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io: Allocate output buffer with XML_BUFFER_ALLOC_IO

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This allows efficient shrinking of memory buffers.

Support IO buffers in xmlBufDetach.
This commit is contained in:
Nick Wellnhofer 2024-03-18 14:20:19 +01:00
parent 072facc49e
commit a279aae30f
2 changed files with 10 additions and 2 deletions
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8
buf.c
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@ -195,8 +195,16 @@ xmlBufDetach(xmlBufPtr buf) {
if (buf->error)
return(NULL);
if ((buf->alloc == XML_BUFFER_ALLOC_IO) &&
(buf->content != buf->contentIO)) {
ret = xmlStrndup(buf->content, buf->use);
xmlFree(buf->contentIO);
} else {
ret = buf->content;
}
buf->content = NULL;
buf->contentIO = NULL;
buf->size = 0;
buf->use = 0;
UPDATE_COMPAT(buf);

2
xmlIO.c
View File

@ -1394,7 +1394,7 @@ xmlAllocOutputBuffer(xmlCharEncodingHandlerPtr encoder) {
xmlFree(ret);
return(NULL);
}
xmlBufSetAllocationScheme(ret->buffer, XML_BUFFER_ALLOC_DOUBLEIT);
xmlBufSetAllocationScheme(ret->buffer, XML_BUFFER_ALLOC_IO);
ret->encoder = encoder;
if (encoder != NULL) {