifndef TEXTBUF_H
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#define TEXTBUF_H
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struct text_buffer {
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char *data;
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size_t pos;
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size_t capacity;
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};
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static inline int textbuffer_ensure_capacity(struct text_buffer *txtbuf, size_t len)
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{
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if (txtbuf->pos + len > txtbuf->capacity) {
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char *d;
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unsigned capacity = MAX(txtbuf->pos + len, txtbuf->capacity + 4096);
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d = cli_realloc(txtbuf->data, capacity);
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if (!d)
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return -1;
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txtbuf->capacity = capacity;
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txtbuf->data = d;
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}
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return 0;
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}
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static inline int textbuffer_append_len(struct text_buffer *txtbuf, const char *s, size_t len)
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{
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if (textbuffer_ensure_capacity(txtbuf, len) == -1)
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return -1;
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memcpy(&txtbuf->data[txtbuf->pos], s, len);
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txtbuf->pos += len;
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return 0;
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}
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static inline int textbuffer_append(struct text_buffer *txtbuf, const char *s)
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{
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size_t len = strlen(s);
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return textbuffer_append_len(txtbuf, s, len);
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}
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static inline int textbuffer_putc(struct text_buffer *txtbuf, const char c)
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{
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if (textbuffer_ensure_capacity(txtbuf, 1) == -1)
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return -1;
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txtbuf->data[txtbuf->pos++] = c;
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return 0;
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}
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#endif
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