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buf: Rework xmlBuf code

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Always use what the old implementation called the "IO" allocation
scheme, allowing to move the content pointer past the initial
allocation. This is inexpensive and allows efficient shrinking.

Optimize xmlBufGrow, reusing shrunken memory as much as possible.

Simplify xmlBufAdd.

Make xmlBufBackToBuffer return an error on overflow.

Make "size" exclude the terminating NULL byte.

Always provide an initial size.

Reintroduce static buffers.

Remove xmlBufResize and several other functions.
This commit is contained in:
Nick Wellnhofer
2024-07-07 03:01:51 +02:00
parent 2adcde3920
commit a221cd7849
11 changed files with 277 additions and 576 deletions
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12
HTMLtree.c
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@@ -460,7 +460,8 @@ htmlBufNodeDumpFormat(xmlBufPtr buf, xmlDocPtr doc, xmlNodePtr cur,
int
htmlNodeDump(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur) {
xmlBufPtr buffer;
size_t ret;
size_t ret1;
int ret2;
if ((buf == NULL) || (cur == NULL))
return(-1);
@@ -470,14 +471,13 @@ htmlNodeDump(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur) {
if (buffer == NULL)
return(-1);
xmlBufSetAllocationScheme(buffer, XML_BUFFER_ALLOC_DOUBLEIT);
ret = htmlBufNodeDumpFormat(buffer, doc, cur, 1);
ret1 = htmlBufNodeDumpFormat(buffer, doc, cur, 1);
xmlBufBackToBuffer(buffer);
ret2 = xmlBufBackToBuffer(buffer, buf);
if (ret > INT_MAX)
if ((ret1 == (size_t) -1) || (ret2 < 0))
return(-1);
return((int) ret);
return(ret1 > INT_MAX ? INT_MAX : ret1);
}
/**