Add some functions, and change a feature.

1. Update doccomments in reiconv.hpp.in.
2. Add function 'int iconv_string(const iconv_t& cd, const char *start, const char *end, char **resultp, size_t *lengthp)'
3. Add function 'int iconv_string(int tocode_cp, int fromcode_cp, const char* start, const char* end, char** resultp, size_t* lengthp, bool strict=true)'
4. Update function 'encode' definion.
5. Fix some warnings in Clang.
6. Change the 'autodetect' feature of 'iconv_string' to a non extra feature.

	修改：     ChangeLog
	修改：     NEWS.md
	修改：     README.md
	修改：     include/cppp/reiconv.hpp.in
	修改：     lib/hkscs2001.h
	修改：     lib/hkscs2008.h
	修改：     lib/iconv.cpp

Author: ChenPi11

ChangeLog

@@ -1,3 +1,13 @@
+2023-09-09  ChenPi11  <wushengwuxi-msctinoulk@outlook.com>
+
+	Version 2.1.0 compile failed (release failed).
+	Update doccomments in reiconv.hpp.in.
+	Add function 'int iconv_string(const iconv_t& cd, const char *start, const char *end, char **resultp, size_t *lengthp)'
+	Add function 'int iconv_string(int tocode_cp, int fromcode_cp, const char* start, const char* end, char** resultp, size_t* lengthp, bool strict=true)'
+	Update function 'encode' definion.
+	Fix some warnings in Clang.
+	Change the 'autodetect' feature of 'iconv_string' to a non extra feature.
+
 2023-09-02  ChenPi11  <wushengwuxi-msctinoulk@outlook.com>
 
 	Optimize 'iconv_open(int, int)'.

NEWS.md

@@ -1,11 +1,15 @@
 New in 2.1.0:
 * Add a new function `iconv_t iconv_open(int tocode_cp, int fromcode_cp, bool strict = true);` and codepage definitions.
+* Add new function `int iconv_string(const iconv_t& cd, const char *start, const char *end, char **resultp, size_t *lengthp)`
+* Add new function `int iconv_string(int tocode_cp, int fromcode_cp, const char* start, const char* end, char** resultp, size_t* lengthp, bool strict=true)`
+* Update function 'encode' definion.
 * Add CTest on Windows support.
 * Remove 'iconv_allocation_t';
 * Fully remove wchar support.
 * Fix some bugs.
 * Add header comments NLS support.
 * Add Doxygen comments for 'cppp/reiconv.hpp'.
+* Change the 'autodetect' feature of 'iconv_string' to a non extra feature.
 
 New in 2.0.0:
 * Redist 'GNU LIBICONV' to 'cppp-reiconv'.

README.md

@@ -117,8 +117,7 @@ cmake --build . --config=Release
 cmake --install .
 ```
 
-When use full build, extra encodings and features will be enabled.
-iconv string will suport autodetect input encoding.
+When use full build, extra encodings will be enabled.
 
 + Build with test suite
 ```shell

include/cppp/reiconv.hpp.in

@@ -1,7 +1,7 @@
 /**
  * @file cppp/reiconv.hpp
  * @author ChenPi11
- * @brief C++ Plus base definitions
+ * @brief C++ Plus cppp-reiconv package.
  * @version 2.1.0
  * @date 2023-7-28
  * @copyright Copyright (C) 1999-2023 Free Software Foundation, Inc.
@@ -28,14 +28,14 @@
 #ifndef _CPPP_REICONV_HPP
 #define _CPPP_REICONV_HPP
 
-#ifdef _MSC_VER
+#if _MSC_VER >= 1600 
 /* Use UTF-8 to decode this file. */
 #pragma execution_character_set("utf-8")
 #endif
 
-#include <errno.h>
 #include <exception>
 #include <iostream>
+#include <errno.h>
 #include <time.h>
 #include <vector>
 #include <wchar.h>
@@ -216,7 +216,20 @@ extern "C++"
                                           void *data);
 
     /**
-     * @brief Converts an entire string from one encoding to another, using iconv. Easier to use than iconv() itself,
+     * @brief Converts an entire string from one encoding to another, using iconv. Easier to use than iconv() itself.
+     * @note This function does not treat zero characters specially.
+     * @param cd Conversion descriptor.
+     * @param start Source string start pointer.
+     * @param end Source string end pointer.
+     * @param resultp Result memory pointer.
+     * @param lengthp Pointer to a variable that stores the length of the result.
+     * @return Return 0 if successful, otherwise return errno and errno set. Particular errno values are EILSEQ and ENOMEM.
+     */
+    extern @DLL_VARIABLE@ int iconv_string(const iconv_t& cd, const char *start,
+                                            const char *end, char **resultp, size_t *lengthp);
+    
+    /**
+     * @brief Converts an entire string from one encoding to another,
      * and supports autodetect encodings on input when extra features enabled.
      *
      * @note Converts a memory region given in encoding FROMCODE to a new memory
@@ -231,25 +244,47 @@ extern "C++"
      * *resultp; malloc/realloc is used to allocate the result.
      *
      * @note This function does not treat zero characters specially.
-     *
      * @param tocode Target encoding.
      * @param fromcode From encoding.
      * @param start Source string start pointer.
      * @param end Source string end pointer.
      * @param resultp Result memory pointer.
      * @param lengthp Pointer to a variable that stores the length of the result.
-     * @return Return 0 if successful, otherwise -1 and errno set. Particular errno values: EILSEQ and ENOMEM.
+     * @return Return 0 if successful, otherwise return errno and errno set. Particular errno values: EILSEQ and ENOMEM.
      *
      * @example
      *   const char* s = ...;
      *   char* result = NULL;
      *   if (iconv_string("UCS-4-INTERNAL", "GBK",
-     *                    s, s+strlen(s)+1, &result, NULL) < 0)
+     *                    s, s+strlen(s)+1, &result, NULL) != 0)
      *   perror("iconv_string");
      *
      */
-    extern @DLL_VARIABLE@ int iconv_string(const char *tocode, const char *fromcode, const char *start,
-                                            const char *end, char **resultp, size_t *lengthp);
+    extern @DLL_VARIABLE@ int iconv_string(const char* tocode, const char* fromcode, const char* start,
+                                            const char* end, char** resultp, size_t* lengthp);
+
+    /**
+     * @brief Converts an entire string from one encoding to another.
+     * @note This function does not treat zero characters specially.
+     * @param tocode_cp Target encoding codepage.
+     * @param fromcode_cp From encoding codepage.
+     * @param start Source string start pointer.
+     * @param end Source string end pointer.
+     * @param resultp Result memory pointer.
+     * @param lengthp Pointer to a variable that stores the length of the result.
+     * @param strict Strict mode, if false, will ignore the invalid characters.
+     * @return Return 0 if successful, otherwise return errno and errno set. Particular errno values: EILSEQ and ENOMEM.
+     *
+     * @example
+     *   const char* s = ...;
+     *   char* result = NULL;
+     *   if (iconv_string(65001, 936,
+     *                    s, s+strlen(s)+1, &result, NULL) != 0)
+     *   perror("iconv_string");
+     *
+     */
+    extern @DLL_VARIABLE@ int iconv_string(int tocode_cp, int fromcode_cp, const char* start,
+                                            const char* end, char** resultp, size_t* lengthp, bool strict=true);
 
     /**
      * @brief Encode source string to another encoding.
@@ -259,7 +294,7 @@ extern "C++"
      * @param ignore Ignore invalid characters.
      * @throw int: when conversation error, throw the 'errno', you can catch the errno for more infomation.
      */
-    inline std::vector<char> encode(std::string from, std::string to, const std::vector<char> &data,
+    inline std::vector<char> encode(const std::string& from, const std::string& to, const std::vector<char>& data,
                                     bool ignore = false)
     {
         char *result = NULL;

lib/hkscs2001.h

@@ -59,7 +59,7 @@ static int
 hkscs2001_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
 {
   unsigned char c1 = s[0];
-  if ((c1 == (unsigned char)0x8c)) {
+  if (c1 == (unsigned char)0x8c) {
     if (n >= 2) {
       unsigned char c2 = s[1];
       if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff)) {

lib/hkscs2008.h

@@ -55,7 +55,7 @@ static int
 hkscs2008_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
 {
   unsigned char c1 = s[0];
-  if ((c1 == (unsigned char)0x87)) {
+  if (c1 == (unsigned char)0x87) {
     if (n >= 2) {
       unsigned char c2 = s[1];
       if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff)) {