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861 lines
24 KiB
C
861 lines
24 KiB
C
/*
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cparse.c -- Racc Runtime Core
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Copyright (c) 1999-2006 Minero Aoki
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This library is free software.
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You can distribute/modify this program under the same terms of ruby.
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$originalId: cparse.c,v 1.8 2006/07/06 11:39:46 aamine Exp $
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*/
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#include <ruby.h>
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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/* -----------------------------------------------------------------------
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Important Constants
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----------------------------------------------------------------------- */
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#define RACC_VERSION "1.4.15"
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#define DEFAULT_TOKEN -1
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#define ERROR_TOKEN 1
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#define FINAL_TOKEN 0
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#define vDEFAULT_TOKEN INT2FIX(DEFAULT_TOKEN)
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#define vERROR_TOKEN INT2FIX(ERROR_TOKEN)
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#define vFINAL_TOKEN INT2FIX(FINAL_TOKEN)
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/* -----------------------------------------------------------------------
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File Local Variables
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----------------------------------------------------------------------- */
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static VALUE RaccBug;
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static VALUE CparseParams;
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static ID id_yydebug;
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static ID id_nexttoken;
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static ID id_onerror;
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static ID id_noreduce;
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static ID id_errstatus;
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static ID id_d_shift;
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static ID id_d_reduce;
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static ID id_d_accept;
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static ID id_d_read_token;
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static ID id_d_next_state;
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static ID id_d_e_pop;
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/* -----------------------------------------------------------------------
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Utils
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----------------------------------------------------------------------- */
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/* For backward compatibility */
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#ifndef ID2SYM
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# define ID2SYM(i) ULONG2NUM(i)
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#endif
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#ifndef SYM2ID
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# define SYM2ID(v) ((ID)NUM2ULONG(v))
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#endif
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#ifndef SYMBOL_P
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# define SYMBOL_P(v) FIXNUM_P(v)
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#endif
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#ifndef LONG2NUM
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# define LONG2NUM(i) INT2NUM(i)
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#endif
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#ifndef HAVE_RB_ARY_SUBSEQ
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# define rb_ary_subseq(ary, beg, len) rb_ary_new4(len, RARRAY_PTR(ary) + beg)
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#endif
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static ID value_to_id _((VALUE v));
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static inline long num_to_long _((VALUE n));
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static ID
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value_to_id(VALUE v)
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{
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if (! SYMBOL_P(v)) {
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rb_raise(rb_eTypeError, "not symbol");
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}
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return SYM2ID(v);
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}
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static inline long
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num_to_long(VALUE n)
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{
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return NUM2LONG(n);
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}
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#define AREF(s, idx) \
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((0 <= idx && idx < RARRAY_LEN(s)) ? rb_ary_entry(s, idx) : Qnil)
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/* -----------------------------------------------------------------------
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Parser Stack Interfaces
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----------------------------------------------------------------------- */
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static VALUE get_stack_tail _((VALUE stack, long len));
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static void cut_stack_tail _((VALUE stack, long len));
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static VALUE
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get_stack_tail(VALUE stack, long len)
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{
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if (len < 0) return Qnil; /* system error */
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if (len > RARRAY_LEN(stack)) len = RARRAY_LEN(stack);
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return rb_ary_subseq(stack, RARRAY_LEN(stack) - len, len);
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}
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static void
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cut_stack_tail(VALUE stack, long len)
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{
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while (len > 0) {
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rb_ary_pop(stack);
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len--;
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}
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}
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#define STACK_INIT_LEN 64
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#define NEW_STACK() rb_ary_new2(STACK_INIT_LEN)
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#define PUSH(s, i) rb_ary_store(s, RARRAY_LEN(s), i)
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#define POP(s) rb_ary_pop(s)
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#define LAST_I(s) \
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((RARRAY_LEN(s) > 0) ? rb_ary_entry(s, RARRAY_LEN(s) - 1) : Qnil)
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#define GET_TAIL(s, len) get_stack_tail(s, len)
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#define CUT_TAIL(s, len) cut_stack_tail(s, len)
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/* -----------------------------------------------------------------------
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struct cparse_params
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----------------------------------------------------------------------- */
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struct cparse_params {
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VALUE value_v; /* VALUE version of this struct */
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VALUE parser; /* parser object */
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int lex_is_iterator;
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VALUE lexer; /* scanner object */
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ID lexmid; /* name of scanner method (must be an iterator) */
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/* State transition tables (immutable)
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Data structure is from Dragon Book 4.9 */
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/* action table */
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VALUE action_table;
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VALUE action_check;
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VALUE action_default;
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VALUE action_pointer;
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/* goto table */
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VALUE goto_table;
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VALUE goto_check;
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VALUE goto_default;
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VALUE goto_pointer;
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long nt_base; /* NonTerminal BASE index */
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VALUE reduce_table; /* reduce data table */
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VALUE token_table; /* token conversion table */
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/* parser stacks and parameters */
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VALUE state;
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long curstate;
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VALUE vstack;
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VALUE tstack;
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VALUE t;
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long shift_n;
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long reduce_n;
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long ruleno;
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long errstatus; /* nonzero in error recovering mode */
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long nerr; /* number of error */
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int use_result_var;
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VALUE retval; /* return value of parser routine */
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long fin; /* parse result status */
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#define CP_FIN_ACCEPT 1
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#define CP_FIN_EOT 2
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#define CP_FIN_CANTPOP 3
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int debug; /* user level debug */
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int sys_debug; /* system level debug */
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long i; /* table index */
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};
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/* -----------------------------------------------------------------------
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Parser Main Routines
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----------------------------------------------------------------------- */
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static VALUE racc_cparse _((VALUE parser, VALUE arg, VALUE sysdebug));
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static VALUE racc_yyparse _((VALUE parser, VALUE lexer, VALUE lexmid,
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VALUE arg, VALUE sysdebug));
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static void call_lexer _((struct cparse_params *v));
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static VALUE lexer_i _((RB_BLOCK_CALL_FUNC_ARGLIST(block_args, data)));
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static VALUE assert_array _((VALUE a));
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static long assert_integer _((VALUE n));
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static VALUE assert_hash _((VALUE h));
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static VALUE initialize_params _((VALUE vparams, VALUE parser, VALUE arg,
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VALUE lexer, VALUE lexmid));
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static void cparse_params_mark _((void *ptr));
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static size_t cparse_params_memsize _((const void *ptr));
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static void parse_main _((struct cparse_params *v,
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VALUE tok, VALUE val, int resume));
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static void extract_user_token _((struct cparse_params *v,
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VALUE block_args, VALUE *tok, VALUE *val));
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static void shift _((struct cparse_params* v, long act, VALUE tok, VALUE val));
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static int reduce _((struct cparse_params* v, long act));
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static VALUE reduce0 _((VALUE block_args, VALUE data, VALUE self));
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#ifdef DEBUG
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# define D_puts(msg) if (v->sys_debug) puts(msg)
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# define D_printf(fmt,arg) if (v->sys_debug) printf(fmt,arg)
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#else
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# define D_puts(msg)
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# define D_printf(fmt,arg)
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#endif
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#undef RUBY_UNTYPED_DATA_WARNING
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#define RUBY_UNTYPED_DATA_WARNING 1
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static const rb_data_type_t cparse_params_type = {
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"racc/cparse",
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{
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cparse_params_mark,
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RUBY_TYPED_DEFAULT_FREE,
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cparse_params_memsize,
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},
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#ifdef RUBY_TYPED_FREE_IMMEDIATELY
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0, 0,
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RUBY_TYPED_FREE_IMMEDIATELY,
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#endif
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};
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static VALUE
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racc_cparse(VALUE parser, VALUE arg, VALUE sysdebug)
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{
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VALUE vparams;
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struct cparse_params *v;
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vparams = TypedData_Make_Struct(CparseParams, struct cparse_params,
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&cparse_params_type, v);
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D_puts("starting cparse");
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v->sys_debug = RTEST(sysdebug);
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vparams = initialize_params(vparams, parser, arg, Qnil, Qnil);
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v->lex_is_iterator = FALSE;
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parse_main(v, Qnil, Qnil, 0);
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RB_GC_GUARD(vparams);
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return v->retval;
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}
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static VALUE
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racc_yyparse(VALUE parser, VALUE lexer, VALUE lexmid, VALUE arg, VALUE sysdebug)
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{
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VALUE vparams;
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struct cparse_params *v;
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vparams = TypedData_Make_Struct(CparseParams, struct cparse_params,
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&cparse_params_type, v);
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v->sys_debug = RTEST(sysdebug);
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D_puts("start C yyparse");
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vparams = initialize_params(vparams, parser, arg, lexer, lexmid);
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v->lex_is_iterator = TRUE;
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D_puts("params initialized");
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parse_main(v, Qnil, Qnil, 0);
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call_lexer(v);
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if (!v->fin) {
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rb_raise(rb_eArgError, "%s() is finished before EndOfToken",
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rb_id2name(v->lexmid));
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}
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RB_GC_GUARD(vparams);
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return v->retval;
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}
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#ifdef HAVE_RB_BLOCK_CALL
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static void
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call_lexer(struct cparse_params *v)
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{
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rb_block_call(v->lexer, v->lexmid, 0, NULL, lexer_i, v->value_v);
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}
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#else
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static VALUE
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lexer_iter(VALUE data)
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{
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struct cparse_params *v = rb_check_typeddata(data, &cparse_params_type);
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rb_funcall(v->lexer, v->lexmid, 0);
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return Qnil;
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}
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static void
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call_lexer(struct cparse_params *v)
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{
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rb_iterate(lexer_iter, v->value_v, lexer_i, v->value_v);
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}
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#endif
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static VALUE
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lexer_i(RB_BLOCK_CALL_FUNC_ARGLIST(block_args, data))
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{
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struct cparse_params *v = rb_check_typeddata(data, &cparse_params_type);
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VALUE tok, val;
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if (v->fin)
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rb_raise(rb_eArgError, "extra token after EndOfToken");
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extract_user_token(v, block_args, &tok, &val);
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parse_main(v, tok, val, 1);
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if (v->fin && v->fin != CP_FIN_ACCEPT)
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rb_iter_break();
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return Qnil;
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}
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static VALUE
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assert_array(VALUE a)
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{
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Check_Type(a, T_ARRAY);
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return a;
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}
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static VALUE
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assert_hash(VALUE h)
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{
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Check_Type(h, T_HASH);
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return h;
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}
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static long
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assert_integer(VALUE n)
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{
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return NUM2LONG(n);
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}
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static VALUE
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initialize_params(VALUE vparams, VALUE parser, VALUE arg, VALUE lexer, VALUE lexmid)
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{
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struct cparse_params *v = rb_check_typeddata(vparams, &cparse_params_type);
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v->value_v = vparams;
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v->parser = parser;
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v->lexer = lexer;
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if (! NIL_P(lexmid))
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v->lexmid = value_to_id(lexmid);
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v->debug = RTEST(rb_ivar_get(parser, id_yydebug));
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Check_Type(arg, T_ARRAY);
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if (!(13 <= RARRAY_LEN(arg) && RARRAY_LEN(arg) <= 14))
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rb_raise(RaccBug, "[Racc Bug] wrong arg.size %ld", RARRAY_LEN(arg));
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v->action_table = assert_array (rb_ary_entry(arg, 0));
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v->action_check = assert_array (rb_ary_entry(arg, 1));
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v->action_default = assert_array (rb_ary_entry(arg, 2));
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v->action_pointer = assert_array (rb_ary_entry(arg, 3));
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v->goto_table = assert_array (rb_ary_entry(arg, 4));
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v->goto_check = assert_array (rb_ary_entry(arg, 5));
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v->goto_default = assert_array (rb_ary_entry(arg, 6));
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v->goto_pointer = assert_array (rb_ary_entry(arg, 7));
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v->nt_base = assert_integer(rb_ary_entry(arg, 8));
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v->reduce_table = assert_array (rb_ary_entry(arg, 9));
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v->token_table = assert_hash (rb_ary_entry(arg, 10));
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v->shift_n = assert_integer(rb_ary_entry(arg, 11));
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v->reduce_n = assert_integer(rb_ary_entry(arg, 12));
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if (RARRAY_LEN(arg) > 13) {
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v->use_result_var = RTEST(rb_ary_entry(arg, 13));
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}
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else {
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v->use_result_var = TRUE;
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}
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v->tstack = v->debug ? NEW_STACK() : Qnil;
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v->vstack = NEW_STACK();
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v->state = NEW_STACK();
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v->curstate = 0;
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PUSH(v->state, INT2FIX(0));
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v->t = INT2FIX(FINAL_TOKEN + 1); /* must not init to FINAL_TOKEN */
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v->nerr = 0;
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v->errstatus = 0;
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rb_ivar_set(parser, id_errstatus, LONG2NUM(v->errstatus));
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v->retval = Qnil;
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v->fin = 0;
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v->lex_is_iterator = FALSE;
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rb_iv_set(parser, "@vstack", v->vstack);
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if (v->debug) {
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rb_iv_set(parser, "@tstack", v->tstack);
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}
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else {
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rb_iv_set(parser, "@tstack", Qnil);
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}
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return vparams;
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}
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static void
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cparse_params_mark(void *ptr)
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{
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struct cparse_params *v = (struct cparse_params*)ptr;
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rb_gc_mark(v->value_v);
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rb_gc_mark(v->parser);
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rb_gc_mark(v->lexer);
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rb_gc_mark(v->action_table);
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rb_gc_mark(v->action_check);
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rb_gc_mark(v->action_default);
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rb_gc_mark(v->action_pointer);
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rb_gc_mark(v->goto_table);
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rb_gc_mark(v->goto_check);
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rb_gc_mark(v->goto_default);
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rb_gc_mark(v->goto_pointer);
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rb_gc_mark(v->reduce_table);
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rb_gc_mark(v->token_table);
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rb_gc_mark(v->state);
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rb_gc_mark(v->vstack);
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rb_gc_mark(v->tstack);
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rb_gc_mark(v->t);
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rb_gc_mark(v->retval);
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}
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static size_t
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cparse_params_memsize(const void *ptr)
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{
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return sizeof(struct cparse_params);
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}
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static void
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extract_user_token(struct cparse_params *v, VALUE block_args,
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VALUE *tok, VALUE *val)
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{
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if (NIL_P(block_args)) {
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/* EOF */
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*tok = Qfalse;
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*val = rb_str_new("$", 1);
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return;
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}
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if (!RB_TYPE_P(block_args, T_ARRAY)) {
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rb_raise(rb_eTypeError,
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"%s() %s %"PRIsVALUE" (must be Array[2])",
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v->lex_is_iterator ? rb_id2name(v->lexmid) : "next_token",
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v->lex_is_iterator ? "yielded" : "returned",
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rb_obj_class(block_args));
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}
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if (RARRAY_LEN(block_args) != 2) {
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rb_raise(rb_eArgError,
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"%s() %s wrong size of array (%ld for 2)",
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v->lex_is_iterator ? rb_id2name(v->lexmid) : "next_token",
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v->lex_is_iterator ? "yielded" : "returned",
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RARRAY_LEN(block_args));
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}
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*tok = AREF(block_args, 0);
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*val = AREF(block_args, 1);
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}
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#define SHIFT(v,act,tok,val) shift(v,act,tok,val)
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#define REDUCE(v,act) do {\
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switch (reduce(v,act)) { \
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case 0: /* normal */ \
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break; \
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case 1: /* yyerror */ \
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goto user_yyerror; \
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case 2: /* yyaccept */ \
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D_puts("u accept"); \
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goto accept; \
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default: \
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break; \
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} \
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} while (0)
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static void
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parse_main(struct cparse_params *v, VALUE tok, VALUE val, int resume)
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{
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long i; /* table index */
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long act; /* action type */
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VALUE act_value; /* action type, VALUE version */
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int read_next = 1; /* true if we need to read next token */
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VALUE tmp;
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if (resume)
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goto resume;
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while (1) {
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D_puts("");
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D_puts("---- enter new loop ----");
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D_puts("");
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D_printf("(act) k1=%ld\n", v->curstate);
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tmp = AREF(v->action_pointer, v->curstate);
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if (NIL_P(tmp)) goto notfound;
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D_puts("(act) pointer[k1] ok");
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i = NUM2LONG(tmp);
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D_printf("read_next=%d\n", read_next);
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if (read_next && (v->t != vFINAL_TOKEN)) {
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if (v->lex_is_iterator) {
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D_puts("resuming...");
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if (v->fin) rb_raise(rb_eArgError, "token given after EOF");
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v->i = i; /* save i */
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return;
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resume:
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D_puts("resumed");
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i = v->i; /* load i */
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}
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else {
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D_puts("next_token");
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tmp = rb_funcall(v->parser, id_nexttoken, 0);
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extract_user_token(v, tmp, &tok, &val);
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}
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/* convert token */
|
|
v->t = rb_hash_aref(v->token_table, tok);
|
|
if (NIL_P(v->t)) {
|
|
v->t = vERROR_TOKEN;
|
|
}
|
|
D_printf("(act) t(k2)=%ld\n", NUM2LONG(v->t));
|
|
if (v->debug) {
|
|
rb_funcall(v->parser, id_d_read_token,
|
|
3, v->t, tok, val);
|
|
}
|
|
}
|
|
read_next = 0;
|
|
|
|
i += NUM2LONG(v->t);
|
|
D_printf("(act) i=%ld\n", i);
|
|
if (i < 0) goto notfound;
|
|
|
|
act_value = AREF(v->action_table, i);
|
|
if (NIL_P(act_value)) goto notfound;
|
|
act = NUM2LONG(act_value);
|
|
D_printf("(act) table[i]=%ld\n", act);
|
|
|
|
tmp = AREF(v->action_check, i);
|
|
if (NIL_P(tmp)) goto notfound;
|
|
if (NUM2LONG(tmp) != v->curstate) goto notfound;
|
|
D_printf("(act) check[i]=%ld\n", NUM2LONG(tmp));
|
|
|
|
D_puts("(act) found");
|
|
act_fixed:
|
|
D_printf("act=%ld\n", act);
|
|
goto handle_act;
|
|
|
|
notfound:
|
|
D_puts("(act) not found: use default");
|
|
act_value = AREF(v->action_default, v->curstate);
|
|
act = NUM2LONG(act_value);
|
|
goto act_fixed;
|
|
|
|
|
|
handle_act:
|
|
if (act > 0 && act < v->shift_n) {
|
|
D_puts("shift");
|
|
if (v->errstatus > 0) {
|
|
v->errstatus--;
|
|
rb_ivar_set(v->parser, id_errstatus, LONG2NUM(v->errstatus));
|
|
}
|
|
SHIFT(v, act, v->t, val);
|
|
read_next = 1;
|
|
}
|
|
else if (act < 0 && act > -(v->reduce_n)) {
|
|
D_puts("reduce");
|
|
REDUCE(v, act);
|
|
}
|
|
else if (act == -(v->reduce_n)) {
|
|
goto error;
|
|
error_recovered:
|
|
; /* goto label requires stmt */
|
|
}
|
|
else if (act == v->shift_n) {
|
|
D_puts("accept");
|
|
goto accept;
|
|
}
|
|
else {
|
|
rb_raise(RaccBug, "[Racc Bug] unknown act value %ld", act);
|
|
}
|
|
|
|
if (v->debug) {
|
|
rb_funcall(v->parser, id_d_next_state,
|
|
2, LONG2NUM(v->curstate), v->state);
|
|
}
|
|
}
|
|
/* not reach */
|
|
|
|
|
|
accept:
|
|
if (v->debug) rb_funcall(v->parser, id_d_accept, 0);
|
|
v->retval = rb_ary_entry(v->vstack, 0);
|
|
v->fin = CP_FIN_ACCEPT;
|
|
return;
|
|
|
|
|
|
error:
|
|
D_printf("error detected, status=%ld\n", v->errstatus);
|
|
if (v->errstatus == 0) {
|
|
v->nerr++;
|
|
rb_funcall(v->parser, id_onerror,
|
|
3, v->t, val, v->vstack);
|
|
}
|
|
user_yyerror:
|
|
if (v->errstatus == 3) {
|
|
if (v->t == vFINAL_TOKEN) {
|
|
v->retval = Qfalse;
|
|
v->fin = CP_FIN_EOT;
|
|
return;
|
|
}
|
|
read_next = 1;
|
|
}
|
|
v->errstatus = 3;
|
|
rb_ivar_set(v->parser, id_errstatus, LONG2NUM(v->errstatus));
|
|
|
|
/* check if we can shift/reduce error token */
|
|
D_printf("(err) k1=%ld\n", v->curstate);
|
|
D_printf("(err) k2=%d (error)\n", ERROR_TOKEN);
|
|
while (1) {
|
|
tmp = AREF(v->action_pointer, v->curstate);
|
|
if (NIL_P(tmp)) goto error_pop;
|
|
D_puts("(err) pointer[k1] ok");
|
|
|
|
i = NUM2LONG(tmp) + ERROR_TOKEN;
|
|
D_printf("(err) i=%ld\n", i);
|
|
if (i < 0) goto error_pop;
|
|
|
|
act_value = AREF(v->action_table, i);
|
|
if (NIL_P(act_value)) {
|
|
D_puts("(err) table[i] == nil");
|
|
goto error_pop;
|
|
}
|
|
act = NUM2LONG(act_value);
|
|
D_printf("(err) table[i]=%ld\n", act);
|
|
|
|
tmp = AREF(v->action_check, i);
|
|
if (NIL_P(tmp)) {
|
|
D_puts("(err) check[i] == nil");
|
|
goto error_pop;
|
|
}
|
|
if (NUM2LONG(tmp) != v->curstate) {
|
|
D_puts("(err) check[i] != k1");
|
|
goto error_pop;
|
|
}
|
|
|
|
D_puts("(err) found: can handle error token");
|
|
break;
|
|
|
|
error_pop:
|
|
D_puts("(err) act not found: can't handle error token; pop");
|
|
|
|
if (RARRAY_LEN(v->state) <= 1) {
|
|
v->retval = Qnil;
|
|
v->fin = CP_FIN_CANTPOP;
|
|
return;
|
|
}
|
|
POP(v->state);
|
|
POP(v->vstack);
|
|
v->curstate = num_to_long(LAST_I(v->state));
|
|
if (v->debug) {
|
|
POP(v->tstack);
|
|
rb_funcall(v->parser, id_d_e_pop,
|
|
3, v->state, v->tstack, v->vstack);
|
|
}
|
|
}
|
|
|
|
/* shift/reduce error token */
|
|
if (act > 0 && act < v->shift_n) {
|
|
D_puts("e shift");
|
|
SHIFT(v, act, ERROR_TOKEN, val);
|
|
}
|
|
else if (act < 0 && act > -(v->reduce_n)) {
|
|
D_puts("e reduce");
|
|
REDUCE(v, act);
|
|
}
|
|
else if (act == v->shift_n) {
|
|
D_puts("e accept");
|
|
goto accept;
|
|
}
|
|
else {
|
|
rb_raise(RaccBug, "[Racc Bug] unknown act value %ld", act);
|
|
}
|
|
goto error_recovered;
|
|
}
|
|
|
|
static void
|
|
shift(struct cparse_params *v, long act, VALUE tok, VALUE val)
|
|
{
|
|
PUSH(v->vstack, val);
|
|
if (v->debug) {
|
|
PUSH(v->tstack, tok);
|
|
rb_funcall(v->parser, id_d_shift,
|
|
3, tok, v->tstack, v->vstack);
|
|
}
|
|
v->curstate = act;
|
|
PUSH(v->state, LONG2NUM(v->curstate));
|
|
}
|
|
|
|
static int
|
|
reduce(struct cparse_params *v, long act)
|
|
{
|
|
VALUE code;
|
|
v->ruleno = -act * 3;
|
|
code = rb_catch("racc_jump", reduce0, v->value_v);
|
|
v->errstatus = num_to_long(rb_ivar_get(v->parser, id_errstatus));
|
|
return NUM2INT(code);
|
|
}
|
|
|
|
static VALUE
|
|
reduce0(VALUE val, VALUE data, VALUE self)
|
|
{
|
|
struct cparse_params *v = rb_check_typeddata(data, &cparse_params_type);
|
|
VALUE reduce_to, reduce_len, method_id;
|
|
long len;
|
|
ID mid;
|
|
VALUE tmp, tmp_t = Qundef, tmp_v = Qundef;
|
|
long i, k1, k2;
|
|
VALUE goto_state;
|
|
|
|
reduce_len = rb_ary_entry(v->reduce_table, v->ruleno);
|
|
reduce_to = rb_ary_entry(v->reduce_table, v->ruleno+1);
|
|
method_id = rb_ary_entry(v->reduce_table, v->ruleno+2);
|
|
len = NUM2LONG(reduce_len);
|
|
mid = value_to_id(method_id);
|
|
|
|
/* call action */
|
|
if (len == 0) {
|
|
tmp = Qnil;
|
|
if (mid != id_noreduce)
|
|
tmp_v = rb_ary_new();
|
|
if (v->debug)
|
|
tmp_t = rb_ary_new();
|
|
}
|
|
else {
|
|
if (mid != id_noreduce) {
|
|
tmp_v = GET_TAIL(v->vstack, len);
|
|
tmp = rb_ary_entry(tmp_v, 0);
|
|
}
|
|
else {
|
|
tmp = rb_ary_entry(v->vstack, RARRAY_LEN(v->vstack) - len);
|
|
}
|
|
CUT_TAIL(v->vstack, len);
|
|
if (v->debug) {
|
|
tmp_t = GET_TAIL(v->tstack, len);
|
|
CUT_TAIL(v->tstack, len);
|
|
}
|
|
CUT_TAIL(v->state, len);
|
|
}
|
|
if (mid != id_noreduce) {
|
|
if (v->use_result_var) {
|
|
tmp = rb_funcall(v->parser, mid,
|
|
3, tmp_v, v->vstack, tmp);
|
|
}
|
|
else {
|
|
tmp = rb_funcall(v->parser, mid,
|
|
2, tmp_v, v->vstack);
|
|
}
|
|
}
|
|
|
|
/* then push result */
|
|
PUSH(v->vstack, tmp);
|
|
if (v->debug) {
|
|
PUSH(v->tstack, reduce_to);
|
|
rb_funcall(v->parser, id_d_reduce,
|
|
4, tmp_t, reduce_to, v->tstack, v->vstack);
|
|
}
|
|
|
|
/* calculate transition state */
|
|
if (RARRAY_LEN(v->state) == 0)
|
|
rb_raise(RaccBug, "state stack unexpectedly empty");
|
|
k2 = num_to_long(LAST_I(v->state));
|
|
k1 = num_to_long(reduce_to) - v->nt_base;
|
|
D_printf("(goto) k1=%ld\n", k1);
|
|
D_printf("(goto) k2=%ld\n", k2);
|
|
|
|
tmp = AREF(v->goto_pointer, k1);
|
|
if (NIL_P(tmp)) goto notfound;
|
|
|
|
i = NUM2LONG(tmp) + k2;
|
|
D_printf("(goto) i=%ld\n", i);
|
|
if (i < 0) goto notfound;
|
|
|
|
goto_state = AREF(v->goto_table, i);
|
|
if (NIL_P(goto_state)) {
|
|
D_puts("(goto) table[i] == nil");
|
|
goto notfound;
|
|
}
|
|
D_printf("(goto) table[i]=%ld (goto_state)\n", NUM2LONG(goto_state));
|
|
|
|
tmp = AREF(v->goto_check, i);
|
|
if (NIL_P(tmp)) {
|
|
D_puts("(goto) check[i] == nil");
|
|
goto notfound;
|
|
}
|
|
if (tmp != LONG2NUM(k1)) {
|
|
D_puts("(goto) check[i] != table[i]");
|
|
goto notfound;
|
|
}
|
|
D_printf("(goto) check[i]=%ld\n", NUM2LONG(tmp));
|
|
|
|
D_puts("(goto) found");
|
|
transit:
|
|
PUSH(v->state, goto_state);
|
|
v->curstate = NUM2LONG(goto_state);
|
|
return INT2FIX(0);
|
|
|
|
notfound:
|
|
D_puts("(goto) not found: use default");
|
|
/* overwrite `goto-state' by default value */
|
|
goto_state = AREF(v->goto_default, k1);
|
|
goto transit;
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------
|
|
Ruby Interface
|
|
----------------------------------------------------------------------- */
|
|
|
|
void
|
|
Init_cparse(void)
|
|
{
|
|
#undef rb_intern
|
|
#define rb_intern(str) rb_intern_const(str)
|
|
VALUE Racc, Parser;
|
|
ID id_racc = rb_intern("Racc");
|
|
|
|
if (rb_const_defined(rb_cObject, id_racc)) {
|
|
Racc = rb_const_get(rb_cObject, id_racc);
|
|
Parser = rb_const_get_at(Racc, rb_intern("Parser"));
|
|
}
|
|
else {
|
|
Racc = rb_define_module("Racc");
|
|
Parser = rb_define_class_under(Racc, "Parser", rb_cObject);
|
|
}
|
|
rb_define_private_method(Parser, "_racc_do_parse_c", racc_cparse, 2);
|
|
rb_define_private_method(Parser, "_racc_yyparse_c", racc_yyparse, 4);
|
|
rb_define_const(Parser, "Racc_Runtime_Core_Version_C",
|
|
rb_str_new2(RACC_VERSION));
|
|
rb_define_const(Parser, "Racc_Runtime_Core_Id_C",
|
|
rb_str_new2("$originalId: cparse.c,v 1.8 2006/07/06 11:39:46 aamine Exp $"));
|
|
|
|
CparseParams = rb_define_class_under(Racc, "CparseParams", rb_cObject);
|
|
rb_undef_alloc_func(CparseParams);
|
|
rb_undef_method(CparseParams, "initialize");
|
|
rb_undef_method(CparseParams, "initialize_copy");
|
|
|
|
RaccBug = rb_eRuntimeError;
|
|
|
|
id_yydebug = rb_intern("@yydebug");
|
|
id_nexttoken = rb_intern("next_token");
|
|
id_onerror = rb_intern("on_error");
|
|
id_noreduce = rb_intern("_reduce_none");
|
|
id_errstatus = rb_intern("@racc_error_status");
|
|
|
|
id_d_shift = rb_intern("racc_shift");
|
|
id_d_reduce = rb_intern("racc_reduce");
|
|
id_d_accept = rb_intern("racc_accept");
|
|
id_d_read_token = rb_intern("racc_read_token");
|
|
id_d_next_state = rb_intern("racc_next_state");
|
|
id_d_e_pop = rb_intern("racc_e_pop");
|
|
}
|