| Qore Programming Language - C/C++ Library 1.0.8

QoreFile.h
1 /* -*- mode: c++; indent-tabs-mode: nil -*- */
2 /*
3 QoreFile.h
4
5 thread-safe File object
6
7 Qore Programming Language
8
9 Copyright (C) 2003 - 2019 Qore Technologies, s.r.o.
10
11 Permission is hereby granted, free of charge, to any person obtaining a
12 copy of this software and associated documentation files (the "Software"),
13 to deal in the Software without restriction, including without limitation
14 the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 and/or sell copies of the Software, and to permit persons to whom the
16 Software is furnished to do so, subject to the following conditions:
17
18 The above copyright notice and this permission notice shall be included in
19 all copies or substantial portions of the Software.
20
21 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27 DEALINGS IN THE SOFTWARE.
28
29 Note that the Qore library is released under a choice of three open-source
30 licenses: MIT (as above), LGPL 2+, or GPL 2+; see README-LICENSE for more
31 information.
32 */
33
34 #ifndef _QORE_QOREFILE_H
35
36 #define _QORE_QOREFILE_H
37
38 #include <qore/AbstractPrivateData.h>
39
40 #include <fcntl.h>
41 #include <string>
42 #include <sys/file.h>
43 #include <unistd.h>
44
45 /*
46 getchar from stdio.h(included via string on some platforms)
47 is allowed to be defined as a macro and this can cause
48 problems here since the getchar mentioned in this file might
49 get replaced, so we undefine it if it is defined.
50 Undefining getchar is safe since getchar must be defined as
51 a function, so the function is used if the macro is not available.
52 */
53 #ifdef getchar
54 #undef getchar
55 #endif
56
57 class QoreTermIOS;
58 class Queue;
59
61
66 class QoreFile {
67 protected:
69 struct qore_qf_private *priv;
70
72 DLLLOCAL QoreFile(const QoreFile&);
73
75 DLLLOCAL QoreFile& operator=(const QoreFile&);
76
77 public:
79 DLLEXPORT QoreFile(const QoreEncoding *cs = QCS_DEFAULT);
80
82 DLLEXPORT ~QoreFile();
83
85
94 DLLEXPORT int open(const char *fn, int flags = O_RDONLY, int mode = 0777, const QoreEncoding *cs = QCS_DEFAULT);
95
97
107 DLLEXPORT int open2(ExceptionSink *xsink, const char *fn, int flags = O_RDONLY, int mode = 0777, const QoreEncoding *cs = QCS_DEFAULT);
108
110
113 DLLEXPORT int close();
114
116 DLLEXPORT void setEncoding(const QoreEncoding *cs);
117
119 DLLEXPORT const QoreEncoding *getEncoding() const;
120
122 DLLEXPORT int sync();
123
125
132 DLLEXPORT QoreStringNode* readLine(ExceptionSink* xsink);
133
135
144 DLLEXPORT QoreStringNode* readLine(bool incl_eol, ExceptionSink* xsink);
145
147
155 DLLEXPORT int readLine(QoreString &str);
156
158
167 DLLEXPORT int readLine(QoreString &str, bool incl_eol);
168
170
180 DLLEXPORT QoreStringNode* readUntil(const char* bytes, bool incl_bytes, ExceptionSink* xsink);
181
183
193 DLLEXPORT int readUntil(char byte, QoreString& str, bool incl_bytes = true);
194
196
205 DLLEXPORT int readUntil(const char* bytes, QoreString& str, bool incl_bytes = true);
206
208
213 DLLEXPORT int write(const QoreString *str, ExceptionSink *xsink);
214
216
221 DLLEXPORT int write(const BinaryNode *b, ExceptionSink *xsink);
222
224
230 DLLEXPORT int write(const void *data, size_t len, ExceptionSink *xsink);
231
233
238 DLLEXPORT int writei1(char i, ExceptionSink *xsink);
239
241
247 DLLEXPORT int writei2(short i, ExceptionSink *xsink);
248
250
256 DLLEXPORT int writei4(int i, ExceptionSink *xsink);
257
259
265 DLLEXPORT int writei8(int64 i, ExceptionSink *xsink);
266
268
274 DLLEXPORT int writei2LSB(short i, ExceptionSink *xsink);
275
277
283 DLLEXPORT int writei4LSB(int i, ExceptionSink *xsink);
284
286
292 DLLEXPORT int writei8LSB(int64 i, ExceptionSink *xsink);
293
295
301 DLLEXPORT int readu1(unsigned char *val, ExceptionSink *xsink);
302
304
312 DLLEXPORT int readu2(unsigned short *val, ExceptionSink *xsink);
313
315
323 DLLEXPORT int readu4(unsigned int *val, ExceptionSink *xsink);
324
326
334 DLLEXPORT int readu2LSB(unsigned short *val, ExceptionSink *xsink);
335
337
345 DLLEXPORT int readu4LSB(unsigned int *val, ExceptionSink *xsink);
346
348
354 DLLEXPORT int readi1(char *val, ExceptionSink *xsink);
355
357
365 DLLEXPORT int readi2(short *val, ExceptionSink *xsink);
366
368
376 DLLEXPORT int readi4(int *val, ExceptionSink *xsink);
377
379
385 DLLEXPORT int readi8(int64 *val, ExceptionSink *xsink);
386
388
396 DLLEXPORT int readi2LSB(short *val, ExceptionSink *xsink);
397
399
407 DLLEXPORT int readi4LSB(int *val, ExceptionSink *xsink);
408
410
416 DLLEXPORT int readi8LSB(int64 *val, ExceptionSink *xsink);
417
419
429 DLLEXPORT QoreStringNode *read(qore_offset_t size, ExceptionSink *xsink);
430
432
443 DLLEXPORT QoreStringNode* read(qore_offset_t size, int timeout_ms, ExceptionSink *xsink);
444
446
453 DLLEXPORT int read(QoreString &str, qore_offset_t size, ExceptionSink *xsink);
454
456
462 DLLEXPORT BinaryNode *readBinary(qore_offset_t size, ExceptionSink *xsink);
463
465
471 DLLEXPORT int readBinary(BinaryNode &b, qore_offset_t size, ExceptionSink *xsink);
472
474
480 DLLEXPORT BinaryNode *readBinary(qore_offset_t size, int timeout_ms, ExceptionSink *xsink);
481
483
490 DLLEXPORT size_t read(void *ptr, size_t limit, int timeout_ms, ExceptionSink *xsink);
491
493
495 DLLEXPORT size_t setPos(size_t pos);
496
498
501 DLLEXPORT size_t getPos();
502
504
506 DLLEXPORT size_t getPos() const;
507
509
512 DLLEXPORT QoreStringNode *getchar();
513
515
520 DLLEXPORT QoreStringNode *getchar(ExceptionSink *xsink);
521
523 DLLEXPORT std::string getFileNameStr() const;
524
526 DLLEXPORT QoreStringNode* getFileName() const;
527
528 #ifndef _Q_WINDOWS
529 DLLEXPORT int chown(uid_t owner, gid_t group, ExceptionSink *xsink);
531
533 DLLEXPORT int lockBlocking(struct flock &fl, ExceptionSink *xsink);
534
536 DLLEXPORT int lock(const struct flock &fl, ExceptionSink *xsink);
537
539 DLLEXPORT int getLockInfo(struct flock &fl, ExceptionSink *xsink);
540 #endif
541
543
547 DLLEXPORT bool isDataAvailable(int timeout_ms, ExceptionSink *xsink) const;
548
550
553 DLLEXPORT QoreListNode *stat(ExceptionSink *xsink) const;
554
556
559 DLLEXPORT QoreHashNode *hstat(ExceptionSink *xsink) const;
560
562
565 DLLEXPORT QoreHashNode *statvfs(ExceptionSink *xsink) const;
566
568
570 DLLEXPORT int redirect(QoreFile& file, ExceptionSink* xsink);
571
573
576 DLLEXPORT int getFD() const;
577
579 DLLEXPORT bool isOpen() const;
580
582 DLLEXPORT bool isTty() const;
583
585
591 DLLEXPORT int detachFd();
592
594 DLLLOCAL int setTerminalAttributes(int action, QoreTermIOS *ios, ExceptionSink *xsink) const;
595
597 DLLLOCAL int getTerminalAttributes(QoreTermIOS *ios, ExceptionSink *xsink) const;
598
599 // NOTE: QoreFile::makeSpecial() can only be called right after the constructor (private API)
600 DLLLOCAL void makeSpecial(int sfd);
601
603 DLLLOCAL void setEventQueue(ExceptionSink* xsink, Queue* q, QoreValue arg, bool with_data);
604
606 DLLLOCAL void cleanup(ExceptionSink *xsink);
607 };
608
609 DLLEXPORT extern qore_classid_t CID_FILE;
610 DLLEXPORT extern QoreClass* QC_FILE;
611 DLLEXPORT extern QoreClass* QC_READONLYFILE;
612
613 class File : public AbstractPrivateData, public QoreFile {
614 protected:
615 DLLLOCAL virtual ~File();
616
617 public:
618 DLLLOCAL File(const QoreEncoding *cs);
619 DLLLOCAL virtual void deref(ExceptionSink *xsink);
620 DLLLOCAL virtual void deref();
621 };
622
623 class QoreFileHelper : QorePrivateObjectAccessHelper {
624 public:
625 DLLEXPORT QoreFileHelper(QoreObject* obj, ExceptionSink* xsink);
626 DLLEXPORT ~QoreFileHelper();
627 DLLEXPORT QoreFile* operator*() const;
628 DLLEXPORT QoreFile* operator->() const;
629 };
630
631 #endif // _QORE_QOREFILE_H
QoreFile::writei2LSB
DLLEXPORT int writei2LSB(short i, ExceptionSink *xsink)
writes 2-byte (16bit) binary integer data in LSB (Least Significant Byte first, little endian) format...
QoreFile::readi2LSB
DLLEXPORT int readi2LSB(short *val, ExceptionSink *xsink)
reads a 2-byte signed integer from the file in LSB (Least Significant Byte first, big endian) format ...
QoreFile::setTerminalAttributes
DLLLOCAL int setTerminalAttributes(int action, QoreTermIOS *ios, ExceptionSink *xsink) const
sets terminal attributes
QoreEncoding
defines string encoding functions in Qore
Definition: QoreEncoding.h:83
QoreFile::lock
DLLEXPORT int lock(const struct flock &fl, ExceptionSink *xsink)
perform a file lock operation, does not block
QoreFile::writei8LSB
DLLEXPORT int writei8LSB(int64 i, ExceptionSink *xsink)
writes 8-byte (64bit) binary integer data in LSB (Least Significant Byte first, little endian) format...
QoreFile::writei4LSB
DLLEXPORT int writei4LSB(int i, ExceptionSink *xsink)
writes 4-byte (32bit) binary integer data in LSB (Least Significant Byte first, little endian)format ...
QoreHashNode
This is the hash or associative list container type in Qore, dynamically allocated only...
Definition: QoreHashNode.h:50
QoreFile::readUntil
DLLEXPORT QoreStringNode * readUntil(const char *bytes, bool incl_bytes, ExceptionSink *xsink)
reads string data from the file up to and optionally including the terminating EOL characters passed ...
AbstractPrivateData
the base class for all data to be used as private data of Qore objects
Definition: AbstractPrivateData.h:44
QoreFile::operator=
DLLLOCAL QoreFile & operator=(const QoreFile &)
this function is not implemented; it is here as a private function in order to prohibit it from being...
QoreFile::writei1
DLLEXPORT int writei1(char i, ExceptionSink *xsink)
writes 1-byte binary integer data to the file and returns the number of bytes written (normally 1) ...
QCS_DEFAULT
DLLEXPORT const QoreEncoding * QCS_DEFAULT
the default encoding for the Qore library
QoreFile::readi4
DLLEXPORT int readi4(int *val, ExceptionSink *xsink)
reads a 4-byte signed integer from the file in MSB (Most Significant Byte first, big endian) format a...
QoreFile::writei2
DLLEXPORT int writei2(short i, ExceptionSink *xsink)
writes 2-byte (16bit) binary integer data in MSB (Most Significant Byte first, big endian) format to ...
QoreFile::readi8LSB
DLLEXPORT int readi8LSB(int64 *val, ExceptionSink *xsink)
reads an 8-byte signed integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter
QoreFile::QoreFile
DLLLOCAL QoreFile(const QoreFile &)
this function is not implemented; it is here as a private function in order to prohibit it from being...
QoreFile::chown
DLLEXPORT int chown(uid_t owner, gid_t group, ExceptionSink *xsink)
changes ownership of the file (if possible)
QoreFile::readu2
DLLEXPORT int readu2(unsigned short *val, ExceptionSink *xsink)
reads a 2-byte unsigned integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter
QoreFile::detachFd
DLLEXPORT int detachFd()
detaches and returns the file descriptor
QoreFile::redirect
DLLEXPORT int redirect(QoreFile &file, ExceptionSink *xsink)
redirects the current file (this) to the argument
QoreFile::readi4LSB
DLLEXPORT int readi4LSB(int *val, ExceptionSink *xsink)
reads a 4-byte signed integer from the file in LSB (Least Significant Byte first, big endian) format ...
QoreFile::getTerminalAttributes
DLLLOCAL int getTerminalAttributes(QoreTermIOS *ios, ExceptionSink *xsink) const
gets terminal attributes
QoreString
Qore&#39;s string type supported by the QoreEncoding class.
Definition: QoreString.h:81
QoreStringNode
Qore&#39;s string value type, reference counted, dynamically-allocated only.
Definition: QoreStringNode.h:50
QoreFile::setPos
DLLEXPORT size_t setPos(size_t pos)
sets the absolute file position to "pos"
QoreFile::isDataAvailable
DLLEXPORT bool isDataAvailable(int timeout_ms, ExceptionSink *xsink) const
returns true if data is available for the file descriptor
QoreFile::isTty
DLLEXPORT bool isTty() const
returns true if the file is a tty
QoreFile::readi1
DLLEXPORT int readi1(char *val, ExceptionSink *xsink)
reads a 1-byte signed integer from the file and returns the value read as an output parameter ...
QoreListNode
This is the list container type in Qore, dynamically allocated only, reference counted.
Definition: QoreListNode.h:52
QoreFile::setEncoding
DLLEXPORT void setEncoding(const QoreEncoding *cs)
sets the encoding for the file
QoreClass
defines a Qore-language class
Definition: QoreClass.h:239
QoreFile
provides controlled access to file data through Qore data structures
Definition: QoreFile.h:66
AbstractPrivateData::deref
virtual DLLLOCAL void deref()
decrements the reference count of the object without the possibility of throwing a Qore-language exce...
Definition: AbstractPrivateData.h:65
QoreFile::read
DLLEXPORT QoreStringNode * read(qore_offset_t size, ExceptionSink *xsink)
reads string data from the file and returns the string read (caller owns the reference count returned...
QoreFile::getFD
DLLEXPORT int getFD() const
get file descriptor
QoreFile::getPos
DLLEXPORT size_t getPos()
returns the absolute byte position in the file
QoreValue
The main value class in Qore, designed to be passed by value.
Definition: QoreValue.h:267
QoreFile::hstat
DLLEXPORT QoreHashNode * hstat(ExceptionSink *xsink) const
returns a QoreHashNode with file status information
QoreFile::getchar
DLLEXPORT QoreStringNode * getchar()
reads a single byte from the file and returns it as a new string, caller owns the reference count ret...
QoreObject
the implementation of Qore&#39;s object data type, reference counted, dynamically-allocated only ...
Definition: QoreObject.h:60
qore_classid_t
unsigned qore_classid_t
used for the unique class ID for QoreClass objects
Definition: common.h:79
QoreFile::writei8
DLLEXPORT int writei8(int64 i, ExceptionSink *xsink)
writes 8-byte (64bit) binary integer data in MSB (Most Significant Byte first, big endian) format to ...
ExceptionSink
container for holding Qore-language exception information and also for registering a "thread_exit" ca...
Definition: ExceptionSink.h:48
QoreFile::readu2LSB
DLLEXPORT int readu2LSB(unsigned short *val, ExceptionSink *xsink)
reads a 2-byte unsigned integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter
QoreFile::getEncoding
DLLEXPORT const QoreEncoding * getEncoding() const
returns the encoding used for the file
QoreFile::getFileNameStr
DLLEXPORT std::string getFileNameStr() const
returns the filename of the file being read as a std::string (the string is empty if no file name is ...
int64
long long int64
64bit integer type, cannot use int64_t here since it breaks the API on some 64-bit systems due to equ...
Definition: common.h:260
QoreFile::statvfs
DLLEXPORT QoreHashNode * statvfs(ExceptionSink *xsink) const
returns a QoreHashNode with filesystem status information
QoreFile::readu1
DLLEXPORT int readu1(unsigned char *val, ExceptionSink *xsink)
reads a 1-byte unsigned integer from the file and returns the value read as an output parameter ...
QoreFile::write
DLLEXPORT int write(const QoreString *str, ExceptionSink *xsink)
writes string data to the file, character encoding is converted if necessary, and returns the number ...
qore_offset_t
intptr_t qore_offset_t
used for offsets that could be negative
Definition: common.h:76
QoreFile::readLine
DLLEXPORT QoreStringNode * readLine(ExceptionSink *xsink)
reads string data from the file up to and including the terminating EOL characters (can be "\n"...
QoreFile::~QoreFile
DLLEXPORT ~QoreFile()
closes the file and frees all memory allocated to the object
QoreFile::readi2
DLLEXPORT int readi2(short *val, ExceptionSink *xsink)
reads a 2-byte signed integer from the file in MSB (Most Significant Byte first, big endian) format a...
QoreFile::priv
struct qore_qf_private * priv
private implementation
Definition: QoreFile.h:69
QoreFile::open2
DLLEXPORT int open2(ExceptionSink *xsink, const char *fn, int flags=O_RDONLY, int mode=0777, const QoreEncoding *cs=QCS_DEFAULT)
opens the file and raises a Qore-language exception if an error occurs
QoreFile::getLockInfo
DLLEXPORT int getLockInfo(struct flock &fl, ExceptionSink *xsink)
get lock info operation, does not block
QoreFile::lockBlocking
DLLEXPORT int lockBlocking(struct flock &fl, ExceptionSink *xsink)
perform a file lock operation
QoreFile::open
DLLEXPORT int open(const char *fn, int flags=O_RDONLY, int mode=0777, const QoreEncoding *cs=QCS_DEFAULT)
opens the file and returns 0 for success, non-zero for error
QoreFile::writei4
DLLEXPORT int writei4(int i, ExceptionSink *xsink)
writes 4-byte (32bit) binary integer data in MSB (Most Significant Byte first, big endian) format to ...
QoreFile::getFileName
DLLEXPORT QoreStringNode * getFileName() const
returns the filename of the file being read (NULL if no file name is set); caller owns the reference ...
QoreFile::sync
DLLEXPORT int sync()
flushes the write buffer to disk
QoreFile::close
DLLEXPORT int close()
closes the file
QoreFile::setEventQueue
DLLLOCAL void setEventQueue(ExceptionSink *xsink, Queue *q, QoreValue arg, bool with_data)
sets the event queue (not part of the library&#39;s pubilc API), must be already referenced before call ...
QoreFile::readu4
DLLEXPORT int readu4(unsigned int *val, ExceptionSink *xsink)
reads a 4-byte unsigned integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter
QoreFile::readu4LSB
DLLEXPORT int readu4LSB(unsigned int *val, ExceptionSink *xsink)
reads a 4-byte unsigned integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter
QoreFile::readi8
DLLEXPORT int readi8(int64 *val, ExceptionSink *xsink)
reads an 8-byte signed integer from the file in MSB (Most Significant Byte first, big endian) format ...
QoreFile::stat
DLLEXPORT QoreListNode * stat(ExceptionSink *xsink) const
returns a QoreListNode with file status information
QoreFile::isOpen
DLLEXPORT bool isOpen() const
returns true if the file is open, false if not
QoreFile::cleanup
DLLLOCAL void cleanup(ExceptionSink *xsink)
internal API, must be called before deleting the object if an event queue is set
BinaryNode
holds arbitrary binary data
Definition: BinaryNode.h:41
QoreFile::readBinary
DLLEXPORT BinaryNode * readBinary(qore_offset_t size, ExceptionSink *xsink)
reads binary data from the file and returns the data read (caller owns the reference count returned) ...