BugID:17707347: add base64,chip_code,cjson,digest_algorithm,hashtable…

…,zlib,libc README.md and Config.in

Change-Id: Ia03b36778d3ab16b1dbe5387a640ca37eeb17f72

utility/Config.in

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+source "utility/base64/Config.in"
+source "utility/chip_code/Config.in"
+source "utility/cjson/Config.in"
+source "utility/digest_algorithm/Config.in"
+source "utility/libc/Config.in"
+source "utility/log/Config.in"
+source "utility/zlib/Config.in"

utility/README.md

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+## Contents
+
+*(source code, in tree view, list major entries if too many)*
+
+```
+udata/
+├── README.md
+├── abs_data_model/
+├── cali_data/
+├── include
+│   ├── abs_data_model.h
+│   ├── aos/
+│   ├── ...
+│   └── uData_queue.h
+├── service/
+├── service_mgr/
+├── ucube.py
+├── udata.mk
+├── ...
+└── udata_service_task.c
+```
+
+## Introduction
+
+*(In brief word, introduce WHAT is it and WHAT does it do.)*
+
+### Features
+
+*(list features)*
+
+* Feature 1, description 1
+* Feature 2, description 2
+* Feature 3, description 3
+
+### Dependencies
+
+*(list component dependencies)*
+
+* component 1
+* component 2
+
+## API
+
+*(list exported APIs)*
+
+### krhino_task_create
+```
+kstat_t krhino_task_create(ktask_t *task, const name_t *name, void *arg, uint8_t prio, tick_t ticks, cpu_stack_t *stack_buf, size_t stack_size, task_entry_t entry, uint8_t autorun)
+```
+
+*(description of this api, if needed)*
+
+#### Arguments
+| name | type |description |
+| --- | --- | --- |
+| task | ktask_t| |
+| name_t |const name_t| |
+| arg |void| |
+| prio |uint8_t| |
+| tick |tick_t| |
+| stack_buf |cpu_stack_t| |
+| stack_size |size_t| |
+| entry |task_entry_t| |
+
+##### Return
+
+`ktask_t task`
+|return|description|
+|---| --- |
+| task | task handle |
+| -1| fail |
+
+### krhino_task_sleep
+
+### krhino_task_del
+
+### krhino_task_find
+
+## Reference
+
+*(external links, resources, pictures, etc.)*

utility/base64/Config.in

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+config AOS_COMP_BASE64
+    bool "base64"
+    default n

utility/base64/README.md

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+## Introduction
+
+**Base64** is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation.
+
+**Base64** encoding schemes are commonly used when there is a need to encode binary data that needs to be stored and transferred over media that are designed to deal with textual data.
+
+### Features
+
+The **Base64** component provides 2 APIs to encode & decode data:
+* [base64_encode()](#base64_encode)
+* [base64_decode()](#base64_decode)
+
+### Dependencies
+
+*(none)*
+
+## APIs
+
+### base64_encode()
+
+`base64_encode()` used to encode data to base64 format.
+
+```c
+unsigned char *base64_encode(const unsigned char *input, int input_len,
+                             unsigned char *output, int *output_len);
+```
+
+##### Arguments
+
+| name        | type                   |description              |
+|:------------|:-----------------------|-------------------------|
+| `input`     | `const unsigned char *`| the data need to encode |
+| `input_len` | `int`                  | input data len          |
+| `output`    | `unsigned char *`      | already encoded data    |
+| `input_len` | `int *`                | encoded data len        |
+
+
+##### Return
+
+|return             |description             |
+|:------------------| ---------------------- |
+| `unsigned char *` | address of output data |
+| `NULL`            | something error        |
+
+##### sample code
+
+```c
+unsigned char input[] = "AliOS-Things";
+unsigned char *output;
+int output_len;
+
+base64_encode(input, strlen(input), output, &output_len);
+```
+
+You can use linux command: `base64` to test the `base64_encode()` result:
+
+```sh
+$ echo "AliOS-Things" | base64
+QWxpT1MtVGhpbmdzCg==
+```
+
+### base64_decode()
+
+`base64_decode()` use to decode base64 format data to normal data.
+
+```c
+unsigned char *base64_decode(const unsigned char *input, int input_len,
+                             unsigned char *output, int *output_len)
+```
+
+##### Arguments
+
+| name        | type                   |description              |
+|:------------|:-----------------------|-------------------------|
+| `input`     | `const unsigned char *`| the data need to decode |
+| `input_len` | `int`                  | input data len          |
+| `output`    | `unsigned char *`      | already decoded data    |
+| `input_len` | `int *`                | decoded data len        |
+
+##### Return
+
+|return             |description              |
+|:------------------|-------------------------|
+| `unsigned char *` | address of decoded data |
+| `NULL`            | something error         |
+
+
+##### sample code
+```c
+unsigned char input[] = "QWxpT1MtVGhpbmdzCg==";
+unsigned char *output;
+int output_len;
+
+base64_decode(input, strlen(input), output, &output_len);
+```
+
+you can use linux command: `base64` to test the `base64_decode()` result:
+
+```sh
+$ echo "QWxpT1MtVGhpbmdzCg==" | base64 -d
+AliOS-Things
+```
+
+## Reference
+
+* [base64 Wikipedia](https://en.wikipedia.org/wiki/Base64)
+* [base64 decode/encode online](https://www.base64decode.org/)

utility/chip_code/Config.in

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+config AOS_COMP_CHIPCODE
+    bool "chip_code"
+    default n

utility/chip_code/README.md

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+## Introduction
+
+**chip_code** provides app or other component an api([get_chip_code()](#get_chip_code)) to get chip_code by chip name.
+
+### Features
+
+chip_code data struct including `vendor`, `id`, `mcu_family_name`, and defined as this:
+
+```c
+typedef struct __chip_code {
+    UINT16  vendor;
+    UINT16  id;
+    const char  *mcu_family_name;
+} chip_code_st;
+```
+
+* `vendor` list can be found by enum **CHIP_VENDOR** in `chip_code.h`.
+* `id` list can be found by enum **CHIP_ID** in `chip_code.h`.
+* `mcu_family_name` must be same with `HOST_MCU_FAMILY`(defined by the build system).
+
+all the already defined chip_code can be found by the variable **g_chip_codes** in `chip_code.c`.
+
+### Dependencies
+
+*(None)*
+
+## APIs
+
+### get_chip_code()
+
+```c
+chip_code_st *get_chip_code( char *name);
+```
+
+##### Arguments
+
+| name        | type    |description    |
+|:------------|:--------|---------------|
+| `name`      | `char *`| the chip name |
+
+##### Return
+
+|return            |description            |
+|:-----------------| ----------------------|
+| `chip_code_st *` | address of found chip |
+| `NULL`           | find nothing          |

utility/cjson/Config.in

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+config AOS_COMP_CJSON
+    bool "cjson"
+    default n

utility/digest_algorithm/Config.in

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+config AOS_COMP_DIGEST_ALGORITHM
+    bool "digest_algorithm"
+    default n