76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/* S Y N T A X E R R O R R E P O R T I N G */
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/* Defines the LLmessage routine. LLgen-generated parsers require the
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existence of a routine of that name.
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The routine must do syntax-error reporting and must be able to
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insert tokens in the token stream.
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*/
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#include <alloc.h>
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#include <em_arith.h>
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#include <em_label.h>
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#include "LLlex.h"
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#include "Lpars.h"
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#include "idf.h"
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#include "type.h"
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extern char *symbol2str();
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extern char *Malloc(), *Salloc();
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extern struct idf *gen_anon_idf();
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extern int expect_label;
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LLmessage(tk)
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register int tk;
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{
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if( tk > 0 ) {
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/* if( tk > 0 ), it represents the token to be inserted.
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*/
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register struct token *dotp = ˙
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error("%s missing before %s", symbol2str(tk), symbol2str(dotp->tk_symb));
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aside = *dotp;
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asidetype = toktype;
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dotp->tk_symb = tk;
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switch( tk ) {
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/* The operands need some body */
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case IDENT:
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dotp->TOK_IDF = gen_anon_idf();
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break;
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case STRING:
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dotp->tk_data.tk_str = (struct string *)
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Malloc(sizeof (struct string));
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dotp->TOK_SLE = 1;
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dotp->TOK_STR = Salloc("", 1);
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toktype = standard_type(T_STRINGCONST, 1, (arith) 1);
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break;
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case INTEGER:
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toktype = int_type;
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if( !expect_label )
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dotp->TOK_INT = 1;
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else
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dotp->TOK_INT = -1;
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break;
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case REAL:
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dotp->tk_data.tk_real = (struct real *)
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Malloc(sizeof(struct real));
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/* inverse struct */
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dotp->TOK_RIV = (struct real *)
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Malloc(sizeof(struct real));
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dotp->TOK_RIV->r_inverse = dotp->tk_data.tk_real;
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/* sign */
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dotp->TOK_RSI = 0;
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dotp->TOK_RIV->r_sign = 1;
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dotp->TOK_REL = Salloc("0.0", 4);
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toktype = real_type;
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break;
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}
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}
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else if( tk < 0 ) error("garbage at end of program");
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else error("%s deleted", symbol2str(dot.tk_symb));
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}
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