diff --git a/lib/node_modules/@stdlib/math/base/special/log10/README.md b/lib/node_modules/@stdlib/math/base/special/log10/README.md index f8f9f577e3e4..547a7a08c534 100644 --- a/lib/node_modules/@stdlib/math/base/special/log10/README.md +++ b/lib/node_modules/@stdlib/math/base/special/log10/README.md @@ -107,6 +107,96 @@ for ( i = 0; i < 100; i++ ) { + + +* * * + +
+ +## C APIs + + + +
+ +
+ + + + + +
+ +### Usage + +```c +#include "stdlib/math/base/special/log10.h" +``` + +#### stdlib_base_log10( x ) + +Evaluates the [common logarithm][common-logarithm]. + +```c +double out = stdlib_base_log10( 100.0 ); +// returns 2.0 + +out = stdlib_base_log10( 8.0 ); +// returns ~0.903 +``` + +The function accepts the following arguments: + +- **x**: `[in] double` input value. + +```c +double stdlib_base_log10( const double x ); +``` + +
+ + + + + +
+ +
+ + + + + +
+ +### Examples + +```c +#include "stdlib/math/base/special/log10.h" +#include +#include + +int main() { + double x; + double v; + int i; + + for ( i = 0; i < 100; i++ ) { + x = ( (double)rand() / (double)RAND_MAX ) * 100.0; + v = stdlib_base_log10( x ); + printf( "log10(%lf) = %lf\n", x, v ); + } +} +``` + +
+ + + +
+ + +
diff --git a/lib/node_modules/@stdlib/math/base/special/log10/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/math/base/special/log10/benchmark/benchmark.native.js new file mode 100644 index 000000000000..8818b8d85d54 --- /dev/null +++ b/lib/node_modules/@stdlib/math/base/special/log10/benchmark/benchmark.native.js @@ -0,0 +1,60 @@ +/** +* @license Apache-2.0 +* +* Copyright (c) 2022 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 randu = require( '@stdlib/random/base/randu' ); +var isnan = require( '@stdlib/math/base/assert/is-nan' ); +var tryRequire = require( '@stdlib/utils/try-require' ); +var pkg = require( './../package.json' ).name; + + +// VARIABLES // + +var log10 = tryRequire( resolve( __dirname, './../lib/native.js' ) ); +var opts = { + 'skip': ( log10 instanceof Error ) +}; + + +// MAIN // + +bench( pkg+'::native', opts, function benchmark( b ) { + var x; + var y; + var i; + + b.tic(); + for ( i = 0; i < b.iterations; i++ ) { + x = ( randu()*1000.0 ) - 0.0; + y = log10( x ); + if ( isnan( y ) ) { + b.fail( 'should not return NaN' ); + } + } + b.toc(); + if ( isnan( y ) ) { + b.fail( 'should not return NaN' ); + } + b.pass( 'benchmark finished' ); + b.end(); +}); diff --git a/lib/node_modules/@stdlib/math/base/special/log10/benchmark/c/native/Makefile b/lib/node_modules/@stdlib/math/base/special/log10/benchmark/c/native/Makefile new file mode 100644 index 000000000000..d6b58c7f5d3e --- /dev/null +++ b/lib/node_modules/@stdlib/math/base/special/log10/benchmark/c/native/Makefile @@ -0,0 +1,146 @@ +#/ +# @license Apache-2.0 +# +# Copyright (c) 2022 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/log10/benchmark/c/native/benchmark.c b/lib/node_modules/@stdlib/math/base/special/log10/benchmark/c/native/benchmark.c new file mode 100644 index 000000000000..66f92c35aa10 --- /dev/null +++ b/lib/node_modules/@stdlib/math/base/special/log10/benchmark/c/native/benchmark.c @@ -0,0 +1,136 @@ +/** +* @license Apache-2.0 +* +* Copyright (c) 2022 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. +*/ + +/** +* Benchmark `log10`. +*/ +#include "stdlib/math/base/special/log10.h" +#include +#include +#include +#include +#include + +#define NAME "log10" +#define ITERATIONS 1000000 +#define REPEATS 3 + +/** +* Prints the TAP version. +*/ +void print_version() { + printf( "TAP version 13\n" ); +} + +/** +* Prints the TAP summary. +* +* @param total total number of tests +* @param passing total number of passing tests +*/ +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 +*/ +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 +*/ +double tic() { + 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 +*/ +double rand_double() { + int r = rand(); + return (double)r / ( (double)RAND_MAX + 1.0 ); +} + +/** +* Runs a benchmark. +* +* @return elapsed time in seconds +*/ +double benchmark() { + double elapsed; + double x; + double y; + double t; + int i; + + t = tic(); + for ( i = 0; i < ITERATIONS; i++ ) { + x = ( 1000.0*rand_double() ) - 0.0; + y = stdlib_base_log10( 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/log10/binding.gyp b/lib/node_modules/@stdlib/math/base/special/log10/binding.gyp new file mode 100644 index 000000000000..1058b57bab16 --- /dev/null +++ b/lib/node_modules/@stdlib/math/base/special/log10/binding.gyp @@ -0,0 +1,170 @@ +# @license Apache-2.0 +# +# Copyright (c) 2022 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/log10/examples/c/Makefile b/lib/node_modules/@stdlib/math/base/special/log10/examples/c/Makefile new file mode 100644 index 000000000000..91d364d19fc3 --- /dev/null +++ b/lib/node_modules/@stdlib/math/base/special/log10/examples/c/Makefile @@ -0,0 +1,146 @@ +#/ +# @license Apache-2.0 +# +# Copyright (c) 2022 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/log10/examples/c/example.c b/lib/node_modules/@stdlib/math/base/special/log10/examples/c/example.c new file mode 100644 index 000000000000..0a70bbbe0e1f --- /dev/null +++ b/lib/node_modules/@stdlib/math/base/special/log10/examples/c/example.c @@ -0,0 +1,33 @@ +/** +* @license Apache-2.0 +* +* Copyright (c) 2022 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/log10.h" +#include +#include + +int main() { + double x; + double v; + int i; + + for ( i = 0; i < 100; i++ ) { + x = ( (double)rand() / (double)RAND_MAX ) * 100.0; + v = stdlib_base_log10( x ); + printf( "log10(%lf) = %lf\n", x, v ); + } +} diff --git a/lib/node_modules/@stdlib/math/base/special/log10/include.gypi b/lib/node_modules/@stdlib/math/base/special/log10/include.gypi new file mode 100644 index 000000000000..3b437d524797 --- /dev/null +++ b/lib/node_modules/@stdlib/math/base/special/log10/include.gypi @@ -0,0 +1,53 @@ +# @license Apache-2.0 +# +# Copyright (c) 2022 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 11111111111 00000000000000000000 => biased exponent: 2047 = 1023+1023 => 2^1023 +static const int32_t HIGH_MAX_NORMAL_EXP = 0x7ff00000; + +// 0x00100000 = 1048576 => 0 00000000001 00000000000000000000 => biased exponent: 1 = -1022+1023 => 2^-1022 +static const int32_t HIGH_MIN_NORMAL_EXP = 0x00100000; + +// 0x3ff00000 = 1072693248 => 0 01111111111 00000000000000000000 => biased exponent: 1023 = 0+1023 => 2^0 = 1 +static const int32_t HIGH_BIASED_EXP_0 = 0x3ff00000; + +// 1/3 +static const double ONE_THIRD = 0.33333333333333333; + +/* Begin auto-generated functions. The following functions are auto-generated. Do not edit directly. */ + +// BEGIN: polyval_p + +/** +* Evaluates a polynomial. +* +* ## Notes +* +* - 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 polynomial +* @return evaluated polynomial +*/ +static double polyval_p( const double x ) { + return 0.3999999999940942 + (x * (0.22222198432149784 + (x * 0.15313837699209373))); +} + +// END: polyval_p + +// BEGIN: polyval_q + +/** +* Evaluates a polynomial. +* +* ## Notes +* +* - 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 polynomial +* @return evaluated polynomial +*/ +static double polyval_q( const double x ) { + return 0.6666666666666735 + (x * (0.2857142874366239 + (x * (0.1818357216161805 + (x * 0.14798198605116586))))); +} + +// END: polyval_q + +/* End auto-generated functions. */ + +/** +* Return `log(x) - (x-1)` for `x` in `~[sqrt(2)/2, sqrt(2)]`. +* +* @param {number} x - input value +* @returns {number} function value +*/ +static double klog( const double x ) { + double hfsq; + uint32_t hx; + int32_t ihx; + int32_t i; + int32_t j; + double t1; + double t2; + double f; + double s; + double z; + double R; + double w; + + stdlib_base_float64_get_high_word( x, &hx ); + ihx = (int32_t)hx; + f = x - 1.0; + if ( ( STDLIB_CONSTANT_FLOAT64_HIGH_WORD_SIGNIFICAND_MASK & ( 2 + ihx ) ) < 3 ) { + // Case: -2**-20 <= f < 2**-20 + if ( f == 0.0 ) { + return 0.0; + } + return f * f * ( ( ONE_THIRD * f ) - 0.5 ); + } + s = f / ( 2.0 + f ); + z = s * s; + ihx &= STDLIB_CONSTANT_FLOAT64_HIGH_WORD_SIGNIFICAND_MASK; + i = (ihx - 0x6147a); + w = z * z; + j = ( 0x6b851 - ihx ); + t1 = w * polyval_p( w ); + t2 = z * polyval_q( w ); + i |= j; + R = t2 + t1; + if ( i > 0 ) { + hfsq = 0.5 * f * f; + return ( s * ( hfsq + R ) ) - hfsq; + } + return s * ( R - f ); +} + +/** +* Evaluates the common logarithm (base ten). +* +* @param x input value +* @return output value +* +* @example +* double out = stdlib_base_log10( 4.0 ); +* // returns ~0.602 +*/ +double stdlib_base_log10( const double x ) { + int32_t ihx; + int32_t ilx; + uint32_t hx; + uint32_t lx; + int32_t i; + int32_t k; + double xc; + double hi; + double lo; + double f; + double y; + double z; + + xc = x; + stdlib_base_float64_to_words( x, &hx, &lx ); + ihx = (int32_t)hx; + ilx = (int32_t)lx; + k = 0; + + // Case: 0 < x < 2**-1022 + if ( ihx < HIGH_MIN_NORMAL_EXP ) { + if ( ( ( ihx & STDLIB_CONSTANT_FLOAT64_HIGH_WORD_ABS_MASK ) | ilx ) == 0 ) { + return STDLIB_CONSTANT_FLOAT64_NINF; + } + if ( ihx < 0 ) { + return 0.0 / 0.0; // NaN + } + // Subnormal number, scale up `x`... + k -= 54; + xc *= TWO54; + stdlib_base_float64_get_high_word( xc, &hx ); + ihx = (int32_t)hx; + } + if ( ihx >= HIGH_MAX_NORMAL_EXP ) { + return x + x; + } + k += ( ( ihx>>20 ) - STDLIB_CONSTANT_FLOAT64_EXPONENT_BIAS ); + ihx &= STDLIB_CONSTANT_FLOAT64_HIGH_WORD_SIGNIFICAND_MASK; + i = ( ihx + 0x95f64 ) & 0x100000; + + // Normalize `x` or `x/2`... + stdlib_base_float64_set_high_word( ihx | ( i ^ HIGH_BIASED_EXP_0 ), &xc ); + k += i >> 20; + y = (double)k; + f = klog( xc ); + xc -= 1.0; + hi = xc; + stdlib_base_float64_set_low_word( 0, &hi ); + lo = xc - hi; + z = ( y * LOG10_2LO ) + ( ( xc + f ) * IVLN10LO ); + z += ( ( lo + f ) * IVLN10HI ) + ( hi * IVLN10HI ); + return z + ( y * LOG10_2HI ); +} diff --git a/lib/node_modules/@stdlib/math/base/special/log10/test/test.native.js b/lib/node_modules/@stdlib/math/base/special/log10/test/test.native.js new file mode 100644 index 000000000000..cb3b02afd26d --- /dev/null +++ b/lib/node_modules/@stdlib/math/base/special/log10/test/test.native.js @@ -0,0 +1,235 @@ +/** +* @license Apache-2.0 +* +* Copyright (c) 2022 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 isnan = require( '@stdlib/math/base/assert/is-nan' ); +var PINF = require( '@stdlib/constants/float64/pinf' ); +var NINF = require( '@stdlib/constants/float64/ninf' ); +var tryRequire = require( '@stdlib/utils/try-require' ); +var EPS = require( '@stdlib/constants/float64/eps' ); +var abs = require( '@stdlib/math/base/special/abs' ); + + +// FIXTURES // + +var veryLargePositive = require( './fixtures/julia/very_large_positive.json' ); +var largePositive = require( './fixtures/julia/large_positive.json' ); +var mediumPositive = require( './fixtures/julia/medium_positive.json' ); +var smallPositive = require( './fixtures/julia/small_positive.json' ); +var smaller = require( './fixtures/julia/smaller.json' ); +var tinyPositive = require( './fixtures/julia/tiny_positive.json' ); +var subnormal = require( './fixtures/julia/subnormal.json' ); + + +// VARIABLES // + +var log10 = tryRequire( resolve( __dirname, './../lib/native.js' ) ); +var opts = { + 'skip': ( log10 instanceof Error ) +}; + + +// TESTS // + +tape( 'main export is a function', opts, function test( t ) { + t.ok( true, __filename ); + t.equal( typeof log10, 'function', 'main export is a function' ); + t.end(); +}); + +tape( 'the function evaluates the common logarithm of `x` (very large positive values)', opts, function test( t ) { + var expected; + var delta; + var tol; + var x; + var y; + var i; + + expected = veryLargePositive.expected; + x = veryLargePositive.x; + for ( i = 0; i < x.length; i++ ) { + y = log10( x[i] ); + if ( y === expected[i] ) { + t.equal( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] ); + } else { + delta = abs( y - expected[i] ); + tol = EPS * abs( expected[i] ); + t.equal( delta <= tol, true, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. Tolerance: '+tol+'.' ); + } + } + t.end(); +}); + +tape( 'the function evaluates the common logarithm of `x` (large positive values)', opts, function test( t ) { + var expected; + var delta; + var tol; + var x; + var y; + var i; + + expected = largePositive.expected; + x = largePositive.x; + for ( i = 0; i < x.length; i++ ) { + y = log10( x[i] ); + if ( y === expected[i] ) { + t.equal( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] ); + } else { + delta = abs( y - expected[i] ); + tol = EPS * abs( expected[i] ); + t.equal( delta <= tol, true, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. Tolerance: '+tol+'.' ); + } + } + t.end(); +}); + +tape( 'the function evaluates the common logarithm of `x` (medium positive values)', opts, function test( t ) { + var expected; + var delta; + var tol; + var x; + var y; + var i; + + expected = mediumPositive.expected; + x = mediumPositive.x; + for ( i = 0; i < x.length; i++ ) { + y = log10( x[i] ); + if ( y === expected[i] ) { + t.equal( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] ); + } else { + delta = abs( y - expected[i] ); + tol = EPS * abs( expected[i] ); + t.equal( delta <= tol, true, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. Tolerance: '+tol+'.' ); + } + } + t.end(); +}); + +tape( 'the function evaluates the common logarithm of `x` (small positive values)', opts, function test( t ) { + var expected; + var delta; + var tol; + var x; + var y; + var i; + + expected = smallPositive.expected; + x = smallPositive.x; + for ( i = 0; i < x.length; i++ ) { + y = log10( x[i] ); + if ( y === expected[i] ) { + t.equal( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] ); + } else { + delta = abs( y - expected[i] ); + tol = EPS * abs( expected[i] ); + t.equal( delta <= tol, true, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. Tolerance: '+tol+'.' ); + } + } + t.end(); +}); + +tape( 'the function evaluates the common logarithm of `x` (smaller values)', opts, function test( t ) { + var expected; + var delta; + var tol; + var x; + var y; + var i; + + expected = smaller.expected; + x = smaller.x; + for ( i = 0; i < x.length; i++ ) { + y = log10( x[i] ); + if ( y === expected[i] ) { + t.equal( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] ); + } else { + delta = abs( y - expected[i] ); + tol = EPS * abs( expected[i] ); + t.equal( delta <= tol, true, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. Tolerance: '+tol+'.' ); + } + } + t.end(); +}); + +tape( 'the function evaluates the common logarithm of `x` (tiny positive values)', opts, function test( t ) { + var expected; + var delta; + var tol; + var x; + var y; + var i; + + expected = tinyPositive.expected; + x = tinyPositive.x; + for ( i = 0; i < x.length; i++ ) { + y = log10( x[i] ); + if ( y === expected[i] ) { + t.equal( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] ); + } else { + delta = abs( y - expected[i] ); + tol = EPS * abs( expected[i] ); + t.equal( delta <= tol, true, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. Tolerance: '+tol+'.' ); + } + } + t.end(); +}); + +tape( 'the function evaluates the common logarithm of `x` (subnormal values)', opts, function test( t ) { + var expected; + var delta; + var tol; + var x; + var y; + var i; + + expected = subnormal.expected; + x = subnormal.x; + for ( i = 0; i < x.length; i++ ) { + y = log10( x[i] ); + if ( y === expected[i] ) { + t.equal( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] ); + } else { + delta = abs( y - expected[i] ); + tol = EPS * abs( expected[i] ); + t.equal( delta <= tol, true, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. Tolerance: '+tol+'.' ); + } + } + t.end(); +}); + +tape( 'the function returns `-infinity` if provided `0`', opts, function test( t ) { + t.equal( log10( 0.0 ), NINF, 'equals -infinity' ); + t.end(); +}); + +tape( 'the function returns `+infinity` if provided `+infinity`', opts, function test( t ) { + t.equal( log10( PINF ), PINF, 'equals +infinity' ); + t.end(); +}); + +tape( 'the function returns `NaN` if provided a negative number', opts, function test( t ) { + var v = log10( -1.0 ); + t.equal( isnan( v ), true, 'returns NaN' ); + t.end(); +});