From 4b73f702325d3d7cd90415e7db1886e3d5bf2b7f Mon Sep 17 00:00:00 2001
From: Dario Sassi <dario.sassi@egalware.com>
Date: Fri, 10 Jan 2025 16:27:56 +0100
Subject: [PATCH] Include : - migliorie e ottimizzazioni a ToString con interi.

---
 EGnStringUtils.h | 50 +++++++++++++++++++++++++-----------------------
 1 file changed, 26 insertions(+), 24 deletions(-)

diff --git a/EGnStringUtils.h b/EGnStringUtils.h
index 2b20a4a..8cf93e5 100644
--- a/EGnStringUtils.h
+++ b/EGnStringUtils.h
@@ -184,45 +184,47 @@ EGN_EXPORT bool FromString( const std::string& sVal, DBLVECTOR& vdVal) ;
 EGN_EXPORT bool FromString( const std::string& sVal, STRVECTOR& vsVal) ;
 
 //----------------------------------------------------------------------------
+EGN_EXPORT const std::string ToStringAdv( int nVal, int nPrec = 1, int nRadix = 10, int* pnErr = nullptr) ;
 inline const std::string
-ToString( int nVal, int nPrec = 1, int nRadix = 10)
+ToString( int nVal, int nPrec = 1, int nRadix = 10, int* pnErr = nullptr)
       {
+        // se necessario processing avanzato
+         if ( nPrec > 1  ||  nRadix < 6)
+            return ToStringAdv( nVal, nPrec, nRadix, pnErr) ;
         // eseguo conversione
-         const int nBuffSize = 36 ;
+         const int nBuffSize = 16 ;
          char szBuff[nBuffSize]{} ;
          auto Res = std::to_chars( szBuff, szBuff + nBuffSize - 1, nVal, nRadix) ;
          if ( Res.ec != std::errc()) {
-            std::string sOut = make_error_code( Res.ec).message() ;
-            return "#Error (" + sOut + ")" ;
+            if ( pnErr != nullptr)
+               *pnErr = int( Res.ec) ;
+            return "#Error" ;
          }
-        // verifico lunghezza minima
-         int  nLen = (int) strlen( szBuff) ;
-         if ( nLen >= nPrec)
-            return szBuff ;
-        // porto la stringa alla minima lunghezza
-         std::string sBuff( szBuff)  ;
-         sBuff.insert( 0, ( nPrec - nLen), '0') ;
-         return sBuff ;
+        // gestione codice di errore
+         if ( pnErr != nullptr)
+            *pnErr = 0 ;
+         return szBuff ;
       }
+EGN_EXPORT const std::string ToStringAdv( unsigned int nVal, int nPrec = 1, int nRadix = 10, int* pnErr = nullptr) ;
 inline const std::string
-ToString( unsigned int nVal, int nPrec = 1, int nRadix = 10)
+ToString( unsigned int nVal, int nPrec = 1, int nRadix = 10, int* pnErr = nullptr)
       {
+        // se necessario processing avanzato
+         if ( nPrec > 1  ||  nRadix < 6)
+            return ToStringAdv( nVal, nPrec, nRadix, pnErr) ;
         // eseguo conversione
-         const int nBuffSize = 36 ;
+         const int nBuffSize = 16 ;
          char szBuff[nBuffSize]{} ;
          auto Res = std::to_chars( szBuff, szBuff + nBuffSize - 1, nVal, nRadix) ;
          if ( Res.ec != std::errc()) {
-            std::string sOut = make_error_code( Res.ec).message() ;
-            return "#Error (" + sOut + ")" ;
+            if ( pnErr != nullptr)
+               *pnErr = int( Res.ec) ;
+            return "#Error" ;
          }
-        // verifico lunghezza minima
-         int  nLen = (int) strlen( szBuff) ;
-         if ( nLen >= nPrec)
-            return szBuff ;
-        // porto la stringa alla minima lunghezza
-         std::string sBuff( szBuff)  ;
-         sBuff.insert( 0, ( nPrec - nLen), '0') ;
-         return sBuff ;
+        // gestione codice di errore
+         if ( pnErr != nullptr)
+            *pnErr = 0 ;
+         return szBuff ;
       }
 template <size_t size>
 const std::string ToString( const int (&nVal)[size], int nPrec = 1)