#include <libxml/tree.h>
#include <libxml/globals.h>
#include <libxml/tree.h>
+#include <libxml/parserInternals.h> /* for XML_MAX_TEXT_LENGTH */
#include "buf.h"
#define WITH_BUFFER_COMPAT
size_t use; /* The buffer size used */
size_t size; /* The buffer size */
xmlBufferPtr buffer; /* wrapper for an old buffer */
- int error; /* an error code if a failure occured */
+ int error; /* an error code if a failure occurred */
};
#ifdef WITH_BUFFER_COMPAT
xmlBufCreateStatic(void *mem, size_t size) {
xmlBufPtr ret;
- if ((mem == NULL) || (size == 0))
+ if (mem == NULL)
return(NULL);
ret = (xmlBufPtr) xmlMalloc(sizeof(xmlBuf));
if ((scheme == XML_BUFFER_ALLOC_DOUBLEIT) ||
(scheme == XML_BUFFER_ALLOC_EXACT) ||
(scheme == XML_BUFFER_ALLOC_HYBRID) ||
- (scheme == XML_BUFFER_ALLOC_IMMUTABLE)) {
+ (scheme == XML_BUFFER_ALLOC_IMMUTABLE) ||
+ (scheme == XML_BUFFER_ALLOC_BOUNDED)) {
buf->alloc = scheme;
if (buf->buffer)
buf->buffer->alloc = scheme;
size = buf->use + len + 100;
#endif
+ if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) {
+ /*
+ * Used to provide parsing limits
+ */
+ if ((buf->use + len >= XML_MAX_TEXT_LENGTH) ||
+ (buf->size >= XML_MAX_TEXT_LENGTH)) {
+ xmlBufMemoryError(buf, "buffer error: text too long\n");
+ return(0);
+ }
+ if (size >= XML_MAX_TEXT_LENGTH)
+ size = XML_MAX_TEXT_LENGTH;
+ }
if ((buf->alloc == XML_BUFFER_ALLOC_IO) && (buf->contentIO != NULL)) {
size_t start_buf = buf->content - buf->contentIO;
* used in the buffer. It does not account for the terminating zero
* usually needed
*
- * Returns the amount or 0 if none or an error occured
+ * Returns the amount or 0 if none or an error occurred
*/
size_t
CHECK_COMPAT(buf)
if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) return(0);
+ if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) {
+ /*
+ * Used to provide parsing limits
+ */
+ if (size >= XML_MAX_TEXT_LENGTH) {
+ xmlBufMemoryError(buf, "buffer error: text too long\n");
+ return(0);
+ }
+ }
/* Don't resize if we don't have to */
if (size < buf->size)
needSize = buf->use + len + 2;
if (needSize > buf->size){
+ if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) {
+ /*
+ * Used to provide parsing limits
+ */
+ if (needSize >= XML_MAX_TEXT_LENGTH) {
+ xmlBufMemoryError(buf, "buffer error: text too long\n");
+ return(-1);
+ }
+ }
if (!xmlBufResize(buf, needSize)){
xmlBufMemoryError(buf, "growing buffer");
return XML_ERR_NO_MEMORY;
}
needSize = buf->use + len + 2;
if (needSize > buf->size){
+ if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) {
+ /*
+ * Used to provide parsing limits
+ */
+ if (needSize >= XML_MAX_TEXT_LENGTH) {
+ xmlBufMemoryError(buf, "buffer error: text too long\n");
+ return(-1);
+ }
+ }
if (!xmlBufResize(buf, needSize)){
xmlBufMemoryError(buf, "growing buffer");
return XML_ERR_NO_MEMORY;