fix: 修正iconv库的API错误描述

close https://gitee.com/openLuat/LuatOS-Air8101/issues/IBHY9C

components/iconv/iconv.c

@@ -1,20 +1,3 @@
-/**************************************************************************
- *              Copyright (C), AirM2M Tech. Co., Ltd.
- *
- * Name:    iconv.c
- * Author:  liweiqiang
- * Version: V0.1
- * Date:    2013/7/15
- *
- * Description:
- *          字符编码转换
- **************************************************************************/
- /*
-@module  iconv
-@summary 字符编码转换
-@version V0.1
-@data    2021年12月13日
-*/
 
 #include <string.h>
 #include "iconv.h"
@@ -43,16 +26,6 @@ static const builtin_iconv_map iconv_map[] =
 /*-\NEW\liweiqiang\2013.7.19\增加utf8<->ucs2,ucs2be编码转换*/
 };
 
-/*
-打开相应字符编码转换函数
-@function iconv.open(tocode, fromcode) 
-@string tocode$目标编码格式$gb2312/ucs2/ucs2be/utf8
-@string fromcode$源编码格式$gb2312/ucs2/ucs2be/utf8
-@return table$cd$编码转换函数的转换句柄$ 
-@usage
---unicode大端编码 转化为 utf8编码
-local cd = iconv.open("utf8", "ucs2be")
-*/
 iconv_t iconv_open (const char * to_code, const char * from_code)
 {
     size_t i;
@@ -69,18 +42,7 @@ iconv_t iconv_open (const char * to_code, const char * from_code)
     return (iconv_t)-1;
 }
 
-/*
-字符编码转换
-@function cd:iconv(inbuf) 
-@string inbuf$输入字符串$例如:ucs2s 
-@return number$result$返回编码转换后的结果$0成功,-1失败
-@usage
---unicode大端编码 转化为 utf8编码
-function ucs2beToUtf8(ucs2s)
-    local cd = iconv.open("utf8", "ucs2be")
-    return cd:iconv(ucs2s)
-end
-*/
+
 size_t iconv_convert (iconv_t __cd, char ** __inbuf, size_t * __inbytesleft, char ** __outbuf, size_t * __outbytesleft)
 {
     builtin_iconv_map *_map_cd = (builtin_iconv_map *)__cd;
@@ -95,16 +57,7 @@ size_t iconv_convert (iconv_t __cd, char ** __inbuf, size_t * __inbytesleft, cha
     return _map_cd->fct(__inbuf, __inbytesleft, __outbuf, __outbytesleft);
 }
 
-/*
-关闭字符编码转换
-@function iconv.close(cd) 
-@string cd$iconv.open返回的句柄$ 
-@return  
-@usage
---关闭字符编码转换
-local cd = iconv.open("utf8", "ucs2be")
-iconv.close(cd)
-*/
+
 int iconv_close (iconv_t cd)
 {
     return 0;

components/iconv/luat_lib_iconv.c

@@ -99,7 +99,7 @@ static iconv_t get_iconv_t(lua_State *L, int i) {
 @return userdata 编码转换函数的转换句柄,若不存在会返回nil
 @usage
 --unicode大端编码 转化为 utf8编码
-local iconv = iconv.open("utf8", "ucs2be")
+local ic = iconv.open("utf8", "ucs2be")
 */
 static int Liconv_open(lua_State *L) {
     const char *tocode = luaL_checkstring(L, 1);
@@ -114,14 +114,14 @@ static int Liconv_open(lua_State *L) {
 
 /*
 字符编码转换
-@api iconv:iconv(inbuf)
+@api ic:iconv(inbuf)
 @string 释义：待转换字符串
 @return number 释义：返回编码转换后的结果<br>取值：0成功,-1失败
 @usage
 --unicode大端编码 转化为 utf8编码
 function ucs2beToUtf8(ucs2s)
-    local iconv = iconv.open("utf8", "ucs2be")
-    return iconv:iconv(ucs2s)
+    local ic = iconv.open("utf8", "ucs2be")
+    return ic:iconv(ucs2s)
 end
 */
 static int Liconv(lua_State *L) {
@@ -193,6 +193,16 @@ static int Liconvlist(lua_State *L) {
 
 #endif
 
+/*
+关闭字符编码转换
+@api iconv.close(cd) 
+@userdata iconv.open返回的句柄
+@return bool 成功返回true,否则返回false
+@usage
+--关闭字符编码转换
+local cd = iconv.open("utf8", "ucs2be")
+iconv.close(cd)
+*/
 static int Liconv_close(lua_State *L) {
     iconv_t cd = get_iconv_t(L, 1);
     if (iconv_close(cd) == 0)