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This commit is contained in:
Vitor Santos Costa 2016-06-17 17:21:41 +01:00
parent a382ca43fa
commit 2b9b92dac7
2 changed files with 415 additions and 0 deletions
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130
include/VFS.h Normal file
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/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: VFS.h *
* Last rev: 5/2/88 *
* mods: *
* comments: Virtual File System Access for YAP *
* *
*************************************************************************/
#ifndef VFS_H
#define VFS_H 1
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
typedef struct {
dev_t st_dev; /* ID of device containing file */
mode_t st_mode; /* Mode of file (see below) */
uid_t st_uid; /* User ID of the file */
gid_t st_gid; /* Group ID of the file */
struct timespec st_atimespec; /* time of last access */
struct timespec st_mtimespec; /* time of last data modification */
struct timespec st_ctimespec; /* time of last status change */
struct timespec st_birthtimespec; /* time of file creation(birth) */
#if __ANDROID__
off64_t st_size; /* file size, in bytes */
#else
off_t st_size; /* file size, in bytes */
#endif
} vfs_stat;
typedef enum vfs_flags {
VFS_CAN_WRITE = 0x1, /// we can write to files in this space
VFS_CAN_EXEC = 0x2, /// we can execute files in this space
VFS_CAN_SEEK = 0x4, /// we can seek within files in this space
VFS_HAS_PREFIX = 0x8, /// has a prefix that identifies a file in this space
VFS_HAS_SUFFIX = 0x10, /// has a suffix that describes the file.
VFS_HAS_FUNCTION = 0x10, /// has a suffix that describes the file.
} vfs_flags_t;
typedef union {
struct vfs *vfs;
uintptr_t cell;
size_t sz;
void *pt;
uintptr_t scalar;
#if __ANDROID__
AAssetManager *mgr;
AAsset *asset;
#endif
} cell_size_t;
typedef struct vfs {
const char *name; /// A text that explains the file system
uintptr_t vflags; /// the main flags describing the operation of the Fs.
/// a way to identify a file in this VFS: two special cases, prefix and suffix
const char *prefix;
const char *suffix;
bool (*id)(struct vfs *me, const char *s);
/** operations */
bool (*open)(struct vfs *me, struct stream_desc *st, const char *s,
const char *io_mode);
; /// open an object
/// in this space, usual w,r,a,b flags plus B (store in a buffer)
bool (*close)(struct stream_desc *stream); /// close the object
int (*get_char)(struct stream_desc *stream); /// get an octet to the stream
int (*putc)(int ch,
struct stream_desc *stream); /// output an octet to the stream
int64_t (*seek)(struct stream_desc *stream, int64_t offset,
int whence); /// jump around the stream
void *(*opendir)(struct vfs *me,
const char *s); /// open a directory object, if one exists
const char *(*nextdir)(
void *d); /// walk to the next entry in a directory object
void (*closedir)(void *d);
; /// close access a directory object
bool (*stat)(struct vfs *me, const char *s,
vfs_stat *); /// obtain size, age, permissions of a file.
bool (*isdir)(struct vfs *me, const char *s); /// verify whether is directory.
bool (*exists)(struct vfs *me,
const char *s); /// verify whether a file exists.
bool (*chdir)(struct vfs *me,
const char *s); /// set working directory (may be virtual).
encoding_t enc; /// how the file is encoded.
YAP_Term (*parsers)(void *stream); // a set of parsers that can read the
// stream and generate a YAP_Term
int (*writers)(int ch, void *stream);
; /// convert a YAP_Term into this space
const char *virtual_cwd;
/** VFS dep
endent area */
cell_size_t priv[4];
struct vfs *next;
} VFS_t;
extern VFS_t *GLOBAL_VFS;
static inline VFS_t *vfs_owner(const char *fname) {
return NULL;
VFS_t *me = GLOBAL_VFS;
int d;
YAP_Int sz0 = strlen(fname);
while (me) {
if (me->vflags & VFS_HAS_PREFIX && strstr(fname, me->prefix))
return me;
YAP_Int sz = strlen(me->suffix);
;
if (me->vflags & VFS_HAS_SUFFIX && (d = (sz0 - sz)) >= 0 &&
strcmp(fname + d, me->suffix) == 0)
return me;
if (me->vflags & VFS_HAS_FUNCTION && (me->id(me, fname))) {
return me;
}
me = me->next;
}
return NULL;
}
#endif

285
include/YAPStreams.h Normal file
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/**************************************************************************
* *
* File: iopreds.h *
* Last rev: 5/2/88 *
* mods: *
* comments: Input/Output C implemented predicates *
* *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "%W% %G%";
#endif
#ifndef YAPSTREAMS_H
#define YAPSTREAMS_H 1
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#define YAP_ERROR NIL
#define MaxStreams 64
#define EXPAND_FILENAME 0x000080
#define StdInStream 0
#define StdOutStream 1
#define StdErrStream 2
#define ALIASES_BLOCK_SIZE 8
#if _WIN32
#define USE_SOCKET 1
#define HAVE_SOCKET 1
#endif
//#include "Atoms.h"
//#include "Yap.h"
#include <stdlib.h>
/*
* This file defines main data-structure for stream management,
*
*/
#if defined(_MSC_VER) || defined(__MINGW32__)
#include <windows.h>
#endif
#include <wchar.h>
/************ SWI compatible support for unicode representations ************/
typedef struct yap_io_position {
int64_t byteno; /* byte-position in file */
int64_t charno; /* character position in file */
long int lineno; /* lineno in file */
long int linepos; /* position in line */
intptr_t reserved[2]; /* future extensions */
} yapIOPOS;
#ifndef _PL_STREAM_H
typedef struct {
YAP_Atom file; /* current source file */
yapIOPOS position; /* Line, line pos, char and byte */
} yapSourceLocation;
#endif
#define RD_MAGIC 0xefebe128
typedef struct vlist_struct_t {
struct VARSTRUCT *ve;
struct vlist_struct_t *next;
} vlist_t;
typedef struct qq_struct_t {
unsigned char *text;
yapIOPOS start, mid, end;
vlist_t *vlist;
struct qq_struct_t *next;
} qq_t;
typedef struct read_data_t {
unsigned char *here; /* current character */
unsigned char *base; /* base of clause */
unsigned char *end; /* end of the clause */
unsigned char *token_start; /* start of most recent read token */
int magic; /* RD_MAGIC */
struct stream_desc *stream;
FILE *f; /* file. of known */
YAP_Term position; /* Line, line pos, char and byte */
void *posp; /* position pointer */
size_t posi; /* position number */
YAP_Term subtpos; /* Report Subterm positions */
bool cycles; /* Re-establish cycles */
yapSourceLocation start_of_term; /* Position of start of term */
struct mod_entry *module; /* Current source module */
unsigned int flags; /* Module syntax flags */
int styleCheck; /* style-checking mask */
bool backquoted_string; /* Read `hello` as string */
int *char_conversion_table; /* active conversion table */
YAP_Atom on_error; /* Handling of syntax errors */
int has_exception; /* exception is raised */
YAP_Term exception; /* raised exception */
YAP_Term variables; /* report variables */
YAP_Term singles; /* Report singleton variables */
YAP_Term varnames; /* Report variables+names */
int strictness; /* Strictness level */
#ifdef O_QUASIQUOTATIONS
YAP_Term quasi_quotations; /* User option quasi_quotations(QQ) */
YAP_Term qq; /* Quasi quoted list */
YAP_Term qq_tail; /* Tail of the quoted stuff */
#endif
YAP_Term comments; /* Report comments */
} read_data, *ReadData;
#if __APPLE__
#include "fmemopen.h"
#define HAVE_FMEMOPEN 1
#define HAVE_OPEN_MEMSTREAM 1
FILE *open_memstream(char **buf, size_t *len);
#endif
#if __ANDROID__
#undef HAVE_FMEMOPEN
#undef HAVE_OPEN_MEMSTREAM
#endif
#if HAVE_FMEMOPEN
#define MAY_READ 1
#endif
#if HAVE_OPEN_MEMSTREAM
#define MAY_READ 1
#define MAY_WRITE 1
#endif
#if _WIN32
#undef MAY_WRITE
#undef MAY_READ
#endif
typedef struct mem_desc {
char *buf; /* where the file is being read from/written to */
int src; /* where the space comes from, 0 code space, 1 malloc */
YAP_Int max_size; /* maximum buffer size (may be changed dynamically) */
YAP_UInt pos; /* cursor */
volatile void *error_handler;
} memHandle;
#if HAVE_SOCKET
typedef enum { /* in YAP, sockets may be in one of 4 possible status */
new_socket,
server_socket,
client_socket,
server_session_socket,
closed_socket
} socket_info;
typedef enum { /* we accept two domains for the moment, IPV6 may follow */
af_inet, /* IPV4 */
af_unix /* or AF_FILE */
} socket_domain;
#endif
#define Quote_illegal_f 0x01
#define Ignore_ops_f 0x02
#define Handle_vars_f 0x04
#define Use_portray_f 0x08
#define To_heap_f 0x10
#define Unfold_cyclics_f 0x20
#define Use_SWI_Stream_f 0x40
#define BackQuote_String_f 0x80
#define AttVar_None_f 0x100
#define AttVar_Dots_f 0x200
#define AttVar_Portray_f 0x400
#define Blob_Portray_f 0x800
#define No_Escapes_f 0x1000
#define No_Brace_Terms_f 0x2000
#define Fullstop_f 0x4000
#define New_Line_f 0x8000
typedef struct stream_desc {
YAP_Atom name;
YAP_Term user_name;
FILE *file;
// useful in memory streams
char *nbuf;
size_t nsize;
union {
struct {
#define PLGETC_BUF_SIZE 4096
unsigned char *buf, *ptr;
int left;
} file;
memHandle mem_string;
struct {
int fd;
} pipe;
#if HAVE_SOCKET
struct {
socket_domain domain;
socket_info flags;
int fd;
} socket;
#endif
struct {
const unsigned char *buf, *ptr;
} irl;
} u;
YAP_Int charcount, linecount, linepos;
stream_flags_t status;
#if defined(YAPOR) || defined(THREADS)
lockvar streamlock; /* protect stream access */
#endif
int (*stream_putc)(
int, int); /** function the stream uses for writing a single octet */
int (*stream_wputc)(
int, wchar_t); /** function the stream uses for writing a character */
int (*stream_getc)(int); /** function the stream uses for reading an octet. */
int (*stream_wgetc)(
int); /** function the stream uses for reading a character. */
struct vfs *vfs; /** stream belongs to a space */
void *vfs_handle; /** direct handle to stream in that space. */
int (*stream_wgetc_for_read)(
int); /* function the stream uses for parser. It may be different
from above if the ISO character conversion is on */
encoding_t encoding; /** current encoding for stream */
} StreamDesc;
#endif