119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
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typedef struct vlist_struct_t {
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struct VARSTRUCT *ve;
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struct vlist_struct_t *next;
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} vlist_t;
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typedef struct qq_struct_t {
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unsigned char *text;
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IOPOS start, mid, end;
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vlist_t *vlist;
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struct qq_struct_t *next;
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} qq_t;
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typedef unsigned char * ucharp;
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typedef const unsigned char * cucharp;
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#define utf8_get_uchar(s, chr) (ucharp)utf8_get_char((char *)(s), chr)
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#define FASTBUFFERSIZE 256 /* read quickly upto this size */
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struct read_buffer
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{ int size; /* current size of read buffer */
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unsigned char *base; /* base of read buffer */
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unsigned char *here; /* current position in read buffer */
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unsigned char *end; /* end of the valid buffer */
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IOSTREAM *stream; /* stream we are reading from */
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unsigned char fast[FASTBUFFERSIZE]; /* Quick internal buffer */
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};
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#define RD_MAGIC 0xefebe128
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typedef struct read_data_t
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{ unsigned char *here; /* current character */
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unsigned char *base; /* base of clause */
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unsigned char *end; /* end of the clause */
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unsigned char *token_start; /* start of most recent read token */
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int magic; /* RD_MAGIC */
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IOPOS position; /* Line, line pos, char and byte */
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unsigned char *posp; /* position pointer */
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size_t posi; /* position number */
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term_t subtpos; /* Report Subterm positions */
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bool cycles; /* Re-establish cycles */
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source_location start_of_term; /* Position of start of term */
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module_t module; /* Current source module */
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unsigned int flags; /* Module syntax flags */
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int styleCheck; /* style-checking mask */
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bool backquoted_string; /* Read `hello` as string */
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int *char_conversion_table; /* active conversion table */
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atom_t on_error; /* Handling of syntax errors */
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int has_exception; /* exception is raised */
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term_t exception; /* raised exception */
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term_t variables; /* report variables */
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term_t singles; /* Report singleton variables */
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term_t varnames; /* Report variables+names */
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int strictness; /* Strictness level */
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#ifdef O_QUASIQUOTATIONS
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term_t quasi_quotations; /* User option quasi_quotations(QQ) */
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term_t qq; /* Quasi quoted list */
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term_t qq_tail; /* Tail of the quoted stuff */
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#endif
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term_t comments; /* Report comments */
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struct read_buffer _rb; /* keep read characters here */
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} read_data, *ReadData;
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#define rdhere (_PL_rd->here)
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#define rdbase (_PL_rd->base)
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#define rdend (_PL_rd->end)
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#define last_token_start (_PL_rd->token_start)
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#define rb (_PL_rd->_rb)
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#define DO_CHARESCAPE true(_PL_rd, M_CHARESCAPE)
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extern IOFUNCTIONS Sstringfunctions;
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#ifndef NULL_ATOM
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#define NULL_ATOM 0
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#endif
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static inline void
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setCurrentSourceLocation(ReadData _PL_rd ARG_LD)
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{ atom_t a;
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IOSTREAM *s = rb.stream;
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if ( (a = fileNameStream(s)) )
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_PL_rd->start_of_term.file = a;
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else
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_PL_rd->start_of_term.file = NULL_ATOM;
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if ( s->position )
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{ _PL_rd->start_of_term.position.lineno = s->position->lineno;
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_PL_rd->start_of_term.position.linepos = s->position->linepos - 1;
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_PL_rd->start_of_term.position.charno = s->position->charno - 1;
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/* byteno maintained get getchr__() */
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} else
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{ _PL_rd->start_of_term.position.lineno = -1;
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_PL_rd->start_of_term.position.linepos = -1;
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_PL_rd->start_of_term.position.charno = 0;
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_PL_rd->start_of_term.position.byteno = 0;
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}
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LD->read_source = _PL_rd->start_of_term;
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}
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extern int Yap_read_term(term_t t, IOSTREAM *st, struct read_data_t *rdt);
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/* parser.c */
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extern Term Yap_Parse( struct read_data_t *);
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extern void init_read_data( struct read_data_t *, IOSTREAM *st ARG_LD);
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extern void free_read_data( struct read_data_t *);
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