Add native vector_lenght() function which calculates the euclidean distance 80%

faster. See https://github.com/matiasdelellis/pdlib/pull/2.

Increase the version to 1.0.2 since this is a required function for our
application and we must control it.

Add more compilation info in php-info(), and print a final message with the
build options when configure.

Fix that when dlib is not installed, the configuration returns that it cannot
find pkgconfig. See https://github.com/matiasdelellis/facerecognition/issues/261

Also implement the test on travis. See for example:
(https://travis-ci.com/github/matiasdelellis/pdlib/builds/161854044)

.travis.yml

@@ -0,0 +1,28 @@
+dist: bionic
+
+sudo: false
+
+language: php
+
+php:
+  - 7.1
+  - 7.2
+  - 7.3
+  - 7.4
+
+before_install:
+  - sudo sh -c 'echo "deb https://repo.delellis.com.ar bionic bionic" > /etc/apt/sources.list.d/20-pdlib.list'
+  - wget -qO - https://repo.delellis.com.ar/repo.gpg.key | sudo apt-key add -
+  - sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 762E3157
+  - sudo apt update
+  - sudo apt-get install libdlib-dev
+  - phpize
+  - ./configure --enable-debug
+  - make
+  - sudo make install
+  - echo "extension=pdlib.so" >> `php --ini | grep "Loaded Configuration" | sed -e "s|.*:\s*||"`
+
+script:
+  - export TEST_PHP_EXECUTABLE=`which php`
+  - export NO_INTERACTION=1
+  - php run-tests.php -q --show-diff

config.m4

@@ -1,10 +1,3 @@
-dnl $Id$
-dnl config.m4 for extension pdlib
-
-dnl Comments in this file start with the string 'dnl'.
-dnl Remove where necessary. This file will not work
-dnl without editing.
-
 if test -z "$PHP_DEBUG"; then
     AC_ARG_ENABLE(debug,
     [   --enable-debug          compile with debugging symbols],[
@@ -27,26 +20,49 @@ if test "$PHP_PDLIB" != "no"; then
   src/face_detection.cc \
   src/face_landmark_detection.cc \
   src/face_recognition.cc \
-  src/cnn_face_detection.cc "
+  src/cnn_face_detection.cc
+  src/vector.cc"
 
   AC_MSG_CHECKING(for pkg-config)
   AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
-
+  if test -x "$PKG_CONFIG"; then
-  if test -x "$PKG_CONFIG" && $PKG_CONFIG --exists dlib-1; then
+    AC_MSG_RESULT(found)
-     if $PKG_CONFIG dlib-1 --atleast-version 19.00; then
+    AC_MSG_CHECKING(for dlib-1)
+    if $PKG_CONFIG --exists dlib-1; then
+      if $PKG_CONFIG dlib-1 --atleast-version 19.00; then
         LIBDLIB_CFLAGS=`$PKG_CONFIG dlib-1 --cflags`
         LIBDLIB_LIBDIR=`$PKG_CONFIG dlib-1 --libs`
         LIBDLIB_VERSON=`$PKG_CONFIG dlib-1 --modversion`
         AC_MSG_RESULT(from pkgconfig: dlib version $LIBDLIB_VERSON)
-     else
+      else
         AC_MSG_ERROR(system dlib is too old: version 19.00 required)
-     fi
+      fi
+    else
+      AC_MSG_ERROR(dlib-1 not found)
+    fi
   else
      AC_MSG_ERROR(pkg-config not found)
   fi
+
   PHP_EVAL_LIBLINE($LIBDLIB_LIBDIR, PDLIB_SHARED_LIBADD)
   PHP_EVAL_INCLINE($LIBDLIB_CFLAGS)
 
   dnl using C++11
   PHP_NEW_EXTENSION(pdlib, $pdlib_src_files, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -std=c++11, cxx)
 fi
+
+AC_CONFIG_COMMANDS_POST([
+  echo ""
+  echo "Build configuration for PDlib v1.0.2 done correctly."
+  echo ""
+  echo "  dlib version: $LIBDLIB_VERSON"
+  echo ""
+  echo "  CXXFLAGS    : $CXXFLAGS"
+  echo "  LDFLAGS     : $LDFLAGS"
+  echo "  LIBDIR:     : $LIBDLIB_LIBDIR"
+  echo "  LIBADD:     : $PDLIB_SHARED_LIBADD"
+  echo ""
+  echo "Please submit bug reports at:"
+  echo "  https://github.com/goodspb/pdlib/issues"
+  echo ""
+])

pdlib.cc

@@ -33,6 +33,8 @@ extern "C" {
 #include "src/face_recognition.h"
 #include "src/cnn_face_detection.h"
 #include "src/face_landmark_detection.h"
+#include "src/vector.h"
+
 #include <dlib/revision.h>
 
 /* If you declare any globals in php_pdlib.h uncomment this:
@@ -222,6 +224,46 @@ PHP_MINFO_FUNCTION(pdlib)
 	php_info_print_table_row(2, "pdlib extension version", PHP_PDLIB_VERSION);
 	snprintf(buf, sizeof(buf), "%d.%d.%d", DLIB_MAJOR_VERSION, DLIB_MINOR_VERSION, DLIB_PATCH_VERSION);
 	php_info_print_table_row(2, "dlib library version", buf);
+#ifdef DLIB_USE_CUDA
+	php_info_print_table_header(2, "DLIB_USE_CUDA", "true");
+#else
+	php_info_print_table_header(2, "DLIB_USE_CUDA", "false");
+#endif
+#ifdef DLIB_USE_BLAS
+	php_info_print_table_header(2, "DLIB_USE_BLAS", "true");
+#else
+	php_info_print_table_header(2, "DLIB_USE_BLAS", "false");
+#endif
+#ifdef DLIB_USE_LAPACK
+	php_info_print_table_header(2, "DLIB_USE_LAPACK", "true");
+#else
+	php_info_print_table_header(2, "DLIB_USE_LAPACK", "false");
+#endif
+#ifdef DLIB_HAVE_AVX
+	php_info_print_table_header(2, "USE_AVX_INSTRUCTIONS", "true");
+#else
+	php_info_print_table_header(2, "USE_AVX_INSTRUCTIONS", "false");
+#endif
+#ifdef DLIB_HAVE_AVX2
+	php_info_print_table_header(2, "USE_AVX2_INSTRUCTIONS", "true");
+#else
+	php_info_print_table_header(2, "USE_AVX2_INSTRUCTIONS", "false");
+#endif
+#ifdef DLIB_HAVE_NEON
+	php_info_print_table_header(2, "USE_NEON_INSTRUCTIONS", "true");
+#else
+	php_info_print_table_header(2, "USE_NEON_INSTRUCTIONS", "false");
+#endif
+#ifdef DLIB_HAVE_SSE2
+	php_info_print_table_header(2, "USE_SSE2_INSTRUCTIONS", "true");
+#else
+	php_info_print_table_header(2, "USE_SSE2_INSTRUCTIONS", "false");
+#endif
+#ifdef DLIB_HAVE_SSE41
+	php_info_print_table_header(2, "USE_SSE4_INSTRUCTIONS", "true");
+#else
+	php_info_print_table_header(2, "USE_SSE4_INSTRUCTIONS", "false");
+#endif
 	php_info_print_table_end();
 
 	/* Remove comments if you have entries in php.ini
@@ -238,6 +280,7 @@ const zend_function_entry pdlib_functions[] = {
 	PHP_FE(dlib_chinese_whispers, dlib_chinese_whispers_arginfo)
 	PHP_FE(dlib_face_detection, dlib_face_detection_arginfo)
 	PHP_FE(dlib_face_landmark_detection, dlib_face_landmark_detection_arginfo)
+	PHP_FE(dlib_vector_length, dlib_vector_length_arginfo)
 	PHP_FE_END	/* Must be the last line in pdlib_functions[] */
 };
 /* }}} */
@@ -246,7 +289,7 @@ const zend_function_entry pdlib_functions[] = {
  */
 zend_module_entry pdlib_module_entry = {
 	STANDARD_MODULE_HEADER,
-	"pdlib",
+	PHP_PDLIB_NAME,
 	pdlib_functions,
 	PHP_MINIT(pdlib),
 	PHP_MSHUTDOWN(pdlib),

php_pdlib.h

@@ -31,7 +31,8 @@ extern "C" {
 extern zend_module_entry pdlib_module_entry;
 #define phpext_pdlib_ptr &pdlib_module_entry
 
-#define PHP_PDLIB_VERSION "1.0.1" /* Replace with version number for your extension */
+#define PHP_PDLIB_VERSION "1.0.2"
+#define PHP_PDLIB_NAME     "pdlib"
 
 #ifdef PHP_WIN32
 #	define PHP_PDLIB_API __declspec(dllexport)

src/vector.cc

@@ -0,0 +1,43 @@
+
+#include "../php_pdlib.h"
+
+#include "vector.h"
+
+#include <cmath>
+#include <zend_exceptions.h>
+#include <iostream>
+
+using namespace std;
+
+PHP_FUNCTION(dlib_vector_length)
+{
+	zval *x_arg, *y_arg;
+
+	if (zend_parse_parameters_throw(ZEND_NUM_ARGS(), "aa", &x_arg, &y_arg) == FAILURE) {
+		return;
+	}
+
+	zval *elem_x, *elem_y;
+	double sum = 0.0;
+	unsigned int i, len;
+
+	len = zend_hash_num_elements(Z_ARRVAL_P(x_arg));
+
+	if (len != zend_hash_num_elements(Z_ARRVAL_P(y_arg))) {
+		zend_throw_exception_ex(
+			zend_ce_exception,
+			0,
+			"The arrays have different sizes");
+		return;
+	}
+
+	for (i = 0 ; i < len ; i++) {
+		elem_x = zend_hash_index_find(Z_ARRVAL_P(x_arg), i);
+		elem_y = zend_hash_index_find(Z_ARRVAL_P(y_arg), i);
+
+		sum += (Z_DVAL_P(elem_x) - Z_DVAL_P(elem_y))*(Z_DVAL_P(elem_x) - Z_DVAL_P(elem_y));
+	}
+
+	RETURN_DOUBLE(sqrt(sum));
+}
+

src/vector.h

@@ -0,0 +1,10 @@
+#ifndef PHP_DLIB_VECTOR_H
+#define PHP_DLIB_VECTOR_H
+
+ZEND_BEGIN_ARG_INFO_EX(dlib_vector_length_arginfo, 0, 0, 2)
+    ZEND_ARG_ARRAY_INFO(0, x_arg, 0)
+    ZEND_ARG_ARRAY_INFO(0, y_arg, 0)
+ZEND_END_ARG_INFO()
+PHP_FUNCTION(dlib_vector_length);
+
+#endif //PHP_DLIB_VECTOR_H

tests/vector_length.phpt

@@ -0,0 +1,20 @@
+--TEST--
+Basic tests for dlib_vector_length
+--SKIPIF--
+<?php if (!extension_loaded("pdlib")) print "skip"; ?>
+--FILE--
+<?php
+$vectorAL = [0.0, 0.0];
+$vectorAR = [0.0, 1.0];
+var_dump(dlib_vector_length($vectorAL, $vectorAR));
+$vectorBL = [0.0, 0.0, -1.0];
+$vectorBR = [0.0, 0.0, 1.0];
+var_dump(dlib_vector_length($vectorBL, $vectorBR));
+$vectorCL = [0.0, 2.5, 1.0];
+$vectorCR = [0.0, 1.0, 1.0];
+var_dump(dlib_vector_length($vectorCL, $vectorCR));
+?>
+--EXPECT--
+float(1)
+float(2)
+float(1.5)

tests/version.phpt

@@ -0,0 +1,10 @@
+--TEST--
+Just test php extension version
+--SKIPIF--
+<?php if (!extension_loaded("pdlib")) print "skip"; ?>
+--FILE--
+<?php
+var_dump(phpversion('pdlib'));
+?>
+--EXPECT--
+string(5) "1.0.2"