The Ring programming language version 1.5.4 book - Part 37 of 185
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This document provides documentation on Ring classes for file handling, system functions, debugging, data types, conversions, ODBC, MySQL, and SQLite. For each class, it lists relevant methods and provides a brief description and example code demonstrating usage. It describes methods for reading, writing, renaming, and deleting files, executing system commands, raising exceptions, testing data types, converting between data types, connecting to and querying databases, and more. Examples show how to use each class and its methods to perform common tasks for file, system, and database operations in Ring.
![Ring Documentation, Release 1.5.4
see t[2] + nl
next
next
see copy("*",50) + nl
for x in aResult
see x["name"] + nl
next
close()
}
Output:
Test the sqlite Class Methods
1
Mahmoud
29
Jeddah
20000.0
2
Ahmed
27
Jeddah
15000.0
3
Mohammed
31
Egypt
20000.0
4
Ibrahim
24
Egypt
65000.0
**************************************************
Mahmoud
Ahmed
Mohammed
Ibrahim
43.18 Security Class
Methods:
Method Description/Output
md5(cString) Calculate the MD5 hash.
sha1(cString) Calculate the SHA1 hash.
sha256(cString) Calculate the SHA256 hash.
sha512(cString) Calculate the SHA512 hash.
sha384(cString) Calculate the SHA384 hash.
sha224(cString) Calculate the SHA224 hash.
encrypt(cString,cKey,cIV) Cncrypts the data using the Blowfish algorithm.
decrypt(cString,cKey,cIV) Decrypt the data encrypted using the Encrypt() method.
randbytes(nSize) Generate a string of pseudo-random bytes.
example:
43.18. Security Class 343](https://image.slidesharecdn.com/361ringfayedringdoc1-180426033403/85/The-Ring-programming-language-version-1-5-4-book-Part-37-of-185-9-320.jpg)
The Ring programming language version 1.5.4 book - Part 37 of 185
- 1. Ring Documentation, Release 1.5.4 02 02 244 08 53 AM 35 35 3 08/31/16 02:53:35 16 2016 Arab Standard Time % Month Name : August31/08/2016 10/09/2016 31/08/2016 10/09/2016 DiffDays = -10 DiffDays = 10 43.10 File Class Methods: 43.10. File Class 335
- 2. Ring Documentation, Release 1.5.4 Method Description/Output read(cFileName) Read the file content write(cFileName,cStr) Write string to file dir(cFolderPath) Get the folder contents (files & sub folders) rename(cOld,cNew) Rename files using the Rename() function remove(cFileName) Delete a file using the Remove() function open(cFileName,cMode) Open a file using the Fopen() function close() Close file flush() Flushes the output buffer of a stream reopen(cFileName,cMode) Open another file using the same file handle tempfile() Creates a temp. file (binary). seek(noffset,nwhence) Set the file position of the stream tell() Know the current file position of a stream rewind() Set the file position to the beginning of the file getpos() Get handle to the current file position setpos(poshandle) Set the current file position clearerr() Clear the EOF error and the error indicators of a stream eof() Test the end-of-file indicator error() Test the error indicator perror(cErrorMessage) Print error message to the stderr getc() Get the next character from the stream gets(nsize) Read new line from the stream putc(cchar) Write a character to the stream puts(cStr) Write a string to the stream ungetc(cchar) Push a character to the stream fread(nsize) Read data from a stream fwrite(cString) Write data to a stream exists(cFileName) Check if a file exists example: Load "stdlib.ring" ofile = new file See "Test the file Class Methods" + nl see ofile.read(filename()) see nl ofile.open(filename(),"r") see ofile.gets(100) + nl ofile.close() 43.11 System Class Methods: 43.11. System Class 336
- 3. Ring Documentation, Release 1.5.4 Method Description/Output system() Execute system commands sysget() Get environment variables ismsdos() Check if the operating system is MSDOS or not iswindows() Check if the operating system is Windows or not iswindows64() Check if the operating system is Windows 64bit or not isunix() Check if the operating system is Unix or not ismacosx() Check if the operating system is Mac OS X or not islinux() Check if the operating system is Linux or not isfreebsd() Check if the operating system is FreeBSD or not isandroid() Check if the operating system is Android or not windowsnl() Get the windows new line string sysargv() Get the command line arguments passed to the ring script filename() Get the active source file example: Load "stdlib.ring" oSystem = new System See "Test the System Class Methods" + nl oSystem.system("dir") see oSystem.sysget("path") + nl see oSystem.ismsdos() + nl see oSystem.iswindows() + nl see oSystem.iswindows64() + nl see oSystem.isunix() + nl see oSystem.ismacosx() + nl see oSystem.islinux() + nl see oSystem.isfreebsd() + nl see oSystem.isandroid() + nl see oSystem.windowsnl() + nl see oSystem.sysargv() + nl see oSystem.filename() + nl 43.12 Debug Class Methods: Method Description/Output eval(cCode) Execute code during the runtime from string. raise(cError) Raise an exception. assert(cCondition) Test condition before executing the code. example: Load "stdlib.ring" oDebug = new Debug See "Test the Debug Class Methods" + nl oDebug.eval("see 'Hello'+nl") try x = 10 oDebug.assert(x=11) 43.12. Debug Class 337
- 4. Ring Documentation, Release 1.5.4 catch see "assert" + nl done raise("Error!") 43.13 DataType Class Methods: Method Description/Output isstring(vValue) We can know if the value is a string or not. isnumber(vValue) We can know if the value is a number or not. islist(vValue) We can know if the value is a list or not. type(vValue) Know the type of a value isnull(vValue) Check the value to know if it’s null or not. isalnum(vValue) 1 if the value is digit/letter or 0 if not isalpha(vValue) 1 if the value is a letter or 0 if not iscntrl(vValue) 1 if the value is a control character (no printing position) isdigit(vValue) 1 if the value is a digit or 0 if not isgraph(vValue) 1 if the value can be printed (Except space) or 0 if not islower(vValue) 1 if the value is lowercase letter or 0 if not isprint(vValue) 1 if the value occupies a printing position or 0 if not ispunct(vValue) 1 if the value is a punctuation character or 0 if not isspace(vValue) 1 if the value is a white-space or 0 if not isupper(vValue) 1 if the value is an uppercase alphabetic letter or 0 if not isxdigit(vValue) 1 if the value is a hexdecimal digit character or 0 if not example: Load "stdlib.ring" oDataType = new DataType See "Test the DataType Class Methods" + nl see oDataType.isstring("test") + nl see oDataType.isnumber(1) + nl see oDataType.islist(1:3) + nl see oDataType.type("test") + nl see oDataType.isnull(null) + nl see oDataType.isalnum("Hello") + nl + # print 1 oDataType.isalnum("123456") + nl + # print 1 oDataType.isalnum("ABCabc123") + nl + # print 1 oDataType.isalnum("How are you") + nl # print 0 because of spaces see oDataType.isalpha("Hello") + nl + # print 1 oDataType.isalpha("123456") + nl + # print 0 oDataType.isalpha("ABCabc123") + nl + # print 0 oDataType.isalpha("How are you") + nl # print 0 See oDataType.iscntrl("hello") + nl + # print 0 oDataType.iscntrl(nl) # print 1 see oDataType.isdigit("0123456789") + nl + # print 1 oDataType.isdigit("0123a") + nl see oDataType.isgraph("abcdef") + nl + # print 1 oDataType.isgraph("abc def") + nl # print 0 see oDataType.islower("abcDEF") + nl + # print 0 oDataType.islower("ghi") + nl # print 1 see oDataType.isprint("Hello") + nl + # print 1 oDataType.isprint("Nice to see you") + nl + # print 1 oDataType.isprint(nl) + nl # print 0 43.13. DataType Class 338
- 5. Ring Documentation, Release 1.5.4 see oDataType.isprint("Hello") + nl # print 1 see oDataType.isupper("welcome") + nl + # print 0 oDataType.isupper("WELCOME") + nl # print 1 see oDataType.isxdigit("0123456789abcdef") + nl + # print 1 oDataType.isxdigit("123z") # print 0 Output: Test the DataType Class Methods 1 1 1 STRING 1 1 1 1 0 1 0 0 0 0 11 0 1 0 0 1 1 1 0 1 0 1 1 0 43.14 Conversion Class Methods: Method Description/Output number(vValue) Convert strings to numbers. string(vValue) Convert numbers to strings. ascii(vValue) Get the ASCII code for a letter. char(vValue) Convert the ASCII code to character. hex(vValue) Convert decimal to hexadecimal. dec(vValue) Convert hexadecimal to decimal. str2hex(vValue) Convert string characters to hexadecimal characters. hex2str(vValue) Convert hexadecimal characters to string. example: Load "stdlib.ring" 43.14. Conversion Class 339
- 6. Ring Documentation, Release 1.5.4 oConversion = new conversion See "Test the conversion Class Methods" + nl See oConversion.number("3") + 5 + nl See oConversion.string(3) + "5" + nl See oConversion.Ascii("m") + nl See oConversion.char(77) + nl see oConversion.hex(162) + nl see oConversion.dec("a2") + nl cHex = oConversion.str2hex("Hello") see cHex + nl see oConversion.hex2str(cHex) + nl Output: Test the conversion Class Methods 8 35 109 M a2 162 48656c6c6f Hello 43.15 ODBC Class Methods: Method Description/Output drivers() Get a list of ODBC drivers. datasources() Get a list of ODBC data sources. close() Free resources. connect(cConString) Connect to the database. disconnect() Close the connection. execute(cSQL) Execute SQL Statements colcount() Get columns count in the query result fetch() Fetch a row from the query result getdata(nCol) Get column value from the fetched row tables() Get a list of tables inside the database columns(cTableName) Get a list of columns inside the table autocommit(lStatus) Enable or disable the auto commit feature commit() Commit updates to the database rollback() Rollback updates to the database example: Load "stdlib.ring" oodbc = new odbc See "Test the odbc Class Methods" + nl oODBC { see drivers() see datasources() See "Connect to database" + nl see connect("DBQ=test.mdb;Driver={Microsoft Access Driver (*.mdb)}") + nl See "Select data" + nl 43.15. ODBC Class 340
- 7. Ring Documentation, Release 1.5.4 see execute("select * from person") + nl nMax = colcount() See "Columns Count : " + nMax + nl while fetch() See "Row data:" + nl for x = 1 to nMax see getdata(x) + " - " next end See "Close database..." + nl disconnect() close() } 43.16 MySQL Class Methods: Method Description/Output info() Return string contains the MySQL Client version. error() Get the error message from the MySQL Client. connect(cServer,cUser,cPass,cDatabase) Connect to the MySQL database server. close() Close the connection to the MySQL database. query(cQuery) Execute SQL queries. insert_id() Get the inserted row id. result() Get the query result (data without column names). next_result() Move to the next query result. columns() Get a list of columns names. result2() Get all of the column names then the query result in one list. escape_string(cStr) Before storing binary data and special characters in the database. autocommit(lStatus) Enable or disable the auto commit feature. commit() Commit updates to the database. rollback() Rollback updates to the database. example: Load "stdlib.ring" omysql = new mysql See "Test the MySQL Class Methods" + nl omysql { see info() + nl connect("localhost", "root", "root","mahdb") see "Execute Query" + nl query("SELECT * FROM Employee") see "Print Result" + nl see result2() see "Close database" + nl close() } Output: Test the MySQL Class Methods 5.5.30 43.16. MySQL Class 341
- 8. Ring Documentation, Release 1.5.4 Execute Query Print Result Id Name Salary 1 Mahmoud 15000 2 Samir 16000 3 Fayed 17000 Close database 43.17 SQLite Class Methods: Method Description/Output open(cDatabase) Open Database. close() Close Database. errormessage() Get Error Message. execute(cSQL) Execute Query. example: Load "stdlib.ring" osqlite = new sqlite See "Test the sqlite Class Methods" + nl osqlite { open("test.db") sql = "CREATE TABLE COMPANY(" + "ID INT PRIMARY KEY NOT NULL," + "NAME TEXT NOT NULL," + "AGE INT NOT NULL," + "ADDRESS CHAR(50)," + "SALARY REAL );" execute(sql) sql = "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) " + "VALUES (1, 'Mahmoud', 29, 'Jeddah', 20000.00 ); " + "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) " + "VALUES (2, 'Ahmed', 27, 'Jeddah', 15000.00 ); " + "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)" + "VALUES (3, 'Mohammed', 31, 'Egypt', 20000.00 );" + "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)" + "VALUES (4, 'Ibrahim', 24, 'Egypt ', 65000.00 );" execute(sql) aResult = execute("select * from COMPANY") for x in aResult for t in x 43.17. SQLite Class 342
- 9. Ring Documentation, Release 1.5.4 see t[2] + nl next next see copy("*",50) + nl for x in aResult see x["name"] + nl next close() } Output: Test the sqlite Class Methods 1 Mahmoud 29 Jeddah 20000.0 2 Ahmed 27 Jeddah 15000.0 3 Mohammed 31 Egypt 20000.0 4 Ibrahim 24 Egypt 65000.0 ************************************************** Mahmoud Ahmed Mohammed Ibrahim 43.18 Security Class Methods: Method Description/Output md5(cString) Calculate the MD5 hash. sha1(cString) Calculate the SHA1 hash. sha256(cString) Calculate the SHA256 hash. sha512(cString) Calculate the SHA512 hash. sha384(cString) Calculate the SHA384 hash. sha224(cString) Calculate the SHA224 hash. encrypt(cString,cKey,cIV) Cncrypts the data using the Blowfish algorithm. decrypt(cString,cKey,cIV) Decrypt the data encrypted using the Encrypt() method. randbytes(nSize) Generate a string of pseudo-random bytes. example: 43.18. Security Class 343
- 10. Ring Documentation, Release 1.5.4 Load "stdlib.ring" osecuirty = new secuirty See "Test the secuirty Class Methods" + nl oSecuirty { see md5("hello") + nl + sha1("hello") + nl + sha256("hello") + nl + sha512("hello") + nl + sha384("hello") + nl + sha256("hello") + nl list = 0:15 cKey="" for x in list cKey += char(x) next list = 1:8 cIV = "" for x in list cIV += char(x) next cCipher = encrypt("hello",cKey,cIV) see cCipher + nl + decrypt(cCipher,cKey,cIV) + nl } 43.19 Internet Class Methods: • download(cURL) • sendemail(cSMTPServer,cEmail,cPassword,cSender,cReceiver,cCC,cTitle,cContent) example: Load "stdlib.ring" ointernet = new internet See "Test the internet Class Methods" + nl ointernet { see download("www.ring-lang.sf.net") } 43.19. Internet Class 344