root/src/noit_xml.c

Revision c30a0fee9505231eb5c6c83767095223ce9a1939, 2.9 kB (checked in by Theo Schlossnagle <jesus@omniti.com>, 6 years ago)

this is cheaper

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1 /*
2  * Copyright (c) 2007, OmniTI Computer Consulting, Inc.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are
7  * met:
8  *
9  *     * Redistributions of source code must retain the above copyright
10  *       notice, this list of conditions and the following disclaimer.
11  *     * Redistributions in binary form must reproduce the above
12  *       copyright notice, this list of conditions and the following
13  *       disclaimer in the documentation and/or other materials provided
14  *       with the distribution.
15  *     * Neither the name OmniTI Computer Consulting, Inc. nor the names
16  *       of its contributors may be used to endorse or promote products
17  *       derived from this software without specific prior written
18  *       permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32
33 #include "noit_xml.h"
34 #include <assert.h>
35
36 struct noit_xml_buffer_ptr {
37   char *buff;
38   int raw_len;
39   int len;
40   int allocd;
41 };
42 static int
43 noit_xml_save_writer(void *vstr, const char *buffer, int len) {
44   struct noit_xml_buffer_ptr *clv = vstr;
45   if(!clv->buff) {
46     clv->allocd = 8192;
47     clv->buff = malloc(clv->allocd);
48   }
49   while(len + clv->len > clv->allocd) {
50     char *newbuff;
51     int newsize = clv->allocd;
52     newsize <<= 1;
53     newbuff = realloc(clv->buff, newsize);
54     if(!newbuff) {
55       return -1;
56     }
57     clv->allocd = newsize;
58     clv->buff = newbuff;
59   }
60   memcpy(clv->buff + clv->len, buffer, len);
61   clv->len += len;
62   return len;
63 }
64 static int
65 noit_xml_save_closer(void *vstr) {
66   struct noit_xml_buffer_ptr *clv = vstr;
67   if(clv->buff == NULL) return 0;
68   clv->buff[clv->len] = '\0';
69   return 0;
70 }
71
72 char *
73 noit_xmlSaveToBuffer(xmlDocPtr doc) {
74   xmlOutputBufferPtr out;
75   xmlCharEncodingHandlerPtr enc;
76   struct noit_xml_buffer_ptr buf = { NULL,0,0,0 };
77
78   enc = xmlGetCharEncodingHandler(XML_CHAR_ENCODING_UTF8);
79   out = xmlOutputBufferCreateIO(noit_xml_save_writer,
80                                 noit_xml_save_closer,
81                                 &buf, enc);
82   assert(out);
83   xmlSaveFormatFileTo(out, doc, "utf8", 1);
84   return buf.buff;
85 }
86
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