286 lines
6.3 KiB
C
286 lines
6.3 KiB
C
/**************************************************************************
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* *
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* File: iopreds.h *
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* Last rev: 5/2/88 *
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* mods: *
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* comments: Input/Output C implemented predicates *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "%W% %G%";
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#endif
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#ifndef YAPSTREAMS_H
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#define YAPSTREAMS_H 1
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#if HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#if HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#define YAP_ERROR NIL
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#define MaxStreams 64
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#define EXPAND_FILENAME 0x000080
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#define StdInStream 0
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#define StdOutStream 1
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#define StdErrStream 2
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#define ALIASES_BLOCK_SIZE 8
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#if _WIN32
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#define USE_SOCKET 1
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#define HAVE_SOCKET 1
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#endif
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//#include "Atoms.h"
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//#include "Yap.h"
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#include <stdlib.h>
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/*
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* This file defines main data-structure for stream management,
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*
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*/
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#if defined(_MSC_VER) || defined(__MINGW32__)
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#include <windows.h>
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#endif
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#include <wchar.h>
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/************ SWI compatible support for unicode representations ************/
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typedef struct yap_io_position {
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int64_t byteno; /* byte-position in file */
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int64_t charno; /* character position in file */
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long int lineno; /* lineno in file */
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long int linepos; /* position in line */
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intptr_t reserved[2]; /* future extensions */
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} yapIOPOS;
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#ifndef _PL_STREAM_H
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typedef struct {
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YAP_Atom file; /* current source file */
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yapIOPOS position; /* Line, line pos, char and byte */
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} yapSourceLocation;
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#endif
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#define RD_MAGIC 0xefebe128
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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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yapIOPOS 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 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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struct stream_desc *stream;
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FILE *f; /* file. of known */
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YAP_Term position; /* Line, line pos, char and byte */
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void *posp; /* position pointer */
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size_t posi; /* position number */
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YAP_Term subtpos; /* Report Subterm positions */
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bool cycles; /* Re-establish cycles */
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yapSourceLocation start_of_term; /* Position of start of term */
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struct mod_entry *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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YAP_Atom on_error; /* Handling of syntax errors */
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int has_exception; /* exception is raised */
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YAP_Term exception; /* raised exception */
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YAP_Term variables; /* report variables */
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YAP_Term singles; /* Report singleton variables */
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YAP_Term varnames; /* Report variables+names */
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int strictness; /* Strictness level */
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#ifdef O_QUASIQUOTATIONS
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YAP_Term quasi_quotations; /* User option quasi_quotations(QQ) */
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YAP_Term qq; /* Quasi quoted list */
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YAP_Term qq_tail; /* Tail of the quoted stuff */
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#endif
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YAP_Term comments; /* Report comments */
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} read_data, *ReadData;
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#if __APPLE__
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#include "fmemopen.h"
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#define HAVE_FMEMOPEN 1
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#define HAVE_OPEN_MEMSTREAM 1
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FILE *open_memstream(char **buf, size_t *len);
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#endif
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#if __ANDROID__
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#undef HAVE_FMEMOPEN
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#undef HAVE_OPEN_MEMSTREAM
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#endif
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#if HAVE_FMEMOPEN
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#define MAY_READ 1
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#endif
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#if HAVE_OPEN_MEMSTREAM
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#define MAY_READ 1
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#define MAY_WRITE 1
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#endif
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#if _WIN32
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#undef MAY_WRITE
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#undef MAY_READ
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#endif
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typedef struct mem_desc {
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char *buf; /* where the file is being read from/written to */
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int src; /* where the space comes from, 0 code space, 1 malloc */
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YAP_Int max_size; /* maximum buffer size (may be changed dynamically) */
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YAP_UInt pos; /* cursor */
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volatile void *error_handler;
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} memHandle;
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#if HAVE_SOCKET
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typedef enum { /* in YAP, sockets may be in one of 4 possible status */
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new_socket,
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server_socket,
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client_socket,
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server_session_socket,
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closed_socket
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} socket_info;
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typedef enum { /* we accept two domains for the moment, IPV6 may follow */
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af_inet, /* IPV4 */
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af_unix /* or AF_FILE */
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} socket_domain;
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#endif
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#define Quote_illegal_f 0x01
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#define Ignore_ops_f 0x02
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#define Handle_vars_f 0x04
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#define Use_portray_f 0x08
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#define To_heap_f 0x10
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#define Unfold_cyclics_f 0x20
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#define Use_SWI_Stream_f 0x40
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#define BackQuote_String_f 0x80
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#define AttVar_None_f 0x100
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#define AttVar_Dots_f 0x200
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#define AttVar_Portray_f 0x400
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#define Blob_Portray_f 0x800
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#define No_Escapes_f 0x1000
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#define No_Brace_Terms_f 0x2000
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#define Fullstop_f 0x4000
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#define New_Line_f 0x8000
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typedef struct stream_desc {
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YAP_Atom name;
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YAP_Term user_name;
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FILE *file;
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// useful in memory streams
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char *nbuf;
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size_t nsize;
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union {
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struct {
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#define PLGETC_BUF_SIZE 4096
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unsigned char *buf, *ptr;
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int left;
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} file;
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memHandle mem_string;
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struct {
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int fd;
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} pipe;
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#if HAVE_SOCKET
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struct {
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socket_domain domain;
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socket_info flags;
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int fd;
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} socket;
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#endif
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struct {
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const unsigned char *buf, *ptr;
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} irl;
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} u;
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YAP_Int charcount, linecount, linepos;
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stream_flags_t status;
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#if defined(YAPOR) || defined(THREADS)
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lockvar streamlock; /* protect stream access */
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#endif
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int (*stream_putc)(
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int, int); /** function the stream uses for writing a single octet */
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int (*stream_wputc)(
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int, wchar_t); /** function the stream uses for writing a character */
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int (*stream_getc)(int); /** function the stream uses for reading an octet. */
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int (*stream_wgetc)(
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int); /** function the stream uses for reading a character. */
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struct vfs *vfs; /** stream belongs to a space */
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void *vfs_handle; /** direct handle to stream in that space. */
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int (*stream_wgetc_for_read)(
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int); /* function the stream uses for parser. It may be different
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from above if the ISO character conversion is on */
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encoding_t encoding; /** current encoding for stream */
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} StreamDesc;
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#endif
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