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Extension Modules / Script BASIC JavaScript Extension Module (Linux)
« Last post by support on October 18, 2017, 10:25:25 PM »
The Script BASIC JS extension module for Linux is based on the Cesanta's V7 JavaScript Engine. It claims to be the world's smallest footprint JavaScript 5.1 compatible embeddable engine. There are no other dependencies required.

JavaScript Programmers Guide

V7 JavaScript Documentation

Features:
  • Dynamically create JavaScript code in Script BASIC and execute the script.,
  • Call JavaScript functions and access variables from Script BASIC
  • Create / change JavaScript object properties and methods from Script BASIC
  • and much more ...

Note: The \ character is used by Script BASIC as a string escape character and must be inserted in the JavaScript code to make the \ just text. Loading JavaScript code from a file doesn't have the escape character issue and can be run verbatim.

js.inc
Code: Script BASIC
  1. MODULE JS
  2.  
  3. ' CORE
  4. DECLARE SUB      js_create                  ALIAS "js_create"                 LIB "js"
  5. DECLARE SUB      js_destroy                 ALIAS "js_destroy"                LIB "js"
  6. DECLARE SUB      js_get_global              ALIAS "js_get_global"             LIB "js"
  7. DECLARE SUB      js_get_this                ALIAS "js_get_this"               LIB "js"
  8. DECLARE SUB      js_get_arguments           ALIAS "js_get_arguments"          LIB "js"
  9. DECLARE SUB      js_arg                     ALIAS "js_arg"                    LIB "js"
  10. DECLARE SUB      js_argc                    ALIAS "js_argc"                   LIB "js"
  11. DECLARE SUB      js_own                     ALIAS "js_own"                    LIB "js"
  12. DECLARE SUB      js_disown                  ALIAS "js_disown"                 LIB "js"
  13. DECLARE SUB      js_set_gc_enabled          ALIAS "js_set_gc_enabled"         LIB "js"
  14. DECLARE SUB      js_interrupt               ALIAS "js_interrupt"              LIB "js"
  15. DECLARE SUB      js_get_parser_error        ALIAS "js_get_parser_error"       LIB "js"
  16.  
  17. ' PRIMITIVES
  18. DECLARE SUB      js_mk_number               ALIAS "js_mk_number"              LIB "js"
  19. DECLARE SUB      js_get_double              ALIAS "js_get_double"             LIB "js"
  20. DECLARE SUB      js_get_int                 ALIAS "js_get_int"                LIB "js"
  21. DECLARE SUB      js_is_number               ALIAS "js_is_number"              LIB "js"
  22. DECLARE SUB      js_mk_boolean              ALIAS "js_mk_boolean"             LIB "js"
  23. DECLARE SUB      js_get_bool                ALIAS "js_get_bool"               LIB "js"
  24. DECLARE SUB      js_is_boolean              ALIAS "js_is_boolean"             LIB "js"
  25. DECLARE SUB      js_mk_null                 ALIAS "js_mk_null"                LIB "js"
  26. DECLARE SUB      js_is_null                 ALIAS "js_is_null"                LIB "js"
  27. DECLARE SUB      js_mk_undefined            ALIAS "js_mk_undefined"           LIB "js"
  28. DECLARE SUB      js_is_undefined            ALIAS "js_is_undefined"           LIB "js"
  29. DECLARE SUB      js_mk_foreign              ALIAS "js_mk_foreign"             LIB "js"
  30. DECLARE SUB      js_get_ptr                 ALIAS "js_get_ptr"                LIB "js"
  31. DECLARE SUB      js_is_foreign              ALIAS "js_is_foreign"             LIB "js"
  32.  
  33. ' STRINGS
  34. DECLARE SUB      js_mk_string               ALIAS "js_mk_string"              LIB "js"
  35. DECLARE SUB      js_is_string               ALIAS "js_is_string"              LIB "js"
  36. DECLARE SUB      js_get_string              ALIAS "js_get_string"             LIB "js"
  37. DECLARE SUB      js_get_cstring             ALIAS "js_get_cstring"            LIB "js"
  38.  
  39. ' OBJECTS
  40. DECLARE SUB      js_mk_object               ALIAS "js_mk_object"              LIB "js"
  41. DECLARE SUB      js_is_object               ALIAS "js_is_object"              LIB "js"
  42. DECLARE SUB      js_get_proto               ALIAS "js_get_proto"              LIB "js"
  43. DECLARE SUB      js_set_proto               ALIAS "js_set_proto"              LIB "js"
  44. DECLARE SUB      js_get                     ALIAS "js_get"                    LIB "js"
  45. DECLARE SUB      js_def                     ALIAS "js_def"                    LIB "js"
  46. DECLARE SUB      js_set                     ALIAS "js_set"                    LIB "js"
  47. DECLARE SUB      js_del                     ALIAS "js_del"                    LIB "js"
  48. DECLARE SUB      js_init_prop_iter_ctx      ALIAS "js_init_prop_iter_ctx"     LIB "js"
  49. DECLARE SUB      js_next_prop               ALIAS "js_next_prop"              LIB "js"
  50. DECLARE SUB      js_destruct_prop_iter_ctx  ALIAS "js_destruct_prop_iter_ctx" LIB "js"
  51. DECLARE SUB      js_is_instanceof           ALIAS "js_is_instanceof"          LIB "js"
  52. DECLARE SUB      js_is_instanceof_v         ALIAS "js_is_instanceof_v"        LIB "js"
  53.  
  54. ' ARRAYS
  55. DECLARE SUB      js_mk_array                ALIAS "js_mk_array"               LIB "js"
  56. DECLARE SUB      js_is_array                ALIAS "js_is_array"               LIB "js"
  57. DECLARE SUB      js_array_length            ALIAS "js_array_length"           LIB "js"
  58. DECLARE SUB      js_array_push              ALIAS "js_array_push"             LIB "js"
  59. DECLARE SUB      js_array_get               ALIAS "js_array_get"              LIB "js"
  60. DECLARE SUB      js_array_set               ALIAS "js_array_set"              LIB "js"
  61. DECLARE SUB      js_array_del               ALIAS "js_array_del"              LIB "js"
  62.  
  63. ' EXECUTION
  64. DECLARE SUB      js_exec                    ALIAS "js_exec"                   LIB "js"
  65. DECLARE SUB      js_exec_file               ALIAS "js_exec_file"              LIB "js"
  66. DECLARE SUB      js_apply                   ALIAS "js_apply"                  LIB "js"
  67. DECLARE SUB      js_parse_json              ALIAS "js_parse_json"             LIB "js"
  68. DECLARE SUB      js_parse_json_file         ALIAS "js_parse_json_file"        LIB "js"
  69.  
  70. 'REGEX
  71. DECLARE SUB      js_mk_regexp               ALIAS "js_mk_regexp"              LIB "js"
  72. DECLARE SUB      js_is_regexp               ALIAS "js_is_regexp"              LIB "js"
  73.  
  74. ' UTILITY
  75. DECLARE SUB      js_stringify               ALIAS "js_stringify"              LIB "js"
  76. DECLARE SUB      js_println                 ALIAS "js_println"                LIB "js"
  77.  
  78. DECLARE SUB      SB_shifts                  ALIAS "SB_shifts"                 LIB "js"
  79. DECLARE COMMAND  js_iif                     ALIAS "js_iif"                    LIB "js"
  80.  
  81.  
  82. ' JS Global Module Variables
  83. OBJ = 0
  84. SYS = 0
  85.  
  86. ' Stringify Modes
  87. DEFAULT = 0
  88. JSON    = 1
  89. DEBUG   = 2
  90.  
  91. ' Property Attribute Support
  92.  
  93. CONST V7_PROPERTY_NON_WRITABLE              = 1
  94. CONST V7_PROPERTY_NON_ENUMERABLE            = 2
  95. CONST V7_PROPERTY_NON_CONFIGURABLE          = 4
  96. CONST V7_PROPERTY_GETTER                    = 8
  97. CONST V7_PROPERTY_SETTER                    = 16
  98. CONST _V7_PROPERTY_HIDDEN                   = 32
  99. CONST _V7_PROPERTY_OFF_HEAP                 = 64
  100. CONST _V7_PROPERTY_USER_DATA_AND_DESTRUCTOR = 128
  101. CONST _V7_DESC_PRESERVE_VALUE               = 256
  102. CONST _V7_DESC_MASK                         = &HFFFF
  103.  
  104. CONST PROPERTY_DEFAULT = 0
  105.  
  106. ' TRUE or FALSE. Whether the property's value can be set.
  107. FUNCTION WRITABLE(v)
  108.   IF v THEN
  109.     WRITABLE = PROPERTY_DEFAULT
  110.   ELSE
  111.     WRITABLE = V7_PROPERTY_NON_WRITABLE
  112.   END IF
  113. END FUNCTION
  114.  
  115. ' TRUE or FALSE. Whether the property shows in some loop constructs.
  116. FUNCTION ENUMERABLE(v)
  117.   IF v THEN
  118.     ENUMERABLE = PROPERTY_DEFAULT
  119.   ELSE
  120.     ENUMERABLE = V7_PROPERTY_NON_ENUMERABLE
  121.   END IF
  122. END FUNCTION
  123.  
  124. ' TRUE or FALSE. Whether the property can be deleted and whether its attributes can be changed.
  125. FUNCTION CONFIGURABLE(v)
  126.   IF v THEN
  127.     CONFIGURABLE = PROPERTY_DEFAULT
  128.   ELSE
  129.     CONFIGURABLE = V7_PROPERTY_NON_CONFIGURABLE
  130.   END IF
  131. END FUNCTION
  132.  
  133. ' TRUE or FALSE. When a property is accessed the value is generated by calling a function implicitly.
  134. FUNCTION GETTER(v)
  135.   IF v THEN
  136.     GETTER = V7_PROPERTY_GETTER
  137.   ELSE
  138.     GETTER = FALSE
  139.   END IF
  140. END FUNCTION
  141.  
  142. ' TRUE or FALSE. When a property is set it will implicitly call a function and pass a
  143. ' value as argument, and the return value of the function is set to the property.
  144. FUNCTION SETTER(v)
  145.   IF v THEN
  146.     SETTER = V7_PROPERTY_SETTER
  147.   ELSE
  148.     SETTER = FALSE
  149.   END IF
  150. END FUNCTION
  151.  
  152. FUNCTION PRESERVE_VALUE
  153.     PRESERVE_VALUE = _V7_DESC_PRESERVE_VALUE
  154. END FUNCTION
  155.  
  156. FUNCTION HIDDEN(v)
  157.   IF v THEN
  158.     HIDDEN = V7_PROPERTY_HIDDEN
  159.   ELSE
  160.     HIDDEN = FALSE
  161.   END IF
  162. END FUNCTION
  163.  
  164. FUNCTION OFF_HEAP(v)
  165.   IF v THEN
  166.     OFF_HEAP = _V7_PROPERTY_OFF_HEAP
  167.   ELSE
  168.     OFF_HEAP = FALSE
  169.   END IF
  170. END FUNCTION
  171.  
  172.  
  173. ' JS API Function Wrappers
  174.  
  175. ' Create V7 instance
  176. FUNCTION CREATE
  177.   OBJ = js_create()
  178.   SYS = js_get_global(OBJ)
  179.   CREATE = OBJ
  180. END FUNCTION
  181.  
  182. ' Destroy V7 instance
  183. SUB DESTROY
  184.   js_destroy(OBJ)
  185.   UNDEF OBJ
  186. END SUB
  187.  
  188. ' Return root level (`global`) object of the given V7 instance
  189. FUNCTION GET_GLOBAL
  190.   GET_GLOBAL = js_get_global(OBJ)
  191. END FUNCTION
  192.  
  193. ' Return current `this` object
  194. FUNCTION GET_THIS
  195.   GET_THIS = js_get_this(OBJ)
  196. END FUNCTION
  197.  
  198. ' Return current `arguments` array
  199. FUNCTION GET_ARGUMENTS
  200.   GET_ARGUMENTS = js_get_arguments(OBJ)
  201. END FUNCTION
  202.  
  203. ' Return i-th argument
  204. FUNCTION ARG(i)
  205.   ARG = js_arg(OBJ, i)
  206. END FUNCTION
  207.  
  208. ' Return the length (`count`) of `arguments`
  209. FUNCTION ARGC
  210.   ARGC = js_argc(OBJ)
  211. END FUNCTION
  212.  
  213. ' Tells the GC about a JS value variable/field owned by `C` code.
  214. SUB OWN(v)
  215.   js_own(OBJ, v)
  216. END SUB
  217.  
  218. ' User code should also explicitly disown the variables with v7_disown
  219. ' once it goes out of scope or the structure containing the v7_val_t field is freed.
  220. ' Returns 1 if value is found, 0 otherwise
  221. FUNCTION DISOWN(v)
  222.   DISOWN = js_disown(OBJ, v)
  223. END FUNCTION
  224.  
  225. ' Enable or disable GC
  226. SUB SET_GC_ENABLED(enabled)
  227.   js_set_gc_enabled(OBJ, enabled)
  228. END SUB
  229.  
  230. ' It sets a flag that will cause the interpreter to throw an Interrupted Error
  231. SUB INTERRUPT
  232.   js_interrupt(OBJ)
  233. END SUB
  234.  
  235. ' Returns last parser error message
  236. FUNCTION GET_ERROR
  237.   GET_ERROR = js_get_parser_error(OBJ)
  238. END FUNCTION
  239.  
  240. ' Make numeric primitive value
  241. FUNCTION MK_NUMBER(num)
  242.   MK_NUMBER = js_mk_number(OBJ, num)
  243. END FUNCTION
  244.  
  245. ' Returns number value stored in `v7_val_t` as `double`
  246. FUNCTION GET_DOUBLE(v)
  247.   GET_DOUBLE = js_get_double(OBJ, v)
  248. END FUNCTION
  249.  
  250. ' Returns number value stored in `v7_val_t` as `int`. If the number
  251. ' value is not an integer, the fraction part will be discarded.
  252. FUNCTION GET_INT(v)
  253.   GET_INT = js_get_int(OBJ, v)
  254. END FUNCTION
  255.  
  256. ' Returns true if given value is a primitive number value
  257. FUNCTION IS_NUMBER(v)
  258.   IS_NUMBER = js_is_number(v)
  259. END FUNCTION
  260.  
  261. ' Make boolean primitive value (either `true` or `false`)
  262. FUNCTION MK_BOOLEAN(is_true)
  263.   MK_BOOLEAN = js_mk_boolean(OBJ, is_true)
  264. END FUNCTION
  265.  
  266. ' Returns boolean stored in `v7_val_t`: 0 for `false` or
  267. ' non-boolean, non-0 for `true`
  268. FUNCTION GET_BOOL(v)
  269.   GET_BOOL = js_get_bool(OBJ, v)
  270. END FUNCTION
  271.  
  272. ' Returns `true` if given value is a primitive boolean value
  273. FUNCTION IS_BOOLEAN(v)
  274.   IS_BOOLEAN = js_is_boolean(v)
  275. END FUNCTION
  276.  
  277. ' Make `null` primitive value
  278. FUNCTION MK_NULL
  279.   MK_NULL = js_mk_null()
  280. END FUNCTION
  281.  
  282. ' Returns true if given value is a primitive `null` value
  283. FUNCTION IS_NULL(v)
  284.   IS_NULL = js_is_null(v)
  285. END FUNCTION
  286.  
  287. ' Make `undefined` primitive value
  288. FUNCTION MK_UNDEFINED
  289.   MK_UNDEFINED = js_mk_undefined()
  290. END FUNCTION
  291.  
  292. ' Returns true if given value is a primitive `undefined` value
  293. FUNCTION IS_UNDEFINED(v)
  294.   IS_UNDEFINED = js_is_undefined(v)
  295. END FUNCTION
  296.  
  297. ' Make JavaScript value that holds C/C++ `void *` pointer
  298. FUNCTION MK_FOREIGN
  299.   MK_FOREIGN = js_mk_foreign(OBJ)
  300. END FUNCTION
  301.  
  302. ' Returns `void *` pointer stored in `v7_val_t`
  303. ' Returns NULL `undef` if the value is not a foreign pointer
  304. FUNCTION GET_PTR(v)
  305.   GET_PTR = js_get_ptr(OBJ, v)
  306. END FUNCTION
  307.  
  308. ' Returns true if given value holds `void *` pointer
  309. FUNCTION IS_FOREIGN(v)
  310.   IS_FOREIGN = js_is_foreign(v)
  311. END FUNCTION
  312.  
  313. ' Creates a string primitive value
  314. FUNCTION MK_STRING(strval)
  315.   MK_STRING = js_mk_string(OBJ, strval, LEN(strval), 1)
  316. END FUNCTION
  317.  
  318. ' Returns true if given value is a primitive string value
  319. FUNCTION IS_STRING(v)
  320.   IS_STRING = js_is_string(v)
  321. END FUNCTION
  322.  
  323. ' Returns a pointer to the string stored in `v7_val_t`
  324. FUNCTION GET_STRING(v)
  325.   GET_STRING = js_get_string(OBJ, v)
  326. END FUNCTION
  327.  
  328. ' Returns a pointer to the string stored in `v7_val_t`
  329. ' Returns NULL `undef` if the value is not a string or
  330. ' if the string is not compatible with a C string
  331. FUNCTION GET_CSTRING(v)
  332.   GET_CSTRING = js_get_cstring(OBJ, v)
  333. END FUNCTION
  334.  
  335. ' Make an empty object
  336. FUNCTION MK_OBJECT
  337.   MK_OBJECT = js_mk_object(OBJ)
  338. END FUNCTION
  339.  
  340. ' Returns true if the given value is an object or function
  341. FUNCTION IS_OBJECT(v)
  342.   IS_OBJECT = js_is_object(v)
  343. END FUNCTION
  344.  
  345. ' Get object's prototype.
  346. FUNCTION GET_PROTO(object)
  347.   GET_PROTO = js_get_proto(OBJ, object)
  348. END FUNCTION
  349.  
  350. ' Set object's prototype. Return old prototype or undefined on error
  351. FUNCTION SET_PROTO(object, proto)
  352.   SET_PROTO = js_set_proto(OBJ, object, proto)
  353. END FUNCTION
  354.  
  355. ' Lookup property `name` in object `obj`. If `obj` holds no such property,
  356. ' an `undefined` value is returned
  357. FUNCTION GETS(object, objname)
  358.   GETS = js_get(OBJ, object, objname, LEN(objname))
  359. END FUNCTION
  360.  
  361. ' Define object property, similar to JavaScript `Object.defineProperty()`
  362. FUNCTION DEF(object, objname, attr, value)
  363.   DEF = js_def(OBJ, object, objname, LEN(objname), attr, value)
  364. END FUNCTION
  365.  
  366. ' Set object property. Behaves just like JavaScript assignment
  367. FUNCTION SETS(object, objname, value)
  368.   SETS = js_set(OBJ, object, objname, LEN(objname), value)
  369. END FUNCTION
  370.  
  371. ' Delete own property `name` of the object `obj`
  372. ' Does not follow the prototype chain
  373. FUNCTION DEL(object, objname)
  374.   DEL = js_del(OBJ, object, objname, LEN(objname))
  375. END FUNCTION
  376.  
  377. ' Returns true if the object is an instance of a given constructor / class name
  378. FUNCTION IS_INSTANCEOF(object, classname)
  379.   IS_INSTANCEOF = js_is_instanceof(OBJ, object, classname)
  380. END FUNCTION
  381.  
  382. ' Returns true if the object is an instance of a given constructor object class
  383. FUNCTION IS_INSTANCEOF_V(object, objclass)
  384.   IS_INSTANCEOF_V = js_is_instanceof_v(OBJ, object, objclass)
  385. END FUNCTION
  386.  
  387. ' Custom multi-property `GET` function
  388. FUNCTION GET_PROPERTIES(object, proparray)
  389.   LOCAL objname, value, attr, propcnt
  390.   objname = ""
  391.   value = 0
  392.   attr = 0
  393.   propcnt = 1
  394.  ' UNDEF proparray
  395.  js_init_prop_iter_ctx(OBJ, object)
  396.   WHILE js_next_prop(OBJ, objname, value, attr) <> undef
  397.     proparray[propcnt, 0] = js_get_string(OBJ, objname)
  398.     proparray[propcnt, 1] = js_get_int(OBJ, value)
  399.     proparray[propcnt, 2] = attr
  400.     propcnt += 1
  401.   WEND
  402.   js_destruct_prop_iter_ctx(OBJ)
  403.   GET_PROPERTIES = propcnt - 1
  404. END FUNCTION
  405.  
  406. ' Make an empty array object
  407. FUNCTION MK_ARRAY
  408.   MK_ARRAY = js_mk_array(OBJ)
  409. END FUNCTION
  410.  
  411. ' Returns true if given value is an array object
  412. FUNCTION IS_ARRAY(object)
  413.   IS_ARRAY = js_is_array(OBJ, object)
  414. END FUNCTION
  415.  
  416. ' Returns length on an array. If `object` is not an array, 0 is returned
  417. FUNCTION ARRAY_LENGTH(object)
  418.   ARRAY_LENGTH = js_array_length(OBJ, object)
  419. END FUNCTION
  420.  
  421. ' Insert `value` in `object` at the end of the array
  422. FUNCTION ARRAY_PUSH(object, value)
  423.   ARRAY_PUSH = js_array_push(OBJ, object, value)
  424. END FUNCTION
  425.  
  426. '  Return array member at index `index`. If `index` is out of bounds, undefined is returned
  427. FUNCTION ARRAY_GET(object, index)
  428.   ARRAY_GET = js_array_get(OBJ, object, index)
  429. END FUNCTION
  430.  
  431. ' Insert value `v` into `arr` at 'index`
  432. FUNCTION ARRAY_SET(object, index, value)
  433.   ARRAY_SET = js_array_set(OBJ, object, index, value)
  434. END FUNCTION
  435.  
  436. ' Delete value in array `arr` at index `index`, if it exists
  437. SUB ARRAY_DEL(object, index)
  438.    js_array_del(OBJ, object, index)
  439. END SUB
  440.  
  441. ' Execute JavaScript `js_code`
  442. ' The result of evaluation is stored in the `return` variable
  443. ' The 'ok' argument will contain the function's execution success status flag
  444. FUNCTION EXEC(code, ok)
  445.   EXEC = js_exec(OBJ, code, ok)
  446. END FUNCTION
  447.  
  448. ' Same as `v7_exec()`, but loads source code from `path` file
  449. FUNCTION EXEC_FILE(codepath, ok)
  450.   EXEC_FILE = js_exec_file(OBJ, codepath, ok)
  451. END FUNCTION
  452.  
  453. ' Parse `json_code`
  454. ' The result of evaluation is stored in the `return` variable
  455. ' The 'ok' argument will contain the function's parse success status flag
  456. FUNCTION PARSE_JSON(json_code, ok)
  457.   PARSE_JSON = js_parse_json(OBJ, json_code, ok)
  458. END FUNCTION
  459.  
  460. ' Same as `v7_parse_json()`, but loads `json_code` from `path` file
  461. FUNCTION PARSE_JSON_FILE(json_code_file, ok)
  462.   PARSE_JSON_FILE = js_parse_json_file(OBJ, json_code_file, ok)
  463. END FUNCTION
  464.  
  465. ' Call function `func` with arguments `args`, using `object` as `this`
  466. ' `args` should be an array containing arguments or `undefined`
  467. FUNCTION APPLY(func, object, args)
  468.   APPLY = js_apply(OBJ, func, object, args)
  469. END FUNCTION
  470.  
  471. ' Make RegExp object. For example, `regex` is `(.+)`, `flags` is `gi`.
  472. FUNCTION MK_REGEXP(regex, flags, rcode)
  473.   MK_REGEXP = js_mk_regexp(OBJ, regex, LEN(regex), flags, LEN(flags), rcode)
  474. END FUNCTION
  475.  
  476. ' Returns true if given value is a JavaScript RegExp object
  477. FUNCTION IS_REGEXP(object)
  478.   IS_REGEXP = js_is_regexp(OBJ, object)
  479. END FUNCTION
  480.  
  481. ' Generate string representation of the JavaScript value
  482. FUNCTION STRINGIFY(object, convtype)
  483.   STRINGIFY = js_stringify(OBJ, object, convtype)
  484. END FUNCTION
  485.  
  486. ' Output a string representation of the value to stdout followed by a newline
  487. SUB PRINTIFY(object)
  488.   js_println(OBJ, object)
  489. END SUB
  490.  
  491.  
  492. END MODULE
  493.  


Hello JavaScript
Code: Script BASIC
  1. IMPORT js.inc
  2.  
  3. JS::CREATE
  4. PRINT JS::GET_INT(JS::EXEC("1 + 1")),"\n"
  5. JS::DESTROY
  6.  


jrs@jrs-laptop:~/sb/examples/js$ time scriba js_hello2.sb
2

real   0m0.026s
user   0m0.016s
sys   0m0.008s
jrs@jrs-laptop:~/sb/examples/js$


Fibonacci
Code: Script BASIC
  1. IMPORT js.inc
  2.  
  3. jscode = """
  4. function fibonacci(n) {
  5.  if (n <= 2) {
  6.    return 1;
  7.  } else {
  8.    return fibonacci(n - 1) + fibonacci(n - 2);
  9.  }
  10. }
  11.  
  12. print(fibonacci(24));
  13. """
  14.  
  15. JS::CREATE
  16. JS::EXEC(jscode)
  17. JS::DESTROY
  18.  


jrs@jrs-laptop:~/sb/examples/js$ scriba js_fibonacci.sb
46368
jrs@jrs-laptop:~/sb/examples/js$


Create object, property and attributes
Code: Script BASIC
  1. IMPORT js.inc
  2.  
  3. JS::CREATE
  4. myobj = JS::MK_OBJECT()
  5. JS::DEF(myobj, "test", 0, JS::MK_NUMBER(64))
  6. JS::SETS(myobj, "test", JS::MK_NUMBER(32))
  7. JS::DEF(myobj, "test", JS::WRITABLE(FALSE) OR JS::PRESERVE_VALUE(),JS::MK_NULL())
  8. JS::SETS(myobj, "test", JS::MK_NUMBER(16))
  9. PRINT "test = ",JS::GET_INT(JS::GETS(myobj, "test")),"\n"
  10. JS::DESTROY
  11.  


jrs@jrs-laptop:~/sb/examples/js$ scriba js_deftest.sb
test = 32
jrs@jrs-laptop:~/sb/examples/js$


Load .js file and get properties
Code: Script BASIC
  1. IMPORT js.inc
  2.  
  3. JS::CREATE
  4. JS::EXEC_FILE "properties.js"
  5. propcnt = JS::GET_PROPERTIES(JS::GETS(JS::SYS,"test"), proparray)
  6. PRINT "Property\tValue\tAttribute\n"
  7. FOR i = 1 to propcnt
  8.   PRINT proparray[i,0],"\t\t",proparray[i,1],"\t",proparray[i,2],"\n"
  9. NEXT
  10. JS::DESTROY
  11.  

properties.js
Code: Javascript
  1. var test = {};
  2.  
  3. Object.defineProperty(test, 'a', {
  4.   value: 1,
  5.   writable: true,
  6.   enumerable: true,
  7.   configurable: true
  8. });
  9.  
  10. Object.defineProperty(test, 'b', {
  11.   value: 2,
  12.   writable: false,
  13.   enumerable: false,
  14.   configurable: false
  15. });
  16.  


jrs@jrs-laptop:~/sb/examples/js$ scriba js_propfile.sb
Property   Value   Attribute
b      2   7
a      1   0
jrs@jrs-laptop:~/sb/examples/js$


Call JavaScript function
Code: Script BASIC
  1. IMPORT js.inc
  2.  
  3. jscode = """
  4. var sum = function(a, b, c) {
  5.  print (c);
  6.  return a + b; };
  7. """
  8.  
  9. JS::CREATE()
  10. JS::EXEC(jscode)
  11. func = JS::GETS(JS::SYS, "sum")
  12. args = JS::MK_ARRAY()
  13. JS::ARRAY_PUSH(args, JS::MK_NUMBER(123.0))
  14. JS::ARRAY_PUSH(args, JS::MK_NUMBER(0.456))
  15. JS::ARRAY_PUSH(args, JS::MK_STRING("Script BASIC"))
  16. result = JS::APPLY(func, 0, args, rcode)
  17. PRINT FORMAT("Result: %g\n", JS::GET_DOUBLE(result))
  18. JS::DESTROY
  19.  


jrs@jrs-laptop:~/sb/examples/js$ scriba js_callfunc.sb
Script BASIC
Result: 123.456
jrs@jrs-laptop:~/sb/examples/js$


Describe Properties with JavaScript
Code: Script BASIC
  1. IMPORT js.inc
  2.  
  3. ' Create JavaScript instance
  4. JS::CREATE
  5.  
  6. ' Create JavaScript object
  7. JS::EXEC("var myobj = {};")
  8. myobj = JS::GETS(JS::SYS, "myobj")
  9.  
  10. ' Create object property
  11. JS::DEF(myobj, "test", JS::WRITABLE(TRUE), JS::MK_NUMBER(64))
  12.  
  13. ' Describe object properties with JavaScript
  14. jscode = """
  15. var descriptors = {};
  16.  
  17. Object.keys(myobj).forEach(function(key) {
  18.    descriptors[key] = Object.getOwnPropertyDescriptor(myobj, key);
  19. });
  20.  
  21. var objdesc = JSON.stringify(descriptors);
  22. """
  23. JS::EXEC(jscode)
  24.  
  25. ' Return JSON formatted result string
  26. PRINT JS::GET_STRING(JS::GETS(JS::SYS, "objdesc")),"\n"
  27.  
  28. ' Release JavaScript instance
  29. JS::DESTROY
  30.  


jrs@jrs-laptop:~/sb/examples/js$ scriba js_defobj.sb
{"test":{"configurable":true,"enumerable":true,"writable":true,"value":64}}
jrs@jrs-laptop:~/sb/examples/js$


JSON / Stringify
Code: Script BASIC
  1. IMPORT js.inc
  2.  
  3. JS::CREATE
  4. myobj = JS::MK_OBJECT()
  5. JS::DEF(myobj, "myprop_1", 0, JS::MK_NUMBER(64))
  6. JS::DEF(myobj, "myprop_2", 0, JS::MK_NUMBER(1.23))
  7. JS::DEF(myobj, "myprop_3", 0, JS::MK_STRING("JavaScript"))
  8. PRINT JS::STRINGIFY(myobj, JS::JSON),"\n"
  9. JS::DESTROY
  10.  


jrs@jrs-laptop:~/sb/examples/js$ scriba js_stringify.sb
{"myprop_3":"JavaScript","myprop_2":1.23,"myprop_1":64}
jrs@jrs-laptop:~/sb/examples/js$


JavaScript Regular Expression
Code: Script BASIC
  1. IMPORT js.inc
  2.  
  3. jscode = """
  4. var output = ['---------- Original String\\n', names + '\\n'];
  5.  
  6. // Prepare two regular expression patterns and array storage.
  7. // Split the string into array elements.
  8.  
  9. // pattern: possible white space then semicolon then possible white space
  10. var pattern = /\\s*;\\s*/;
  11.  
  12. // Break the string into pieces separated by the pattern above and
  13. // store the pieces in an array called nameList
  14. var nameList = names.split(pattern);
  15.  
  16. // new pattern: one or more characters then spaces then characters.
  17. // Use parentheses to "memorize" portions of the pattern.
  18. // The memorized portions are referred to later.
  19. pattern = /(\\w+)\\s+(\\w+)/;
  20.  
  21. // New array for holding names being processed.
  22. var bySurnameList = [];
  23.  
  24. // Display the name array and populate the new array
  25. // with comma-separated names, last first.
  26. //
  27. // The replace method removes anything matching the pattern
  28. // and replaces it with the memorized string—second memorized portion
  29. // followed by comma space followed by first memorized portion.
  30. //
  31. // The variables $1 and $2 refer to the portions
  32. // memorized while matching the pattern.
  33.  
  34. output.push('---------- After Split by Regular Expression');
  35.  
  36. var i, len;
  37. for (i = 0, len = nameList.length; i < len; i++) {
  38.  output.push(nameList[i]);
  39.  bySurnameList[i] = nameList[i].replace(pattern, '$2, $1');
  40. }
  41.  
  42. // Display the new array.
  43. output.push('---------- Names Reversed');
  44. for (i = 0, len = bySurnameList.length; i < len; i++) {
  45.  output.push(bySurnameList[i]);
  46. }
  47.  
  48. // Sort by last name, then display the sorted array.
  49. bySurnameList.sort();
  50. output.push('---------- Sorted');
  51. for (i = 0, len = bySurnameList.length; i < len; i++) {
  52.  output.push(bySurnameList[i]);
  53. }
  54.  
  55. output.push('---------- End');
  56.  
  57. var retstr = output.join('\\n');
  58. """
  59.  
  60. ' The name string contains multiple spaces and tabs,
  61. ' and may have multiple spaces between first and last names.
  62.  
  63. JS::CREATE
  64. JS::EXEC("var names = 'Harry Trump ;Fred Barney; Helen Rigby ; Bill Abel ; Chris Hand ';")
  65. JS::EXEC(jscode)
  66. PRINT JS::GET_STRING(JS::GETS(JS::SYS, "retstr"))
  67. JS::DESTROY
  68.  


jrs@jrs-laptop:~/sb/examples/js$ time scriba js_regexp.sb
---------- Original String

Harry Trump ;Fred Barney; Helen Rigby ; Bill Abel ; Chris Hand

---------- After Split by Regular Expression
Harry Trump
Fred Barney
Helen Rigby
Bill Abel
Chris Hand
---------- Names Reversed
Trump, Harry
Barney, Fred
Rigby, Helen
Abel, Bill
Hand, Chris
---------- Sorted
Abel, Bill
Barney, Fred
Hand, Chris
Rigby, Helen
Trump, Harry
---------- End
real   0m0.030s
user   0m0.028s
sys   0m0.000s
jrs@jrs-laptop:~/sb/examples/js$

2
MySQL / Re: Module MySQL Overview
« Last post by Script_test on July 24, 2017, 06:08:12 AM »
Thanks, you've been a great help.
3
MySQL / Re: Module MySQL Overview
« Last post by support on July 07, 2017, 10:34:20 AM »
I'm not sure but sending the port number as a string may be causing a problem.

My guess is at this point you're getting a CR_CONN_HOST_ERROR  response error message.

Update

My guess was correct and not passing the port number as a string allowed me to connect to your remote MySQL server with the Script BASIC extension module.

Code: Script BASIC
  1. include mysql.bas
  2. dbh =  mysql::RealConnect("sql8.freemysqlhosting.net","sql8183953","N9yUkvribn","sql8183953",3306)
  3. PRINT "Host info is: ",mysql::GetHostInfo(dbh),"\n"
  4.  


jrs@jrs-laptop:~/sb/examples/test$ scriba mysql_remote.sb
Host info is: sql8.freemysqlhosting.net via TCP/IP
jrs@jrs-laptop:~/sb/examples/test$


Here is an example of querying the MySQL information_schema tables.

Code: Script BASIC
  1. IMPORT mysql.bas
  2. dbh =  mysql::RealConnect("sql8.freemysqlhosting.net","sql8183953","N9yUkvribn","sql8183953",3306)
  3. mysql::query(dbh,"SELECT * FROM INFORMATION_SCHEMA.TABLES")
  4. WHILE mysql::FetchHash(dbh,tbls)
  5.   FOR x = 0 TO UBOUND(tbls) STEP 2
  6.     PRINT tbls[x]," - ",tbls[x+1],"\n"
  7.   NEXT
  8.   PRINTNL
  9. WEND
  10. mysql::Close(dbh)
  11.  
4
MySQL / Re: Module MySQL Overview
« Last post by Script_test on July 07, 2017, 12:49:56 AM »
I can connect without problems with the command > mysql -u
To test, I have created a database in a free hosting.
Code: [Select]
include mysql.bas
dbh =  mysql::RealConnect("sql8.freemysqlhosting.net","sql8183953","N9yUkvribn","sql8183953","3306")
PRINT "Host info is: ",mysql::GetHostInfo(dbh),"\n"

Code: [Select]
mysql -u sql8183953 -h sql8.freemysqlhosting.net -p

5
MySQL / Re: Module MySQL Overview
« Last post by support on July 06, 2017, 11:08:16 AM »
Many MySQL servers don't allow external connections due to abuse and resource utilization trying to access it by brute force.

I would try accessing the server with Excel / ODBC just to make sure you have access rights, If all is good there, we can dig a little deeper why the SB extension module is returning an extension error.
6
MySQL / Re: Module MySQL Overview
« Last post by Script_test on July 06, 2017, 07:03:05 AM »
 
Code: [Select]
mysql::RealConnect(host,user,password,database [,port])

Does it work on non-local connections?
I am trying on different external mysql servers and only receive error.
Code: [Select]
(0): error 0x00080002:Extension specific error: %s
Ty
7
SQLite / Re: SQLite3 SB ext. module
« Last post by Script_test on June 29, 2017, 03:37:12 AM »
 :)
Thank you!!
8
SQLite / Re: SQLite3 SB ext. module
« Last post by AlyssonR on June 29, 2017, 03:07:49 AM »
Try this:

Code: [Select]
directo="c:\\scriptbasic\\database\\"
fileno="registro_fechas.db"
hdb=sqlite::open(directo & fileno)

or even

Code: [Select]
directo="c:\\scriptbasic\\database\\"
fileno="registro_fechas.db"
ofile = directo & fileno
hdb=sqlite::open(ofile)

Sometimes, it pays to keep arguments free of literal strings.
9
SQLite / Re: SQLite3 SB ext. module
« Last post by Script_test on June 28, 2017, 07:34:01 AM »
Hello!
First of all, thank you for your work.
I have Strange random problem running under windows 7 and windows 10.
When the file is created, it adds additional ascii characters to the file name.
thanks for your help.

update
This happens when you use ...

Code: [Select]
directo="c:\\scriptbasic\\database\\"
hdb=sqlite::open(directo & "registro_fechas.db")
10
General Discussions / Re: help: upload files to FTP using cURL
« Last post by support on June 08, 2017, 07:24:36 PM »
Would SYSTEM be a better choice?
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