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Evgeny Gavrin
2015-06-26 20:05:36 +03:00
parent 9b2663a889
commit 772d72c073
6 changed files with 189 additions and 194 deletions
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05.dev-guide.md
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@@ -4,10 +4,7 @@ title: Development
permalink: /dev-guide/
---
The JerryScript Engine can be embedded into any application, providing way to run JavaScript in large range of environments - from desktops to low-memory microcontrollers.
* toc
{:toc}
JerryScript Engine can be embedded into any application, providing the way to run JavaScript in a large range of environments - from desktops to low-memory microcontrollers.
This guide is intended to introduce you to JerryScript embedding API through creation of simple JavaScript shell.
@@ -149,13 +146,13 @@ main (int argc, char * argv[]) {
}
{% endhighlight %}
The sample would also output 'Hello, World!'. However, now it is not just part of source script, but value, dynamically supplied to the engine.
The sample will also output 'Hello, World!'. However, now it is not just a part of the source script, but the value, dynamically supplied to the engine.
## Step 5. Description of JavaScript value descriptors
Structure, used to put values to / receive values from engine is the following:
Structure, used to put values to or receive values from the engine is the following:
- `type` of value:
- `type` of the value:
- JERRY_API_DATA_TYPE_UNDEFINED (undefined);
- JERRY_API_DATA_TYPE_NULL (null);
- JERRY_API_DATA_TYPE_BOOLEAN (true / false);
@@ -167,11 +164,11 @@ Structure, used to put values to / receive values from engine is the following:
- `v_string` (if JERRY_API_DATA_TYPE_STRING) - pointer to string;
- `v_object` (if JERRY_API_DATA_TYPE_OBJECT) - pointer to object.
Abstract values, to be sent to / received from engine are described with the structure.
Abstract values, to be sent to or received from the engine are described with the structure.
Pointers to strings / objects and values should be released just when become unnecessary, using `jerry_api_release_string` / `jerry_api_release_object` and `jerry_api_release_value`, correspondingly.
Pointers to strings or objects and values should be released just when become unnecessary, using `jerry_api_release_string` or `jerry_api_release_object` and `jerry_api_release_value`, correspondingly.
The following example function would output a JavaScript value:
The following example function will output a JavaScript value:
{% highlight cpp %}
static void
@@ -231,9 +228,9 @@ print_value (const jerry_api_value_t * value_p)
## Simple JavaScript shell
Now all build blocks, necessary to construct JavaScript shell, are ready.
Now all building blocks, necessary to construct JavaScript shell, are ready.
Shell operation can be described with following loop:
Shell operation can be described with the following loop:
- read command;
- if command is 'quit'