Because the documentation is not yet up to date, here is an example of
reusing the allocated memory in input streams and token streams:
for (i=0; i<iterations; i++) {
// Run the parser.
//
psr->start(psr);
// --------------------------------------
// Now reset everything for the next run.
// Order of calls is important.
// Input stream can now be reused
//
input->reuse(input, sourceCode, sourceLen, sourceName);
// Reset the common token stream so that it will reuse its resources
//
tstream->reset(tstream);
// Reset the lexer (new function generated by antlr now)
//
lxr->reset(lxr);
// Reset the parser (new function generated by antlr now)
//
psr->reset(psr);
}
Note that tree parsers cannot reuse their allocations but this is rarely an
issue. The input->reuse() will reuse any memory it has allocated, but
requires that you handle the reading of the input files (or otherwise supply
a pointer to them). The input files are assumed to be encoded in the way
that the original input was created, for instance:
input = antlr3FileStreamNew(fname, ANTLR3_ENC_8BIT);
Then all reused input must be 8 bit encoded.
Jim
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