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Remplaced char* by char[]

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Benoit Blanchon
2014-02-27 13:59:06 +01:00
parent c844db8659
commit 8c2a1fab72
2 changed files with 6 additions and 6 deletions
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2
CHANGELOG.md
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@ -4,7 +4,7 @@ ArduinoJsonParser change log
v1.1 (unreleased)
----
* Example: changed `char* json` into `char[] json` so that the byes are not write protected
* Example: changed `char* json` into `char json[]` so that the byes are not write protected
* Fixed parsing bug when the JSON contains multi-dimensional arrays
v1.0

10
README.md
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@ -21,7 +21,7 @@ Features
Example
-------
char* json = "{\"Name\":\"Blanchon\",\"Skills\":[\"C\",\"C++\",\"C#\"],\"Age\":32,\"Online\":true}";
char json[] = "{\"Name\":\"Blanchon\",\"Skills\":[\"C\",\"C++\",\"C#\"],\"Age\":32,\"Online\":true}";
JsonParser<32> parser;
@ -66,7 +66,7 @@ To extract data from the JSON string, you need to create a `JsonParser`, and spe
> #### How to choose the number of tokens ?
> A token is an element of the JSON object: either a key, a value, an hash-table or an array.
> As an example the `char* json` on the top of this page contains 12 tokens (don't forget to count 1 for the whole object and 1 more for the array itself).
> As an example the `char json[]` on the top of this page contains 12 tokens (don't forget to count 1 for the whole object and 1 more for the array itself).
> The more tokens you allocate, the more complex the JSON can be, but also the more memory is occupied.
> Each token takes 8 bytes, so `sizeof(JsonParser<32>)` is 256 bytes which is quite big in an Arduino with only 2KB of RAM.
@ -85,7 +85,7 @@ If you need other type, you can get the string value and parse it yourself.
#### Hash-table
Consider we have a `char* json` pointing to the following JSON string:
Consider we have a `char json[]` containing to the following JSON string:
{
"Name":"Blanchon",
@ -120,7 +120,7 @@ And then extract the member you need:
#### Array
Consider we have a `char* json` pointing to the following JSON string:
Consider we have a `char json[]` containing to the following JSON string:
[
[ 1.2, 3.4 ],
@ -196,7 +196,7 @@ because the local variable `parser` will be *removed* from memory when the funct
This will probably never be an issue, but you need to be aware of this feature.
When you pass a `char*` to `JsonParser::parseArray()` or `JsonParser::parseHashTable()`, the content of the string will be altered to add `\0` at the end of the tokens.
When you pass a `char[]` to `JsonParser::parseArray()` or `JsonParser::parseHashTable()`, the content of the string will be altered to add `\0` at the end of the tokens.
This is because we want functions like `JsonArray::getString()` to return a null-terminating string without any memory allocation.