StrSub to get substrings

Interface/ProParser.l

@@ -408,6 +408,7 @@ StrChoice                    return tStrChoice;
 StrCmp                       return tStrCmp;
 StrFind                      return tStrFind;
 StrLen                       return tStrLen;
+StrSub                       return tStrSub;
 StringToName                 return tStringToName;
 S2N                          return tStringToName;
 SubFunction                  return tSubFunction;

Interface/ProParser.y

@@ -200,7 +200,7 @@ struct doubleXstring{
 %token  tStr
 %token  tStrCat tSprintf tPrintf tMPI_Printf tRead tPrintConstants
 %token  tStrCmp tStrFind tStrLen
-%token  tStrChoice tUpperCase tLowerCase tLowerCaseIn
+%token  tStrChoice tStrSub tUpperCase tLowerCase tLowerCaseIn
 %token  tNbrRegions tGetRegion tStringToName tNameToString
 %token  tFor tEndFor tIf tElseIf tElse tEndIf tMacro tReturn tCall tCallTest
 %token  tTest tWhile tParse
@@ -9362,6 +9362,24 @@ CharExprNoVar :
       }
     }
 
+  | tStrSub LP CharExpr ',' FExpr ',' FExpr RP
+    {
+      std::string in = $3;
+      std::string out = in.substr((int)$5, (int)$7);
+      $$ = (char *)Malloc((out.size() + 1) * sizeof(char));
+      strcpy($$, out.c_str());
+      Free($3);
+    }
+
+  | tStrSub LP CharExpr ',' FExpr RP
+    {
+      std::string in = $3;
+      std::string out = in.substr((int)$5, std::string::npos);
+      $$ = (char *)Malloc((out.size() + 1) * sizeof(char));
+      strcpy($$, out.c_str());
+      Free($3);
+    }
+
   | tSprintf LP CharExpr RP
     {
       $$ = $3;

doc/VERSIONS.txt

@@ -43,7 +43,7 @@ version, improved EigenSolve (quadratic EVP with SLEPC, EVP on real matrices),
 new CosineTransform, MPI_Printf, SendMergeFileRequest parser commands, small
 improvements and bug fixes.
 
-2.4.3 (February 7, 2104): new mandatory 'Name' attribute to define onelab
+2.4.3 (February 7, 2014): new mandatory 'Name' attribute to define onelab
 variables in DefineConstant[] & co; minor bug fixes.
 
 2.4.2 (Septembre 27, 2013): fixed function arguments in nested expressions;

doc/texinfo/getdp.texi

@@ -1227,6 +1227,8 @@ Character expressions are defined as follows:
   StrCat[ @var{expression-char} <,@dots{}> ] |
   Str[ @var{expression-char} <,@dots{}> ]
   StrChoice[ @var{expression}, @var{expression-char}, @var{expression-char} ] |
+  StrSub[ @var{expression-char}, @var{expression}, @var{expression} ] |
+  StrSub[ @var{expression-char}, @var{expression} ] |
   UpperCase [ @var{expression-char} ] |
   Sprintf [ @var{expression-char} ] |
   Sprintf[ @var{expression-char}, @var{expression-cst-list} ] |
@@ -1243,18 +1245,22 @@ character expressions (@code{Str} adds a newline character after each
 string except the last) when creating a string. @code{Str} is also used
 to create string lists (when @var{string-id} is followed by
 @code{()}). @code{StrChoice} returns the first or second
-@var{expression-char} depending on the value of
-@var{expression}. @code{UpperCase} converts the @var{expression-char} to
-upper case. @code{Sprintf} is equivalent to the @code{sprintf} C
-function (where @var{expression-char} is a format string that can
-contain floating point formatting characters: @code{%e}, @code{%g},
-etc.).  @code{NameToString} converts a variable name into a string.
-@code{GetString} allows to get the value of a ONELAB string variable
-(the optional second argument specifies the default value returned if
-the variable does not exist.)  @code{Date} permits to access the current
-date. @code{CurrentDirectory} and @code{CurrentDir} return the directory
-of the @code{.pro} file. @code{AbsolutePath} returns the absolute path
-of a file. @code{DirName} returns the directory of a
+@var{expression-char} depending on the value of @var{expression}.
+@code{StrSub} returns the portion of the string that starts at the
+character position given by the first @var{expression} and spans the
+number of characters given by the second @var{expression} or until the
+end of the string (whichever comes first; or always if the second
+@var{expression} is not provided). @code{UpperCase} converts the
+@var{expression-char} to upper case. @code{Sprintf} is equivalent to the
+@code{sprintf} C function (where @var{expression-char} is a format
+string that can contain floating point formatting characters: @code{%e},
+@code{%g}, etc.).  @code{NameToString} converts a variable name into a
+string.  @code{GetString} allows to get the value of a ONELAB string
+variable (the optional second argument specifies the default value
+returned if the variable does not exist.)  @code{Date} permits to access
+the current date. @code{CurrentDirectory} and @code{CurrentDir} return
+the directory of the @code{.pro} file. @code{AbsolutePath} returns the
+absolute path of a file. @code{DirName} returns the directory of a
 file. @code{OnelabAction} returns the current ONELAB action
 (e.g. @code{check} or @code{compute}).