1 files changed, 151 insertions, 26 deletions
diff --git a/Master/texmf-dist/source/latex/datatool/datatool.dtx b/Master/texmf-dist/source/latex/datatool/datatool.dtx
index ac9fe123f73..9e9ddec7ae3 100644
--- a/Master/texmf-dist/source/latex/datatool/datatool.dtx
+++ b/Master/texmf-dist/source/latex/datatool/datatool.dtx
@@ -19,7 +19,7 @@
 %   -author "Nicola Talbot"
 %   -codetitle ""
 %   datatool
-% Created on 2014/1/17 12:07
+% Created on 2014/2/3 15:28
 %\fi
 %\iffalse
 %<*package>
@@ -66,7 +66,7 @@ datatool.dtx
 \doxitem{Counter}{counter}{counters}
 \doxitem{Option}{option}{package options}
 
-\CheckSum{22929}
+\CheckSum{22983}
 
 \RecordChanges
 \PageIndex
@@ -79,11 +79,11 @@ datatool.dtx
 %\fi
 %\MakeShortVerb{"}
 %
-%\title{Documented Code for datatool v2.19}
+%\title{Documented Code for datatool v2.20}
 %\author{Nicola L. C. Talbot\\
 %\url{http://www.dickimaw-books.com/}}
 %
-%\date{2014-01-17}
+%\date{2014-02-03}
 %\maketitle
 %
 %\pagenumbering{roman}
@@ -5708,7 +5708,7 @@ datatool.dtx
 %\section{Package Declaration}
 %    \begin{macrocode}
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{datatool}[2014/01/17 v2.19 (NLCT)]
+\ProvidesPackage{datatool}[2014/02/03 v2.20 (NLCT)]
 %    \end{macrocode}
 % Load required packages:
 %    \begin{macrocode}
@@ -7160,13 +7160,79 @@ datatool.dtx
 %\changes{2.10}{2012-07-18}{new}
 %    \begin{macrocode}
 \newcommand*{\DTLassign}[3]{%
+  \DTLifdbexists{#1}
+  {%
 %    \end{macrocode}
 % Grouped in the event that \cs{dtlcurrentrow} is already in use.
 % (Assignments in \cs{@dtl@assign} are global.)
 %    \begin{macrocode}
-  {%
-    \dtlgetrow{#1}{#2}%
+    {%
+      \dtlgetrow{#1}{#2}%
     \@dtl@assign{#3}{#1}%
+    }%
+  }%
+  {%
+    \PackageError{datatool}{Database `#1' doesn't exist}{}%
+  }%
+}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\DTLassignfirstmatch}
+%\begin{definition}
+%\cs{DTLassignfirstmatch}\marg{db}\marg{col key}\marg{value}\marg{assign list}
+%\end{definition}
+% Applies the assignment list to the first row that has the given
+% value in the given column. (Value must be expanded.)
+%\changes{2.20}{2014-02-14}{new}
+%    \begin{macrocode}
+\newcommand*{\DTLassignfirstmatch}[4]{%
+  \dtl@assignfirstmatch{#3}{#1}{#2}{#4}%
+}
+%    \end{macrocode}
+%\end{macro}
+%\begin{macro}{\xDTLassignfirstmatch}
+%\begin{definition}
+%\cs{xDTLassignfirstmatch}\marg{db}\marg{col key}\marg{value}\marg{assign list}
+%\end{definition}
+% Applies the assignment list to the first row that has the given
+% value in the given column. (Performs \emph{one level} expansion on
+% \meta{value}.)
+%\changes{2.20}{2014-02-14}{new}
+%    \begin{macrocode}
+\newcommand*{\xDTLassignfirstmatch}[4]{%
+  \protected@edef\@dtl@asg@value{\expandonce{#3}}%
+  \expandafter\dtl@assignfirstmatch\expandafter
+   {\@dtl@asg@value}{#1}{#2}{#4}%
+}
+%    \end{macrocode}
+%\end{macro}
+%\begin{macro}{\dtl@assignfirstmatch}
+% Internal swaps the ordering around so the value is first. (This
+% just makes it easier for \cs{xDTLassignfirstmatch}
+%    \begin{macrocode}
+\newcommand*{\dtl@assignfirstmatch}[4]{%
+  \DTLifdbexists{#2}%
+  {%
+% Grouped in the event that \cs{dtlcurrentrow} is already in use.
+% (Assignments in \cs{@dtl@assign} are global.)
+%    \begin{macrocode}
+    {%
+%    \end{macrocode}
+% Get row idx:
+%    \begin{macrocode}
+      \dtlgetrowindex{\dtl@asg@rowidx}{#2}{\dtlcolumnindex{#2}{#3}}{#1}%
+      \ifx\dtl@asg@rowidx\dtlnovalue
+        \PackageError{datatool}{No match found for
+          \string\DTLassignfirstmatch{#2}{#3}{#1}{#4}}{}%
+      \else
+        \dtlgetrow{#2}{\dtl@asg@rowidx}%
+        \@dtl@assign{#4}{#2}%
+      \fi
+    }%
+  }%
+  {%
+    \PackageError{datatool}{Data base `#2' doesn't exist}{}%
   }%
 }
 %    \end{macrocode}
@@ -7180,9 +7246,13 @@ datatool.dtx
 % The current row must be stored in \cs{dtlcurrentrow}.
 %\changes{2.0}{2009 February 27}{updated to use new database
 % structure}
+%\changes{2.20}{2014-02-14}{Added check for empty argument}%
 %    \begin{macrocode}
 \newcommand*{\@dtl@assign}[2]{%
-  \@dtl@assigncmd#1,\@nil\@@{#2}%
+  \ifstrempty{#1}{}%
+  {%
+    \@dtl@assigncmd#1,\@nil\@@{#2}%
+  }%
 }
 %    \end{macrocode}
 %\end{macro}
@@ -7196,6 +7266,12 @@ datatool.dtx
 %    \begin{macrocode}
 \def\@dtl@assigncmd#1#2=#3,#4\@@#5{%
 %    \end{macrocode}
+% Store database label. (This may already have been done so \cs{edef}
+% is used to prevent infinite recursion.)
+%\changes{2.20}{2014-02-03}{Stored db label in \cs{@dtl@dbname}}
+%    \begin{macrocode}
+  \edef\@dtl@dbname{#5}%
+%    \end{macrocode}
 % get entry for ID given by \#3 and store in \#2
 %    \begin{macrocode}
   \@sDTLifhaskey{#5}{#3}%
@@ -7207,9 +7283,11 @@ datatool.dtx
 %    \end{macrocode}
 % Set to null if required
 %    \begin{macrocode}
-    \ifx#1\dtlnovalue
+    \ifdefequal{#1}{\dtlnovalue}%
+    {%
       \@@dtl@setnull{#1}{#3}%
-    \fi
+    }%
+    {}%
 %    \end{macrocode}
 %  Make it global
 %    \begin{macrocode}
@@ -7351,6 +7429,18 @@ datatool.dtx
 %    \end{macrocode}
 %\end{macro}
 %
+%\begin{macro}{\DTLifnullorempty}
+%\begin{definition}
+%\cs{DTLifnullorempty}\marg{command}\marg{true part}\marg{false part}
+%\end{definition}
+%\changes{2.20}{2014-02-14}{new}
+%    \begin{macrocode}
+\newcommand*{\DTLifnullorempty}[3]{%
+  \ifdefempty{#1}{#2}{\DTLifnull{#1}{#2}{#3}}%
+}
+%    \end{macrocode}
+%\end{macro}
+%
 %\begin{macro}{\@dtlnovalue}
 %    \begin{macrocode}
 \def\@dtlnovalue{Undefined Value}
@@ -8618,8 +8708,9 @@ datatool.dtx
     \global\c@DTLrow=\c@DTLrow\relax
 %    \end{macrocode}
 % Store database name
+%\changes{2.20}{2014-02-03}{change \cs{gdef} to \cs{xdef}}
 %    \begin{macrocode}
-    \gdef\@dtl@dbname{#2}%
+    \xdef\@dtl@dbname{#2}%
 %    \end{macrocode}
 % Increment level and check not exceeded 3
 %    \begin{macrocode}
@@ -8891,6 +8982,11 @@ datatool.dtx
 %    \begin{macrocode}
     \global\c@DTLrow=\c@DTLrow
 %    \end{macrocode}
+% Store database name.
+%\changes{2.20}{2014-02-03}{Added missing \cs{@dtl@dbname} assignment}
+%    \begin{macrocode}
+    \xdef\@dtl@dbname{#2}%
+%    \end{macrocode}
 % Increment level and check not exceeded 3
 %    \begin{macrocode}
     \global\advance\dtlforeachlevel by 1\relax
@@ -10482,18 +10578,18 @@ datatool.dtx
 %    \end{macrocode}
 % Iterate over all the listed data bases
 %    \begin{macrocode}
-  \@for\@dtl@dbname:=#2\do{%
+  \@for\@dtl@db@name:=#2\do{%
 %    \end{macrocode}
 % Iterate through this database (using read only version)
 %    \begin{macrocode}
-    \@sDTLforeach{\@dtl@dbname}%
+    \@sDTLforeach{\@dtl@db@name}%
     {#1}% assignment list
     {%
 %    \end{macrocode}
 % Iterate through key list.
 %    \begin{macrocode}
       \@for\@dtl@key:=#3\do{%
-        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@dbname}{\@dtl@key}%
+        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@db@name}{\@dtl@key}%
         \dtlcurrentrow=\expandafter{\dtl@thisrow}%
         \dtlgetentryfromrow{\DTLthisval}{\@dtl@col}{\dtlcurrentrow}%
         \expandafter\ifthenelse\expandafter{\@dtl@cond}%
@@ -10585,18 +10681,18 @@ datatool.dtx
 %    \end{macrocode}
 % Iterate over all the listed data bases
 %    \begin{macrocode}
-  \@for\@dtl@dbname:=#2\do{%
+  \@for\@dtl@db@name:=#2\do{%
 %    \end{macrocode}
 % Iterate through this database (using read only version)
 %    \begin{macrocode}
-    \@sDTLforeach{\@dtl@dbname}%
+    \@sDTLforeach{\@dtl@db@name}%
     {#1}% assignment list
     {%
 %    \end{macrocode}
 % Iterate through key list.
 %    \begin{macrocode}
       \@for\@dtl@key:=#3\do{%
-        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@dbname}{\@dtl@key}%
+        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@db@name}{\@dtl@key}%
         \dtlcurrentrow=\expandafter{\dtl@thisrow}%
         \dtlgetentryfromrow{\DTLthisval}{\@dtl@col}{\dtlcurrentrow}%
         \expandafter\ifthenelse\expandafter{\@dtl@cond}%
@@ -10705,18 +10801,18 @@ datatool.dtx
 %    \end{macrocode}
 % Iterate over all the listed data bases
 %    \begin{macrocode}
-  \@for\@dtl@dbname:=#2\do{%
+  \@for\@dtl@db@name:=#2\do{%
 %    \end{macrocode}
 % Iterate through this database (using read only version)
 %    \begin{macrocode}
-    \@sDTLforeach{\@dtl@dbname}%
+    \@sDTLforeach{\@dtl@db@name}%
     {#1}% assignment list
     {%
 %    \end{macrocode}
 % Iterate through key list.
 %    \begin{macrocode}
       \@for\@dtl@key:=#3\do{%
-        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@dbname}{\@dtl@key}%
+        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@db@name}{\@dtl@key}%
         \dtlcurrentrow=\expandafter{\dtl@thisrow}%
         \dtlgetentryfromrow{\DTLthisval}{\@dtl@col}{\dtlcurrentrow}%
         \expandafter\ifthenelse\expandafter{\@dtl@cond}%
@@ -10881,18 +10977,18 @@ datatool.dtx
 %    \end{macrocode}
 % Iterate over all the listed data bases
 %    \begin{macrocode}
-  \@for\@dtl@dbname:=#2\do{%
+  \@for\@dtl@db@name:=#2\do{%
 %    \end{macrocode}
 % Iterate through this database (using read only version)
 %    \begin{macrocode}
-    \@sDTLforeach{\@dtl@dbname}%
+    \@sDTLforeach{\@dtl@db@name}%
     {#1}% assignment list
     {%
 %    \end{macrocode}
 % Iterate through key list.
 %    \begin{macrocode}
       \@for\@dtl@key:=#3\do{%
-        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@dbname}{\@dtl@key}%
+        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@db@name}{\@dtl@key}%
         \dtlcurrentrow=\expandafter{\dtl@thisrow}%
         \dtlgetentryfromrow{\DTLthisval}{\@dtl@col}{\dtlcurrentrow}%
         \expandafter\ifthenelse\expandafter{\@dtl@cond}%
@@ -10997,18 +11093,18 @@ datatool.dtx
 %    \end{macrocode}
 % Iterate over all the listed data bases
 %    \begin{macrocode}
-  \@for\@dtl@dbname:=#2\do{%
+  \@for\@dtl@db@name:=#2\do{%
 %    \end{macrocode}
 % Iterate through this database (using read only version)
 %    \begin{macrocode}
-    \@sDTLforeach{\@dtl@dbname}%
+    \@sDTLforeach{\@dtl@db@name}%
     {#1}% assignment list
     {%
 %    \end{macrocode}
 % Iterate through key list.
 %    \begin{macrocode}
       \@for\@dtl@key:=#3\do{%
-        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@dbname}{\@dtl@key}%
+        \@sdtl@getcolumnindex{\@dtl@col}{\@dtl@db@name}{\@dtl@key}%
         \dtlcurrentrow=\expandafter{\dtl@thisrow}%
         \dtlgetentryfromrow{\DTLthisval}{\@dtl@col}{\dtlcurrentrow}%
         \expandafter\ifthenelse\expandafter{\@dtl@cond}%
@@ -12381,6 +12477,35 @@ datatool.dtx
 %
 %\section{Loading a database from an external file}
 %
+%\begin{macro}{\DTLloaddbtex}
+%\begin{definition}
+%\cs{DTLloaddbtex}\marg{cs}\marg{file}
+%\end{definition}
+% Load a \texttt{.dbtex} file and assign the database name to the
+% control sequence \meta{cs}. Checks the file name exists and the
+% control sequence doesn't exist.
+%\changes{2.20}{2014-02-14}{new}
+%    \begin{macrocode}
+\newcommand*{\DTLloaddbtex}[2]{%
+  \IfFileExists{#2}%
+  {%
+    \input{#2}%
+    \ifdef#1%
+    {%
+      \PackageError{datatool}{Command \string#1\space is already defined}%
+      {}%
+    }%
+    {%
+      \let#1\dtllastloadeddb
+    }%
+  }%
+  {%
+    \PackageError{datatool}{File `#2' doesn't exist.}{}%
+  }%
+}
+%    \end{macrocode}
+%\end{macro}
+%
 %\begin{macro}{\@dtl@read}
 %    \begin{macrocode}
 \newread\@dtl@read