ExtUtils::ParseXS::UtiUsereContributed Perl DocExtUtils::ParseXS::Utilities(3)
NAME
ExtUtils::ParseXS::Utilities - Subroutines used with ExtUtils::ParseXS
SYNOPSIS
use ExtUtils::ParseXS::Utilities qw(
standard_typemap_locations
trim_whitespace
tidy_type
C_string
valid_proto_string
process_typemaps
make_targetable
map_type
standard_XS_defs
assign_func_args
analyze_preprocessor_statements
set_cond
Warn
blurt
death
check_conditional_preprocessor_statements
escape_file_for_line_directive
report_typemap_failure
);
SUBROUTINES
The following functions are not considered to be part of the public
interface. They are documented here for the benefit of future
maintainers of this module.
"standard_typemap_locations()"
o Purpose
Provide a list of filepaths where typemap files may be found. The
filepaths -- relative paths to files (not just directory paths) --
appear in this list in lowest-to-highest priority.
The highest priority is to look in the current directory.
'typemap'
The second and third highest priorities are to look in the parent
of the current directory and a directory called lib/ExtUtils
underneath the parent directory.
'../typemap',
'../lib/ExtUtils/typemap',
The fourth through ninth highest priorities are to look in the
corresponding grandparent, great-grandparent and great-great-
grandparent directories.
'../../typemap',
'../../lib/ExtUtils/typemap',
'../../../typemap',
'../../../lib/ExtUtils/typemap',
'../../../../typemap',
'../../../../lib/ExtUtils/typemap',
The tenth and subsequent priorities are to look in directories
named ExtUtils which are subdirectories of directories found in
@INC -- provided a file named typemap actually exists in such a
directory. Example:
'/usr/local/lib/perl5/5.10.1/ExtUtils/typemap',
However, these filepaths appear in the list returned by
"standard_typemap_locations()" in reverse order, i.e., lowest-to-
highest.
'/usr/local/lib/perl5/5.10.1/ExtUtils/typemap',
'../../../../lib/ExtUtils/typemap',
'../../../../typemap',
'../../../lib/ExtUtils/typemap',
'../../../typemap',
'../../lib/ExtUtils/typemap',
'../../typemap',
'../lib/ExtUtils/typemap',
'../typemap',
'typemap'
o Arguments
my @stl = standard_typemap_locations( \@INC );
Reference to @INC.
o Return Value
Array holding list of directories to be searched for typemap files.
"trim_whitespace()"
o Purpose
Perform an in-place trimming of leading and trailing whitespace
from the first argument provided to the function.
o Argument
trim_whitespace($arg);
o Return Value
None. Remember: this is an in-place modification of the argument.
"tidy_type()"
o Purpose
Rationalize any asterisks ("*") by joining them into bunches,
removing interior whitespace, then trimming leading and trailing
whitespace.
o Arguments
($ret_type) = tidy_type($_);
String to be cleaned up.
o Return Value
String cleaned up.
"C_string()"
o Purpose
Escape backslashes ("\") in prototype strings.
o Arguments
$ProtoThisXSUB = C_string($_);
String needing escaping.
o Return Value
Properly escaped string.
"valid_proto_string()"
o Purpose
Validate prototype string.
o Arguments
String needing checking.
o Return Value
Upon success, returns the same string passed as argument.
Upon failure, returns 0.
"process_typemaps()"
o Purpose
Process all typemap files.
o Arguments
my $typemaps_object = process_typemaps( $args{typemap}, $pwd );
List of two elements: "typemap" element from %args; current
working directory.
o Return Value
Upon success, returns an ExtUtils::Typemaps object.
"make_targetable()"
o Purpose
Populate %targetable. This constitutes a refinement of the output
of "process_typemaps()" with respect to its fourth output,
$output_expr_ref.
o Arguments
%targetable = make_targetable($output_expr_ref);
Single hash reference: the fourth such ref returned by
"process_typemaps()".
o Return Value
Hash.
"map_type()"
o Purpose
Performs a mapping at several places inside "PARAGRAPH" loop.
o Arguments
$type = map_type($self, $type, $varname);
List of three arguments.
o Return Value
String holding augmented version of second argument.
"standard_XS_defs()"
o Purpose
Writes to the ".c" output file certain preprocessor directives and
function headers needed in all such files.
o Arguments
None.
o Return Value
Returns true.
"assign_func_args()"
o Purpose
Perform assignment to the "func_args" attribute.
o Arguments
$string = assign_func_args($self, $argsref, $class);
List of three elements. Second is an array reference; third is a
string.
o Return Value
String.
"analyze_preprocessor_statements()"
o Purpose
Within each function inside each Xsub, print to the .c output file
certain preprocessor statements.
o Arguments
( $self, $XSS_work_idx, $BootCode_ref ) =
analyze_preprocessor_statements(
$self, $statement, $XSS_work_idx, $BootCode_ref
);
List of four elements.
o Return Value
Modifed values of three of the arguments passed to the function.
In particular, the "XSStack" and "InitFileCode" attributes are
modified.
"set_cond()"
o Purpose
o Arguments
o Return Value
"current_line_number()"
o Purpose
Figures out the current line number in the XS file.
o Arguments
$self
o Return Value
The current line number.
"Warn()"
o Purpose
o Arguments
o Return Value
"blurt()"
o Purpose
o Arguments
o Return Value
"death()"
o Purpose
o Arguments
o Return Value
"check_conditional_preprocessor_statements()"
o Purpose
o Arguments
o Return Value
"escape_file_for_line_directive()"
o Purpose
Escapes a given code source name (typically a file name but can
also be a command that was read from) so that double-quotes and
backslashes are escaped.
o Arguments
A string.
o Return Value
A string with escapes for double-quotes and backslashes.
"report_typemap_failure"
o Purpose
Do error reporting for missing typemaps.
o Arguments
The "ExtUtils::ParseXS" object.
An "ExtUtils::Typemaps" object.
The string that represents the C type that was not found in the
typemap.
Optionally, the string "death" or "blurt" to choose whether the
error is immediately fatal or not. Default: "blurt"
o Return Value
Returns nothing. Depending on the arguments, this may call "death"
or "blurt", the former of which is fatal.
perl v5.16.3 2017-08-02 ExtUtils::ParseXS::Utilities(3)
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