diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/README.md b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/README.md
new file mode 100644
index 000000000000..6ad850e013c3
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/README.md
@@ -0,0 +1,215 @@
+
+
+# Gamma Lanczos Sumf
+
+> Calculate the Lanczos sum for the approximation of the [gamma function][gamma-function].
+
+
+
+The [Lanczos approximation][lanczos-approximation] for the [gamma function][gamma-function] can be written in partial fraction form as follows:
+
+
+
+```math
+\Gamma ( n ) = \frac{(n+g-0.5)^{n-0.5}}{e^{n+g-0.5}} L_g(n)
+```
+
+
+
+
+
+where `g` is an [arbitrary constant][@stdlib/constants/float32/gamma-lanczos-g] and `L_g(n)` is the Lanczos sum.
+
+
+
+
+
+
+
+## Usage
+
+```javascript
+var gammaLanczosSumf = require( '@stdlib/math/base/special/gamma-lanczos-sumf' );
+```
+
+#### gammaLanczosSumf( x )
+
+Calculates the Lanczos sum for the approximation of the [gamma function][gamma-function] for single-precision floating-point number.
+
+```javascript
+var v = gammaLanczosSumf( 4.0 );
+// returns ~950.366
+
+v = gammaLanczosSumf( -1.5 );
+// returns ~1373366.245
+
+v = gammaLanczosSumf( -0.5 );
+// returns ~-699841.735
+
+v = gammaLanczosSumf( 0.5 );
+// returns ~96074.186
+
+v = gammaLanczosSumf( 0.0 );
+// returns Infinity
+
+v = gammaLanczosSumf( NaN );
+// returns NaN
+```
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var linspace = require( '@stdlib/array/base/linspace' );
+var gammaLanczosSumf = require( '@stdlib/math/base/special/gamma-lanczos-sumf' );
+
+var x = linspace( -10.0, 10.0, 100 );
+
+var i;
+for ( i = 0; i < x.length; i++ ) {
+ console.log( 'x: %d, f(x): %d', x[ i ], gammaLanczosSumf( x[ i ] ) );
+}
+```
+
+
+
+
+
+
+
+* * *
+
+
+
+## C APIs
+
+
+
+
+
+
+
+
+
+
+
+
+
+### Usage
+
+```c
+#include "stdlib/math/base/special/gamma_lanczos_sumf.h"
+```
+
+#### stdlib_base_gamma_lanczos_sumf( x )
+
+Calculates the Lanczos sum for the approximation of the [gamma function][gamma-function] for single-precision floating-point number.
+
+```c
+float out = stdlib_base_gamma_lanczos_sumf( 4.0f );
+// returns ~950.366f
+
+out = stdlib_base_gamma_lanczos_sumf( -1.5f );
+// returns ~1373366.245f
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] float` input value.
+
+```c
+float stdlib_base_gamma_lanczos_sumf( const float x );
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+### Examples
+
+```c
+#include "stdlib/math/base/special/gamma_lanczos_sumf.h"
+#include
+#include
+
+int main( void ) {
+ const float x[] = { 4.0f, -1.5f, -0.5f, 0.5f };
+
+ float y;
+ int i;
+ for ( i = 0; i < 4; i++ ) {
+ y = stdlib_base_gamma_lanczos_sumf( x[ i ] );
+ printf( "gamma_lanczos_sumf(%f) = %f\n", x[ i ], y );
+ }
+}
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+[@stdlib/constants/float32/gamma-lanczos-g]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/constants/float32/gamma-lanczos-g
+
+[gamma-function]: https://en.wikipedia.org/wiki/Gamma_function
+
+[lanczos-approximation]: https://en.wikipedia.org/wiki/Lanczos_approximation
+
+
+
+
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/benchmark.js b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/benchmark.js
new file mode 100644
index 000000000000..4b5dc8dc4c5f
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/benchmark.js
@@ -0,0 +1,52 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var pkg = require( './../package.json' ).name;
+var gammaLanczosSumf = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+ var x;
+ var y;
+ var i;
+
+ discreteUniform( 100, -50.0, 50.0 );
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ y = gammaLanczosSumf( x[ i % x.length ] );
+ if ( isnanf( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnanf( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/benchmark.native.js
new file mode 100644
index 000000000000..a8d8a6be94e4
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/benchmark.native.js
@@ -0,0 +1,61 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench' );
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var gammaLanczosSumf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+ 'skip': ( gammaLanczosSumf instanceof Error )
+};
+
+
+// MAIN //
+
+bench( pkg+'::native', opts, function benchmark( b ) {
+ var x;
+ var y;
+ var i;
+
+ discreteUniform( 100, -50.0, 50.0 );
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ y = gammaLanczosSumf( x[ i % x.length ] );
+ if ( isnanf( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnanf( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/c/native/Makefile b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/c/native/Makefile
new file mode 100644
index 000000000000..a4bd7b38fd74
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/c/native/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+ CC := $(C_COMPILER)
+else
+ CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+ -std=c99 \
+ -O3 \
+ -Wall \
+ -pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+ fPIC ?=
+else
+ fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := benchmark.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+ $(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled benchmarks.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+ $(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+ $(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/c/native/benchmark.c b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/c/native/benchmark.c
new file mode 100644
index 000000000000..9e301ec3a979
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/benchmark/c/native/benchmark.c
@@ -0,0 +1,133 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/math/base/special/gamma_lanczos_sumf.h"
+#include
+#include
+#include
+#include
+#include
+
+#define NAME "gamma_lanczos_sumf"
+#define ITERATIONS 1000000
+#define REPEATS 3
+
+/**
+* Prints the TAP version.
+*/
+static void print_version( void ) {
+ printf( "TAP version 13\n" );
+}
+
+/**
+* Prints the TAP summary.
+*
+* @param total total number of tests
+* @param passing total number of passing tests
+*/
+static void print_summary( int total, int passing ) {
+ printf( "#\n" );
+ printf( "1..%d\n", total ); // TAP plan
+ printf( "# total %d\n", total );
+ printf( "# pass %d\n", passing );
+ printf( "#\n" );
+ printf( "# ok\n" );
+}
+
+/**
+* Prints benchmarks results.
+*
+* @param elapsed elapsed time in seconds
+*/
+static void print_results( double elapsed ) {
+ double rate = (double)ITERATIONS / elapsed;
+ printf( " ---\n" );
+ printf( " iterations: %d\n", ITERATIONS );
+ printf( " elapsed: %0.9f\n", elapsed );
+ printf( " rate: %0.9f\n", rate );
+ printf( " ...\n" );
+}
+
+/**
+* Returns a clock time.
+*
+* @return clock time
+*/
+static double tic( void ) {
+ struct timeval now;
+ gettimeofday( &now, NULL );
+ return (double)now.tv_sec + (double)now.tv_usec / 1.0e6;
+}
+
+/**
+* Generates a random number on the interval [0,1).
+*
+* @return random number
+*/
+static float rand_float( void ) {
+ int r = rand();
+ return (float)r / ( (float)RAND_MAX + 1.0f );
+}
+
+/**
+* Runs a benchmark.
+*
+* @return elapsed time in seconds
+*/
+static double benchmark( void ) {
+ double elapsed;
+ float x;
+ float y;
+ double t;
+ int i;
+
+ t = tic();
+ for ( i = 0; i < ITERATIONS; i++ ) {
+ x = ( 100.0f * rand_float() ) - 50.0f;
+ y = stdlib_base_gamma_lanczos_sumf( x );
+ if ( y != y ) {
+ printf( "should not return NaN\n" );
+ break;
+ }
+ }
+ elapsed = tic() - t;
+ if ( y != y ) {
+ printf( "should not return NaN\n" );
+ }
+ return elapsed;
+}
+
+/**
+* Main execution sequence.
+*/
+int main( void ) {
+ double elapsed;
+ int i;
+
+ // Use the current time to seed the random number generator:
+ srand( time( NULL ) );
+
+ print_version();
+ for ( i = 0; i < REPEATS; i++ ) {
+ printf( "# c::native::%s\n", NAME );
+ elapsed = benchmark();
+ print_results( elapsed );
+ printf( "ok %d benchmark finished\n", i+1 );
+ }
+ print_summary( REPEATS, REPEATS );
+}
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/binding.gyp b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/binding.gyp
new file mode 100644
index 000000000000..68a1ca11d160
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/binding.gyp
@@ -0,0 +1,170 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A `.gyp` file for building a Node.js native add-on.
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+ # List of files to include in this file:
+ 'includes': [
+ './include.gypi',
+ ],
+
+ # Define variables to be used throughout the configuration for all targets:
+ 'variables': {
+ # Target name should match the add-on export name:
+ 'addon_target_name%': 'addon',
+
+ # Set variables based on the host OS:
+ 'conditions': [
+ [
+ 'OS=="win"',
+ {
+ # Define the object file suffix:
+ 'obj': 'obj',
+ },
+ {
+ # Define the object file suffix:
+ 'obj': 'o',
+ }
+ ], # end condition (OS=="win")
+ ], # end conditions
+ }, # end variables
+
+ # Define compile targets:
+ 'targets': [
+
+ # Target to generate an add-on:
+ {
+ # The target name should match the add-on export name:
+ 'target_name': '<(addon_target_name)',
+
+ # Define dependencies:
+ 'dependencies': [],
+
+ # Define directories which contain relevant include headers:
+ 'include_dirs': [
+ # Local include directory:
+ '<@(include_dirs)',
+ ],
+
+ # List of source files:
+ 'sources': [
+ '<@(src_files)',
+ ],
+
+ # Settings which should be applied when a target's object files are used as linker input:
+ 'link_settings': {
+ # Define libraries:
+ 'libraries': [
+ '<@(libraries)',
+ ],
+
+ # Define library directories:
+ 'library_dirs': [
+ '<@(library_dirs)',
+ ],
+ },
+
+ # C/C++ compiler flags:
+ 'cflags': [
+ # Enable commonly used warning options:
+ '-Wall',
+
+ # Aggressive optimization:
+ '-O3',
+ ],
+
+ # C specific compiler flags:
+ 'cflags_c': [
+ # Specify the C standard to which a program is expected to conform:
+ '-std=c99',
+ ],
+
+ # C++ specific compiler flags:
+ 'cflags_cpp': [
+ # Specify the C++ standard to which a program is expected to conform:
+ '-std=c++11',
+ ],
+
+ # Linker flags:
+ 'ldflags': [],
+
+ # Apply conditions based on the host OS:
+ 'conditions': [
+ [
+ 'OS=="mac"',
+ {
+ # Linker flags:
+ 'ldflags': [
+ '-undefined dynamic_lookup',
+ '-Wl,-no-pie',
+ '-Wl,-search_paths_first',
+ ],
+ },
+ ], # end condition (OS=="mac")
+ [
+ 'OS!="win"',
+ {
+ # C/C++ flags:
+ 'cflags': [
+ # Generate platform-independent code:
+ '-fPIC',
+ ],
+ },
+ ], # end condition (OS!="win")
+ ], # end conditions
+ }, # end target <(addon_target_name)
+
+ # Target to copy a generated add-on to a standard location:
+ {
+ 'target_name': 'copy_addon',
+
+ # Declare that the output of this target is not linked:
+ 'type': 'none',
+
+ # Define dependencies:
+ 'dependencies': [
+ # Require that the add-on be generated before building this target:
+ '<(addon_target_name)',
+ ],
+
+ # Define a list of actions:
+ 'actions': [
+ {
+ 'action_name': 'copy_addon',
+ 'message': 'Copying addon...',
+
+ # Explicitly list the inputs in the command-line invocation below:
+ 'inputs': [],
+
+ # Declare the expected outputs:
+ 'outputs': [
+ '<(addon_output_dir)/<(addon_target_name).node',
+ ],
+
+ # Define the command-line invocation:
+ 'action': [
+ 'cp',
+ '<(PRODUCT_DIR)/<(addon_target_name).node',
+ '<(addon_output_dir)/<(addon_target_name).node',
+ ],
+ },
+ ], # end actions
+ }, # end target copy_addon
+ ], # end targets
+}
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/img/equation_lanczos_approximation.svg b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/img/equation_lanczos_approximation.svg
new file mode 100644
index 000000000000..d17a91f6be6f
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/img/equation_lanczos_approximation.svg
@@ -0,0 +1,75 @@
+
\ No newline at end of file
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/repl.txt b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/repl.txt
new file mode 100644
index 000000000000..ab6b0f04394b
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/repl.txt
@@ -0,0 +1,33 @@
+
+{{alias}}( x )
+ Calculates the Lanczos sum for the approximation of the gamma function for
+ single-precision floating-point number.
+
+ Parameters
+ ----------
+ x: number
+ Input value.
+
+ Returns
+ -------
+ y: number
+ Lanczos sum.
+
+ Examples
+ --------
+ > var y = {{alias}}( 4.0 )
+ ~950.366
+ > y = {{alias}}( -1.5 )
+ ~1373366.245
+ > y = {{alias}}( -0.5 )
+ ~-699841.735
+ > y = {{alias}}( 0.5 )
+ ~96074.186
+ > y = {{alias}}( 0.0 )
+ Infinity
+ > y = {{alias}}( NaN )
+ NaN
+
+ See Also
+ --------
+
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/types/index.d.ts b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/types/index.d.ts
new file mode 100644
index 000000000000..7cc38d6705e7
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/types/index.d.ts
@@ -0,0 +1,56 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/**
+* Calculates the Lanczos sum approximation for single-precision floating-point number.
+*
+* @param x - input value
+* @returns Lanczos sum approximation
+*
+* @example
+* var v = gammaLanczosSum(f 4.0 );
+* // returns ~950.366
+*
+* @example
+* var v = gammaLanczosSumf( -1.5 );
+* // returns ~1373366.245
+*
+* @example
+* var v = gammaLanczosSumf( -0.5 );
+* // returns ~-699841.735
+*
+* @example
+* var v = gammaLanczosSumf( 0.5 );
+* // returns ~96074.186
+*
+* @example
+* var v = gammaLanczosSumf( 0.0 );
+* // returns Infinity
+*
+* @example
+* var v = gammaLanczosSumf( NaN );
+* // returns NaN
+*/
+declare function gammaLanczosSumf( x: number ): number;
+
+
+// EXPORTS //
+
+export = gammaLanczosSumf;
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/types/test.ts b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/types/test.ts
new file mode 100644
index 000000000000..92626bc8365b
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/docs/types/test.ts
@@ -0,0 +1,44 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import gammaLanczosSumf = require( './index' );
+
+
+// TESTS //
+
+// The function returns a number...
+{
+ gammaLanczosSumf( 8 ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided a value other than a number...
+{
+ gammaLanczosSumf( true ); // $ExpectError
+ gammaLanczosSumf( false ); // $ExpectError
+ gammaLanczosSumf( null ); // $ExpectError
+ gammaLanczosSumf( undefined ); // $ExpectError
+ gammaLanczosSumf( '5' ); // $ExpectError
+ gammaLanczosSumf( [] ); // $ExpectError
+ gammaLanczosSumf( {} ); // $ExpectError
+ gammaLanczosSumf( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided insufficient arguments...
+{
+ gammaLanczosSumf(); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/examples/c/Makefile b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/examples/c/Makefile
new file mode 100644
index 000000000000..25ced822f96a
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/examples/c/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+ CC := $(C_COMPILER)
+else
+ CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+ -std=c99 \
+ -O3 \
+ -Wall \
+ -pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+ fPIC ?=
+else
+ fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := example.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+ $(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled examples.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+ $(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+ $(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/examples/c/example.c b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/examples/c/example.c
new file mode 100644
index 000000000000..a711cf4fdc6c
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/examples/c/example.c
@@ -0,0 +1,31 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/math/base/special/gamma_lanczos_sumf.h"
+#include
+
+int main( void ) {
+ const float x[] = { 4.0f, -1.5f, -0.5f, 0.5f };
+
+ float y;
+ int i;
+ for ( i = 0; i < 4; i++ ) {
+ y = stdlib_base_gamma_lanczos_sumf( x[ i ] );
+ printf( "gamma_lanczos_sumf(%f) = %f\n", x[ i ], y );
+ }
+}
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/examples/index.js b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/examples/index.js
new file mode 100644
index 000000000000..e081b75032cd
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/examples/index.js
@@ -0,0 +1,29 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var linspace = require( '@stdlib/array/base/linspace' );
+var gammaLanczosSumf = require( './../lib' );
+
+var x = linspace( -10.0, 10.0, 100 );
+
+var i;
+for ( i = 0; i < x.length; i++ ) {
+ console.log( 'x: %d, f(x): %d', x[ i ], gammaLanczosSumf( x[ i ] ) );
+}
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/include.gypi b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/include.gypi
new file mode 100644
index 000000000000..ecfaf82a3279
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/include.gypi
@@ -0,0 +1,53 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A GYP include file for building a Node.js native add-on.
+#
+# Main documentation:
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+ # Define variables to be used throughout the configuration for all targets:
+ 'variables': {
+ # Source directory:
+ 'src_dir': './src',
+
+ # Include directories:
+ 'include_dirs': [
+ '=0.10.0",
+ "npm": ">2.7.0"
+ },
+ "os": [
+ "aix",
+ "darwin",
+ "freebsd",
+ "linux",
+ "macos",
+ "openbsd",
+ "sunos",
+ "win32",
+ "windows"
+ ],
+ "keywords": [
+ "stdlib",
+ "stdmath",
+ "mathematics",
+ "math",
+ "special function",
+ "special",
+ "function",
+ "gamma",
+ "lanczos",
+ "approx",
+ "approximation",
+ "polynomial",
+ "rational",
+ "factorial",
+ "number"
+ ]
+}
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/scripts/evalrational.js b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/scripts/evalrational.js
new file mode 100644
index 000000000000..c36ea598ba16
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/scripts/evalrational.js
@@ -0,0 +1,130 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/*
+* This script compiles modules for evaluating polynomial functions. If any polynomial coefficients change, this script should be rerun to update the compiled files.
+*/
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var readFileSync = require( '@stdlib/fs/read-file' ).sync;
+var writeFileSync = require( '@stdlib/fs/write-file' ).sync;
+var currentYear = require( '@stdlib/time/current-year' );
+var licenseHeader = require( '@stdlib/_tools/licenses/header' );
+var compile = require( '@stdlib/math/base/tools/evalrational-compile' );
+var compileC = require( '@stdlib/math/base/tools/evalrational-compile-c' );
+var substringBefore = require( '@stdlib/string/substring-before' );
+var substringAfter = require( '@stdlib/string/substring-after' );
+var format = require( '@stdlib/string/format' );
+
+
+// VARIABLES //
+
+// Polynomial coefficients ordered in ascending degree...
+var P = [
+ 58.52061591769095910314047740215847630266,
+ 182.5248962595894264831189414768236280862,
+ 211.0971093028510041839168287718170827259,
+ 112.2526547883668146736465390902227161763,
+ 27.5192015197455403062503721613097825345,
+ 2.50662858515256974113978724717473206342
+];
+var Q = [
+ 0.0,
+ 24.0,
+ 50.0,
+ 35.0,
+ 10.0,
+ 1.0
+];
+
+// Header to add to output files:
+var header = licenseHeader( 'Apache-2.0', 'js', {
+ 'year': currentYear(),
+ 'copyright': 'The Stdlib Authors'
+});
+header += '\n/* This is a generated file. Do not edit directly. */\n';
+
+
+// FUNCTIONS //
+
+/**
+* Inserts a compiled function into file content.
+*
+* @private
+* @param {string} text - source content
+* @param {string} id - function identifier
+* @param {string} str - function string
+* @returns {string} updated content
+*/
+function insert( text, id, str ) {
+ var before;
+ var after;
+ var begin;
+ var end;
+
+ begin = '// BEGIN: '+id;
+ end = '// END: '+id;
+
+ before = substringBefore( text, begin );
+ after = substringAfter( text, end );
+
+ return format( '%s// BEGIN: %s\n\n%s\n%s%s', before, id, str, end, after );
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+ var fpath;
+ var copts;
+ var opts;
+ var file;
+ var str;
+
+ opts = {
+ 'encoding': 'utf8'
+ };
+
+ fpath = resolve( __dirname, '..', 'lib', 'rational_pq.js' );
+ str = header + compile( P, Q );
+ writeFileSync( fpath, str, opts );
+
+ copts = {
+ 'dtype': 'float',
+ 'name': 'rational_pq'
+ };
+
+ fpath = resolve( __dirname, '..', 'src', 'main.c' );
+ file = readFileSync( fpath, opts );
+
+ copts.name = 'rational_pq';
+ str = compileC( P, Q, copts );
+ file = insert( file, copts.name, str );
+
+ writeFileSync( fpath, file, opts );
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/src/Makefile b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/src/Makefile
new file mode 100644
index 000000000000..7733b6180cb4
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/src/Makefile
@@ -0,0 +1,70 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+
+# RULES #
+
+#/
+# Removes generated files for building an add-on.
+#
+# @example
+# make clean-addon
+#/
+clean-addon:
+ $(QUIET) -rm -f *.o *.node
+
+.PHONY: clean-addon
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean: clean-addon
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/src/addon.c b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/src/addon.c
new file mode 100644
index 000000000000..871316287da3
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/src/addon.c
@@ -0,0 +1,23 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/math/base/special/gamma_lanczos_sumf.h"
+#include "stdlib/math/base/napi/unary.h"
+
+// cppcheck-suppress shadowFunction
+STDLIB_MATH_BASE_NAPI_MODULE_F_F( stdlib_base_gamma_lanczos_sumf )
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/src/main.c b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/src/main.c
new file mode 100644
index 000000000000..efce3877742a
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/src/main.c
@@ -0,0 +1,74 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/math/base/special/gamma_lanczos_sumf.h"
+
+// BEGIN: rational_pq
+
+/**
+* Evaluates a rational function (i.e., the ratio of two polynomials described by the coefficients stored in \\(P\\) and \\(Q\\)).
+*
+* ## Notes
+*
+* - Coefficients should be sorted in ascending degree.
+* - The implementation uses [Horner's rule][horners-method] for efficient computation.
+*
+* [horners-method]: https://en.wikipedia.org/wiki/Horner%27s_method
+*
+* @param x value at which to evaluate the rational function
+* @return evaluated rational function
+*/
+static float rational_pq( const float x ) {
+ float ax;
+ float ix;
+ float s1;
+ float s2;
+ if ( x == 0.0f ) {
+ return 1.0f / 0.0f;
+ }
+ if ( x < 0.0f ) {
+ ax = -x;
+ } else {
+ ax = x;
+ }
+ if ( ax <= 1.0f ) {
+ s1 = 58.52061591769096f + (x * (182.52489625958944f + (x * (211.097109302851f + (x * (112.25265478836681f + (x * (27.51920151974554f + (x * 2.5066285851525696f)))))))));
+ s2 = 0.0f + (x * (24.0f + (x * (50.0f + (x * (35.0f + (x * (10.0f + (x * 1.0f)))))))));
+ } else {
+ ix = 1.0f / x;
+ s1 = 2.5066285851525696f + (ix * (27.51920151974554f + (ix * (112.25265478836681f + (ix * (211.097109302851f + (ix * (182.52489625958944f + (ix * 58.52061591769096f)))))))));
+ s2 = 1.0f + (ix * (10.0f + (ix * (35.0f + (ix * (50.0f + (ix * (24.0f + (ix * 0.0f)))))))));
+ }
+ return s1 / s2;
+}
+
+// END: rational_pq
+
+/**
+* Calculates the Lanczos sum for the approximation of the gamma function for single-precision floating-point number.
+*
+* @param x input value
+* @return Lanczos sum approximation
+*
+* @example
+* float v = stdlib_base_gammaLanczosSum( 4.0f );
+* // returns ~950.366f
+*/
+float stdlib_base_gamma_lanczos_sumf( const float x ) {
+ return rational_pq( x );
+}
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/test/test.js b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/test/test.js
new file mode 100644
index 000000000000..debe1283a223
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/test/test.js
@@ -0,0 +1,72 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var linspace = require( '@stdlib/array/base/linspace' );
+var isnanf = require( '@stdlib/math/base/assert/is-nan' );
+var gamma = require( '@stdlib/math/base/special/gamma' );
+var absf = require( '@stdlib/math/base/special/absf' );
+var exp = require( '@stdlib/math/base/special/exp' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
+var EPS = require( '@stdlib/constants/float32/eps' );
+var G = require( '@stdlib/constants/float32/gamma-lanczos-g' );
+var gammaLanczosSumf = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof gammaLanczosSumf, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'if provided `NaN`, the function returns `NaN`', function test( t ) {
+ var v = gammaLanczosSumf( NaN );
+ t.equal( isnanf( v ), true, 'returns NaN when provided a NaN' );
+ t.end();
+});
+
+tape( 'the function evaluates the Lanczos sum', function test( t ) {
+ var expected;
+ var delta;
+ var tol;
+ var i;
+ var x;
+ var y;
+
+ x = linspace( 1.0, 100.0, 500 );
+ for ( i = 0; i < x.length; i++ ) {
+ y = gammaLanczosSumf( x[i] );
+ expected = float64ToFloat32( gamma( float64ToFloat32( x[i] ) ) );
+ expected /= float64ToFloat32( float64ToFloat32( pow( float64ToFloat32( x[i]+G-0.5 ), float64ToFloat32( x[i]-0.5 ) ) / float64ToFloat32( exp( float64ToFloat32( x[i]+G-0.5 ) ) ) ) );
+ if ( y === expected ) {
+ t.equal( y, expected, 'x: '+x[i]+', y: '+y+', expected: '+expected );
+ } else {
+ delta = absf( y - expected );
+ tol = 10.0 * EPS * absf( expected );
+ t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected+'. Δ: '+delta+'. tol: '+tol );
+ }
+ }
+ t.end();
+});
diff --git a/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/test/test.native.js b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/test/test.native.js
new file mode 100644
index 000000000000..faf8edb7bcdd
--- /dev/null
+++ b/lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sumf/test/test.native.js
@@ -0,0 +1,80 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var tape = require( 'tape' );
+var linspace = require( '@stdlib/array/base/linspace' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var gamma = require( '@stdlib/math/base/special/gamma' );
+var absf = require( '@stdlib/math/base/special/absf' );
+var exp = require( '@stdlib/math/base/special/exp' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var EPS = require( '@stdlib/constants/float32/eps' );
+var G = require( '@stdlib/constants/float32/gamma-lanczos-g' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+
+
+// VARIABLES //
+
+var gammaLanczosSumf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+ 'skip': ( gammaLanczosSumf instanceof Error )
+};
+
+
+// TESTS //
+
+tape( 'main export is a function', opts, function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof gammaLanczosSumf, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'if provided `NaN`, the function returns `NaN`', opts, function test( t ) {
+ var v = gammaLanczosSumf( NaN );
+ t.equal( isnanf( v ), true, 'returns NaN when provided a NaN' );
+ t.end();
+});
+
+tape( 'the function evaluates the Lanczos sum', opts, function test( t ) {
+ var expected;
+ var delta;
+ var tol;
+ var i;
+ var x;
+ var y;
+
+ x = linspace( 1.0, 100.0, 500 );
+ for ( i = 0; i < x.length; i++ ) {
+ y = gammaLanczosSumf( x[i] );
+ expected = float64ToFloat32( gamma( x[i] ) );
+ expected /= float64ToFloat32( float64ToFloat32( pow( x[i]+G-0.5, x[i]-0.5 ) ) / float64ToFloat32( exp( x[i]+G-0.5 ) ) ); // eslint-disable-line max-len
+ if ( y === expected ) {
+ t.equal( y, expected, 'x: '+x[i]+', y: '+y+', expected: '+expected );
+ } else {
+ delta = absf( y - expected );
+ tol = 10.0 * EPS * absf( expected );
+ t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected+'. Δ: '+delta+'. tol: '+tol );
+ }
+ }
+ t.end();
+});