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Strings.mo
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Strings.mo
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within Modelica.Utilities;
package Strings "Operations on strings"
extends Modelica.Icons.FunctionsPackage;
pure function length "Return length of string"
extends Modelica.Icons.Function;
input String string;
output Integer result "Number of characters of string";
external "C" result = ModelicaStrings_length(string) annotation(IncludeDirectory="modelica://Modelica/Resources/C-Sources", Include="#include \"ModelicaStrings.h\"", Library="ModelicaExternalC");
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
Strings.<strong>length</strong>(string);
</pre></blockquote>
<h4>Description</h4>
<p>
Returns the number of characters of \"string\".
</p>
</html>"));
end length;
pure function substring "Return a substring defined by start and end index"
extends Modelica.Icons.Function;
input String string "String from which a substring is inquired";
input Integer startIndex(min=1)
"Character position of substring begin (index=1 is first character in string)";
input Integer endIndex(min=1) "Character position of substring end";
output String result
"String containing substring string[startIndex:endIndex]";
external "C" result = ModelicaStrings_substring(string,startIndex,endIndex) annotation(IncludeDirectory="modelica://Modelica/Resources/C-Sources", Include="#include \"ModelicaStrings.h\"", Library="ModelicaExternalC");
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
string2 = Strings.<strong>substring</strong>(string, startIndex, endIndex);
</pre></blockquote>
<h4>Description</h4>
<p>
This function returns
the substring from position startIndex
up to and including position endIndex of \"string\" .
</p>
<p>
If index, startIndex, or endIndex are not correct, e.g.,
if endIndex > length(string), an assert is triggered.
</p>
<h4>Example</h4>
<blockquote><pre>
string1 := \"This is line 111\";
string2 := Strings.substring(string1,9,12); // string2 = \"line\"
</pre></blockquote>
</html>"));
end substring;
function repeat "Repeat a string n times"
extends Modelica.Icons.Function;
input Integer n(min=0) = 1 "Number of occurrences";
input String string=" " "String that is repeated";
output String repeatedString "String containing n concatenated strings";
algorithm
repeatedString :="";
for i in 1:n loop
repeatedString := repeatedString + string;
end for;
annotation (
Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
string2 = Strings.<strong>repeat</strong>(n);
string2 = Strings.<strong>repeat</strong>(n, string=\" \");
</pre></blockquote>
<h4>Description</h4>
<p>
The first form returns a string consisting of n blanks.
</p>
<p>
The second form returns a string consisting of n substrings
defined by the optional argument \"string\".
</p>
</html>"));
end repeat;
pure function compare "Compare two strings lexicographically"
extends Modelica.Icons.Function;
input String string1;
input String string2;
input Boolean caseSensitive=true "= false, if case of letters is ignored";
output Modelica.Utilities.Types.Compare result "Result of comparison";
external "C" result = ModelicaStrings_compare(string1, string2, caseSensitive) annotation(IncludeDirectory="modelica://Modelica/Resources/C-Sources", Include="#include \"ModelicaStrings.h\"", Library="ModelicaExternalC");
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
result = Strings.<strong>compare</strong>(string1, string2);
result = Strings.<strong>compare</strong>(string1, string2, caseSensitive=true);
</pre></blockquote>
<h4>Description</h4>
<p>
Compares two strings. If the optional argument caseSensitive=false,
upper case letters are treated as if they would be lower case letters.
The result of the comparison is returned as:
</p>
<blockquote><pre>
result = Modelica.Utilities.Types.Compare.Less // string1 < string2
= Modelica.Utilities.Types.Compare.Equal // string1 = string2
= Modelica.Utilities.Types.Compare.Greater // string1 > string2
</pre></blockquote>
<p>
Comparison is with regards to lexicographical order,
e.g., \"a\" < \"b\";
</p>
</html>"));
end compare;
function isEqual "Determine whether two strings are identical"
extends Modelica.Icons.Function;
input String string1;
input String string2;
input Boolean caseSensitive=true
"= false, if lower and upper case are ignored for the comparison";
output Boolean identical "True, if string1 is identical to string2";
algorithm
identical :=compare(string1, string2, caseSensitive) == Types.Compare.Equal;
annotation (
Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
Strings.<strong>isEqual</strong>(string1, string2);
Strings.<strong>isEqual</strong>(string1, string2, caseSensitive=true);
</pre></blockquote>
<h4>Description</h4>
<p>
Compare whether two strings are identical,
optionally ignoring case.
</p>
</html>"));
end isEqual;
function isEmpty
"Return true if a string is empty (has only white space characters)"
extends Modelica.Icons.Function;
input String string;
output Boolean result "True, if string is empty";
protected
Integer nextIndex;
Integer len;
algorithm
nextIndex := Strings.Advanced.skipWhiteSpace(string);
len := Strings.length(string);
if len < 1 or nextIndex > len then
result := true;
else
result := false;
end if;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
Strings.<strong>isEmpty</strong>(string);
</pre></blockquote>
<h4>Description</h4>
<p>
Returns true if the string has no characters or if the string consists
only of white space characters. Otherwise, false is returned.
</p>
<h4>Example</h4>
<blockquote><pre>
isEmpty(\"\"); // returns true
isEmpty(\" \"); // returns true
isEmpty(\" abc\"); // returns false
isEmpty(\"a\"); // returns false
</pre></blockquote>
</html>"));
end isEmpty;
function count "Count the number of non-overlapping occurrences of a string"
extends Modelica.Icons.Function;
input String string "String that is analyzed";
input String searchString "String that is searched for in string";
input Integer startIndex(min=1)=1 "Start search at index startIndex";
input Boolean caseSensitive=true
"= false, if lower and upper case are ignored for count";
output Integer result "Number of occurrences of 'searchString' in 'string'";
protected
Integer lenSearchString = length(searchString);
Integer i = startIndex;
algorithm
result := 0;
while i <> 0 loop
i := find(string, searchString, i, caseSensitive);
if i > 0 then
result := result + 1;
i := i + lenSearchString;
end if;
end while;
annotation (
Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
Strings.<strong>count</strong>(string, searchString)
Strings.<strong>count</strong>(string, searchString, startIndex=1,
caseSensitive=true)
</pre></blockquote>
<h4>Description</h4>
<p>
Returns the number of non-overlapping occurrences of string \"searchString\"
in \"string\". The search is started at index \"startIndex\" (default = 1).
If the optional argument \"caseSensitive\" is false,
for the counting it does not matter whether a letter is upper
or lower case.
</p>
</html>"));
end count;
function find "Find first occurrence of a string within another string"
extends Modelica.Icons.Function;
input String string "String that is analyzed";
input String searchString "String that is searched for in string";
input Integer startIndex(min=1)=1 "Start search at index startIndex";
input Boolean caseSensitive=true
"= false, if lower and upper case are ignored for the search";
output Integer index
"Index of the beginning of the first occurrence of 'searchString' within 'string', or zero if not present";
protected
Integer lengthSearchString = length(searchString);
Integer len = lengthSearchString-1;
Integer i = startIndex;
Integer i_max = length(string) - lengthSearchString + 1;
algorithm
index := 0;
while i <= i_max loop
if isEqual(substring(string,i,i+len),
searchString, caseSensitive) then
index := i;
i := i_max + 1;
else
i := i+1;
end if;
end while;
annotation (
Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
index = Strings.<strong>find</strong>(string, searchString);
index = Strings.<strong>find</strong>(string, searchString, startIndex=1,
caseSensitive=true);
</pre></blockquote>
<h4>Description</h4>
<p>
Finds first occurrence of \"searchString\" within \"string\"
and return the corresponding index.
Start search at index \"startIndex\" (default = 1).
If the optional argument \"caseSensitive\" is false, lower
and upper case are ignored for the search.
If \"searchString\" is not found, a value of \"0\" is returned.
</p>
</html>"));
end find;
function findLast "Find last occurrence of a string within another string"
extends Modelica.Icons.Function;
input String string "String that is analyzed";
input String searchString "String that is searched for in string";
input Integer startIndex(min=0)=0
"Start search at index startIndex. If startIndex = 0, start at length(string)";
input Boolean caseSensitive=true
"= false, if lower and upper case are ignored for the search";
output Integer index
"Index of the beginning of the last occurrence of 'searchString' within 'string', or zero if not present";
protected
Integer lenString = length(string);
Integer lenSearchString = length(searchString);
Integer iMax=lenString - lenSearchString + 1;
Integer i;
algorithm
i := if startIndex == 0 or startIndex > iMax then iMax else startIndex;
index := 0;
while i >= 1 loop
if isEqual(substring(string,i,i+lenSearchString-1),
searchString, caseSensitive) then
index := i;
i := 0;
else
i := i-1;
end if;
end while;
annotation (
Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
index = Strings.<strong>findLast</strong>(string, searchString);
index = Strings.<strong>findLast</strong>(string, searchString,
startIndex=length(string), caseSensitive=true,
</pre></blockquote>
<h4>Description</h4>
<p>
Finds first occurrence of \"searchString\" within \"string\"
when searching from the last character of \"string\"
backwards, and return the corresponding index.
Start search at index \"startIndex\" (default = 0;
if startIndex = 0, search starts at length(string)).
If the optional argument \"caseSensitive\" is false, lower
and upper case are ignored for the search.
If \"searchString\" is not found, a value of \"0\" is returned.
</p>
</html>"));
end findLast;
function replace
"Replace non-overlapping occurrences of a string from left to right"
extends Modelica.Icons.Function;
input String string "String to be modified";
input String searchString
"Replace non-overlapping occurrences of 'searchString' in 'string' with 'replaceString'";
input String replaceString
"String that replaces 'searchString' in 'string'";
input Integer startIndex=1 "Start search at index startIndex";
input Boolean replaceAll=true
"if false, replace only the first occurrence, otherwise all occurrences";
input Boolean caseSensitive=true
"= false, if lower and upper case are ignored when searching for searchString";
output String result "Resultant string of replacement operation";
protected
Integer lenString = length(string);
Integer lenSearchString = length(searchString);
Integer i = startIndex;
Integer i_found;
algorithm
result := if startIndex == 1 then "" else substring(string,1,startIndex-1);
while i > 0 loop
i_found := find(string, searchString, i, caseSensitive);
if i_found > 0 then
result := if i_found == 1 then
replaceString else
result + (if i_found-1<i then "" else substring(string, i, i_found-1)) + replaceString;
i := i_found + lenSearchString;
if i > lenString then
i := 0;
elseif not replaceAll then
result := result + substring(string, i, lenString);
i := 0;
end if;
elseif lenString<i then
i := 0;
else
result := result + substring(string, i, lenString);
i := 0;
end if;
end while;
annotation (
Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
Strings.<strong>replace</strong>(string, searchString, replaceString);
Strings.<strong>replace</strong>(string, searchString, replaceString,
startIndex=1, replaceAll=true, caseSensitive=true);
</pre></blockquote>
<h4>Description</h4>
<p>
Search in \"string\" for \"searchString\" and replace the found
substring by \"replaceString\".
</p>
<ul>
<li> The search starts at the first character of \"string\",
or at character position \"startIndex\",
if this optional argument is provided.</li>
<li> If the optional argument \"replaceAll\" is <strong>true</strong> (default),
all occurrences of \"searchString\" are replaced.
If the argument is <strong>false</strong>, only the first occurrence
is replaced.</li>
<li> The search for \"searchString\" distinguishes upper and lower
case letters. If the optional argument \"caseSensitive\" is
<strong>false</strong>,
the search ignores whether letters are upper
or lower case.</li>
</ul>
<p>
The function returns the \"string\" with the
performed replacements.
</p>
</html>"));
end replace;
function sort "Sort vector of strings in alphabetic order"
extends Modelica.Icons.Function;
input String stringVector1[:] "Vector of strings";
input Boolean caseSensitive=true
"= false, if lower and upper case are ignored when comparing elements of stringVector1";
output String stringVector2[size(stringVector1,1)]
"stringVector1 sorted in alphabetical order";
/* shellsort algorithm; should be improved later */
protected
Integer gap;
Integer i;
Integer j;
String tempString;
Integer nStringVector1 = size(stringVector1,1);
Boolean swap;
algorithm
stringVector2 := stringVector1;
gap := div(nStringVector1,2);
while gap > 0 loop
i := gap;
while i < nStringVector1 loop
j := i-gap;
if j >= 0 then
swap := compare(stringVector2[j+1], stringVector2[j+gap+1], caseSensitive)
== Modelica.Utilities.Types.Compare.Greater;
else
swap := false;
end if;
while swap loop
tempString := stringVector2[j+1];
stringVector2[j+1] := stringVector2[j+gap+1];
stringVector2[j+gap+1] := tempString;
j := j - gap;
if j >= 0 then
swap := compare(stringVector2[j+1], stringVector2[j+gap+1], caseSensitive)
== Modelica.Utilities.Types.Compare.Greater;
else
swap := false;
end if;
end while;
i := i + 1;
end while;
gap := div(gap,2);
end while;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
stringVector2 = Streams.<strong>sort</strong>(stringVector1);
stringVector2 = Streams.<strong>sort</strong>(stringVector1, caseSensitive=true);
</pre></blockquote>
<h4>Description</h4>
<p>
Function <strong>sort</strong>(..) sorts a string vector stringVector1
in lexicographical order and returns the result in stringVector2.
If the optional argument \"caseSensitive\" is <strong>false</strong>, lower
and upper case letters are not distinguished.
</p>
<h4>Example</h4>
<blockquote><pre>
s1 = {\"force\", \"angle\", \"pressure\"};
s2 = Strings.sort(s1);
-> s2 = {\"angle\", \"force\", \"pressure\"};
</pre></blockquote>
</html>"));
end sort;
pure function hashString "Create a hash value of a string"
extends Modelica.Icons.Function;
input String string "The string to create a hash from";
output Integer hash "The hash value of string";
external "C" hash= ModelicaStrings_hashString(string)
annotation(IncludeDirectory="modelica://Modelica/Resources/C-Sources", Include="#include \"ModelicaStrings.h\"", Library="ModelicaExternalC");
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
hash = Strings.<strong>hashString</strong>(string);
</pre></blockquote>
<h4>Description</h4>
<p>
Returns an Integer hash value of the provided string
(the hash can be any Integer, including zero or a negative number).
</p>
<h4>Example</h4>
<blockquote><pre>
hashString(\"this is a test\") // = 1827717433
hashString(\"Controller.noise1\") // = -1025762750
</pre></blockquote>
</html>", revisions="<html>
<table border=\"1\" cellspacing=\"0\" cellpadding=\"2\">
<tr><th>Date</th> <th align=\"left\">Description</th></tr>
<tr><td> June 22, 2015 </td>
<td>
<table border=\"0\">
<tr><td>
<img src=\"modelica://Modelica/Resources/Images/Logos/dlr_logo.png\">
</td><td valign=\"bottom\">
Initial version implemented by
A. Klöckner, F. v.d. Linden, D. Zimmer, M. Otter.<br>
<a href=\"http://www.dlr.de/rmc/sr/en\">DLR Institute of System Dynamics and Control</a>
</td></tr></table>
</td></tr>
</table>
</html>"));
end hashString;
function scanToken "Scan for the next token and return it"
extends Modelica.Icons.Function;
input String string "String to be scanned";
input Integer startIndex(min=1) = 1
"Start scanning of string at character startIndex";
input Boolean unsigned=false
"= true, if Real and Integer tokens shall not start with a sign";
output Types.TokenValue token "Scanned token";
output Integer nextIndex
"Index of character after the found token; = 0, if NoToken";
protected
Integer startTokenIndex;
algorithm
// Initialize token
token.real :=0.0;
token.integer :=0;
token.boolean :=false;
token.string :="";
// skip white space and line comments
startTokenIndex := Advanced.skipLineComments(string, startIndex);
if startTokenIndex > length(string) then
token.tokenType := Modelica.Utilities.Types.TokenType.NoToken;
nextIndex := startTokenIndex;
else
// scan Integer number
(nextIndex, token.integer) := Advanced.scanInteger(string, startTokenIndex, unsigned);
token.tokenType := Types.TokenType.IntegerToken;
// scan Real number
if nextIndex == startTokenIndex then
(nextIndex, token.real) :=Advanced.scanReal(string, startTokenIndex, unsigned);
token.tokenType := Types.TokenType.RealToken;
end if;
// scan String
if nextIndex == startTokenIndex then
(nextIndex,token.string) := Advanced.scanString(string, startTokenIndex);
token.tokenType:= Types.TokenType.StringToken;
end if;
// scan Identifier or Boolean
if nextIndex == startTokenIndex then
(nextIndex,token.string) := Advanced.scanIdentifier(string, startTokenIndex);
if nextIndex > startTokenIndex then
if token.string == "false" then
token.string := "";
token.boolean :=false;
token.tokenType := Types.TokenType.BooleanToken;
elseif token.string == "true" then
token.string := "";
token.boolean := true;
token.tokenType := Types.TokenType.BooleanToken;
else
token.tokenType := Types.TokenType.IdentifierToken;
end if;
end if;
end if;
// scan Delimiter
if nextIndex == startTokenIndex then
token.string :=substring(string, startTokenIndex, startTokenIndex);
token.tokenType := Types.TokenType.DelimiterToken;
nextIndex := startTokenIndex + 1;
end if;
end if;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
(token, nextIndex) = Strings.<strong>scanToken</strong>(string, startIndex, unsigned=false);
</pre></blockquote>
<h4>Description</h4>
<p>
Function <strong>scanToken</strong> scans the string starting at index
\"startIndex\" and returns the next token, as well as the
index directly after the token. The returned token is a record
that holds the type of the token and the value of the token:
</p>
<table border=\"1\" cellspacing=\"0\" cellpadding=\"2\">
<tr><td>token.tokenType</td>
<td>Type of the token, see below</td></tr>
<tr><td>token.real</td>
<td>Real value if tokenType == TokenType.RealToken</td></tr>
<tr><td>token.integer</td>
<td>Integer value if tokenType == TokenType.IntegerToken</td></tr>
<tr><td>token.boolean</td>
<td>Boolean value if tokenType == TokenType.BooleanToken</td></tr>
<tr><td>token.string</td>
<td>String value if tokenType == TokenType.StringToken/IdentifierToken/DelimiterToken</td></tr>
</table>
<p>
Variable token.tokenType is an enumeration (emulated as a package
with constants) that can have the following values:
</p>
<blockquote><pre>
import T = Modelica.Utilities.Types.TokenType;
</pre></blockquote>
<table border=\"1\" cellspacing=\"0\" cellpadding=\"2\">
<tr><td>T.RealToken</td>
<td>Modelica Real literal (e.g., 1.23e-4)</td></tr>
<tr><td>T.IntegerToken</td>
<td>Modelica Integer literal (e.g., 123)</td></tr>
<tr><td>T.BooleanToken</td>
<td>Modelica Boolean literal (e.g., false)</td></tr>
<tr><td>T.StringToken</td>
<td>Modelica String literal (e.g., \"string 123\")</td></tr>
<tr><td>T.IdentifierToken</td>
<td>Modelica identifier (e.g., \"force_a\")</td></tr>
<tr><td>T.DelimiterToken</td>
<td>any character without white space that does not appear<br>
as first character in the tokens above (e.g., \"&\")</td></tr>
<tr><td>T.NoToken</td>
<td>White space, line comments and no other token<br>
until the end of the string</td></tr>
</table>
<p>
Modelica line comments (\"// ... end-of-line/end-of-string\")
as well as white space is ignored.
If \"unsigned=true\", a Real or Integer literal
is not allowed to start with a \"+\" or \"-\" sign.
</p>
<h4>Example</h4>
<blockquote><pre>
import Modelica.Utilities.Strings;
import T = Modelica.Utilities.Types.TokenType;
(token, index) := Strings.scanToken(string);
<strong>if</strong> token.tokenType == T.RealToken <strong>then</strong>
realValue := token.real;
<strong>elseif</strong> token.tokenType == T.IntegerToken <strong>then</strong>
integerValue := token.integer;
<strong>elseif</strong> token.tokenType == T.BooleanToken <strong>then</strong>
booleanValue := token.boolean;
<strong>elseif</strong> token.tokenType == T.Identifier <strong>then</strong>
name := token.string;
<strong>else</strong>
Strings.syntaxError(string,index,\"Expected Real, Integer, Boolean or identifier token\");
<strong>end if</strong>;
</pre></blockquote>
</html>"));
end scanToken;
function scanReal
"Scan for the next Real number and trigger an assert if not present"
extends Modelica.Icons.Function;
input String string "String to be scanned";
input Integer startIndex(min=1)=1
"Start scanning of string at character startIndex";
input Boolean unsigned=false
"= true, if Real token shall not start with a sign";
input String message=""
"Message used in error message if scan is not successful";
output Real number "Value of real number";
output Integer nextIndex "Index of character after the found number";
algorithm
(nextIndex, number) :=Advanced.scanReal(string, startIndex, unsigned);
if nextIndex == startIndex then
nextIndex :=Advanced.skipWhiteSpace(string, startIndex);
if unsigned then
syntaxError(string, nextIndex, "Expected a Real number without a sign " + message);
else
syntaxError(string, nextIndex, "Expected a Real number " + message);
end if;
end if;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
number = Strings.<strong>scanReal</strong>(string);
(number, nextIndex) = Strings.<strong>scanReal</strong>(string, startIndex=1,
unsigned=false, message=\"\");
</pre></blockquote>
<h4>Description</h4>
<p>
The first form, \"scanReal(string)\", scans \"string\" for a
Real number with leading white space and returns the value.
</p>
<p>
The second form, \"scanReal(string,startIndex,unsigned)\",
scans the string starting at index
\"startIndex\", checks whether the next token is a Real literal
and returns its value as a Real number, as well as the
index directly after the Real number.
If the optional argument \"unsigned\" is <strong>true</strong>,
the real number shall not have a leading \"+\" or \"-\" sign.
</p>
<p>
If the required Real number with leading white space
is not present in \"string\", an assert is triggered.
</p>
</html>"));
end scanReal;
function scanInteger
"Scan for the next Integer number and trigger an assert if not present"
extends Modelica.Icons.Function;
input String string "String to be scanned";
input Integer startIndex(min=1)=1
"Start scanning of string at character startIndex";
input Boolean unsigned=false
"= true, if Integer token shall not start with a sign";
input String message=""
"Message used in error message if scan is not successful";
output Integer number "Value of Integer number";
output Integer nextIndex "Index of character after the found number";
algorithm
(nextIndex, number) :=Advanced.scanInteger(string, startIndex, unsigned);
if nextIndex == startIndex then
nextIndex :=Advanced.skipWhiteSpace(string, startIndex);
if unsigned then
syntaxError(string, nextIndex, "Expected an Integer number without a sign " + message);
else
syntaxError(string, nextIndex, "Expected an Integer number " + message);
end if;
end if;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
number = Strings.<strong>scanInteger</strong>(string);
(number, nextIndex) = Strings.<strong>scanInteger</strong>(string, startIndex=1,
unsigned=false, message=\"\");
</pre></blockquote>
<h4>Description</h4>
<p>
Function <strong>scanInteger</strong> scans the string starting at index
\"startIndex\", checks whether the next token is an Integer literal
and returns its value as an Integer number, as well as the
index directly after the Integer number. An assert is triggered,
if the scanned string does not contain an Integer literal with optional
leading white space.
</p>
</html>"));
end scanInteger;
function scanBoolean
"Scan for the next Boolean number and trigger an assert if not present"
extends Modelica.Icons.Function;
input String string "String to be scanned";
input Integer startIndex(min=1)=1
"Start scanning of string at character startIndex";
input String message=""
"Message used in error message if scan is not successful";
output Boolean number "Value of Boolean";
output Integer nextIndex "Index of character after the found number";
protected
String identifier;
algorithm
(nextIndex, identifier) :=Advanced.scanIdentifier(string, startIndex);
if nextIndex > startIndex then
if identifier == "false" then
number := false;
elseif identifier == "true" then
number := true;
else
nextIndex := startIndex;
end if;
end if;
if nextIndex == startIndex then
nextIndex :=Advanced.skipWhiteSpace(string, startIndex);
syntaxError(string, nextIndex,
"Expected a Boolean constant, i.e., \"false\" or \"true\" " + message);
end if;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
number = Strings.<strong>scanBoolean</strong>(string);
(number, nextIndex) = Strings.<strong>scanBoolean</strong>(string, startIndex=1, message=\"\");
</pre></blockquote>
<h4>Description</h4>
<p>
Function <strong>scanBoolean</strong> scans the string starting at index
\"startIndex\", checks whether the next token is a Boolean literal
(i.e., is either the string \"false\" or \"true\", if converted to lower case letters)
and returns its value as a Boolean number, as well as the
index directly after the Boolean number. An assert is triggered,
if the scanned string does not contain a Boolean literal with optional
leading white space.
</p>
</html>"));
end scanBoolean;
function scanString
"Scan for the next Modelica string and trigger an assert if not present"
extends Modelica.Icons.Function;
input String string "String to be scanned";
input Integer startIndex(min=1)=1
"Start scanning of string at character startIndex";
input String message=""
"Message used in error message if scan is not successful";
output String result "Value of string";
output Integer nextIndex "Index of character after the found string";
algorithm
(nextIndex, result) :=Advanced.scanString(string, startIndex);
if nextIndex == startIndex then
nextIndex :=Advanced.skipWhiteSpace(string, startIndex);
syntaxError(string, nextIndex, "Expected a string enclosed in double quotes " + message);
end if;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
string2 = Strings.<strong>scanString</strong>(string);
(string2, nextIndex) = Strings.<strong>scanString</strong>(string, startIndex=1, message=\"\");
</pre></blockquote>
<h4>Description</h4>
<p>
Function <strong>scanString</strong> scans the string starting at index
\"startIndex\", checks whether the next token is a String literal
and returns its value as a String, as well as the
index directly after the String. An assert is triggered,
if the scanned string does not contain a String literal with optional
leading white space.
</p>
</html>"));
end scanString;
function scanIdentifier
"Scan for the next Identifier and trigger an assert if not present"
extends Modelica.Icons.Function;
input String string "String to be scanned";
input Integer startIndex(min=1)=1
"Start scanning of identifier at character startIndex";
input String message=""
"Message used in error message if scan is not successful";
output String identifier "Value of Identifier";
output Integer nextIndex "Index of character after the found identifier";
algorithm
(nextIndex, identifier) :=Advanced.scanIdentifier(string, startIndex);
if nextIndex == startIndex then
nextIndex :=Advanced.skipWhiteSpace(string, startIndex);
syntaxError(string, nextIndex, "Expected an identifier " + message);
end if;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
identifier = Strings.<strong>scanIdentifier</strong>(string);
(identifier, nextIndex) = Strings.<strong>scanIdentifier</strong>(string, startIndex=1, message=\"\");
</pre></blockquote>
<h4>Description</h4>
<p>
Function <strong>scanIdentifier</strong> scans the string starting at index
\"startIndex\", checks whether the next token is an Identifier
and returns its value as a string, as well as the
index directly after the Identifier. An assert is triggered,
if the scanned string does not contain an Identifier with optional
leading white space.
</p>
</html>"));
end scanIdentifier;
function scanDelimiter
"Scan for the next delimiter and trigger an assert if not present"
extends Modelica.Icons.Function;
input String string "String to be scanned";
input Integer startIndex(min=1)=1
"Start scanning of delimiters at character startIndex";
input String requiredDelimiters[:]={","} "Delimiters that are searched";
input String message=""
"Message used in error message if scan is not successful";
output String delimiter "Found delimiter";
output Integer nextIndex "Index of character after the found delimiter";
protected
Integer lenString = length(string);
Integer lenDelimiter;
Integer nDelimiters = size(requiredDelimiters,1);
Integer endIndex;
Boolean found;
Integer i;
encapsulated function concatenate "Concatenate strings together"
import Modelica;
extends Modelica.Icons.Function;
input String strings[:];
output String string;
algorithm
string := "{\"";
for i in 1:size(strings,1) loop
if i == 1 then
string := "{\"" + strings[1] + "\"";
else
string := string + ", \"" + strings[i] + "\"";
end if;
end for;
string := string + "}";
end concatenate;
algorithm
nextIndex := Advanced.skipLineComments(string,startIndex);
found := false;
i := 1;
while not found and i <= nDelimiters loop
lenDelimiter :=length(requiredDelimiters[i]);
if lenDelimiter == 0 then
found := true;
delimiter := "";
else
endIndex :=nextIndex + lenDelimiter - 1;
if endIndex <= lenString then
if substring(string,nextIndex,endIndex) == requiredDelimiters[i] then
found := true;
delimiter := requiredDelimiters[i];
end if;
end if;
i := i + 1;
end if;
end while;
if found then
nextIndex := nextIndex + lenDelimiter;
else
if size(requiredDelimiters,1) == 1 then
syntaxError(string, nextIndex, "Expected delimiter \"" + requiredDelimiters[1] + "\"\n" + message);
else
syntaxError(string, nextIndex, "Expected a delimiter out of " +
concatenate(requiredDelimiters) + "\n" + message);
end if;
end if;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
delimiter = Strings.<strong>scanDelimiter</strong>(string);
(delimiter, nextIndex) = Strings.<strong>scanDelimiter</strong>(string, startIndex=1,
requiredDelimiters={\",\"}, message=\"\");
</pre></blockquote>
<h4>Description</h4>
<p>
Function <strong>scanDelimiter</strong> scans the string starting at index
\"startIndex\", checks whether the next token is a delimiter string
and returns its value as a string, as well as the
index directly after the delimiter. An assert is triggered,
if the scanned string does not contain a delimiter out of the
list of requiredDelimiters. Input argument requiredDelimiters is a vector
of strings. The elements may have any length, including length 0.
If an element of the requiredDelimiters is zero, white space
is treated as delimiter. The function returns delimiter=\"\" and nextIndex
is the index of the first non white space character.
</p>
</html>"));
end scanDelimiter;
function scanNoToken "Scan string and check that it contains no more token"
extends Modelica.Icons.Function;
input String string "String to be scanned";
input Integer startIndex(min=1)=1
"Start scanning of string at character startIndex";
input String message=""
"Message used in error message if scan is not successful";
protected
Integer nextIndex;
algorithm
nextIndex :=Advanced.skipLineComments(string, startIndex);
if nextIndex <= length(string) then
syntaxError(string, nextIndex, "Expected no more token " + message);
end if;
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
Strings.<strong>scanNoToken</strong>(string, startIndex=1, message=\"\");
</pre></blockquote>
<h4>Description</h4>
<p>
Function <strong>scanNoToken</strong> scans the string starting at index
\"startIndex\" and checks whether there is no more token in the
string. An assert is triggered if this is not the case,
using the \"message\" argument as additional explanation in
the error text.
</p>
</html>"));
end scanNoToken;
function syntaxError
"Print an error message, a string and the index at which scanning detected an error"
extends Modelica.Icons.Function;
input String string "String that has an error at position index";
input Integer index "Index of string at which scanning detected an error";
input String message="" "String printed at end of error message";
protected
Integer maxIndex = 40;
Integer maxLenString = 60;
Integer lenString = length(string);
String errString;
Integer index2 = if index < 1 then 1 else if index > lenString then lenString else index;
algorithm
// if "string" is too long, skip part of the string when printing it
if index2 <= maxIndex then
errString := string;
else
errString := "... " + substring(string, index2-maxIndex, lenString);
index2 := maxIndex + 5; // To mark right position
end if;
if length(errString) > maxLenString then
errString := substring(errString, 1, maxLenString) + " ...";
end if;
// Print error message
Streams.error("Syntax error at character " + String(index) + " of\n" +
errString + "\n" +
repeat(index2-1, " ") + "*" + "\n" +
message);
annotation (Documentation(info="<html>
<h4>Syntax</h4>
<blockquote><pre>
Strings.<strong>syntaxError</strong>(string, index, message);
</pre></blockquote>
<h4>Description</h4>
<p>