Compiler/Simple file inclusion pre processor: Difference between revisions

Content added Content deleted
(Added AWK)
(→‎{{header|AWK}}: Use @include, as in GAWK)
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=={{header|AWK}}==
=={{header|AWK}}==
AWK does not have file-inclusion as standard, however some implementations, particularly GNU Awk do provide file inclusion.
AWK does not have file-inclusion as standard, however some implementations, particularly GNU Awk do provide file inclusion.
<br>This include pre-processor differs from GAWK syntax in that the include directive is ".include", not "@include" and ".include" can appear inside or outside functions. The file name can be quoted or not. Nested includes are not supported.
<br>This include pre-processor differs from GAWK syntax in that the include directive can appear inside or outside functions. The file name can be quoted or not. Nested includes are not supported.
<br>The source can be a named file or read from stdin. If it is read from stdin, <code>-v sec=sourceName</code> can be specified on the AWK command line to name the file. The pre-processed source is writen to stdout.
<br>The source can be a named file or read from stdin. If it is read from stdin, <code>-v sec=sourceName</code> can be specified on the AWK command line to name the file. The pre-processed source is writen to stdout.
<lang awk># include.awk: simple file inclusion pre-processor
<lang awk># include.awk: simple file inclusion pre-processor
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{
{


if( $1 == ".include" )
if( $1 == "@include" )
{
{
# must include a file
# must include a file
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{
{


# get the file name from the .include line
# get the file name from the @include line
fileName = includeLine;
fileName = includeLine;
sub( /^ *.include */, "", fileName );
sub( /^ *@include */, "", fileName );
sub( / *$/, "", fileName );
sub( / *$/, "", fileName );
sub( / *#.*$/, "", fileName );
sub( / *#.*$/, "", fileName );
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{
{
# I/O error
# I/O error
printf( ".include %s # not found or I/O error\n",
printf( "@include %s # not found or I/O error\n",
fileName );
fileName );


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