Reentrant library #31
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hashtab.cpp: do not use yaep_free() on memory obtained with operator new().
Required for vnmakarov#12.
Hack for vnmakarov#12 while using the current API.
As a test, eliminate the static global variable anode_cost. Required for vnmakarov#12.
Eliminate all global variables not needed in sread_terminal() or sread_rule(). Required for vnmakarov#12.
Eliminate remaining global variables used by sread_terminal() and sread_rule() by passing parser data via reentrancy hack. Required for vnmakarov#12.
Make sgramm.y compatible with older bison versions.
Extend hack introduced in a57380f for vnmakarov#12.
Required for vnmakarov#12.
Required for vnmakarov#12.
Required for vnmakarov#12.
Hide debug variables n_parse_term_nodes, n_parse_abstract_nodes, and n_parse_alt_nodes when NO_YAEP_DEBUG_PRINT is defined.
Required for vnmakarov#12.
Required for vnmakarov#12.
Required for vnmakarov#12.
Avoids warnings in C and errors in C++.
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This PR should make the YAEP library mostly reentrant without changing the public API. I haven't fixed the following three things:
syntax_error,parse_alloc, andparse_free. The other callbacks can receive such a pointer somewhat awkwardly, viastruct _yaep_reentrant_hack. Changing this would require changing the public API.read_rulehas static local variables. But this function is only used for tests, so it should be OK.all_searchesandall_collisionsremain. In single-threaded usage, they'll work as intended. In multi-threaded usage, concurrent access is technically undefined behavior, though practically, the worst that can happen is that their value is trashed. Since these variables are used for debugging purposes only, they should not affect the behavior of the library per se.This PR supersedes #21.