1 /* ----------------------------------------------------------------------------
2 libconfig - A library for processing structured configuration files
3 Copyright (C) 2005-2020 Mark A Lindner
4
5 This file is part of libconfig.
6
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public License
9 as published by the Free Software Foundation; either version 2.1 of
10 the License, or (at your option) any later version.
11
12 This library is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Library General Public
18 License along with this library; if not, see
19 <http://www.gnu.org/licenses/>.
20 ----------------------------------------------------------------------------
21 */
22
23 #include "strbuf.h"
24 #include "util.h"
25
26 #include <string.h>
27 #include <stdlib.h>
28
29 #define STRING_BLOCK_SIZE 64
30
31 /* ------------------------------------------------------------------------- */
32
libconfig_strbuf_ensure_capacity(strbuf_t * buf,size_t len)33 void libconfig_strbuf_ensure_capacity(strbuf_t *buf, size_t len)
34 {
35 static const size_t mask = ~(STRING_BLOCK_SIZE - 1);
36
37 size_t newlen = buf->length + len + 1; /* add 1 for NUL */
38 if(newlen > buf->capacity)
39 {
40 buf->capacity = (newlen + (STRING_BLOCK_SIZE - 1)) & mask;
41 buf->string = (char *)realloc(buf->string, buf->capacity);
42 }
43 }
44
45 /* ------------------------------------------------------------------------- */
46
libconfig_strbuf_release(strbuf_t * buf)47 char *libconfig_strbuf_release(strbuf_t *buf)
48 {
49 char *r = buf->string;
50 __zero(buf);
51 return(r);
52 }
53
54 /* ------------------------------------------------------------------------- */
55
libconfig_strbuf_append_string(strbuf_t * buf,const char * s)56 void libconfig_strbuf_append_string(strbuf_t *buf, const char *s)
57 {
58 size_t len = strlen(s);
59 libconfig_strbuf_ensure_capacity(buf, len);
60 strcpy(buf->string + buf->length, s);
61 buf->length += len;
62 }
63
64 /* ------------------------------------------------------------------------- */
65
libconfig_strbuf_append_char(strbuf_t * buf,char c)66 void libconfig_strbuf_append_char(strbuf_t *buf, char c)
67 {
68 libconfig_strbuf_ensure_capacity(buf, 1);
69 *(buf->string + buf->length) = c;
70 ++(buf->length);
71 *(buf->string + buf->length) = '\0';
72 }
73
74 /* ------------------------------------------------------------------------- */
75