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parser: Merge xmlParserInputGrow into xmlGROW

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Simplifies the code and makes error handling easier.
This commit is contained in:
Nick Wellnhofer
2023-03-09 22:27:58 +01:00
parent 14604a446e
commit 56cc2211bc
1 changed files with 30 additions and 23 deletions
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53
parser.c
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@@ -2083,38 +2083,45 @@ static void xmlSHRINK (xmlParserCtxtPtr ctxt) {
xmlGROW (ctxt);
static void xmlGROW (xmlParserCtxtPtr ctxt) {
ptrdiff_t curEnd = ctxt->input->end - ctxt->input->cur;
ptrdiff_t curBase = ctxt->input->cur - ctxt->input->base;
xmlParserInputPtr in = ctxt->input;
xmlParserInputBufferPtr buf = in->buf;
ptrdiff_t curEnd = in->end - in->cur;
ptrdiff_t curBase = in->cur - in->base;
int ret;
if (buf == NULL)
return;
/* Don't grow memory buffers. */
if ((buf->encoder == NULL) && (buf->readcallback == NULL))
return;
if (((curEnd > XML_MAX_LOOKUP_LIMIT) ||
(curBase > XML_MAX_LOOKUP_LIMIT)) &&
((ctxt->input->buf) &&
(ctxt->input->buf->readcallback != NULL)) &&
((ctxt->options & XML_PARSE_HUGE) == 0)) {
xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR, "Huge input lookup");
xmlHaltParser(ctxt);
return;
}
/* TODO: xmlParserInputGrow should take a ctxt argument. */
if (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) < 0) {
/* Could be a memory or IO error. */
xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR, "growing buffer");
xmlHaltParser(ctxt);
return;
}
if ((ctxt->input->cur > ctxt->input->end) ||
(ctxt->input->cur < ctxt->input->base)) {
xmlHaltParser(ctxt);
xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR, "cur index out of bound");
return;
}
if ((ctxt->input->cur != NULL) && (*ctxt->input->cur == 0)) {
if (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) < 0) {
xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR, "growing buffer");
xmlHaltParser(ctxt);
return;
}
if (xmlBufUse(buf->buffer) > (unsigned int) curBase + INPUT_CHUNK)
return;
ret = xmlParserInputBufferGrow(buf, INPUT_CHUNK);
in->base = xmlBufContent(buf->buffer);
if (in->base == NULL) {
xmlErrMemory(ctxt, NULL);
in->base = BAD_CAST "";
in->cur = in->base;
in->end = in->base;
return;
}
in->cur = in->base + curBase;
in->end = xmlBufEnd(buf->buffer);
/* TODO: Get error code from xmlParserInputBufferGrow */
if (ret < 0)
xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR, "Growing input buffer");
}
#define SKIP_BLANKS xmlSkipBlankChars(ctxt)