50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/* T O K E N D E S C R I P T O R D E F I N I T I O N */
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/* Structure to store a string constant
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*/
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struct string {
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arith s_length; /* length of a string */
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char *s_str; /* the string itself */
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label s_lab; /* data label of string */
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};
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/* Structure to store a real constant
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*/
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struct real {
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char *r_real; /* string representation of real */
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struct real *r_inverse; /* the inverse of this real */
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label r_lab; /* data label of real */
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int r_sign; /* positive or negative */
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};
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/* Token structure. Keep it small, as it is part of a parse-tree node
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*/
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struct token {
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short tk_symb; /* token itself */
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unsigned short tk_lineno; /* linenumber on which it occurred */
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union {
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struct idf *tk_idf; /* IDENT */
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struct string *tk_str; /* STRING */
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arith tk_int; /* INTEGER */
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struct real *tk_real; /* REAL */
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struct def *tk_def; /* only used in parse tree node */
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arith *tk_set; /* only used in parse tree node */
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label tk_lab; /* only used in parse tree node */
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} tk_data;
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};
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#define TOK_IDF tk_data.tk_idf
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#define TOK_STR tk_data.tk_str->s_str
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#define TOK_SLE tk_data.tk_str->s_length
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#define TOK_SLA tk_data.tk_str->s_lab
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#define TOK_INT tk_data.tk_int
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#define TOK_REL tk_data.tk_real->r_real
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#define TOK_RIV tk_data.tk_real->r_inverse
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#define TOK_RLA tk_data.tk_real->r_lab
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#define TOK_RSI tk_data.tk_real->r_sign
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extern struct token dot, aside;
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extern struct type *toktype, *asidetype;
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#define ASIDE aside.tk_symb
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